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  • 1
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-02-05
    Beschreibung: The acquired immunodeficiency syndrome (AIDS) and infection with the human immunodeficiency virus type 1 (HIV-1) constitute a worldwide public health problem. Whereas in Europe and in most of the Americas transmission of HIV-1 has occurred predominantly among homosexual men and intravenous drug abusers, in Africa a distinct epidemiologic pattern has emerged that indicates that HIV-1 infection is mainly heterosexually acquired. Heterosexual transmission appears to be increasing in some parts of Latin America and the Caribbean, and possibly in the United States. In addition to HIV-1, at least one other human retrovirus, namely HIV-2, has been implicated as a cause of AIDS in Africa and Europe. Factors that influence heterosexual transmission of HIV-1 include genital ulcerations, early or late stages of HIV-1 infection in the index case, and possibly oral contraception and immune activation. The rate of perinatal transmission is enhanced when the mother's illness is more advanced. AIDS and HIV-1 infection may have a significant impact not only on public health, but also on the demography and socioeconomic conditions of some developing countries. Programs for the prevention and control of AIDS should be an immediate priority in all countries.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Piot, P -- Plummer, F A -- Mhalu, F S -- Lamboray, J L -- Chin, J -- Mann, J M -- New York, N.Y. -- Science. 1988 Feb 5;239(4840):573-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology, Institute of Tropical Medicine, Antwerp, Belgium.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3277271" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Acquired Immunodeficiency Syndrome/epidemiology/prevention & ; control/*transmission ; Female ; HIV/classification/pathogenicity ; Humans ; Infant, Newborn ; Male ; Pregnancy ; Sexual Behavior
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-05-13
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roberts, L -- New York, N.Y. -- Science. 1988 May 13;240(4854):878-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3363368" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Administrative Personnel ; *Base Sequence ; *Chromosomes, Human ; *Genes ; Humans ; National Institutes of Health (U.S.)/*organization & administration ; Research Support as Topic/economics/legislation & jurisprudence ; United States
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Publikationsdatum: 1988-04-29
    Beschreibung: Spontaneous diabetes mellitus was blocked in nonobese diabetic mice by treatment with a monoclonal antibody against the L3T4 determinant present on the surface of T-helper lymphocytes. Sustained treatment with the monoclonal antibody led to cessation of the lymphocytic infiltration associated with the destruction of the insulin-producing beta cells. Moreover, the mice remained normoglycemic after the antibody therapy was stopped. These studies indicate that immunotherapy with monoclonal antibodies to the lymphocyte subset may not only halt the progression of diabetes, but may lead to long-term reversal of the disease after therapy has ended.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shizuru, J A -- Taylor-Edwards, C -- Banks, B A -- Gregory, A K -- Fathman, C G -- AI11313/AI/NIAID NIH HHS/ -- DK39959/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1988 Apr 29;240(4852):659-62.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Stanford University Medical Center, CA 94305-5111.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2966437" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Antibodies, Monoclonal/*therapeutic use ; Antigens, Differentiation, T-Lymphocyte/*immunology ; Cyclosporins/therapeutic use ; Diabetes Mellitus, Experimental/pathology/*therapy ; Female ; *Immunotherapy ; Islets of Langerhans/pathology ; Lymphocytes/pathology ; Mice ; Mice, Inbred ICR ; T-Lymphocytes, Helper-Inducer/*immunology/pathology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Publikationsdatum: 1988-07-29
    Beschreibung: An octamer DNA sequence plays a critical role in directing transcription of immunoglobulin genes in B lymphocytes. A new technique of direct binding of radioactive DNA was used to screen a complementary DNA expression library from the BJAB cell line in lambda gt11 phage to derive molecular cDNA clones representing a putative B lymphocyte-specific octamer binding protein. The plaques were screened with DNA containing four copies of the octamer sequence and positive phage recombinants were identified. The fusion protein produced on inducing a lysogen of one phage bound to a monomeric octamer probe. The cDNA insert from this phage hybridized to messenger RNA found in B lymphocytes, but not in most other cells. Thus, this cDNA derives from a gene (oct-2) that specifies an octamer binding protein expressed preferentially in B lymphocytes, proving that, for at least one gene, a cell-specific transcription factor exists and its amount is controlled through messenger RNA availability.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Staudt, L M -- Clerc, R G -- Singh, H -- LeBowitz, J H -- Sharp, P A -- Baltimore, D -- P01-CA42063/CA/NCI NIH HHS/ -- P30-CAL4051/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1988 Jul 29;241(4865):577-80.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Whitehead Institute for Biomedical Research, Cambridge, MA 02142.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3399892" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Cloning, Molecular ; DNA/genetics ; DNA-Binding Proteins/*physiology ; Gene Expression Regulation ; *Genes ; Humans ; Lymphocytes/*physiology ; *Regulatory Sequences, Nucleic Acid ; Transcription Factors/*physiology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 5
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-07-22
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McLaren, D S -- New York, N.Y. -- Science. 1988 Jul 22;241(4864):399-400.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3393905" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Energy Metabolism ; Female ; Humans ; *Longevity ; Male ; Sex Factors
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 6
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-01-15
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sun, M -- New York, N.Y. -- Science. 1988 Jan 15;239(4837):252.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3276002" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Breast Neoplasms/*etiology/prevention & control ; Clinical Trials as Topic/economics ; Dietary Fats/administration & dosage/*adverse effects ; Female ; Humans ; National Institutes of Health (U.S.) ; United States
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 7
    Publikationsdatum: 1988-08-05
    Beschreibung: The human pS2 gene is specifically expressed under estrogen transcriptional control in a subclass of estrogen receptor-containing human breast cancer cells. The pS2 gene encodes an 84-amino acid protein that is secreted after signal peptide cleavage. The distribution of pS2 protein in normal human tissues was studied with antibodies to pS2; pS2 was specifically expressed and secreted by mucosa cells of the normal stomach antrum and body of both female and male individuals. Moreover, no estrogen receptor could be detected in these cells, indicating that pS2 gene expression is estrogen-independent in the stomach. The function of the pS2 protein in the gastrointestinal tract is unknown. However, the pS2 protein is similar in sequence to a porcine pancreatic protein that has been shown to inhibit gastrointestinal motility and gastric secretion.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rio, M C -- Bellocq, J P -- Daniel, J Y -- Tomasetto, C -- Lathe, R -- Chenard, M P -- Batzenschlager, A -- Chambon, P -- New York, N.Y. -- Science. 1988 Aug 5;241(4866):705-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉CNRS et U. 184 de l'INSERM, Institut de Chimie Biologique, Faculte de Medecine, Strasbourg, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3041593" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Antibodies, Monoclonal ; Breast Neoplasms/*metabolism ; Estrogens/pharmacology ; Exons ; Female ; Gastric Mucosa/*metabolism ; *Gene Expression Regulation ; Histocytochemistry ; Humans ; Immunoenzyme Techniques ; Male ; Molecular Sequence Data ; Neoplasm Proteins/*biosynthesis/genetics/secretion ; *Proteins ; RNA, Messenger/metabolism ; Receptors, Estrogen/metabolism ; Sequence Homology, Nucleic Acid ; Tissue Distribution ; Tumor Cells, Cultured ; Tumor Suppressor Proteins
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    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 8
    Publikationsdatum: 1988-10-14
    Beschreibung: Structural changes of the human retinoblastoma gene have been demonstrated previously in retinoblastoma and some clinically related tumors including osteosarcoma. Structural aberrations of the retinoblastoma locus (RB1) were observed in 25% of breast tumor cell lines studied and 7% of the primary tumors. These changes include homozygous internal deletions and total deletion of RB1; a duplication of an exon was observed in one of the cell lines. In all cases, structural changes either resulted in the absence or truncation of the RB1 transcript. No obvious defect in RB1 was detected by DNA blot analysis in primary tumors or cell lines from Wilms' tumor, cervical carcinoma, or hepatoma. These results further support the concept that the human RB1 gene has pleiotropic effects on specific types of cancer.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉T'Ang, A -- Varley, J M -- Chakraborty, S -- Murphree, A L -- Fung, Y K -- CA44754/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1988 Oct 14;242(4876):263-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Hematology/Oncology, Childrens Hospital of Los Angeles, CA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3175651" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Breast Neoplasms/*genetics ; Chromosome Aberrations ; Chromosomes, Human, Pair 13 ; DNA/genetics ; DNA Probes ; Exons ; Eye Neoplasms/*genetics ; Female ; *Gene Rearrangement ; Homozygote ; Humans ; Lymphatic Metastasis ; Menopause ; Mutation ; Nucleic Acid Hybridization ; Retinoblastoma/*genetics ; Risk Factors ; Tumor Cells, Cultured
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 9
    Publikationsdatum: 1988-07-15
    Beschreibung: In 1979, a mass poisoning occurred in Taiwan from cooking oil contaminated by thermally degraded polychlorinated biphenyls. Because these chemicals persist in human tissue, children born to female patients after the outbreak were exposed in utero. In 1985, 117 children born to affected women and 108 unexposed controls were examined and evaluated. The exposed children were shorter and lighter than controls; they had abnormalities of gingiva, skin, nails, teeth, and lungs more frequently than did controls. The exposed children showed delay of developmental milestones, deficits on formal developmental testing, and abnormalities on behavioral assessment. These findings are most consistent with a generalized disorder of ectodermal tissue. This syndrome is one of very few documented to result from transplacental exposure to pollutant chemicals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rogan, W J -- Gladen, B C -- Hung, K L -- Koong, S L -- Shih, L Y -- Taylor, J S -- Wu, Y C -- Yang, D -- Ragan, N B -- Hsu, C C -- New York, N.Y. -- Science. 1988 Jul 15;241(4863):334-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3133768" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Conjunctivitis/chemically induced/congenital ; Female ; Growth Disorders/chemically induced ; Humans ; Lactation ; Maternal-Fetal Exchange ; Nails, Malformed ; Oils/*adverse effects ; Pigmentation Disorders/chemically induced/congenital ; Polychlorinated Biphenyls/*poisoning ; Pregnancy ; Taiwan
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 10
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-01-29
    Beschreibung: Regulation of the synthesis of membrane-bound and secreted immunoglobulin mu heavy chains at the level of RNA processing is an important element for B cell development. The precursor mu RNA is either polyadenylated at the upstream poly(A) site (for the secreted form) or spliced (for the membrane-bound form) in a mutually exclusive manner. When the mouse mu gene linked to the SV40/HSV-TK hybrid promoter was microinjected into Xenopus oocytes, the mu messenger RNA (mRNA) was altered by coinjection of nuclei of mouse surface IgM-bearing B-lymphoma cells to include the synthesis of the membrane-bound form. An increase in the membrane-bound form was not observed when nuclei of IgM-secreting hybridoma cells or fibroblast cells were coinjected. Deletion of the upstream poly(A) site did not eliminate the effect of B-lymphoma nuclei suggesting that membrane-specific splicing is stimulated. Further, splicing of other mu gene introns was not affected by coinjection of B-lymphoma nuclei. These results suggest that mature B cells contain one or more transacting nuclear factors that stimulate splicing specific for membrane-bound mu mRNA.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tsurushita, N -- Ho, L -- Korn, L J -- AI21298/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1988 Jan 29;239(4839):494-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, Stanford University School of Medicine, CA 94305.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3124268" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; B-Lymphocytes/immunology/ultrastructure ; Cell Membrane/metabolism ; Cell Nucleus/*physiology ; DNA, Recombinant ; Female ; Hybridomas/ultrastructure ; Immunoglobulin M/genetics ; Immunoglobulin mu-Chains/*genetics ; Introns ; Lymphoma/*immunology/ultrastructure ; Mice ; Microinjections ; Nuclear Transfer Techniques ; Oocytes/*metabolism ; Plasmids ; Promoter Regions, Genetic ; *RNA Splicing ; RNA, Messenger/*genetics ; Tumor Cells, Cultured ; Xenopus
    Print ISSN: 0036-8075
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 11
    Publikationsdatum: 1988-12-23
    Beschreibung: The ras p21 GTPase-activating protein (GAP) was purified from human placental tissue. Internal amino acid sequence was obtained from this 120,000-dalton protein and, by means of this sequence, two types of complementary DNA clones were isolated and characterized. One type encoded GAP with a predicted molecular mass of 116,000 daltons and 96% identity with bovine GAP. The messenger RNA of this GAP was detected in human lung, brain, liver, leukocytes, and placenta. The second type appeared to be generated by a differential splicing mechanism and encoded a novel form of GAP with a predicted molecular mass of 100,400 daltons. This protein lacks the hydrophobic amino terminus characteristic of the larger species, but retains GAP activity. The messenger RNA of this type was abundantly expressed in placenta and in several human cell lines, but not in adult tissues.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Trahey, M -- Wong, G -- Halenbeck, R -- Rubinfeld, B -- Martin, G A -- Ladner, M -- Long, C M -- Crosier, W J -- Watt, K -- Koths, K -- New York, N.Y. -- Science. 1988 Dec 23;242(4886):1697-700.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, Cetus Corp., Emeryville, CA 94608.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3201259" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Base Sequence ; Brain Chemistry ; *Cloning, Molecular ; DNA/*genetics/isolation & purification ; Female ; GTPase-Activating Proteins ; Gene Expression Regulation ; Humans ; Leukocytes/analysis ; Liver/analysis ; Lung/analysis ; Molecular Sequence Data ; Molecular Weight ; Nucleic Acid Hybridization ; Oligonucleotide Probes ; Placenta/*analysis ; Pregnancy ; Proteins/*genetics/isolation & purification ; RNA, Messenger/analysis/genetics ; Sequence Homology, Nucleic Acid ; ras GTPase-Activating Proteins
    Print ISSN: 0036-8075
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 12
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-06-17
    Beschreibung: Unequal crossing-over within a head-to-tail tandem array of the homologous red and green visual pigment genes has been proposed to explain the observed variation in green-pigment gene number among individuals and the prevalence of red-green fusion genes among color-blind subjects. This model was tested by probing the structure of the red and green pigment loci with long-range physical mapping techniques. The loci were found to constitute a gene array with an approximately 39-kilobase repeat length. The position of the red pigment gene at the 5' edge of the array explains its lack of variation in copy number. Restriction maps of the array in four individuals who differ in gene number are consistent with a head-to-tail configuration of the genes. These results provide physical evidence in support of the model and help to explain the high incidence of color blindness in the human population.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vollrath, D -- Nathans, J -- Davis, R W -- GM21891/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1988 Jun 17;240(4859):1669-72.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, Stanford University School of Medicine, CA 94305.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2837827" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Color Vision Defects/*genetics ; Crossing Over, Genetic ; DNA/genetics ; DNA Restriction Enzymes ; Electrophoresis, Agar Gel ; Exons ; Female ; Genetic Variation ; Humans ; Male ; Nucleic Acid Hybridization ; Recombination, Genetic ; Repetitive Sequences, Nucleic Acid ; Retinal Pigments/*genetics ; *X Chromosome
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 13
    Publikationsdatum: 1988-04-15
    Beschreibung: A new type of agonist-binding subunit of rat neuronal nicotinic acetylcholine receptors (nAChRs) was identified. Rat genomic DNA and complementary DNA encoding this subunit (alpha 2) were cloned and analyzed. Complementary DNA expression studies in Xenopus oocytes revealed that the injection of messenger RNAs (mRNAs) for alpha 2 and beta 2 (a neuronal nAChR subunit) led to the generation of a functional nAChR. In contrast to the other known neuronal nAChRs, the receptor produced by the injection of alpha 2 and beta 2 mRNAs was resistant to the alpha-neurotoxin Bgt3.1. In situ hybridization histochemistry showed that alpha 2 mRNA was expressed in a small number of regions, in contrast to the wide distribution of the other known agonist-binding subunits (alpha 3 and alpha 4) mRNAs. These results demonstrate that the alpha 2 subunit differs from other known agonist-binding alpha-subunits of nAChRs in its distribution in the brain and in its pharmacology.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wada, K -- Ballivet, M -- Boulter, J -- Connolly, J -- Wada, E -- Deneris, E S -- Swanson, L W -- Heinemann, S -- Patrick, J -- New York, N.Y. -- Science. 1988 Apr 15;240(4850):330-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Salk Institute for Biological Studies, San Diego, CA 92138.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2832952" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Animals ; Base Sequence ; Brain/*metabolism ; DNA Restriction Enzymes ; Female ; *Genes ; Molecular Sequence Data ; Neurons/metabolism ; Nucleotide Mapping ; Oocytes/metabolism ; Rats ; Receptors, Nicotinic/*genetics/metabolism ; Transcription, Genetic ; Xenopus laevis
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 14
    Publikationsdatum: 1988-04-29
    Beschreibung: Zeins, the storage proteins of maize, are totally lacking in the essential amino acids lysine and tryptophan. Lysine codons and lysine- and tryptophan-encoding oligonucleotides were introduced at several positions into a 19-kilodalton zein complementary DNA by oligonucleotide-mediated mutagenesis. A 450-base pair open reading frame from a simian virus 40 (SV40) coat protein was also engineered into the zein coding region. Messenger RNAs for the modified zeins were synthesized in vitro with an SP6 RNA polymerase system and injected into Xenopus laevis oocytes. The modifications did not affect the translation, signal peptide cleavage, or stability of the zeins. The ability of the modified zeins to assemble into structures similar to maize protein bodies was assayed by two criteria: assembly into membrane-bound vesicles resistant to exogenously added protease, and ability to self-aggregate into dense structures. All of the modified zeins were membrane-bound; only the one containing a 17-kilodalton SV40 protein fragment was unable to aggregate. These findings suggest that it may be possible to create high-lysine corn by genetic engineering.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wallace, J C -- Galili, G -- Kawata, E E -- Cuellar, R E -- Shotwell, M A -- Larkins, B A -- New York, N.Y. -- Science. 1988 Apr 29;240(4852):662-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2834822" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Animals ; Cell Membrane/metabolism ; DNA/genetics ; DNA, Recombinant ; Female ; Genetic Engineering ; *Lysine/genetics ; Macromolecular Substances ; Molecular Sequence Data ; Mutation ; Oocytes/*metabolism ; Peptide Hydrolases/metabolism ; RNA, Messenger/genetics ; Simian virus 40/genetics ; Xenopus laevis ; Zea mays ; Zein/genetics/*metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 15
    Publikationsdatum: 1988-12-09
    Beschreibung: Leber's hereditary optic neuropathy is a maternally inherited disease resulting in optic nerve degeneration and cardiac dysrhythmia. A mitochondrial DNA replacement mutation was identified that correlated with this disease in multiple families. This mutation converted a highly conserved arginine to a histidine at codon 340 in the NADH dehydrogenase subunit 4 gene and eliminated an Sfa NI site, thus providing a simple diagnostic test. This finding demonstrated that a nucleotide change in a mitochondrial DNA energy production gene can result in a neurological disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wallace, D C -- Singh, G -- Lott, M T -- Hodge, J A -- Schurr, T G -- Lezza, A M -- Elsas, L J 2nd -- Nikoskelainen, E K -- NS21328/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1988 Dec 9;242(4884):1427-30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, Emory University School of Medicine, Atlanta, GA 30322.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3201231" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): African Continental Ancestry Group ; Animals ; Arginine ; Cytochrome Reductases/*genetics ; DNA, Mitochondrial/*genetics ; European Continental Ancestry Group ; Female ; *Genes ; Georgia ; Hereditary Sensory and Motor Neuropathy/*genetics ; Histidine ; Humans ; Macromolecular Substances ; Male ; *Mutation ; NADH Dehydrogenase/*genetics ; Optic Atrophies, Hereditary/*genetics ; Pedigree ; Reference Values
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 16
    Publikationsdatum: 1988-04-29
    Beschreibung: Screening for human T-lymphotropic virus type I (HTLV-I) antibodies was performed on sera from 39,898 blood donors at eight blood centers in geographically distinct areas of the United States. Ten donors (0.025 percent) showed evidence of HTLV-I seropositivity by enzyme immunoassays; this was confirmed by protein immunoblot and radioimmunoprecipitation. Seroprevalence rates ranged from 0 to 0.10 percent at the locations sampled, with HTLV-I antibodies found predominantly in donors from the southeastern and southwestern United States. Matched case-control interviews and laboratory studies were performed on five seropositive women and two seropositive men who participated in an identity-linked collection of sera from a subset of 33,893 donors at six of the eight blood centers. Four of the women and both men are black; one woman is Caucasian. Four of the seven seropositive individuals admitted to prior intravenous drug abuse or sexual contact with an intravenous drug user. Sexual contact with native inhabitants of an HTLV-I endemic area was the only identified risk factor for one male. The distribution of HTLV-I antibodies in this U.S. blood donor sample corroborates the previously reported epidemiology of this agent and suggests that additional donor screening measures, including the testing of donated blood for HTLV-I markers, may be necessary to prevent the spread of HTLV-I to transfusion recipients.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Williams, A E -- Fang, C T -- Slamon, D J -- Poiesz, B J -- Sandler, S G -- Darr, W F 2nd -- Shulman, G -- McGowan, E I -- Douglas, D K -- Bowman, R J -- New York, N.Y. -- Science. 1988 Apr 29;240(4852):643-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉American Red Cross Jerome H. Holland Laboratory, Rockville, MD 20855.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2896386" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adult ; Antibodies, Viral/*analysis ; *Blood Donors ; Deltaretrovirus/*immunology/isolation & purification ; Deltaretrovirus Infections/diagnosis/*epidemiology/transmission ; Female ; Humans ; Immunoenzyme Techniques ; Immunosorbent Techniques ; Japan ; Male ; Middle Aged ; Risk Factors ; Sexual Partners ; Substance-Related Disorders ; United States
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 17
    Publikationsdatum: 1988-08-12
    Beschreibung: Interleukin-6 (IL-6/BSF-2/IFN beta 2) is a multifunctional cytokine that regulates the growth and differentiation of various tissues, and is known particularly for its role in the immune response and acute phase reactions. A complementary DNA encoding the human IL-6 receptor (IL-6-R) has now been isolated. The IL-6-R consists of 468 amino acids, including a signal peptide of approximately 19 amino acids and a domain of approximately 90 amino acids that is similar to a domain in the immunoglobulin (Ig) superfamily. The cytoplasmic domain of approximately 82 amino acids lacks a tyrosine/kinase domain, unlike other growth factor receptors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yamasaki, K -- Taga, T -- Hirata, Y -- Yawata, H -- Kawanishi, Y -- Seed, B -- Taniguchi, T -- Hirano, T -- Kishimoto, T -- New York, N.Y. -- Science. 1988 Aug 12;241(4867):825-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Immunology, Osaka University, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3136546" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Base Sequence ; Cell Line ; *Cloning, Molecular ; DNA/genetics/isolation & purification ; *Genes ; Humans ; Immunoglobulin kappa-Chains/genetics ; Molecular Sequence Data ; Receptors, Immunologic/genetics ; Receptors, Interleukin-6 ; Sequence Homology, Nucleic Acid ; *Transcription, Genetic
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 18
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-06-03
    Beschreibung: Inbred male mice typically prefer to mate with females of a different, non-self H-2 haplotype. To determine whether this natural preference is irrevocable or results from familial imprinting, a test system was used which relied on previous observations that B6 males (H-2b) mate preferentially with congenic B6-H-2k rather than B6 females, and B6-H-2k males with B6 females. This preference was reversed in B6 males fostered by B6-H-2k parents and in B6-H-2k males fostered by B6 parents, preference in these cases favoring the same H-2 type. Thus, H-2 selective mating preference is acquired by imprinting on familial H-2 types.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yamazaki, K -- Beauchamp, G K -- Kupniewski, D -- Bard, J -- Thomas, L -- Boyse, E A -- CA-39827/CA/NCI NIH HHS/ -- GMCA-32096/GM/NIGMS NIH HHS/ -- NS-22623/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1988 Jun 3;240(4857):1331-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Monell Chemical Senses Center, Philadelphia, PA 19104.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3375818" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Female ; H-2 Antigens/*genetics ; *Imprinting (Psychology) ; Male ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Mice, Inbred Strains ; Odors ; *Sexual Behavior, Animal ; Smell/physiology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 19
    Publikationsdatum: 1988-05-06
    Beschreibung: A point mutation in the human insulin receptor gene in a patient with type A insulin resistance alters the amino acid sequence within the tetrabasic processing site of the proreceptor molecule from Arg-Lys-Arg-Arg to Arg-Lys-Arg-Ser. Epstein-Barr virus-transformed lymphocytes from this patient synthesize an insulin receptor precursor that is normally glycosylated and inserted into the plasma membrane but is not cleaved to mature alpha and beta subunits. Insulin binding to these cells is severely reduced but can be increased about fivefold by gentle treatment with trypsin, accompanied by the appearance of normal alpha subunits. These results indicate that proteolysis of the proreceptor is necessary for its normal full insulin-binding sensitivity and signal-transducing activity and that a cellular protease that is more stringent in its specificity than trypsin is required to process the receptor precursor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yoshimasa, Y -- Seino, S -- Whittaker, J -- Kakehi, T -- Kosaki, A -- Kuzuya, H -- Imura, H -- Bell, G I -- Steiner, D F -- AM 13914/AM/NIADDK NIH HHS/ -- AM 20595/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1988 May 6;240(4853):784-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Biology, University of Chicago, IL 60637.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3283938" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adult ; Amino Acid Sequence ; Cell Membrane/metabolism ; Cells, Cultured ; DNA/genetics ; Diabetes Mellitus/*genetics/metabolism ; Female ; Glycosylation ; Humans ; Insulin/metabolism ; Insulin Resistance/*genetics ; Lymphocytes/metabolism ; Molecular Sequence Data ; Mutation ; Nucleic Acid Hybridization ; Protein Precursors/*genetics/metabolism ; RNA, Messenger/metabolism ; Receptor, Insulin/*genetics/metabolism ; Trypsin/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 20
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-10-14
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marshall, E -- New York, N.Y. -- Science. 1988 Oct 14;242(4876):183-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3175643" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Anabolic Agents/adverse effects ; *Doping in Sports/legislation & jurisprudence ; Female ; Humans ; Male ; Risk Factors ; Stanozolol ; Substance-Related Disorders/*economics
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 21
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-10-07
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1988 Oct 7;242(4875):32-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3175634" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Animals, Genetically Modified ; *Genes ; *Genetic Engineering ; Humans ; Mice ; Mice, Mutant Strains ; Swine
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 22
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-05-13
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1988 May 13;240(4854):880-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3363370" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; *Biological Evolution ; Gene Expression Regulation ; *Genes ; *Growth ; Plant Development ; Plants/genetics
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 23
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-03-25
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1988 Mar 25;239(4847):1493-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2832939" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Bone Diseases/genetics ; Collagen/genetics ; *Genes ; *Growth ; Growth Substances/physiology ; Humans ; Intercellular Junctions ; Mutation ; Receptors, Cell Surface/genetics
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 24
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-01-22
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1988 Jan 22;239(4838):352-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3336789" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; DNA/metabolism ; Female ; *Gene Expression Regulation ; Genes ; Humans ; Male ; Methylation ; Mice ; Mice, Transgenic ; *Sex Characteristics ; Tissue Distribution
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 25
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-08-19
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1988 Aug 19;241(4868):903-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3043664" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Brain/*metabolism ; Female ; Humans ; Male ; Menopause/*physiology ; Mice ; Pituitary Hormone-Releasing Hormones/*biosynthesis ; Puberty/*physiology ; Rats ; Sexual Maturation
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 26
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-01-22
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1988 Jan 22;239(4838):351.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3336788" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): DNA/genetics ; *Genes ; Humans ; Receptors, Antigen, T-Cell/*genetics
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 27
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-01-29
    Beschreibung: The nonobese diabetic (NOD) mouse is an animal model of type I diabetes and develops a characteristic autoimmune lesion in the islets of Langerhans with lymphocytic infiltration and destruction of pancreatic beta cells. The result is hypoinsulinemia, hyperglycemia, ketoacidosis, and death. Diabetes usually begins by the sixth month of age but can occur earlier when young NOD mice are infused with lymphocytes from older NOD donors. When newborn or adult NOD mice were infected with a lymphotropic virus they did not become diabetic. The interaction between viruses and lymphocytes is pivotal in aborting diabetes, as established by experiments in which lymphocytes from virus-infected donors failed to transfer diabetes. In contrast, lymphocytes from age- and sex-matched uninfected donors caused disease. Therefore, viruses and, presumably, their products can be developed to be beneficial and may have potential as a component for treatment of human diseases. Further, these results point to the utility of viruses as probes for dissecting the pathogenesis of a nonviral disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Oldstone, M B -- AG-04342/AG/NIA NIH HHS/ -- AI-09484/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1988 Jan 29;239(4839):500-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology, Research Institute of Scripps Clinic, La Jolla, CA 92037.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3277269" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Autoimmune Diseases/pathology ; Bone Marrow/pathology ; Diabetes Mellitus, Experimental/immunology/pathology/*prevention & control ; Diabetes Mellitus, Type 1/immunology/pathology/*prevention & control ; Female ; Islets of Langerhans/pathology ; Lymphocyte Transfusion ; Lymphocytes/immunology ; Lymphocytic Choriomeningitis/*immunology/pathology ; Mice ; Spleen/pathology ; T-Lymphocytes/immunology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 28
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-05-06
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sun, M -- New York, N.Y. -- Science. 1988 May 6;240(4853):714-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2966438" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Abnormalities, Drug-Induced ; Acne Vulgaris/*drug therapy ; Female ; Humans ; Isotretinoin ; *Legislation, Drug ; Pregnancy ; Tretinoin/*adverse effects/therapeutic use ; United States ; United States Food and Drug Administration
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 29
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-01-01
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sun, M -- New York, N.Y. -- Science. 1988 Jan 1;239(4835):17-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3336770" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Breast Neoplasms/*etiology ; Dietary Fats/adverse effects ; Female ; Humans ; Research Support as Topic
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 30
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-04-01
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roberts, L -- New York, N.Y. -- Science. 1988 Apr 1;240(4848):27.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3353707" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adult ; China ; *Diet ; Diet Surveys ; Female ; *Health ; Humans ; Male ; Middle Aged ; Neoplasms/epidemiology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 31
    Publikationsdatum: 1988-10-21
    Beschreibung: Expression of a complementary DNA (cDNA) encoding the mouse MyoD1 protein in a variety of fibroblast and adipoblast cell lines converts them to myogenic cells. Polyclonal antisera to fusion proteins containing the MyoD1 sequence show that MyoD1 is a phosphoprotein present in the nuclei of proliferating myoblasts and differentiated myotubes but not expressed in 10T1/2 fibroblasts or other nonmuscle cell types. Functional domains of the MyoD1 protein were analyzed by site-directed deletional mutagenesis of the MyoD1 cDNA. Deletion of a highly basic region (residues 102 to 135) interferes with both nuclear localization and induction of myogenesis. Deletion of a short region (residues 143 to 162) that is similar to a conserved region in the c-Myc family of proteins eliminates the ability of the MyoD1 protein to initiate myogenesis but does not alter nuclear localization. Deletions of regions spanning the remainder of MyoD1 did not affect nuclear localization and did not inhibit myogenesis. Furthermore, expression of only 68 amino acids of MyoD1, containing the basic and the Myc similarity domains, is sufficient to activate myogenesis in stably transfected 10T1/2 cells. Genetic analysis maps the MyoD1 gene to mouse chromosome 7 and human chromosome 11.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tapscott, S J -- Davis, R L -- Thayer, M J -- Cheng, P F -- Weintraub, H -- Lassar, A B -- New York, N.Y. -- Science. 1988 Oct 21;242(4877):405-11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, Fred Hutchinson Cancer Research Center, Seattle, WA 98104.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3175662" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Cell Differentiation ; Cell Division ; Cells, Cultured ; Chromosome Mapping ; DNA/genetics ; Fibroblasts/cytology ; *Genes ; Humans ; Mice ; Muscles/cytology ; *MyoD Protein ; Nuclear Proteins/*genetics/physiology ; *Oncogenes ; Phosphoproteins/*genetics/physiology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 32
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-10-14
    Beschreibung: A survey of rat tissues by RNA analysis, aimed at uncovering the physiological function of the parathyroid hormone-like peptide (PTH-LP) associated with hypercalcemia of malignancy, revealed the presence of a 1.5-kilobase messenger RNA encoding this peptide in lactating mammary glands. PTH-LP messenger RNA is expressed in mammary tissue only during lactation; it appears and disappears rapidly (2 to 4 hours) as a function of the sucking stimulus. The identity of this messenger RNA was confirmed by cloning the rat PTH-LP complementary DNA, which predicts a peptide with strong similarity to the human homolog. Moreover, extracts from lactating mammary tissue stimulated parathyroid hormone-dependent adenylate cyclase. These findings suggest that PTH-LP plays a physiological role in lactation, possibly as a hormone for the mobilization or transfer (or both) of calcium to the milk.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thiede, M A -- Rodan, G A -- New York, N.Y. -- Science. 1988 Oct 14;242(4876):278-80.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Bone Biology and Osteoporosis Research, Merck Sharp & Dohme Research Laboratories, West Point, PA 19486.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3175653" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adenylyl Cyclases/metabolism ; Amino Acid Sequence ; Animals ; Base Sequence ; Calcium/*metabolism ; Cloning, Molecular ; DNA/genetics ; Female ; *Gene Expression Regulation ; Humans ; Lactation/*metabolism ; Mammary Glands, Animal/*metabolism ; Molecular Sequence Data ; Neoplasm Proteins/*genetics/physiology ; Parathyroid Hormone-Related Protein ; Pregnancy ; RNA, Messenger/genetics/*metabolism ; Rats ; Sequence Homology, Nucleic Acid ; Tissue Distribution
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 33
    Publikationsdatum: 1988-04-15
    Beschreibung: Immunization with radiation-attenuated malaria sporozoites induces potent cellular immune responses, but the target antigens are unknown and have not previously been elicited by subunit vaccines prepared from the circumsporozoite (CS) protein. A method is described here for inducing protective cell-mediated immunity to sporozoites by immunization with attenuated Salmonella typhimurium transformed with the Plasmodium berghei CS gene. These transformants constitutively express CS antigens and, when used to immunize mice orally, colonize the liver, induce antigen-specific cell-mediated immunity, and protect mice against sporozoite challenge in the absence of antisporozoite antibodies. These data indicate that the CS protein contains T cell epitopes capable of inducing protective cell-mediated immunity, and emphasize the importance of proper antigen presentation in generating this response. Analogous, orally administered vaccines against human malaria might be feasible.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sadoff, J C -- Ballou, W R -- Baron, L S -- Majarian, W R -- Brey, R N -- Hockmeyer, W T -- Young, J F -- Cryz, S J -- Ou, J -- Lowell, G H -- New York, N.Y. -- Science. 1988 Apr 15;240(4850):336-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Bacterial Diseases, Walter Reed Army Institute of Research, Washington, DC 20307-5100.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3281260" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Antigens, Surface/*immunology ; Bacterial Vaccines/*immunology ; Female ; Liver/microbiology ; Malaria/*immunology/prevention & control ; Mice ; Mice, Inbred BALB C ; Plasmids ; Plasmodium berghei/*immunology ; *Protozoan Proteins ; Salmonella typhimurium/genetics/*immunology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 34
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-10-07
    Beschreibung: In the adult mammalian visual system, ganglion cell axons from the two eyes are segregated from each other into separate layers within their principal target, the lateral geniculate nucleus. The involvement of spontaneously generated action potential activity in the process of segregation was investigated during the fetal period in which segregation normally occurs in the cat, between embryonic day 45 (E45) and birth (E65). Tetrodotoxin, which blocks the voltage-sensitive sodium channel, was used to prevent action potentials. Fetuses received continuous intracranial infusions of tetrodotoxin from osmotic minipumps implanted in utero on E42. After a 2-week infusion, intraocular injections of anterograde tracers revealed that tetrodotoxin prevented segregation. The contralateral projection filled the lateral geniculate nucleus uniformly, and the ipsilateral projection expanded to occupy most of what would normally be contralaterally innervated layer A. Thus, in the fetus, long before the onset of vision, spontaneous action potential activity is likely to be present in the visual system and to contribute to the segregation of the retinogeniculate pathway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shatz, C J -- Stryker, M P -- EY 02874/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1988 Oct 7;242(4875):87-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiology, Stanford University School of Medicine, CA 94305.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3175636" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Afferent Pathways/drug effects/*embryology ; Animals ; Cats ; Female ; Fetus ; Infusions, Parenteral ; Optic Chiasm/drug effects/*embryology ; Pregnancy ; Reference Values ; Tetrodotoxin/administration & dosage/*pharmacology ; Visual Pathways/drug effects/*embryology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 35
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-11-11
    Beschreibung: Despite its potential toxicity, H2O2 is used as an extracellular oxidant by Stronglylocentrotus purpuratus eggs to cross-link their fertilization envelopes. These eggs contain 5 mM 1-methyl-N alpha,N alpha-dimethyl-4-mercaptohistidine (ovothiol C), which reacts with H2O2. In consuming H2O2 and being reduced by glutathione, ovothiol acts as a glutathione peroxidase and replaces the function of the enzyme in eggs. The ovothiol system is more effective than egg catalase in destroying H2O2 at concentrations produced during fertilization and constitutes a principal mechanism for preventing oxidative damage at fertilization.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Turner, E -- Hager, L J -- Shapiro, B M -- GM23910/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1988 Nov 11;242(4880):939-41.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, University of Washington, Seattle 98195.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3187533" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acids, Sulfur/*metabolism ; Animals ; Catalase/metabolism ; Disulfides/metabolism ; Female ; Fertilization ; Glutathione/metabolism ; Glutathione Peroxidase/*metabolism ; Kinetics ; *Methylhistidines ; NADP/metabolism ; Ovum/*metabolism ; Oxidation-Reduction ; Sea Urchins
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 36
    Publikationsdatum: 1988-12-16
    Beschreibung: Human T cell leukemia viruses (HTLV-I and HTLV-II) can infect many cell types in vitro. HTLV-I and HTLV-II use the same cell surface receptor, as shown by interference with syncytium formation and with infection by vesicular stomatitis virus (VSV) pseudotypes bearing the HTLV envelope glycoproteins. Human-mouse somatic cell hybrids were used to determine which human chromosome was required to confer susceptibility to VSV(HTLV) infection. The only human chromosome common to all susceptible cell hybrids was chromosome 17, and the receptor gene was localized to 17cen-qter. Antibodies to surface antigens known to be determined by genes on 17q did not block the HTLV receptor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sommerfelt, M A -- Williams, B P -- Clapham, P R -- Solomon, E -- Goodfellow, P N -- Weiss, R A -- New York, N.Y. -- Science. 1988 Dec 16;242(4885):1557-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Chester Beatty Laboratories, Institute of Cancer Research, London, U.K.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3201246" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Cattle ; Cell Line ; Chromosome Mapping ; *Chromosomes, Human, Pair 17 ; Cricetinae ; *Genes ; Human T-lymphotropic virus 1/*physiology ; Human T-lymphotropic virus 2/*physiology ; Humans ; Hybrid Cells/cytology/microbiology ; Mice ; Rats ; Receptors, Virus/*genetics
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 37
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-06-17
    Beschreibung: A two-locus genetic model is studied in which one locus controls the tendency of individuals to act altruistically toward siblings and the other locus controls the mating habits of females. It is demonstrated that genetic variation at the altruism locus is often sufficient to induce an increase in the frequency of genes that cause females to produce all of their offspring with a single mate. This occurs because of nonrandom associations that develop between genes that cause altruism and those that affect female mating behavior. The results provide a new explanation for the evolution of monogamy, and they suggest a previously unexplored mechanism for the evolution of a variety of other behavioral traits as well.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peck, J R -- Feldman, M W -- GM 10452/GM/NIGMS NIH HHS/ -- GM 28016/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1988 Jun 17;240(4859):1672-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, Stanford University, CA 94305.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3381088" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Altruism ; Animals ; *Biological Evolution ; Female ; Genotype ; Humans ; Male ; Mathematics ; Polymorphism, Genetic ; Recombination, Genetic ; *Sexual Behavior, Animal ; *Sibling Relations
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 38
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-04-15
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roberts, L -- New York, N.Y. -- Science. 1988 Apr 15;240(4850):282-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3162618" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Cystic Fibrosis/*genetics ; *Genes ; Genetic Markers ; Humans
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 39
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-09-23
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roberts, L -- New York, N.Y. -- Science. 1988 Sep 23;241(4873):1596.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3420412" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Base Sequence ; Chromosome Mapping/economics ; *Genes ; *Government Agencies ; Humans ; National Institutes of Health (U.S.) ; Research Support as Topic/*legislation & jurisprudence ; United States
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 40
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-09-02
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roberts, L -- New York, N.Y. -- Science. 1988 Sep 2;241(4870):1164.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3413481" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Abortion, Induced ; *Ethics, Medical ; Female ; *Fetus ; Humans ; *Legislation, Medical ; National Institutes of Health (U.S.) ; Pregnancy ; United States
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 41
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-06-17
    Beschreibung: Angiotensin II (Ang II) is present in high concentrations in preovulatory follicular fluid, and ovarian follicular cells have specific Ang II receptors. To investigate the possible direct involvement of Ang II in ovulation the specific receptor antagonist of Ang II, saralasin, was administered by intraperitoneal injection to immature rats in which follide development and ovulation had been induced with pregnant mare serum gonadotrophin (PMSG) and human chorionic gonadotrophin (hCG), respectively. Saralasin halved the number of oocytes found in the fallopian tubes 17 to 20 hours after administration of hCG. The antiovulatory effect was observed when saralasin was given 1 hour before hCG or 1 or 3 hours after hCG but not when given 5 hours after hCG. Simultaneous administration of Ang II reversed the saralasin blockage of ovulation. These results indicate a direct, obligate role for Ang II in ovulation and raise the possibility of contraceptive and profertility applications for agonists or antagonists of the renin-angiotensin system that are aimed at the ovulatory process.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pellicer, A -- Palumbo, A -- DeCherney, A H -- Naftolin, F -- HD22970/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1988 Jun 17;240(4859):1660-1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Obstetrics and Gynecology, Yale University School of Medicine, New Haven, CT 06510.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3381087" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Angiotensin II/antagonists & inhibitors/*physiology ; Animals ; Cell Count ; Chorionic Gonadotropin/pharmacology ; Fallopian Tubes/cytology ; Female ; Gonadotropins, Equine/pharmacology ; Oocytes/cytology ; Ovulation/*drug effects ; Rats ; Rats, Inbred Strains ; Saralasin/*pharmacology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 42
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-06-03
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roberts, L -- New York, N.Y. -- Science. 1988 Jun 3;240(4857):1266.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3375813" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Administrative Personnel ; *Base Sequence ; *Chromosomes, Human ; *Genes ; Humans ; Research Support as Topic
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 43
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-12-16
    Beschreibung: A sequence of developmental events transforms neurons from their immature state to their mature, terminally differentiated state. The elav locus is one of the first examples of a gene that is expressed in neurons early during this developmental sequence. This gene has been shown to be required for the proper development of young neurons and for the maintenance of mature neurons. DNA sequence data presented in this report suggest that the elav gene product is an RNA binding protein, based on the presence of RNP (ribonucleoprotein) consensus sequences. This leads to the proposal that this protein is involved in the RNA metabolism of neurons.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Robinow, S -- Campos, A R -- Yao, K M -- White, K -- GM-33205/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1988 Dec 16;242(4885):1570-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Brandeis University, Waltham, MA 02254-9110.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3144044" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Animals ; Base Sequence ; Carrier Proteins/*genetics/physiology ; Drosophila melanogaster/*genetics ; *Genes ; Molecular Sequence Data ; Neurons/*physiology ; RNA-Binding Proteins
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 44
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-02-05
    Beschreibung: The epidemic of infection with the human immunodeficiency virus (HIV) and the acquired immunodeficiency syndrome (AIDS) poses a major ethical question: How can we control the epidemic and the harm that it causes without unjustly discriminating against particular social groups and without unnecessarily infringing on the freedom of individuals? This question pertains to three spheres of public policy in the United States: public health, the delivery of health care, and research. In the public health sphere, vigorous educational efforts will be required, as will modified approaches to intravenous drug use, prostitution, and homosexual and bisexual sexual activity. Carefully targeted, voluntary testing and screening programs should be coupled with counseling and with guarantees of confidentiality and nondiscrimination where these are appropriate. Both health care workers and the health care system have a moral obligation to provide care to people with HIV infection, but heroic self-sacrifice should not be required provided that infection control precautions are observed. Patients with neurological involvement and terminally ill patients will benefit from statutes allowing recognition of advance directives about preferred modes of care or nontreatment. There is a moral imperative to perform intensive research directed toward the understanding, treatment, and prevention of HIV infection and AIDS. The research process will raise challenging ethical questions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Walters, L -- New York, N.Y. -- Science. 1988 Feb 5;239(4840):597-603.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Bioethics, Kennedy Institute of Ethics, Washington, DC 20057.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3340846" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Acquired Immunodeficiency Syndrome/*prevention & control/therapy ; Adult ; Beneficence ; Biomedical Research ; Bisexuality ; Brain Diseases ; Delivery of Health Care ; *Ethics, Medical ; Female ; Government Regulation ; Health Education ; Health Policy ; Homosexuality ; Humans ; Male ; Mandatory Programs ; *Moral Obligations ; Personal Autonomy ; Resource Allocation ; Risk Assessment ; Social Justice ; Substance-Related Disorders ; United States ; *Voluntary Programs
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 45
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-05-06
    Beschreibung: In many bird species, those pairs that breed earlier in the season have higher reproductive success than those that breed later. Since breeding date is known to be heritable, it is unclear why it does not evolve to an earlier time. Under assumptions outlined by Fisher, a model is developed that shows how breeding date may have considerable additive genetic variance, appear to be under directional selection, and yet not evolve. These results provide a general explanation for a persistent correlation of fitness with a variety of traits in natural populations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Price, T -- Kirkpatrick, M -- Arnold, S J -- 1R01GM3549201/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1988 May 6;240(4853):798-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University of California, San Diego, La Jolla 92093.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3363360" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; *Biological Evolution ; Birds/*physiology ; Female ; Fertility ; Genetic Variation ; Nutritional Status ; *Reproduction ; *Seasons ; *Selection, Genetic ; Time Factors
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 46
    Publikationsdatum: 1988-09-30
    Beschreibung: Control of growth and differentiation during mammalian embryogenesis may be regulated by growth factors from embryonic or maternal sources. With the use of single-cell messenger RNA phenotyping, the simultaneous expression of growth factor transcripts in single or small numbers of preimplantation mouse embryos was examined. Transcripts for platelet-derived growth factor A chain (PDGF-A), transforming growth factor (TGF)-alpha, and TGF-beta 1, but not for four other growth factors, were found in whole blastocysts. TGF-alpha, TGF-beta 1, and PDGF antigens were detected in blastocysts by immunocytochemistry. Both PDGF-A and TGF-alpha were detected as maternal transcripts in the unfertilized ovulated oocyte, and again in blastocysts. TGF-beta 1 transcripts appeared only after fertilization. The expression of a subset of growth factors in mouse blastocysts suggests a role for these factors in the growth and differentiation of early mammalian embryos.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rappolee, D A -- Brenner, C A -- Schultz, R -- Mark, D -- Werb, Z -- 5T32 ES07106/ES/NIEHS NIH HHS/ -- HD22681/HD/NICHD NIH HHS/ -- HD23539/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1988 Sep 30;241(4874):1823-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Radiobiology and Environmental Health, University of California, San Francisco 94143-0750.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3175624" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Blastocyst/*physiology ; Cleavage Stage, Ovum/physiology ; Embryonic Development ; Female ; Gene Expression Regulation ; Growth Substances/*genetics ; Mice ; Oocytes/physiology ; Platelet-Derived Growth Factor/*genetics ; Pregnancy ; RNA, Messenger/genetics ; Transcription, Genetic ; Transforming Growth Factors/*genetics
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 47
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-11-25
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roberts, L -- New York, N.Y. -- Science. 1988 Nov 25;242(4882):1123.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3187540" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Base Sequence ; *Budgets ; *Chromosomes, Human ; *Financial Management ; *Genes ; Humans ; National Institutes of Health (U.S.) ; United States
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 48
    Publikationsdatum: 1988-03-11
    Beschreibung: The alterations in morphology and function of the ovarian follicle as it matures, ovulates, and becomes a corpus luteum are dramatic. A variety of steroid and polypeptide hormones influence these processes, and the ovary in turn produces specific hormonal signals for endocrine regulation. One such signal is inhibin, a heterodimeric protein that suppresses the secretion of follicle-stimulating hormone from pituitary gonadotrophs. Rat inhibin complementary DNA probes have been used to examine the levels and distribution of inhibin alpha-and beta A-subunit messenger RNAs in the ovaries of cycling animals. Striking, dynamic changes have been found in inhibin messenger RNA accumulation during the developmental maturation of the ovarian follicle.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Woodruff, T K -- D'Agostino, J -- Schwartz, N B -- Mayo, K E -- HD07504/HD/NICHD NIH HHS/ -- HD21921/HD/NICHD NIH HHS/ -- P01 HD021921/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1988 Mar 11;239(4845):1296-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, Molecular Biology and Cell Biology, Northwestern University, Evanston, IL 60208.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3125611" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; *Estrus ; Female ; Follicle Stimulating Hormone/blood ; Inhibins/*genetics ; Luteinizing Hormone/blood ; Macromolecular Substances ; Nucleic Acid Hybridization ; Ovarian Follicle/*physiology ; Ovary/physiology ; RNA, Messenger/*genetics/metabolism ; Rats
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 49
    Publikationsdatum: 1986-12-19
    Beschreibung: A strain of pigs bearing three immunogenetically defined lipoprotein-associated markers (allotypes), designated Lpb5, Lpr1, and Lpu1, has marked hypercholesterolemia on a low fat, cholesterol-free diet. Unlike individuals with familial hypercholesterolemia or WHHL rabbits, the affected pigs have normal low density lipoprotein receptor activity. The animals, by 7 months of age, have extensive atherosclerotic lesions in all three coronary arteries. This strain of pig represents an animal model for atherosclerosis and hypercholesterolemia associated with mutations affecting the structures of plasma lipoproteins. One of the variant apolipoproteins, Lpb5, is apolipoprotein-B. A second variant apolipoprotein (Lpr1), termed apo-R, is a 23-kilodalton protein present in both the very low density (d less than 1.006 g/ml) and the very high density (d greater than 1.21 g/ml) fractions of pig plasma. Isoforms of this protein correlate with two Lpr alleles, Lpr1 and Lpr2. The Lpr genes segregate independently of the Lpb5 and Lpu1 alleles. The Lpu1 allotype is a component of low density lipoprotein and is genetically linked to Lpb5.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rapacz, J -- Hasler-Rapacz, J -- Taylor, K M -- Checovich, W J -- Attie, A D -- AG05-856/AG/NIA NIH HHS/ -- HL30594/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1986 Dec 19;234(4783):1573-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3787263" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Alleles ; Animals ; Apolipoproteins B/genetics ; Arteriosclerosis/blood/*genetics ; Cholesterol/blood ; *Disease Models, Animal ; Female ; Genotype ; Hypercholesterolemia/blood/*genetics ; Immunologic Tests ; Lipoproteins/blood/*genetics ; Lipoproteins, LDL/blood/genetics ; Lipoproteins, VLDL/blood/genetics ; Male ; Mutation ; Receptors, LDL/metabolism ; Swine
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 50
    Publikationsdatum: 1986-05-02
    Beschreibung: The development of simultaneous resistance to multiple structurally unrelated drugs is a major impediment to cancer chemotherapy. Multidrug resistance in human KB carcinoma cells selected in colchicine, vinblastine, or Adriamycin is associated with amplification of specific DNA sequences (the multidrug resistance locus, mdr1). During colchicine selection resistance is initially accompanied by elevated expression of a 4.5-kilobase mdr1 messenger RNA (mRNA) without amplification of the corresponding genomic sequences. During selection for increased levels of resistance, expression of this mRNA is increased simultaneously with amplification of mdr1 DNA. Increased expression and amplification of mdr1 sequences were also found in multidrug-resistant sublines of human leukemia and ovarian carcinoma cells. These results suggest that increased expression of mdr1 mRNA is a common mechanism for multidrug resistance in human cells. Activation of the mdr1 gene by mutations or epigenetic changes may precede its amplification during the development of resistance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shen, D W -- Fojo, A -- Chin, J E -- Roninson, I B -- Richert, N -- Pastan, I -- Gottesman, M M -- New York, N.Y. -- Science. 1986 May 2;232(4750):643-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3457471" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Cell Line ; Colchicine/pharmacology ; Cricetinae ; Cricetulus ; DNA, Neoplasm/genetics ; Doxorubicin/pharmacology ; *Drug Resistance ; Female ; *Gene Amplification ; Humans ; Leukemia, Lymphoid/drug therapy ; Neoplasms/*drug therapy/genetics ; Nucleic Acid Hybridization ; Ovarian Neoplasms/drug therapy ; RNA, Messenger/genetics ; Vinblastine/pharmacology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 51
    Publikationsdatum: 1986-04-25
    Beschreibung: The Syrian cardiomyopathic hamster has a hereditary disease in which a progressive myocardial necrosis mimics human forms of cardiac hypertrophy. Lesions are associated with calcium overload and can be prevented with the calcium antagonist verapamil. Numbers of receptor binding sites for calcium antagonists in heart, brain, skeletal muscle, and smooth muscle were markedly increased in cardiomyopathic hamsters. The uptake of calcium-45 into brain synaptosomes was also increased in cardiomyopathic hamsters. The increase in calcium antagonist receptors and related voltage-sensitive calcium channels may be involved in the pathogenesis of this cardiomyopathy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wagner, J A -- Reynolds, I J -- Weisman, H F -- Dudeck, P -- Weisfeldt, M L -- Snyder, S H -- HL-17655/HL/NHLBI NIH HHS/ -- MH-18501/MH/NIMH NIH HHS/ -- NS-16375/NS/NINDS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1986 Apr 25;232(4749):515-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3008330" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Brain/metabolism/physiopathology ; *Brain Chemistry ; Calcium/metabolism ; Calcium Channels ; Cardiomyopathy, Hypertrophic/*physiopathology ; Cricetinae ; Disease Models, Animal ; Female ; Heart/physiopathology ; Male ; Mesocricetus ; Muscle, Smooth/analysis/metabolism ; Muscles/*analysis/metabolism/physiopathology ; Myocardium/*analysis/metabolism ; Nifedipine/analogs & derivatives/metabolism ; Nitrendipine ; Receptors, Nicotinic/*analysis/metabolism/physiology ; Synaptosomes/metabolism ; Verapamil/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 52
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1986-10-31
    Beschreibung: From the postwar high of 3.8 births per woman at the peak of the baby boom, the total fertility rate in the United States has fallen to 1.8, where it has remained unchanged for nearly a decade. This below-replacement level of fertility has, in recent decades, characterized most Western countries, some of which have shown declines to well below 1.5 births per woman. Were it not for the continued infusion of immigrants, the U.S. population, which already shows the aging characteristic of low fertility, would stop growing and begin to decline before the middle of the next century. The low fertility in the United States has been accomplished by a postponement of marriage and by the widespread use of contraception, with heavy reliance on surgical sterilization as a contraceptive method. Judging from the experience of other Western countries and from our own historical experience of two centuries of fertility decline interrupted only by the baby boom, as well as from the absence of social trends that would counteract those contributing to that decline, the prognosis is for a continued low level of fertility in the United States.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Westoff, C F -- New York, N.Y. -- Science. 1986 Oct 31;234(4776):554-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3532324" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adolescent ; Adult ; *Birth Rate ; Contraception/history ; Ethnic Groups ; Female ; Fertility ; Forecasting ; History, 20th Century ; Humans ; Population Dynamics ; Population Growth ; Pregnancy ; Pregnancy in Adolescence ; United States
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 53
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1986-02-21
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wilson, M A -- New York, N.Y. -- Science. 1986 Feb 21;231(4740):783.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3945808" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Family Planning Services ; Female ; Humans ; Ovulation
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 54
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1987-07-24
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Booth, W -- New York, N.Y. -- Science. 1987 Jul 24;237(4813):355-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2885919" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Acquired Immunodeficiency Syndrome/*transmission ; Animals ; *Culicidae ; DNA Replication ; Female ; HIV/genetics ; Humans ; Insect Bites and Stings ; Insect Vectors ; Male ; Virus Replication
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 55
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1987-10-09
    Beschreibung: In sharp contrast with the experiences of all other industrialized nations, the size of the labor force of the United States is growing rapidly while, simultaneously, its age, gender, and ethnic composition are changing markedly. Consequently, human resource issues present an unprecedented challenge in the nation's quest to achieve a fully employed and equitable society. New public policies that focus on labor market adjustment policies will be required if these developments are to be a boon rather than a bane to the emerging postindustrial economy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Briggs, V M Jr -- New York, N.Y. -- Science. 1987 Oct 9;238(4824):176-80.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉New York State School of Industrial and Labor Relations, Cornell University, Ithaca 14851.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3659908" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adult ; Age Factors ; Australia ; Canada ; Emigration and Immigration ; *Employment ; Europe ; Female ; Humans ; Japan ; Male ; *Population ; Unemployment ; United States
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 56
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1987-05-22
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barnes, D M -- New York, N.Y. -- Science. 1987 May 22;236(4804):915.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3576209" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Female ; Humans ; Menopause ; Middle Aged ; Osteoblasts/*physiology ; Osteoporosis/*etiology/physiopathology ; Receptors, Estrogen/physiology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 57
    Publikationsdatum: 1987-10-23
    Beschreibung: Exposure to bacterial endotoxins has long been known to stimulate the release of anterior pituitary hormones; administration of endotoxin was at one time a common clinical test of anterior pituitary function. Endotoxin is a potent stimulus for production of the endogenous pyrogenic protein, interleukin-1 (IL-1), by macrophages and monocytes. The possibility that IL-1 has a direct effect on the secretion of hormones by rat pituitary cells in a monolayer culture was investigated. Recombinant human IL-1 beta stimulated the secretion of adrenocorticotropic hormone, luteinizing hormone, growth hormone, and thyroid-stimulating hormone. Increased hormone secretion into culture supernatants was found with IL-1 concentrations ranging from 10(-9) M to 10(-12) M. Prolactin secretion by the monolayers was inhibited by similar doses. These concentrations of IL-1 are within the range reported for IL-1 in serum, suggesting that IL-1 generated peripherally by mononuclear immune cells may act directly on anterior pituitary cells to modulate hormone secretion in vivo. Incubation of IL-1 solutions with antibody to IL-1 neutralized these actions. These pituitary effects of IL-1 suggest that this monokine may be an important regulator of the metabolic adaptations to infectious stressors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bernton, E W -- Beach, J E -- Holaday, J W -- Smallridge, R C -- Fein, H G -- New York, N.Y. -- Science. 1987 Oct 23;238(4826):519-21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Neuropsychiatry, Walter Reed Army Institute of Research, Washington, D.C. 20307-5100.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2821620" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Adrenocorticotropic Hormone/secretion ; Animals ; Cells, Cultured ; Dinoprostone ; Female ; Growth Hormone/secretion ; Humans ; Infection/physiopathology ; Inflammation/physiopathology ; Interleukin-1/*physiology ; Luteinizing Hormone/secretion ; Pituitary Gland, Anterior/*secretion ; Pituitary Hormones, Anterior/*secretion ; Prolactin/secretion ; Prostaglandins E/secretion ; Rats ; Rats, Inbred Strains ; Recombinant Proteins/pharmacology ; Thyrotropin/secretion
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 58
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1987-11-06
    Beschreibung: The c-erbA gene belongs to a multigene family that encodes transcriptional regulatory proteins including the v-erbA oncogene product, steroid hormone receptors, and the vitamin D3 receptor. A v-erbA DNA probe encoding the DNA-binding region of the v-erbA protein was used to screen a human complementary DNA testis library. One of the clones isolated, erbA-T-1, was found to encode a 490-amino acid protein (erbA-T). The erbA-T polypeptide shows high homology with the proteins encoded by both the chicken c-erbA and the human c-erbA-beta genes but is most closely related to the chicken gene. The chicken c-erbA and the human c-erbA-beta genes encode high-affinity receptors for thyroid hormone, and here it is shown that the erbA-T protein binds specifically to 3,5,3'-triiodo-L-thyronine with a dissociation constant of 3.8 +/- 0.2 x 10(-10) M. These data imply that more than one thyroid hormone receptor exists in humans and that these receptors might have different tissue- and gene-activating specificities.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Benbrook, D -- Pfahl, M -- DK-35083/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1987 Nov 6;238(4828):788-91.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cancer Research Center, La Jolla Cancer Research Foundation, CA 92037.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3672126" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; *Cloning, Molecular ; DNA/*metabolism ; *Genes ; Humans ; Kinetics ; Male ; Protein Biosynthesis ; *Proto-Oncogenes ; Receptors, Thyroid Hormone/*genetics/metabolism ; Testis/*metabolism ; Transcription, Genetic
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 59
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1987-12-04
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dunn, A J -- Powell, M L -- Gaskin, J M -- MH25486/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1987 Dec 4;238(4832):1423-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neuroscience, College of Medicine, University of Florida, Gainesville 32610.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3685987" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Corticosterone/*blood ; Female ; Hypophysectomy ; Lymphocytes/physiology ; Male ; Mice ; Mice, Inbred Strains ; Models, Biological ; Newcastle Disease/*blood ; Pituitary-Adrenal System/*physiopathology ; Postoperative Complications/blood ; Stress, Physiological/blood
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 60
    Publikationsdatum: 1987-10-09
    Beschreibung: Oncogenes encoding serine/threonine or tyrosine kinases were introduced into the established rodent fibroblast cell line NIH 3T3 and tested for tumorigenic and metastatic behavior in T cell-deficient nude mice. Transforming oncogenes of the ras family were capable of converting fibroblast cell lines to fully metastatic tumors. Cell lines transformed by the kinase oncogenes mos, raf, src, fes, and fms formed experimental metastases and (in some cases) these genes were more efficient at metastatic conversion than a mutant ras gene. In contrast, cells transformed by either of two nuclear oncogenes, myc or p53, were tumorigenic when injected subcutaneously but were virtually nonmetastatic after intravenous injection. These data demonstrate that, in addition to ras, a structurally divergent group of kinase oncogenes can induce the metastatic phenotype.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Egan, S E -- Wright, J A -- Jarolim, L -- Yanagihara, K -- Bassin, R H -- Greenberg, A H -- New York, N.Y. -- Science. 1987 Oct 9;238(4824):202-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Manitoba Institute of Cell Biology, University of Manitoba, Winnipeg, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3659911" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; *Cell Transformation, Neoplastic ; Cells, Cultured ; *Genes ; Mice ; *Neoplasm Metastasis ; *Oncogenes ; Phenotype ; Protein Kinases/*genetics
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 61
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1987-06-26
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Counts, C L 3rd -- New York, N.Y. -- Science. 1987 Jun 26;236(4809):1613.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3474781" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Base Sequence ; *Chromosomes, Human ; *Genes ; Genetic Engineering ; Humans
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 62
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1987-03-27
    Beschreibung: The earliest known response of eggs to sperm in many species is a change in egg membrane potential. However, for no species is it known what components of the sperm cause the opening of the egg plasma membrane channels. Protein isolated from sperm acrosomal granules of the marine worm Urechis caused electrical responses in oocytes with the same form, amplitude, and ion dependence as the fertilization potentials induced by living sperm. Sperm initiated fertilization potentials in oocytes when sperm-oocyte fusion, but not binding, was inhibited by clamping oocyte membrane potentials to positive values. Acrosomal protein also initiated electrical responses in clamped oocytes. These results support the hypothesis that it is the sperm acrosomal protein that opens ion channels in the oocyte membrane.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gould, M -- Stephano, J L -- New York, N.Y. -- Science. 1987 Mar 27;235(4796):1654-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3823908" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Acrosome/*physiology ; Action Potentials ; Animals ; Annelida ; Calcium/metabolism ; Carrier Proteins/isolation & purification/*pharmacology ; Electric Stimulation ; Electrophysiology ; Female ; Fertilization ; Male ; Sodium/metabolism ; *Sperm-Ovum Interactions ; Spermatozoa/*physiology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 63
    Publikationsdatum: 1987-10-09
    Beschreibung: An abnormal alpha 2-antiplasmin that is associated with a serious bleeding tendency has been found in a Dutch family and is referred to as alpha 2-antiplasmin Enschede. This abnormal alpha 2-antiplasmin is converted from an inhibitor of plasmin to a substrate. The molecular defect of alpha 2-antiplasmin Enschede, as revealed by sequencing of cloned genomic DNA fragments, consists of an alanine insertion near the active site region of the molecule. Substitution of this fragment into complementary DNA for a wild-type alpha 2-antiplasmin yields a translation product with physical and functional properties typical of the abnormal alpha 2-antiplasmin Enschede. The naturally occurring mutant may serve as a model for investigating the structures that determine the properties of an inhibitor versus those of a substrate in serine protease inhibitors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holmes, W E -- Lijnen, H R -- Nelles, L -- Kluft, C -- Nieuwenhuis, H K -- Rijken, D C -- Collen, D -- New York, N.Y. -- Science. 1987 Oct 9;238(4824):209-11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Thrombosis and Vascular Research, University of Leuven, Belgium.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2958938" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Base Sequence ; DNA/metabolism ; Fibrinolysin/*antagonists & inhibitors ; *Genes ; Humans ; Molecular Sequence Data ; *Mutation ; Protein Biosynthesis ; alpha-2-Antiplasmin/*genetics/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 64
    facet.materialart.
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1987-10-09
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holden, C -- New York, N.Y. -- Science. 1987 Oct 9;238(4824):158-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3659906" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Female ; Humans ; *Life Expectancy ; Male ; Sex Factors ; Sex Ratio
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    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 65
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1987-12-18
    Beschreibung: Growth factors and their receptors are involved in the regulation of cell proliferation and also play a key role in oncogenesis. In this study, a novel putative kinase receptor gene, termed eph, has been identified and characterized by molecular cloning. Its primary structure is similar to that of tyrosine kinase receptors thus far cloned and includes a cysteine-rich region in the extracellular domain. However, other features of the sequence distinguish the eph gene product from known receptors with tyrosine kinase activity. Thus the eph protein may define a new class of these molecules. The eph gene is overexpressed in several human carcinomas, suggesting that this gene may be involved in the neoplastic process of some tumors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hirai, H -- Maru, Y -- Hagiwara, K -- Nishida, J -- Takaku, F -- New York, N.Y. -- Science. 1987 Dec 18;238(4834):1717-20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Third Department of Internal Medicine, Faculty of Medicine, University of Tokyo, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2825356" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Base Sequence ; DNA Restriction Enzymes ; *Genes ; Humans ; Molecular Sequence Data ; Neoplasms/metabolism ; Oncogenes ; Protein-Tyrosine Kinases/metabolism ; Receptor, Epidermal Growth Factor/*genetics ; Transcription, Genetic
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 66
    Publikationsdatum: 1987-05-15
    Beschreibung: A new human T-lymphotropic virus (HTLV-4) was recently described in healthy people from Senegal. This virus has many properties in common with members of the human T-lymphotropic viruses, particularly the human immunodeficiency virus or HIV, the etiologic agent of acquired immune deficiency syndrome (AIDS), but does not appear to be associated with immunodeficiency-related disorders. In the present study, serum samples were obtained from 4248 individuals from six West African countries, including Senegal, Guinea, Guinea Bissau, Mauritania, Burkina Faso, and Ivory Coast. These samples, collected during 1985-1987, were from people categorized as healthy control, sexually active risk, and disease populations. All samples were analyzed for reactivity to HTLV-4 and HIV by radioimmunoprecipitation-sodium dodecyl sulfate-polyacrylamide gel electrophoresis and immunoblotting. Evidence for HTLV-4 infection was found in five of the six countries. The seroprevalence varied markedly from country to country. Healthy sexually active individuals in the risk category had the highest levels of HTLV-4 infection compared to individuals in the healthy control category and the disease category, the latter including AIDS patients. The seroprevalence of HIV infection in most of these countries was quite low, although tightly associated with the rare cases of AIDS. The biology of HTLV-4 infection thus differs from that of HIV in Central Africa or the United States and Europe. The presence of these viruses and their different pathogenicities in several countries of West Africa indicate the necessity for serologic assays that will distinguish between them. Further studies of their origin and distribution as well as of their biology will be important in advancing our understanding of AIDS.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kanki, P J -- M'Boup, S -- Ricard, D -- Barin, F -- Denis, F -- Boye, C -- Sangare, L -- Travers, K -- Albaum, M -- Marlink, R -- CA 18216/CA/NCI NIH HHS/ -- CA 37466/CA/NCI NIH HHS/ -- FOD 630/OD/NIH HHS/ -- New York, N.Y. -- Science. 1987 May 15;236(4803):827-31.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3033826" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Acquired Immunodeficiency Syndrome/epidemiology ; Adult ; Africa, Western ; Deltaretrovirus/*isolation & purification ; Demography ; Female ; HIV/*isolation & purification ; Humans ; Inpatients ; Male ; Pregnancy ; Prisoners ; Prostitution ; Reference Values ; Risk
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 67
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1987-03-13
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G -- New York, N.Y. -- Science. 1987 Mar 13;235(4794):1323.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3823884" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Base Sequence ; DNA/genetics ; Eye Neoplasms/*genetics ; *Genes ; Humans ; Retinoblastoma/*genetics
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    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 68
    Publikationsdatum: 1987-12-04
    Beschreibung: The inherited genetic defect in adenomatous polyposis has been localized to a small region on the long arm of chromosome 5. Sixteen DNA marker loci were used to construct a linkage map of the chromosome. When five kindreds segregating a gene for adenomatous polyposis coli were characterized with a number of the markers, significant linkage was found between one marker and the disease gene. Linkage analysis determined the location of the defective gene within a primary genetic map of chromosome 5.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Leppert, M -- Dobbs, M -- Scambler, P -- O'Connell, P -- Nakamura, Y -- Stauffer, D -- Woodward, S -- Burt, R -- Hughes, J -- Gardner, E -- CA40641/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1987 Dec 4;238(4832):1411-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Human Genetics, University of Utah Medical Center, Salt Lake City 84132.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3479843" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Chromosome Mapping ; *Chromosomes, Human, Pair 5 ; Colonic Polyps/*genetics ; Female ; Gardner Syndrome/genetics ; *Genes ; Genetic Markers ; Humans ; Lod Score ; Male ; Neoplasms, Multiple Primary/*genetics
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 69
    Publikationsdatum: 1987-08-14
    Beschreibung: Foreign DNA was successfully introduced into the germline of the African mosquito vector of malaria Anopheles gambiae. Stable integration of genes into the germlines of insects had been achieved previously only in Drosophila melanogaster and related species and required the use of the P element transposon. In these experiments with Anopheles gambiae, the plasmid pUChsneo was used, which contains the selectable marker neo gene flanked by P element inverted repeats. Mosquitoes injected with this plasmid were screened for resistance to the neomycin analog G-418. A single event of plasmid insertion was recovered. Integration appears to be stable and, thus far, resistance to G-418 has been expressed for eight generations. The transformation event appears to be independent of P.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Miller, L H -- Sakai, R K -- Romans, P -- Gwadz, R W -- Kantoff, P -- Coon, H G -- New York, N.Y. -- Science. 1987 Aug 14;237(4816):779-81.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3039658" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Anopheles/embryology/*genetics ; DNA Transposable Elements ; DNA, Bacterial/genetics ; Drosophila melanogaster/genetics ; Drug Resistance/genetics ; Female ; *Genes, Bacterial ; Gentamicins/pharmacology ; Male ; Microinjections ; Plasmids ; *Transformation, Genetic
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 70
    Publikationsdatum: 1987-12-11
    Beschreibung: A new human retrovirus was isolated from a continuous cell line derived from a patient with CD4+ Tac- cutaneous T cell lymphoma/leukemia. This virus is related to but distinct from human T cell leukemia/lymphoma virus types I and II (HTLV-I and HTLV-II) and human immunodeficiency virus (HIV-1). With the use of a fragment of provirus cloned from one patient with T cell leukemia, closely related sequences were found in DNA of the cell line and of tumor cells from seven other patients with the same disease; these sequences were only distantly related to HTLV-I. The phenotype of the cells and the clinical course of the disease were clearly distinguishable from leukemia associated with HTLV-I. All patients and the wife of one patient showed a weak serological cross-reactivity with both HTLV-I and HIV-1 antigens. None of the patients proved to be at any apparent risk for HIV-1 infection. The name proposed for this virus is HTLV-V, and the date indicate that it may be a primary etiological factor in the major group of cutaneous T cell lymphomas/leukemias, including the sporadic lymphomas known as mycoses fungoides.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Manzari, V -- Gismondi, A -- Barillari, G -- Morrone, S -- Modesti, A -- Albonici, L -- De Marchis, L -- Fazio, V -- Gradilone, A -- Zani, M -- New York, N.Y. -- Science. 1987 Dec 11;238(4833):1581-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Dipartimento di Medicina Sperimentale e Scienze Biochimiche II, Universita di Roma, Tor Vergata, Italy.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2825353" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Antigens, Viral/analysis ; Deltaretrovirus/classification/*isolation & purification/ultrastructure ; Female ; Humans ; Leukemia/*microbiology ; Lymphoma/*microbiology ; Male ; Microscopy, Electron ; T-Lymphocytes/cytology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 71
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1987-11-06
    Beschreibung: Application of molecular biology, by means of linkage analysis and DNA probes that demonstrate restriction fragment length polymorphisms (RFLPs), has resulted in the chromosomal localization of the genes responsible for a number of neurological disorders. Characterization of the structure and function of individual genes for these diseases is in an early stage, but information available indicates that the molecular mechanisms underlying phenotypic expression of neurological diseases encompass a wide range of genetic errors ranging from the most minor (a single-base pair mutation) to large chromosomal deletions. Linkage analysis can now be used for genetic counseling in several of these disorders.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Martin, J B -- NS 16367/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1987 Nov 6;238(4828):765-72.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Neurology Service, Massachusetts General Hospital, Boston.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2890208" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Chromosome Mapping ; Chromosomes, Human ; *Genes ; Genetic Diseases, Inborn/*genetics ; Genetic Linkage ; Humans ; Polymorphism, Restriction Fragment Length
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 72
    Publikationsdatum: 1987-01-09
    Beschreibung: In Xuan Wei County, Yunnan Province, lung cancer mortality is among China's highest and, especially in females, is more closely associated with indoor burning of "smoky" coal, as opposed to wood or "smokeless" coal, than with tobacco smoking. Indoor air samples were collected during the burning of all three fuels. In contrast to wood and smokeless coal emissions, smoky coal emission has high concentrations of submicron particles containing mutagenic organics, especially in aromatic and polar fractions. These studies suggested an etiologic link between domestic smoky coal burning and lung cancer in Xuan Wei.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mumford, J L -- He, X Z -- Chapman, R S -- Cao, S R -- Harris, D B -- Li, X M -- Xian, Y L -- Jiang, W Z -- Xu, C W -- Chuang, J C -- New York, N.Y. -- Science. 1987 Jan 9;235(4785):217-20.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3798109" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): China ; *Coal ; Female ; Humans ; Male ; Neoplasms/etiology/*mortality ; Polycyclic Compounds/analysis ; Smoke/*adverse effects/analysis ; Wood
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 73
    Publikationsdatum: 1987-05-15
    Beschreibung: Antibody-producing cells display a special form of regulation whereby each cell produces immunoglobulin from only one of its two sets of antibody genes. This phenomenon, called allelic exclusion, is thought to be mediated by the product of one heavy chain allele restricting the expression of the other. Heavy chains are synthesized in two molecular forms, secreted and membrane bound. In order to determine whether it is specifically the membrane-bound form of the immunoglobulin M (IgM) heavy chain (mu) that mediates this regulation, transgenic mice were created that carry a human mu chain gene altered so that it can only direct the synthesis of the membrane-bound protein. The membrane-bound form of the human mu chain was made by most of the B cells in these animals as measured by assays of messenger RNA and surface immunoglobulins. Further, the many B cells that express the human gene do not express endogenous mouse IgM, and the few B cells that express endogenous mouse mu do not express the transgene. Thus, the membrane-bound form of the mu chain is sufficient to mediate allelic exclusion. In addition, the molecular structures recognized for this purpose are conserved between human and mouse systems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nussenzweig, M C -- Shaw, A C -- Sinn, E -- Danner, D B -- Holmes, K L -- Morse, H C 3rd -- Leder, P -- New York, N.Y. -- Science. 1987 May 15;236(4803):816-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3107126" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Alleles ; Animals ; Antibody-Producing Cells/*immunology ; Gene Expression Regulation ; *Genes ; Humans ; Immunoglobulin M/genetics ; Immunoglobulin mu-Chains/*genetics ; Mice ; Mice, Inbred Strains ; RNA, Messenger/genetics ; Transcription, Genetic
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 74
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1987-11-27
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Palmer, A R -- New York, N.Y. -- Science. 1987 Nov 27;238(4831):1217.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3685970" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; DNA, Mitochondrial/*genetics ; Female ; Fertilization ; Male ; Spermatozoa/*physiology ; Zygote/physiology
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 75
    Publikationsdatum: 1987-12-04
    Beschreibung: Ligand-induced decrease in cell-surface receptor number (homologous downregulation) is often due to rapid receptor internalization. Thyrotropin-releasing hormone (TRH), however, causes a slow downregulation of TRH receptors (TRH-Rs), with a half-time of approximately 12 hours, in GH3 rat pituitary cells. The mechanism of TRH-R downregulation was studied by monitoring TRH-evoked depolarizing currents in Xenopus oocytes injected with GH3 cell RNA as a bioassay for TRH-R messenger RNA (mRNA) activity. In GH3 cells, TRH caused a rapid decrease in TRH-R mRNA activity to 15 percent of control within 3 hours. Because the half-life of TRH-R mRNA activity in control cells was approximately 3 hours, the rapid decrease in mRNA activity was not due to inhibition of mRNA synthesis alone and may represent a post-transcriptional effect.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Oron, Y -- Straub, R E -- Traktman, P -- Gershengorn, M C -- New York, N.Y. -- Science. 1987 Dec 4;238(4832):1406-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Cornell University Medical College, New York, NY 10021.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2825350" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Female ; Gene Expression Regulation/drug effects ; Membrane Potentials ; Neoplasm Proteins/metabolism ; Oocytes/drug effects/*metabolism ; Pituitary Neoplasms/pathology ; RNA, Messenger/*biosynthesis ; RNA, Neoplasm/biosynthesis ; Rats ; Receptors, Neurotransmitter/genetics/*metabolism ; Receptors, Thyrotropin-Releasing Hormone ; Thyrotropin-Releasing Hormone/metabolism/*pharmacology ; Tumor Cells, Cultured/metabolism ; Xenopus laevis
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 76
    Publikationsdatum: 1987-02-13
    Beschreibung: A highly T-lymphotropic virus was isolated from cats in a cattery in which all the animals were seronegative for feline leukemia virus. A number of cats in one pen had died and several had an immunodeficiency-like syndrome. Only 1 of 18 normal cats in the cattery showed serologic evidence of infection with this new virus, whereas 10 of 25 cats with signs of ill health were seropositive for the virus. Tentatively designated feline T-lymphotropic lentivirus, this new feline retrovirus appears to be antigenically distinct from human immunodeficiency virus. There is no evidence for cat-to-human transmission of the agent. Kittens experimentally infected by way of blood or plasma from naturally infected animals developed generalized lymphadenopathy several weeks later, became transiently febrile and leukopenic, and continued to show a generalized lymphadenopathy 5 months after infection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pedersen, N C -- Ho, E W -- Brown, M L -- Yamamoto, J K -- CA-39016-02/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1987 Feb 13;235(4790):790-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3643650" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Antigens, Viral/analysis ; Cat Diseases/*microbiology ; Cats/*microbiology ; Female ; HIV/immunology ; Immunologic Deficiency Syndromes/microbiology/*veterinary ; Lymphocytes/ultrastructure ; Male ; Microscopy, Electron ; Retroviridae/immunology/*isolation & purification/ultrastructure ; Species Specificity
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 77
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1987-07-10
    Beschreibung: Inhibin is a gonadal glycoprotein hormone that regulates the production of follicle-stimulating hormone (FSH) by the anterior pituitary gland and exhibits intragonadal actions as well. The present study shows that inhibin-like immunoreactivity (inhibin-LI) is present in cells of the cytotrophoblast layer of human placenta at term and in primary cultures of human trophoblasts. Human chorionic gonadotropin (hCG) stimulated secretion of inhibin-LI from these cultured placental cells. This effect was mimicked by 8-bromo-cyclic adenosine monophosphate (8-bromo-cAMP), forskolin, and cholera toxin, suggesting that the mechanism of hCG induction of placental inhibin-LI secretion is cAMP-dependent. Incubation with an antiserum that binds the alpha-subunit of human inhibin increased the secretion of hCG and gonadotropin-releasing hormone-like immunoreactivity (GnRH-LI) from trophoblast cells in culture, suggesting a local tonic inhibitory action of endogenous inhibin on hCG and GnRH-LI release. The action of inhibin on hCG secretion may partially require the presence of placental GnRH, as suggested by evidence that a synthetic GnRH antagonist partially reverses the hCG increase induced by inhibin immunoneutralization. Results suggest paracrine roles for both inhibin and GnRH in the regulation of placental hCG production.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Petraglia, F -- Sawchenko, P -- Lim, A T -- Rivier, J -- Vale, W -- AM26741/AM/NIADDK NIH HHS/ -- HD13527/HD/NICHD NIH HHS/ -- NS21182/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1987 Jul 10;237(4811):187-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3299703" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): 8-Bromo Cyclic Adenosine Monophosphate/pharmacology ; Cells, Cultured ; Cholera Toxin/pharmacology ; Chorionic Gonadotropin/pharmacology/*secretion ; Chorionic Villi/analysis ; Colforsin/pharmacology ; Feedback ; Female ; Gonadotropin-Releasing Hormone/antagonists & inhibitors/pharmacology/secretion ; Humans ; Infant, Newborn ; Inhibins/analysis/*physiology ; Male ; Pregnancy ; Secretory Rate/drug effects ; Trophoblasts/analysis/drug effects/*secretion
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 78
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1987-08-28
    Beschreibung: Chemical evidence is needed in both insect endocrinology and sensory physiology to understand hormone and pheromone action at the molecular level. Radiolabeled pheromones and hormones have been synthesized and used to identify binding and catabolic proteins from insect tissues. Chemically modified analogs, including photoaffinity labels and enzyme inhibitors, are among the tools used to covalently modify the specific acceptor or catalytic sites. Such targeted agents can also provide leads for the design of growth and mating disruptants by allowing manipulation of the physiologically important interactions of the chemical signals with macromolecules.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Prestwich, G D -- GM-30899/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1987 Aug 28;237(4818):999-1006.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3616631" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Bees/metabolism ; Chemical Phenomena ; Chemistry ; Cockroaches/metabolism ; Female ; Insect Hormones/*metabolism ; Insects/metabolism ; Juvenile Hormones/metabolism ; Male ; Methoprene/metabolism ; Moths/metabolism ; Pheromones/*metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 79
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1987-12-18
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roberts, L -- New York, N.Y. -- Science. 1987 Dec 18;238(4834):1649-51.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3686005" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Female ; Humans ; Japan ; Neoplasms, Radiation-Induced/*epidemiology ; Neutrons ; *Nuclear Warfare ; Radiation Dosage ; Survival ; United States
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 80
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1987-10-16
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roberts, L -- New York, N.Y. -- Science. 1987 Oct 16;238(4825):271-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3659916" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Base Sequence ; Biotechnology/economics/*instrumentation ; DNA/*genetics ; Fluorescent Dyes ; *Genes ; Molecular Biology/economics/instrumentation
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    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 81
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1987-07-24
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roberts, L -- New York, N.Y. -- Science. 1987 Jul 24;237(4813):358-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2885920" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Genes ; *Genetic Engineering ; Humans ; *Patents as Topic ; Polymorphism, Restriction Fragment Length ; United States
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 82
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1987-11-06
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roberts, L -- New York, N.Y. -- Science. 1987 Nov 6;238(4828):750-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3478811" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Chromosome Mapping ; Chromosomes, Human ; *Genes ; Genetic Engineering ; *Genetic Linkage ; *Genetics, Medical ; Humans ; *Publishing
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 83
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1987-07-24
    Beschreibung: The ornithine transcarbamylase-deficient sparse fur mouse is an excellent model to study the most common human urea cycle disorder. The mutation has been well characterized by both biochemical and enzymological methods, but its exact nature has not been revealed. A single base substitution in the complementary DNA for ornithine transcarbamylase from the sparse fur mouse has been identified by means of a combination of two recently described techniques for rapid mutational analysis. This strategy is simpler than conventional complementary DNA library construction, screening, and sequencing, which has often been used to find a new mutation. The ornithine transcarbamylase gene in the sparse fur mouse contains a C to A transversion that alters a histidine residue to an asparagine residue at amino acid 117.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Veres, G -- Gibbs, R A -- Scherer, S E -- Caskey, C T -- HD21452/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1987 Jul 24;237(4813):415-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3603027" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Animals ; Base Sequence ; DNA/analysis ; Disease Models, Animal ; *Genes ; Mice ; Mice, Mutant Strains ; *Mutation ; Ornithine Decarboxylase/deficiency/*genetics ; RNA, Messenger/genetics
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 84
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1987-03-13
    Beschreibung: Although homelessness has been recognized as a serious and growing urban social problem, scientifically acceptable methods for estimating the composition and size of the homeless population have been lacking. A new research approach to estimating the size and composition of undomiciled urban populations is presented, and its utility is illustrated through a description of the literal homeless of Chicago. The homeless in the Chicago sample are unaffiliated persons living in extreme poverty, with high levels of physical and mental disability. Homelessness is interpreted as a manifestation of extreme poverty among persons without families in housing markets with declining stocks of inexpensive dwelling units suitable for single persons.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rossi, P H -- Wright, J D -- Fisher, G A -- Willis, G -- New York, N.Y. -- Science. 1987 Mar 13;235(4794):1336-41.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2950592" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Chicago ; Demography ; Disabled Persons ; Employment ; Female ; *Homeless Persons ; Humans ; Income ; Interviews as Topic ; Male ; Poverty ; Research Design ; Sampling Studies ; Social Isolation ; *Urban Population
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 85
    Publikationsdatum: 1987-07-24
    Beschreibung: Fragile X syndrome is a common form of mental retardation associated with a fragile site on the human X chromosome. Although fragility at this site is usually evident as a nonstaining chromatid gap, it remains unclear whether or not actual chromosomal breakage occurs. By means of somatic cell hybrids containing either a normal human X or a fragile X chromosome and utilizing two genes that flank the fragile site as markers of chromosome integrity, segregation of these markers was shown to be more frequent if they encompass the fragile site under appropriate culture conditions. Hybrid cells that reveal marker segregation were found to contain rearranged X chromosomes involving the region at or near the fragile site, thus demonstrating true chromosomal breakage within this area. Two independent translocation chromosomes were identified involving a rodent chromosome joined to the human X at the location of the fragile site. DNA analysis of closely linked, flanking loci was consistent with the position of the breakpoint being at or very near the fragile X site. Fragility at the translocation junctions was observed in both hybrids, but at significantly lower frequencies than that seen in the intact X of the parental hybrid. This observation suggests that the human portion of the junctional DNA may contain part of a repeated fragility sequence. Since the translocation junctions join heterologous DNA, the molecular cloning of the fragile X sequence should now be possible.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Warren, S T -- Zhang, F -- Licameli, G R -- Peters, J F -- CA31777/CA/NCI NIH HHS/ -- HD20521/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1987 Jul 24;237(4813):420-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3603029" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Cell Line ; Chromosome Banding ; *Cloning, Molecular ; Female ; Fragile X Syndrome/*genetics ; Glucosephosphate Dehydrogenase/genetics ; Humans ; Hybrid Cells/cytology ; Hypoxanthine Phosphoribosyltransferase/genetics ; Male ; Sex Chromosome Aberrations/*genetics ; Translocation, Genetic
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 86
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1987-10-23
    Beschreibung: The fluorescence anisotropy of 1,6-diphenyl-1,3,5-hexatriene in labeled platelet membranes, an index of membrane fluidity, identifies a prominent subgroup of patients with Alzheimer's disease who manifest distinct clinical features. In a family study, the prevalence of this platelet membrane abnormality was 3.2 to 11.5 times higher in asymptomatic, first-degree relatives of probands with Alzheimer's disease than in neurologically healthy control subjects chosen without regard to family history of dementia. The pattern of the platelet membrane abnormality within families was consistent with that of a fully penetrant autosomal dominant trait. Thus, this abnormality of platelet membranes may be an inherited factor that is related to the development of Alzheimer's disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zubenko, G S -- Wusylko, M -- Cohen, B M -- Boller, F -- Teply, I -- AG03705/AG/NIA NIH HHS/ -- AG05133/AG/NIA NIH HHS/ -- MH30915/MH/NIMH NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1987 Oct 23;238(4826):539-42.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Psychiatry, University of Pittsburgh, Western Psychiatric Institute and Clinic, PA 15213.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3659926" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Aged ; Alzheimer Disease/blood/*genetics ; Blood Platelets/*ultrastructure ; Cell Membrane/physiology ; Diphenylhexatriene ; Female ; Fluorescence Polarization ; Humans ; Male ; *Membrane Fluidity ; Middle Aged ; Risk Factors
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 87
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1987-06-26
    Beschreibung: A murine model in which neurotropic retroviral infection can be studied over short periods of time was developed. Microinjection of Cas-Br-E virus into midgestation mouse embryos caused paralysis and death within 25 days after birth, in contrast to virus-infected neonates which develop disease only after 4 months. To evaluate whether antiviral drugs could cross the placental barrier and influence the course of the disease, the drug 3'-azido-3'-deoxythymidine (AZT) was administered to infected embryos through the drinking water of pregnant females. AZT treatment markedly retarded the onset and course of virus-induced central nervous system disease, permitting animals to survive beyond 4 months of age. These results are evidence for effective antiviral treatment during gestation and in the perinatal period and are of potential significance for the management of maternal transmission of the acquired immune deficiency syndrome (AIDS) virus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sharpe, A H -- Jaenisch, R -- Ruprecht, R M -- CA38497/CA/NCI NIH HHS/ -- HD19015/HD/NICHD NIH HHS/ -- U01-AI24845-01/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1987 Jun 26;236(4809):1671-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3037694" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Animals, Newborn ; Antiviral Agents/*therapeutic use ; Central Nervous System Diseases/drug therapy/embryology/*microbiology ; Female ; Fetal Diseases/*drug therapy/microbiology ; Gestational Age ; Maternal-Fetal Exchange ; Mice ; Pregnancy ; *Prenatal Exposure Delayed Effects ; Retroviridae/pathogenicity ; Thymidine/*analogs & derivatives/therapeutic use ; Tumor Virus Infections/*drug therapy/embryology ; Virulence ; Zidovudine
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 88
    Publikationsdatum: 1987-01-09
    Beschreibung: The HER-2/neu oncogene is a member of the erbB-like oncogene family, and is related to, but distinct from, the epidermal growth factor receptor. This gene has been shown to be amplified in human breast cancer cell lines. In the current study, alterations of the gene in 189 primary human breast cancers were investigated. HER-2/neu was found to be amplified from 2- to greater than 20-fold in 30% of the tumors. Correlation of gene amplification with several disease parameters was evaluated. Amplification of the HER-2/neu gene was a significant predictor of both overall survival and time to relapse in patients with breast cancer. It retained its significance even when adjustments were made for other known prognostic factors. Moreover, HER-2/neu amplification had greater prognostic value than most currently used prognostic factors, including hormonal-receptor status, in lymph node-positive disease. These data indicate that this gene may play a role in the biologic behavior and/or pathogenesis of human breast cancer.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Slamon, D J -- Clark, G M -- Wong, S G -- Levin, W J -- Ullrich, A -- McGuire, W L -- CA 30195/CA/NCI NIH HHS/ -- CA 36827/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1987 Jan 9;235(4785):177-82.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3798106" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Axilla ; Breast Neoplasms/*genetics/mortality/pathology ; DNA/genetics ; Female ; *Gene Amplification ; Humans ; Lymph Nodes/pathology ; Neoplasm Recurrence, Local/*genetics ; Nucleic Acid Hybridization ; *Oncogenes ; Prognosis ; Receptor, Epidermal Growth Factor/genetics
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 89
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1987-04-17
    Beschreibung: Studies of risk perception examine the judgements people make when they are asked to characterize and evaluate hazardous activities and technologies. This research aims to aid risk analysis and policy-making by providing a basis for understanding and anticipating public responses to hazards and improving the communication of risk information among lay people, technical experts, and decision-makers. This work assumes that those who promote and regulate health and safety need to understand how people think about and respond to risk. Without such understanding, well-intended policies may be ineffective.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Slovic, P -- New York, N.Y. -- Science. 1987 Apr 17;236(4799):280-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3563507" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Accidents ; *Attitude to Health ; Decision Making ; Female ; Humans ; Industry ; *Judgment ; Models, Psychological ; *Probability ; *Risk
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 90
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-01-01
    Beschreibung: Follicle-stimulating hormone (FSH) is a glycoprotein essential for gonadal development and steroidogenesis. Recent studies suggest that deglycosylation of FSH results in the formation of antagonistic proteins that are capable of binding to gonadal receptors but that are devoid of bioactivity. Treatment of hypogonadal women with an antagonist of gonadotropin-releasing hormone substantially decreased serum FSH bioactivity with minimal changes in immunoreactivity. Chromatofocusing and size fractionation of the serum samples indicated the secretion of immunoreactive FSH isoforms that are devoid of bioactivity but that are capable of blocking FSH action in ovarian granulosa cells. These findings provide the first demonstration of naturally occurring circulating antihormones. These FSH antagonists may play an important role in the physiology and pathophysiology of the gonads.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dahl, K D -- Bicsak, T A -- Hsueh, A J -- HD-06875/HD/NICHD NIH HHS/ -- HD-06939/HD/NICHD NIH HHS/ -- HD-23273/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1988 Jan 1;239(4835):72-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Reproductive Medicine, University of California, San Diego, La Jolla 92093.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3122320" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Biological Assay ; Cross Reactions ; Female ; Follicle Stimulating Hormone/*antagonists & inhibitors/immunology/metabolism ; Glycoproteins/physiology ; Gonadotropin-Releasing Hormone/*antagonists & inhibitors ; Humans ; Isoelectric Point ; Radioligand Assay ; Structure-Activity Relationship
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 91
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-04-15
    Beschreibung: Complementary DNAs (cDNAs) encoding androgen receptors were obtained from human testis and rat ventral prostate cDNA libraries. The amino acid sequence deduced from the nucleotide sequences of the cDNAs indicated the presence of a cysteine-rich DNA-binding domain that is highly conserved in all steroid receptors. The human cDNA was transcribed and the RNA product was translated in cell-free systems to yield a 76-kilodalton protein. The protein was immunoprecipitable by human autoimmune antibodies to the androgen receptor. The protein bound androgens specifically and with high affinity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chang, C S -- Kokontis, J -- Liao, S T -- DK-09461/DK/NIDDK NIH HHS/ -- DK-37694/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1988 Apr 15;240(4850):324-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Ben May Institute, University of Chicago, IL 60637.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3353726" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Animals ; Binding, Competitive ; *Cloning, Molecular ; DNA/genetics ; *Genes ; Humans ; Male ; Molecular Sequence Data ; Molecular Weight ; Rats ; Receptors, Androgen/*genetics/metabolism ; Sequence Homology, Nucleic Acid ; Species Specificity ; Testis/metabolism
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 92
    Publikationsdatum: 1988-02-12
    Beschreibung: Four different regulatory sites required for transcriptional stimulation by the enhancers of two unrelated liver-specific genes alpha 1-antitrypsin and transthyretin appear to bind the same nuclear protein that is found mainly in the liver. Such proteins may provide a basis for a coordinated, hepatocyte-specific control of gene transcription.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Grayson, D R -- Costa, R H -- Xanthopoulos, K G -- Darnell, J E -- CA 160006-14/CA/NCI NIH HHS/ -- CA 18213-11/CA/NCI NIH HHS/ -- GM 1066-02/GM/NIGMS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1988 Feb 12;239(4841 Pt 1):786-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Rockefeller University, New York, NY 10021.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3257586" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; *Enhancer Elements, Genetic ; Gene Expression Regulation ; *Genes ; Genes, Regulator ; Liver/*metabolism ; Mice ; Mutation ; Nuclear Proteins/*physiology ; Prealbumin/*genetics ; *Transcription, Genetic ; alpha 1-Antitrypsin/*genetics
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 93
    Publikationsdatum: 1988-12-09
    Beschreibung: Cyclic AMP (cAMP) is an intracellular second messenger that activates transcription of many cellular genes. A palindromic consensus DNA sequence, TGACGTCA, functions as a cAMP-responsive transcriptional enhancer (CRE). The CRE binds a cellular protein of 38 kD in placental JEG-3 cells. A placental lambda gt11 library was screened for expression of specific CRE-binding proteins with the CRE sequence as a radioactive probe. A cDNA encoding a protein of 326 amino acids with the binding properties of a specific CRE-binding protein (CREB) was isolated. The protein contains a COOH-terminal basic region adjacent to a sequence similar to the "leucine zipper" sequence believed to be involved in DNA binding and in protein-protein contacts in several other DNA-associated transcriptional proteins including the products of the c-myc, c-fos, and c-jun oncogenes and GCN4. The CREB protein also contains an NH2-terminal acidic region proposed to be a potential transcriptional activation domain. The putative DNA-binding domain of CREB is structurally similar to the corresponding domains in the phorbol ester-responsive c-jun protein and the yeast transcription factor GCN4.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hoeffler, J P -- Meyer, T E -- Yun, Y -- Jameson, J L -- Habener, J F -- DK 25532/DK/NIDDK NIH HHS/ -- DK 30457/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1988 Dec 9;242(4884):1430-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Endocrinology, Massachusetts General Hospital, Boston.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2974179" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Base Sequence ; *Cloning, Molecular ; Cyclic AMP Response Element-Binding Protein ; DNA/*genetics ; DNA-Binding Proteins/*genetics/physiology ; Enhancer Elements, Genetic ; Female ; Humans ; Molecular Sequence Data ; Placenta/*metabolism ; Pregnancy ; Transcription, Genetic
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 94
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    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-08-12
    Beschreibung: Receptors for N-methyl-D-aspartate (NMDA) are involved in many plastic and pathological processes in the brain. Glycine has been reported to potentiate NMDA responses in neurons and in Xenopus oocytes injected with rat brain messenger RNA. Glycine is now shown to be absolutely required for activation of NMDA receptors in oocytes. In voltage-clamped oocytes, neither perfusion nor rapid pressure application of NMDA onto messenger RNA-injected oocytes caused a distinct ionic current without added glycine. When glycine was added, however, NMDA evoked large inward currents. The concentration of glycine required to produce a half-maximal response was 670 nanomolar, and the glycine dose-response curve extrapolated to zero in the absence of glycine. Several analogs of glycine could substitute for glycine, among which D-serine and D-alanine were the most effective. The observation that D-amino acids are effective will be important in developing drugs targeted at the glycine site.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kleckner, N W -- Dingledine, R -- NS17771/NS/NINDS NIH HHS/ -- NS22249/NS/NINDS NIH HHS/ -- NS23804/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1988 Aug 12;241(4867):835-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, University of North Carolina, Chapel Hill 27599-7365.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2841759" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acids/pharmacology ; Animals ; Brain/metabolism ; Female ; Glycine/*analogs & derivatives/*pharmacology ; Kinetics ; Oocytes/drug effects/*metabolism ; RNA, Messenger/genetics ; Rats ; Receptors, N-Methyl-D-Aspartate ; Receptors, Neurotransmitter/drug effects/genetics/*metabolism ; Xenopus
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    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 95
    Publikationsdatum: 1988-07-22
    Beschreibung: Fertilization initiates in the egg a dramatic increase in intracellular calcium that opens ion channels and causes exocytosis. To explore the possibility that these events might involve a receptor-mediated pathway, receptors for serotonin or acetylcholine (M1 muscarinic) were expressed in the Xenopus egg; serotonin or acetylcholine then could initiate a series of responses similar to those normally initiated by sperm. Thus, there may be an endogenous receptor in the egg membrane that is activated by sperm, and the serotonin or M1 muscarinic receptor may replace the sperm receptor in this pathway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kline, D -- Simoncini, L -- Mandel, G -- Maue, R A -- Kado, R T -- Jaffe, L A -- New York, N.Y. -- Science. 1988 Jul 22;241(4864):464-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology, University of Connecticut Health Center, Farmington 06032.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3134693" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Cloning, Molecular ; Cytoplasmic Granules/physiology ; Endocytosis ; Exocytosis ; Female ; *Fertilization ; GTP-Binding Proteins/physiology ; Genetic Engineering ; Inositol Phosphates/physiology ; Male ; Membrane Potentials ; Receptors, Muscarinic/*physiology ; Receptors, Serotonin/*physiology ; Sperm-Ovum Interactions ; Xenopus laevis
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 96
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-06-03
    Beschreibung: Gonadotropin stimulates protein synthesis and growth in ovarian oocytes. The hormone is also known to modify transfollicular K+ fluxes and is now shown to cause increased intraoocytic K+ activity (aK). The hormone's effect on aK was duplicated by microinjecting K+ salts into oocytes which were incubated in paraffin oil. This treatment mimicked the influence of gonadotropin on both the rate of protein synthesis and the synthesis of specific polypeptides. These findings suggest that gonadotropin-stimulated oocyte growth is attributable largely to the hormone's influence on transfollicular K+ fluxes. They support the hypothesis that the K+ flux and aK changes observed during cell activation are critical in causing subsequent increases in protein synthesis and growth.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lau, Y T -- Yassin, R R -- Horowitz, S B -- New York, N.Y. -- Science. 1988 Jun 3;240(4857):1321-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology and Biophysics, Michigan Cancer-Foundation, Detroit 48201.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3375816" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Chorionic Gonadotropin/*pharmacology ; Electrophoresis, Polyacrylamide Gel ; Female ; Leucine/metabolism ; Microinjections ; Oocytes/drug effects/growth & development/*metabolism ; Potassium/metabolism ; Potassium Chloride/*pharmacology ; Protein Biosynthesis ; Xenopus laevis
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 97
    Publikationsdatum: 1988-12-16
    Beschreibung: Site-directed mutagenesis and expression in Xenopus oocytes were used to study acetylcholine receptors in which serine residues (i) were replaced by alanines (alpha, delta subunits) or (ii) replaced a phenylalanine (beta subunit) at a postulated polar site within the M2 transmembrane helix. As the number of serines decreased, there were decreases in the residence time and consequently the equilibrium binding affinity of QX-222, a quaternary ammonium anesthetic derivative thought to bind within the open channel. Receptors with three serine-to-alanine mutations also displayed a selective decrease in outward single-channel currents. Both the direction of this rectification and the voltage dependence of QX-222 blockade suggest that the residues mutated are within the aqueous pore of the receptor and near its cytoplasmic (inner) surface.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Leonard, R J -- Labarca, C G -- Charnet, P -- Davidson, N -- Lester, H A -- NS-11756/NS/NINDS NIH HHS/ -- NS-8083/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1988 Dec 16;242(4885):1578-81.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Biology, California Institute of Technology, Pasadena 91125.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2462281" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Cell Membrane/*physiology ; Cloning, Molecular ; Electric Conductivity ; Female ; Ion Channels/*physiology ; Kinetics ; Membrane Potentials ; Mutation ; Oocytes/physiology ; RNA, Messenger/genetics ; Receptors, Nicotinic/genetics/*physiology ; Transcription, Genetic ; Xenopus
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 98
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    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-11-04
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lewin, R -- New York, N.Y. -- Science. 1988 Nov 4;242(4879):668.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3187517" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Biological Evolution ; Female ; Male ; Primates/*physiology ; Sexual Behavior, Animal/*physiology ; Spermatozoa/physiology ; Testis/anatomy & histology
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 99
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-06-03
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lewin, R -- New York, N.Y. -- Science. 1988 Jun 3;240(4857):1277-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3375815" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Birds/physiology ; Female ; Male ; *Sex Characteristics ; *Sexual Behavior, Animal
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 100
    facet.materialart.
    Unbekannt
    American Association for the Advancement of Science (AAAS)
    Publikationsdatum: 1988-05-13
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lewin, R -- New York, N.Y. -- Science. 1988 May 13;240(4854):884.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3363371" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; *Body Constitution ; Body Height ; Body Weight ; Female ; *Fertility ; Male ; Models, Biological ; *Sex Characteristics
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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