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  • Cells, Cultured  (33)
  • *Genes  (29)
  • American Association for the Advancement of Science (AAAS)  (62)
  • Annual Reviews
  • 1980-1984  (62)
  • 1984  (62)
Collection
Publisher
  • American Association for the Advancement of Science (AAAS)  (62)
  • Annual Reviews
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  • 1980-1984  (62)
Year
  • 1
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-10-26
    Description: Mutations in the Caenorhabditis elegans genes lin-14, lin-28, and lin-29 cause heterochronic developmental defects: the timing of specific developmental events in several tissues is altered relative to the timing of events in other tissues. These defects result from temporal transformations in the fates of specific cells, that is, certain cells express fates normally expressed by cells generated at other developmental stages. The identification and characterization of genes that can be mutated to cause heterochrony support the proposal that heterochrony is a mechanism for phylogenetic change and suggest cellular and genetic bases for heterochronic variation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ambros, V -- Horvitz, H R -- GM24663/GM/NIGMS NIH HHS/ -- GM24943/GM/NIGMS NIH HHS/ -- HD00369/HD/NICHD NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1984 Oct 26;226(4673):409-16.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6494891" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Caenorhabditis/*genetics ; Female ; *Genes ; Genetic Variation ; Male ; *Mutation ; *Phylogeny ; Time Factors
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  • 2
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-10-26
    Description: Procedures have now been developed for inserting functional genes into the bone marrow of mice. The most effective delivery system at present uses retroviral-based vectors to transfer a gene into murine bone marrow cells in culture. The genetically altered bone marrow is then implanted into recipient animals. These somatic cell gene therapy techniques are becoming increasingly efficient. Their future application in humans should result in at least partial correction of a number of genetic disorders. However, the safety of the procedures must still be established by further animal studies before human clinical trials would be ethical.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Anderson, W F -- New York, N.Y. -- Science. 1984 Oct 26;226(4673):401-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6093246" target="_blank"〉PubMed〈/a〉
    Keywords: Animal Experimentation ; Bone Marrow ; Containment of Biohazards ; DNA Viruses/genetics ; *DNA, Recombinant ; Ethics Committees, Research ; Ethics, Medical ; Federal Government ; Gene Expression Regulation ; *Genes ; Genetic Diseases, Inborn/*therapy ; *Genetic Engineering ; Genetic Vectors ; Government Regulation ; Humans ; Microinjections ; Operon ; Plasmids ; Retroviridae/genetics ; Risk Assessment ; Skin ; Transcription, Genetic ; future clinical trials in humans are being debated among scientists and policy ; makers. Anderson, chief of the Laboratory of Molecular Hematology at the National ; Heart, Lung, and Blood Institute, examines how soon gene therapy might be ; available for the treatment of diseases in humans, and what criteria should be ; met before experimentation with human subjects begins. He identifies delivery, ; gene expression, and safety as the three requisites that must be satisfied, and ; reviews the animal work that has been done in these areas. Human trials should ; begin only after more animal studies have demonstrated to local and federal ; review committees that gene therapy is safe and offers the possibility of benefit ; to patients.
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  • 3
    Publication Date: 1984-11-23
    Description: Endonuclease restriction (Hind III) fragments of DNA from Chinese hamster X mouse somatic cell hybrids hybridized with proline-rich protein complementary DNA clones only when the DNA was isolated from cells containing mouse chromosome 8, or a fragment of chromosome 8. The evidence suggests that proline-rich protein genes are located at the proximal portion of chromosome 8 toward the centromere.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Azen, E A -- Carlson, D M -- Clements, S -- Lalley, P A -- Vanin, E -- AM 19175/AM/NIADDK NIH HHS/ -- DEO 3658-19/DE/NIDCR NIH HHS/ -- GM 20069/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1984 Nov 23;226(4677):967-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6095444" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chromosome Mapping ; DNA Restriction Enzymes ; *Genes ; Humans ; Mice ; Mice, Inbred Strains ; Nucleic Acid Hybridization ; Peptides/*genetics ; Proline-Rich Protein Domains ; Protein Biosynthesis ; RNA, Messenger/genetics ; Salivary Proteins and Peptides/*genetics ; Species Specificity
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  • 4
    Publication Date: 1984-10-19
    Description: A complementary DNA probe corresponding to the beta-chain gene of Ti, the human T lymphocyte receptor, has been molecularly cloned. The chromosomal origin of the Ti beta gene was determined with the complementary DNA by screening a series of 12 cell hybrid (mouse X human) DNA's containing overlapping subsets of human chromosomes. DNA hybridization (Southern) experiments showed that the human Ti beta gene resides on chromosome 7 and is thus not linked to the immunoglobulin loci or to the major histocompatibility locus in humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barker, P E -- Ruddle, F H -- Royer, H D -- Acuto, O -- Reinherz, E L -- AI 21226/AI/NIAID NIH HHS/ -- GM-09966/GM/NIGMS NIH HHS/ -- R0 1 AI 19807/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1984 Oct 19;226(4672):348-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6435246" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chromosome Mapping ; *Chromosomes, Human, 6-12 and X ; Cloning, Molecular ; Dna ; *Genes ; Genetic Linkage ; Humans ; Hybrid Cells ; Immunoglobulin kappa-Chains/genetics ; Major Histocompatibility Complex ; Mice ; Nucleic Acid Hybridization ; Receptors, Antigen, T-Cell/*genetics
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  • 5
    Publication Date: 1984-01-13
    Description: Cultures of human diploid fibroblasts contain cells that respond to exposure to the first component of complement (C1) by initiating DNA synthesis and growth. The plasma membranes of these cells have specific binding sites for the C1q subcomponent of C1. A fluorescence-activated cell sorter was used to isolate a subset of cells with a high affinity for C1q, and the growth and synthesis activities of these high-affinity cells were studied after numerous replications in vitro. These cells synthesize DNA and grow faster than the parent cultures and low-affinity cells, and they produce two to three times as much protein. About 40 percent of their total protein synthesis activity is directed to collagen production, unusually high proportions of collagen types III and V being produced. These properties and the high affinity of the cells for C1q are retained for at least six cell transfers. This phenotype has the properties expected of fibroblasts in healing wounds and inflamed tissues.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bordin, S -- Page, R C -- Narayanan, A S -- DE-02600/DE/NIDCR NIH HHS/ -- DE-03301/DE/NIDCR NIH HHS/ -- New York, N.Y. -- Science. 1984 Jan 13;223(4632):171-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6691142" target="_blank"〉PubMed〈/a〉
    Keywords: *Antigens, CD44 ; Carrier Proteins ; Cell Division ; Cell Separation ; Cells, Cultured ; Collagen/*biosynthesis/classification ; DNA/*biosynthesis ; Fibroblasts/analysis/cytology/*physiology ; Flow Cytometry ; Gingiva ; Humans ; *Membrane Glycoproteins ; Mitochondrial Proteins ; Phenotype ; *Protein Biosynthesis ; Receptors, Complement/*analysis
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  • 6
    Publication Date: 1984-11-23
    Description: A cloned complementary DNA derived from a messenger RNA transiently present at low abundance levels in early chick embryonic skeletal muscle hybridizes to a messenger RNA present at high abundance levels in cardiac muscle. Genomic DNA hybridization and nucleotide sequence identity of complementary DNA's from both heart and skeletal muscle demonstrate that the messenger RNA's from both sources are encoded by the same gene. The encoded polypeptide is a troponin T sequence which is probably a cardiac isoform. This single copy troponin T isogene is governed by different regulatory programs in heart and skeletal muscle differentiation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cooper, T A -- Ordahl, C P -- R01-GM32018/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1984 Nov 23;226(4677):979-82.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6095446" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Chick Embryo ; Chickens ; DNA Restriction Enzymes ; *Gene Expression Regulation ; *Genes ; Heart/*embryology ; Muscles/*embryology/metabolism ; Myocardium/metabolism ; Nucleic Acid Hybridization ; RNA, Messenger/genetics ; Troponin/*genetics ; Troponin T
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  • 7
    Publication Date: 1984-08-10
    Description: The gene for the circumsporozoite (CS) protein of Plasmodium falciparum has been cloned and its nucleotide sequence determined. The gene encodes a protein of 412 amino acids as deduced from the nucleotide sequence. The protein contains 41 tandem repeats of a tetrapeptide, 37 of which are Asn-Ala-Asn-Pro and four of which are Asn-Val-Asp-Pro. Monoclonal antibodies against the CS protein of Plasmodium falciparum were inhibited from binding to the protein by synthetic peptides of the repeat sequence. The CS protein of Plasmodium falciparum and the CS protein of a simian malaria parasite, Plasmodium knowlesi, have two regions of homology, one of which is present on either side of the repeat. One region contains 12 of 13 identical amino acids. Within the nucleotide sequence of this region, 25 of 27 nucleotides are conserved. The conservation of these regions in parasites widely separated in evolution suggests that they may have a function such as binding to liver cells and may represent an invariant target for immunity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dame, J B -- Williams, J L -- McCutchan, T F -- Weber, J L -- Wirtz, R A -- Hockmeyer, W T -- Maloy, W L -- Haynes, J D -- Schneider, I -- Roberts, D -- New York, N.Y. -- Science. 1984 Aug 10;225(4662):593-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6204383" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Antibodies, Monoclonal/immunology ; Antigens, Surface/*genetics/immunology ; Base Sequence ; Epitopes/genetics ; *Genes ; Humans ; Liver/parasitology ; Malaria/*immunology ; Plasmodium/genetics ; Plasmodium falciparum/*genetics/immunology ; *Protozoan Proteins
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  • 8
    Publication Date: 1984-09-14
    Description: Nuclear estrogen receptor from MCF-7 cells undergoes a time-dependent, hormone-inducible transformation to a form that is less extractable from nuclei and less exchangeable with ligand. This receptor-modifying, intranuclear event is independent of receptor loss (processing) and appears associated with hormone responsiveness (progesterone-receptor induction) in these cells. The magnitude of receptor loss, however, is variable and apparently not a prerequisite for hormone action to induce progesterone receptor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kasid, A -- Strobl, J S -- Huff, K -- Greene, G L -- Lippman, M E -- New York, N.Y. -- Science. 1984 Sep 14;225(4667):1162-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6474170" target="_blank"〉PubMed〈/a〉
    Keywords: Breast Neoplasms/*metabolism ; Cell Nucleus/metabolism ; Cells, Cultured ; Female ; Humans ; Receptors, Estradiol ; Receptors, Estrogen/*metabolism ; Receptors, Progesterone/biosynthesis ; Time Factors
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  • 9
    Publication Date: 1984-05-04
    Description: Peripheral blood lymphocytes from patients with the acquired immunodeficiency syndrome (AIDS) or with signs or symptoms that frequently precede AIDS (pre-AIDS) were grown in vitro with added T-cell growth factor and assayed for the expression and release of human T-lymphotropic retroviruses (HTLV). Retroviruses belonging to the HTLV family and collectively designated HTLV-III were isolated from a total of 48 subjects including 18 of 21 patients wih pre-AIDS, three of four clinically normal mothers of juveniles with AIDS, 26 of 72 adult and juvenile patients with AIDS, and from one of 22 normal male homosexual subjects. No HTLV-III was detected in or isolated from 115 normal heterosexual subjects. The number of HTLV-III isolates reported here underestimates the true prevalence of the virus since many specimens were received in unsatisfactory condition. Other data show that serum samples from a high proportion of AIDS patients contain antibodies to HTLV-III. That these new isolates are members of the HTLV family but differ from the previous isolates known as HTLV-I and HTLV-II is indicated by their morphological, biological, and immunological characteristics. These results and those reported elsewhere in this issue suggest that HTLV-III may be the primary cause of AIDS.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gallo, R C -- Salahuddin, S Z -- Popovic, M -- Shearer, G M -- Kaplan, M -- Haynes, B F -- Palker, T J -- Redfield, R -- Oleske, J -- Safai, B -- New York, N.Y. -- Science. 1984 May 4;224(4648):500-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6200936" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/blood/*microbiology ; Adult ; Antigens, Viral/analysis ; Cells, Cultured ; Cytopathogenic Effect, Viral ; Deltaretrovirus/*isolation & purification/physiology/ultrastructure ; Female ; Homosexuality ; Humans ; Immune Sera/pharmacology ; Interferon Type I/immunology ; Male ; RNA-Directed DNA Polymerase/metabolism ; Risk ; T-Lymphocytes/microbiology
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  • 10
    Publication Date: 1984-11-02
    Description: Smooth muscle cells with 4C (double diploid) DNA content have been found in major arteries. The proportion of 4C cells increases with normal aging and with hypertension. These cells may represent a state of arrest at the G2 phase of the cell cycle or may be examples of true tetraploidy. Flow cytometric cell sorting was used to isolate 4C smooth muscle cells from the rat aorta, and the cells were cultured. Flow cytometry, Feulgen microdensitometry, and karyotyping of the progeny of the 4C cells established the presence of true tetraploid cells. These findings demonstrate the presence of reproductively viable tetraploid cells in a normal mammalian tissue.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goldberg, I D -- Rosen, E M -- Shapiro, H M -- Zoller, L C -- Myrick, K -- Levenson, S E -- Christenson, L -- 5-P01-CA-12662/CA/NCI NIH HHS/ -- AG00599/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 1984 Nov 2;226(4674):559-61.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6494901" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aorta, Thoracic/analysis/*cytology ; Cells, Cultured ; DNA/analysis ; Flow Cytometry ; Humans ; Karyotyping ; Muscle, Smooth, Vascular/analysis/*cytology ; *Polyploidy ; Rats ; Rats, Inbred Strains
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  • 11
    Publication Date: 1984-05-18
    Description: DNA replication in mammals is temporally bimodal. "Housekeeping" genes, which are active in all cells, replicate during the first half of the S phase of cell growth. Tissue-specific genes replicate early in those cells in which they are potentially expressed, and they usually replicate late in tissues in which they are not expressed. Replication during the first half of the S phase is, therefore, a necessary but not sufficient condition for gene transcription. A change in the replication timing of a tissue-specific gene appears to reflect the commitment of that gene to transcriptional competence or to quiescence during ontogeny. Most families of middle repetitive sequences replicate either early or late. These data are consistent with a model in which two functionally distinct genomes coexist in the nucleus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goldman, M A -- Holmquist, G P -- Gray, M C -- Caston, L A -- Nag, A -- GM 07526/GM/NIGMS NIH HHS/ -- GM23905/GM/NIGMS NIH HHS/ -- K04 HD 00323/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1984 May 18;224(4650):686-92.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6719109" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anura ; Chromatin/physiology ; Cricetinae ; DNA/physiology ; *DNA Replication ; *Genes ; HeLa Cells/metabolism ; Humans ; Nucleic Acid Hybridization ; *Repetitive Sequences, Nucleic Acid ; Replicon ; Transcription, Genetic
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  • 12
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-10-05
    Description: The human malarial parasite Plasmodium falciparum can produce surface protrusions (knobs) on infected erythrocytes; however, long-term culturing of the parasite results in the appearance of knobless cells. In this study it was found that a knob-producing clone lost the ability to produce knobs in vitro. Furthermore, a clone not producing knobs derived from the knob-producing clone regained the capacity to produce knobby cells in vitro. Certain parasite proteins were associated with the knobby phenotype but not with the knobless type. These results indicate that the parasites change in vitro in a spontaneous and reversible manner independent of immunological selection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gritzmacher, C A -- Reese, R T -- AI 18695/AI/NIAID NIH HHS/ -- DRR 00833/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1984 Oct 5;226(4670):65-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6382613" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Clone Cells ; Erythrocytes/*parasitology/ultrastructure ; Humans ; Mutation ; Phenotype ; Plasmodium falciparum/analysis/genetics/growth & development/*physiology ; Proteins/analysis
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  • 13
    Publication Date: 1984-11-02
    Description: The motile activity of growth cones of specific identified neurons is inhibited by the neurotransmitter serotonin, although other identified neurons are unaffected. As a consequence, affected neurons are unable to form electrical synapses, whereas other neurons whose growth is unaffected can still interconnect. This result demonstrates that neurotransmitters can play a prominent role in regulating neuronal architecture and connectivity in addition to their classical role in neurotransmission.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Haydon, P G -- McCobb, D P -- Kater, S B -- HD18577/HD/NICHD NIH HHS/ -- NS15350/NS/NINDS NIH HHS/ -- NS18819/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1984 Nov 2;226(4674):561-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6093252" target="_blank"〉PubMed〈/a〉
    Keywords: Animal Population Groups ; Animals ; Cells, Cultured ; Neurons/*drug effects/growth & development ; Serotonin/*pharmacology ; Snails ; Synapses/*drug effects ; Synaptic Transmission
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  • 14
    Publication Date: 1984-04-20
    Description: Ganglion cells were dissociated from postnatal rat retinas, identified by specific fluorescent labels, and maintained in culture on a variety of substrates. Regeneration of processes by retinal ganglion cells was enhanced when the cells were plated on glass coated with a monoclonal antibody against the Thy-1 determinant. Plain glass and glass coated with polylysine, collagen, fibronectin, or other monoclonal antibodies supported the growth of neural processes, but were less effective than antibody to Thy-1.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Leifer, D -- Lipton, S A -- Barnstable, C J -- Masland, R H -- EY01075/EY/NEI NIH HHS/ -- EY03735/EY/NEI NIH HHS/ -- EY04179/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1984 Apr 20;224(4646):303-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6143400" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal/*physiology ; Antigens, Surface/*immunology ; Antigens, Thy-1 ; Cell Adhesion ; Cells, Cultured ; Isoantibodies/*physiology ; *Nerve Regeneration ; Polylysine/pharmacology ; Rats ; Retina/cytology/*physiology ; Retinal Ganglion Cells/*physiology
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  • 15
    Publication Date: 1984-08-24
    Description: Infectious retroviruses have been detected in 22 of 45 randomly selected patients with acquired immune deficiency syndrome (AIDS) and in other individuals from San Francisco. The AIDS-associated retroviruses (ARV) studied in detail had a type D morphology, Mg2+-dependent reverse transcriptase, and cytopathic effects on lymphocytes. The viruses can be propagated in an established adult human T cell line, HUT-78. They cross-react with antiserum to the lymphadenopathy-associated retrovirus isolated from AIDS patients in France. Antibodies to ARV were found in all 86 AIDS patients and in a high percentage of 88 other homosexual men in San Francisco. This observation indicates the widespread presence of these lymphocytopathic retroviruses and their close association with AIDS.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Levy, J A -- Hoffman, A D -- Kramer, S M -- Landis, J A -- Shimabukuro, J M -- Oshiro, L S -- CA-34980/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1984 Aug 24;225(4664):840-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6206563" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/immunology/*microbiology ; Antibodies, Viral/analysis ; Bone Marrow/microbiology ; California ; Cell Line ; Cells, Cultured ; Cross Reactions ; Cytopathogenic Effect, Viral ; Deltaretrovirus/immunology/*isolation & purification/physiology/ultrastructure ; *Homosexuality ; Humans ; Leukocytes/microbiology ; Lymphatic Diseases/immunology ; Male ; RNA-Directed DNA Polymerase/metabolism ; Syndrome ; T-Lymphocytes ; Virus Cultivation
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  • 16
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-02-24
    Description: Human fibroblasts have exhibited enhanced DNA synthesis when exposed to sinusoidally varying magnetic fields for a wide range of frequencies (15 hertz to 4 kilohertz) and amplitudes (2.3 X 10(-6) to 5.6 X 10(-4) tesla). This effect, which is at maximum during the middle of the S phase of the cell cycle, appears to be independent of the time derivative of the magnetic field, suggesting an underlying mechanism other than Faraday's law. The threshold is estimated to be between 0.5 X 10(-5) and 2.5 X 10(-5) tesla per second. These results bring into question the allegedly specific magnetic wave shapes now used in therapeutic devices for bone nonunion. The range of magnetic field amplitudes tested encompass the geomagnetic field, suggesting the possibility of mutagenic interactions directly arising from short-term changes in the earth's field.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Liboff, A R -- Williams, T Jr -- Strong, D M -- Wistar, R Jr -- New York, N.Y. -- Science. 1984 Feb 24;223(4638):818-20.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6695183" target="_blank"〉PubMed〈/a〉
    Keywords: Cells, Cultured ; DNA/*biosynthesis ; Humans ; *Magnetics ; Mutation ; Periodicity
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  • 17
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-03-30
    Description: Astroblasts in culture proliferated when exposed to glia maturation factor for at least 2 hours and then to insulin, but not when exposed in the reverse order. The sequential relation suggests that glia maturation factor is a competence factor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lim, R -- Miller, J F -- CA-31796/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1984 Mar 30;223(4643):1419-20.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6367047" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Astrocytes/drug effects/physiology ; Cell Division/drug effects ; Cells, Cultured ; Drug Interactions ; Glia Maturation Factor ; Growth Substances/*pharmacology/physiology ; Insulin/*pharmacology/physiology ; Mice ; Mice, Inbred BALB C ; Nerve Tissue Proteins/*pharmacology/physiology ; Rats
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  • 18
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-12-14
    Description: The electrophysiological properties of glial cells were examined in primary culture in the presence of tetraethylammonium and Ba2+, a treatment that reduces K+ permeability of the membrane and enhances currents through voltage-dependent Ca2+ channels. Under these conditions, glial cells showed both spontaneous action potentials and action potentials evoked by the injections of current. These responses appear to represent entry of Ba2+ through Ca2+ channels because they were resistant to tetrodotoxin but were blocked by Mn2+ or Cd2+.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉MacVicar, B A -- New York, N.Y. -- Science. 1984 Dec 14;226(4680):1345-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6095454" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Barium/pharmacology ; Cadmium/pharmacology ; Calcium/*metabolism ; Cells, Cultured ; Evoked Potentials ; Ion Channels/*physiology ; Microelectrodes ; Neuroglia/*physiology ; Tetraethylammonium Compounds/pharmacology ; Tetrodotoxin/pharmacology
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  • 19
    Publication Date: 1984-12-14
    Description: The humoral immune response of the mouse to certain antigens is characterized by the dominant expression of a single or limited number of related, immunoglobulin variable region (V) structures by antibody-secreting lymphocytes. Such dominance could be due to preferred expression of these V regions in the B cell population prior to the immune response or could result from the action of selective or regulatory mechanisms during the immune response. Expression of a heavy chain variable region (VH) gene segment that partially encodes a V region structure that dominates the immune response to para-azophenylarsonate (Ars) in strain A mice was examined in the B cell population of Ars nonimmune mice. This VH gene segment participates in encoding several hundred thousand different V region structures expressed in this B cell population. The immune system is therefore capable of recurrently selecting a single V region structure from such a repertoire for dominant expression by antibody-secreting lymphocytes during an immune response.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Manser, T -- Huang, S Y -- Gefter, M L -- AI13357/AI/NIAID NIH HHS/ -- CA28900/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1984 Dec 14;226(4680):1283-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6334361" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibody Diversity ; *Antibody Formation ; Azo Compounds/immunology ; B-Lymphocytes/immunology ; Base Sequence ; *Genes ; Hybridomas ; Immunoglobulin Variable Region/*genetics ; Mice ; Radioimmunoassay
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  • 20
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-11-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1984 Nov 30;226(4678):1064-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6093259" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/microbiology ; *Cloning, Molecular ; Deltaretrovirus/genetics ; *Genes ; Humans ; Receptors, Antigen, T-Cell/*genetics ; Receptors, Immunologic/*genetics ; Receptors, Interleukin-2 ; T-Lymphocytes/immunology
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  • 21
    Publication Date: 1984-11-30
    Description: Intraperitoneal administration of insulin to control rats and to rats with pituitary stalk transections or with lesions of the median eminence resulted in increased plasma adrenocorticotropin (ACTH) levels. The insulin-induced stimulation of ACTH release was blocked in both the control and lesioned animals by prior treatment with either the beta-adrenergic antagonist propranolol or the glucocorticoid analog dexamethasone. The direct application of insulin to primary cultures of the anterior pituitary did not evoke ACTH release or affect the maximal ability of corticotropin-releasing factor or epinephrine to stimulate ACTH secretion. The results suggest that insulin stimulates ACTH release by a mechanism in which catecholamines of peripheral origin act directly on the anterior pituitary.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mezey, E -- Reisine, T D -- Brownstein, M J -- Palkovits, M -- Axelrod, J -- New York, N.Y. -- Science. 1984 Nov 30;226(4678):1085-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6093262" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenocorticotropic Hormone/blood/*secretion ; Animals ; Cells, Cultured ; Corticotropin-Releasing Hormone/pharmacology ; Dexamethasone/pharmacology ; Epinephrine/pharmacology ; Insulin/*pharmacology ; Median Eminence/physiology ; Pituitary Gland/physiology ; Pituitary Gland, Anterior/drug effects/*secretion ; Propranolol/*pharmacology ; Rats ; Receptors, Adrenergic, beta/drug effects/*physiology
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  • 22
    Publication Date: 1984-09-07
    Description: A growth hormone minigene carrying its natural promoter (237 nucleotides of chromosomal DNA) was stably propagated in a murine retrovirus containing hypoxanthine-guanine phosphoribosyltransferase as a selectable marker. Glucocorticoid and thyroid hormone inducibility was transferred with the growth hormone gene. Recombinant virus with titers of 10(6) per milliliter was recovered. This demonstration that retroviruses can be used to transfer a nonselectable gene under its own regulatory control enlarges the scope of retroviral vectors as potent tools for gene transfer.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Miller, A D -- Ong, E S -- Rosenfeld, M G -- Verma, I M -- Evans, R M -- New York, N.Y. -- Science. 1984 Sep 7;225(4666):993-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6089340" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; DNA, Recombinant ; DNA, Viral/analysis ; Dexamethasone/pharmacology ; Gene Expression Regulation ; *Genes ; Genes, Viral ; Genetic Markers ; *Genetic Vectors ; Growth Hormone/biosynthesis/*genetics ; Hypoxanthine Phosphoribosyltransferase/genetics ; Mice ; Operon ; Phenotype ; RNA, Viral/genetics ; Rats ; Retroviridae/*genetics ; Transcription, Genetic ; Transfection ; Triiodothyronine/pharmacology
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  • 23
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-06-29
    Description: Normal human colon mucosal epithelial cells were cultured in vitro and treated with the oncogenic simian DNA virus (SV40) and the chemical carcinogen azoxymethane. Both SV40 and azoxymethane altered a number of phenotypic characteristics of the normal human colon cells, including their morphology, culture longevity, growth in soft agar, substrate adherence, and peanut agglutinin binding. The SV40 transformants synthesized intranuclear T antigen. These data indicate that normal human colon mucosal cells were transformed toward the malignant phenotype.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moyer, M P -- Aust, J B -- RRO5654/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1984 Jun 29;224(4656):1445-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6328655" target="_blank"〉PubMed〈/a〉
    Keywords: Antigens, Viral, Tumor/metabolism ; Azoxymethane/pharmacology ; Cell Transformation, Neoplastic/*physiopathology ; Cells, Cultured ; Colon/*cytology/drug effects ; Colonic Neoplasms/physiopathology ; Fibroblasts/drug effects ; Humans ; Lectins/pharmacology ; Simian virus 40/metabolism
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  • 24
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-02-10
    Description: When human lymphocytes were cultured with [3H]thymidine, which acts as a source of low-level chronic radiation, and then exposed to 150 rad of x-rays at 5, 7, 9, or 11 hours before fixation, the yield of chromatid aberrations was less than the sum of the yields of aberrations induced by [3H]thymidine and x-rays separately. Often fewer aberrations were found after exposure to radiation from both sources than were found after exposure to x-rays alone. At the same fixation times, nonradioactive thymidine did not affect the yield of x-ray-induced aberrations. The same phenomenon occurred at earlier fixation times, after exposure to 30 or 40 rad of x-rays and [3H]thymidine. This response is analogous to the adaptive response to alkylating agents whereby prior treatment with small doses for a long period reduces the damage occurring from large doses of similar agents given for a short time.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Olivieri, G -- Bodycote, J -- Wolff, S -- New York, N.Y. -- Science. 1984 Feb 10;223(4636):594-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6695170" target="_blank"〉PubMed〈/a〉
    Keywords: Cells, Cultured ; *Chromosome Aberrations ; Chromosome Deletion ; Humans ; Lymphocytes/drug effects/physiology/*radiation effects ; Metaphase/drug effects/radiation effects ; Thymidine/*toxicity ; Tritium
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  • 25
    Publication Date: 1984-03-23
    Description: Interferon-beta 1 (IFN-beta 1) complementary DNA was used as a hybridization probe to isolate human genomic DNA clones lambda B3 and lambda B4 from a human genomic DNA library. Blot-hybridization procedures and partial nucleotide sequencing revealed that lambda B3 is related to IFN-beta 1 (and more distantly to IFN-alpha 1). Analyses of DNA obtained from a panel of human-rodent somatic cell hybrids that were probed with DNA derived from lambda B3 showed that lambda B3 is on human chromosome 2. Similar experiments indicated that lambda B4 is not on human chromosomes 2, 5, or 9. The finding that DNA related to the IFN-beta 1 gene (and IFN-alpha 1 gene) is dispersed in the human genome raises new questions about the origins of the interferon genes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sagar, A D -- Sehgal, P B -- May, L T -- Inouye, M -- Slate, D L -- Shulman, L -- Ruddle, F H -- AI-16262/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1984 Mar 23;223(4642):1312-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6546621" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Chromosome Mapping ; Chromosomes, Human/*analysis ; Chromosomes, Human, 1-3 ; Chromosomes, Human, 4-5 ; Chromosomes, Human, 6-12 and X ; Cloning, Molecular ; Cricetinae ; DNA/*analysis ; *Genes ; Humans ; Hybrid Cells ; Interferon Type I/*genetics ; Mice ; Nucleic Acid Hybridization
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  • 26
    Publication Date: 1984-02-17
    Description: Cell-free conditioned media from human T cells transformed by human T-cell leukemia-lymphoma virus (HTLV-I) were tested for the production of soluble biologically active factors, including several known lymphokines. The cell lines used were established from patients with T-cell leukemia-lymphoma and from human umbilical cord blood and bone marrow leukocytes transformed by HTLV-I in vitro. All of the cell lines liberated constitutively one or more of the 12 biological activities assayed. These included macrophage migration inhibitory factor (MIF), leukocyte migration inhibitory factor (LIF), leukocyte migration enhancing factor (MEF), macrophage activating factor (MAF), differentiation inducing factor (DIF), colony stimulating factor (CSF), eosinophil growth and maturation activity (eos. GMA), fibroblast activating factor (FAF), gamma-interferon and, in rare instances, T-cell growth factor (TCGF). Some cell lines produced interleukin 3 (IL-3), platelet-derived growth factor (PDGF), or B-cell growth factors (BCGF). Such cells should prove useful for the production of lymphokines and as sources of specific messenger RNA's for their genetic cloning.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Salahuddin, S Z -- Markham, P D -- Lindner, S G -- Gootenberg, J -- Popovic, M -- Hemmi, H -- Sarin, P S -- Gallo, R C -- New York, N.Y. -- Science. 1984 Feb 17;223(4637):703-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6320367" target="_blank"〉PubMed〈/a〉
    Keywords: Antibodies, Monoclonal ; Antigens, Neoplasm/analysis ; Bone Marrow ; Cell Line ; *Cell Transformation, Neoplastic ; Cells, Cultured ; Deltaretrovirus/*genetics ; Female ; Humans ; Leukemia/*microbiology ; Lymphokines/*biosynthesis ; Lymphoma/*microbiology ; Phenotype ; Pregnancy ; T-Lymphocytes/*immunology
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  • 27
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-09-21
    Description: On the basis of an analysis of the human and rat calcitonin genes and of a related gene, alternative RNA processing represents a developmental strategy of the brain to dictate tissue-specific patterns of polypeptide synthesis. This regulation allows the calcitonin gene to generate two messenger RNA's, one encoding the precursor of a novel neuropeptide, referred to as CGRP, which predominates in the brain, and the second encoding the precursor to the hormone calcitonin which predominates in thyroid C cells. The distribution of CGRP in the central and peripheral nervous system and in endocrine and other organ systems suggests potential functions in nociception, ingestive behavior, cardiovascular homeostasis, and mineral metabolism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rosenfeld, M G -- Amara, S G -- Evans, R M -- New York, N.Y. -- Science. 1984 Sep 21;225(4668):1315-20.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6089345" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Calcitonin/*genetics ; Calcitonin Gene-Related Peptide ; Cloning, Molecular ; DNA/analysis ; DNA Restriction Enzymes ; *Genes ; Nerve Tissue Proteins/*genetics ; Neurons/*metabolism ; Phenotype ; *RNA Processing, Post-Transcriptional ; RNA, Messenger/*genetics ; Rats
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  • 28
    Publication Date: 1984-11-16
    Description: The benzodiazepine-gamma-aminobutyric acid receptor complex was used to study functional receptor synthesis and degradation in primary cultures of neurons. Fifty percent of the receptors turned over with an unusually rapid half-life (4 hours); this was followed by a second, slower phase (32 hours). These results provide the basis for elucidating the mechanism by which neurons derived from the central nervous system control neurotransmitter receptor number, an important problem in cellular neurobiology. The findings may be of significance in the study of neurological and psychiatric disorders.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Borden, L A -- Czajkowski, C -- Chan, C Y -- Farb, D H -- New York, N.Y. -- Science. 1984 Nov 16;226(4676):857-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6093257" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Chick Embryo ; Flunitrazepam/metabolism ; Half-Life ; Kinetics ; Neurons/*metabolism ; Receptors, GABA-A/biosynthesis/*metabolism ; Spinal Cord/cytology ; gamma-Aminobutyric Acid/physiology
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  • 29
    Publication Date: 1984-06-08
    Description: An H1 histone gene was isolated from a 15-kilobase human DNA genomic sequence. The presence of H2A, H2B, H3, and H4 genes in this same 15-kilobase fragment indicates that mammalian core and H1 histone genes are clustered.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Carozzi, N -- Marashi, F -- Plumb, M -- Zimmerman, S -- Zimmerman, A -- Coles, L S -- Wells, J R -- Stein, G -- Stein, J -- GM 32010/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1984 Jun 8;224(4653):1115-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6719136" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; DNA/genetics ; *Genes ; HeLa Cells ; Histones/*genetics ; Humans ; Nucleic Acid Hybridization ; Rabbits ; Trout ; Xenopus
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  • 30
    Publication Date: 1984-11-30
    Description: Complementary DNA clones of genes induced by platelet-derived growth factor (PDGF) in BALB/c-3T3 cells were isolated; one such clone contains a domain having nucleotide sequence homology with the third exon of c-fos. This nucleotide sequence homology is reflected in the predicted amino acid sequences of the gene products. Under low stringency conditions, the mouse v-fos gene cross-hybridizes with the PDGF-inducible complementary DNA clone. However, the messenger RNA transcripts of mouse c-fos and the new fos-related gene can be distinguished by gel electrophoresis and by S1 nuclease analysis. Expression of the authentic c-fos gene is induced by PDGF and superinduced by the combination of PDGF and cycloheximide.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cochran, B H -- Zullo, J -- Verma, I M -- Stiles, C D -- New York, N.Y. -- Science. 1984 Nov 30;226(4678):1080-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6093261" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Cells, Cultured ; *Cloning, Molecular ; DNA/analysis ; DNA Restriction Enzymes ; DNA Transposable Elements ; Endonucleases ; Genes/drug effects ; Mice ; Mice, Inbred BALB C ; Nucleic Acid Hybridization ; Oncogenes/*drug effects ; Platelet-Derived Growth Factor/*pharmacology ; Single-Strand Specific DNA and RNA Endonucleases ; Transcription, Genetic/drug effects
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  • 31
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-05-11
    Description: Protozoan parasites of the genus Cryptosporidium cause a short-term, flu-like, gastrointestinal illness in immunocompetent persons and severe, persistent, life-threatening diarrhea in immunodeficient individuals. No effective therapy is available for the treatment of cryptosporidiosis in the immunodeficient host. Complete development (from sporozoite to sporulated oocyst) of a human isolate of Cryptosporidium was achieved in cultured human fetal lung cells and primary chicken kidney and porcine kidney cells. The growth of this newly recognized zoonotic agent in cell culture now provides a means of studying its behavior, development, and metabolism, and a mechanism for evaluation of potentially useful therapeutic agents.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Current, W L -- Haynes, T B -- New York, N.Y. -- Science. 1984 May 11;224(4649):603-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6710159" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/complications ; Animals ; Cattle ; Cells, Cultured ; Coccidia/*growth & development ; Coccidiosis/etiology/parasitology ; Culture Media ; Humans ; Mice
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  • 32
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-12-07
    Description: An assay was developed to detect recombination events taking place in an in vitro reaction. Extracts of cultured mouse preB lymphocytes were found to catalyze homologous recombination between substrate DNA molecules but not site-specific recombination between cloned mouse immunoglobulin D and J genes. Addition of deoxyribonucleoside triphosphates increased the frequency of homologous recombination. This recombination activity was not observed in two differentiated lymphocyte cell lines.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Darby, V -- Blattner, F -- AI19325/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1984 Dec 7;226(4679):1213-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6334360" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; B-Lymphocytes ; Cells, Cultured ; Crossing Over, Genetic ; DNA, Viral ; Immunoglobulin Variable Region/genetics ; Mice ; Mutation ; Nucleoproteins/genetics ; *Recombination, Genetic
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  • 33
    Publication Date: 1984-01-06
    Description: Cultures derived from rat cerebral hemispheres were sequentially stained for acetylcholinesterase activity and for either somatostatin-like immunoreactivity or cholecystokinin-like immunoreactivity. Somatostatin-like immunoreactivity was found to coexist with acetylcholinesterase activity in individual neurons of several morphological subtypes, but cholecystokinin-like immunoreactivity and acetycholinesterase activity were never seen in the same neurons. These findings suggest a specific anatomical association, perhaps even an overlap, of the cholinergic and somatostatinergic systems in the mammalian cerebrum, and indicate that the combined deficiencies of somatostatin and cholinergic markers in Alzheimer's dementia and senile dementia of the Alzheimer type may be of pathophysiological importance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Delfs, J R -- Zhu, C H -- Dichter, M A -- HD06276/HD/NICHD NIH HHS/ -- NS00608/NS/NINDS NIH HHS/ -- NS15362/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1984 Jan 6;223(4631):61-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6140757" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylcholinesterase/*metabolism ; Animals ; Brain/*cytology/enzymology ; Brain Chemistry ; Cells, Cultured ; Fluorescent Antibody Technique ; Neurons/*analysis/enzymology ; Rats ; Sincalide/analysis ; Somatostatin/*analysis
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  • 34
    Publication Date: 1984-08-10
    Description: A clone of complementary DNA encoding the circumsporozoite (CS) protein of the human malaria parasite Plasmodium falciparum has been isolated by screening an Escherichia coli complementary DNA library with a monoclonal antibody to the CS protein. The DNA sequence of the complementary DNA insert encodes a four-amino acid sequence: proline-asparagine-alanine-asparagine, tandemly repeated 23 times. The CS beta-lactamase fusion protein specifically binds monoclonal antibodies to the CS protein and inhibits the binding of these antibodies to native Plasmodium falciparum CS protein. These findings provide a basis for the development of a vaccine against Plasmodium falciparum malaria.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Enea, V -- Ellis, J -- Zavala, F -- Arnot, D E -- Asavanich, A -- Masuda, A -- Quakyi, I -- Nussenzweig, R S -- New York, N.Y. -- Science. 1984 Aug 10;225(4662):628-30.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6204384" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Antibodies, Monoclonal/immunology ; Antigens, Surface/*genetics/immunology ; *Cloning, Molecular ; DNA/genetics ; Epitopes/*genetics ; *Genes ; Malaria/immunology ; Plasmodium falciparum/*genetics ; *Protozoan Proteins ; *Repetitive Sequences, Nucleic Acid
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  • 35
    Publication Date: 1984-08-10
    Description: Measurement of hepatic apolipoprotein II and vitellogenin II messenger RNA during chicken embryogenesis showed that these genes acquire estrogen responsiveness at different stages of development. Sensitive solution hybridization assays with excess complementary DNA showed that apolipoprotein II transcripts were induced to 500 molecules per cell at day 9, whereas induction of vitellogenin II messenger RNA was not found until day 11. Thus, two estrogen regulated genes of common function and coordinately regulated in the adult may be on independent developmental programs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Elbrecht, A -- Lazier, C B -- Protter, A A -- Williams, D L -- AM 18171/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1984 Aug 10;225(4662):639-41.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6740331" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apolipoproteins/analysis/genetics ; Apolipoproteins B ; Chick Embryo ; Estrogens/*physiology ; *Gene Expression Regulation ; *Genes ; Liver/analysis/embryology ; RNA, Messenger/genetics ; Receptors, Estrogen/metabolism ; Vitellogenins/analysis/genetics
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  • 36
    Publication Date: 1984-02-10
    Description: Cells of the 10T 1/2 mouse fibroblast line transformed in vitro by ultraviolet radiation are antigenically similar to those from skin cancers produced in mice by repeated exposure to ultraviolet radiation. Both types of tumor cells grew preferentially in ultraviolet-irradiated syngeneic mice relative to untreated animals, and both were recognized by ultraviolet radiation-induced tumor-specific suppressor lymphocytes. These properties were not shared by 10T 1/2 cells transformed in vitro by x-rays or 3-methylcholanthrene.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fisher, M S -- Kripke, M L -- Chan, G L -- CA-09078/CA/NCI NIH HHS/ -- CA-11751/CA/NCI NIH HHS/ -- N01-CO-23909/CO/NCI NIH HHS/ -- New York, N.Y. -- Science. 1984 Feb 10;223(4636):593-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6695169" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, Neoplasm/*analysis ; Carcinogens ; Cell Line ; *Cell Transformation, Neoplastic ; Cells, Cultured ; Mice ; Mice, Inbred C3H ; Neoplasm Transplantation ; Transplantation, Isogeneic ; *Ultraviolet Rays
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  • 37
    Publication Date: 1984-05-25
    Description: A pool of synthetic oligonucleotides was prepared based on the amino terminal amino acid sequence of tetanus toxin. This probe hybridized to plasmid DNA isolated from three toxigenic strains of Clostridium tetani but not to plasmid DNA from a nontoxigenic strain. These results show that the structural gene for the toxin is on the plasmid. The pCL1 plasmid from one of the toxigenic strains spontaneously deleted 22 kilobase pairs of DNA to form pCL2. Strains harboring this deleted plasmid are nontoxigenic. However, the probe mixture hybridized to pCL2, indicating that the DNA encoding the amino terminus of the toxin had not been deleted. Restriction endonuclease cleavage maps of pCL1 and pCL2 were constructed and indicate the approximate location and orientation of the structural gene for tetanus toxin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Finn, C W Jr -- Silver, R P -- Habig, W H -- Hardegree, M C -- Zon, G -- Garon, C F -- New York, N.Y. -- Science. 1984 May 25;224(4651):881-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6326263" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; DNA Restriction Enzymes ; *Genes ; Nucleic Acid Hybridization ; *Plasmids ; Tetanus Toxin/*genetics
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  • 38
    Publication Date: 1984-04-13
    Description: We have found that a portion (150 base pairs) of the seventh exon of the human gamma fibrinogen gene is duplicated in the preceding intron. This duplicated sequence, termed a "pseudoexon," is flanked on each side by a single-copy inverted repeat sequence consisting of 102 base pairs. Frequencies of point substitutions indicate that both the pseudoexon and the inverted repeat sequence arose approximately 10 to 20 million years ago. The generality of this type of duplication is suggested by the occurrence of a similar duplication in the mouse immunoglobulin mu-delta region. As in the fibrinogen pseudoexon, the portion of the immunoglobulin mu-delta region containing the duplication and the inverted repeat was reported to be single-copy in the mouse genome. Since both of the first two single-copy inverted repeats to be sequenced are associated with regional duplications, it is likely that many of the single-copy inverted repeat sequences, which make up 1 to 2 percent of the genome, are also associated with regional duplications.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fornace, A J Jr -- Cummings, D E -- Comeau, C M -- Kant, J A -- Crabtree, G R -- New York, N.Y. -- Science. 1984 Apr 13;224(4645):161-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6322310" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; DNA/genetics ; DNA Replication ; DNA Transposable Elements ; Fibrinogen/*genetics ; *Genes ; Genes, MHC Class II ; Humans ; Immunoglobulins/*genetics ; Mice ; Nucleic Acid Hybridization ; Rats ; *Repetitive Sequences, Nucleic Acid
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  • 39
    Publication Date: 1984-09-14
    Description: Mouse tumors induced by gamma radiation are a useful model system for oncogenesis. DNA from such tumors contains an activated K-ras oncogene that can transform NIH 3T3 cells. This report describes the cloning of a fragment of the mouse K-ras oncogene containing the first exon from both a transformant in rat-2 cells and the brain of the same mouse that developed the tumor. Hybrid constructs containing one of the two pieces were made and only the plasmid including the first exon from the transformant gave rise to foci in NIH 3T3 cells. There was only a single base difference (G----A) in the exonic sequence, which changed glycine to aspartic acid in the transformant. By use of a synthetic oligonucleotide the presence of the mutation was demonstrated in the original tumor, ruling out modifications during DNA-mediated gene transfer and indicating that the alteration was present in the thymic lymphoma but absent from other nonmalignant tissue. The results are compatible with gamma radiation being a source of point mutations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Guerrero, I -- Villasante, A -- Corces, V -- Pellicer, A -- CA-36327/CA/NCI NIH HHS/ -- GM-32036/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1984 Sep 14;225(4667):1159-62.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6474169" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Cell Transformation, Neoplastic ; Cells, Cultured ; Cloning, Molecular ; Gamma Rays ; Lymphoma/*genetics ; Mice ; Mutation ; Neoplasms, Radiation-Induced/*genetics ; Nucleic Acid Hybridization ; *Oncogenes ; Rats
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  • 40
    Publication Date: 1984-09-21
    Description: Recombinant DNA technology has provided a vast new source of DNA markers displaying heritable sequence variation in humans. These markers can be used in family studies to identify the chromosomal location of defective genes causing nervous system disorders. The discovery of a DNA marker linked to Huntington's disease has opened new avenues of research into this disorder and may ultimately permit cloning and characterization of the defective gene.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gusella, J F -- Tanzi, R E -- Anderson, M A -- Hobbs, W -- Gibbons, K -- Raschtchian, R -- Gilliam, T C -- Wallace, M R -- Wexler, N S -- Conneally, P M -- NS16367/NS/NINDS NIH HHS/ -- NS20012/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1984 Sep 21;225(4668):1320-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6089346" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Base Sequence ; Chromosome Mapping ; Cloning, Molecular ; DNA/*genetics ; DNA Restriction Enzymes ; *DNA, Recombinant ; Female ; *Genes ; *Genetic Linkage ; *Genetic Markers ; Genetic Vectors ; Humans ; Huntington Disease/*genetics ; Male ; Mutation ; Pedigree ; Phenotype ; Polymorphism, Genetic
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  • 41
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-03-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G -- New York, N.Y. -- Science. 1984 Mar 30;223(4643):1376, 1378-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6367045" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Deaminase/deficiency ; Anemia, Sickle Cell/therapy ; Animals ; Bone Marrow Transplantation ; *Genes ; Genetic Diseases, Inborn/*therapy ; Humans ; Mice ; Retroviridae ; Thalassemia/therapy
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  • 42
    Publication Date: 1984-02-10
    Description: Data are presented suggesting a resolution to the paradox concerning the murine response subregion I-J, which encodes a suppressor T cell marker. The controversy arose when sequences corresponding to I-J DNA were not found in the central immune response region described by immunogeneticists. New evidence is presented that T cell surface I-J expression results from the action of at least two complementing genes. One gene is within the H-2 region on chromosome 17; the second gene, termed Jt, is on chromosome 4. The two recombinant mouse strains B10.A(3R) and B10.A(5R) originally used to define the I-J subregion apparently differ not within the H-2 region but elsewhere.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hayes, C E -- Klyczek, K K -- Krum, D P -- Whitcomb, R M -- Hullett, D A -- Cantor, H -- CA34106/CA/NCI NIH HHS/ -- T 32 CA 09106/CA/NCI NIH HHS/ -- T 32 GM 07215/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1984 Feb 10;223(4636):559-63.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6607530" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal ; Antigens, Surface/*genetics ; Chromosome Mapping ; *Genes ; *Major Histocompatibility Complex ; Mice ; Mice, Inbred Strains ; Species Specificity ; T-Lymphocytes/*immunology
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  • 43
    Publication Date: 1984-10-05
    Description: Physiological properties of acetylcholine receptors on muscle cells at very early stages of ontogeny were compared with those of cells at later stages. Two changes were observed that contributed to an overall shortening of the mean open time of single-channels. First, there was a shift in the relative proportions of two receptor types with different conductances and mean open times, such that the contribution of receptors with large conductance and short open time increased as development proceeded. Second, there was a sharp reduction in the mean open time of channels having small conductance, with no similar change in channels having large conductance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Leonard, R J -- Nakajima, S -- Nakajima, Y -- Takahashi, T -- NS08601/NS/NINDS NIH HHS/ -- T32-GM-07211/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1984 Oct 5;226(4670):55-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6474189" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Electric Conductivity ; Muscles/*embryology/physiology ; Receptors, Cholinergic/*physiology ; Xenopus
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  • 44
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-10-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lewin, R -- New York, N.Y. -- Science. 1984 Oct 5;226(4670):35.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6236555" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Cattle ; Eye Proteins/genetics ; *Genes ; Humans ; Photoreceptor Cells/analysis ; Protein Conformation ; Retinal Pigments/*genetics ; Rhodopsin/analysis/*genetics ; Rod Opsins
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  • 45
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-11-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lewin, R -- New York, N.Y. -- Science. 1984 Nov 23;226(4677):955.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6505675" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; DNA, Mitochondrial/genetics ; Female ; *Genes ; Male ; Mice/*genetics ; Ranidae/*genetics ; Species Specificity
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  • 46
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-08-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1984 Aug 10;225(4662):607-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6429857" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, Surface/*genetics/immunology ; *Cloning, Molecular ; *Genes ; Haplorhini ; Humans ; Malaria/*immunology ; Plasmodium falciparum/*genetics/immunology ; *Protozoan Proteins
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  • 47
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-07-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1984 Jul 13;225(4658):155.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6729474" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Genes ; Mice ; Receptors, Antigen, T-Cell/*genetics
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  • 48
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-02-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, J L -- New York, N.Y. -- Science. 1984 Feb 10;223(4636):573-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6229878" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, Surface/*genetics ; *Genes ; *Major Histocompatibility Complex ; Mice ; T-Lymphocytes, Regulatory/*immunology
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  • 49
    Publication Date: 1984-08-10
    Description: Mung bean nuclease was found to cut the genomic DNA of the malaria parasite Plasmodium at positions before and after genes but not within gene-coding regions. This cleavage, which had nearly the preciseness of a restriction nuclease, required controlled conditions in the presence of formamide. Southern blot analysis showed that the coding areas for Plasmodium actin, circumsporozoite protein, histidine-rich protein, ribosomal RNA's, and tubulin are each cleaved from genomic DNA to yield a single major band on an agarose gel. DNA sequence data on several clones of mung bean nuclease cleavage products containing the gene for the circumsporozoite protein of Plasmodium falciparum confirmed that cleavage sites are before and after genes. Recognition and cleavage of DNA did not seem to be related to any primary sequence but may be related to structural features of the DNA duplex that demarcate genes. Mung bean nuclease-cleaved DNA could be inserted directly into a lambda expression vector, yielding a representative but small gene bank of intact gene fragments.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McCutchan, T F -- Hansen, J L -- Dame, J B -- Mullins, J A -- New York, N.Y. -- Science. 1984 Aug 10;225(4662):625-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6330899" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal/metabolism ; Antigens, Surface/genetics ; DNA/isolation & purification/*metabolism ; Electrophoresis, Agar Gel ; Endonucleases/*metabolism ; *Genes ; Macaca mulatta ; Plasmodium falciparum/*genetics ; *Protozoan Proteins ; Single-Strand Specific DNA and RNA Endonucleases
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  • 50
    Publication Date: 1984-01-13
    Description: Stimulation of cultures of murine bone-marrow cells with specific macrophage growth factor (colony-stimulating factor I) resulted in the production of type I interferon. Neutralization of this endogenous interferon by antiserum directed against interferons alpha and beta resulted in a significant enhancement of mononuclear phagocyte proliferation from committed marrow precursors. The effect of the antiserum was lost in cultures depleted of adherent cells, an indication that an adherent regulatory cell (or cells) in the marrow limits mononuclear phagocyte proliferation by producing antiproliferative interferon in response to high levels of specific growth factor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moore, R N -- Larsen, H S -- Horohov, D W -- Rouse, B T -- AI-14981/AI/NIAID NIH HHS/ -- AI-18960/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1984 Jan 13;223(4632):178-81.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6606850" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone Marrow ; Cell Division ; Cells, Cultured ; Clone Cells ; Colony-Stimulating Factors/*pharmacology ; Immune Sera ; Interferon Type I/biosynthesis/immunology/*physiology ; Macrophages/*cytology/physiology ; Mice ; Thymidine/metabolism
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  • 51
    Publication Date: 1984-07-27
    Description: Mutants of Sindbis virus were selected for rapid growth in baby hamster kidney (BHK) cell cultures and screened for attenuation of virulence in suckling mice. Comparisons among independently isolated virulent and attenuated strains, as well as a classical reversion analysis, showed that accelerated penetration of BHK cells was correlated with attenuation in vivo. Both phenotypic changes resulted from a reorganization of virion structure as detected by monoclonal antibodies. These results suggest that mutants selected for rapid growth in cell culture may be useful as attenuated vaccines and for studies of the molecular basis of virus pathogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Olmsted, R A -- Baric, R S -- Sawyer, B A -- Johnston, R E -- AI19433/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1984 Jul 27;225(4660):424-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6204381" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal/immunology ; Antibodies, Viral/immunology ; Cells, Cultured ; Cricetinae ; Kidney/cytology ; Mice ; Mutation ; Neutralization Tests ; RNA/biosynthesis ; Sindbis Virus/genetics/growth & development/immunology/*pathogenicity ; Togaviridae Infections/microbiology
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  • 52
    Publication Date: 1984-05-25
    Description: Cultured fibroblasts obtained from patients with tissue resistance to 1,25-dihydroxyvitamin D3 (vitamin D3--dependent rickets, type II) contain normal, low, or undetectable concentrations of this hormone's receptor protein as measured by a ligand-binding assay. Extracts from these cells were evaluated for receptors by immunoassay with a recently developed monoclonal antibody to the chick receptor. The results show that a protein sedimenting at 3.7S and recognizable by the antibody exists in comparable concentrations in cells from both normal and resistant patients, irrespective of the hormone-binding abnormalities of the cells. This implies that deficiencies in hormone binding associated with inherited tissue resistance to 1,25-dihydroxyvitamin D3 probably arise from structural variations in the receptor molecule and not from defective receptor synthesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pike, J W -- Dokoh, S -- Haussler, M R -- Liberman, U A -- Marx, S J -- Eil, C -- AM 15781/AM/NIADDK NIH HHS/ -- AM 32313/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1984 May 25;224(4651):879-81.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6326262" target="_blank"〉PubMed〈/a〉
    Keywords: Antibodies, Monoclonal ; Cells, Cultured ; Fibroblasts/*analysis ; Humans ; Hypophosphatemia, Familial/*metabolism ; Radioimmunoassay ; Radioligand Assay ; Receptors, Calcitriol ; Receptors, Steroid/*analysis ; Skin/cytology
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  • 53
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-09-14
    Description: Exposure to insulin increased stimulus-evoked transmission at synapses formed in culture by cholinergic retinal neurons derived from fetal rats. This effect occurred at physiological concentrations and was long lasting. The findings support the hypothesis that insulin may serve as a developmental signal to regulate the emergence of effective neurotransmission across nascent synapses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Puro, D G -- Agardh, E -- New York, N.Y. -- Science. 1984 Sep 14;225(4667):1170-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6089343" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Insulin/pharmacology/*physiology ; Muscles ; Neurons/*growth & development/physiology ; Parasympathetic Nervous System/physiology ; Rats ; Retina ; Synaptic Transmission ; Time Factors
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  • 54
    Publication Date: 1984-01-13
    Description: T-cell growth factor (TCGF) or interleukin-2 (IL-2), an immunoregulatory lymphokine, is produced by lectin- or antigen-activated mature T lymphocytes and in a constitutive manner by certain T-cell lymphoma cell lines. By means of a molecular clone of human TCGF and DNA extracted from a panel of somatic cell hybrids (rodent cells X normal human lymphocytes), the TCGF structural gene was identified on human chromosome 4. In situ hybridization of the TCGF clone to human chromosomes resulted in significant labeling of the midportion of the long arm of chromosome 4, indicating that the TCGF gene was located at band q26-28. Genomic DNA from a panel of hybrids prepared with HUT-102 B2 cells was examined with the same molecular clone. In this clone of cells, which produces human T-cell leukemia virus, the TCGF gene was also located on chromosome 4 and was apparently not rearranged. The homologous TCGF locus in the domestic cat was assigned to chromosome B1 by using a somatic cell hybrid panel that segregates cat chromosomes. Linkage studies as well as high-resolution G-trypsin banding indicate that this feline chromosome is partially homologous to human chromosome 4.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Seigel, L J -- Harper, M E -- Wong-Staal, F -- Gallo, R C -- Nash, W G -- O'Brien, S J -- New York, N.Y. -- Science. 1984 Jan 13;223(4632):175-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6318318" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cats/*genetics ; Chromosome Banding ; Chromosome Mapping ; *Chromosomes ; *Chromosomes, Human, 4-5 ; Cloning, Molecular ; Deltaretrovirus ; *Genes ; Genetic Linkage ; Humans ; Hybrid Cells ; Interleukin-2/*genetics ; Nucleic Acid Hybridization
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 55
    Publication Date: 1984-11-16
    Description: Multicellular spheroids were grown from mixtures of rat brain tumor cells sensitive (9L) and resistant (R3) to 1,3-bis(2-chloroethyl)-1-nitrosourea. Percentages of each cell subpopulation in these spheroids were estimated with the sister chromatid exchange assay and were found to be approximately the same as those used to initiate spheroids. Spheroids grown from 9L cells alone had a higher growth rate than spheroids grown from R3 cells alone. However, the growth rate of mixed-cell spheroids was essentially the same as that of pure 9L spheroids and was independent of the percentages of R3 cells in mixed-cell spheroids. The sensitivity of 9L cells in mixed-cell spheroids treated with 1,3-bis(2-chloroethyl)-1-nitrosourea, estimated by changes in the number of sister chromatid exchanges per metaphase induced by treatment, decreased as the percentage of R3 cells increased. These effects are probably the result of an interaction between the two cell subpopulations held in three-dimensional contact, a situation similar to that in tumors in situ. The results suggest why one cell subpopulation of tumors does not become dominant during growth and indicate that interactions between cell subpopulations can influence the sensitivity of one subpopulation to 1,3-bis(2-chloroethyl)-1-nitrosourea.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tofilon, P J -- Buckley, N -- Deen, D F -- CA-09215/CA/NCI NIH HHS/ -- CA-31867/CA/NCI NIH HHS/ -- CA-31868/CA/NCI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1984 Nov 16;226(4676):862-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6494917" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carmustine/pharmacology ; Cell Division/*drug effects ; Cells, Cultured ; Drug Resistance ; Male ; Neoplasms, Experimental/*physiopathology ; Rats ; Sister Chromatid Exchange/drug effects
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  • 56
    Publication Date: 1984-11-30
    Description: A gene coding for the major histocompatibility antigen HLA-A2 was transferred into human HLA-A2 negative M1 cells and murine L cells. Following transfection, these cells expressed molecules at the cell surface that are biochemically indistinguishable from HLA-A2 antigens on the human cell line JY from which the HLA-A2 gene was isolated. The M1A2 cells were recognized and lysed by a cytolytic T-cell clone specific for HLA-A2. The transfected L cells which express HLA-A2 in association with human beta 2-microglobulin were not lysed by this T-cell clone. The specific cytolysis of M1A2 cells could be inhibited by monoclonal antibodies to HLA-A2, and monoclonal antibodies to T3, T8, and LFA-1 on cytotoxic T lymphocytes. These results suggest that killing by allospecific T cells requires HLA-A2 antigens as well as other species-specific structures on the target cell surface.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉van de Rijn, M -- Bernabeu, C -- Royer-Pokora, B -- Weiss, J -- Seidman, J G -- de Vries, J -- Spits, H -- Terhorst, C -- AI 19148/AI/NIAID NIH HHS/ -- AI-15066/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1984 Nov 30;226(4678):1083-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6333726" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cytotoxicity, Immunologic ; *Genes ; HLA Antigens/*genetics ; HLA-A2 Antigen ; Humans ; L Cells (Cell Line)/immunology ; *Major Histocompatibility Complex ; Mice ; T-Lymphocytes, Cytotoxic/*immunology ; *Transfection
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 57
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-04-06
    Description: Indirect immunofluorescence was used to show the presence of galactocerebroside (galC), a lipid found in myelin, on the surface of about half of the Schwann cells isolated from neonatal rat sciatic nerves and cultured for 1 day without neurons. By day 4 in vitro, the Schwann cells had all lost their surface galC. Three days after beginning treatment with 10(-3) molar 8-bromo-adenosine 3',5'-monophosphate (8-bromo cyclic AMP) or N6,O2'-dibutyryl adenosine 3',5'-monophosphate (dibutyryl cyclic AMP), galC reappeared on the Schwann cells, and 2 days later 48 percent of the cultured Schwann cells showed surface galC. Tritium from tritiated D-galactose was incorporated into galC by the 8-bromo cyclic AMP-and dibutyryl cyclic AMP-treated cultures at a rate 15 times the control rate.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sobue, G -- Pleasure, D -- HD08536/HD/NICHD NIH HHS/ -- NS08075/NS/NINDS NIH HHS/ -- NS11037/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1984 Apr 6;224(4644):72-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6322307" target="_blank"〉PubMed〈/a〉
    Keywords: 8-Bromo Cyclic Adenosine Monophosphate/pharmacology ; Adenosine Monophosphate/*analogs & derivatives ; Animals ; Bucladesine/pharmacology ; Butyrates/pharmacology ; Butyric Acid ; Cells, Cultured ; Cerebrosides/*metabolism ; Fluorescent Antibody Technique ; Galactosylceramides/*metabolism ; Myelin Sheath/metabolism ; Rats ; Schwann Cells/*drug effects/metabolism ; Sciatic Nerve/metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 58
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-09-21
    Description: Some 30,000 genes are expressed exclusively in the rat brain, many of which contain a genetic element called an identifier sequence located in at least one of their introns. The identifier sequences are transcribed by RNA polymerase III exclusively in neurons to produce two RNA species, BC1 and BC2, of 160 and 100 to 110 nucleotides. This transcriptional event may define regions of chromatin that contain neuronal-specific genes and may poise these genes for transcription by polymerase II by rendering the gene promoters accessible to soluble trans-acting molecules.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sutcliffe, J G -- Milner, R J -- Gottesfeld, J M -- Reynolds, W -- GM32355/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1984 Sep 21;225(4668):1308-15.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6474179" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Brain/*metabolism ; Brain Stem/metabolism ; Cerebral Cortex/metabolism ; *Genes ; Neurons/*metabolism ; Nucleic Acid Conformation ; Operon ; Phenotype ; RNA Polymerase III/metabolism ; RNA, Messenger/genetics ; Rats ; Spinal Cord/metabolism ; Transcription, Genetic
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  • 59
    Publication Date: 1984-05-25
    Description: The effect of serum on the rate of substrate oxidation by dissociated brain cells in vitro was examined. At a serum protein concentration of approximately 0.55 milligram per milliliter, oxidation of [6-14C]glucose to 14CO2 was decreased more than 50 percent. Oxidation of [3-14C]-3-hydroxybutyrate and [U-14C]glutamine was decreased much less. Serum from cows, rats, horses, and humans produced similar effects, as did serum from young and old animals and from both sexes. The effect on [6-14C]glucose oxidation was proportional to serum protein concentration, and significant inhibitory activity was obtained with dialyzed serum. Heating (80 degrees C for 10 minutes) significantly reduced the inhibitory activity. These results suggest the presence of a factor in serum that can preferentially decrease glucose oxidation. Such a factor would have profound implications for metabolic regulation in vivo and for studies of cells in vitro in which serum is included in the growth medium.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tildon, J T -- Stevenson, J H -- New York, N.Y. -- Science. 1984 May 25;224(4651):903-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6719124" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Blood ; Brain/*metabolism ; Cells, Cultured ; *Culture Media ; Glucose/*metabolism ; Glutamine/metabolism ; Hydroxybutyrates/metabolism ; Oxidation-Reduction ; Rats ; Rats, Inbred Strains
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  • 60
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-12-07
    Description: Breaks were observed at 51 sites in homologous chromosomes in lymphocytes from ten humans and two great apes when cells were deprived of thymidine. The incidence of breaks was enhanced by caffeine, a substance that inhibits DNA repair in replicating cells. The locations of 20 sites were correlated with breakpoints that have been related to human malignancy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yunis, J J -- Soreng, A L -- New York, N.Y. -- Science. 1984 Dec 7;226(4679):1199-204.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6239375" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Animals ; Caffeine/pharmacology ; Cells, Cultured ; Child ; Chromosome Fragile Sites ; *Chromosome Fragility ; Chromosome Mapping ; Female ; Floxuridine/pharmacology ; Folic Acid/metabolism ; Gorilla gorilla ; Humans ; Male ; Middle Aged ; Neoplasms/*genetics ; Pan troglodytes ; Thymidine/metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 61
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-03-30
    Description: Sequential development of Leishmania promastigotes from a noninfective to an infective stage was demonstrated for promastigotes growing in culture and in the sandfly vector. The generation of an infective stage was found to be growth cycle-dependent and restricted to nondividing organisms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sacks, D L -- Perkins, P V -- New York, N.Y. -- Science. 1984 Mar 30;223(4643):1417-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6701528" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Insect Vectors/parasitology ; Leishmania/growth & development/*physiology ; Leishmaniasis/parasitology/transmission ; Macrophages/parasitology ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Psychodidae/parasitology
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  • 62
    Publication Date: 1984-03-30
    Description: A small virus resembling parvoviruses in its morphological and physicochemical properties was derived from synovial tissue of a patient with severe rheumatoid arthritis. This virus, designated RA-1, elicits a syndrome in neonatal mice that includes neurological disturbances, permanent crippling of limbs, dwarfism, alopecia, blepharitis, "masking," and a rigid curvature of the thoracic spine. Polyclonal antibodies against RA-1 display high virus neutralizing activity and in immunoassays detect reactive antigen in synovial cells from different rheumatoid arthritis patients but not persons with osteoarthritis. Putative parvoviruses isolated from several other rheumatoid arthritis patients are only weakly pathogenic for newborn mice but can generate RA-1 virus-specific antigens in tissues of these animals. It has not been established that RA-1 and existing parvoviruses of mammalian species are related.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Simpson, R W -- McGinty, L -- Simon, L -- Smith, C A -- Godzeski, C W -- Boyd, R J -- AI-14359/AI/NIAID NIH HHS/ -- AI-17262/AI/NIAID NIH HHS/ -- AM-15796/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1984 Mar 30;223(4643):1425-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6701529" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn/microbiology ; Antibodies, Viral/immunology ; Arthritis, Rheumatoid/*microbiology ; Cells, Cultured ; Enzyme-Linked Immunosorbent Assay ; Humans ; Mice ; Microscopy, Electron ; Osteoarthritis/microbiology ; Parvoviridae/immunology/*isolation & purification/ultrastructure ; Rabbits ; Synovial Fluid/cytology/microbiology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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