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  • Articles  (43)
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  • Articles  (43)
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  • American Association for the Advancement of Science (AAAS)  (43)
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  • 1
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 1987-03-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barnes, D M -- New York, N.Y. -- Science. 1987 Mar 27;235(4796):1574-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3103218" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/*complications/drug therapy ; Antigens, Differentiation, T-Lymphocyte ; Antigens, Surface/analysis ; Cell Line ; Cell Transformation, Viral ; Encephalitis/*etiology/microbiology ; Glioma/microbiology ; Histocytochemistry ; Humans ; Macrophages/microbiology ; Membrane Proteins ; Microscopy, Electron ; Neuroglia/microbiology ; T-Lymphocytes/microbiology ; Thymidine/analogs & derivatives/therapeutic use ; Viral Proteins/analysis ; Zidovudine
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 1987-03-20
    Description: Elevation of glucose transport is an alteration common to most virally induced tumors. Rat fibroblasts transformed with wild-type or a temperature-sensitive Fujinami sarcoma virus (FSV) were studied in order to determine the mechanisms underlying the increased transport. Five- to tenfold increases in total cellular glucose transporter protein in response to transformation were accompanied by similar increases in transporter messenger RNA levels. This, in turn, was preceded by an absolute increase in the rate of glucose transporter gene transcription within 30 minutes after shift of the temperature-sensitive FSV-transformed cells to the permissive temperature. The transporter messenger RNA levels in transformed fibroblasts were higher than those found in proliferating cells maintained at the nonpermissive temperature. The activation of transporter gene transcription by transformation represents one of the earliest known effects of oncogenesis on the expression of a gene encoding a protein of well-defined function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Birnbaum, M J -- Haspel, H C -- Rosen, O M -- AM35430-01/AM/NIADDK NIH HHS/ -- DK 35158/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1987 Mar 20;235(4795):1495-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3029870" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Avian Sarcoma Viruses ; Cell Division ; Cell Line ; *Cell Transformation, Viral ; Fibroblasts ; Gene Expression Regulation ; Kinetics ; Monosaccharide Transport Proteins/*genetics ; RNA, Messenger/genetics ; Rats ; Transcription, Genetic
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 1987-07-10
    Description: A wide variety of human tumors contain an amplified or overexpressed erbB-2 gene, which encodes a growth factor receptor-like protein. When erbB-2 complementary DNA was expressed in NIH/3T3 cells under the control of the SV40 promoter, the gene lacked transforming activity despite expression of detectable levels of the erbB-2 protein. A further five- to tenfold increase in its expression under influence of the long terminal repeat of Moloney murine leukemia virus was associated with activation of erbB-2 as a potent oncogene. The high levels of the erbB-2 product associated with malignant transformation of NIH/3T3 cells were observed in human mammary tumor cells that overexpressed this gene. These findings demonstrate a new mechanism for acquisition of oncogenic properties by genes encoding growth factor receptor-like proteins and provide a functional basis for the role of their overexpression in the development of human malignancies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Di Fiore, P P -- Pierce, J H -- Kraus, M H -- Segatto, O -- King, C R -- Aaronson, S A -- New York, N.Y. -- Science. 1987 Jul 10;237(4811):178-82.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2885917" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Breast Neoplasms/genetics ; Cell Line ; *Cell Transformation, Neoplastic/genetics ; DNA/genetics ; Fibroblasts/*metabolism ; Gene Expression Regulation ; Genes, Viral ; Humans ; Mice ; Moloney murine leukemia virus/genetics ; Promoter Regions, Genetic ; Proto-Oncogene Proteins/biosynthesis/genetics/*physiology ; Rats ; Receptor, Epidermal Growth Factor ; Receptor, ErbB-2 ; Receptors, Cell Surface/genetics ; Recombinant Fusion Proteins/biosynthesis/genetics/physiology ; Simian virus 40/genetics ; Tumor Stem Cell Assay
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
    Publication Date: 1987-11-06
    Description: A model system for cytokine-induced up-regulation of human immunodeficiency virus type 1 (HIV-1) expression in chronically infected promonocyte clones was established. The parent promonocyte cell line U937 was chronically infected with HIV-1 and from this line a clone, U1, was derived. U1 showed minimal constitutive expression of HIV-1, but virus expression was markedly up-regulated by a phytohemagglutinin-induced supernatant containing multiple cytokines and by recombinant granulocyte/macrophage colony-stimulating factor alone. Recombinant interleukin-1 (IL-1), IL-2, interferon-gamma, and tumor necrosis factor-alpha did not up-regulate virus expression. Concomitant with the cytokine-induced up-regulation of HIV-1, expression of membrane-bound IL-1 beta was selectively induced in U1 in the absence of induction of other surface membrane proteins. This cytokine up-regulation of IL-1 beta was not seen in the uninfected parent U937 cell line. These studies have implications for the understanding of the mechanism of progression from a latent or low-level HIV-1 infection to a productive infection with resulting immunosuppression. In addition, this model can be used to delineate the potential mechanisms whereby HIV-1 infection regulates cellular gene expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Folks, T M -- Justement, J -- Kinter, A -- Dinarello, C A -- Fauci, A S -- New York, N.Y. -- Science. 1987 Nov 6;238(4828):800-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3313729" target="_blank"〉PubMed〈/a〉
    Keywords: Biological Products/*pharmacology ; Cell Line ; Clone Cells ; Cytokines ; HIV/drug effects/genetics/*growth & development ; Monocytes ; Recombinant Proteins/pharmacology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
    Publication Date: 1987-04-17
    Description: Many mutations leading to human disease are the result of single DNA base pair changes that cannot be identified by Southern analysis. This has prompted the development of alternative assays for point mutation detection. The recently described ribonuclease A cleavage procedure, with a polyuridylic acid-paper affinity chromatography step, has been used to identify the mutational lesions in the hypoxanthine phosphoribosyltransferase (HPRT) messenger RNAs of patients with Lesch-Nyhan syndrome. Distinctive ribonuclease A cleavage patterns were identified in messenger RNA from 5 of 14 Lesch-Nyhan patients who were chosen because no HPRT Southern or Northern blotting pattern changes had been found. This approach now allows HPRT mutation detection in 50 percent of the cases of Lesch-Nyhan syndrome. The polyuridylic acid-paper affinity procedure provides a general method for analysis of low abundance messenger RNAs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gibbs, R A -- Caskey, C T -- New York, N.Y. -- Science. 1987 Apr 17;236(4799):303-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3563511" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line ; Chromosome Deletion ; HeLa Cells/enzymology ; Humans ; Hypoxanthine Phosphoribosyltransferase/*genetics ; Lesch-Nyhan Syndrome/*genetics ; *Mutation ; Nucleic Acid Hybridization ; RNA, Messenger/genetics ; Ribonuclease, Pancreatic
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 6
    Publication Date: 1987-04-03
    Description: A gene, termed gli, was identified that is amplified more than 50-fold in a malignant glioma. The gene is expressed at high levels in the original tumor and its derived cell line and is located at chromosome 12 position (q13 to q14.3). The gli gene is a member of a select group of cellular genes that are genetically altered in primary human tumors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kinzler, K W -- Bigner, S H -- Bigner, D D -- Trent, J M -- Law, M L -- O'Brien, S J -- Wong, A J -- Vogelstein, B -- CA-09243/CA/NCI NIH HHS/ -- CA-43722/CA/NCI NIH HHS/ -- NS-20023/NS/NINDS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1987 Apr 3;236(4797):70-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3563490" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line ; *Chromosomes, Human, Pair 12 ; Cloning, Molecular ; DNA, Neoplasm/*genetics ; *Gene Amplification ; Gene Expression Regulation ; Glioma/*genetics ; Humans ; RNA, Messenger/genetics ; RNA, Neoplasm/genetics
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  • 7
    Publication Date: 1987-08-28
    Description: In order to identify the genetic factors associated with the radiation-resistant human laryngeal carcinoma cell line (SQ-20B), tumor cell DNA was transfected into NIH/3T3 cells. A high incidence (six out of six) of raf sequences was found in transfected NIH/3T3 clones and the tumorigenic potential of SQ-20B DNA could be linked to genomic fragments that represent most of the kinase domain of human c-raf-1. An apparently unaltered 3.5-kilobase pair (kb) human c-raf transcript was identified in SQ-20B cells but was not observed in the transfected NIH/3T3 cell clones. Two new transcripts (4.2 kb and 2.6 kb) were found in tumorigenic clones; the large transcript was missing in a very poorly tumorigenic clone. Cytogenetic analysis indicated that the normal autosomes of chromosome 3 were absent in SQ-20B karyotypes and had formed apparently stable marker chromosomes. Unlike the recipient NIH/3T3 cell line, 30 percent of the transformed clone-1 metaphases had minute and double-minute chromosomes representative of amplified DNA sequences. The frequency of the c-raf-1 identification by NIH/3T3 transfection of SQ-20B DNA suggests the presence of some genetic abnormality within this locus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kasid, U -- Pfeifer, A -- Weichselbaum, R R -- Dritschilo, A -- Mark, G E -- CA425969/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1987 Aug 28;237(4818):1039-41.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3616625" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; DNA, Neoplasm/genetics ; Humans ; Karyotyping ; Laryngeal Neoplasms/*genetics/radiotherapy ; Mice ; Mice, Nude ; Nucleic Acid Hybridization ; Oncogenes/*radiation effects ; Proto-Oncogenes/radiation effects ; *Radiation Tolerance
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1987-12-11
    Description: Vasoactive intestinal peptide (VIP) is a neuropeptide with broad tissue distribution. Although its precise function is unknown, it is thought to exert its effect, at least in part, by interacting with cell surface receptors. Nuclear receptors for VIP have now been identified by specific binding of 125I-labeled VIP to nuclei of a human colonic adenocarcinoma cell line (HT29) and by cross-linking of 125I-labeled VIP to its receptor on intact nuclei. In contrast, 125I-labeled transferrin shows only background binding to nuclei but significant binding to intact cells. Purity of the isolated nuclei was further substantiated by electron microscopy. The apparent molecular sizes of the VIP--cross-linked nuclear and cell surface receptors are similar but not identical.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Omary, M B -- Kagnoff, M F -- DK07202/DK/NIDDK NIH HHS/ -- DK35108/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1987 Dec 11;238(4833):1578-81.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of 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/2825352" target="_blank"〉PubMed〈/a〉
    Keywords: Adenocarcinoma/*metabolism/ultrastructure ; Cell Line ; Cell Nucleus/*metabolism/ultrastructure ; Colonic Neoplasms/*metabolism/ultrastructure ; Humans ; Kinetics ; Microscopy, Electron ; Receptors, Gastrointestinal Hormone/*metabolism ; Receptors, Vasoactive Intestinal Peptide ; Vasoactive Intestinal Peptide/*metabolism
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  • 9
    Publication Date: 1987-06-05
    Description: Cell cycle-dependent histone genes are transcribed at a basal level throughout the cell cycle, with a three- to fivefold increase during early S phase. Protein-DNA interactions in the 5' promoter region of a cell cycle-regulated human H4 histone gene have been analyzed at single-nucleotide resolution in vivo. This region contains two sites, with four potential protein-binding domains, at which the DNA is protected from reaction with dimethyl sulfate in cells and from digestion with deoxyribonuclease I in nuclei. These protein-DNA interactions persist during all phases of the cell cycle and dissociate with 0.16 to 0.2M sodium chloride.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pauli, U -- Chrysogelos, S -- Stein, G -- Stein, J -- Nick, H -- GM32010/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1987 Jun 5;236(4806):1308-11.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3035717" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Cell Cycle ; Cell Line ; Dna ; DNA Restriction Enzymes ; Deoxyribonuclease I ; Gene Expression Regulation ; Histones/*genetics ; Humans ; Nucleic Acid Hybridization ; *Promoter Regions, Genetic ; Protein Binding ; Sulfuric Acid Esters
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  • 10
    Publication Date: 1987-05-01
    Description: A partial amino acid sequence obtained for porcine atrial muscarinic acetylcholine receptor was used to isolate complementary DNA clones containing the complete receptor coding region. The deduced 466-amino acid polypeptide exhibits extensive structural and sequence homology with other receptors coupled to guanine nucleotide binding (G) proteins (for example, the beta-adrenergic receptor and rhodopsins); this similarity predicts a structure of seven membrane-spanning regions distinguished by the disposition of a large cytoplasmic domain. Stable transfection of the Chinese hamster ovary cell line with the atrial receptor complementary DNA leads to the binding of muscarinic antagonists in these cells with affinities characteristic of the M2 receptor subtype. The atrial muscarinic receptor is encoded by a unique gene consisting of a single coding exon and multiple, alternatively spliced 5' noncoding regions. The atrial receptor is distinct from the cerebral muscarinic receptor gene product, sharing only 38% overall amino acid homology and possessing a completely nonhomologous large cytoplasmic domain, suggesting a role for the latter region in differential effector coupling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peralta, E G -- Winslow, J W -- Peterson, G L -- Smith, D H -- Ashkenazi, A -- Ramachandran, J -- Schimerlik, M I -- Capon, D J -- CA16417/CA/NCI NIH HHS/ -- HL23632/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1987 May 1;236(4801):600-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3107123" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Cell Line ; DNA/genetics ; Exons ; GTP-Binding Proteins/metabolism ; Heart Atria/analysis ; Immunosorbent Techniques ; Membrane Proteins ; Molecular Weight ; Nucleic Acid Hybridization ; Peptide Fragments/metabolism ; Quinuclidinyl Benzilate/metabolism ; Receptors, Muscarinic/*genetics/metabolism ; Sequence Homology, Nucleic Acid ; Swine ; Transfection
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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