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  • Humans  (6)
  • American Association for the Advancement of Science (AAAS)  (6)
  • Blackwell Publishing Ltd
  • Springer
  • 1
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    Rational design of potent antagonists to the human growth hormone receptor (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-06-19
    Description: A hybrid receptor was constructed that contained the extracellular binding domain of the human growth hormone (hGH) receptor linked to the transmembrane and intracellular domains of the murine granulocyte colony-stimulating factor receptor. Addition of hGH to a myeloid leukemia cell line (FDC-P1) that expressed the hybrid receptor caused proliferation of these cells. The mechanism for signal transduction of the hybrid receptor required dimerization because monoclonal antibodies to the hGH receptor were agonists whereas their monovalent fragments were not. Receptor dimerization occurs sequentially--a receptor binds to site 1 on hGH, and then a second receptor molecule binds to site 2 on hGH. On the basis of this sequential mechanism, which may occur in many other cytokine receptors, inactive hGH analogs were designed that were potent antagonists to hGH-induced cell proliferation. Such antagonists could be useful for treating clinical conditions of hGH excess, such as acromegaly.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fuh, G -- Cunningham, B C -- Fukunaga, R -- Nagata, S -- Goeddel, D V -- Wells, J A -- New York, N.Y. -- Science. 1992 Jun 19;256(5064):1677-80.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Protein Engineering, Genentech, Inc., South San Francisco, CA 94080.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1535167" target="_blank"〉PubMed〈/a〉
    Keywords: Antibodies, Monoclonal ; Cell Division/drug effects ; Cell Line ; DNA Replication/drug effects ; Dose-Response Relationship, Drug ; Growth Hormone/analysis/physiology ; Humans ; Models, Molecular ; Receptors, Granulocyte Colony-Stimulating Factor/physiology ; Receptors, Somatotropin/*physiology ; Signal Transduction/physiology ; Transfection
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    The Fas death factor (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-03-10
    Description: Fas ligand (FasL), a cell surface molecule belonging to the tumor necrosis factor family, binds to its receptor Fas, thus inducing apoptosis of Fas-bearing cells. Various cells express Fas, whereas FasL is expressed predominantly in activated T cells. In the immune system, Fas and FasL are involved in down-regulation of immune reactions as well as in T cell-mediated cytotoxicity. Malfunction of the Fas system causes lymphoproliferative disorders and accelerates autoimmune diseases, whereas its exacerbation may cause tissue destruction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nagata, S -- Golstein, P -- New York, N.Y. -- Science. 1995 Mar 10;267(5203):1449-56.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Osaka Bioscience Institute, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7533326" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Antigens, CD95 ; Antigens, Surface/chemistry/genetics/*physiology ; *Apoptosis ; Autoimmune Diseases/genetics/immunology ; Base Sequence ; Cytotoxicity, Immunologic ; Down-Regulation ; Fas Ligand Protein ; Humans ; Lymphocyte Activation ; Lymphocytes/cytology/*immunology ; Lymphoproliferative Disorders/genetics/immunology ; Membrane Glycoproteins/chemistry/genetics/*physiology ; Molecular Sequence Data ; T-Lymphocytes, Cytotoxic/immunology
    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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  • 3
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    Xk-related protein 8 and CED-8 promote phosphatidylserine exposure in apoptotic cells (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-07-13
    Description: A classic feature of apoptotic cells is the cell-surface exposure of phosphatidylserine (PtdSer) as an "eat me" signal for engulfment. We show that the Xk-family protein Xkr8 mediates PtdSer exposure in response to apoptotic stimuli. Mouse Xkr8(-/-) cells or human cancer cells in which Xkr8 expression was repressed by hypermethylation failed to expose PtdSer during apoptosis and were inefficiently engulfed by phagocytes. Xkr8 was activated directly by caspases and required a caspase-3 cleavage site for its function. CED-8, the only Caenorhabditis elegans Xk-family homolog, also promoted apoptotic PtdSer exposure and cell-corpse engulfment. Thus, Xk-family proteins have evolutionarily conserved roles in promoting the phagocytosis of dying cells by altering the phospholipid distribution in the plasma membrane.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Suzuki, Jun -- Denning, Daniel P -- Imanishi, Eiichi -- Horvitz, H Robert -- Nagata, Shigekazu -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2013 Jul 26;341(6144):403-6. doi: 10.1126/science.1236758. Epub 2013 Jul 11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medical Chemistry, Graduate School of Medicine, Kyoto University, Yoshida-Konoe, Sakyo-ku, Kyoto, Kyoto 606-8501, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23845944" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; *Apoptosis ; Apoptosis Regulatory Proteins/chemistry/genetics/*metabolism ; Caenorhabditis elegans Proteins/*metabolism ; Calcium/metabolism ; Caspases/metabolism ; Cell Line ; Cell Line, Tumor ; Cell Membrane/*metabolism ; CpG Islands ; Humans ; Macrophages/physiology ; Membrane Proteins/chemistry/genetics/*metabolism ; Mice ; Mice, Knockout ; Molecular Sequence Data ; *Phagocytosis ; Phosphatidylserines/*metabolism ; Recombinant Fusion Proteins/metabolism
    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
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    Caspase-mediated cleavage of phospholipid flippase for apoptotic phosphatidylserine exposure (2014)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2014-06-07
    Description: Phospholipids are asymmetrically distributed in the plasma membrane. This asymmetrical distribution is disrupted during apoptosis, exposing phosphatidylserine (PtdSer) on the cell surface. Using a haploid genetic screen in human cells, we found that ATP11C (adenosine triphosphatase type 11C) and CDC50A (cell division cycle protein 50A) are required for aminophospholipid translocation from the outer to the inner plasma membrane leaflet; that is, they display flippase activity. ATP11C contained caspase recognition sites, and mutations at these sites generated caspase-resistant ATP11C without affecting its flippase activity. Cells expressing caspase-resistant ATP11C did not expose PtdSer during apoptosis and were not engulfed by macrophages, which suggests that inactivation of the flippase activity is required for apoptotic PtdSer exposure. CDC50A-deficient cells displayed PtdSer on their surface and were engulfed by macrophages, indicating that PtdSer is sufficient as an "eat me" signal.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Segawa, Katsumori -- Kurata, Sachiko -- Yanagihashi, Yuichi -- Brummelkamp, Thijn R -- Matsuda, Fumihiko -- Nagata, Shigekazu -- New York, N.Y. -- Science. 2014 Jun 6;344(6188):1164-8. doi: 10.1126/science.1252809.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medical Chemistry, Graduate School of Medicine, Kyoto University, Yoshida-Konoe, Kyoto 606-8501, Japan. ; Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX Amsterdam, Netherlands. ; Center for Genomic Medicine, Graduate School of Medicine, Kyoto University, Yoshida-Konoe, Kyoto 606-8501, Japan. ; Department of Medical Chemistry, Graduate School of Medicine, Kyoto University, Yoshida-Konoe, Kyoto 606-8501, Japan. Core Research for Evolutional Science and Technology, Japan Science and Technology Corporation, Kyoto 606-8501, Japan. snagata@mfour.med.kyoto-u.ac.jp.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24904167" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphatases/genetics/*metabolism ; *Apoptosis ; Caspases/*metabolism ; Cell Line ; Cell Membrane/*enzymology ; Genetic Testing ; Humans ; Membrane Proteins/*metabolism ; Membrane Transport Proteins ; Phosphatidylserines/*metabolism ; Phospholipid Transfer Proteins/genetics/*metabolism ; Protein Transport
    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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  • 5
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    Effect of interferon-alpha 1 from E. coli on some cell functions (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-09-19
    Description: Interferon-alpha 1 from Escherichia coli transformed with a hybrid plasmid containing a human leukocyte complementary DNA insert, induces resistance to virus in appropriate target cells. It also shares the following properties with natural leukocyte interferon (IFN). (i) It enhances natural killing activity of human lymphocytes, (ii) it enhances antibody-dependent cell-mediated cytotoxicity, (iii) it suppresses antigen- and mitogen-induced leukocyte migration inhibition, (iv) it inhibits growth of IFN-sensitive Burkitt lymphoma cells. Since these activities are exhibited by a cloned protein species, they are due to IFN itself and not to other human proteins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Masucci, M G -- Szigeti, R -- Klein, E -- Klein, G -- Gruest, J -- Montagnier, L -- Taira, H -- Hall, A -- Nagata, S -- Weissmann, C -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1431-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6158096" target="_blank"〉PubMed〈/a〉
    Keywords: Antibody-Dependent Cell Cytotoxicity/drug effects ; Cell Division/drug effects ; Cell Migration Inhibition ; Cloning, Molecular ; *DNA, Recombinant ; Escherichia coli ; Humans ; Hypersensitivity, Delayed/immunology ; Immunity, Cellular/drug effects ; Interferons/genetics/*pharmacology ; Structure-Activity Relationship
    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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  • 6
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    At least three human type alpha interferons: structure of alpha 2 (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-09-19
    Description: The sequence of a human leukocyte-derived complementary DNA (cDNA), Hif-2h, which directs the formation in Escherichia coli of a polypeptide, IFN-alpha 1, with interferon (IFN) activity has been described. A second IFN cDNA, Hif-SN206, which also elicits synthesis of a biologically active IFN, IFN-alpha 2, is described in this article. Whereas IFN-alpha 2 is twice as active on human as on bovine cells, IFN-alpha 1 is 10 to 20 times more active on bovine than on human cells. As deduced from the cDNA's, the messenger RNA's for the two IFN's differ in length and in 20 percent of the nucleotides; the mature IFN polypeptides differ in 17 percent of the amino acids. Both IFN-alpha 1 and IFN-alpha 2 differ from the lymphoblastoid IFN described by others. Therefore, at least three different IFN-alpha genes are expressed in man; studies on genomic DNA reveal the presence of at least eight IFN-related genes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Streuli, M -- Nagata, S -- Weissmann, C -- New York, N.Y. -- Science. 1980 Sep 19;209(4463):1343-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6158094" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; DNA, Recombinant ; Escherichia coli/genetics ; Genes ; Humans ; *Interferons/genetics ; Leukocytes ; Lymphocytes ; Mice ; RNA, Messenger/genetics ; Structure-Activity Relationship
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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