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  • *Apoptosis  (5)
  • American Association for the Advancement of Science (AAAS)  (5)
  • 1
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    Requirement for the CD95 receptor-ligand pathway in c-Myc-induced apoptosis (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-11-21
    Description: Induction of apoptosis by oncogenes like c-myc may be important in restraining the emergence of neoplasia. However, the mechanism by which c-myc induces apoptosis is unknown. CD95 (also termed Fas or APO-1) is a cell surface transmembrane receptor of the tumor necrosis factor receptor family that activates an intrinsic apoptotic suicide program in cells upon binding either its ligand CD95L or antibody. c-myc-induced apoptosis was shown to require interaction on the cell surface between CD95 and its ligand. c-Myc acts downstream of the CD95 receptor by sensitizing cells to the CD95 death signal. Moreover, IGF-I signaling and Bcl-2 suppress c-myc-induced apoptosis by also acting downstream of CD95. These findings link two apoptotic pathways previously thought to be independent and establish the dependency of Myc on CD95 signaling for its killing activity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hueber, A O -- Zornig, M -- Lyon, D -- Suda, T -- Nagata, S -- Evan, G I -- New York, N.Y. -- Science. 1997 Nov 14;278(5341):1305-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Imperial Cancer Research Fund (ICRF) Laboratories, 44 Lincoln's Inn Fields, London WC2A 3PX, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9360929" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; *Adaptor Proteins, Signal Transducing ; Animals ; Antigens, CD95/*metabolism ; *Apoptosis ; Autocrine Communication ; Carrier Proteins/metabolism ; Cell Line ; Cell Membrane/metabolism ; Cells, Cultured ; Fas Ligand Protein ; Fas-Associated Death Domain Protein ; Gene Expression Regulation ; Genes, myc ; Insulin-Like Growth Factor I/pharmacology/physiology ; Membrane Glycoproteins/*metabolism ; Mice ; Proto-Oncogene Proteins c-bcl-2/pharmacology/physiology ; Proto-Oncogene Proteins c-myc/*metabolism ; Rats
    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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    Autoimmune disease and impaired uptake of apoptotic cells in MFG-E8-deficient mice (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-05-25
    Description: Apoptotic cells expose phosphatidylserine and are swiftly engulfed by macrophages. Milk fat globule epidermal growth factor (EGF) factor 8 (MFG-E8) is a protein that binds to apoptotic cells by recognizing phosphatidylserine and that enhances the engulfment of apoptotic cells by macrophages. We report that tingible body macrophages in the germinal centers of the spleen and lymph nodes strongly express MFG-E8. Many apoptotic lymphocytes were found on the MFG-E8-/- tingible body macrophages, but they were not efficiently engulfed. The MFG-E8-/- mice developed splenomegaly, with the formation of numerous germinal centers, and suffered from glomerulonephritis as a result of autoantibody production. These data demonstrate that MFG-E8 has a critical role in removing apoptotic B cells in the germinal centers and that its failure can lead to autoimmune diseases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hanayama, Rikinari -- Tanaka, Masato -- Miyasaka, Kay -- Aozasa, Katsuyuki -- Koike, Masato -- Uchiyama, Yasuo -- Nagata, Shigekazu -- New York, N.Y. -- Science. 2004 May 21;304(5674):1147-50.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, Osaka University Medical School, 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15155946" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Antinuclear/blood ; Antigens, CD/analysis ; Antigens, Differentiation, Myelomonocytic/analysis ; *Antigens, Surface ; *Apoptosis ; Autoantibodies/biosynthesis/blood ; Autoimmune Diseases/*immunology ; B-Lymphocytes/immunology ; Blotting, Northern ; Female ; Gene Targeting ; Germinal Center/cytology/immunology/metabolism ; Glomerulonephritis/*immunology ; In Situ Nick-End Labeling ; Macrophage Activation ; Macrophages/immunology/*metabolism/ultrastructure ; Macrophages, Peritoneal/immunology/metabolism ; Membrane Glycoproteins/genetics/*metabolism ; Mice ; *Milk Proteins ; *Phagocytosis ; Phosphatidylserines/metabolism ; Protein Binding ; Spleen/cytology/metabolism/pathology ; Splenomegaly/pathology ; T-Lymphocytes/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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    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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  • 4
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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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  • 5
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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
    Published by American Association for the Advancement of Science (AAAS)
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