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  • 1
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-03-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉de Lange, T -- DePinho, R A -- CA76027/CA/NCI NIH HHS/ -- HD 348880/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1999 Feb 12;283(5404):947-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory for Cell Biology and Genetics, Rockefeller University, New York, NY 10021, USA. delange@rockvax.rockefeller.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10075559" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Aging ; *Cell Division ; *Cell Transformation, Neoplastic ; Cyclin-Dependent Kinase Inhibitor p16/metabolism ; Humans ; Neoplasms/enzymology/metabolism/pathology ; Proto-Oncogene Proteins c-myc/metabolism ; Retinoblastoma Protein/metabolism ; Signal Transduction ; Telomerase/genetics/*metabolism ; Telomere/*metabolism ; ras 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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  • 2
    Publication Date: 2002-03-30
    Description: Primary human cells in culture invariably stop dividing and enter a state of growth arrest called replicative senescence. This transition is induced by programmed telomere shortening, but the underlying mechanisms are unclear. Here, we report that overexpression of TRF2, a telomeric DNA binding protein, increased the rate of telomere shortening in primary cells without accelerating senescence. TRF2 reduced the senescence setpoint, defined as telomere length at senescence, from 7 to 4 kilobases. TRF2 protected critically short telomeres from fusion and repressed chromosome-end fusions in presenescent cultures, which explains the ability of TRF2 to delay senescence. Thus, replicative senescence is induced by a change in the protected status of shortened telomeres rather than by a complete loss of telomeric DNA.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Karlseder, Jan -- Smogorzewska, Agata -- de Lange, Titia -- AG16643/AG/NIA NIH HHS/ -- CA76027/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2002 Mar 29;295(5564):2446-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory for Cell Biology and Genetics, The Rockefeller University, 1230 York Avenue, New York, NY 10021, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11923537" target="_blank"〉PubMed〈/a〉
    Keywords: Antigens, Polyomavirus Transforming/genetics/metabolism ; *Cell Aging ; *Cell Division ; Cell Line ; Cells, Cultured ; DNA/*metabolism ; DNA-Binding Proteins/genetics/*metabolism ; Humans ; Oncogene Proteins, Viral/genetics/metabolism ; Papillomavirus E7 Proteins ; *Repressor Proteins ; Retinoblastoma Protein/metabolism ; Retroviridae/genetics ; Telomere/metabolism/*physiology ; Telomeric Repeat Binding Protein 2 ; Transformation, Genetic ; Tumor Suppressor Protein p53/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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  • 3
    Publication Date: 1999-02-26
    Description: Although broken chromosomes can induce apoptosis, natural chromosome ends (telomeres) do not trigger this response. It is shown that this suppression of apoptosis involves the telomeric-repeat binding factor 2 (TRF2). Inhibition of TRF2 resulted in apoptosis in a subset of mammalian cell types. The response was mediated by p53 and the ATM (ataxia telangiectasia mutated) kinase, consistent with activation of a DNA damage checkpoint. Apoptosis was not due to rupture of dicentric chromosomes formed by end-to-end fusion, indicating that telomeres lacking TRF2 directly signal apoptosis, possibly because they resemble damaged DNA. Thus, in some cells, telomere shortening may signal cell death rather than senescence.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Karlseder, J -- Broccoli, D -- Dai, Y -- Hardy, S -- de Lange, T -- GM49046/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1999 Feb 26;283(5406):1321-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory for Cell Biology and Genetics, The Rockefeller University, New York, NY 10021, USA. Cell Genesys, Foster City, CA 94405, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10037601" target="_blank"〉PubMed〈/a〉
    Keywords: Adenoviridae/genetics/physiology ; Animals ; *Apoptosis ; Ataxia Telangiectasia/pathology ; Ataxia Telangiectasia Mutated Proteins ; B-Lymphocytes/cytology ; Cell Cycle Proteins ; Cell Line ; Cells, Cultured ; Cloning, Molecular ; DNA Damage ; DNA-Binding Proteins/chemistry/genetics/*physiology ; Genetic Vectors ; Humans ; In Situ Nick-End Labeling ; Mice ; Mitosis ; Phosphorylation ; *Protein-Serine-Threonine Kinases ; Proteins/metabolism ; T-Lymphocytes/cytology ; Telomere/*physiology ; Telomeric Repeat Binding Protein 2 ; Tumor Cells, Cultured ; Tumor Suppressor Protein p53/*metabolism ; Tumor Suppressor Proteins
    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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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1998-02-07
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉de Lange, T -- New York, N.Y. -- Science. 1998 Jan 16;279(5349):334-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory for Cell Biology and Genetics, The Rockefeller University, New York, NY 10021, USA. delange@rockvax.rockefeller.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9454329" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antineoplastic Agents/pharmacology ; *Cell Aging ; *Cell Division ; Cell Line ; Cell Transformation, Neoplastic ; DNA-Binding Proteins ; Enzyme Activation ; Genes, Tumor Suppressor ; Humans ; Mice ; Neoplasms/drug therapy/enzymology/pathology ; Proteins/genetics/*metabolism ; *Rna ; RNA-Directed DNA Polymerase/genetics/metabolism ; Telomerase/antagonists & inhibitors/genetics/*metabolism ; Telomere/metabolism/*physiology/ultrastructure ; Transfection
    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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