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  • 1
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    Bax deficiency extends the survival of Ku70 knockout mice that develop lung and heart diseases (2015)
    Springer Nature
    Details
    Publication Date: 2015-03-27
    Description: Bax deficiency extends the survival of Ku70 knockout mice that develop lung and heart diseases Cell Death and Disease 6, e1706 (March 2015). doi:10.1038/cddis.2015.11 Authors: J Ngo, M Matsuyama, C Kim, I Poventud-Fuentes, A Bates, S L Siedlak, H-g Lee, Y Q Doughman, M Watanabe, A Liner, B Hoit, N Voelkel, S Gerson, P Hasty & S Matsuyama
    Electronic ISSN: 2041-4889
    Topics: Biology , Medicine
    Published by Springer Nature
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  • 2
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    Aging and genome maintenance: lessons from the mouse? (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-03-01
    Description: Recent progress in the science of aging is driven largely by the use of model systems, ranging from yeast and nematodes to mice. These models have revealed conservation in genetic pathways that balance energy production and its damaging by-products with pathways that preserve somatic maintenance. Maintaining genome integrity has emerged as a major factor in longevity and cell viability. Here we discuss the use of mouse models with defects in genome maintenance for understanding the molecular basis of aging in humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hasty, Paul -- Campisi, Judith -- Hoeijmakers, Jan -- van Steeg, Harry -- Vijg, Jan -- AG17242/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 2003 Feb 28;299(5611):1355-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Medicine, University of Texas Health Science Center, San Antonio, TX 78245, USA. hastye@uthscsa.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12610296" target="_blank"〉PubMed〈/a〉
    Keywords: *Aging/genetics ; Aging, Premature/*genetics ; Animals ; Apoptosis ; Cell Aging ; *DNA Damage ; DNA Helicases/genetics/metabolism ; *DNA Repair/genetics ; Exodeoxyribonucleases ; *Genome ; Genome, Human ; Humans ; Longevity/genetics ; Mice ; Mutation ; Reactive Oxygen Species/metabolism ; RecQ Helicases ; Syndrome ; Telomere/physiology ; Transcription, Genetic
    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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  • 3
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    Aging. Genomic priorities in aging (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-04-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hasty, Paul -- Vijg, Jan -- New York, N.Y. -- Science. 2002 May 17;296(5571):1250-1. Epub 2002 Apr 11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Medicine, University of Texas Health Science Center, San Antonio, TX 78245, USA. hastye@uthscsa.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11951000" target="_blank"〉PubMed〈/a〉
    Keywords: *Aging ; Aging, Premature/*etiology/genetics ; Animals ; Apoptosis ; Cell Aging ; Crosses, Genetic ; *DNA Damage ; DNA Helicases/genetics/metabolism ; *DNA Repair ; DNA-Binding Proteins/genetics/metabolism ; Female ; Free Radicals/metabolism ; Hair Diseases/genetics ; Humans ; Male ; Mice ; Mice, Knockout ; Mutation ; Proteins/genetics/metabolism ; RNA-Binding Proteins/genetics/metabolism ; Reactive Oxygen Species/metabolism ; Transcription Factor TFIIH ; Transcription Factors/genetics/metabolism ; *Transcription Factors, TFII ; *Transcription, Genetic ; Tumor Suppressor Protein p53/genetics/metabolism ; Xeroderma Pigmentosum Group A Protein ; Xeroderma Pigmentosum Group D Protein
    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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  • 4
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    Two replication fork maintenance pathways fuse inverted repeats to rearrange chromosomes (2013)
    Nature Publishing Group (NPG)
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    Publication Date: 2013-09-10
    Description: Replication fork maintenance pathways preserve chromosomes, but their faulty application at nonallelic repeats could generate rearrangements causing cancer, genomic disorders and speciation. Potential causal mechanisms are homologous recombination and error-free postreplication repair (EF-PRR). Homologous recombination repairs damage-induced DNA double-strand breaks (DSBs) and single-ended DSBs within replication. To facilitate homologous recombination, the recombinase RAD51 and mediator BRCA2 form a filament on the 3' DNA strand at a break to enable annealing to the complementary sister chromatid while the RecQ helicase, BLM (Bloom syndrome mutated) suppresses crossing over to prevent recombination. Homologous recombination also stabilizes and restarts replication forks without a DSB. EF-PRR bypasses DNA incongruities that impede replication by ubiquitinating PCNA (proliferating cell nuclear antigen) using the RAD6-RAD18 and UBC13-MMS2-RAD5 ubiquitin ligase complexes. Some components are common to both homologous recombination and EF-PRR such as RAD51 and RAD18. Here we delineate two pathways that spontaneously fuse inverted repeats to generate unstable chromosomal rearrangements in wild-type mouse embryonic stem (ES) cells. Gamma-radiation induced a BLM-regulated pathway that selectively fused identical, but not mismatched, repeats. By contrast, ultraviolet light induced a RAD18-dependent pathway that efficiently fused mismatched repeats. Furthermore, TREX2 (a 3'--〉5' exonuclease) suppressed identical repeat fusion but enhanced mismatched repeat fusion, clearly separating these pathways. TREX2 associated with UBC13 and enhanced PCNA ubiquitination in response to ultraviolet light, consistent with it being a novel member of EF-PRR. RAD18 and TREX2 also suppressed replication fork stalling in response to nucleotide depletion. Interestingly, replication fork stalling induced fusion for identical and mismatched repeats, implicating faulty replication as a causal mechanism for both pathways.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3805358/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3805358/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hu, Lingchuan -- Kim, Tae Moon -- Son, Mi Young -- Kim, Sung-A -- Holland, Cory L -- Tateishi, Satoshi -- Kim, Dong Hyun -- Yew, P Renee -- Montagna, Cristina -- Dumitrache, Lavinia C -- Hasty, Paul -- 1 R01 CA123203-01A1/CA/NCI NIH HHS/ -- 2P01AG017242-12/AG/NIA NIH HHS/ -- P30 CA054174/CA/NCI NIH HHS/ -- P30CA013330/CA/NCI NIH HHS/ -- R01 CA123203/CA/NCI NIH HHS/ -- England -- Nature. 2013 Sep 26;501(7468):569-72. doi: 10.1038/nature12500. Epub 2013 Sep 8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Medicine/Institute of Biotechnology, The Barshop Institute for Longevity and Aging Studies, The University of Texas Health Science Center at San Antonio, San Antonio, Texas 78245-3207, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24013173" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Chromosomal Instability/*genetics ; Chromosome Breakage ; Chromosomes, Mammalian/*genetics ; DNA Breaks, Double-Stranded ; DNA Repair/*genetics ; DNA Replication/*genetics ; DNA-Binding Proteins/metabolism ; Embryonic Stem Cells/metabolism ; Exodeoxyribonucleases/metabolism ; Homologous Recombination/*genetics ; Hydroxyurea/pharmacology ; Inverted Repeat Sequences/*genetics ; Mice ; Nucleotides/deficiency/metabolism ; Proliferating Cell Nuclear Antigen/metabolism ; Rad51 Recombinase/metabolism ; RecQ Helicases/metabolism ; Ubiquitin-Conjugating Enzymes/metabolism ; Ubiquitination/radiation effects ; Ultraviolet Rays
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 5
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    Ku is a 5'-dRP/AP lyase that excises nucleotide damage near broken ends (2010)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2010-04-13
    Description: Mammalian cells require non-homologous end joining (NHEJ) for the efficient repair of chromosomal DNA double-strand breaks. A key feature of biological sources of strand breaks is associated nucleotide damage, including base loss (abasic or apurinic/apyrimidinic (AP) sites). At single-strand breaks, 5'-terminal abasic sites are excised by the 5'-deoxyribose-5-phosphate (5'-dRP) lyase activity of DNA polymerase beta (pol beta): here we show, in vitro and in cells, that accurate and efficient repair by NHEJ of double-strand breaks with such damage similarly requires 5'-dRP/AP lyase activity. Classically defined NHEJ is moreover uniquely effective at coupling this end-cleaning step to joining in cells, helping to distinguish this pathway from otherwise robust alternative NHEJ pathways. The NHEJ factor Ku can be identified as an effective 5'-dRP/AP lyase. In a similar manner to other lyases, Ku nicks DNA 3' of an abasic site by a mechanism involving a Schiff-base covalent intermediate with the abasic site. We show by using cell extracts that Ku is essential for the efficient removal of AP sites near double-strand breaks and, consistent with this result, that joining of such breaks is specifically decreased in cells complemented with a lyase-attenuated Ku mutant. Ku had previously been presumed only to recognize ends and recruit other factors that process ends; our data support an unexpected direct role for Ku in end-processing steps as well.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2859099/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2859099/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roberts, Steven A -- Strande, Natasha -- Burkhalter, Martin D -- Strom, Christina -- Havener, Jody M -- Hasty, Paul -- Ramsden, Dale A -- CA 84442/CA/NCI NIH HHS/ -- P01 AG17242/AG/NIA NIH HHS/ -- R01 CA084442/CA/NCI NIH HHS/ -- R01 CA084442-10/CA/NCI NIH HHS/ -- R01 CA76317-05A1/CA/NCI NIH HHS/ -- England -- Nature. 2010 Apr 22;464(7292):1214-7. doi: 10.1038/nature08926. Epub 2010 Apr 11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Biophysics, Lineberger Comprehensive Cancer Center, and Curriculum in Genetics and Molecular Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20383123" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, Nuclear/genetics/*metabolism ; *Biocatalysis ; Cell Extracts ; Cell Line ; *DNA Breaks, Double-Stranded ; *DNA Damage ; *DNA Repair ; DNA-(Apurinic or Apyrimidinic Site) Lyase/genetics/*metabolism ; DNA-Binding Proteins/genetics/*metabolism ; Fibroblasts ; HeLa Cells ; Humans ; Mice ; Ribosemonophosphates/*metabolism ; Schiff Bases/chemistry
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 6
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    Correction of chromosomal mutation and random integration in embryonic stem cells with helper-dependent adenoviral vectors (2005)
    National Academy of Sciences
    Details
    Publication Date: 2005-09-07
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 7
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    Defective embryonic neurogenesis in Ku-deficient but not DNA-dependent protein kinase catalytic subunit-deficient mice (2000)
    National Academy of Sciences
    Details
    Publication Date: 2000-03-14
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 8
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    Deletion of Ku86 causes early onset of senescence in mice (1999)
    National Academy of Sciences
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    Publication Date: 1999-09-14
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 9
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    Fidelity of targeted recombination in human fibroblasts and murine embryonic stem cells. (1991)
    National Academy of Sciences
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    Publication Date: 1991-09-15
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 10
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    RECQL5 and BLM exhibit divergent functions in cells defective for the Fanconi anemia pathway (2015)
    Oxford University Press
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    Publication Date: 2015-01-24
    Description: Fanconi anemia (FA) patients exhibit bone marrow failure, developmental defects and cancer. The FA pathway maintains chromosomal stability in concert with replication fork maintenance and DNA double strand break (DSB) repair pathways including RAD51-mediated homologous recombination (HR). RAD51 is a recombinase that maintains replication forks and repairs DSBs, but also rearranges chromosomes. Two RecQ helicases, RECQL5 and Bloom syndrome mutated (BLM) suppress HR through nonredundant mechanisms. Here we test the impact deletion of RECQL5 and BLM has on mouse embryonic stem (ES) cells deleted for FANCB, a member of the FA core complex. We show that RECQL5, but not BLM, conferred resistance to mitomycin C (MMC, an interstrand crosslinker) and camptothecin (CPT, a type 1 topoisomerase inhibitor) in FANCB-defective cells. RECQL5 suppressed, while BLM caused, breaks and radials in FANCB-deleted cells exposed to CPT or MMC, respectively. RECQL5 protected the nascent replication strand from MRE11-mediated degradation and restarted stressed replication forks in a manner additive to FANCB. By contrast BLM restarted, but did not protect, replication forks in a manner epistatic to FANCB. RECQL5 also lowered RAD51 levels in FANCB-deleted cells at stressed replication sites implicating a rearrangement avoidance mechanism. Thus, RECQL5 and BLM impact FANCB-defective cells differently in response to replication stress with relevance to chemotherapeutic regimes.
    Print ISSN: 0305-1048
    Electronic ISSN: 1362-4962
    Topics: Biology
    Published by Oxford University Press
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