Longevity mutation in SCH9 prevents recombination errors and premature genomic instability in a Werner/Bloom model system.
Longevity mutation in SCH9 prevents recombination errors and premature genomic instability in a Werner/Bloom model system.
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DOI:
10.1083/jcb.200707154
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发表时间:
2008-01-14
期刊:
影响因子:
--
通讯作者:
Longo VD
中科院分区:
文献类型:
--
作者:
Madia F;Gattazzo C;Wei M;Fabrizio P;Burhans WC;Weinberger M;Galbani A;Smith JR;Nguyen C;Huey S;Comai L;Longo VD
Werner and Bloom syndromes are human diseases characterized by premature age-related defects including elevated cancer incidence. Using a novel Saccharomyces cerevisiae model system for aging and cancer, we show that cells lacking the RecQ helicase SGS1 (WRN and BLM homologue) undergo premature age-related changes, including reduced life span under stress and calorie restriction (CR), G1 arrest defects, dedifferentiation, elevated recombination errors, and age-dependent increase in DNA mutations. Lack of SGS1 results in a 110-fold increase in gross chromosomal rearrangement frequency during aging of nondividing cells compared with that generated during the initial population expansion. This underscores the central role of aging in genomic instability. The deletion of SCH9 (homologous to AKT and S6K), but not CR, protects against the age-dependent defects in sgs1Δ by inhibiting error-prone recombination and preventing DNA damage and dedifferentiation. The conserved function of Akt/S6k homologues in lifespan regulation raises the possibility that modulation of the IGF-I–Akt–56K pathway can protect against premature aging syndromes in mammals.
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影响因子:
5.3
作者:
GANGLOFF, S;MCDONALD, JP;ROTHSTEIN, R
通讯作者:
ROTHSTEIN, R
影响因子:
14.9
作者:
Cobb, Jennifer A.;Bjergbaek, Lotte
通讯作者:
Bjergbaek, Lotte
影响因子:
3.9
作者:
Hickson, ID;Davies, SL;Wu, L
通讯作者:
Wu, L
影响因子:
16
作者:
Chen, C;Umezu, K;Kolodner, RD
通讯作者:
Kolodner, RD
DOI:
10.1083/jcb.200604072
发表时间:
2006-07-03
期刊:
The Journal of cell biology
影响因子:
--
作者:
Allen C;Büttner S;Aragon AD;Thomas JA;Meirelles O;Jaetao JE;Benn D;Ruby SW;Veenhuis M;Madeo F;Werner-Washburne M
通讯作者:
Werner-Washburne M