Telomeric 8-oxo-guanine drives rapid premature senescence in the absence of telomere shortening.
Telomeric 8-oxo-guanine drives rapid premature senescence in the absence of telomere shortening.
复制标题
端粒8-氧代鸟嘌呤在没有端粒缩短的情况下驱动快速早衰。
DOI:
10.1038/s41594-022-00790-y
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发表时间:
2022-07
影响因子:
16.8
通讯作者:
Opresko, Patricia L.
中科院分区:
文献类型:
--
作者:
Barnes, Ryan P.;de Rosa, Mariarosaria;Thosar, Sanjana A.;Detwiler, Ariana C.;Roginskaya, Vera;Van Houten, Bennett;Bruchez, Marcel P.;Stewart-Ornstein, Jacob;Opresko, Patricia L.
Oxidative stress is a primary cause of cellular senescence and contributes to the etiology of numerous human diseases. Oxidative damage to telomeric DNA has been proposed to cause premature senescence by accelerating telomere shortening. Here, we tested this model directly using a precision chemoptogenetic tool to produce the common lesion 8-oxo-guanine (8oxoG) exclusively at telomeres in human fibroblasts and epithelial cells. A single induction of telomeric 8oxoG is sufficient to trigger multiple hallmarks of p53-dependent senescence. Telomeric 8oxoG activates ATM and ATR signaling, and enriches for markers of telomere dysfunction in replicating, but not quiescent cells. Acute 8oxoG production fails to shorten telomeres, but rather generates fragile sites and mitotic DNA synthesis at telomeres, indicative of impaired replication. Based on our results, we propose that oxidative stress promotes rapid senescence by producing oxidative base lesions that drive replication-dependent telomere fragility and dysfunction in the absence of shortening and shelterin loss. This study uncovers a new mechanism linking oxidative stress to telomere-driven senescence. A common oxidative lesion at telomeres causes rapid premature cellular aging by inducing telomere fragility, rather than telomere shortening.
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影响因子:
5.5
作者:
De Rosa M;Johnson SA;Opresko PL
通讯作者:
Opresko PL
影响因子:
3.7
作者:
HAYFLICK, L;MOORHEAD, PS
通讯作者:
MOORHEAD, PS
影响因子:
4.8
作者:
Henle, ES;Han, ZX;Linn, S
通讯作者:
Linn, S
影响因子:
5.3
作者:
Hegde, Muralidhar L.;Mantha, Anil K.;Hazra, Tapas K.;Bhakat, Kishor K.;Mitra, Sankar;Szczesny, Bartosz
通讯作者:
Szczesny, Bartosz
影响因子:
48
作者:
He J;Wang Y;Missinato MA;Onuoha E;Perkins LA;Watkins SC;St Croix CM;Tsang M;Bruchez MP
通讯作者:
Bruchez MP