A cGAS-mediated mechanism in naked mole-rats potentiates DNA repair and delays aging
Efficient DNA repair might make possible the longevity of naked mole-rats. However, whether they have distinctive mechanisms to optimize functions of DNA repair suppressors is unclear. We find that naked mole-rat cyclic guanosine monophosphate-adenosine monophosphate synthase (cGAS) lacks the suppressive function of human or mouse homologs in homologous recombination repair through the alteration of four amino acids during evolution. The changes enable cGAS to retain chromatin longer upon DNA damage by weakening TRIM41-mediated ubiquitination and interaction with the segregase P97. Prolonged chromatin binding of cGAS enhanced the interaction between repair factors FANCI and RAD50 to facilitate RAD50 recruitment to damage sites, thereby potentiating homologous recombination repair. Moreover, the four amino acids mediate the function of cGAS in antagonizing cellular and tissue aging and extending life span. Manipulating cGAS might therefore constitute a mechanism for life-span extension.
Authors
- Kaile Li (ORCID: https://orcid.org/0000-0003-1661-7462)
- Li Tan (ORCID: https://orcid.org/0000-0001-5961-0450)
- Zhiyong Mao (ORCID: https://orcid.org/0000-0002-5298-1918)
- Lingjiang Chen
- Xiaoxiang Sun (ORCID: https://orcid.org/0000-0002-3782-1166)
- Ying Jiang (ORCID: https://orcid.org/0000-0003-2432-8011)
- Jian Yuan (ORCID: https://orcid.org/0000-0002-2801-8849)
- Fang-Lin Sun (ORCID: https://orcid.org/0000-0003-4729-1610)
- Zhen Cui
- Rong Tan (ORCID: https://orcid.org/0000-0002-3629-8668)
- Yisu Zhang
- Yu Chen (ORCID: https://orcid.org/0000-0002-9661-3914)
- Hao Wang (ORCID: https://orcid.org/0000-0002-9131-0199)
- Haipeng Liu (ORCID: https://orcid.org/0000-0002-3338-6291)
- Xiaoyu Xu (ORCID: https://orcid.org/0000-0001-6958-6597)
- Zhiwei Song (ORCID: https://orcid.org/0000-0002-5417-3148)
- Min‐Hua Luo (ORCID: https://orcid.org/0000-0001-9352-0643)
- Z Q Chen
Institutions
- Tongji University (CN)
- Central South University (CN)
- Chinese Academy of Sciences (CN)
- Fudan University (CN)
- Wuhan Institute of Virology (CN)
- Shanghai First Maternity and Infant Hospital (CN)
- Xiangya Hospital Central South University (CN)
Publication Details
- Journal
- Science
- Published
- 2025-10-09
- DOI
- https://doi.org/10.1126/science.adp5056
- Citations
- 27
- Primary Topic
- interferon and immune responses
- Type
- article
- Field-Weighted Citation Impact
- 21.53