DNA damage leads to progressive replicative decline but extends the life span of long-lived mutant animals

Hannes Lans, JM Lindvall, K Thijssen, AE Karambelas, Daniel Cupac, O Fensgard, Gert Jansen, Jan Hoeijmakers, H Nilsen, Wim Vermeulen

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33 Citations (Scopus)

Abstract

Human-nucleotide-excision repair (NER) deficiency leads to different developmental and segmental progeroid symptoms of which the pathogenesis is only partially understood. To understand the biological impact of accumulating spontaneous DNA damage, we studied the phenotypic consequences of DNA-repair deficiency in Caenorhabditis elegans. We find that DNA damage accumulation does not decrease the adult life span of post-mitotic tissue. Surprisingly, loss of functional ERCC-1/XPF even further extends the life span of long-lived daf-2 mutants, likely through an adaptive activation of stress signaling. Contrariwise, NER deficiency leads to a striking transgenerational decline in replicative capacity and viability of proliferating cells. DNA damage accumulation induces severe, stochastic impairment of development and growth, which is most pronounced in NER mutants that are also impaired in their response to ionizing radiation and inter-strand crosslinks. These results suggest that multiple DNA-repair pathways can protect against replicative decline and indicate that there might be a direct link between the severity of symptoms and the level of DNA-repair deficiency in patients.
Original languageUndefined/Unknown
Pages (from-to)1709-1718
Number of pages10
JournalCell Death & Differentiation
Volume20
Issue number12
DOIs
Publication statusPublished - 2013

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