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Related Articles from SNS
SIRT7 regulates dosage compensation and safeguards the female X chromosome
Abstract Sirtuins are deacetylases implicated in stress responses and longevity in mammals1,2. Although their differential impact on disease for the two sexes has been noted3,4,5,6,7, the underlying reasons are unclear. Here, using Sirt7 as a model in mice, we examine the mechanisms leading to sex differences and find that Sirt7−/− female mice have decreased fitness throughout their lifespan.
Genetic control of mitotic-to-meiotic transition regulates germline cell survival
The coordination between DNA damage repair and cell cycle progression is essential to ensure cell survival and organ homeostasis. This is particularly critical during gametogenesis, where germline cells first proliferate and then transition from mitosis to meiosis. Meiotic cells frequently undergo recombination, which itself implies the generation of severe DNA damage in the form of double-strand DNA breaks (DSBs) that ought to be repaired to preserve genome integrity.