SIRT7 Deficiency Protects against Aging-Associated Glucose Intolerance and Extends Lifespan in Male Mice

Tomoya Mizumoto, Tatsuya Yoshizawa, Yoshifumi Sato, Takaaki Ito, Tomonori Tsuyama, Akiko Satoh, Satoshi Araki, Kenichi Tsujita, Masaru Tamura, Yuichi Oike, Kazuya Yamagata

Research output: Contribution to journalArticlepeer-review


Sirtuins (SIRT1–7 in mammals) are evolutionarily conserved nicotinamide adenine dinucleotide-dependent lysine deacetylases/deacylases that regulate fundamental biological processes including aging. In this study, we reveal that male Sirt7 knockout (KO) mice exhibited an extension of mean and maximum lifespan and a delay in the age-associated mortality rate. In addition, aged male Sirt7 KO mice displayed better glucose tolerance with improved insulin sensitivity compared with wild-type (WT) mice. Fibroblast growth factor 21 (FGF21) enhances insulin sensitivity and extends lifespan when it is overexpressed. Serum levels of FGF21 were markedly decreased with aging in WT mice. In contrast, this decrease was suppressed in Sirt7 KO mice, and the serum FGF21 levels of aged male Sirt7 KO mice were higher than those of WT mice. Activating transcription factor 4 (ATF4) stimulates Fgf21 transcription, and the hepatic levels of Atf4 mRNA were increased in aged male Sirt7 KO mice compared with WT mice. Our findings indicate that the loss of SIRT7 extends lifespan and improves glucose metabolism in male mice. High serum FGF21 levels might be involved in the beneficial effect of SIRT7 deficiency.

Original languageEnglish
Article number3609
Issue number22
Publication statusPublished - 2022 Nov


  • FGF21
  • SIRT7
  • knockout mouse
  • lifespan

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)


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