Restoration of energy homeostasis by SIRT6 extends healthy lifespan

A. Roichman, S. Elhanati, M. A. Aon, I. Abramovich, A. Di Francesco, Y. Shahar, M. Y. Avivi, M. Shurgi, A. Rubinstein, Y. Wiesner, A. Shuchami, Z. Petrover, I. Lebenthal-Loinger, O. Yaron, A. Lyashkov, C. Ubaida-Mohien, Y. Kanfi, B. Lerrer, P. J. Fernández-Marcos, M. SerranoE. Gottlieb, R. de Cabo, H. Y. Cohen

Research output: Contribution to journalArticlepeer-review

95 Scopus citations

Abstract

Aging leads to a gradual decline in physical activity and disrupted energy homeostasis. The NAD+-dependent SIRT6 deacylase regulates aging and metabolism through mechanisms that largely remain unknown. Here, we show that SIRT6 overexpression leads to a reduction in frailty and lifespan extension in both male and female B6 mice. A combination of physiological assays, in vivo multi-omics analyses and 13C lactate tracing identified an age-dependent decline in glucose homeostasis and hepatic glucose output in wild type mice. In contrast, aged SIRT6-transgenic mice preserve hepatic glucose output and glucose homeostasis through an improvement in the utilization of two major gluconeogenic precursors, lactate and glycerol. To mediate these changes, mechanistically, SIRT6 increases hepatic gluconeogenic gene expression, de novo NAD+ synthesis, and systemically enhances glycerol release from adipose tissue. These findings show that SIRT6 optimizes energy homeostasis in old age to delay frailty and preserve healthy aging.

Original languageEnglish
Article number3208
JournalNature Communications
Volume12
Issue number1
DOIs
StatePublished - 1 Dec 2021
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy
  • General Chemistry
  • General Biochemistry, Genetics and Molecular Biology

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