SIRT1 and caloric restriction: An insight into possible trade-offs between robustness and frailty

Research output: Contribution to journalReview articlepeer-review

38 Scopus citations

Abstract

PURPOSE OF REVIEW: This review aims to summarize the importance of the mammalian nicotinamide adenine dinucleotide (NAD)-dependent deacetylase SIRT1 as a critical mediator that coordinates metabolic responses to caloric restriction and the recent progress in the development of SIRT1-targeted caloric restriction mimetics. It also discusses possible trade-offs between robustness and frailty in caloric restriction and the applicability of caloric restriction or SIRT1-targeted caloric restriction mimetics to humans. RECENT FINDINGS: Loss-of-function and gain-of-function mouse studies have provided genetic evidence that SIRT1 is a key mediator that orchestrates the physiological response to caloric restriction. SIRT1-activating compounds function as potential caloric restriction mimetics, at least in part, through the activation of SIRT1 in vivo. SUMMARY: Increasing SIRT1 dosage/activity is effective to provide significant protection from high-fat diet-induced metabolic complications, suggesting that SIRT1 activation likely promotes robustness in the regulation of metabolism. However, caloric restriction itself and caloric restriction mimicry through systemic SIRT1 activation might also generate frailty in response to unexpected environmental stimuli, such as bacterial and viral infections. It will be of great importance to understand the principles of systemic robustness and its spatial and temporal dynamics for the regulation of aging and longevity in mammals in order to achieve an optimal balance between robustness and frailty in our complex physiological system.

Original languageEnglish
Pages (from-to)350-356
Number of pages7
JournalCurrent opinion in clinical nutrition and metabolic care
Volume12
Issue number4
DOIs
StatePublished - Jul 2009

Keywords

  • Caloric restriction
  • Frailty
  • Robustness
  • SIRT1
  • STACs
  • Sirtuins

Fingerprint

Dive into the research topics of 'SIRT1 and caloric restriction: An insight into possible trade-offs between robustness and frailty'. Together they form a unique fingerprint.

Cite this