SIRT1 and caloric restriction: an insight into possible trade-offs between robustness and frailty
- 1 July 2009
- journal article
- review article
- Published by Ovid Technologies (Wolters Kluwer Health) in Current Opinion in Clinical Nutrition and Metabolic Care
- Vol. 12 (4), 350-356
- https://doi.org/10.1097/mco.0b013e32832c932d
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.Keywords
This publication has 69 references indexed in Scilit:
- SirT1 Gain of Function Increases Energy Efficiency and Prevents Diabetes in MiceCell Metabolism, 2008
- Resveratrol Delays Age-Related Deterioration and Mimics Transcriptional Aspects of Dietary Restriction without Extending Life SpanCell Metabolism, 2008
- Xenohormesis: Sensing the Chemical Cues of Other SpeciesCell, 2008
- Small molecule activators of SIRT1 as therapeutics for the treatment of type 2 diabetesNature, 2007
- Towards a theory of biological robustnessMolecular Systems Biology, 2007
- Resveratrol improves health and survival of mice on a high-calorie dietNature, 2006
- Therapeutic potential of resveratrol: the in vivo evidenceNature Reviews Drug Discovery, 2006
- Overview of caloric restriction and ageingMechanisms of Ageing and Development, 2005
- Sirtuin activators mimic caloric restriction and delay ageing in metazoansNature, 2004
- Small molecule activators of sirtuins extend Saccharomyces cerevisiae lifespanNature, 2003