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Related Experiment Video

Updated: Jul 14, 2026

Mechanism of Regulation of Adipocyte Numbers in Adult Organisms Through Differentiation and Apoptosis Homeostasis
08:34

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Published on: June 3, 2016

Molecular links between aging and adipose tissue.

F Picard1, L Guarente

  • 1Laval Hospital Research Center, Faculty of Pharmacy, Université Laval, Québec, QC, Canada. frederic.picard@crhl.ulaval.ca

International Journal of Obesity (2005)
|February 16, 2005
PubMed
Summary

White adipose tissue influences lifespan, with calorie restriction impacting its energy stores. Sirtuin 1 (SIRT1) links lifespan to fat tissue by regulating lipid accumulation and metabolic disorders.

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Area of Science:

  • Metabolic research
  • Aging research
  • Endocrinology

Background:

  • White adipose tissue is recognized as a key regulator of lifespan.
  • Calorie restriction, known to extend lifespan, primarily affects adipose tissue energy stores.
  • Genetic modifications influencing fat mass impact lifespan in model organisms.

Purpose of the Study:

  • To investigate the role of sirtuin 1 (SIRT1), the mammalian ortholog of the yeast SIR2 gene, in the molecular mechanisms connecting lifespan and adipose tissue.
  • To explore how SIRT1 influences lipid accumulation in adipocytes and its potential impact on lifespan.

Main Methods:

  • Investigating the molecular mechanisms by which SIRT1 affects adipose tissue.
  • Analyzing the role of SIRT1 in repressing peroxisome proliferator-activated receptors gamma transactivation.
  • Examining the inhibition of lipid accumulation in adipocytes by SIRT1.

Main Results:

  • Sirtuin 1 (SIRT1) is implicated in the molecular pathways linking adipose tissue to lifespan.
  • SIRT1 actively represses peroxisome proliferator-activated receptors gamma transactivation.
  • SIRT1 demonstrates an inhibitory effect on lipid accumulation within adipocytes.

Conclusions:

  • Adipose tissue plays a critical role in lifespan regulation.
  • SIRT1 is a key molecular player connecting adipose tissue function to lifespan.
  • Reduced adipose tissue may extend lifespan through adipokine signaling or by preventing metabolic diseases like type 2 diabetes and atherosclerosis.