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Published on: March 28, 2013

PPAR-gamma in the Cardiovascular System

Sheng Zhong Duan1, Christine Y Ivashchenko, Michael G Usher

  • 1Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI 48109, USA.

PPAR Research
|February 22, 2008
PubMed

Insights

Peroxisome proliferator-activated receptor-gamma (PPAR-gamma) is crucial for metabolism and cardiovascular health. While its agonists show benefits, recent studies question their cardiovascular safety, highlighting complex interactions.

Area of Science:

  • Molecular biology
  • Endocrinology
  • Cardiovascular research

Background:

  • Peroxisome proliferator-activated receptor-gamma (PPAR-gamma) regulates adipogenesis, lipid metabolism, insulin sensitivity, and glucose homeostasis.
  • PPAR-gamma is implicated in inflammatory cells and cardiovascular diseases (CVD) including hypertension, cardiac hypertrophy, heart failure, and atherosclerosis.

Purpose of the Study:

  • To review the role of PPAR-gamma in metabolic regulation and cardiovascular health.
  • To examine the cardiovascular effects of PPAR-gamma agonists (thiazolidinediones, TZDs).
  • To discuss the implications of human genetic studies and recent controversial clinical findings on PPAR-gamma and CVD.

Main Methods:

  • Literature review of PPAR-gamma's function in metabolic and inflammatory processes.
  • Analysis of studies on thiazolidinediones (TZDs) in insulin resistance, lipid profiles, blood pressure, and atherosclerosis.
  • Examination of human genetic data linking PPAR-gamma variations to CVD.
  • Consideration of recent clinical trial outcomes regarding PPAR-gamma agonists and cardiovascular events.

Main Results:

  • PPAR-gamma agonists (TZDs) improve insulin sensitivity, lower glucose, reduce lipids, decrease blood pressure, and mitigate atherosclerosis in models of insulin resistance.
  • Human genetic studies associate functional PPAR-gamma changes with increased CVD risk.
  • Recent clinical studies present conflicting data on the cardiovascular safety of PPAR-gamma agonists.

Conclusions:

  • PPAR-gamma plays a significant role in both metabolic regulation and cardiovascular pathophysiology.
  • While TZDs offer metabolic benefits, their cardiovascular impact requires careful consideration due to complex and sometimes controversial findings.
  • Future research should focus on elucidating the intricate relationship between PPAR-gamma, metabolic factors, and cardiovascular disease progression.

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