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Platelet dysfunction in central obesity

G Anfossi1, I Russo, M Trovati

  • 1Diabetes Unit, Department of Clinical and Biological Sciences of the Turin University, San Luigi Gonzaga Hospital, Orbassano I-10043, Turin, Italy.

Nutrition, Metabolism, and Cardiovascular Diseases : NMCD
|April 7, 2009
PubMed

Insights

Central obesity increases cardiovascular risk due to platelet dysfunction and reduced sensitivity to antiplatelet drugs like aspirin. Tailored therapies are needed for obese, insulin-resistant individuals, especially those with type 2 diabetes.

Area of Science:

  • Cardiovascular Medicine
  • Metabolic Disorders
  • Hematology

Background:

  • Central obesity is a significant risk factor for major cardiovascular events.
  • Platelets play a key role in cardiovascular risk, exhibiting increased activation and reduced sensitivity to antiplatelet agents in obese individuals.
  • Atherosclerosis in coronary, cerebral, and lower limb arteries is exacerbated by central obesity.

Purpose of the Study:

  • To review platelet dysfunction in central obesity.
  • To explore the mechanisms underlying altered platelet function in obesity.
  • To discuss the implications for antiplatelet therapy efficacy in cardiovascular disease prevention.

Main Methods:

  • Review of existing literature on platelet function and central obesity.
  • Analysis of mechanisms including insulin resistance, altered intracellular ions, and oxidative stress.
  • Examination of current therapeutic guidelines and evidence regarding antiplatelet therapy in obese populations.

Main Results:

  • Platelet dysfunction in obesity involves reduced sensitivity to insulin, nitrates, and prostacyclin.
  • Altered intracellular calcium levels and increased oxidative stress contribute to platelet hyperreactivity.
  • Evidence suggests decreased sensitivity to acetylsalicylic acid (aspirin) and thienopyridines in obese subjects.

Conclusions:

  • Platelet defects in central obesity may reduce the efficacy of standard antiplatelet therapies.
  • Obesity-associated insulin resistance and oxidative stress impair platelet function.
  • Personalized antiplatelet strategies are likely necessary for obese, insulin-resistant patients, particularly those with type 2 diabetes, to optimize cardiovascular prevention.

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