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Hypertension in metabolic syndrome: vascular pathophysiology

Yolanda Mendizábal1, Silvia Llorens, Eduardo Nava

  • 1Department of Medical Sciences, University of Castilla-La Mancha, School of Medicine and Regional Centre for Biomedical Research (CRIB), 02006 Albacete, Spain.

International Journal of Hypertension
|April 11, 2013
PubMed

Insights

Metabolic syndrome involves insulin resistance and vascular issues. This study explores the imbalance favoring vasoconstriction, impacting blood pressure and endothelial function, with potential therapeutic insights from animal models.

Area of Science:

  • Cardiovascular Medicine
  • Endocrinology
  • Metabolic Disorders

Background:

  • Metabolic syndrome is a cluster of cardiovascular and metabolic conditions, including insulin resistance, obesity, and dyslipidemia.
  • Hypertension and vascular dysfunction are key features, with sympathetic tone and endothelial function playing significant roles.

Purpose of the Study:

  • To review the historical context and current understanding of metabolic syndrome's vascular aspects.
  • To examine the relationship between endothelial dysfunction, insulin resistance, and the nitric oxide (NO) system.
  • To explore the insulin hypothesis of hypertension and the role of perivascular adipose tissue.

Main Methods:

  • Review of literature on sympathetic tone, endothelial function, and insulin resistance.
  • Analysis of insulin-signaling pathways involving nitric oxide (NO) synthase, Akt, and MAPK.
  • Discussion of animal models like the Zucker fatty rat and SHROB for studying vascular function in metabolic syndrome.

Main Results:

  • Insulin resistance is linked to an imbalance in endothelial pathways, favoring vasoconstriction over vasodilation.
  • Dysfunctional NO pathways and increased vasoconstrictor prostaglandins contribute to vascular issues in models like SHROB.
  • Glitazones show potential in alleviating vascular problems associated with metabolic syndrome.

Conclusions:

  • Understanding the interplay between insulin resistance and vascular pathways is crucial for metabolic syndrome management.
  • Animal models provide valuable insights into the pathophysiology of vascular dysfunction in metabolic syndrome.
  • Targeting NO pathways and vasoconstrictor mechanisms may offer therapeutic strategies for metabolic syndrome.

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