The pathological roles of environmental and redox stresses in cardiovascular diseases

Environ Health Prev Med. 2013 May;18(3):177-84. doi: 10.1007/s12199-012-0326-2. Epub 2012 Dec 29.

Abstract

Oxidative stress and inflammation are implicated in cardiovascular diseases such as atherosclerosis, reperfusion injury, hypertension, and heart failure. High levels of oxidative stress resulting from increased cardiac generation of reactive oxygen species (ROS) is thought to contribute to contractile and endothelial dysfunction, apoptosis and necrosis of myocytes, and extracellular matrix remodeling in the heart. ROS activate several transcription factors known as redox-regulated transcription factors, and these transcription factors play important roles in the pathophysiology of cardiovascular diseases. This review focuses on the pathological roles of environmental and redox stresses in cardiovascular diseases, especially severe cardiac dysfunction and the transition from compensated hypertrophy to heart failure. The aryl hydrocarbon receptor (AHR) and NF-E2 p45-related factor (Nrf2) are transcription factors involved in the regulation of drug-metabolizing enzymes. AHR has been studied as a receptor for environmental contaminants and as a mediator of chemical toxicity. However, other roles for AHR in cardiac and vascular development have recently been described. Moreover, Nrf2 protects against oxidative stress by increasing the transcription of genes, including those for several antioxidant enzymes. The roles of these transcription factors, AHR and Nrf2 in angiogenesis are also discussed in this review.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Basic Helix-Loop-Helix Transcription Factors / metabolism*
  • Cardiovascular Diseases / etiology*
  • Cardiovascular Diseases / pathology
  • Environmental Exposure*
  • Environmental Pollutants / toxicity*
  • Humans
  • NF-E2-Related Factor 1 / metabolism*
  • Oxidative Stress*
  • Receptors, Aryl Hydrocarbon / metabolism*

Substances

  • AHR protein, human
  • Basic Helix-Loop-Helix Transcription Factors
  • Environmental Pollutants
  • NF-E2-Related Factor 1
  • NFE2L1 protein, human
  • Receptors, Aryl Hydrocarbon