BK channels in cardiovascular diseases and aging

João Luis Carvalho-de-Souza, Wamberto A. Varanda, Rita C. Tostes, Andreia Z. Chignalia

Research output: Contribution to journalReview articlepeer-review

23 Scopus citations

Abstract

Aging is a major risk factor for cardiovascular diseases, one of the main world-wide causes of death. Several structural and functional changes occur in the cardiovascular system during the aging process and the mechanisms involved in such alterations are yet to be completely described. BK channels are transmembrane proteins that play a key role in many physiological processes, including regulation of vascular tone. In vascular smooth muscle cells, BK opening and the consequent efflux of potassium (K+) leads to membrane hyperpolarization, which is followed by the closure of voltage-dependent Ca2+ channels, reduction of Ca2+ entry and vasodilatation. BK regulates nitric oxide-mediated vasodilatation and thus is crucial for normal endothelial function. Herein we will briefly review general structural properties of BK and focus on their function in the cardiovascular system emphasizing their role in cardiovascular aging and diseases.

Original languageEnglish (US)
Pages (from-to)38-49
Number of pages12
JournalAging and Disease
Volume4
Issue number1
StatePublished - 2013
Externally publishedYes

Keywords

  • Aging
  • BK
  • Calcium-activated potassium channels
  • Cardiovascular diseases
  • Endothelium
  • Vascular smooth muscle cells

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Geriatrics and Gerontology
  • Clinical Neurology
  • Cell Biology

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