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International Journal of Vascular Medicine
Volume 2010 (2010), Article ID 834060, 10 pages
http://dx.doi.org/10.1155/2010/834060
Review Article

Caffeine's Vascular Mechanisms of Action

Laboratorio de Investigación en Función Vascular, Departamento de Investigaciones, Fundación CardioInfantil—Instituto de Cardiología, Carrera 13b no. 163-85, Torre A, Piso 3., Bogotá, Colombia

Received 6 April 2010; Accepted 30 June 2010

Academic Editor: Raphael Guzman

Copyright © 2010 Darío Echeverri et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Caffeine is the most widely consumed stimulating substance in the world. It is found in coffee, tea, soft drinks, chocolate, and many medications. Caffeine is a xanthine with various effects and mechanisms of action in vascular tissue. In endothelial cells, it increases intracellular calcium stimulating the production of nitric oxide through the expression of the endothelial nitric oxide synthase enzyme. Nitric oxide is diffused to the vascular smooth muscle cell to produce vasodilation. In vascular smooth muscle cells its effect is predominantly a competitive inhibition of phosphodiesterase, producing an accumulation of cAMP and vasodilation. In addition, it blocks the adenosine receptors present in the vascular tissue to produce vasoconstriction. In this paper the main mechanisms of action of caffeine on the vascular tissue are described, in which it is shown that caffeine has some cardiovascular properties and effects which could be considered beneficial.