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Table of Contents
Vol. 51, No. 3, 2014
Issue release date: August 2014
Section title: Review
J Vasc Res 2014;51:175-189
(DOI:10.1159/000360765)

Mitochondrial Mechanisms in Cerebral Vascular Control: Shared Signaling Pathways with Preconditioning

Busija D.W. · Katakam P.V.
Department of Pharmacology, Tulane University School of Medicine, New Orleans, La., USA

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Article / Publication Details

First-Page Preview
Abstract of Review

Received: 10/14/2013
Accepted: 2/19/2014
Published online: 5/22/2014

Number of Print Pages: 15
Number of Figures: 7
Number of Tables: 0

ISSN: 1018-1172 (Print)
eISSN: 1423-0135 (Online)

For additional information: http://www.karger.com/JVR

Abstract

Mitochondrial-initiated events protect the neurovascular unit against lethal stress via a process called preconditioning, which independently promotes changes in cerebrovascular tone through shared signaling pathways. Activation of adenosine triphosphate (ATP)-dependent potassium channels on the inner mitochondrial membrane (mitoKATP channels) is a specific and dependable way to induce protection of neurons, astroglia, and cerebral vascular endothelium. Through the opening of mitoKATP channels, mitochondrial depolarization leads to activation of protein kinases and transient increases in cytosolic calcium (Ca2+) levels that activate terminal mechanisms that protect the neurovascular unit against lethal stress. The release of reactive oxygen species from mitochondria has similar protective effects. Signaling elements of the preconditioning pathways also are involved in the regulation of vascular tone. Activation of mitoKATP channels in cerebral arteries causes vasodilation, with cell-specific contributions from the endothelium, vascular smooth muscles, and nerves. Preexisting chronic conditions, such as insulin resistance and/or diabetes, prevent preconditioning and impair relaxation to mitochondrial-centered responses in cerebral arteries. Surprisingly, mitochondrial activation after anoxic or ischemic stress appears to protect cerebral vascular endothelium and promotes the restoration of blood flow; therefore, mitochondria may represent an important, but underutilized target in attenuating vascular dysfunction and brain injury in stroke patients.


Article / Publication Details

First-Page Preview
Abstract of Review

Received: 10/14/2013
Accepted: 2/19/2014
Published online: 5/22/2014

Number of Print Pages: 15
Number of Figures: 7
Number of Tables: 0

ISSN: 1018-1172 (Print)
eISSN: 1423-0135 (Online)

For additional information: http://www.karger.com/JVR


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