Journal
FITOTERAPIA
Volume 81, Issue 8, Pages 1094-1101Publisher
ELSEVIER
DOI: 10.1016/j.fitote.2010.07.004
Keywords
Mitochondria function; Oxidative stress; Reactive oxygen species (ROS); Electron transfer chain; Mitochondrial membrane potential
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The aim of the present study is to investigate the protective effect of bilberry extract on liver damage in restraint stressed mice. A remarkable increase in alanine aminotransferase (ALT) and reactive oxygen species (ROS) levels was observed in stressed mice. Treatment with bilberry extract restored ALT and ROS to normal levels, and enhanced mitochondrial complex II activity that was lowered in restraint stressed mice. The mitochondrial electron transfer chain (ETC)-related gene expression was measured by RT-PCR, and a significant up-regulation of complex II mRNA was observed for SDHA, B, C and D mRNA in bilberry extract-treated group compared with that in stressed group. Bilberry extract administration also profoundly elevated the Na+-K+-ATPase activity and mitochondria membrane potential (Delta Psi(m)), which was reduced in the stressed group. Bilberry extract exhibited protective effect by scavenging free radicals and attenuating mitochondrial dysfunction in the liver of restraint stressed mice. It may be used as a promising therapeutic agent in preventing and delaying the life-related disease. (C) 2010 Elsevier B.V. All rights reserved.
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