Nifedipine treatment reduces brain damage after transient focal ischemia, possibly through its antioxidative effects

Mayumi Yamato, Takeshi Shiba, Tomomi Ide, Youhei Honda, Ken Ichi Yamada, Hiroyuki Tsutsui

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Stroke is a major cause of mortality and morbidity in hypertensive patients. This study investigated the effects of nifedipine, an L-type voltage-gated Ca 2+ channel blocker, on ischemic lesion volume after focal cerebral ischemia and reperfusion in rats. Rats were subjected to 1 h of transient middle cerebral artery occlusion (MCAO). At 2 days after MCAO, the rats were randomized into two groups that were fed either a normal control diet (n=10) or a nifedipine (0.001%) containing diet (n=11) for 2 weeks. Nifedipine treatment significantly reduced ischemic lesion volume (116.5±10.8 vs. 80.0±8.2 mm 3, P<0.05) without affecting body weight or blood pressure. It also decreased thiobarbituric-reactive substances, an index of lipid peroxide, (2.6±0.4 vs. 1.7±0.1 mol g -1 tissue, P<0.05) and increased glutathione peroxidase (54.9±4.7 vs. 70.9±6.4 U g -1 protein, P<0.05) and glutathione reductase activities (32.4±1.4 vs. 39.9±2.7 U g -1 protein, P<0.05) in the mitochondria from the ischemic hemispheres. These results suggest that nifedipine treatment can reduce ischemic lesion volume after focal cerebral ischemia, possibly because of the decrease in oxidative stress with an increase in antioxidant activities within the ischemic area.

Original languageEnglish
Pages (from-to)840-845
Number of pages6
JournalHypertension Research
Volume34
Issue number7
DOIs
Publication statusPublished - Jul 2011

All Science Journal Classification (ASJC) codes

  • Internal Medicine
  • Physiology
  • Cardiology and Cardiovascular Medicine

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