Calcium antagonist isradipine reduces metabolic alterations in acute cerebral ischemia in spontaneously hypertensive rats

Setsuro Ibayashi, Tetsuhiko Nagao, Takanari Kitazono, Hiroaki Ooboshi, Jiro Kitayama, Seizo Sadoshima, Masatoshi Fujishima

研究成果: ジャーナルへの寄稿記事

1 引用 (Scopus)

抄録

The present study was designed to examine the effect of a calcium antagonist isradipine (PN200110: PN) on local cerebral blood flow and brain tissue metabolism after 1-hour supratentorial ischemia induced by bilateral carotid artery ligation (BCL) in spontaneously hypertensive rats (SHR). PN, dissolved in ethanol plus polyethylene glycol 400, diluted with saline to make the final concentration of 0.25 mg/ml and 2.5 mg/ml, was administered subcutaneously either 30 min prior to BCL or just after the induction of incomplete cerebral ischemia (n = 7 in each group). Vehicle injection was served as a control group (n = 7). Cerebral blood flow in the parietal cortex (CBF) and the cerebellar cortex (CeBF) was measured by hydrogen clearance technique, and the supra- and infratentorial metabolites of the brain frozen in situ were determined by the enzymatic method. Blood pressure was lowered, but CBF was increased by PN administration in pre-BCL treatment study. After 1 hour of BCL, CBF decreased to around 10% or less of the resting value, being insignificant among the groups. Brain adenosine triphosphate was better preserved in PN-administered groups. The increase in lactate level tended to reduce dose dependently by PN treatment. PN also reduced the metabolic alterations in brain tissue with significance, even when administered just after the induction of forebrain ischemia. It is considered that pre- as well as post-BCL administration of PN is beneficial to attenuate the metabolic alterations in incomplete forebrain ischemia in SHR.

元の言語英語
ページ(範囲)349-355
ページ数7
ジャーナルNeurochemical Research
25
発行部数3
DOI
出版物ステータス出版済み - 4 2 2000

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Isradipine
Inbred SHR Rats
Brain Ischemia
Carotid Arteries
Ligation
Rats
Brain
Calcium
Cerebrovascular Circulation
Ischemia
Prosencephalon
Blood
Tissue
Blood pressure
Metabolites
Parietal Lobe
Cerebellar Cortex
Metabolism
Hydrogen
Lactic Acid

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Cellular and Molecular Neuroscience

これを引用

Calcium antagonist isradipine reduces metabolic alterations in acute cerebral ischemia in spontaneously hypertensive rats. / Ibayashi, Setsuro; Nagao, Tetsuhiko; Kitazono, Takanari; Ooboshi, Hiroaki; Kitayama, Jiro; Sadoshima, Seizo; Fujishima, Masatoshi.

:: Neurochemical Research, 巻 25, 番号 3, 02.04.2000, p. 349-355.

研究成果: ジャーナルへの寄稿記事

Ibayashi, Setsuro ; Nagao, Tetsuhiko ; Kitazono, Takanari ; Ooboshi, Hiroaki ; Kitayama, Jiro ; Sadoshima, Seizo ; Fujishima, Masatoshi. / Calcium antagonist isradipine reduces metabolic alterations in acute cerebral ischemia in spontaneously hypertensive rats. :: Neurochemical Research. 2000 ; 巻 25, 番号 3. pp. 349-355.
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