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: Contribution to journalArticle査読

    1 被引用数 (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.

    本文言語英語
    ページ(範囲)349-355
    ページ数7
    ジャーナルNeurochemical Research
    25
    3
    DOI
    出版ステータス出版済み - 4 2 2000

    All Science Journal Classification (ASJC) codes

    • Biochemistry
    • Cellular and Molecular Neuroscience

    フィンガープリント 「Calcium antagonist isradipine reduces metabolic alterations in acute cerebral ischemia in spontaneously hypertensive rats」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

    引用スタイル