Nicardipine reduces calcium accumulation and electrolyte derangements in regional cerebral ischemia in rats.

Abstract:

:We studied the effects of the calcium channel blocker nicardipine on regional tissue Ca2+, Na+, K+, and water shifts in the brains of seven Sprague-Dawley rats after permanent occlusions of the middle cerebral artery. We also assessed the entry of [14C]nicardipine into the brains of five rats; the highest concentrations of [14C]nicardipine were in the infarcted area. Nicardipine treatment significantly reduced Ca2+ accumulation in the middle cerebral artery territory by 60% compared with six untreated rats 6 hours after arterial occlusion. Eight 125-micrograms/kg boluses of nicardipine given every 30 minutes starting 5 minutes after arterial occlusion also significantly reduced the Na+ and K+ shifts in the middle cerebral artery territory by 40% and 50%, respectively, 6 hours after arterial occlusion. Nicardipine appears to reduce Ca2+ accumulation more than it reduces Na+ and water accumulation and K+ loss. Our results suggest that a calcium channel blocker can protect brain tissues in a model of focal cerebral infarction by directly reducing Ca2+ entry into ischemic cells.

journal_name

Stroke

journal_title

Stroke

authors

Hadani M,Young W,Flamm ES

doi

10.1161/01.str.19.9.1125

subject

Has Abstract

pub_date

1988-09-01 00:00:00

pages

1125-32

issue

9

eissn

0039-2499

issn

1524-4628

journal_volume

19

pub_type

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