PROTECTIVE EFFECT OF NICARDIPINE TREATMENT ON CEREBROVASCULAR MICRO ANATOMICAL CHANGES IN SPONTANEOUSLY HYPERTENSIVE RATS

Francesco Amenta, Fabio Fenante, Alberto Ricci, Maurizio Sabbatini

Risultato della ricerca: Contributo su rivistaArticolo in rivistapeer review

Abstract

1. The effect of long‐term treatment with the dihydropyridine Ca2+ antagonist, nicardipine, on the morphology of different sized pial arteries was assessed in spontaneously hypertensive rats (SHR) using histological techniques associated with image analysis. 2. In control 20 week old SHR blood pressure values, the thickness of the tunica media, the media‐to‐lumen ratio and connective tissue content were significantly increased in comparison with reference normotensive Wistar‐Kyoto (WKY) rats. 3. Treatment for 8 weeks with a daily dose of 3 mg/kg of nicardipine decreased blood pressure values in SHR and significantly reduced the area occupied by the tunica media and the media‐to‐lumen ratio. This effect was observed primarily in small sized pial arteries and to a lesser extent in medium sized pial arteries. Nicardipine administration was without effect on connective tissue content in the wall of cerebral arteries. 4. These results indicate that treatment with nicardipine reduces blood pressure elevation in SHR and exerts a protective effect on arteries controlling cerebrovascular resistance. The activity of the compound primarily on small sized pial arteries may protect the brain from generalized vasodilation which could cause cerebral hypoperfusion.

Lingua originaleInglese
pagine (da-a)S331-S332
RivistaClinical and Experimental Pharmacology and Physiology
Volume22
DOI
Stato di pubblicazionePubblicato - nov 1995
Pubblicato esternamente

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