Effects of Benidipine Hydrochloride on Cerebrovascular Lesions in Salt-Loaded Stroke-Prone Spontaneously Hypertensive Rats: Evaluation by Magnetic Resonance Imaging

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Author(s)

Abstract

We determined possible protective effects of benidipine hydrochloride(benidipine), a dihydropyridine calcium antagonist, on cerebrovascular lesions in salt−loaded stroke−prone spontaneously hypertensive rats(SHRSP).The animals were orally treated with benidipine at 1, 3 and 10 mg/kg daily for 7 weeks, and their neurological symptoms, body weight changes, systolic blood pressure and cerebrovascular lesions on magnetic resonance imaging(MRI)were determined at various time points of treatment.Moreover, the brains of the rats that showed cerebrovascular lesions on MRI in the course of treatment or completed 7−week treatment were examined histopathologically.Control rats presented such symptoms as sedation, ataxia and aggressiveness, while their MRI analysis revealed high signals over wide areas from the occipital to frontal cortex and from the corpus callosum to external capsule.These high signal areas corresponded in location to edematous or softening lesions revealed by the histopathological observation.Treatment with benidipine at 3 and 10 mg/kg ameliorated neurological symptoms, significantly suppressing cerebrovascular damages on MRI.Benidipine at 3 mg/kg significantly decreased blood pressure for the first four weeks but it did not thereafter.These findings demonstrate that benidipine can protect salt−loaded SHRSP from cerebrovascular injury as assessed by MRI.

Journal

  • The Japanese Journal of Pharmacology

    The Japanese Journal of Pharmacology 84(1), 56-62, 2000-09-01

    The Japanese Pharmacological Society

References:  31

Cited by:  3

Codes

  • NII Article ID (NAID)
    10008185150
  • NII NACSIS-CAT ID (NCID)
    AA00691188
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    00215198
  • NDL Article ID
    5526085
  • NDL Source Classification
    ZS51(科学技術--薬学)
  • NDL Call No.
    Z53-D199
  • Data Source
    CJP  CJPref  NDL  J-STAGE 
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