Ultrastructural characteristics of occluded perforating arteries in stroke-prone spontaneously hypertensive rats.

Abstract:

:We studied ultrastructurally cerebral perforating arteries in 60 stroke-prone spontaneously hypertensive rats (SHRSP), which were sequentially killed at 4-52 weeks of age before showing symptoms of stroke. Another 24 SHRSP were killed soon after they showed symptoms of cerebral infarction. The initial vascular lesions observed in the asymptomatic group included focal cytoplasmic necrosis in the outer layers of the media. This change progressed to widespread medial necrosis with time. In the infarction group, numerous monocytes were seen adhering to the endothelium of the arteries having advanced medial damage. Following the adherence of monocytes to the endothelium, large amounts of plasma components were visible in the arterial wall. The accumulation of the plasma components (especially fibrin) thickened the wall, narrowed the lumen, and resulted in occlusion. These results suggest that monocytes may affect the endothelium, perhaps disturbing the so-called blood-brain barrier to proteins. The monocytes may therefore be closely related to the occurrence of arterial occlusion with resultant cerebral infarction.

journal_name

Stroke

journal_title

Stroke

authors

Tagami M,Nara Y,Kubota A,Sunaga T,Maezawa H,Fujino H,Yamori Y

doi

10.1161/01.str.18.4.733

subject

Has Abstract

pub_date

1987-07-01 00:00:00

pages

733-40

issue

4

eissn

0039-2499

issn

1524-4628

journal_volume

18

pub_type

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