当前位置： SCI文献检索 > JOURNAL OF PHARMACOLOGICAL AND TOXICOLOGICAL METHODS期刊下所有文献 > A simple and reproducible cerebral thrombosis model in rats induced by a photochemical reaction and the effect of a plasminogen-plasminogen activator chimera in this model.

A simple and reproducible cerebral thrombosis model in rats induced by a photochemical reaction and the effect of a plasminogen-plasminogen activator chimera in this model.

Abstract：

:In this study a new model of cerebral ischemia, based on a middle cerebral artery (MCA) thrombosis in rats is described. Furthermore, the effect of the novel plasminogen activator (SUN9216), a plasminogen-plasminogen activator chimera, comprising the fibrin kringle 1 domain of a plasminogen, and the two kringles, and the serine protease domains of wild-type tissue plasminogen activator (t-PA), including a modification of the mannose glycosylation site on the kringle 1 of t-PA (PK1de1FE1X), was studied in this model. In the newly described model of thrombotic cerebral ischemia, an occlusive thrombus occurred usually within 8 min in the MCA as a consequence of an endothelial injury subsequent to a photochemical reaction between a systemically administered photosensitive dye (rose bengal) and a transillumination of the MCA with a high-intensity green light with a wavelength of 540 nm. The study was quantitated by means of pathological examination of the MCA and the brain. A platelet-rich thrombus was observed in the MCA using electron microscopical analysis based on ion beam bombardment. At 24 hr after induction of the thrombus, the brain was removed from 13 control animals, nine coronal sections were stained from each brain with triphenyltetrazoliumchloride (TTC), and the ischemic area was quantitated. A constant area of infarction was observed in the cortex and the lateral part of the basal ganglia. In a second group (n = 8), at 1 or 8 weeks after induction of the thrombosis in the MCA, the coronal sections were stained with hematoxylin and eosin.(ABSTRACT TRUNCATED AT 250 WORDS)

journal_name

J Pharmacol Toxicol Methods

journal_title

Journal of pharmacological and toxicological methods

authors

Matsuno H,Uematsu T,Umemura K,Takiguchi Y,Asai Y,Muranaka Y,Nakashima M

doi

10.1016/1056-8719(93)90068-p

subject

Has Abstract

pub_date

1993-06-01 00:00:00

pages

165-73

issue

3

eissn

1056-8719

issn

1873-488X

pii

1056-8719(93)90068-P

journal_volume

29

pub_type

杂志文章

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