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Therapeutic application of gene silencing MMP-9 in a middle cerebral artery occlusion-induced focal ischemia rat model.

Abstract：

:RNA interference appears to have a great potential not only as an in vitro target validation, but also as a novel therapeutic strategy based on the highly specific and efficient silencing of a target gene. We hypothesize that MMP-9 siRNA can be effective as an MMP-9 protein inhibitor in a rat focal ischemia model. Male Sprague-Dawley rats (156) were subjected to 2 h of middle cerebral artery occlusion (by using the suture insertion method) followed by 24 h of reperfusion. In the treatment group, 5 microl MMP-9 siRNA was administrated by intracerebroventricular injection within 60 min after 2 h of focal ischemia. The siRNA transfection was demonstrated by fluorescence conjugated siRNA. Treatment with MMP-9 siRNA produced a significant reduction in the cerebral infarction volume, brain water content, mortality rate and accompanying neurological deficits. The followings were recorded: Evan's blue and IgG extravasation were reduced; the expression of MMP-9 mRNA and protein were significantly silenced; and immunohistochemistry and Western blot analysis revealed that the expression of MMP-9 and VEGF were reduced while occludin and collagen-IV were up-regulated in brain tissues. Our findings provide evidence that a liposomal formulation of siRNA might be used in vivo to silence the MMP-9 gene and could potentially serve as an important therapeutic alternative in patients with cerebral ischemia.

journal_name

Exp Neurol

journal_title

Experimental neurology

authors

Hu Q,Chen C,Yan J,Yang X,Shi X,Zhao J,Lei J,Yang L,Wang K,Chen L,Huang H,Han J,Zhang JH,Zhou C

doi

10.1016/j.expneurol.2008.11.007

subject

Has Abstract

pub_date

2009-03-01 00:00:00

pages

35-46

issue

1

eissn

0014-4886

issn

1090-2430

pii

S0014-4886(08)00430-5

journal_volume

216

pub_type

杂志文章

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