Therapeutic effect of dexmedetomidine on intracerebral hemorrhage via regulating NLRP3.

Abstract:

OBJECTIVE:To investigate the protective effect of dexmedetomidine on intracerebral hemorrhage (ICH) mice and the underlying mechanism. MATERIALS AND METHODS:The in vivo ICH model was induced by the injection of autologous blood in C57BL/6 mice. Mice were randomly assigned into control group (no specific treatment) and treatment group (dexmedetomidine administration). Mouse neuronal deficits were evaluated by modified neurological severity scores (mNSS) and Corner Turn Test. ICH volume and cerebral edema at the hemisphere of lesions were determined. Inflammatory response at post-ICH was examined by flow cytometry and quantitative Real Time-Polymerase Chain Reaction (qRT-PCR). The integrity and permeability of blood brain barrier (BBB) were detected by Western blot and Evans Blue extravasation. RESULTS:Dexmedetomidine treatment markedly alleviated the clinical symptoms of ICH mice, and decreased ICH volume and cerebral edema. QRT-PCR data revealed down-regulated levels of NLRP3, ASC, Caspase-1, and IL-1β in mice of the treatment group relative to controls. Moreover, dexmedetomidine administration decreased contents of CD11b+CD45int, IL-6, and IL-1β, but elevated TGF-β content in treatment group. The Evans Blue leakage was reduced in mice of the treatment group. Both protein and mRNA levels of Claudin-5 and ZO-1 were upregulated in the treatment group. CONCLUSIONS:Dexmedetomidine remarkably inhibits the activation of inflammasome, alleviates secondary cerebral injury and inflammation, and protects the integrity and permeability of BBB at post-ICH.

authors

Song HL,Zhang SB

doi

10.26355/eurrev_201903_17411

subject

Has Abstract

pub_date

2019-03-01 00:00:00

pages

2612-2619

issue

6

eissn

1128-3602

issn

2284-0729

journal_volume

23

pub_type

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