首页|Electroacupuncture ameliorates blood-brain barrier disruption after ischemic stroke through histone acetylation regulation at the matrix metalloproteinase 9 and tissue inhibitor of metalloproteinase 2 genes

Electroacupuncture ameliorates blood-brain barrier disruption after ischemic stroke through histone acetylation regulation at the matrix metalloproteinase 9 and tissue inhibitor of metalloproteinase 2 genes

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Electroacupuncture ameliorates blood-brain barrier disruption after ischemic stroke through histone acetylation regulation at the matrix metalloproteinase 9 and tissue inhibitor of metalloproteinase 2 genes
OBJECTIVE:To explore whether the regulation of matrix metalloproteinase 9(MMP-9)/tissue inhibitors of MMPs(TIMPs)gene expression through histone acetylation is a possible mechanism by which electroacupuncture(EA)protects blood-brain barrier(BBB)integrity in a middle cerebral artery occlusion(MCAO)rat model.METHODS:Male Sprague-Dawley rats were divided into four groups:the sham group,the MCAO group,the MCAO+EA(MEA)group,and the MCAO+EA+HAT inhibitor(HATi)group.The MCAO model was generated by blocking the middle cerebral artery.EA was applied to Baihui(GV20).Samples were collected 1 or 3 d after reperfusion.Neurological function scores and Evans blue extravasation were employed to evaluate the poststroke injury.The effect of EA on MMP-9/TIMPs gene expression was assessed by real-time fluorescence quantitative polymerase chain reaction(RT-qPCR)and chromatin immunoprecipitation(ChIP).RESULTS:Our results showed that EA treatment prominently improved neurological function and ameliorated BBB disruption.The RT-qPCR assay showed that EA reduced the expression of MMP-9 and promoted TIMP-2 mRNA expression,but HATi reversed these effects of EA.In addition,ChIP results revealed that EA decreased the enrichment of H3K9ace/H3K27ace at MMP-9 promoters and notably stimulated the recruitment of H3K9ace/H3K27ace at TIMP-2 promoter.CONCLUSION:EA treatment at Baihui(GV20)regulates the transcription of MMP-9 and TIMP-2 through histone acetylation modification in the acute stage of stroke,which preserves the structural integrity of the BBB in MCAO rats.These findings suggested that the histone acetylation-mediated transcriptional activity of target genes may be a crucial mechanism of EA treatment in stroke.

blood-brain barriermatrix metalloproteinase 9tissue inhibitor of metalloproteinaseselectroacupuncturehistone acetylation

CHEN Yonglin、OUYANG Ling、MENG Lingling、WU Bufan、PENG Rou、LIU Sitong、HOU Dan、WANG Yaling、JING Xinyue、LU Shengfeng、FU Shuping

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Key Laboratory of Acupuncture and Medicine Research of Ministry of Education,Nanjing University of Chinese Medicine,Nanjing 210023,China

blood-brain barrier matrix metalloproteinase 9 tissue inhibitor of metalloproteinases electroacupuncture histone acetylation

2024

10.19852/j.cnki.jtcm.20240610.004

中医杂志(英文版)
中国中医药学会 中国中医研究院

中医杂志(英文版)

影响因子：0.855
ISSN：0255-2922
年,卷(期)：2024.44(4)