AUTHOR=Chen Xiqian , Deng Shuwen , Lei Qiang , He Qiang , Ren Yijun , Zhang Yiliu , Nie Jingjing , Lu Wei
TITLE=miR-7-5p Affects Brain Edema After Intracerebral Hemorrhage and Its Possible Mechanism
JOURNAL=Frontiers in Cell and Developmental Biology
VOLUME=8
YEAR=2020
URL=https://www.frontiersin.org/journals/cell-and-developmental-biology/articles/10.3389/fcell.2020.598020
DOI=10.3389/fcell.2020.598020
ISSN=2296-634X
ABSTRACT=Objective: To explore the relationship between miR-7-5p and brain edema after intracerebral hemorrhage and the role of butylphthalide (NBP) in brain edema after intracerebral hemorrhage.
Method: Routine blood testing, C-reactive protein results, and computed tomography data were collected 1, 7, and 14 days after intracerebral hemorrhage in six patients. Levels of MMP-9, ZO-1, occludin, IL-6, TNF-α, and miR-7-5p were detected in each patient's serum. Sixty male Sprague–Dawley rats were randomly divided into sham operation, intracerebral hemorrhage, and NBP treatment groups. Dry–wet weight was used to assess brain edema, and Evans blue staining was used to assess the permeability of the blood–brain barrier. Expression levels of IL-6, TNF-α, ZO-1 and occludin, PI3K, AKT, p-AKT, AQP4, and miR-7-5p were analyzed in the rat brains.
Result: The blood neutrophil–lymphocyte ratio (NLR) on day 1 was associated with the area of brain edema on day 7. The expression of miR-7-5p decreased after intracerebral hemorrhage, and as a result, the inhibition of the PI3K/AKT pathway was weakened. The decreased inhibition of the PI3K/AKT pathway resulted in an increase in AQP4 expression, which further aggravated brain edema. NBP can upregulate the expression of miR-7-5p, affecting these pathways to reduce brain edema.
Conclusion: After intracerebral hemorrhage, miR-7-5p expression in brain tissue is reduced, which may increase the expression of AQP4 by activating the PI3K/AKT pathway. NBP can inhibit this process and reduce brain edema.