期刊
NEUROSCIENCE LETTERS
卷 621, 期 -, 页码 88-97出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.neulet.2016.04.018
关键词
Hydrogen sulfide; Subarachnoid hemorrhage; Brain edema; Blood-brain barrier; AQP4
资金
- National Natural Science Foundation of China [81571106]
- Scientific and Technological Project of Zhejiang Province [Y15H090022]
Aims: This study investigated the effect of H2S on brain edema formation and the possible underlying mechanisms in early brain injury (EBI) of SAH using the endovascular perforation model. Methods: 96 male rats were randomly divided into four groups: sham group, SAH + vehicle group, SAH + low-dosage NaHS group, and SAH + high-dosage NaHS group. Brain samples were used for brain water content and blood-brain barrier (BBB) leakage measurement, gelatin zymography, Western blot and immunohistochemistry. Results: H2S markedly attenuated brain edema formation and apoptotic cell death, improved neurological dysfunction in the acute stage of SAH. The possible mechanisms of H2S's effect on brain edema formation were through preventing BBB disruption and reducing APQ4 expression on astrocytes. In detail, H2S prevented BBB disruption by inhibiting MMP-9 induced tight junction proteins (TJPs) degradation. H2S down-regulated AQP4 expression on astrocytes by suppressing glial cell activation and pro-inflammatory cytokines secretion. Conclusion: Taken together, this study showed that H2S attenuated brain edema formation partially by inhibiting the degradation of TJPs via reducing MMP-9 expression activity and suppressing AQP4 expression via alleviating glia activation and pro-inflammatory cytokines secretion. (C) 2016 Elsevier Ireland Ltd. All rights reserved.
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