Diabetes mitigates the recovery following intracranial hemorrhage in rats

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• 作者：Zhenzeng Fan^a ; Yunchao Yuan^a ; Feng Wang^a ; Yuepeng Qi^b ; Haie Han^a ; Jianliang Wu^a ; Gengshen Zhang^a ; Lijun Yang^a ; ^{yanglijun1981@163.com}
• 关键词：ICH ; intracranial hemorrhage ; BBB ; blood brain barrier ; AQPs ; aquaporins ; TBI ; traumatic brain injury
• 刊名：Behavioural Brain Research
• 出版年：2017
• 出版时间：1 March 2017
• 年：2017
• 卷：320
• 期：Complete
• 页码：412-419
• 全文大小：1464 K
• 卷排序：320

文摘

Intracranial hemorrhage (ICH) is a common subtype of stroke with high morbidity and mortality. However, few studies have examined the effects of diabetes on the recovery from ICH-induced brain injury. Therefore, we examined the effects of diabetes on protein levels of aquaporins, neuronal loss, angiogenesis, blood brain barrier (BBB) integrity, and neurological deficits following intra-DH collagenase-induced ICH in the hippocampus. We found that diabetic rats exhibited enhanced AQP9 expression in the hippocampus relative to non-diabetic rats, which was associated with increased behavioral deficits. Additionally, ICH induced neovascularization, proliferation of brain microvascular endothelial cells, and hippocampal neuronal loss. However, ICH-induced neovascularization and proliferation of brain microvascular endothelial cells was severely impaired in diabetic rats. Furthermore, ICH-induced hippocampal neuronal loss was exaggerated in diabetic rats. Finally, ICH impaired BBB integrity in the ipsilateral hemisphere, which was increased in diabetic rats. Taken together, the attenuated brain angiogenesis, increased hippocampal neuronal loss, and impaired BBB integrity in diabetic rats after ICH were associated with enhanced AQP9 expression. This may suggest that AQP9 is one of the underlying mechanisms that can mitigate the recovery from ICH in diabetic populations.