MicroRNA responses to focal cerebral ischemia in male and female mouse brain.

MicroRNA responses to focal cerebral ischemia in male and female mouse brain.
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DOI:
10.3389/fnmol.2014.00011
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发表时间:
2014
影响因子:
4.8
通讯作者:
Saugstad JA
Saugstad JA
中科院分区:
医学2区
文献类型:
--
作者:
Lusardi TA;Murphy SJ;Phillips JI;Chen Y;Davis CM;Young JM;Thompson SJ;Saugstad JA

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在不同的种族背景和国籍中,男性中风的发生频率高于女性。我们的实验室和其他人的工作已经揭示了对脑缺血的性别特异性敏感性,即男性比女性表现出更大程度的脑缺血事件导致的脑损伤。先前的研究表明,雄性脑缺血可调节microRNA (miRNA)的表达;然而,迄今为止还没有研究检测缺血对女性miRNA反应的影响。因此,我们使用miRNA阵列检测了男性和女性大脑对脑缺血的miRNA反应。这些研究表明,在男性和女性大脑中,缺血既会导致普遍的miRNA反应,也会导致不同性别对挑战的不同反应。对男性或女性缺血性脑中增加的mirna进行靶标预测分析,揭示了基因靶点和蛋白通路的性别特异性差异。这些数据支持脑缺血两性二态反应的机制包括男性和女性大脑中miRNA的明显变化,以及两者共同的miRNA特征反应。
Stroke occurs with greater frequency in men than in women across diverse ethnic backgrounds and nationalities. Work from our lab and others have revealed a sex-specific sensitivity to cerebral ischemia whereby males exhibit a larger extent of brain damage resulting from an ischemic event compared to females. Previous studies revealed that microRNA (miRNA) expression is regulated by cerebral ischemia in males; however, no studies to date have examined the effect of ischemia on miRNA responses in females. Thus, we examined miRNA responses in male and female brain in response to cerebral ischemia using miRNA arrays. These studies revealed that in male and female brains, ischemia leads to both a universal miRNA response as well as a sexually distinct response to challenge. Target prediction analysis of the miRNAs increased in male or female ischemic brain reveal sex-specific differences in gene targets and protein pathways. These data support that the mechanisms underlying sexually dimorphic responses to cerebral ischemia includes distinct changes in miRNAs in male and female brain, in addition to a miRNA signature response to ischemia that is common to both.
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