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• W2549909573 abstract "17β-estradiol (E2) and progesterone (P) are neuroprotective factors in the brain preventing neuronal death under different injury paradigms. In previous studies, we demonstrated that both steroids dampen neuronal damage, improve local energy metabolism and attenuate pro-inflammatory responses. MicroRNAs (miRNAs) are small regulators of distinct target genes on the RNA level. Their expression patterns are misbalanced in several neurological disorders. To explore the regulatory mechanisms of steroid hormones on selected miRNAs and their validated targets in ischemia, we used the transient middle cerebral artery occlusion (tMCAO) model. 12-week old male rats were subjected to 2 h tMCAO and expression patterns of miR‐223, miR‐200c, miR‐375, miR‐199 and miR‐214 (all −3p) were determined. Using semi-quantitative real time PCR, we examined the role of E2 or P as regulatory factors for miRNAs and theirs target genes. Besides miR-375, all mentioned miRNAs showed a steady increase with a peak at 72 h post tMCAO, whereas highest levels of miR-375 were detected at 12 h post tMCAO. E2 or P selectively dampened miR-223 and miR-214 but further boosted miR-375 levels. With respect to the miR-223 regulated target genes NR2B and GRIA2 which both decreased after tMCAO, E2 and P application reversed this effect. Further, steroid treatment inhibited the hypoxia-induced increase of the miR-375 target genes Bcl-2 and RAD1. These findings provide new insights into the regulatory role of neuroprotection mediated by sex steroids in the brain. Both hormones are capable of influencing the expression of miRNAs which are relevant during neuropathological processes. Thereby, E2 and P indirectly control pro-apoptotic and −inflammatory gene translation and provide a mechanism to dampen explosive tissue damage." @default.
• W2549909573 created "2016-11-30" @default.
• W2549909573 creator A5035197522 @default.
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• W2549909573 date "2017-03-01" @default.
• W2549909573 modified "2023-10-18" @default.
• W2549909573 title "Impact of 17beta-estradiol and progesterone on inflammatory and apoptotic microRNA expression after ischemia in a rat model" @default.
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• W2549909573 doi "https://doi.org/10.1016/j.jsbmb.2016.11.018" @default.
• W2549909573 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/27884727" @default.
• W2549909573 hasPublicationYear "2017" @default.
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