雌性自发性高血压大鼠高血压发展过程中脑干自主神经控制回路中微小RNA网络的动态重塑
Dynamic rewiring of microRNA networks in the brainstem autonomic control circuits during hypertension development in the female spontaneously hypertensive rat.
作者信息
Moss Alison, Srivastava Ankita, Kuttippurathu Lakshmi, Schwaber James S, Vadigepalli Rajanikanth
机构信息
Daniel Baugh Institute for Functional Genomics and Computational Biology, Department of Pathology and Genomic Medicine, Thomas Jefferson University, Philadelphia, PA, USA.
出版信息
Physiol Genomics. 2025 Jul 18. doi: 10.1152/physiolgenomics.00136.2024.
We describe global miRNA changes in the central autonomic control circuits during the development of neurogenic hypertension. Using the female spontaneously hypertensive rat (SHR) and the normotensive Wistar Kyoto (WKY), we analyzed the dynamic miRNA expression changes in three brainstem regions, the nucleus of the solitary tract (NTS), caudal ventrolateral medulla (CVLM), and rostral ventrolateral medulla (RVLM) as a time series beginning at 8 weeks of age prior to hypertension onset through to extended chronic hypertension. Our analysis yielded nine miRNAs that were significantly differentially regulated in all three regions between SHR and WKY over time. We collated computationally predicted gene targets of these nine miRNAs in pathways related to neuronal plasticity and autonomic regulation to construct a putative miRNA target gene network involved in the development of neurogenic hypertension. We analyzed the dynamic correlations between the miRNAs and their putative targets to identify the regulatory interactions shifting between WKY and SHR. Comparing the results with previously published data in male SHR and WKY identified miRNA network dynamics specific to female SHR during hypertension development. Collectively, our results point to distinct rewiring of the miRNA regulatory networks governing angiotensin signaling and homeostasis, neuronal plasticity, and inflammatory processes contributing to the development of hypertension in female SHR.
我们描述了神经源性高血压发展过程中中枢自主控制回路中全局微小RNA(miRNA)的变化。我们使用雌性自发性高血压大鼠(SHR)和血压正常的Wistar Kyoto大鼠(WKY),分析了从高血压发作前8周开始直至长期慢性高血压阶段,三个脑干区域,即孤束核(NTS)、延髓尾端腹外侧区(CVLM)和延髓头端腹外侧区(RVLM)中miRNA表达的动态变化。我们的分析发现,随着时间推移,SHR和WKY之间在所有这三个区域中均有9种miRNA受到显著差异调节。我们整理了这9种miRNA在与神经元可塑性和自主调节相关通路中的计算机预测基因靶点,以构建一个与神经源性高血压发展相关的假定miRNA靶基因网络。我们分析了miRNA与其假定靶点之间的动态相关性,以确定WKY和SHR之间转移的调节相互作用。将结果与先前发表的雄性SHR和WKY的数据进行比较,确定了雌性SHR在高血压发展过程中特定的miRNA网络动态变化。总体而言,我们的结果表明,在雌性SHR中,调控血管紧张素信号传导及内稳态、神经元可塑性和炎症过程的miRNA调控网络发生了明显的重新布线,这些过程促进了高血压的发展。
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