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首页> 外文期刊>Clinical and experimental pharmacology & physiology >Different regulation of miR-29a-3p in glomeruli and tubules in an experimental model of angiotensin II-dependent hypertension: potential role in renal fibrosis.
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Different regulation of miR-29a-3p in glomeruli and tubules in an experimental model of angiotensin II-dependent hypertension: potential role in renal fibrosis.

机译:在血管紧张素II依赖性高血压实验模型中,肾小球和肾小管中miR-29a-3p的不同调节:在肾纤维化中的潜在作用。

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The aim of this study was to evaluate the role of the angiotensin II (Ang II) induced-differential miRNA expression in renal glomerular and tubulo-interstitial fibrosis in an experimental model of Ang II-dependent hypertension. To clarify this issue, Sprague Dawley rats were treated with Ang II (200?ng/kg per minute, n?=?15) or physiological saline (n?=?14) for 4?weeks. Systolic blood pressure and albuminuria were measured every 2?weeks. At the end of the experimental period, renal glomerular and tubulo-interstitial fibrosis was evaluated by histomorphometric analysis, after Sirius-Red and Masson's trichrome staining. Ang II increased systolic blood pressure (P?
机译:这项研究的目的是评估血管紧张素II(Ang II)诱导的差异性miRNA在肾小球和肾小管间质纤维化的肾小球II依赖性高血压实验模型中的作用。为了澄清这个问题,将Sprague Dawley大鼠用Ang II(200?ng / kg每分钟,n?=?15)或生理盐水(n?=?14)治疗4周。每2周测量一次收缩压和蛋白尿。在实验期结束时,在进行Sirius-Red和Masson三色染色后,通过组织形态计量学分析评估了肾小球和肾小管间质纤维化。 Ang II增加收缩压(P 0.0001),白蛋白尿(P 0.01)和肾小球和肾小管间质纤维化(P 0.01)。使用激光捕获显微切割术和miRNA芯片分析,该研究表明miR-29a-3p在肾小管中下调而在肾小球中上调。实时聚合酶链反应(PCR)实验在用Ang II处理的大鼠中证实了小管中miR-29a-3p的下调(P 0.01),而肾小球未见明显变化。基质金属蛋白酶2(MMP-2)被鉴定为推定的miR-29a-3p靶标(通过TargetScan,miRanda,Tarbase软件),并通过萤光素酶活性测定功能确认。这些数据表明,Ang II对肾小管中miR-29a-3p表达的作用不同于在肾小球中发挥的作用,并且miR-29a-3p靶向MMP-2。这些结果表明肾小球和肾小管间质水平的肾纤维化的发展取决于不同的分子机制。

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