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首页> 外文期刊>Journal of vascular research >Inhibition of miR-495 Improves Both Vascular Remodeling and Angiogenesis in Pulmonary Hypertension
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Inhibition of miR-495 Improves Both Vascular Remodeling and Angiogenesis in Pulmonary Hypertension

机译:miR-495的抑制改善了肺动脉高压血管重塑和血管生成

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Background and Aims: Pulmonary hypertension (PH) is a chronic progressing vascular disease characterized by pulmonary arteriole remodeling and loss of pulmonary microvasculature. The aim of this study was to investigate a potential role for the miR-495 in PH pathogenesis and to explore its therapeutic potential in PH. Methods: Male C57BL/6J mice were injected with SU5416 weekly during 3 weeks of exposure to 10% oxygen to cause PH. We first tested the effects of adeno-associated virus 9 (AAV9) delivery which was specifically designed to block miR-495 in the lungs of the PH model. Then, the biological function of miR-495 was analyzed in cultured pulmonary arterial endothelial cells (PAECs) under hypoxic condition. Results: The inhibition of miR-495 improves hemodynamics and vascular remodeling in PH. At the same time, these effects were associated with increases in angiogenic transcription factor VEZF1 and marked upregulation of other angiogenic genes such as Angpt-1 and IGF1. In vitro, cultured mouse PAECs were transfected with miR-495 inhibitor or miR-495 mimics. Both the flow cytometry results and CCK8 assay showed that miR-495 inhibitor increased the percentage of cells in the G2/M+S phase, and the wound healing assays indicated that the migration capacity of PAECs transfected with miR-495 inhibitor was increased compared to the inhibitor-NC cells. Conclusions: Our results indicate that AAV9-TuD-miR-495 delivery improves hemodynamic and pulmonary vascular structural changes in PH mice.
机译:背景和目的:肺动脉高压(pH)是一种慢性进展血管疾病,其特征在于肺动脉重塑和肺部微血管损失。本研究的目的是探讨miR-495在pH发病机制中的潜在作用,并探讨其pH值的治疗潜力。方法:在暴露于10%氧气的3周内每周注射雄性C57BL / 6J小鼠,导致pH值。我们首先测试了腺相关病毒9(AAV9)递送的影响,该递送专门设计用于阻断pH模型的肺部的miR-495。然后,在缺氧条件下在培养的肺动脉内皮细胞(PAEC)中分析MIR-495的生物学功能。结果:miR-495的抑制改善了pH中的血流动力学和血管重塑。同时,这些效应与血管生成转录因子VezF1的增加有关,并标记对其他血管生成基因如Angpt-1和IGF1的上调。体外,用miR-495抑制剂或miR-495模拟转染培养的小鼠PAEC。流式细胞术结果和CCK8测定均显示MIR-495抑制剂增加了G2 / M + S相中细胞的百分比,伤口愈合测定表明,与miR-495抑制剂转染的PAEC的迁移能力增加抑制剂-NC细胞。结论:我们的结果表明AAV9-TUD-MIR-495递送改善了pH小鼠的血液动力学和肺血管结构变化。

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