Necrosis is the dominant form of cell death in various heart diseases,including myocardial infartion. But the molecular mechanism and signal transduction pathways remain mostly elusive. Accumulating data show that necrosis could also be programmed cell death, which is characterized as necroptosis. Researchers start to unvein the involving critical members and regulatory mechanism in necroptosis. cyclophilin D is a vital components in determining mitochondrial pore permeability and necroptosis. Bioinformatics analysis reveals that all miR-30 family members have conserved binding sites of 3'UTR of cyclophilin D.Our previous study showed that miR-30 is downregulated under oxidative stress. This study aims at elucidating whether miR-30 family protects against heart injury by reducing cardiomyocytes necroptosis through targeting cyclophilin D.
坏死是心肌梗死等多种心脏疾病的主要细胞死亡形式,但其分子机制和信号转导途径在很大程度上仍未确定。近年来,研究显示坏死也是由多因素调控的程序性死亡,提示有效地抑制心肌细胞坏死将为防治心脏疾病开辟新的思路。缺血再灌注损伤主要通过增加线粒体内膜通透性引发心肌细胞坏死,其中亲环蛋白D是决定线粒体膜通透性的关键组分,但其具体上下游调控分子及参与的信号通路仍不清楚。通过生物信息学软件分析发现亲环蛋白D为所有miR-30家族成员的预测靶点,提示miR-30家族有可能通过转录后调控亲环蛋白D的表达从而影响线粒体膜通透性,调控心肌细胞坏死。本研究将联合转基因动物及药理学阻断剂,从整体、细胞和分子水平验证我们的假设。我们前期研究结果显示氧应激引起miR-30家族表达水平下调。上调miR-30表达水平很望成为对抗心肌细胞坏死的关键策略。本研究将为把miRNA-30家族开发成为心脏疾病的治疗靶点提供理论和实践依据
坏死是心肌梗死等多种心脏疾病的主要细胞死亡形式,但其分子机制和信号转导途径在很大程度上仍未确定。近年来,研究显示坏死也是由多因素调控的程序性死亡,提示有效地抑制心肌细胞坏死将为防治心脏疾病开辟新的思路。缺血再灌注损伤主要通过增加线粒体内膜通透性引发心肌细胞坏死,其中亲环蛋白D是决定线粒体膜通透性的关键组分,但其具体上下游调控分子及参与的信号通路仍不清楚。通过生物信息学软件分析发现亲环蛋白D为所有miR-30家族成员的预测靶点。我们的研究通过联合转基因动物及药理学阻断剂,从整体、细胞和分子水平验证miR-30家族表达水平下调和亲环蛋白D的表达上调是心肌细胞坏死的关键策略。miR-30家族有可能通过转录后调控亲环蛋白D的表达从而影响线粒体膜通透性,调控心肌细胞坏死。本研究成果为把miRNA-30家族开发成为心脏疾病的治疗靶点提供了理论和实践依据。
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数据更新时间:2023-05-31
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