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MicroRNA therapy stimulates uncontrolled cardiac repair after myocardial infarction in pigs

机译:microRNA治疗刺激心肌梗死后的不受控制的心脏修复

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摘要

Prompt coronary catheterization and revascularization have markedly improved the outcomes of myocardial infarction, but have also resulted in a growing number of surviving patients with permanent structural damage of the heart, which frequently leads to heart failure. There is an unmet clinical need for treatments for this condition(1), particularly given the inability of cardiomyocytes to replicate and thereby regenerate the lost contractile tissue(2). Here we show that expression of human microRNA-199a in infarcted pig hearts can stimulate cardiac repair. One month after myocardial infarction and delivery of this microRNA through an adeno-associated viral vector, treated animals showed marked improvements in both global and regional contractility, increased muscle mass and reduced scar size. These functional and morphological findings correlated with cardiomyocyte de-differentiation and proliferation. However, subsequent persistent and uncontrolled expression of the microRNA resulted in sudden arrhythmic death of most of the treated pigs. Such events were concurrent with myocardial infiltration of proliferating cells displaying a poorly differentiated myoblastic phenotype. These results show that achieving cardiac repair through the stimulation of endogenous cardiomyocyte proliferation is attainable in large mammals, however dosage of this therapy needs to be tightly controlled.
机译:促使冠状动脉导管插入和血运重建显着改善了心肌梗死的结果,但也导致了越来越多的幸存患者,心脏的永久性结构损伤,经常导致心力衰竭。对该条件(1)的治疗有未满足的临床需要,特别是给予心肌细胞的无法复制,从而再生丢失的收缩组织(2)。在这里,我们表明人类microRNA-199A在梗死的猪心中的表达可以刺激心脏修复。在心肌梗死和通过腺相关病毒载体递送这种微小血管的一个月后,治疗的动物显示出全球和区域收缩性,增加肌肉质量和减少瘢痕尺寸的显着改善。这些功能和形态学发现与心肌细胞解离和增殖相关。然而,微小RORNA的随后持续和不受控制的表达导致大多数治疗猪的心律失常死亡。这些事件同时,具有显示出差异化的肌细胞表型的增殖细胞的心肌浸润。这些结果表明,在大型哺乳动物中可实现通过刺激内源性心肌细胞增殖的刺激实现心脏修复,但需要紧密控制这种治疗的剂量。

著录项

  • 来源
    《Nature》 |2019年第7756期|418-422|共5页
  • 作者单位

    Scuola Super Sant Anna Inst Life Sci Pisa Italy;

    Int Ctr Genet Engn & Biotechnol Mol Med Lab Trieste Italy;

    Fdn Toscana Gabriele Monasterio Pisa Italy;

    Scuola Super Sant Anna Inst Life Sci Pisa Italy;

    Int Ctr Genet Engn & Biotechnol Mol Med Lab Trieste Italy;

    Int Ctr Genet Engn & Biotechnol Mol Med Lab Trieste Italy|Kings Coll London Sch Cardiovasc Med & Sci British Heart Fdn Ctr London England;

    Int Ctr Genet Engn & Biotechnol Mol Med Lab Trieste Italy|Kings Coll London Sch Cardiovasc Med & Sci British Heart Fdn Ctr London England;

    Int Ctr Genet Engn & Biotechnol Mol Med Lab Trieste Italy|Kings Coll London Sch Cardiovasc Med & Sci British Heart Fdn Ctr London England;

    Scuola Super Sant Anna Inst Life Sci Pisa Italy;

    Scuola Super Sant Anna Inst Life Sci Pisa Italy;

    Fdn Toscana Gabriele Monasterio Pisa Italy;

    Int Ctr Genet Engn & Biotechnol Mol Med Lab Trieste Italy|Univ Trieste Dept Med Surg & Hlth Sci Trieste Italy;

    Univ Trieste Dept Med Surg & Hlth Sci Trieste Italy;

    Univ Trieste Dept Med Surg & Hlth Sci Trieste Italy;

    Fdn Toscana Gabriele Monasterio Pisa Italy;

    Univ Trieste Dept Med Surg & Hlth Sci Trieste Italy|Int Ctr Genet Engn & Biotechnol Cardiovasc Biol Lab Trieste Italy;

    Univ Trieste Dept Med Surg & Hlth Sci Trieste Italy;

    Scuola Super Sant Anna Inst Life Sci Pisa Italy|Fdn Toscana Gabriele Monasterio Pisa Italy|Temple Univ Lewis Katz Sch Med Cardiovasc Res Ctr Philadelphia PA 19122 USA;

    Int Ctr Genet Engn & Biotechnol Mol Med Lab Trieste Italy|Kings Coll London Sch Cardiovasc Med & Sci British Heart Fdn Ctr London England|Univ Trieste Dept Med Surg & Hlth Sci Trieste Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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