相关实验视频

Updated: May 3, 2026

Suppression of Pro-fibrotic Signaling Potentiates Factor-mediated Reprogramming of Mouse Embryonic Fibroblasts into Induced Cardiomyocytes

Suppression of Pro-fibrotic Signaling Potentiates Factor-mediated Reprogramming of Mouse Embryonic Fibroblasts into Induced Cardiomyocytes

Published on: June 3, 2018

在心肌梗塞后延迟使用miR-199a 排除了亲再生效应

Gia Burjanadze¹, Nikoloz Gorgodze², Giovanni Donato Aquaro³

¹Interdisciplinary Research Center "Health Science," Scuola Superiore Sant'Anna, Pisa, Italy.

JACC. Basic to translational science

|April 8, 2025

概括

在心肌梗塞 (MI) 后通过腺相关病毒血清型6 (AAV6) 延迟服用miR-199a并没有改善心脏功能,并导致死亡率增加. 早期分娩对于潜在的治疗益处至关重要.

科学领域:

心血管研究研究心血管研究
基因治疗基因治疗
分子心脏病学分子心脏病学

背景情况:

微RNA-199a (miR-199a) 显示出心脏修复潜力,当在肌肉梗塞 (MI) 后早期使用腺相关病毒血清型6 (AAV6) 输送时.
推迟施用MI后miR-199a的疗效和安全性仍未得到充分研究.

研究的目的:

为了调查miR-199a的治疗效果是否在MI后1周或2周服用时保持.
在猪模型中评估延迟AAV6-miR-199a分娩对心脏功能和存活率的影响.

主要方法:

猪经历了诱导心肌梗塞 (MI).
携带miR-199a (AAV6-miR-199a) 或对照载体 (AAV6) 的腺相关病毒血清型6在MI后1或2周内被给予.
评估了心脏功能,痕质量和生存率.

主要成果:

在AAV6-miR-199a和AAV6-对照组之间没有观察到痕质量或心脏收缩性能的显著差异.
在用AAV6-miR-199a治疗的猪中,由于突然死亡而导致的死亡率显著增加,发生在载体管理后40至52天.
通过AAV6延迟服用miR-199a并没有产生治疗效益和增加死亡率.

结论:

使用AAV6推迟使用miR-199a的治疗效果不佳,并且在MI后的猪模型中与死亡率的增加有关.
对于临床转换,早期使用miR-199a是强制性的.
应探索其他输送方式,避免病毒载体的永久表达,以便在MI后安全有效的miR-199a治疗.

关键词:

基因治疗的基因疗法心灵的心灵心灵的心灵心灵的心灵心脏病发作心脏病发作磁共振是一种磁共振.这是一个微型RNA.

更多相关视频

Delayed Intramyocardial Delivery of Stem Cells after Ischemia Reperfusion Injury in a Murine Model

Delayed Intramyocardial Delivery of Stem Cells after Ischemia Reperfusion Injury in a Murine Model

Published on: September 3, 2020

Post-Myocardial Infarction Heart Failure in Closed-chest Coronary Occlusion/Reperfusion Model in Göttingen Minipigs and Landrace Pigs

Post-Myocardial Infarction Heart Failure in Closed-chest Coronary Occlusion/Reperfusion Model in Göttingen Minipigs and Landrace Pigs

Published on: April 17, 2021

相关概念视频

MicroRNAs

MicroRNAs

MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After...

MicroRNAs

MicroRNAs

MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...