相关实验视频

Updated: Aug 17, 2025

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

直接重编程改善了慢性心肌梗塞中的心脏功能和逆转纤维化

Hidenori Tani¹, Taketaro Sadahiro², Yu Yamada²

¹Department of Cardiology, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan (H.T., H.Y., K.F.).

|December 12, 2022

概括

在慢性心肌梗塞 (MI) 模型中,使用Mef2c/Gata4/Tbx5/Hand2 (MGTH) 的心脏重编成功地再生了心脏组织并减少了纤维化. 这种方法为心力衰竭提供了新的治疗潜力.

科学领域:

心血管生物学
复原医学
分子心脏病学

背景情况:

成人心肌细胞具有有限的再生能力,导致心肌梗塞 (MI) 后的纤维化和心力衰竭.
现有的慢性心脏病发作和纤维化治疗方法不足以促进心肌再生.

研究的目的:

调查活体心脏纤维细胞 (CFs) 转化为诱导心肌细胞 (iCMs) 的心脏重编程,以修复慢性心脏病发作.
在慢性心脏病发作模型中通过纤维细胞重编程阐明心脏修复的机制.

主要方法:

开发一种新的转基因小鼠系统 (Tcf21^iCre/reporter/MGTH2A) 用于诱导心脏重编程和血统追踪.
使用微阵列和单细胞RNA测序等技术评估急性和慢性MI模型中的体内重编程疗效和机制.

主要成果:

在慢性心脏病发作中,心脏重编程将约2%的CF转化为ICM,显著改善心肌收缩并减少纤维化.
MGTH过度表达激活了心脏基因程序,抑制了纤维细胞和炎症特征,并将益纤维细胞转移到抗纤维细胞状态.
心脏重编程抑制了纤维细胞激活的关键调节剂Meox1, 导致了抗纤维细胞作用.

结论:

通过促进心肌再生和缓解纤维化,体内心脏重编程可以有效地修复慢性心脏病.
这些发现突显了心脏重编程作为慢性心力衰竭的新疗法.

关键词:

纤维细胞心脏衰竭肌细胞,心脏进行再生

更多相关视频

Assessing Cardiac Reprogramming using High Content Imaging Analysis

Assessing Cardiac Reprogramming using High Content Imaging Analysis

Published on: October 26, 2020

In vitro Assessment of Cardiac Reprogramming by Measuring Cardiac Specific Calcium Flux with a GCaMP3 Reporter

In vitro Assessment of Cardiac Reprogramming by Measuring Cardiac Specific Calcium Flux with a GCaMP3 Reporter

Published on: February 22, 2022

相关概念视频

Myocarditis I: Introduction

Myocarditis I: Introduction

Myocarditis is inflammation of the myocardium, which is the muscular layer of the heart.EtiologyMyocarditis has a diverse etiology, including a wide range of infectious and non-infectious causes:Infectious CausesViral: Common viruses include Coxsackie A and B, adenovirus, parvovirus B19, enteroviruses, and influenza A.Bacterial: Examples include infections caused by Streptococcus, Staphylococcus, and Mycoplasma species.Rickettsial: Infections like Rocky Mountain spotted fever can result in...

Cardiomyopathy II: Dilated Cardiomyopathy

Cardiomyopathy II: Dilated Cardiomyopathy

Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...

Heart Failure Drugs: Inhibitors of Renin-Angiotensin System

Heart Failure Drugs: Inhibitors of Renin-Angiotensin System

The activation of the sympathetic nervous system and the renin-angiotensin-aldosterone system (RAAS) contributes to cardiac remodeling, and inhibiting the RAAS is a pharmacological target in heart failure management. As a result, neurohumoral modulation is a crucial treatment principle for managing heart failure. This approach involves using medications like ACE inhibitors (ACEIs), angiotensin receptor blockers (ARBs), β-blockers, mineralocorticoid receptor antagonists (MRAs), and neutral...