DMD carrier model with mosaic dystrophin expression in the heart reveals complex vulnerability to myocardial injury.
DMD carrier model with mosaic dystrophin expression in the heart reveals complex vulnerability to myocardial injury.
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心脏中表达马赛克抗肌营养不良蛋白的 DMD 携带者模型揭示了心肌损伤的复杂脆弱性。
DOI:
10.1093/hmg/ddaa015
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发表时间:
2020
影响因子:
3.5
通讯作者:
Townsend,DeWayne
中科院分区:
文献类型:
--
作者:
Meyers,TatyanaA;Heitzman,JackieA;Townsend,DeWayne
Duchenne muscular dystrophy (DMD) is a devastating neuromuscular disease that causes progressive muscle wasting and cardiomyopathy. This X-linked disease results from mutations of the DMD allele on the X-chromosome resulting in the loss of expression of the protein dystrophin. Dystrophin loss causes cellular dysfunction that drives the loss of healthy skeletal muscle and cardiomyocytes. As gene therapy strategies strive toward dystrophin restoration through micro-dystrophin delivery or exon skipping, preclinical models have shown that incomplete restoration in the heart results in heterogeneous dystrophin expression throughout the myocardium. This outcome prompts the question of how much dystrophin restoration is sufficient to rescue the heart from DMD-related pathology. Female DMD carrier hearts can shed light on this question, due to their mosaic cardiac dystrophin expression resulting from random X-inactivation. In this work, a dystrophinopathy carrier mouse model was derived by breeding male or female dystrophin-null mdx mice with a wild type mate. We report that these carrier hearts are significantly susceptible to injury induced by one or multiple high doses of isoproterenol, despite expressing ~57% dystrophin. Importantly, only carrier mice with dystrophic mothers showed mortality after isoproterenol. These findings indicate that dystrophin restoration in approximately half of the heart still allows for marked vulnerability to injury. Additionally, the discovery of divergent stress-induced mortality based on parental origin in mice with equivalent dystrophin expression underscores the need for better understanding of the epigenetic, developmental, and even environmental factors that may modulate vulnerability in the dystrophic heart.
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影响因子:
5.1
作者:
Wu, B.;Lu, P.;Lu, Q. L.
通讯作者:
Lu, Q. L.
影响因子:
5
作者:
Strakova,Jana;Dean,JonD;Sharpe,KatharineM;Meyers,TatyanaA;Odom,GuyL;Townsend,DeWayne
通讯作者:
Townsend,DeWayne
影响因子:
3.5
作者:
F. Muntoni;A. Mateddu;M. Marrosu;M. Cau;R. Congiu;M. Melis;A. Cao;C. Cianchetti
通讯作者:
C. Cianchetti
影响因子:
3.1
作者:
Justin B. Jin;John C. Carter;Daniel W. Sheehan;D. Birnkrant
通讯作者:
D. Birnkrant
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
M. Schoeffler;F. Wallet;M. Robert;G. Tramoni;S. Workineh;J. Viale;S. Duperret
通讯作者:
S. Duperret