张华莉

教授 博士生导师 硕士生导师

入职时间:1997-07-09

所在单位:基础医学院

学历:博士研究生毕业

办公地点:湘雅老校区第二教学楼5楼

性别:女

联系方式:15607310187

学位:医学博士学位

在职信息:在职

主要任职:湖南省脓毒症转化医学重点实验室学术委员会副主任,湖南省病理生理学会副理事长,危重病专业委员会副主任委员,中国病理生理学会常务理事

毕业院校:中南大学

学科:基础医学

曾获荣誉:

2013-06-01  当选:  中南大学“升华学者”特聘教授

2013-06-01  当选:  湖南省自然科学杰出青年基金获得者

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Modeling human protein aggregation cardiomyopathy using murine induced pluripotent stem cells.

发布时间:2021-06-02

点击次数:

发表刊物:Stem Cells Transl Med .

摘要:Several mutations in αB-crystallin (CryAB), a heat shock protein with chaperone-like activities, are causally linked to skeletal and cardiac myopathies in humans. To better understand the underlying pathogenic mechanisms, we had previously generated transgenic (TG) mice expressing R120GCryAB, which recapitulated distinguishing features of the myopathic disorder (e.g., protein aggregates, hypertrophic cardiomyopathy). To determine whether induced pluripotent stem cell (iPSC)-derived cardiomyocytes, a new experimental approach for human disease modeling, would be relevant to aggregation-prone disorders, we decided to exploit the existing transgenic mouse model to derive iPSCs from tail tip fibroblasts. Several iPSC lines were generated from TG and non-TG mice and validated for pluripotency. TG iPSC-derived cardiomyocytes contained perinuclear aggregates positive for CryAB staining, whereas CryAB protein accumulated in both detergent-soluble and insoluble fractions. iPSC-derived cardiomyocytes identified by cardiac troponin T staining were significantly larger when expressing R120GCryAB at a high level in comparison with TG low expressor or non-TG cells. Expression of fetal genes such as atrial natriuretic factor, B-type natriuretic peptide, and α-skeletal α-actin, assessed by quantitative reverse transcription-polymerase chain reaction, were increased in TG cardiomyocytes compared with non-TG, indicating the activation of the hypertrophic genetic program in vitro. Our study demonstrates for the first time that differentiation of R120G iPSCs into cardiomyocytes causes protein aggregation and cellular hypertrophy, recapitulating in vitro key pathognomonic hallmarks found in both animal models and patients. Our findings pave the way for further studies exploiting this cell model system for mechanistic and therapeutic investigations.

合写作者:Elisabeth Christians,Qiang Liu,Michael Riedel,Kathryn Ivey,Paul Cheng,Katie Mitzelfelt,Graydon Taylor,Dennis Winge,Deepak Srivastava

第一作者:Pattraranee Limphong,Huali Zhang(第一作者)

论文类型:基础研究

通讯作者:Ivor Benjamin

学科门类:医学

一级学科:基础医学

期号:2013,2(3):161-6.

是否译文:

发表时间:2013-02-19

收录刊物:SCI

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