Cardiac troponin I R193H mutant interacts with HDAC1 to repress phosphodiesterase 4D expression in cardiomyocytes.
Cardiac troponin I R193H mutant interacts with HDAC1 to repress phosphodiesterase 4D expression in cardiomyocytes.
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心肌肌钙蛋白 I R193H 突变体与 HDAC1 相互作用抑制心肌细胞中磷酸二酯酶 4D 表达
DOI:
10.1016/j.gendis.2020.01.004
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发表时间:
2021-07
期刊:
影响因子:
6.8
通讯作者:
Tian J
中科院分区:
文献类型:
--
作者:
Zhao W;Qian Lu;Luo J;Pan B;Liu LJ;Tian J
Cardiac Troponin I (cTnI) is a subunit of the thin filament involved in regulation of heart contraction. Mutated cTnI accounts for most genetic mutations associated with restrictive cardiomyopathy (RCM). We previously found phosphodiesterase 4D (PDE4D) decreased in RCM mice with cTnIR193H mutation and the mutant cTnI might be involved in PDE4D reduction. This study aims to elucidate a novel role of cTnIR193H mutant as a gene regulator. Overexpression of cTnIR193H mutant in cardiomyocytes showed decrease in PDED4D protein expression, while the enrichment of histone deacetylase 1 (HDAC1) was increased along with decreases in acetylated lysine 4 (acH3K4) and 9 (acH3K9) levels in the PDE4D promoter. HDAC1 overexpression could also downregulate PDE4D via reducing acH3K4 and acH3K9 levels. Co-IP assays showed that cTnIR193H mutant owed increased binding ability to HDAC1 compared with wild type cTnI. EGCG as a HDAC1 inhibitor could diminish the strength of cTnIR193H-HDAC1 interactions and alleviate the reduction in PDE4D expression. Together, our data indicated that cTnIR193H mutant could repress PDE4D expression in cardiomyocytes through HDAC1 associated histone deacetylation modification. Unlike the typical function of cTnI in cytoplasm, our study suggested a novel role of cTnI mutants in nuclei in regulating gene expression.
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影响因子:
4
作者:
Liu X;Zhang L;Pacciulli D;Zhao J;Nan C;Shen W;Quan J;Tian J;Huang X
通讯作者:
Huang X
影响因子:
5.3
作者:
Pan B;Quan J;Liu L;Xu Z;Zhu J;Huang X;Tian J
通讯作者:
Tian J
影响因子:
1
作者:
Palka, P;Lange, A;Ward, C
通讯作者:
Ward, C
DOI:
10.3724/sp.j.1263.2011.00168
发表时间:
2011-09
期刊:
Journal of geriatric cardiology : JGC
影响因子:
--
作者:
Jean-Charles PY;Li YJ;Nan CL;Huang XP
通讯作者:
Huang XP
影响因子:
4.8
作者:
Dvornikov, Alexey V.;Smolin, Nikolai;de Tombe, Pieter P.
通讯作者:
de Tombe, Pieter P.