Association between cardiac troponin I phosphorylation/degradation and cardiomyopathies.
- Author:
Chun-Xia ZHU
1
;
Heng-Fang WU
;
Xiang-Jian CHEN
Author Information
- Publication Type:Journal Article
- MeSH: Adult; Cardiomyopathies; metabolism; pathology; Female; Humans; Male; Middle Aged; Myocardium; metabolism; pathology; Phosphorylation; Protein Kinase C; metabolism; Protein Kinase C beta; Signal Transduction; Troponin I; metabolism
- From: Chinese Journal of Cardiology 2007;35(11):996-999
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo investigate the association between cTnI phosphorylation/degradation and cardiomyopathies in extransplanted myocardium.
METHODScTnI phosphorylation and degradation as well as PKC (beta1, beta2) expressions were determined in extransplanted hearts from patients with cardiomyopathies (n = 8) and from traffic accidents (n = 6) by Western blot.
RESULTSThe cTnI bands were observed in LV myocardium of cardiomyopathy patients and normal myocardium while and cTnI degradation bands were only detected in LV myocardium from patients with cardiomyopathies. The phosphorylated cTnI bands were significantly upregulated in LV myocardium of cardiomyopathy patients compared to normal myocardium (P < 0.05). There was no myocardial PKCbeta1, PKCbeta2 expression in all examined hearts.
CONCLUSIONThe cTnI degradation products and increased phosphorylated cTnI expression are likely involved in the pathogenesis and development of cardiomyopathy.
