Expression and redistribution of β-catenin in the cardiac myocytes of left ventricle of spontaneously hypertensive rat.

Qiaoli Zheng, Ping Chen, Zeqing Xu, Faqian Li, Xian Ping Yi

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Beta-catenin is not only an adhering junction protein, but also the central player of the canonical Wnt signalling pathway. In order to investigate the roles of β-catenin in the mechanism of myocardial hypertrophy, we determined the expression and distribution of β-catenin in the cardiomyocytes of spontaneously hypertensive heart failure (SHHF) rats and age-matched Wistar-Kyoto (WKY) rats. We identified the reducing of β-catenin expression in the membrane protein fraction but increasing in the nuclear protein in the 6 and 12 month-old SHHF rats as compared with the age-matched WKY rats by Western blotting. Immunolabeling of β-catenin colocalized with cadherin at the intercalated disc sites and showed nuclear accumulation in myocytes of SHHF rats. We also revealed that the association between glycogen synthase kinase-3β and β-catenin had weakened in the 6 month-old SHHF rats as compared with the age-matched WKY rats by immunoprecipitation. These findings suggested that nuclear translocation of β-catenin might play important roles in regulating signal transduction in the decompensated hypertrophy stage.

Original languageEnglish (US)
Pages (from-to)565-573
Number of pages9
JournalJournal of molecular histology
Volume44
Issue number5
DOIs
StatePublished - Oct 2013

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