Please use this identifier to cite or link to this item:
標題: Gelsolin (GSN) induces cardiomyocyte hypertrophy and BNP expression via p38 signaling and GATA-4 transcriptional factor activation
作者: Hu, Wei-Syun
Ho, Tsung-Jung
Pai, Peiying
Chung, Li-Chin
Kuo, Chia-Hua
Chang, Sheng-Huang
Tsai, Fuu-Jen
Tsai, Chang-Hai
Jie, Yu-Chi
Liou, Ying-Ming
Huang, Chih-Yang
關鍵字: Cardiomegaly;DNA-Binding Proteins;GATA4 Transcription Factor;Gelsolin;Gene Expression Regulation;Humans;Hypertrophy;Myocytes, Cardiac;Natriuretic Peptide, Brain;Promoter Regions, Genetic;Signal Transduction;Transcriptional Activation;p38 Mitogen-Activated Protein Kinases
Project: Molecular and Cellular Biochemistry, Volume 390, Issue 1-2, Page(s) 263-270.
Cardiomyocyte hypertrophy is an adaptive response of the heart to various types of stress. During the period of stress accumulation, the transition from physiological hypertrophy to pathological hypertrophy results in the promotion of heart failure. Gelsolin (GSN) is a member of the actin-binding proteins, which regulate dynamic actin filament organization by severing and capping. Moreover, GSN also regulates cell morphology, differentiation, movement, and apoptosis. In this study, we used H9c2 and H9c2-GSN stable clones in an attempt to understand the mechanisms of GSN overexpression in cardiomyocytes. These data showed that the overexpression of GSN in H9c2-induced cardiac hypertrophy and increased the pathological hypertrophy markers atrial natriuretic peptide brain natriuretic peptide. Furthermore, we found that E-cadherin expression decreased with the overexpression of GSN in H9c2, but β-catenin expression increased. These data presume that the cytoskeleton is loose. Further, previous studies show that the mitogen-activated protein kinase pathway can induce cardiac hypertrophy. Our data showed that p-p38 expression increased with the overexpression of GSN in H9c2, and the transcription factor p-GATA4 expression also increased, suggesting that the overexpression of GSN in H9c2-induced cardiac hypertrophy seemed to be regulated by the p38/GATA4 pathway. Moreover, we used both the p38 inhibitor (SB203580) and GSN siRNA to confirm our conjecture. We found that both of these factors significantly suppressed gelsolin-induced cardiac hypertrophy through p38/GATA4 signaling pathway. Therefore, we predict that the gene silencing of GSN and/or the downstream blocking of GSN along the p38 pathway could be applied to ameliorate pathological cardiac hypertrophy in the future.
ISSN: 0300-8177
DOI: 10.1007/s11010-014-1977-7
Appears in Collections:生命科學系所

Show full item record

Google ScholarTM




Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.