Lentiviral-mediated p38 MAPK RNAi attenuates aldosterone-induced myocyte apoptosis

Zhou,Yan; Liang,Yuanhong; Wei,Jie; Chen,Jing; Tang,Qizhu

doi:10.3892/mmr.2013.1539

Lentiviral-mediated p38 MAPK RNAi attenuates aldosterone-induced myocyte apoptosis

Authors:
- Yan Zhou
- Yuanhong Liang
- Jie Wei
- Jing Chen
- Qizhu Tang
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Affiliations: Department of Emergency, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China, Department of Cardiology, Guangdong General Hospital, Guangdong Cardiovascular Institute, Guangzhou, Guangdong 510080, P.R. China, Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
Published online on: June 21, 2013 https://doi.org/10.3892/mmr.2013.1539
Pages: 493-498

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Abstract

Aldosterone-induced myocyte apoptosis is an important component of cardiovascular disease. While the p38 mitogen-activated protein kinase (p38 MAPK) pathway has been shown to be crucial in myocyte apoptosis, whether aldosterone induces myocyte apoptosis through this pathway remains unclear. In the present study, three individual strands of p38 MAPK short hairpin RNA (ShRNA), delivered by lentiviral vectors (PGLV), were constructed and used to explore the role of p38 MAPK pathway activation in aldosterone-mediated myocyte apoptosis in cultured myocytes and normotensive rats. Aldosterone stimulation increased myocyte apoptosis, caspase-3 expression levels and p38 MAPK mRNA and protein expression levels in vitro and in vivo. PGLV-ShRNA3 transduction decreased aldosterone-mediated myocyte apoptosis and p38 MAPK mRNA and protein expression levels in vitro (all P<0.01). PGLV-ShRNA3 transduction significantly decreased aldosterone-mediated myocyte apoptosis, p38 MAPK mRNA and protein expression levels in normotensive rats (P<0.01, P<0.01 and P<0.05, respectively). Results from the present study suggest that aldosterone directly induces myocyte apoptosis through the p38 MAPK pathway and the gene silencing of p38 MAPK may protect cardiac myocytes from aldosterone-mediated apoptosis.

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