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[Aliskiren inhibits proliferation of cardiac fibroblasts in AGT-REN double transgenic hypertensive mice in vitro.] [Article in Chinese]

WANG Li-Ping^*, FAN Su-Jing, LI Shu-Min, WANG Xiao-Jun, SUN Na

Department of Physiology； Tangshan Key Laboratory for Preclinical on Chronic Diseases, School of Basic Medicine, North China University of Science and Technology, Tangshan 063000, China

Abstract

The purpose of the present study is to explore the effect of aliskiren on the proliferation of cardiac fibroblasts (CFs) in AGT-REN double transgenic hypertensive (dTH) mice. The cultured CFs from AGT-REN dTH mice were divided into AGT-REN group (dTH) and aliskiren group (ALIS). Cultured CFs from C57B6 mice were served as control (WT). The effect of different concentration of aliskiren (1 × 10⁻⁶, 1 × 10⁻⁷, 1 × 10⁻⁸, 1 × 10⁻⁹ mol/L) on CFs proliferation was determined by MTT assay. After treatment with 1 × 10⁻⁷ mol/L aliskiren for 24 h, α-SMA, collagen I, III and NADPH oxidase (NOX) protein expression in CFs of AGT-REN dTH mice were detected by Western blot. The collagen synthesis in CFs was assessed by hydroxyproline kit. The expression of ROS was determined by DHE. Results showed that the blood pressure and plasma Ang II levels were significantly increased and CFs proliferation was significantly increased as well in AGT-REN dTH mice compared with WT group. However, aliskiren intervention decreased CFs proliferation, myofibroblast transformation, as well as the collagen I and III synthesis in CFs of AGT-REN dTH mice. Meanwhile, aliskiren inhibited ROS content and NOX2/NOX4 protein expression in CFs of AGT-REN dTH mice. These results suggest that aliskiren decreases the cell proliferation, myofibroblast transformation and collagen production in CFs of AGT-REN dTH mice, which might be through inhibition of oxidative stress response.

Key words: aliskiren; cardiac fibroblast; oxidative stress; myocardial fibrosis

Received: 2016-01-05　　Accepted: 2016-06-29

Corresponding author: 王丽萍　　E-mail: mywlpzjm@163.com

Citing This Article：

WANG Li-Ping, FAN Su-Jing, LI Shu-Min, WANG Xiao-Jun, SUN Na. [Aliskiren inhibits proliferation of cardiac fibroblasts in AGT-REN double transgenic hypertensive mice in vitro.] [Article in Chinese]. Acta Physiol Sin 2016; 68 (5): 684-690 (in Chinese with English abstract).