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[Effects of icariin on proliferation of vascular smooth muscle cell induced by ox-LDL via impacting MAPK signaling pathway].
Zhongguo Zhong Yao za Zhi = Zhongguo Zhongyao Zazhi = China Journal of Chinese Materia Medica 2016 October
This paper was aimed to study the effects of icariin (ICA) on the proliferation of vascular smooth muscle cell (VSMC) induced by oxidized low density lipoprotein (ox-LDL), and the molecular mechanism of the expression of proliferating cell nuclear antigen (PCNA) and MAPK signaling pathway. In this study, VSMC was induced by ox-LDL (50 mg•L⁻¹),the effect of ICA on the proliferation of VSMC was detected by MTT assay, Western blot and Real-time PCR. The results showed that after stimulation of ox-LDL, the proliferation activity of VSMC was increased, S phase, G₂/M phase cells were increased, G₀/G₁ phase cells were decreased, PCNA protein expression was enhanced; ICA (40, 20, 10 μmol•L⁻¹) could effectively inhibit ox-LDL-induced VSMC proliferation, S phase and G₂/M phase cells were decreased, the percentage of cells in G₀/G₁ phase were increased, PCNA expression was decreased, p38MAPK and ERK1/2 activation were inhibited. These results indicate that ICA can inhibit the proliferation of VSMC by reducing the expression of PCNA and blocking the p38MAPK and ERK1/2 signaling pathway.
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