Research on the effects of ligustrazine phosphate on angiotensin Ⅱ induced hypertrophy of H9c2 cells and its mechanism
LI Chunhong WANG Jie WU Aiming CHEN Huiyang ZHANG Ting MA Zhe GAO Yonghong LOU Lixia▲
Key Laboratory of Chinese Internal Medicine of Ministry of Education and Beijing, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China
Abstract:Objective To investigate the effects of ligustrazine phosphate (ligu) on hypertrophy of H9c2 cells induced by angiotensin Ⅱ (Ang Ⅱ) and its possible mechanism. Methods H9c2 cells hypertrophy induced by Ang Ⅱ was used as a model. The cells were randomly divided into control group, model group, ligustrazine phosphate group, ligustrazine phosphate + NE-100 group and NE-100 group. Rhodamine-Phalloidin staining was used to observe the changes of cell area; Fura-2 AM was used to determine the changes of intracellular Ca2+ concentration; Western blot was used to detect the expression of Sigma-1 receptor (Sig-1R), calcineurin (CaN) and inositol 1, 4, 5-trisphosphate receptor (IP3R). Results Ligustrazine phosphate could inhibit the increase of cell area induced by Ang Ⅱ (P < 0.05), which could be blocked by NE-100, a Sig-1R inhibitor (P < 0.05), and Ligustrazine phosphate could inhibit the increase of BNP mRNA level induced by Ang Ⅱ (P < 0.05). Ang Ⅱ incubation decreased the expression level of Sig-1R protein (P < 0.05), ligustrazine phosphate had a tendency to restore the expression level of Sig-1R protein (P > 0.05); ligustrazine phosphate intervention could significantly reduce the increase of IP3R protein level induced by Ang II (P < 0.05), NE-100 blocked the effect (P < 0.05); but ligustrazine phosphate intervention had no effect on the increase of CaN induced by Ang Ⅱ (P > 0.05). In addition, ligustrazine phosphate inhibited the increase of intracellular Ca2+ in H9c2 cells induced by Ang Ⅱ, which was blocked by NE-100 (P < 0.05). Conclusion Ligustrazine phosphate inhibits cardiomyocyte hypertrophy by interfering with the expression of IP3R through Sig-1R and affecting intracellular calcium balance.
李春红 王婕 吴爱明 陈慧洋 张婷 马喆 高永红 娄利霞▲. 磷酸川芎嗪对血管紧张素 ■ 诱导的H9c2细胞肥大的影响及其机制的研究[J]. 中国医药导报, 2019, 16(14): 4-8.
LI Chunhong WANG Jie WU Aiming CHEN Huiyang ZHANG Ting MA Zhe GAO Yonghong LOU Lixia▲. Research on the effects of ligustrazine phosphate on angiotensin Ⅱ induced hypertrophy of H9c2 cells and its mechanism. 中国医药导报, 2019, 16(14): 4-8.