PI3K在舒尼替尼致hiPSC-CMs收缩功能障碍中的作用
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篇名: PI3K在舒尼替尼致hiPSC-CMs收缩功能障碍中的作用
TITLE: Role of PI3K in systolic dysfunction of hiPSC-CMs induced by sunitinib
摘要: 目的 研究磷脂酰肌醇-3-激酶(PI3K)在舒尼替尼致心肌收缩功能障碍中的作用。方法以人源诱导型多能干细胞来源的心肌细胞(hiPSC-CMs)为研究对象,以不同浓度[0(对照)、0.5、1、3、5、10μmol/L]舒尼替尼干预hiPSC-CMs24h后,采用Cardio‐Excyte96系统检测细胞收缩力,并计算半数抑制浓度(IC50);检测舒尼替尼(3.14μmol/L)对细胞收缩频率、钙瞬变幅度、钙瞬变恢复时程以及心房钠尿肽(ANP)、脑钠肽(BNP)、β-肌凝蛋白重链(β-MHC)mRNA表达水平的影响;以PI3K的激活剂3,4,5-三磷酸磷脂酰肌醇(PIP3,1μmol/L)和舒尼替尼共同干预hiPSC-CMs,考察PI3K在舒尼替尼致心肌收缩功能障碍中的作用。结果舒尼替尼对hiPSC-CMs收缩力的抑制作用有浓度依赖趋势,IC50值为3.14μmol/L。以3.14μmol/L舒尼替尼干预后,hiPSC-CMs的收缩频率和钙瞬变幅度均显著降低(P<0.05或P<0.01),钙瞬变恢复时程显著延长(P<0.05),ANP、BNP、β-MHCmRNA表达水平均显著升高(P<0.01);PIP3激活PI3K后,hiPSC-CMs收缩力显著升高(P<0.01)。结论激活PI3K活性是改善舒尼替尼致心肌毒性的潜在分子机制。
ABSTRACT: OBJECTIVE To study the role of phosphatidylinositol-3-kinase (PI3K) on sunitinib-induced myocardial systolic dysfunction. METHODS Using human-induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMS) as objects, the contractile force of cardiomyocytes was measured by CardioExcyte 96 system, and IC50 of sunitinib was calculated after hiPSC- CMS were treated with sunitinib at different concentrations [0 (control), 0.5, 1, 3, 5, 10 μmol/L] for 24 hours. The effects of sunitinib (3.14 μmol/L) on the contractile frequency of cardiomyocytes, calcium transient amplitude and calcium transient recovery time course, mRNA expression of myocardial injury markers atrial natriuretic peptide (ANP), brain natriuretic peptide (BNP) and β-myosin heavy chain (β-MHC) were detected. PI3K activator 3,4,5-triphosphate phos-phatidylinositol (PIP3, 1 μmol/L) and sunitinib were used to intervene in hiPSC-CMs jointly, so as to investigate the role of PI3K in the myocardial systolic dysfunction induced by sunitinib. RESULTS Sunitinib inhibited the contractile force of hiPSC-CMs in a concentration-dependent manner. IC50 of sunitinib was 3.14 μmol/L. After intervention with 3.14 μmol/L sunitinib, the contractile frequency of hiPSC-CMs and calcium transient amplitude were decreased significantly (P<0.05 or P<0.01); the duration of calcium transient recovery was prolonged significantly (P<0.05), and mRNA expressions of ANP, BNP and β-MHC were significantly increased (P<0.01). After PI3K was activated with PIP3, the contractile force of hiPSC-CMs was increased significantly (P<0.01). CONCLUSIONS Activating PI3K activity is a potential molecular mechanism to improve myocardial toxicity induced by sunitinib.
期刊: 2023年第34卷第02期
作者: 李从欣;刘国强;刘洋;张之晗;阎伟;梁春慧
AUTHORS: LI Congxin,LIU Guoqiang,LIU Yang,ZHANG Zhihan,YAN Wei,LIANG Chunhui
关键字: 舒尼替尼;收缩功能障碍;心脏毒性;磷脂酰肌醇-3-激酶;人源诱导型多能干细胞来源的心肌细胞
KEYWORDS: sunitinib; systolic dysfunction; cardiotoxicity; phosphatidylinositol-3-kinase; human induced pluripotent stem cell-
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