卡维地洛对映体的抗心肌细胞凋亡作用  

Anti-apoptotic effects of carvedilol enantiomers in cardiac myocytes

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作  者:刘晓颖[1] 杨敏[1] 林秋雄[1] 余细勇[1] 单志新[1] 郑猛[1] 林曙光[1] 

机构地区:[1]广东省人民医院医学研究中心广东省心血管病研究所

出  处:《中国临床药理学与治疗学》2006年第9期1035-1038,共4页Chinese Journal of Clinical Pharmacology and Therapeutics

基  金:广东省自然科学基金团队项目(№015015);广东省科技厅攻关项目(№2004B30601009);2003广东省社会发展领域科技计划项目;广东省人民医院院内启动基金项目(№Y02084)

摘  要:目的:研究卡维地洛(carvedilol)R(+)和S(-)型对映体对心肌细胞的凋亡保护作用。方法:异丙肾上腺素(ISO)2 mmol.L-1作用12 h以诱导H9C2-1心肌细胞凋亡,Hoechst 33258染色法定性凋亡细胞,AnnexinⅤ-FITC/PI双染标记细胞后以流式细胞仪测定标记率以定量凋亡率。处理组同时加入R(+)或S(-)carvedilol,分2和10μmol.L-1两个浓度组。并分别测定10μmol.L-1R(+)或S(-)carvedilol单一作用的细胞凋亡率。结果:2 mmol.L-1ISO作用12 h后H9C2-1细胞大量凋亡(P<0.01);R(+)或S(-)carvedilol+ISO组细胞凋亡率显著低于ISO组(P<0.05);与低剂量组间比较,R(+)carvedilol+ISO细胞晚期凋亡率和总凋亡率低于S(-)carvedilol+ISO,差异有显著性意义(P<0.05);高剂量S(-)carvedilol组细胞凋亡率略有升高,但显著低于S(-)Carv 10μmol.L-1+ISO组(P<0.05)。结论:ISO可诱导-H9C2-1心肌细胞凋亡,低剂量R(+)或S(-)carvedilol对此均有明显的抑制作用,并且R(+)和S(-)型carvedilol的抗心肌细胞凋亡效应间存在一定的立体选择性差异,R(+)carvedilol显示出更具潜力。AIM: To investigate the anti-apoptotic effects of R ( + ) and S ( - ) enantiomers of carvedilol in cardiac myocytes. METHODS: H9C2-1 cardiac myocytes were induced to apoptosis by isopropylarterenol (ISO) for 12 h, R( + ) carvedilol or S( - ) carvedilol was added as the treatment with 2 μmol·L^-1 or 10 μmol· L^-1 dose. Apoptotic cells were identified by Hoechst 33258, and for the determination of apoptosis ratio, Annexin V-FITC/ PI double-staining assay was applied with the flow cytometer. The apoptotic effect of 10 μmol R( + ) (carvedilol) or S ( - ) carvedilol alone on cell was also measured. RESULTS: 2 mmol·L^-1 ISO induced a apoptosis in a great quantity of H9C2-1 cells ( P 〈0.01), and R( + ) (carvedilol) or S( - ) carvedilol could decreased the apoptotic ratio markedly (P 〈 0.01). The late stage and total apoptotic ratios of 2 μmol· L^- 1 R ( + ) carvedilol + ISO were lower than those of 2 μmol S ( - ) carvedilol + ISO group ( P 〈 0.05), but there is no significant difference between 10 μmol· L^- 1 group. The apoptotic ratio of 10 μmol· L^- 1 S ( - ) carvedilol itself was a little higher than that of control but was much lower than that of ISO groups (P 〈 0.05). CONCLUSION: Both R ( + ) (carvedilol) and S ( - ) carvedilol can effectively inhibit the apoptosis of H9C2-1 cardiac myoctytes induced by ISO, and there is stereoselective difference in it's anti-apoptotic activity on cardiac myocytes between these two enantiomers. R ( + ) carvedilol is more potential to antagonize the cell apoptosis .

关 键 词:卡维地洛 对映体 抗凋亡 心肌细胞 

分 类 号:R965.2[医药卫生—药理学] R966[医药卫生—药学]

 

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