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西地那非对阿霉素心肌病的保护作用的实验研究

2017-10-20张新莉刚丽张健

中国实用医药 2017年27期

张新莉+刚丽+张健

【摘要】 目的 探讨西地那非对小鼠阿霉素所致心肌病的保护作用及其机制。方法 选取32只雄性10周龄C57BL/6J小鼠, 随机分为阿霉素组(DOX组)与阿霉素加西地那非组(DOX+SIL组), 每组16只。DOX组单一腹腔内注射阿霉素15 mg/kg;DOX+SIL组单一腹腔内注射阿霉素的同时, 给予西地那非10 mg/kg 灌胃。正常饲养2周后计算存活小鼠心室体重比, 并对其进行心脏超声检查;采用酶联免疫吸附试验(ELISA)法检测心肌组织中环磷酸鸟苷(cGMP)的表达情况。结果 2周后DOX组存活16只小鼠, DOX+SIL组存活16只小鼠, DOX组心室体重比、左室舒张末期内径(LVEDD)、左室收缩末期内径(LVESD)、左室射血分数(LVEF)和短轴缩短率(FS)、cGMP分别为(0.41±0.15)%、(3.270±0.260)mm、(2.560±0.097)mm、(47.90±0.01)%、(18.53±1.10)%、(0.051±0.006)mmol/L, 与DOX+SIL组的(0.32±0.05)%、(2.900±0.180)mm、(2.180±0.120)mm、(53.70±0.16)%、(26.50±1.70)%、(0.940±0.006)mmol/L比较差异均具有统计学意义(P<0.05)。结论 西地那非对阿霉素所致心肌病具有保护作用, 可能通过cGMP通路, 明显改善阿霉素诱导的小鼠左心室功能障碍。

【关键词】 阿霉素;心肌病;西地那非;纤维化

DOI:10.14163/j.cnki.11-5547/r.2017.27.118

【Abstract】 Objective To investigate the protective effect of sildenafil on doxorubicin induced cardiomyopathy in mice and its mechanism. Methods A total of 32 male 10 week old C57BL/6J mice were randomly divided into doxorubicin group (DOX group) and doxorubicin and sildenafil group (DOX+SIL group), with 16 mice in each group. DOX group received single intraperitoneal injection of doxorubicin 15 mg/kg, and DOX+SIL group received gavage administration of sildenafil 10 mg/kg, on the basis of intraperitoneal injection of doxorubicin. After 2 weeks of normal feeding, ventricular weight ratio of the surviving mice was calculated and the heart ultrasonic examination was performed. The expression of cyclic guanosine monophosphate (cGMP) in the myocardium was detected by enzyme linked immunosorbent assay (ELISA). Results After 2 weeks, DOX group had survived mice, and DOX+SIL group had survived mice. DOX group had statistically significant difference in ventricular weight ratio, left ventricular end diastolic diameter (LVEDD), left ventricular end systolic diameter (LVESD), left ventricular ejection fraction (LVEF) and fraction shortening (FS) and cGMP respectively as (0.41±0.15)%, (3.270±0.260)mm, (2.560±0.097)mm, (47.90±0.01)%, (18.53±1.10)% and (0.051±0.006)mmol/L, comparing with (0.32±0.05)%, (2.900±0.180) mm, (2.180±0.120) mm, (53.70±0.16)%, (26.50±1.70)% and (0.940±0.006)mmol/L in DOX+SIL group (P<0.05). Conclusion Sildenafil shows protective effect for doxorubicin induced cardiomyopathy, ang it can significantly improve doxorubicin induced left ventricular dysfunction in mice through the cGMP pathway.

【Key words】 Doxorubicin; Cardiomyopathy; Sildenafil; Fibrosis

阿霉素是目前廣泛应用于临床的广谱抗肿瘤药物, 其作用机理为抑制肿瘤细胞核苷酸的生成, 促使肿瘤死亡, 因此阿霉素对于不同生长期的肿瘤细胞均具有抑制作用。临床较多应用于淋巴瘤、乳腺癌、肉瘤等疾病的治疗。虽然化疗药物可以对肿瘤细胞起到杀灭的作用, 但同时对于正常细胞和身体组织脏器也有着一定的副作用[1]。阿霉素的心脏副作用是常见的副反应之一, 其副作用存在积累性和剂量依赖性, 短期副作用轻者可有心电图和轻微的临床症状, 重者可能发生致命性的心力衰竭、心律失常等。经过多年的临床应用显示阿霉素的远期心脏并发症发生率亦较高。该药物副作用机制尚未完全明了, 目前认为其发病机理为自由基形成、线粒体损伤等[2]。……

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