AHA2012年会:心肌干细胞输注促进梗死心肌再生

2012-11-12 欧柏青 医学论坛网

     在11月6日的美国心脏学会(AHA)2012科学年会上,美国一项有关干细胞输注治疗缺血性心肌病的试验(SCIPIO)引人注目,该试验研究了心肌干细胞(CSCs)而不是骨髓干细胞对心力衰竭患者的益处,而且初步结果令人振奋。   SCIPIO是一个随机开放标签的1期临床试验,研究对象为心肌梗死后左室射血分数(LVEF)<40%的心衰患者,使用c-KIT-阳性CSCs。细胞来源于患者

  心脏

  在11月6日的美国心脏学会(AHA2012科学年会上,美国一项有关干细胞输注治疗缺血性心肌病的试验(SCIPIO)引人注目,该试验研究了心肌干细胞(CSCs)而不是骨髓干细胞对心力衰竭患者的益处,而且初步结果令人振奋。

  SCIPIO是一个随机开放标签的1期临床试验,研究对象为心肌梗死后左室射血分数(LVEF)<40%的心衰患者,使用c-KIT-阳性CSCs。细胞来源于患者右心耳,分离扩增然后在冠状动脉旁路移植术(CABG)时注入心梗部位。

  术后4个月利用超声心动图进行随访发现,CSCs注射组18例患者的LVEF从术前29%增加到36%((p <0.001)。对照组13例患者的LVEF手术前后无明显变化(29.2% vs 29.4%)。

  术后1年期及2年期随访CSCs注射组的获益依然存在。与基线相比,对照组12例一年期随访与基线相比LVEF变化不大(30.3% vs 31.7%),而17例CSCs治疗组的LVEF从基线29.7%增加到37.8%。术后2年随访,5例对照组的LVEF仍无显著改善,但12例CSCs治疗组LVEF增至41.7%。在整体室壁运动评分方面,对照组轻微下降,但治疗组从-2.5增加到-3.92(p=0.006)。

  心脏磁共振检查(MRI)显示,CSCs治疗组非存活心肌区域显著改善,梗死区域存活心肌比率增加。Minnesota心衰评分在CSCs治疗组也显著改善,而对照组无变化。两年研究期间未发现CSCs治疗的副作用。

  研究者认为,还需做大规模多中心随机双盲的2期和3期研究来确认结果,并认为CSCs治疗的优点是适用于任何心衰患者,因为通过一个门诊的经皮活检手术就可以得到所需的细胞。他们正计划进行一个多中心的为期2年的2期临床试验,将纳入至少100名患者。

  同时在此次AHA科学年会上报告的其他有关利用干细胞修复梗死心肌的研究结果并不十分理想。

 

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