NEJM:靶向miR-122,有望用于丙肝治疗(Phase IIa)

2013-04-05 MedSci MedSci原创

    丙型肝炎病毒(HCV)的稳定性和传播依赖于HCV基因组与肝表达的microRNA-122 (miR-122)之间的功能性相互作用。miravirsen是锁定核酸-DNA硫代修饰反义寡核苷酸,靶标是miR-122,它可与miR-122形成高度稳定的杂交双链,从而抑制其功能。     加拿大多伦多胃肠病研究室的HCV RNA

    丙型肝炎病毒(HCV)的稳定性和传播依赖于HCV基因组与肝表达的microRNA-122 (miR-122)之间的功能性相互作用。miravirsen是锁定核酸-DNA硫代修饰反义寡核苷酸,靶标是miR-122,它可与miR-122形成高度稳定的杂交双链,从而抑制其功能。 
    加拿大多伦多胃肠病研究室的HCV RNA博士等人对miravirsen治疗HCV感染的有效性和安全性进行了评估,他们称这种新型治疗方法在功效及安全性结果令人兴奋。研究结果于3月27日在线发表于《新英格兰杂志》上[N Engl J Med. 2013 Mar 27],临床研究注册号NCT01200420。 
    该项2a期研究在7个国际中心展开,研究人员评估了miravirsen用于36例慢性HCV基因1型感染患者的安全性和有效性。患者被随机分组分别接受剂量为3 mg, 5 mg, 7 mg每千克体重的miravirsen皮下注射治疗5周,或安慰剂29天。18周后随访。 
    结果发现,在miravirsen组,平均HCV RNA水平最大值(log10 IU/毫升)从基线起的减少量在3mg/kg的患者组是1.2(P=0.01),5mg/kg组2.9(P=0.003),7mg/kg组为 3(P=0.002),安慰剂组为0.4。在治疗后的随访14周期间,5-mg剂量组没有一个病人检测到HCV RNA,7-mg剂量组有4例。研究人员并未观察到剂量限制性不良事件,且在HCV基因组中的结合位点miR-122没有逃逸突变。 
    作者得出结论,miravirsen治疗慢性HCV基因1型感染患者,在HCV RNA水平上显示出长期剂量依赖性的降低,且没有病毒耐药的证据。

原始文献:

Janssen HL, Reesink HW, Lawitz EJ, Zeuzem S, Rodriguez-Torres M, Patel K, van der Meer AJ, Patick AK, Chen A, Zhou Y, Persson R, King BD, Kauppinen S, Levin AA, Hodges MR.
Treatment of HCV Infection by Targeting MicroRNA. N Engl J Med. 2013 Mar 27. [Epub ahead of print]

PDF文件下载:NEJMoa1209026.pdf

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    2013-07-14 smallant2002
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    2013-04-07 yourmama