NEJM:Bococizumab治疗导致的降脂可变性和抗药抗体的形成

2017-03-19 xing.T MedSci原创

在6个评价bococizumab的多国试验中,在相当大比例的患者出现抗药抗体,并且可以显著减弱降低LDL胆固醇水平。在没有抗药抗体的患者中也可以观察到胆固醇水平相对减少的较大可变性。

Bococizumab,一种靶向前蛋白转化酶枯草溶菌素9(PCSK9)的人源化单克隆抗体,可以降低低密度脂蛋白胆固醇(LDL)水平。然而,这种效应的可变性和持久性尚不确定,近日,顶级医学期刊NEJM上针对这一问题发表了一篇研究文章。

研究人员进行了六个平行的、跨国降脂试验,招募了4300例高脂血症患者,将其随机分配,分别接受150mg的bococizumab或安慰剂皮下注射,每2周一次,并随访12个月;96%的患者在招募之时接受他汀类药物治疗。研究人员评估了患者的血脂水平随着时间的变化情况,在治疗期间根据抗药抗体的存在或缺乏进行分层。

在治疗12周后,接受bococizumab治疗的患者LDL胆固醇含量从基线水平降低了54.2%,相比于那些增加了1%的接受安慰剂治疗的患者(组间绝对值差异为−55.2个百分点)。组间总胆固醇、非高密度脂蛋白胆固醇、载脂蛋白B、脂蛋白(a)的差异也具有显著的统计学意义(所有P<0.001)。然而,在接受bococizumab治疗的患者中有相当比例的患者出现高滴度的抗药抗体,其明显减弱了降低低密度脂蛋白胆固醇水平的幅度和持久性。此外,在无抗药抗体的患者中,在治疗12周和52周,LDL胆固醇水平的降低有很大的可变性。接受bococizumab治疗的患者中有57例(2.5%)患者发生主要血管事件,而接受安慰剂治疗的患者中有55例(2.7%)(风险比为0.96;95%可信区间为0.66-1.39;P=0.83)。接受bococizumab治疗的患者最常见的不良反应是注射部位反应(12.7例每100人年)。

在6个评价bococizumab的多国试验中,在相当大比例的患者出现抗药抗体,并且可以显著减弱降低LDL胆固醇水平。在没有抗药抗体的患者中也可以观察到胆固醇水平相对减少的较大可变性。

原始出处:

Paul M Ridker, et al. Lipid-Reduction Variability and Antidrug-Antibody Formation with Bococizumab. N Engl J Med 2017;http://www.nejm.org/doi/full/10.1056/NEJMoa1614062

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    2017-12-10 snf701207
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    2017-03-21 huangdf
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    2017-03-19 1e0e5697m83(暂无匿称)

    jenhao

    0

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    2017-03-19 o9887

    挺好的,学习了

    0