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郭艺芳:PCSK9单克隆抗体能否撼动他汀霸主地位?

2014-04-03 河北省人们医院 郭艺芳 郭艺芳心血管

近期 ACC大会上先后公布的多项临床试验(LAPLACE-2, DESCARTES, MENDEL-2, RUTHERFORD-2, GAUSS-2等)初步论证了PCSK9抑制剂的降胆固醇作用,结果表明此类药物降低LDL-C的幅度可髙达50%以上。这一降幅相当于大中剂量的强效他汀。 与此同时,现有研究也显示此类药物具有良好的安全性与耐受性。至此,PCSK9抑制剂已经具备了作为优秀降胆固醇药物

近期 ACC大会上先后公布的多项临床试验(LAPLACE-2, DESCARTES, MENDEL-2, RUTHERFORD-2, GAUSS-2等)初步论证了PCSK9抑制剂的降胆固醇作用,结果表明此类药物降低LDL-C的幅度可髙达50%以上。这一降幅相当于大中剂量的强效他汀。

与此同时,现有研究也显示此类药物具有良好的安全性与耐受性。至此,PCSK9抑制剂已经具备了作为优秀降胆固醇药物的基本条件。然而,在血脂异常干预以及心血管疾病的防治中,LDL-C的降低只能作为一个替代终点。降胆固醇治疗的目的并不在于降低胆固醇本身,其最终目的是减少不良心血管事件的发生。因此,仅具有理想的降胆固醇效果和安全性耐受性仍不足以成为优秀的降脂药物,更不能撼动他汀的霸主地位。

目前最值得期待的是关于此类药物的临床终点试验。FOURIER研究可能将成为第一项针对PCSK9抑制剂的临床终点试验。该研究采用双盲、多中心、随机化、安慰剂对照设计,旨在探讨确诊心血管病的患者在他汀治疗基础上加用Evolocumab(AMG 145)治疗的有效性与安全性。其主要终点为首次发生心血管死亡、心肌梗死、因不稳定性心绞痛住院、卒中或冠状动脉血运重建的时间。样本规模将超过20000例,随访时间5年。

本研究已于2013年1月份启动,预期将于2018年2月份结束。若本研究结果证实通过联合应用PCSK9抑制剂与他汀可以较单用他汀进一步降低心血管终点事件的发生率,将会为此类药物的临床广泛应用奠定扎实的基础,他汀类药物一枝独秀的局面将会受到巨大冲击。

预期将于今年结束的关于依折麦布的IMPROVE IT研究也同样值得期待。FOURIER研究与IMPROVE IT研究结果将会论证他汀治疗获益的根本机制,回答降胆固醇是硬道理还是他汀治疗是硬道理,回答他汀治疗的获益是通过降胆固醇实现的还是他汀类药物所固有的其他机制(即所谓的多效性)实现的。

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    2014-12-17 FukaiBao
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    2015-02-09 aids221
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    2014-08-26 Tamikia
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    2014-11-12 liubm568

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