JAMA Neurol:揭示ABCB1基因多态性影响氯吡格雷疗效

2019-04-10 不详 天坛医院

近期,北京天坛医院王拥军教授团队在《JAMA Neurology》发表题为"Association Between ABCB1 Polymorphisms and Outcomes of Clopidogrel Treatment in Patients With Minor Stroke or Transient Ischemic Attack Secondary Analysis of a R

近期,北京天坛医院王拥军教授团队在《JAMA Neurology》发表题为"Association Between ABCB1 Polymorphisms and Outcomes of Clopidogrel Treatment in Patients With Minor Stroke or Transient Ischemic Attack Secondary Analysis of a Randomized Clinical Trial"的论文。研究团队发现ABCB1基因多态性会影响轻型卒中或短暂性脑缺血发作(TIA)患者氯吡格雷的疗效。

轻型卒中和TIA患者早期复发风险较高,及时有效的二级预防治疗有助于控制卒中的复发。由于氯吡格雷可抑制血小板聚集,能有效降低卒中复发的风险,是卒中二级预防中常用的药物之一。然而,由于个体差异的存在,部分患者存在氯吡格雷抵抗现象,卒中复发风险率并没有降低。研究团队在前期研究发现CYP2C19基因多态性会影响氯吡格雷治疗的疗效,氯吡格雷在携带CYP2C19功能缺失等位基因的患者中疗效下降(JAMA.2016;316(1):70-8)。但是否只有这一种基因会影响氯吡格雷的疗效呢?调节氯吡格雷肠道吸收的基因,如编码p-糖蛋白多耐药转运蛋白-1的ABCB1基因的多态性对氯吡格雷临床疗效是否有影响呢?目前这方面的研究较少,结论也各不相同。

为此,研究团队在前期CYP2C19基因的研究基础上,开展了ABCB1基因多态性与氯吡格雷临床疗效的相关研究。研究团队从已经建立的CHANCE研究队列中,选取了血样亚组3010例轻型卒中或TIA患者,以检测ABCB1基因多态性与吡格雷-阿司匹林双抗治疗疗效的关系。研究结果显示,与单用阿司匹林治疗相比,氯吡格雷与阿司匹林联合治疗可显着降低ABCB1-154 TT且3435 CC基因型患者卒中复发的风险,但不能降低ABCB1-154 TC/CC或3435 CT/TT基因型患者卒中复发的风险,说明ABCB1基因多态性对氯吡格雷的疗效是有影响的。研究团队还发现,ABCB1基因与CYP2C19基因多态性对氯吡格雷疗效具有联合影响,即同时携带有CYP2C19功能缺失基因位点与ABCB1-154 TC/CC或3435 CT/TT基因位点的患者,氯吡格雷疗效进一步降低。

该研究结果提示,对于卒中或TIA患者,在临床应用氯吡格雷时,除了CYP2C19基因多态性,应同时考虑ABCB1基因多态性的影响。该项研究将为今后开展以基因信息为基础的个体化治疗提供理论基础与数据支持。

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    2019-11-09 yinhl1978
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    2019-04-12 xzw120
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    2019-04-10 内科新手

    谢谢梅斯提供这么好的信息,学到很多

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