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FDA批准罗氏A型血友病重磅药Hemlibra获批

2018-10-06 MedSci MedSci原创

罗氏(Roche)集团日前宣布,FDA批准其治疗A型血友病的重磅药Hemlibra(emicizumab-kxwh),作为日常预防性疗法,治疗体内不含因子VIII抑制物的A型血友病患者,为患者预防或减轻频繁出血状况。Hemlibra是目前唯一一款面向体内含有或不含因子VIII抑制物的A型血友病患者,且让患者可以每周、每两周或每四周一次接受皮下注射的预防性疗法。A型血友病是一种严重的遗传病。健康人发

罗氏(Roche)集团日前宣布,FDA批准其治疗A型血友病的重磅药Hemlibra(emicizumab-kxwh),作为日常预防性疗法,治疗体内不含因子VIII抑制物的A型血友病患者,为患者预防或减轻频繁出血状况。Hemlibra是目前唯一一款面向体内含有或不含因子VIII抑制物的A型血友病患者,且让患者可以每周、每两周或每四周一次接受皮下注射的预防性疗法。此前已在英国获批:罗氏公司的emicizumab在英国提前获批

A型血友病是一种严重的遗传病。健康人发生出血时,一种叫做因子VIII的凝血蛋白会将因子IXa和因子X聚集在一起,引发凝血过程,进而帮助止血。然而A型血友病患者由于缺乏因子VIII,使得血液不能正常凝固,导致不受控的自发性出血。全球约有32万名A型血友病患者,其中50-60%病情严重。A型血友病患者可能会经常出血,尤其是在关节或肌肉中,引起疼痛、慢性肿胀、畸形、行动不便和长期关节损伤等严重健康问题。在A型血友病替代疗法治疗过程中,可能会发生的一个严重并发症是患者体内会产生因子VIII抑制物。它是由机体免疫系统产生的抗体,能够结合并阻断替代因子VIII,使它很难甚至无法达到可以控制出血的水平。因此,A型血友病患者们急需一款安全有效的疗法来帮助他们降低疾病带来的危险。

Hemlibra是一款双特异性因子IXa和因子X抗体,它可以将激活天然凝血级联所需的因子IXa和因子X聚集在一起,帮助A型血友病患者恢复凝血功能。Hemlibra是一种预防性皮下注射疗法,由罗氏旗下的日本中外制药株式会社(Chugai Pharamceutical)发现,并由Chugai、罗氏和基因泰克(Genentech)共同开发。Hemlibra于去年11月获得针对体内含有因子VIII抑制物的成人及儿童A型血友病患者的常规预防疗法批准。该药还获得了治疗体内不含VIII因子抑制物的A型血友病的突破性疗法认定和优先审评资格。

本次批准是基于3期试验HAVEN 3及HAVEN 4的积极试验结果。在3期试验HAVEN 3中,共71名12岁以上的青少年和成人A型血友病患者分为两组,一组每周一次接受Hemlibra预防疗法(n=36),另一组每两周接受一次治疗(n=35)。两组需要治疗的出血情况分别降低了96%(95% CI: 92.5; 98.0, p<0.0001)和97%(95% CI: 93.4; 98.3, p<0.0001),且对比无预防治疗组(n=18)在出血相关的各项终点均显示出了显著降低的结果,安全性亦为良好。除此之外,Hemlibra在一项针对之前接受过因子VIII传统标准疗法的患者转而接受Hemlibra预防疗法的试验中(n=48),获得了出血情况降低了68%(95% CI: 48.6; 80.5, p<0.0001)的良好结果。在单臂3期试验HAVEN 4中,共41名A型血友病患者接受了每四周一次的预防治疗,其中在含有(n=5)和不含(n=36)因子VIII抑制剂的患者身上均显示出了良好的具有临床意义的出血控制结果,且安全性良好。

“许多针对体内不含因子VIII抑制物的A型血友病预防性疗法都需要患者每周进行好几次注射。即使注射过了,患者还是会出现出血情况,因此,他们急需新的疗法来改善生活治疗,”密歇根儿童医院血液学专家Michael Callaghan博士说:“Hemlibra对于整个A型血友病患者群体来说是一款意义重大的新药,也是近20年来第一次获得突破的新型药物。Hemlibra可以减少出血情况,并使患者仅需每周、每两周或每四周进行一次注射即可。”

“本次Hemlibra获得批准证明了我们的突破性科学及新药研发取得的成果有望重新定义‘标准疗法’,”罗氏首席医学官兼全球产品开发负责人Sandra Horning博士说:“在四项关键性研究中都获得了良好的疗效及安全性结果后,Hemibra成为了目前唯一一款获得FDA批准的治疗体内含或不含因子VIII抑制物的A型血友病预防药。我们感谢血友病患者群体一直以来对这款新型疗法的支持,现在我们终于可以将这款疗法呈现给所有A型血友病患者了。”

参考资料:

[1] FDA approves Roche’s Hemlibra for haemophilia A without factor VIII inhibitors. Retrieved October 5, 2018, from https://www.roche.com/media/releases/med-cor-2018-10-04c.htm

[2] 出血减少97%!罗氏重磅血友病新药3期数据积极. Retrieved October 5, 2018,

[2] 重磅!20年来首个血友病新药今日获批. Retrieved October 5, 2018

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    2018-10-08 wfang546
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    2018-10-08 xxxx1054
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    2018-10-06 医者仁心5538

    学习了

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