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达 83% 临床止血,抗凝血新药中期数据积极

2018-03-20 佚名 药明康德

近日,Portola Pharmaceuticals 在美国心脏病学会(American College of Cardiology,ACC)科学年会上公布了其正在进行的 ANNEXA- 4 临床研究的中期数据。数据表明,实验性逆转剂 AndexXa®(andexanet alfa)与抗因子 Xa 抑制剂活性降低和出血控制相关。

近日,Portola Pharmaceuticals 在美国心脏病学会(American College of Cardiology,ACC)科学年会上公布了其正在进行的 ANNEXA- 4 临床研究的中期数据。数据表明,实验性逆转剂 AndexXa?(andexanet alfa)与抗因子 Xa 抑制剂活性降低和出血控制相关。

鉴于 Xa 因子抑制剂在预防栓塞性疾病如中风,和肺栓塞方面表现出的有效性,因此其得以广泛使用并表现出稳定的增长。然而,与因子 Xa 抑制剂出血有关的住院和死亡发生率也在增加。仅在美国,2016 年因 Xa 相关性出血导致的入院人数约为 117,000 人,每月有超过 2,000 人因出血而死亡。

Andexanet alfa 是 Portola Pharmaceuticals 公司在研的、专门设计用于逆转直接和间接因子 Xa 抑制剂的抗凝血活性。Andexanet 是一种经过修饰的人类蛋白质,一旦被 Andexanet 结合,因子 Xa 抑制剂就不能结合并抑制天然因子 Xa,因此可能允许恢复正常的止血过程。Andexanet 正在研发中,以解决与因子 Xa 抑制剂相关的主要并有时致命的出血问题。美国 FDA 已经授予 andexanet 突破性疗法认定。

在 ANNEXA- 4 研究执行委员会主席、麦克马斯特大学(McMaster University)健康科学系医学部教授 Stuart Connolly 博士的带领下,研究人员评估了这种 first-in-class 药物的两个共同主要临床终点——降低抗因子 Xa 抑制剂活性并在给药后 12 小时内实现临床止血。该研究共登记招募了来自美国、加拿大和欧洲的 228 名患者,其中 132 名患者被判定为具有疗效结果。所有参与研究的患者服用四种 Xa 因子抑制剂(apixaban 阿哌沙班,rivaroxaban 利伐沙班,edoxaban 依度沙班,enoxaparin 依诺肝素)后 18 小时内出现急性大出血。他们接受了 andexanet 注射后再进行两小时的药物输注,剂量根据患者所服用的特定因子 Xa 抑制剂和自最后剂量的时间来确定。


▲Portola Pharmaceuticals 研发管线一览(图片来源:Portola Pharmaceuticals 官方网站)

服用利伐沙班的患者抗因子 Xa 抑制剂活性平均下降 88%,服用阿哌沙班的患者下降 91%,服用依诺肝素的患者下降 75%。研究中很少有患者接受依度沙班治疗。83% 的患者达到优异或良好的临床止血效果。在所有 228 名患者中评估了 andexanet 的安全性。在 30 天时,12% 的患者死亡,11% 的患者发生血栓形成事件。

Connolly 博士说:“当你考虑到 ANNEXA- 4 临床研究参与人群的高风险特征(其中包括大量老年患者出现颅内出血并抗静脉血栓栓塞的抗凝治疗),以及目前没有任何 FDA 或者 EMA 批准的适用于这些患者的逆转剂时,这些数据显得尤其引人注目。临床疗效和安全性数据继续支持 AndexXa 作为解决凝血因子 Xa 相关性出血的抗凝治疗的解毒剂。”

我们祝愿 andexanet 研发顺利,早日获批上市,为急性出血患者带来治疗的福音。

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    2018-03-26 衣带渐宽

    学习

    0

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    2018-03-22 jeanqiuqiu
  3. [GetPortalCommentsPageByObjectIdResponse(id=299893, encodeId=d33a2998931b, content=学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=68, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmhead/Q3auHgzwzM6P57Bs8gOPaY1cQP9lIia0lmZOEXraGaoicqNToIslXDKw/0, createdBy=7a041951742, createdName=衣带渐宽, createdTime=Mon Mar 26 14:37:41 CST 2018, time=2018-03-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1263043, encodeId=509e12630435d, content=<a href='/topic/show?id=ebb5631e076' target=_blank style='color:#2F92EE;'>#止血#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=54, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=63170, encryptionId=ebb5631e076, topicName=止血)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=6f7770, createdName=jeanqiuqiu, createdTime=Thu Mar 22 01:14:00 CST 2018, time=2018-03-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=298072, encodeId=56f32980e249, content=阅, beContent=null, objectType=article, channel=null, level=null, likeNumber=70, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/vi_32/fhZdOu27e88Voqh19n8eF8cLplo8L4nicKtH0WnE3KFELXns5XDu8rsiceK2HHDZc2SEStia5VV3Pia2QLMVqlWbHw/0, createdBy=6e012139475, createdName=神功盖世, createdTime=Tue Mar 20 13:30:50 CST 2018, time=2018-03-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=298041, encodeId=eae32980413e, content=认真学习.不断进步.把经验分享给同好.点赞了!, beContent=null, objectType=article, channel=null, level=null, likeNumber=48, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mStl88fu4NfNLvzZhgPxRuUXgacXpPeW0x8Z3Qr9c3I2kTic4ZIpR29iaftYgkjRcbv982icYMtqANBPYBgPnOia6mVtX76qMXuc/0, createdBy=d85d1636106, createdName=lietome2, createdTime=Tue Mar 20 12:08:37 CST 2018, time=2018-03-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=298035, encodeId=c582298035d0, content=学习谢谢分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=64, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/oLAjfB7s1ib2JlGvwpAibiaovVhfA9DbO7X7JLGGjM4Cic6oMgxLdnuS9piaP9cnG2OwIbkzHvX0qzS1boibyYNqR5vHZu7HQs5EIB/0, createdBy=298d1398341, createdName=lou.minghong, createdTime=Tue Mar 20 10:26:35 CST 2018, time=2018-03-20, status=1, ipAttribution=)]
    2018-03-20 神功盖世

    0

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    2018-03-20 lietome2

    认真学习.不断进步.把经验分享给同好.点赞了!

    0

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    2018-03-20 lou.minghong

    学习谢谢分享!

    0

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