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大逆转,曾终止临床三期的AD药物aducanumab将申请上市昨日(10月22日),渤健(Biogen)和卫材(Eisai)联合宣布,在与美国FDA沟通后,渤健

2019-10-23 佚名 医谷

昨日(10月22日),渤健(Biogen)和卫材(Eisai)联合宣布,在与美国FDA沟通后,渤健计划对早期阿尔茨海默病(AD)试验性治疗药物aducanumab(BIIB037)递交上市申请(BLA),并将继续与欧洲、日本等地区的监管机构进行协商。

频频折戟临床的阿尔兹海默症药物竟然迎来了反转。

昨日(10月22日),渤健(Biogen)和卫材(Eisai)联合宣布,在与美国FDA沟通后,渤健计划对早期阿尔茨海默病(AD)试验性治疗药物aducanumab(BIIB037)递交上市申请(BLA),并将继续与欧洲、日本等地区的监管机构进行协商。

据了解,aAducanumab是一种是一种与β淀粉样蛋白(β-amyloid)结合的人类单克隆抗体,它能够有选择性地与AD患者大脑中的淀粉样蛋白沉积结合,然后通过激活免疫系统,将沉积蛋白清理出大脑,根据合作开发和许可协议,渤健从Neurimmune许可引进了aducanumab,自2017年10月以来,渤健和卫材在全球范围内合作开展了aducanumab的开发和商业化。

而早在今年3月,渤健和卫材曾宣布终止aducanumab两项代号分别为ENGAGE和EMERGE的全球III期研究(这两项研究都给与了患者3mg/kg、6mg/kg、10 mg/kg三种不同剂量的治疗),当时给出终止的理由是在经独立的数据监测委员会对这两项研究的数据进行全面分析后认为:aducanumab对于阿尔茨海默病以及轻度阿尔茨海默病痴呆引起的轻度认知功能损伤没有改善作用,很可能难以到达主要疗效终点。

不过,在宣布终止临床试验后,渤健对包含更多患者的数据集进行了分析,发现在名为EMERGE的临床试验中,剂量为10mg/kg的aducanumab能够显着改善患者认知能力,同时在名为ENGAGE的临床试验中,持续接受剂量为10mg/kg的aducanumab的部分患者的认知能力也得到了提高,具体来说,接受该剂量的患者在在认知和功能指标,如记忆、定向和语言方面显着获益,同时,患者的日常生活活动也有获益,包括个人理财、做家务以及独立外出旅行。同时,在这两项研究中,最常报告的不良事件是淀粉样蛋白相关的影像学异常水肿(ARIA-E)和头痛。大多数ARIA-E患者在ARIA-E发作期间没有出现症状,并且ARIA-E发作通常在4至16周内消失,通常没有长期的临床后遗症。

对aducanumab临床结果的上述新发现让渤健和卫材决定重新启动对aducanumab的申请程序,在今年6月和10月与FDA完成进一步分析之后,计划将在明年递交BLA,且将在2019年12月的阿尔茨海默氏病临床试验(CTAD)会议上提供有关EMERGE和ENGAGE更大数据集的新分析的进一步详细信息。

如果此次提交获得批准,aducanumab将成为减少阿尔茨海默氏病临床下降的首个疗法,并且还将成为证明去除Aβ蛋白可带来更好的临床结果的首个疗法。

对于这一反转事件,业内都感到很惊喜,因为截止到目前,阿尔兹海默症领域获批的药物屈指可数,截至目前,仅有6种AD药物获FDA批准上市,分别为1993年批准的他克林、1996年批准的多奈哌齐、2000年批准的卡巴拉汀、2001年批准的加兰他敏、2003年批准的盐酸美金刚、2014年批准的美金刚/多奈哌齐复方制剂。另有9款药物在美国之外的其他国家获批上市,所有这些药物都只是对症治疗,主要是改善认知和记忆障碍,但没有一种能够阻止或者延缓阿尔茨海默症病情的进展。

另值得一提的是,我国原创的抗阿尔茨海默症新药GV-971或不久将迎来获批上市,其三期临床研究结果显示, GV-971能明显改善AD患者认知功能障碍,与安慰剂组相比,ADAS-cog12量表平均改善值为2.54,具有极其显着的统计学意义(p<0.0001)。在疾病严重程度偏重的亚组中(MMSE量表评分在11-14)疗效尤为显着,与安慰剂组相比,ADAS-cog12量表平均改善值为4.55。GV-971对次要疗效指标 CIBIC-plus具有明显改善趋势(p=0.059);但对ADCS-ADL量表和NPI问卷尚未观察到统计学意义。GV-971组和安慰剂组相比,其不良事件或严重不良事件的发生率无显着统计学差异,GV-971安全性好,耐受性强。有分析人士预测,GV-971有望成为全球首个糖类多靶抗阿尔茨海默症创新药物。

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    2020-01-31 sunylz
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    2020-09-08 snf701207
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    2019-10-25 qjddjq
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