基因治疗再遇滑铁卢,Celladon心衰药物二期临床失败

2015-04-28 佚名 美中药源

今天下午美国生物制药公司Celladon宣布其心衰药物Mydicar 在一个叫做CUPID2二期临床彻底失败,错过实验一级和二级终点。实验一级终点为心衰诱发住院事件,二级终点为全因死亡、心脏移植、和体外循环支持治疗事件。 Mydicar是一个通过病毒递送SERCA2a基因的药物,用于严重心衰病人。慢性心衰是市场亟需新药的一个领域,已经20年没有新药上市。SERCA2a基因的蛋白产品是一个AT

今天下午美国生物制药公司Celladon宣布其心衰药物Mydicar 在一个叫做CUPID2二期临床彻底失败,错过实验一级和二级终点。实验一级终点为心衰诱发住院事件,二级终点为全因死亡、心脏移植、和体外循环支持治疗事件。

Mydicar是一个通过病毒递送SERCA2a基因的药物,用于严重心衰病人。慢性心衰是市场亟需新药的一个领域,已经20年没有新药上市。SERCA2a基因的蛋白产品是一个ATP水解酶,和心肌钙离子的转运关系密切。在一个叫CUPID1的一/二期临床实验中,SERCA2a显示能降低52%的心衰恶化风险,并于去年获得FDA突破性药物地位。Celladon曾获得辉瑞、诺华、强生等大公司的投资。

上个月施贵宝与荷兰生物技术公司UniQure达成总额可达10亿美元的投资协议,主要是针对其心衰基因疗法药物S100A1。当时有人曾质疑为什么施贵宝没有选择同在美国本土、同样开发心衰基因药物的Celladon。不知是当时已有什么信息还是撞上大运了,现在看来施贵宝那个决定显然是明智的。当然这不意味着S100A1会成功。事实上明天股市可能会惩罚所有从事基因疗法的公司,毕竟这是和其它疗法完全不同的治疗策略。尽管多数认为这个策略早晚会成功,但没人愿意在基因疗法成功之前自己先破产。当然从乐观的角度看现在竞争对手少了一个,如果S100A1成功会独享成果,所以有些赌徒会double down。

心衰是一个非常常见、非常复杂的疾病,多年来没有什么进展。前年诺华的Serelaxin在一个三期临床实验虽然仅达到部分疗效终点,但作为安全性终点意外发现Serelaxin能降低6个月死亡率,曾令很多人对这个产品抱有很大希望。但去年被FDA专家组11:0枪毙,欧盟也拒绝了该药的上市申请。上周诺华的季度投资者电话会议上有人问起这个产品,诺华的态度并不十分积极。但是诺华另一个产品LCZ696却是有极大可能成为一个重磅主流心衰药物。LCZ696比标准疗法依那普利降低20%心脏病死亡率。但也有人指出依那普利只用了中间剂量而LCZ696却用了最高剂量。

去年已有一个基因疗法药物在欧洲上市,但总的来说是满纸辛酸泪。基因疗法对单基因遗传病的胜率较大,对于心衰这种机理复杂,病人并发症和用药多样复杂的疾病困难则很大。但是基因疗法可以直接增加一个蛋白功能,这是其它药物(多数是抑制蛋白功能,除了少数受体激动剂外)无法做到的。所以基因疗法还是值得继续开发的。

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    2015-07-16 hb2008ye
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    2015-12-08 维他命
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    2015-05-01 hbwang006

    基因治疗是趋势

    0

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    2015-04-29 chenhui888

    转基因的食物为什么那么多

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    2015-04-28 medcardio

    基因治疗多么不靠谱

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