Moderna Cancer vaccine Phase III trial brings good news; Stock price doubles for a while
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Moderna Personalized mRNA Cancer vaccine Phase III trial meets standards, stock price soars and triggers short covering.
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Moderna 与默沙东联合开发的个体化 mRNA 癌症疫苗公布三期试验积极结果后,市场迅速作出反应。受消息推动,Moderna 股价周三一度大涨约 131%,做空该股的投资者也因此承受大额账面亏损。

三期试验达到两项主要终点

两家公司表示,INTerpath-001 三期试验评估的是 intismeran autogene 联合 Keytruda,用于已接受手术切除的 IIB 至 IV 期黑色素瘤患者。

这项试验达到无复发生存期和无远处转移生存期两项主要终点,意味着该联合疗法在术后辅助治疗中,表现优于单独使用 Keytruda 的现有标准方案。

这是个体化新抗原疗法首次取得积极三期结果,也是 mRNA 癌症治疗首次在三期试验中传出正面数据。

疫苗按患者肿瘤特征定制

这款疗法也被称为 V940 或 mRNA-4157,并不是统一批量生产的成品。医生会先对患者肿瘤进行测序,识别其中的特定突变,再据此设计个体化 mRNA 疫苗。

其作用是让人体生成与这些突变相关的新抗原蛋白片段,从而帮助免疫系统识别并攻击残留癌细胞。与之配合的 Keytruda 属于抗 PD-1 免疫疗法,作用是增强免疫细胞活性。

两者联合使用,目标是在手术后进一步清除可能残留的癌细胞,降低癌症复发和转移风险。

股价飙升引发空头回补

对 Moderna 来说,这次试验结果意义尤其突出。此前公司在新冠疫苗业务降温后,增长承压,且一直是美股中空头仓位较高的大盘股之一。

随着利好消息公布,市场迅速出现空头回补。文章称,做空 Moderna 的交易者面临约 48 亿美元的按市值计算浮亏,而该股空头仓位约占自由流通股的 13.5%。

在高空头持仓背景下,股价急涨往往会迫使部分借券卖空者买回股票平仓,从而进一步放大涨幅。

后续仍将观察总生存期

目前披露的数据主要集中在两项关键终点。试验仍将继续推进,后续还会评估总生存期以及其他次要终点。

这意味着,虽然首份三期结果已推动市场重估 Moderna 的肿瘤管线价值,但该疗法的长期临床表现仍有待进一步数据披露。

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