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CD37:艾伯维/Genmab合作的重要靶点

2020-10-11 Eastwood 生物制药小编

2020年6月,艾伯维与Genmab达成40亿美元合作协议(预付款7.5亿美元),共同开发后者的CD3/CD20双抗、CD37双表位双抗和CD3/5T4双抗。

2020年6月,艾伯维与Genmab达成40亿美元合作协议(预付款7.5亿美元),共同开发后者的CD3/CD20双抗、CD37双表位双抗和CD3/5T4双抗。

Genmab的CD37双表位双抗建立在其DuoHexabody技术上,引入E430G突变起到抗原结合依赖的六聚体形成,引入F405L、K409R体外构建双特异性抗体。六聚体的主要作用是增强补体CDC活性。

CD37双抗基于010和016两个单抗构建,其结合表位如下图。

In vitro和ex vivo试验表明,DuoHexaBody-CD37诱导更强的补体CDC活性。

DuoHexaBody-CD37特异性清除B细胞,对其他淋巴细胞则没有影响。

小鼠肿瘤模型中,DuoHexaBody-CD37表现出更强的抗肿瘤活性。

小编总结
CD37在多种B细胞淋巴瘤上广泛表达,包括NHL和CLL等。DuoHexaBody-CD37整合的Duobody和Hexabody两种技术,同时靶向CD37的两个表位,且能诱导极强的CDC效应。国外目前有多个CD37抗体或ADC处于临床前或早期临床阶段。国内该靶点尚少有企业布局,目前仅CDMO企业皓阳生物申报了一款CD19/CD37双抗专利。

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    2020-10-13 docwu2019
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    2020-10-12 ms4000002070088423

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