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默沙东10亿美元豪掷T细胞接合剂免疫疗法(TCE)

2020-12-26 MedSci原创 MedSci原创

日前,生物技术公司Janux Therapeutics与默沙东(MSD)建立了战略合作伙伴关系,

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日前,生物技术公司Janux Therapeutics默沙东MSD建立战略合作伙伴关系并签署了价值高达10亿美元的许可协议,以发现、开发和商业化创新下一代T细胞接合剂(engager)免疫疗法,用于治疗癌症

默沙东公司将利用Janux的肿瘤激活T细胞激活剂(TRACTr)技术,针对默沙东公司选择的两个癌症靶点设计新的T细胞接合剂候选药物。Janux公司专有的肿瘤激活T细接合Tumor Activated T Cell EngagerTRACTr)技术设计开发候选T细胞接合剂免疫疗法。

Janux公司的总裁兼首席执行官David Campbell表示:“在Janux,我们开发了一种技术,可以设计出具有强大功能且具有高度肿瘤特异性的一流T细胞接合剂,可以杀死肿瘤细胞但保留健康组织。与肿瘤免疫学的全球领导者默沙东合作,为我们开发下一代T细胞接合剂免疫疗法提供了重要的专业知识和资源,将这种免疫疗法推向更广大的肿瘤患者。

默沙东从合作伙伴那里获得了产品和知识产权的独家全球许可,作为回报,Janux可以从每个目标中获得高达5.005亿美元的预付款和里程碑付款,以及合作产生的任何产品的销售特许权使用费。

默沙东公司在一份声明中说,它将资助这项研究。

今年,默沙东公司签署了一系列协议,其中包括COVID-19研究以及癌症,例如其针对TriNKET免疫疗法候选药物的蜻蜓疗法协议以及28亿美元的交易计划VelosBio并获得其抗ROR1 ADC。

默沙东公司希望在癌症领域下更大的赌注,希望像检查点抑制剂Keytruda一样再次赢得金牌,后者已成为有史以来最畅销的药物之一。

T细胞接合剂是一类新兴的免疫疗法,可与肿瘤细胞结合并募集患者的T细胞以根除肿瘤细胞。过去曾对此进行过尝试,但出于安全考虑,一些研究受到了限制。

Janux相信,而且默沙东现在也必须相信,其技术可以克服这些问题“通过将肿瘤特异性激活与交叉药代动力学相结合,以生产出同类最佳的T细胞接合剂疗法。”

在早期的临床前工作中,其候选药物显示出“相对于标准T细胞参与者具有相当的抗肿瘤功效,但缺乏与细胞因子释放,健康组织毒性或全身免疫激活有关的相关责任。” 但是,该证据将需要在临床试验中显示。

David Campbell博士说:“在Janux,我们开发了一种技术,可设计出具有强大功能且具有高度肿瘤特异性的一流T细胞接合剂,这对于杀死肿瘤细胞但保留健康组织的免疫应答至关重要。” Janux总裁兼首席执行官.

“与免疫肿瘤学的全球领导者默克公司合作,为我们提供了开发下一代T细胞接合剂疗法的重要专业知识和资源,这些疗法将使免疫疗法对更多的癌症患者有效。”

T细胞接合剂免疫疗法

T细胞接合剂(TCE)是一类新兴的免疫疗法,通过结合肿瘤细胞,并募集患者的T细胞对肿瘤细胞进行杀伤。

TCE的有效剂量比典型抗体低10 000倍以上,但TCE也具有一些局限性,例如剂量限制性毒性、不良的药代动力学特性和减弱的功效等。其中,全身免疫激活是TCE疗法开发需要跨越的主要障碍。
 
第一代TCE会引发全身免疫应答,不仅攻击肿瘤,而且攻击健康组织,产生的毒性可能会威胁生命;第二代TCE减少了初始的全身免疫应答,但随着时间的推移,激活的TCE在体内的积累会导致健康组织中发生免疫激活。这不仅限制了TCE的开发,而且降低了能安全使用的药物剂量。

Janux开发了一种肿瘤激活T细胞衔接器(Tumor Activated T Cell Engager,TRACTr)技术,这一技术通过将交叉药代动力学与肿瘤特异性激活相结合,能使药物主动累积在肿瘤中,防止药物在健康组织中积累。

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TRACTr™平台(来源:Janux公司官网)
临床前研究中已证明,TRACTr药物可达到较高的安全倍数,具有与标准TCE相当的抗肿瘤功效,同时可防止细胞因子释放、健康组织毒性和全身免疫激活。
 

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来源:Janux官网

Janux公司的TRACTr™候选药物能够产生肿瘤特异性免疫反应,攻击并杀伤肿瘤细胞而不损伤患者的健康组织。此外TRACTr™候选药物还可以在肿瘤中活跃的积聚,防止在健康组织中累积。同时可以在肿瘤微环境中实现抗肿瘤效果,抑制非特异性全身免疫激活。

在临床前研究中,Janux的TRACTr™候选药物对具有T细胞标准的患者显示出相当的抗肿瘤效果,同时与细胞因子释放、健康组织毒性或全身免疫激活缺乏相关的责任。

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▲ Janux公司研发管线(图片来源:Janux公司官网

目前,Janux公司的候选药物均处于临床前阶段,目标涉及结直肠癌,胃食管癌,前列腺癌,非小细胞肺癌,三阴性乳腺癌卵巢癌

事实上,还有其他公司也在利用T细胞接合剂的技术。例如安进(Amgen)的双特异性T细胞接头(BiTE®)技术,日前基于BiTE®技术的「注射用倍林妥莫双抗」在中国获批上市;以及Maverick Therapeutics的COBRA平台。倍林妥莫双抗(Blinatumomab)是安进基于其先进的双特异性 T 细胞衔接系统(BiTE)开发,同是安进 BiTE 技术平台诞生的首个双特异性抗体产品,能够通过将肿瘤细胞上的 CD19 蛋白呈递给 T 细胞特异表达的 CD3 蛋白,进而激活免疫系统识别并杀灭肿瘤细胞。目前国外已经获批治疗复发/难治性 B 细胞前体急性淋巴细胞白血病(ALL)。刚刚被CDE批准在国内上市。

目前,TCE在一些血液学癌症中显示出了效果,已经有三种CD19靶向TCE获FDA批准。

文章来源:

1.Goebeler, ME., Bargou, R. C. T cell-engaging therapies — BiTEs and beyond. Nature Review Clinical Oncology (2020)
2. Voynov, V.; Adam, P.J.; Nixon, A.E.; Scheer, J. M. Discovery Strategies to Maximize the Clinical Potential of T-Cell Engaging Antibodies for the Treatment of Solid Tumors. Antibodies (2020)
3. Thakur A , Huang M , Lum L G . Bispecific antibody based therapeutics: Strengths and challenges. Blood Reviews (2018)
4. https://www.januxrx.com/janux-therapeutics-announces-collaboration-with-merck-to-develop-novel-drug-candidates-for-immuno-oncology-using-t-cell-engager-tractr-technology/
5.https://www.fiercebiotech.com/biotech/janux-pairs-up-merck-for-a-1b-plus-t-cell-engager-deal
6 https://www.businesswire.com/news/home/20201218005115/en/Janux-Therapeutics-Announces-Collaboration-with-Merck-to-Develop-Novel-Drug-Candidates-for-Immuno-Oncology-using-T-Cell-Engager-TRACTr-Technology

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    2020-12-28 yese
  2. [GetPortalCommentsPageByObjectIdResponse(id=1259982, encodeId=e6731259982c5, content=<a href='/topic/show?id=6ff910336054' target=_blank style='color:#2F92EE;'>#默沙东#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=96, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=103360, encryptionId=6ff910336054, topicName=默沙东)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=28d456, createdName=yese, createdTime=Mon Dec 28 12:30:55 CST 2020, time=2020-12-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=911446, encodeId=c32b9114463c, content=很好的文章,学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=90, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20201226/95ac6d022b194200b46211c8dd67d7d4/d7639abce33d42f18edacbf9c1818b2b.jpg, createdBy=1c242248512, createdName=医路顺丰, createdTime=Sun Dec 27 22:38:56 CST 2020, time=2020-12-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=911325, encodeId=aa50911325ba, content=豪掷十个亿, beContent=null, objectType=article, channel=null, level=null, likeNumber=105, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=/v1.0.0/img/user_icon.png, createdBy=a37a1710612, createdName=oo902, createdTime=Sun Dec 27 19:30:55 CST 2020, time=2020-12-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=911162, encodeId=1767911162cd, content=最新资讯, beContent=null, objectType=article, channel=null, level=null, likeNumber=102, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20201226/8f6199f1b6d44cbc85ab0ca32d15a198/7c0ca6363f1644d09fdd562f07ed78d0.jpg, createdBy=5fc04378756, createdName=14078833m07暂无昵称, createdTime=Sat Dec 26 22:18:05 CST 2020, time=2020-12-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=911144, encodeId=bad491114454, content=在<a href='/topic/show?id=148562431a3' target=_blank style='color:#2F92EE;'>#梅斯医学#</a>天天能学到新知识!赞一个!👍不过,懂得越多,感觉自己越落后, beContent=null, objectType=article, channel=null, level=null, likeNumber=191, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=62431, encryptionId=148562431a3, topicName=梅斯医学)], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20220519/c2ab253484ee4527a2d4e9589a4821ac/45de9bf494a54becb2ea4369c9d11e85.jpg, createdBy=7a3710, createdName=lovetcm, createdTime=Sat Dec 26 21:34:28 CST 2020, time=2020-12-26, status=1, ipAttribution=)]
    2020-12-27 医路顺丰

    很好的文章,学习了

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    2020-12-27 oo902

    豪掷十个亿

    0

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    2020-12-26 14078833m07暂无昵称

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