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用于针对T细胞急性淋巴细胞白血病的向治疗的同等CD47免疫毒素

Jihong Ma^1,2, Zhaohui Wang^1,2, Danielle Mintzlaff^1,2

¹Division of Plastic & Reconstructive Surgery, Department of Surgery, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO.

|November 19, 2024

概括

一种基于喉毒素的新型免疫毒素向CD47,在小鼠模型中有效治疗T细胞急性淋巴细胞白血病 (T-ALL). 这种疗法对CD47+癌症有望,对正常细胞的毒性最小.

科学领域:

在瘤学瘤学.
免疫治疗是一种免疫疗法.
生物技术是生物技术.

背景情况:

CD47在各种癌细胞上过度表达,包括T细胞急性淋巴细胞白血病 (T-ALL).
需要有针对性的疗法来解决表达CD47的恶性瘤.

研究的目的:

开发和评估一种基于喉毒素的双价抗人类CD47免疫毒素 (bi-CD47-IT) 用于向癌症治疗.
在T-ALL.临床前模型中评估双CD47-IT的疗效和安全性.

主要方法:

一个独特的DT耐药的Pichia pastoris表达系统被用来创建双CD47-IT.
在体内疗效在T-ALL细胞系衍生的异种移植 (CDX) 和患者衍生的异种移植 (PDX) 鼠标模型中进行了测试.
在人性化小鼠中进行了体外结合激烈度,血凝结和体内毒性研究.

主要成果:

双CD47-IT在延长存活时间和消耗各种组织中的T-ALL爆细胞方面表现出显著的有效性.
在T-ALL Molt-4 CDX模型中,治疗治愈了60%的小鼠.
双CD47-IT没有与人体红细胞结合,并没有观察到任何不良事件的人类淋巴细胞的过渡性轻微耗尽.

结论:

双CD47-IT表现出 CD47+ T-ALL 细胞的最佳结合力,同时不影响正常的红细胞.
免疫毒素是CD47+癌症的有希望和安全的治疗候选者.
皮奇亚牧草的表达系统为开发这种向治疗提供了一个强大的平台.

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