评估隐球菌素负载抗体-药物共轭物的效力和特异性

IF 2.6 4区 生物学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY
ChemBioChem Pub Date : 2024-10-27 DOI:10.1002/cbic.202400738
Peter Bitsch, Cedric Dessin, Sebastian Bitsch, Jona Voss, Janine Becker, Panna Sharma, Neha Biyani, Harry Kochat, Norbert Sewald, Harald Kolmar
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引用次数: 0

摘要

抗嗜血杆菌毒素隐球菌素的增强型变体与抗Her2单克隆抗体(mAb)曲妥珠单抗(Trastuzumab)在迈克尔的作用下结合在一起。在隐球菌素的马来酰亚胺衍生物中加入了释放了铰链区半胱氨酸的抗体或在 mAb 轻链中加入了工程半胱氨酸的 THIOMAB 格式抗体。这些抗体药物共轭物(ADCs)显示出与 Her2 阳性肿瘤细胞的持久结合力,对高 Her2 表达的 SK-BR-3 细胞的高效细胞杀伤力在两位数 pM 范围内。与作为参照物的 DAR 6 MMAE ADC 相比,两种 ADC(DAR 6、DAR 3)对中等受体表达水平的细胞系 JIMT-1 和 RT112 的细胞杀伤力更强。观察到的细胞毒性与靶点有关,因为低 Her2 表达的 MDA-MB468 细胞的细胞活力没有受到影响。特别是 THIOMAB 格式的 DAR 3 ADC 表现出了理想的生物物理特性和高效力,有望成为进一步体内研究的候选药物。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evaluation of Potency and Specificity of Cryptophycin-Loaded Antibody-Drug Conjugates.

An enhanced variant of the antimitotic toxin cryptophycin was conjugated to the anti-Her2 monoclonal antibody (mAb) Trastuzumab upon Michael addition. Either antibodies with freed hinge-region cysteines or THIOMAB formats with engineered cysteines in the mAbs light chain were added to a maleimide derivative of cryptophycin. These Antibody-Drug Conjugates (ADCs) showed retained binding to Her2 positive tumor cells and highly efficient cell killing in double-digit pM range on high Her2-expressing SK-BR-3 cells. Two ADCs (DAR 6, DAR 3) showed superior cell killing of the cell lines JIMT-1 and RT112 with medium receptor expression level in comparison with a DAR 6 MMAE ADC serving as reference. The observed cell cytotoxicity is target-dependent since no impact on cell viability was observed for low Her2-expressing MDA-MB468 cells. Particularly the DAR 3 ADC in THIOMAB format exhibiting desirable biophysical properties and high potency emerged as a promising candidate for further in vivo investigations.

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来源期刊
ChemBioChem
ChemBioChem 生物-生化与分子生物学
CiteScore
6.10
自引率
3.10%
发文量
407
审稿时长
1 months
期刊介绍: ChemBioChem (Impact Factor 2018: 2.641) publishes important breakthroughs across all areas at the interface of chemistry and biology, including the fields of chemical biology, bioorganic chemistry, bioinorganic chemistry, synthetic biology, biocatalysis, bionanotechnology, and biomaterials. It is published on behalf of Chemistry Europe, an association of 16 European chemical societies, and supported by the Asian Chemical Editorial Society (ACES).
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