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Rapid Antibody Glycoengineering in Chinese Hamster Ovary Cells
Published on: June 2, 2022
对完整的IgG抗体进行化学酶性糖基工程,以获得功能
Wei Huang1, John Giddens, Shu-Quan Fan
1Institute of Human Virology and Department of Biochemistry & Molecular Biology, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA.
Journal of the American Chemical Society
|July 4, 2012
概括
这项研究引入了一种新的化学酶法,用于精确地改变IgG抗体上的N-甘氨酸. 这种糖基工程方法允许创建具有增强治疗功能的同质抗体糖形,例如改善抗体依赖细胞细胞毒性和抗炎活性.
科学领域:
- 生物化学 生物化学
- 免疫学 免疫学 免疫学
- 葡萄糖生物学 葡萄糖生物学
背景情况:
- Fc N-glycans显著影响IgG效应器功能,影响抗体依赖细胞细胞毒性 (ADCC) 和抗炎性质.
- 调节Fc甘氨酸结构,例如核心化和化,提供了一种提高单克隆抗体和静脉注射免疫球蛋白 (IVIG) 疗效的策略.
研究的目的:
- 开发一种高效的化学酶方法,用于完整的单克隆抗体和IVIG的选择性Fc糖基工程.
- 为了产生具有量身定制的效应器功能的同质IgG糖形.
主要方法:
- 从EndoS生成两个新的糖合成酶突变物 (EndoS-D233A和D233Q),以实现高效的N-糖甘转移.
- 选择性Fc脱糖化和随后的预定义的N-甘氨酸从甘氨酸oxazolines转移到Fc-deglycosylatedIgG.
- 该方法应用于Rituximab和IVIG,用于制造特定的葡萄糖形式.
主要成果:
- 瑞图西马布成功转化为均的甘油形式,包括完全化 (S2G2F) 甘油形式和非化G2甘油形式,具有增强的FcγIIIa受体结合.
- 通过EndoS在Fab糖化酶的存在下,证明了选择性FcN-甘氨酸的去除.
- 将IVIG工程转化为完全化Fc糖形式,具有潜在增强的抗炎活性.
结论:
- 开发的化学酶法为完整的IgG提供了一个多功能平台,用于对完整的IgG进行选择性Fc糖基工程.
- 这种方法可以精确调节IgG效应器功能,从而优化治疗疗效和新型抗体功能.
- 工程制造的葡萄糖形式有望改善治疗方法,特别是在增强抗炎活性和ADCC方面.
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