结合FcRn对大脑中单克隆抗体配置的影响
Hsien Wei Huang1, Shengjia Wu1, Shufang Liu1
1Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, the State University of New York, 455 Pharmacy Building, Buffalo, New York, 14214-8033, USA.
The AAPS journal
|April 1, 2025
概括
在中性和酸性pH值下增强与新生儿Fc受体 (FcRn) 结合的工程抗体显著增加了大脑暴露. 修改FcRn结合会影响抗体的大脑配置和保留.
科学领域:
- 药理学 药理学是指药理学的学科.
- 免疫学 免疫学 免疫学
- 神经科学是一个神经科学.
背景情况:
- 新生儿Fc受体 (FcRn) 在延长免疫球蛋白G (IgG) 抗体的半衰期方面发挥着至关重要的作用.
- 了解FcRn在大脑透中的作用对于开发针对神经系统疾病的抗体治疗方法至关重要.
研究的目的:
- 调查FcRn结合亲和力和pH依赖性对单克隆抗体大脑处置的影响.
- 评估工程FcRn结合变异如何影响等离子体中的抗体药理动力学,大脑间歇液 (ISF) 和大脑同质化.
主要方法:
- 使用了表达人类FcRn (hFcRn) 的小鼠和具有修改FcRn结合的特斯图祖马布的工程变体.
- 随着时间的推移,静脉注射了抗体,并测量了血,ISF和大脑同质度.
- 度-时间曲线 (AUC) 的比例 (大脑/血和ISF/血) 下的计算面积,以评估大脑和ISF暴露.
主要成果:
- 野生型抗体显示低脑:血 (0.70%) 和ISF:血 (0.59%) 的AUC比率.
- 在中性和酸性pH下增强FcRn结合的YPY突变体,表现出最高的大脑 (3.86%) 和ISF (3.49%) AUC比率.
- 只有在酸性pH (YTE) 强化结合的突变体没有改善,而完全FcRn结合废除 (IHH) 导致更高的ISF保留.
结论:
- 在中性和酸性pH值的FcRn结合对于有效的抗体转细胞进入大脑至关重要.
- 工程FcRn结合亲和力可以是一个增强大脑抗体暴露的策略.
- FcRn相互作用显著影响大脑的配置和抗体的间歇性液体保留.
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