针对FAP的可变新抗原受体的表征,这些受体是从一个新的免疫图书馆中分离出来的
Gihan S Gunaratne1, Joseph P Gallant1, Kendahl L Ott1,2
1Department of Pathology and Laboratory Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA.
Communications biology
|August 13, 2025
概括
鱼衍生的可变新抗原受体 (VNARs) 针对纤维细胞激活蛋白 (FAP) 显示出癌症治疗的前景. 这些VNAR-Fc结构有效地针对FAP阳性瘤进行药物输送和成像.
科学领域:
- 生物技术是生物技术.
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
背景情况:
- 与癌症相关的纤维细胞 (CAF) 创造了一个免疫抑制的瘤微环境 (TME),阻碍了癌症治疗.
- 由CAFs表达的纤维细胞激活蛋白 (FAP) 是克服治疗耐药性的治疗标.
- 来自鱼的可变新抗原受体 (VNAR) 提供了独特的治疗潜力.
研究的目的:
- 开发用于癌症治疗的新型抗FAP VNAR-Fc融合蛋白.
- 评估VNAR-Fc构造作为抗体-药物结合物和成像剂的疗效.
主要方法:
- 通过鱼免疫来生成一个反FAP VNAR菌体显示库.
- 使用生物和in silico方法识别抗FAP VNAR.
- 对VNAR-Fc融合蛋白用于FAP结合,内化和治疗应用的表征.
主要成果:
- 四种抗FAP VNAR-Fc结构显示出高亲和度的FAP识别和FAP阳性细胞的快速内化.
- 在试验室中,VNAR-Fc结构作为有效的抗体-药物结合物,当与抗真菌有效载荷结合时.
- 在体内,VNAR-Fc构造物成功地局部化到FAP阳性异种移植物中,使得正子发射断层扫描成像成为可能.
结论:
- VNAR-Fc构造代表了开发针对TME的创新癌症治疗的多功能平台.
- 这些构造具有在瘤学中双重治疗和诊断应用的潜力.
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