氨酸选择性生物结合反应剂,用于有效的原生蛋白质的F标签
Pragalath Sadasivam1,2,3,4, Shivashankar Khanapur2, Siddesh V Hartimath2
1School of Biomedical Engineering and Imaging Sciences, Department of Imaging Chemistry and Biology, King's College, London SE1 7EH, U.K.
Journal of medicinal chemistry
|March 14, 2024
概括
一个新的素选择性假肢组,4-[18F]基酸 ([18F]FPG),可以有效地为PET成像对蛋白质进行18F标记. 这一发展推动了通过新型放射性药物进行个性化医疗和早期疾病检测.
科学领域:
- 放射化学 放射化学是指辐射化学.
- 生物结合化学 生物结合化学
- 分子成像学分子成像学
背景情况:
- 基于蛋白质的正电子发射断层扫描 (PET) 标记器对于早期疾病检测和个性化医学至关重要.
- 这些标记物的开发取决于有效的-18 (18F) 假肢组进行标记.
- 现有的方法可能缺乏蛋白质修饰的选择性或效率.
研究的目的:
- 开发和评估一种新的素选择性假肢组,用于对蛋白质进行18F标记.
- 评估新试剂的放射合成,标记效率,选择性和体内性能.
- 在PET成像中探索产生的蛋白质合物的潜在应用.
主要方法:
- 4-[18F]基酸 ([18F]FPG) 的放射合成,采用一,两步程序.
- 评估[18F]FPG与各种蛋白质 (HSA,ubiquitin,IL-2,IL-4) 的结合效率和选择性.
- 评估[18F]FPG蛋白结合物的体外和体内稳定性和结合亲和力.
主要成果:
- [18F]FPG与未经腐蚀纠正的 (n.d.c.) 合成. 放射化学收益率 (RCY) 为 41 ± 8%.
- 通过n.d.c.实现了对多种蛋白质的有效18F标记. 孤立的RCY为30-60%.
- 观察到与氨酸残留物高度选择性结合,保持蛋白质功能,并证明体内稳定性.
结论:
- [18F]FPG是一种多功能,选择性氨酸生物结合试剂,用于开发18F标记的蛋白质放射性药物.
- [18F]FPG-HSA结合体显示出作为血液池成像剂的潜力,这是由于长时间的血液保留.
- 这种试剂促进了PET成像技术的进步,用于疾病诊断和个性化治疗策略.
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