对等离子体表面生物功能的实验优化,以实现sPD1的双模生物传感和动力特征
Fahd Khalid-Salako1,2, Hasan Kurt3,4,5, Meral Yüce1
1Sabanci University Nanotechnology Research and Application Centre, 34956 Istanbul, Türkiye.
ACS omega
|January 19, 2026
概括
一个新的生物传感器平台可以同时检测和动力分析可溶性PD-1 (sPD1) 和其抗体相互作用. 该工具通过量化血清中的sPD1来帮助免疫瘤学研究,这对于免疫检查点分析至关重要.
科学领域:
- 生物医学工程 生物医学工程
- 免疫学 免疫学 免疫学
- 分析化学 分析化学
背景情况:
- 溶性PD-1 (sPD1) 在癌症中起着复杂的作用,受到免疫检查点蛋白和抗体疗法的影响.
- 现有的生物传感器平台缺乏对sPD1-抗体相互作用的同时量化和动力分析的能力.
- sPD1正在成为免疫瘤分析的重要液体活检生物标志物.
研究的目的:
- 开发和验证一种新的表面等离子体共振 (SPR) 生物传感器.
- 为了实现sPD1-抗体相互作用的同时,无标签的量化和实时动态分析.
- 评估生物传感器在缓冲体和人体血清中的性能,以便进行潜在的临床监测.
主要方法:
- 开发一个SPR折射度生物传感器,使用nivolumab.
- 优化传感器功能化和再生协议.
- 在缓冲剂和人血清中对sPD1的无标签量化和动态分析.
主要成果:
- 生物传感器的检测极限为5 ng/mL,sPD1.1的动态范围为8.7 ng/mL至376 μg/mL.
- 血清中sPD1的量化显示出良好的恢复 (93±5%在1%的血清中,62±30%在10%的血清中).
- 尼沃卢马布-PD1相互作用的确定的动力常数与文献价值保持一致 (KD ≈ 4.66 nM).
结论:
- 双模式SPR平台是第一个同时量化sPD1和表征sPD1抗体动态的平台.
- 这种生物传感器为研究和潜在的免疫检查点动态的临床监测提供了强大的工具.
- 该平台支持使用sPD1作为免疫瘤学中的液体活检生物标志物.
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