基于抗体的近红外化探针用于细胞表面蛋白质的无洗成像
Haoting Wang1, Jiaqi Yan1, Wenchao Wang1
1Institute of Drug Metabolism and Pharmaceutical Analysis, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China.
Analytica chimica acta
|August 14, 2024
概括
我们开发了一种新的化抗体探针 (Ab-Cy5.5),用于对细胞表面蛋白质进行无洗,近红外成像. 这种方法可以在活细胞和组织中直接可视化,有助于诊断疾病.
科学领域:
- 生物医学成像技术 生物医学成像技术
- 分子生物学分子生物学
- 药物发现 药物发现 药物发现
背景情况:
- 细胞表面蛋白在生理和病理过程中至关重要,这使得它们成为药物发现和疾病诊断的关键目标.
- 精确的细胞表面蛋白质的成像在它们的原生环境中对于早期疾病检测和预后至关重要.
- 当前的成像技术往往需要洗步骤,并且可能会受到自光的影响,限制它们在复杂的生物样本中的应用.
研究的目的:
- 开发一种新的成像探测器,用于敏感和特定检测细胞表面蛋白质.
- 为了能够在活细胞和组织样本中直接对目标蛋白进行无洗的成像.
- 为了最大限度地减少背景噪声和自光干扰,以提高成像质量.
主要方法:
- 开发一种基于原抗体的探针 (Ab-Cy5.5),利用近红外 (NIR) 辐射.
- 在抗体的N端附加Cy5.5染料以利用光灭的二维H聚合.
- 在没有洗步骤的情况下,在活细胞和组织样本中测试探头的性能.
主要成果:
- 在与目标抗原结合后的10分钟内,Ab-Cy5.5探测器显示了超过5倍的激活NIR发射.
- 由于光灭机制,观察到可以忽略的背景信号.
- 在活细胞和组织样本中成功实现了对目标细胞表面蛋白的直接成像.
结论:
- Ab-Cy5.5提供了一种敏感和特定的方法,用于对细胞表面蛋白质进行无洗成像.
- 探测器在没有洗的情况下运行的能力简化了成像过程,并保留了原生细胞环境.
- 这项技术具有显著的潜力,可以通过对细胞表面点的改进可视化来推进疾病诊断和药物发现.
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