相关实验视频
Updated: May 2, 2026

09:37
Cellular Encapsulation in 3D Hydrogels for Tissue Engineering
Published on: October 26, 2009
36.9K
三维DNA水凝介导的双模式传感方法,用于定量表皮细胞粘附分子在生物流体样本中的数量
Lu Huang1, Hanbing Huang1, Zhuomin Zhang1
1School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China.
Analytical chemistry
|July 15, 2024
概括
使用Au@Ag纳米颗粒和DNA水凝的新双模式传感方法可以在生物流体中灵敏地检测上皮细胞粘附分子 (EpCAM). 这种方法为疾病诊断和健康管理提供了可靠的工具.
科学领域:
- 生物医学工程 生物医学工程
- 分析化学 分析化学
- 纳米技术 纳米技术
背景情况:
- 在生物流体中监测蛋白质生物标志物,如上皮细胞粘附分子 (EpCAM),对于疾病诊断至关重要.
- 现有的EpCAM量化方法由于表达变异性,可溶性形式和矩阵效应而面临挑战.
研究的目的:
- 开发一种灵敏可靠的双模式传感方法,用于定量生物流体中的微量EpCAM.
- 建立EpCAM的实际量化策略,以帮助早期疾病诊断和健康管理.
主要方法:
- 一种表面增强的拉曼散射 (SERS) -光 (FL) 双模式传感方法是使用双金属Au@Ag纳米粒子和化量子点封装DNA水凝混合体与石墨烯氧化物 (Au@Ag-NQDs/GO) 开发的.
- 该方法采用DNA水凝与体DNA (AptDNA) 连接器,该连接器在EpCAM相互作用时分解,触发"开启"SERS和"关闭"FL信号以进行同时定量.
- 该传感平台的灵敏度,稳定性和特异性使用各种生物流体样本进行了测试,包括癌细胞溶解物,血清和尿液.
主要成果:
- 双模式方法在0.5-60.0 pg/mL范围内实现了EpCAM定量化的高灵敏度和稳定性.
- 对SERS和FL的检测极限 (LODs) 分别低至0.17 pg/mL和0.35 pg/mL.
- 在真实生物样本中证明了令人满意的特异性和恢复 (RSD 2.8-6.3%).
结论:
- 开发的SERS-FL传感方法提供了一种灵敏,可靠和实用的方法,用于量化各种生物流体中的痕迹EpCAM.
- 这种技术具有改善早期疾病诊断和推进健康管理策略的巨大潜力.
相关概念视频
Electron Microscope Tomography and Single-particle Reconstruction
2.0K
Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
2.0K
Three-Dimensional Microscopy in Microbiology
907
Three-dimensional imaging techniques are essential in cell biology, allowing researchers to visualize intricate cellular structures with high resolution. Two prominent methods, Differential Interference Contrast Microscopy (DIC) and Confocal Scanning Laser Microscopy (CSLM), provide distinct advantages for imaging live and thick specimens, respectively.Differential Interference Contrast MicroscopyDIC microscopy enhances contrast in transparent, unstained samples by converting phase...
907

