一个等离子纳米技术阵列传感器,用于在人体全血中选择性检测心血管疾病生物标志物
Frank Tukur1, Taylor Mabe2, Mengxin Liu1
1Department of Nanoscience, Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro, Greensboro, North Carolina 27401, United States.
这项研究引入了纳米 (NLs) 用于在全血中超敏感检测心脏素I (cTnI). 这种新的光学生物传感器实现了低检测极限,使得心血管疾病的早期诊断成为可能.
科学领域:
- 纳米技术纳米技术
- 生物医学工程 生物医学工程
- 光学传感传感器是什么?
背景情况:
- 光学传感器由于信号火和非特异性结合,难以检测全血中分析物的低度.
- 现有的方法通常需要样品预处理或标签,使分析复杂化.
研究的目的:
- 开发一种灵敏,选择性和无标签的光学生物传感器,用于在全血中检测心脏素I (cTnI).
- 为了提高生物传感性能,利用金纳米 (NLs) 和非凡光学传输 (EOT).
主要方法:
- 在芯片上制造金纳米 (NL) 阵列.
- 功能化NL表面的DNA吸收剂用于特定的cTnI结合.
- 通过在近红外 (NIR) 区域中传输的表面等离子体共振 (tSPR) 频谱的变化检测cTnI.
主要成果:
- 在缓冲物 (0.079 ng/mL),人血清 (0.084 ng/mL) 和全血 (0.097 ng/mL) 中达到cTnI的低检测极限.
- 证明高特异性,其他蛋白质和肝素的干扰最小.
- NIR EOT频谱最大限度地减少了来自血液成分的信号灭.
结论:
- 在全血中,NL等离子组为敏感和选择性无标签检测cTnI提供了一个有前途的平台.
- 这项技术有可能发展成为早期心血管疾病 (CVD) 检测的临床诊断工具.
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