基于表面增强拉曼散射的用于人类泪液性痛风关节炎诊断的等离子体 Schirmer 条
Plasmonic Schirmer Strip for Human Tear-Based Gouty Arthritis Diagnosis Using Surface-Enhanced Raman Scattering.
机构信息
Department of Bio and Brain Engineering and KAIST Institute for Optical Science and Technology, Korea Advanced Institute of Science and Technology (KAIST) , 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
出版信息
ACS Nano. 2017 Jan 24;11(1):438-443. doi: 10.1021/acsnano.6b06196. Epub 2016 Dec 16.
Biomarkers in tear fluid have attracted much interest in daily healthcare sensing and monitoring. Recently, surface-enhanced Raman scattering (SERS) has enabled highly sensitive label-free detection of small molecules. However, a highly stable straightforward tear assay with superior sensitivity is still under development in tear collection and analysis. Here we report a plasmonic Schirmer strip for on-demand, rapid, and simple identification of biomarkers in human tears. The diagnostic strip features gold nanoislands directly and evenly formed on the top surface of cellulose fibers, which maintain a hygroscopic nature for an efficient collection of tear production as well as provide plasmonic enhancement in SERS signals for identification of tear molecules. The uric acid in human tears was quantitatively detected at physiological levels (25-150 μM) by using SERS. The experimental results also clearly reveal a strong linear correlation between uric acid level in both human tears and blood for gouty arthritis diagnosis. This functional paper strip enables noninvasive diagnosis of disease-related biomarkers and healthcare monitoring using human tears.
在日常医疗保健传感和监测中,眼内液中的生物标志物引起了广泛关注。最近,表面增强拉曼散射(SERS)实现了对小分子的高灵敏度无标记检测。然而,在眼内液采集和分析中,仍然需要开发一种具有高稳定性和优异灵敏度的简单直接的眼内液分析方法。在这里,我们报告了一种用于按需、快速和简单鉴定人眼内液生物标志物的等离子体 Schirmer 条。该诊断条的特点是金纳米岛直接且均匀地形成在纤维素纤维的顶表面上,这保持了亲水性,可高效采集泪液,同时在 SERS 信号中提供等离子体增强,以鉴定泪液分子。使用 SERS 技术在生理水平(25-150 μM)定量检测人眼内液中的尿酸。实验结果还清楚地表明,痛风性关节炎诊断中,人眼内液和血液中的尿酸水平之间存在很强的线性相关性。这种功能性纸条可以使用人眼内液进行非侵入性疾病相关生物标志物诊断和医疗保健监测。