利用斜入射反射率差技术开发用于小分子检测的羧甲基壳聚糖功能化载玻片。

IF 2.9 2区 医学 Q2 BIOCHEMICAL RESEARCH METHODS Biomedical optics express Pub Date : 2024-09-19 eCollection Date: 2024-10-01 DOI:10.1364/BOE.534563
Mengjing Xu, Boyang Shi, Haofeng Li, Xiaohan Mai, Lan Mi, Jiong Ma, Xiangdong Zhu, Guowei Wang, Yiyan Fei
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引用次数: 0

摘要

无标记光学生物传感器已成为研究生物分子相互作用的强大工具,无需标记。高通量和低检测限是快速准确检测生物分子的理想选择。斜入射反射率差分(OI-RD)技术能够在高通量模式下检测成千上万的生物分子相互作用,尤其适用于大于 1000 Da 的生物分子。为了提高 OI-RD 对小分子(通常为
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Development of a carboxymethyl chitosan functionalized slide for small molecule detection using oblique-incidence reflectivity difference technology.

Label-free optical biosensors have become powerful tools in the study of biomolecular interactions without the need for labels. High throughput and low detection limit are desirable for rapid and accurate biomolecule detection. The oblique-incidence reflectivity difference (OI-RD) technique is capable of detecting thousands of biomolecular interactions in a high-throughput mode, specifically for biomolecules larger than 1000 Da. In order to enhance the detection capability of OI-RD for small molecules (typically < 500 Da), we have developed a three-dimensional biochip that utilized carboxymethyl chitosan (CMCS) functionalized slides. By investigating various factors such as sonication time, protein immobilization time, CMCS molecular weight, and glutaraldehyde (GA) functionalization time, we have achieved a detection limit of 6.8 pM for avidin (68 kDa). Furthermore, accurate detection of D-biotin with a molecular weight of 244 Da has also been achieved. This paper presents an effective solution for achieving both high throughput and low detection limits using the OI-RD technique in the field of biomolecular interaction detection.

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来源期刊
Biomedical optics express
Biomedical optics express BIOCHEMICAL RESEARCH METHODS-OPTICS
CiteScore
6.80
自引率
11.80%
发文量
633
审稿时长
1 months
期刊介绍: The journal''s scope encompasses fundamental research, technology development, biomedical studies and clinical applications. BOEx focuses on the leading edge topics in the field, including: Tissue optics and spectroscopy Novel microscopies Optical coherence tomography Diffuse and fluorescence tomography Photoacoustic and multimodal imaging Molecular imaging and therapies Nanophotonic biosensing Optical biophysics/photobiology Microfluidic optical devices Vision research.
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