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文章编号: 1672-6987(2025)04-0021-08DOI: 10.16351/j.1672-6987.2025.04.003
侯倩倩, 丁彩凤*(青岛科技大学 化学与分子工程学院, 山东 青岛 266042)
摘要: 为了检测复杂样品中的生物标志物,最根本的是要避免非特异性吸附杂质,如蛋白质,以提高生物传感器的选择性。提出了一种基于牛血清白蛋白(BSA)水凝胶和外切酶Exo Ⅲ介导的核酸循环信号放大策略的敏感的防污电化学发光生物传感器。Ti3C2Tx-NH4具有较大的表面积和较高的金属导电性,它与BSA交联以提高传感界面的导电性,由于BSA水凝胶的电中性和良好的亲水性,它显示了出色的防污性能。基于Exo Ⅲ和DNA杂交链反应的循环扩增策略明显放大了电化学发光信号,提高了p53的检测灵敏度。该生物传感器的线性范围为1~1×106 fmol · L-1,检测限为0.26 fmol · L-1。更重要的是,当该传感器用于检测血清等真实样品中的p53时,显示出极好的选择性。因此,这种独特的防污传感界面有望在临床诊断和生物病理学分析中构建各种电化学生物传感器。
关键词: 电化学发光生物传感器; Ti3C2Tx-NH4; 牛血清白蛋白; 防污
中图分类号: O 65 文献标志码: A
引用格式: 侯倩倩, 丁彩凤. 基于牛血清白蛋白水凝胶和信号放大的抗污染ECL生物传感器用于检测DNAp53[J]. 青岛科技大学学报(自然科学版), 2025, 46(4): 21-28.
HOU Qianqian, DING Caifeng. Antifouling ECL biosensor based on bovine serum albumin hydrogel and signal amplification for the detection of p53[J]. Journal of Qingdao University of Science and Technology(Natural Science Edition), 2025, 46(4): -.
Antifouling ECL Biosensor Based on Bovine Serum Albumin Hydrogel and Signal Amplification for the Detection of p53
HOU Qianqian, DING Caifeng(College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)
Abstract: To detect biomarkers in complex samples, it is fundamental to avoid the non-specific adsorption of impurities, such as proteins, to improve the selectivity of biosensors. In this study, a sensitive anti-fouling electrochemiluminescence biosensor was proposed based on bovine serum albumin (BSA) hydrogel and exonuclease exo Ⅲ mediated nucleic acid cycle signal amplification strategy. Ti3C2Tx-NH4, which has large surface area and high metal conductivity, was crosslinked with BSA to improve the conductivity of the sensing interface, which shows antifouling performance excellently due to the electrical neutrality and good hydrophilicity of BSA hydrogel. The cyclic amplification strategy based on Exo Ⅲ and DNA hybridization chain reaction significantly amplified the electrochemiluminescence signal and improved the sensitivity of p53 detection. The linear range of the biosensor is 1—1×106 fmol · L-1 with the detection limit of 0.26 fmol · L-1. More important, the sensor shows excellent selectivity when it was used to detect p53 in real samples, such as serum. Thus, this unique antifouling sensing interface is expected to construct various electrochemical biosensors in clinical diagnosis and biopathological analysis.
Key words: electrochemiluminescence biosensor; Ti3C2Tx-NH4; bovine serum albumin; antifouling
收稿日期: 2024-08-21
基金项目: 山东省自然科学基金项目(ZR2020MB065).
作者简介: 侯倩倩(1997—), 女, 硕士研究生. * 通信联系人.