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HSA/g-C3N4作为电致化学发光探针检测β-淀粉样蛋白

作者:时间:2023-08-30点击数:

全文下载: 202304004.pdf


文章编号: 1672-6987202304-0034-07 DOI 10.16351/j.1672-6987.2023.04.004


陈孜璇, 李文, 杨晓燕*(青岛科技大学 化学与分子工程学院, 山东 青岛 266042)


摘要: 采用一步煅烧法制备了一种电致化学发光(ECL)性能良好的类石墨相-碳化氮二维纳米材料(g-C3N4),经1-3-二甲氨基丙基)-3-乙基碳二亚胺盐酸盐和N-羟基琥珀酰亚胺活化后,g-C3N4与人血清白蛋白(HSA)复合,得到HSA/g-C3N4复合材料。利用Aβ与HSA的结合作用,将HSA/g-C3N4与不同浓度的β-淀粉样蛋白(Aβ)孵育,形成Aβ/HSA/g-C3N4。同时将巯基修饰的Aβ适体固定在金电极表面,通过适体与靶标的特异性结合,可以将Aβ/HSA/g-C3N4捕获到电极上。在共反应剂K2S2O8存在下,该传感器实现了对Aβ的ECL灵敏检测。研究表明,在10 fmol·L-1100 nmol·L-1范围内,ECL强度与Aβ浓度具有良好线性关系,检出限低至72 fmol·L-1。并且该传感器具有较高的灵敏度和较好的特异性。


关键词: 电致化学发光; 类石墨相-碳化氮; 人血清白蛋白; β-淀粉样蛋白


中图分类号: O 657.15文献标志码: A

引用格式: 陈孜璇, 李文, 杨晓燕. HSA/g-C3N4作为电致化学发光探针检测β-淀粉样蛋白[J. 青岛科技大学学报(自然科学版), 2023, 44(4): 34-40.


CHEN Zixuan, LI Wen, YANG Xiaoyan. HSA/g-C3N4 as an electrochemiluminescent probe for the detection of β-amyloidJ. Journal of Qingdao University of Science and TechnologyNatural Science Edition), 2023 444): 34-40.


HSA/g-C3N4 as an Electrochemiluminescent

Probe for the Detection of β-Amyloid


CHEN Zixuan, LI Wen, YANG Xiaoyan

(College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)


Abstract: In this work, two-dimensional graphite-like carbon nitride (g-C3N4), as an effective electrochemiluminescence (ECL) substrate, was prepared by one step calcination method. And human serum albumin (HSA) could bind to g-C3N4 to form HSA/g-C3N4 complexes after g-C3N4 was activated by using 1-ethyl-3-(3-(dimethylamino) propyl) carbodiimide hydrochloride and N-hydroxysuccinimide. After incubating with amyloid-β (Aβ), Aβ was bound with HSA to form Aβ/HSA/g-C3N4 complexes via HSA-Aβ interaction. Subsequently, the thiol-functionalized DNA aptamer, as the specific recognition element for Aβ peptide, was assembled on the gold electrode via Au-S interaction. The forming Aβ/HSA/g-C3N4 complexes were then anchored on the electrode through the specific recognition between the target Aβ and the aptamer. Under the optimized conditions, the present ECL sensor reveals a good linear response to Aβ peptide ranging from 10 fmol·L-1 to 100 nmol·L-1 with a detection limit of 72 fmol·L-1. This biosensor also shows good sensitivity and selectivity.


Key words: electrochemiluminescent; graphite-like carbon nitride; human serum albumin; amyloid-β


收稿日期: 2022-08-03

基金项目: 山东省自然科学基金项目(ZR20190M051.

作者简介: 陈孜璇 (1997), , 硕士研究生.*通信联系人.













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