节点文献

HSA/g-C3N4作为电致化学发光探针检测β-淀粉样蛋白

HSA/g-C3N4 as an Electrochemiluminescent Probe for the Detection of β-Amyloid

  • 推荐 CAJ下载
  • PDF下载
  • 不支持迅雷等下载工具,请取消加速工具后下载。

【作者】 陈孜璇李文杨晓燕

【Author】 CHEN Zixuan;LI Wen;YANG Xiaoyan;College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology;

【通讯作者】 杨晓燕;

【机构】 青岛科技大学化学与分子工程学院

【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-1到100 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7.2 fmol·L-1。并且该传感器具有较高的灵敏度和较好的特异性。

【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 7.2 fmol·L-1. This biosensor also shows good sensitivity and selectivity.

【基金】 山东省自然科学基金项目(ZR20190M051)
  • 【文献出处】 青岛科技大学学报(自然科学版) ,Journal of Qingdao University of Science and Technology(Natural Science Edition) , 编辑部邮箱 ,2023年04期
  • 【分类号】R313;O657.1
  • 【下载频次】5
节点文献中: 

本文链接的文献网络图示:

本文的引文网络