分子印迹聚合物
三肽
万古霉素
肽
检出限
化学
色谱法
胶体金
安培法
组合化学
电极
电化学
材料科学
纳米颗粒
选择性
有机化学
纳米技术
生物化学
细菌
催化作用
物理化学
生物
遗传学
金黄色葡萄球菌
作者
Feng Tan,Mingyan Zhai,Xuejie Meng,Yan Wang,Hongxia Zhao,Xiaochun Wang
标识
DOI:10.1016/j.bios.2021.113220
摘要
A hybrid recognition interface combining peptide and molecularly imprinted polymer (MIP) was achieved by introducing a vancomycin binding tripeptide in the preparation of MIP to implement high affinity and specificity recognition of vancomycin in complex matrices. The tripeptide that can specifically bind vancomycin was immobilized onto gold nanoparticles (GNPs) deposited on a glassy carbon electrode (GCE) by Au–S bond, and then a controlled electropolymerization of dopamine was carried out to imprint the vancomycin-peptide complex. After removing vancomycin from the polydopamine (PDA), hybrid peptide-MIP cavities containing multiple binding sites for vancomycin in the MIPDA/peptide/GNPs/GCE were obtained. The electrode had better selectivity and higher sensitivity toward vancomycin than either peptide or MIP modified GNPs/GCE, and the limit of quantification was as low as 10 pM by electrochemical impedance spectroscopy. The real samples, including fetal calf serum, probiotic drink and honey spiked with 0.17–2.0 μM vancomycin were analyzed on the MIPDA/peptide/GNPs/GCE, with the recoveries of 92.16–104.67%. The present study provides a sensitive, reliable method for the detection of vancomycin in complex matrices. • A hybrid peptide-molecularly imprinted polymer interface was developed. • The hybrid recognition interface had excellent affinity and specificity. • Highly sensitive detection of vancomycin was achieved by electrochemical detection. • The method was able to detect vancomycin as low as 10 pM.
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