应用化学 ›› 2025, Vol. 42 ›› Issue (4): 522-532.DOI: 10.19894/j.issn.1000-0518.240417

• 研究论文 • 上一篇    下一篇

面向生物样品分析的小檗碱的电化学-荧光双模传感器

彭文琪, 周锐, 程旺兴, 张自品()   

  1. 安徽中医药大学药学院,合肥 230012
  • 收稿日期:2024-12-17 接受日期:2025-03-17 出版日期:2025-04-01 发布日期:2025-05-14
  • 通讯作者: 张自品
  • 作者简介:zpzhang@ahtcm.edu.cn

An Electrochemical-Fluorescence Dual-Mode Chemosensor for Berberine Detection in Biological Samples

Wen-Qi PENG, Rui ZHOU, Wang-Xin CHENG, Zi-Pin ZHANG()   

  1. Department of Pharmacy,Anhui University of Chinese Medicine,Hefei 230012,China
  • Received:2024-12-17 Accepted:2025-03-17 Published:2025-04-01 Online:2025-05-14
  • Contact: Zi-Pin ZHANG
  • Supported by:
    the Natural Science Foundation of Anhui Province of China(2008085MH293);the Key Projects of Natural Scientific Research Programs of Universities in Anhui Province(2022AH050459);Anhui Province 2020 Provincial-Level Quality Engineering Project-Analytical Chemistry Massive Open Online Caurse (MOOC) Demonstration Project(2020MOOC265)

摘要:

基于1,3,6-三磺酸8-氨基萘(ANTS)与小檗碱分子间的非共价作用,利用ANTS的荧光性质和电化学活性,以ANTS同时作为小檗碱的识别元件和电化学-荧光双模响应探针,建立了小檗碱的电化学-荧光双模传感器。 利用ANTS与单壁碳纳米管(SWNTs)之间的π-π堆积作用,构建了基于ANTS/SWNTs修饰玻碳(GC)电极的电化学传感器,电化学传感分析采用差分脉冲(DPV)技术、利用ANTS/SWNTs/GC电极在-0.003和+0.074 V的氧化峰电流的下降率之和对小檗碱进行定量分析; 荧光传感分析基于ANTS溶液在517 nm处的荧光强度下降率对小檗碱进行定量分析。 在最优化条件下,电化学传感器对小檗碱的电流响应在0.05~2 μmol/L和2~1000 μmol/L浓度范围内呈现良好的线性关系,检测限为0.013 μmol/L; 荧光传感器对小檗碱的荧光强度响应在1~100 μmol/L浓度范围内呈现良好的线性关系,检测限为0.325 μmol/L。 实际样品测定表明,大鼠血浆和肝脏匀浆中内源性物质对双模传感器的测定均无明显干扰。 电化学传感分析对小檗碱灌胃模型大鼠的血浆和肝脏匀浆测定的相对标准偏差(RSD)分别为3.0%(n=3)和4.0%(n=3); 荧光传感分析对大鼠血浆和肝脏匀浆的加标回收率分别为99.8%~100.2%(n=3)和95.5%~99.9%(n=3)。 该方法有望应用于小檗碱相关的生理和病理事件研究。

关键词: 1, 3, 6-三磺酸8-氨基萘, 小檗碱, 双模传感器, 荧光, 电化学传感器

Abstract:

By taking advantage of the non-covalent interactions between 1,3,6-tri-sulfonate 8-aminonaphthalene (ANTS) and berberine, we have reported a novel electrochemical-fluorescent dual-mode chemosensor for berberine based on using ANTS as both the recognition element for berberine and a dual-mode probe for electrochemical and fluorescent responses. ANTS was immobilized onto the glass carbon (GC) electrode surface via single-walled carbon nanotubes (SWNTs) through π-π interactions to generate the ANTS/SWNTs/GC electrode. Upon being immersed in berberine solution, the ANTS/SWNTs-modified GC electrode shows current decreases in the oxidation peaks at both -0.003 V and +0.074 V(vs.Ag/AgCl) due to the interaction-driven adsorption of berberine on the electrode surface, which validates berberine detection using the sum of the ratios of current decreases in two oxidation peaks as the electrochemical signal readout. Upon addition of berberine into ANTS solution, ANTS emission shows a turn-off signal at 517 nm, which enables the berberine quantification using the decrease in ANTS emission at 517 nm as the fluorescent readout. Under the optimized conditions, the ANTS-based electrochemical sensor shows current decrease response to berberine in the dynamic range from 0.05 to 1000 μmol/L with a detection limit of 0.013 μmol/L, and the fluorescent sensor shows linear fluorescent response to berbeine within a concentration range of 1~100 μmol/L with a detection limit of 0.325 μmol/L. In the animal experiments, the dual-mode chemsensor has demonstrated a high selectivity against the endogenous species coexisting in rat plasma and liver homogenerates. Moreover, the electrochemical sensor is remarkably sensitive for berberine level quantification in rat plasma and liver homogenates, wherein the relative standard deviations (RSDs) for the plasma and liver homogenates measurements are 3.0% (n=3) and 4.0% (n=3), respectively. The fluorescent sensor has achieved satisfactory spike-and-recoveries within 99.8%~100.2% (n=3) for plasma and 95.5%~99.9% (n=3) for liver homogenates. The dual-mode chemosensor reported here is readily accessible, simple, robust, and cost-effective and offers a promising tool for rapid detection of berberine in biological samples with less technically demanding and simple operating procedures.

Key words: 1, 3, 6-Tri-sulfonate 8-aminonaphthalene, Berberine, Dual-readout sensor, Fluorescence, Electrochemical sensor

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