Using poly(3-aminophenylboronic acid) thin film with binding-induced ion flux blocking for amperometric detection of hemoglobin A1c
Journal
Biosensors and Bioelectronics
Journal Volume
63
Pages
317-324
Date Issued
2015
Author(s)
Abstract
This study reports a novel enzyme-free, label-free amperometric method for direct detection of hemoglobin A1c (HbA1c), a potent biomarker for diabetes diagnosis and prognosis. The method relies on an electrode modified with poly(3-aminophenylboronic acid) (PAPBA) nanoparticles (20-50nm) and a sensing scheme named "binding-induced ion flux blocking." The PAPBA nanoparticles were characterized by FT-IR, XPS, TEM, and SEM. Being a polyaniline derivative, PAPBA showed an ion-dependent redox behavior, in which insertion or extraction of ions into or out of PABPA occurred for charge balance during the electron transfer process. The polymer allowed HbA1c selectively bound to its surface via forming the cis-diol linkage between the boronic acid and sugar moieties. Voltammetric analyses showed that HbA1c binding decreased the redox current of PAPBA; however, the binding did not alter the redox potentials and the apparent diffusivities of ions. This suggests that the redox current of PAPBA decreased due to an HbA1c binding-induced ion flux blocking mechanism, which was then verified and characterized through an in situ electrochemical quartz crystal microbalance (EQCM) study. Assay with HbA1c by differential pulse voltammetry (DPV) indicates that the peak current of a PAPBA electrode has a linear dependence on the logarithm of HbA1c concentration ranging from 0.975 to 156μM. The HbA1c assay also showed high selectivity against ascorbic acid, dopamine, uric acid, glucose and bovine serum albumin. This study has demonstrated a new method for developing an electrochemical HbA1c biosensor and can be extended to other label-free, indicator-free protein biosensors based on a similar redox polymer electrode. ? 2014 Elsevier B.V.
Subjects
Diabetes; Electrochemical biosensors; Ion flux; Poly(3-aminophenylboronic acid)
SDGs
Other Subjects
Biosensors; Hemoglobin; Ions; Medical problems; Nanoparticles; Organic acids; Polyaniline; Redox reactions; Voltammetry; Ascorbic acid; Biosensors; Body fluids; Electrodes; Electron transport properties; Hemoglobin; Ions; Medical problems; Nanoparticles; Organic acids; Polyaniline; Quartz; Quartz crystal microbalances; Redox reactions; Voltammetry; 3-Aminophenylboronic acid; Amperometric detection; Differential pulse voltammetry; Electrochemical biosensor; Electrochemical quartz crystal microbalance; Electron transfer process; Ion fluxes; Polyaniline derivatives; Electrochemical electrodes; Electrochemical electrodes; aniline derivative; ascorbic acid; bovine serum albumin; dopamine; glucose; hemoglobin A1c; nanoparticle; poly(3 aminophenylboronic acid); unclassified drug; uric acid; ascorbic acid; bovine serum albumin; dopamine; glucose; hemoglobin A1c; nanoparticle; poly(3 aminophenylboronicacid); polyaniline; uric acid; 3-aminobenzeneboronic acid; boronic acid derivative; glycosylated hemoglobin; hemoglobin A1c protein, human; polymer; amperometric biosensor; article; binding affinity; binding site; biofilm; chemical analysis; chemical structure; concentration (parameters); controlled study; differential pulse voltammetry; electrochemical detection; electron transport; infrared spectroscopy; ion current; molecular dynamics; oxidation reduction potential; protein binding; quartz crystal microbalance; scanning electron microscopy; sensitivity analysis; separation technique; surface property; transmission electron microscopy; X ray photoelectron spectroscopy; amperometry; Article; binding induced ion flux blocking; electrode; film; label free amperometric method; limit of detection; limit of quantitation; novel enzyme free amperometric method; oxidation reduction reaction; potentiometry; blood; chemistry; diabetes mellitus; genetic procedures; human; isolation and purification; procedures; Bovinae; Biosensing Techniques; Boronic Acids; Diabetes Mellitus; Hemoglobin A, Glycosylated; Humans; Nanoparticles; Polymers; Spectroscopy, Fourier Transform Infrared
Type
journal article