Glucose oxidase

Overview

Glucose oxidase (GOx, also written GOX or GOD) is a flavoprotein enzyme that catalyzes the oxidation of glucose to D-gluconic acid with the concomitant production of hydrogen peroxide. Because this reaction is highly specific for glucose and generates measurable chemical outputs, glucose oxidase is widely used in biosensing, diagnostic assays, and glucose-responsive therapeutic systems. In biomedical research, it is especially valued as a catalytic component that can amplify signals or trigger downstream reactions through hydrogen peroxide generation and local acidification.

Beyond its analytical role, glucose oxidase is also used as a functional therapeutic enzyme in engineered delivery systems. Recent studies have explored its encapsulation in nanomaterials, metal-organic frameworks, silica nanocapsules, and polymer matrices to improve stability, enable cascade reactions, and support applications in wound healing, cancer therapy, and point-of-care diagnostics. Its activity is often paired with horseradish peroxidase, iron-based materials, or other catalytic components to create self-amplifying or cascade enzyme systems.

Focus of Latest Publications

Recent publications have used glucose oxidase as a central catalytic target in several bioengineering and diagnostic platforms.

One study coencapsulated glucose oxidase and horseradish peroxidase within biocompatible silica nanocapsules using an enzyme-friendly synthesis method. The work focused on enhancing enzyme cascade reactions through silica nanoconfinement, indicating that co-localization of the two enzymes can improve catalytic efficiency and support controlled cascade biochemistry.

In diabetic wound therapy, glucose oxidase was incorporated into a biomineralization nanozyme system. A glucose oxidase-based GOx@CeO2 construct was further coated with a polydopamine nanolayer to form GCPNPs, which were developed for treatment of bacteria-infected diabetic wounds. This design suggests a therapeutic strategy in which glucose oxidase contributes to a local catalytic environment, likely leveraging hydrogen peroxide generation and downstream nanozyme activity to support wound healing.

Glucose oxidase also appeared in a self-amplifying detection strategy for cardiac troponin I (cTnI). In that assay, MOF-conjugated glucose oxidase generated hydrogen peroxide under oxygen, and the resulting acidic microenvironment triggered Fe-MOF breakdown and release of Fe2+. The released iron then participated in a Fenton reaction to etch a protective DNA layer on gold nanoparticles, enabling salt-induced aggregation and dynamic light scattering readout. This illustrates how glucose oxidase can initiate a cascade amplification process in ultrasensitive biomarker detection.

In metabolic engineering, overexpression of the endogenous glucose oxidase gene in Aureobasidium melanogenum was used to create a strain optimized for efficient gluconic acid production. This highlights the enzyme’s direct metabolic role in converting glucose to D-gluconic acid and its relevance to industrial biotechnology.

A separate biosensing study demonstrated single-step aerosol-assisted plasma deposition of glucose oxidase in a poly(ethylene oxide) matrix to create biocomposite films for biosensing applications. This work emphasizes the feasibility of embedding active glucose oxidase into thin-film materials while preserving function for sensor fabrication.

Glucose oxidase was also loaded into porous Cu(II)-doped zinc phosphate@polydopamine nanoparticles, with PEGylation, for triple-combination cancer therapy. In that context, the enzyme was designated as part of Cu-ZnP@GOx/PDA/PEG nanoparticles, indicating use in a therapeutic nanoplatform rather than a conventional diagnostic assay.

In another tumor-marker sensing platform, glucose oxidase was encapsulated within covalent organic frameworks during synthesis of gold nanoparticles/GOx@COFs. The goal was a “near-zero background signal” chronocoulometric assay based on catalytic amplification, showing that glucose oxidase can be integrated into highly sensitive electrochemical detection systems.

A sweet-responsive magnetic metal-organic framework platform for ATP point-of-care testing also used glucose oxidase and magnetic nanoparticles co-encapsulated in amorphous zeolitic imidazole framework-90. Here, glucose oxidase served as part of a glucose-responsive probe system linked to a Personal Glucose Meter readout, with ATP as the model target.

Finally, glucose oxidase-labeled secondary antibodies were used in an ultrasensitive cascade enzyme immunoassay electrochemical microfluidic chip for early prostate cancer screening. This application reflects the enzyme’s long-standing role as a label in sandwich immunoassays, where it supports signal generation and amplification in microfluidic diagnostics.

Across these studies, glucose oxidase was repeatedly used as a catalytic amplifier, a glucose-responsive trigger, or a therapeutic enzyme payload. The recurring themes were hydrogen peroxide generation, cascade reactions, nanoconfinement, and integration with materials such as gold nanoparticles, metal-organic frameworks, polydopamine, silica, and polyethylene glycol.

Key Publications

• Jun Bioinspired catecholamine-derived AuNPs@polynorepinephrine@MWCNT electroactive nanomaterial for real-time monitoring of glucose dynamics. (Mikrochimica acta, 2026, PMID 42307818): "The nanoplatform was deposited on a screen-printed electrode (SPE) with glucose oxidase (GOx) from Aspergillus niger for potential use in point-of-care testing based on a rapid electrocatalytic response to glucose."
• May Enhanced Enzyme Cascade Reactions Through Coencapsulation in Biocompatible Silica Nanoconfinement. (Chembiochem : a European journal of chemical biology, 2026, PMID 42186874): "Here, we coencapsulated glucose oxidase (GOX) and horseradish peroxidase (HRP) within silica nanocapsules (SiNCs) using an enzyme-friendly synthesis method."
• May Self-amplifying cascade-triggered Au NP assembly strategy for ultrasensitive cTnI detection with dynamic light scattering. (Analytical methods : advancing methods and applications, 2026, PMID 42093395): "by O2 under the catalysis of MOF-conjugated GOD and produced H2O2, and the acidic micro-environment triggered the breakdown of Fe-MOF and the release of Fe2+, which reacted with H2O2via the Fenton reaction to etch the protective DNA layer that modified the Au NPs, enabling the salt-induced aggregation of the AuNPs."
• May Biomineralization nanozyme-based biodegradable microneedle for accelerating bacteria-infected diabetic wound healing. (Mikrochimica acta, 2026, PMID 42168679): "Herein, a simple glucose oxidase (GOX) biomineralization nanozyme of GOX@CeO2 was prepared which was further encapsulated with polydopamine (PDA) nanolayer (GOX@CeO2@PDA termed as GCPNPs) for diabetic wounds treatment."
• May Single-Step Aerosol-Assisted Plasma Deposition of Biocomposite Glucose Oxidase/Poly(ethylene oxide) Films for Biosensing Applications. (ACS applied materials & interfaces, 2026, PMID 42021452): "Here, we demonstrate for the first time the single-step deposition of glucose oxidase (GOx) in a poly(ethylene oxide) (PEO) matrix by AAPD with an atmospheric pressure plasma jet."
• May Metabolic Engineering of Aureobasidium melanogenum for Efficient Production of Gluconic Acid. (Journal of agricultural and food chemistry, 2026, PMID 42017485): "Subsequently, overexpression of the endogenous glucose oxidase gene led to the creation of strain PPLMPG-6."
• May Encapsulation of Glucose Oxidase in Porous Cu(II)-Doped Zinc Phosphate@polydopamine Nanoparticles for Triple-Combination Therapy of Cancer. (Molecular pharmaceutics, 2026, PMID 41948866): "...loaded with glucose oxidase (designated as Cu-ZnP@GOx/PDA/PEG NPs) for optimizing therapeutic efficacy."
• May "Near-zero background signal" sensing platform for tumor marker based on catalytic amplification strategy in chronocoulometry. (Talanta, 2026, PMID 41490353): "Specifically, glucose oxidase (GOx) was encapsulated within the covalent organic frameworks (COFs) during the synthetic process of gold nanoparticles (AuNPs)/GOx@COFs."
• May Sweet-responsive magnetic metal-organic framework for point-of-care testing of ATP using personal glucose meter. (Talanta, 2026, PMID 41483604): "Glucose oxidase (GOx) and magnetic nanoparticles (MNPs) were co-encapsulated into the amorphous zeolitic imidazole framework-90 (aZIF-90) to form the probe and adenosine triphosphate (ATP) was chosen as the model target."
• Apr Ultrasensitive Cascade Enzyme Immunoassay Electrochemical Microfluidic Chip for Early Screening of Prostate Cancer. (ACS sensors, 2026, PMID 41924996): "...and glucose oxidase-labeled secondary antibodies conjugating to form stable sandwich immunocomplexes."