hydrogen peroxide
hydrogen peroxide
Overview
Hydrogen peroxide (H2O2) is a small, reactive oxygen species that is widely studied in chemistry, biology, and medicine. In living systems, it functions as both a signaling molecule and a mediator of oxidative stress. At low to moderate levels, H2O2 participates in redox signaling; at higher levels, it can damage lipids, proteins, and nucleic acids and contribute to inflammation, tissue injury, and cell death. Because of this dual role, hydrogen peroxide is frequently used experimentally to model oxidative stress in cells and tissues, including neuronal, osteoblastic, and cardiomyocyte systems.
In biomedical research, hydrogen peroxide is also a central substrate and trigger in many catalytic and responsive platforms. Enzyme systems such as Glucose oxidase generate H2O2, while nanozymes, peroxidase-like materials, and Fenton-active metals use it to produce more reactive species such as hydroxyl radicals. This makes H2O2 important in cancer therapy, antibacterial treatment, wound healing, biosensing, and oxidative-stress biology. It is also a key biomarker in pathological states such as cancer, inflammation, diabetic wounds, and other redox-imbalanced conditions.
Recent Publications Focus
Below is a summary of the newest research publications targeting hydrogen peroxide (sorted by publication date).
Recent research has extensively explored hydrogen peroxide as a therapeutic and diagnostic target across multiple biomedical applications. In cancer therapy, H2O2 has emerged as a central component of nanozyme-based platforms that catalytically convert it into reactive oxygen species (ROS) or oxygen to enhance treatment efficacy. Several studies demonstrated that engineered nanoplatforms can catalyze endogenous or exogenous H2O2 to generate abundant hydroxyl radicals through Fenton-type reactions, driving chemodynamic therapy [42384177, 42332425, 42306934, 42300038, 42126988, 42099268, 42054707, 42017828, 41819039]. Additionally, catalase-engineered and copper-based nanomaterials have been developed to convert H2O2 into oxygen, thereby relieving tumor hypoxia and sensitizing hepatocellular carcinoma and oral squamous cell carcinoma to phototherapy and radiotherapy [42332425, 42306934]. These approaches frequently integrate H2O2 metabolism with immunomodulation, enabling strategies such as immunogenic cell death and dendritic cell activation [42332425, 42246518, 42300038].
Hydrogen peroxide has also been leveraged in diverse therapeutic contexts including ferroptosis and cuproptosis-driven antitumor immunity. Engineered microbial nanohybrids and self-cascading copper-based nanoassemblies catalyze endogenous H2O2 via peroxidase-like activity, triggering lipid peroxidation and facilitating copper influx that induces ferroptosis and cuproptosis in multidrug-resistant bacteria and tumor cells [42246518, 42054707]. In diabetic wound healing, iron-doped carbon dot nanozymes with peroxidase-like activity catalyzed H2O2 conversion to bactericidal hydroxyl radicals, achieving over 99% antibacterial efficacy against pathogenic bacteria [42099268]. For bladder cancer, magnetically targeted nanomotors were engineered to catalytically degrade elevated H2O2 levels in the tumor microenvironment while simultaneously generating immunostimulatory agents [41839262].
Hydrogen peroxide has become a critical biomarker and target for diagnostic innovation. Multiple studies developed nanozyme-based sensors that detect H2O2 as a marker of inflammation-associated oxidative stress, with applications ranging from point-of-care cholesterol and glucose monitoring to detection of pathogens such as Pseudomonas aeruginosa and uric acid quantification [42384177, 42263297, 42246701, 41812496, 41621357]. These platforms frequently employ engineered catalysts with enhanced peroxidase-like activity to amplify detection signals; for instance, machine learning-integrated immunoassay platforms achieved 14.58- to 250-fold sensitivity improvements by optimizing nanozyme catalysis of H2O2-driven substrate oxidation compared to natural horseradish peroxidase [42246701].
Complementing therapeutic approaches, research has examined hydrogen peroxide as a key player in oxidative stress-related pathologies and as a substrate for beneficial synthesis. Studies demonstrated that engineered nanomaterials and natural products can protect biomolecules against H2O2-induced oxidative damage, with applications to Alzheimer's disease neuroprotection and enhanced oxidative stress resistance in aging models [42003377, 41901279]. Additionally, photocatalytic systems have been developed to synthesize H2O2 from water and oxygen under light irradiation for downstream aerobic oxidation reactions and sustainable chemical production [41936121]. Together, these studies illustrate hydrogen peroxide's dual role as both a therapeutic agent—when catalytically transformed or accumulated in localized cellular compartments—and a diagnostic target for monitoring disease-relevant oxidative stress, positioning H2O2 as a versatile platform molecule for precision medicine and point-of-care diagnostics.