Technical articles
Antioxidant Enzyme Networks in Skin Cells and Their Applications in Skincare and Cosmetics
Antioxidant Enzyme Networks in Skin Cells and Their Applications in Skincare and Cosmetics
The skin is chronically exposed to multiple oxidative environments, including ultraviolet radiation, air pollution, ozone, visible light, and endogenous metabolic stress. The key to maintaining cutaneous homeostasis does not lie in a single antioxidant ingredient, but in a continuous defense network jointly constituted by superoxide dismutase, catalase, glutathione peroxidase, peroxiredoxins, the thioredoxin system, and the glutathione cycle. Skincare and cosmetic design centered on this network can advance product development beyond the simple concept of chemical scavenging toward a mechanistic level involving oxidative stress regulation, barrier homeostasis maintenance, photoaging protection, and preservation of tissue function.
Keywords: skin cells; antioxidant enzymes; superoxide dismutase; catalase; glutathione peroxidase; Nrf2; photoaging; barrier homeostasis; skincare; cosmetics
I. Biological Basis of Oxidative Stress and Antioxidant Enzyme Networks in Skin
1.1 Sources of cutaneous oxidative stress are persistent and multifactorial
(1) Exogenous exposure continuously drives reactive oxygen species generation
Ultraviolet radiation is one of the most important exogenous drivers of oxidative stress in skin. In addition to UV exposure, ozone, particulate matter, high-energy visible light, and smoking-related pollutants can also increase the reactive oxygen species burden in keratinocytes, fibroblasts, and melanocytes through lipid peroxidation, mitochondrial electron transport imbalance, and amplification of inflammatory signaling. Oxidative stress is therefore not merely an accompanying phenomenon of occasional skin injury, but a persistent pressure under long-term environmental exposure.
(2) Endogenous metabolism also constitutes a source of oxidative burden
The mitochondrial respiratory chain, NADPH oxidases, peroxisomal lipid oxidation, and oxidative folding in the endoplasmic reticulum can all generate reactive oxygen species during normal metabolic activity. Accordingly, skin does not develop oxidative challenges only under external stimulation, but continuously exists under redox balance regulation even in the physiological state.
1.2 The consequences of oxidative stress are multilayered
(1) Lipids, proteins, and DNA can all become targets of oxidative attack
Accumulation of reactive oxygen species can induce membrane lipid peroxidation, protein carbonylation, oxidative DNA damage, and mitochondrial dysfunction, thereby promoting upregulation of inflammatory mediators, activation of cellular senescence programs, and matrix degradation.
(2) Oxidative stress is cross-coupled with inflammation, pigmentation, and barrier homeostasis
Oxidative stress not only causes molecular damage, but can also amplify inflammatory responses, disturb pigmentation-related pathways, and weaken stratum corneum lipid order and barrier repair efficiency. Consequently, phenotypes such as photoaging, skin sensitivity, uneven pigmentation, and barrier fragility are all closely associated with redox imbalance.
1.3 Different skin cell types depend on antioxidant networks in distinct ways
(1) Keratinocytes emphasize frontline defense and barrier maintenance
Keratinocytes are positioned at the front line of environmental exposure. Their antioxidant enzyme profile is highly relevant to UV stress, pollution exposure, and barrier recovery, making them one of the core models for evaluating the antioxidant capacity of skincare actives.
(2) Fibroblasts emphasize matrix homeostasis and repair capacity
Oxidative stress in dermal fibroblasts can promote collagen degradation, elastic fiber disorganization, and upregulation of matrix metalloproteinases. Their antioxidant network status is therefore closely linked to photoaging and tissue laxity.
(3) Melanocytes emphasize dual balance between oxidation and pigmentation
Melanocytes themselves undergo redox fluctuation during melanogenesis. If antioxidant capacity is insufficient, ultraviolet-induced pigmentation responses, post-inflammatory hyperpigmentation, and stress-related cell injury are more likely to occur.
II. Composition and Coupling Mechanisms of the Skin Antioxidant Enzyme Network
2.1 The SOD-CAT-GPx axis constitutes the first enzymatic clearance layer
(1) Superoxide dismutase is responsible for front-end dismutation
SOD1 is mainly distributed in the cytosol, SOD2 is primarily localized in mitochondria, and SOD3 is more abundant in extracellular compartments. Together, they are responsible for superoxide anion clearance and determine the subsequent hydrogen peroxide burden and the workload imposed on CAT and GPx systems.
(2) Catalase and glutathione peroxidase are responsible for downstream degradation
CAT has high hydrogen peroxide-processing capacity and is suited to conditions of stronger oxidative burden. GPx, in addition to processing hydrogen peroxide, can also reduce lipid peroxides, and is therefore more closely related to membrane lipid stability and barrier protection. In skin, this continuous enzymatic chain determines whether reactive oxygen species can be maintained within a controllable range.
2.2 Glutathione, thioredoxin, and peroxiredoxin systems provide downstream buffering
(1) The glutathione cycle maintains broad-spectrum reducing capacity
The GSH/GSSG cycle provides the reducing substrate for glutathione peroxidase, glutathione reductase is responsible for GSH regeneration, and glutathione transferases participate in detoxification of electrophiles and oxidative products. This system supports both peroxide clearance and the recovery capacity of skin under stress.
(2) The Trx/TrxR system regulates protein thiol homeostasis
The thioredoxin system not only participates in peroxide clearance, but also regulates protein disulfide status and redox signal transduction, and is therefore important for cell survival, stress recovery, and transcriptional regulation.
(3) The Prx system mediates fine control of peroxides
Peroxiredoxins are highly sensitive to low levels of peroxides, and thus function not only as components of the clearance system, but also as regulators of redox signaling. If emphasis is placed only on front-end dismutation and degradation while neglecting the downstream reducing systems, the antioxidant network cannot sustain stable functional output.
2.3 Nrf2 is the core transcriptional regulatory axis of the antioxidant enzyme network
(1) Nrf2 coordinates expression of multiple antioxidant and detoxification enzymes
After activation, Nrf2 can upregulate HO-1, NQO1, GST, glutathione-related enzymes, and multiple redox enzymes. Its significance therefore lies not in regulation of a single enzyme, but in driving enhancement of network-level stress defense.
(2) Skincare active design is better centered on induction of endogenous enzyme networks
Compared with direct supplementation of a single enzyme, enhancing endogenous antioxidant capacity in skin by regulating Nrf2 and its downstream network is more consistent with the logic of skin homeostasis maintenance and is more favorable for establishing multilayered defense under continuous environmental exposure.
Table 1. Core Components of the Skin Cell Antioxidant Enzyme Network and Their Skincare Relevance
Enzyme or Regulatory Axis | Main Localization | Main Target | Main Functional Role | Relevance to Skincare and Cosmetics |
SOD1/SOD2/SOD3 | Cytosol, mitochondria, extracellular space | Superoxide anion | Initial dismutation and clearance | Photo-damage defense and maintenance of redox homeostasis |
Catalase (CAT) | Peroxisomes and related compartments | Hydrogen peroxide | High-throughput peroxide clearance | Reduction of post-UV oxidative burden and irritation-related responses |
Glutathione peroxidase (GPx) | Cytosol, mitochondria | Hydrogen peroxide, lipid peroxides | Peroxide clearance and membrane lipid protection | Barrier lipid stability and photoaging control |
Glutathione reductase (GR) | Cytosol, mitochondria | GSSG | Regeneration of GSH | Maintenance of glutathione cycle efficiency |
Glutathione transferase (GST) | Cytosol | Electrophiles and oxidative products | Detoxification and conjugation-mediated clearance | Pollution protection and irritation mitigation |
Peroxiredoxins (Prx) | Cytosol, mitochondria | Peroxides | Fine peroxide clearance | Redox signal buffering and control of low-level ROS |
Thioredoxin/Thioredoxin reductase (Trx/TrxR) | Cytosol, mitochondria | Protein disulfides and peroxide-related substrates | Thiol homeostasis and signaling regulation | Stress recovery and support of cell survival |
NQO1/HO-1 | Cytosol | Quinones and oxidative stress-related substrates | Antioxidant and cytoprotective functions | Stress defense and enhancement of tolerance |
Nrf2 | Transcriptional regulatory level | Genes encoding antioxidant and detoxification enzymes | Network-level inducible regulation | Important mechanistic target for screening skincare actives |
III. Relationship Between the Antioxidant Enzyme Network and Major Skincare Efficacy Directions
3.1 Photoaging protection
(1) The antioxidant enzyme network determines buffering capacity against ultraviolet injury
After ultraviolet exposure, ROS accumulation can promote collagen degradation, elastic fiber disorganization, and upregulation of inflammatory mediators. If SOD, CAT, GPx, and downstream reducing systems respond inadequately, photodamage is more likely to progress from transient stress to persistent aging signaling.
(2) Anti-photoaging strategies should adopt a composite mechanistic framework
A more mechanistically complete anti-photoaging strategy should include exogenous protection, support of endogenous antioxidant enzyme networks, inflammatory control, and matrix preservation, rather than relying only on a single antioxidant small molecule.
3.2 Barrier repair and care for sensitive skin
(1) Oxidative stress directly affects stratum corneum lipids and epidermal homeostasis
Accumulation of peroxides and lipid peroxidation products can disrupt the ordered structure of stratum corneum lipids, increase transepidermal water loss and irritant sensitivity, and prolong the barrier repair cycle. Glutathione systems and GPx-related pathways are particularly important in this process.
(2) Sensitive skin care should focus more on restoration of redox homeostasis
For products targeting sensitive skin, reduction of stinging or erythema is only a phenotypic outcome. A more mechanistically meaningful approach is to reduce peroxide burden, attenuate inflammatory amplification, and restore endogenous antioxidant enzyme networks.
3.3 Skin tone uniformity and pigmentation management
(1) Oxidative stress is tightly coupled to pigmentary responses
Ultraviolet radiation and inflammation can promote activation of pigmentation-related pathways through ROS. Stabilization of the antioxidant enzyme network therefore helps reduce post-inflammatory hyperpigmentation and light-induced pigment imbalance.
(2) Brightening strategies are better integrated with glutathione-related networks
Decline in glutathione levels affects keratinocyte turnover and fibroblast function, and is also associated with reduced regenerative capacity and skin aging under oxidative stress. Managing skin tone uniformity through the glutathione network is more systemic than simply suppressing pigment production.
3.4 Soothing and inflammation-related care
(1) Oxidative stress can amplify inflammatory signaling
Reactive oxygen species not only cause molecular injury, but can also enhance inflammatory factor expression, increase receptor sensitivity, and promote vascular responses. They therefore act upstream in the amplification of irritation.
(2) Strengthening antioxidant enzyme networks helps reduce inflammatory amplification
In development of soothing products, if synchronized regulation of Nrf2 and downstream enzyme systems, ROS burden, and inflammatory markers can be demonstrated, the mechanistic integrity of the product is stronger.
IV. Major Application Pathways in Skincare and Cosmetics
4.1 Direct enzyme supplementation pathway
(1) Natural enzyme materials can serve as the basis of functional actives
Enzymes such as SOD and CAT, or fermentation-derived enzymatic activity fractions, may be used as antioxidant functional raw materials in formulation development. Their theoretical basis lies in supplementing or mimicking exogenous antioxidant capacity for the skin.
(2) The key limitation of this pathway lies in activity preservation and delivery efficiency
Natural enzymes generally have relatively large molecular size and are sensitive to temperature, pH, ionic strength, and interfacial conditions in formulations, and their transcutaneous delivery capacity is limited. Therefore, direct addition of enzymes does not mean effective enzymatic action can be established within skin, and evaluation of this pathway must be based on activity preservation and formulation stability.
4.2 Nanozyme and enzyme-like activity pathway
(1) Enzyme-mimetic materials can improve system stability
Inorganic or nanomaterials with SOD-like, CAT-like, or GPx-like activity may theoretically provide more stable antioxidant capacity and improve formulation tolerance.
(2) The focus of this pathway lies in safety and regulatory boundaries
For cosmetic applications, particle size, surface chemistry, potential irritation, long-term exposure safety, and regulatory compatibility of enzyme-mimetic materials all require full evaluation. Their value is therefore more strongly reflected at the level of high-performance delivery and materials research.
4.3 Endogenous enzyme network induction pathway
(1) This pathway is more consistent with the logic of skin homeostatic regulation
Enhancing the skin’s own antioxidant enzyme expression through activation of Nrf2 and related transcriptional regulatory axes is generally more consistent with skin physiology than direct supplementation with a single enzyme.
(2) Multiple classes of actives can be incorporated into this pathway
Polyphenols, sulfur-containing actives, certain vitamin-like actives, and fermentation-derived active fractions may all function by upregulating endogenous enzyme networks. This pathway is particularly suitable for integration into anti-aging, soothing, and daytime protection products.
4.4 Delivery optimization pathway
(1) Delivery systems determine accessibility and stability of active materials
Liposomes, nanolipid vesicles, and microencapsulation systems can protect antioxidant actives from degradation and improve their delivery efficiency into the stratum corneum and epidermis.
(2) Delivery optimization should serve specific target sites
If the goal is protection of the stratum corneum and epidermis, emphasis should be placed on retention and sustained release. If the goal involves fibroblast protection and improvement of photoaging, deeper delivery potential and safety boundaries must also be considered.
Table 2. Major Application Pathways of the Skin Cell Antioxidant Enzyme Network in Skincare and Cosmetics
Application Direction | Main Mechanism | Key Enzymes or Regulatory Axis | Common Development Strategy | Common Evaluation Indicators |
Photoaging protection | Reduces UV-induced ROS and lipid peroxidation | SOD, CAT, GPx, Nrf2 | Sunscreen plus antioxidant systems, daytime protection systems, repair serums | ROS levels, MDA, 4-HNE, collagen-related indicators |
Barrier repair | Controls peroxide burden and maintains lipid homeostasis | CAT, GPx, GSH system, Prx | Soothing repair creams, barrier serums, fermentation-based active systems | TEWL, stratum corneum hydration, erythema index, CAT activity |
Anti-aging | Reduces matrix degradation induced by oxidative stress | SOD, GPx, Nrf2, HO-1 | Anti-aging serums, creams, composite antioxidant formulations | ROS, MMP-related indicators, elasticity and wrinkle parameters |
Skin tone uniformity and radiance management | Alleviates inflammation-associated oxidation and pigment imbalance | GSH system, Nrf2, Trx system | Brightening serums, antioxidant ampoules, polyphenol combination systems | Melanin-related indicators, evaluation of post-inflammatory pigmentation, brightness parameters |
Sensitive skin care | Buffers oxidative stress and reduces irritation responses | CAT, GPx, Prx, Nrf2 | Low-irritation repair formulations, barrier-support formulations | Erythema, skin response threshold, inflammatory factors, stratum corneum integrity |
V. Technical Priorities in Formulation Development and Efficacy Evaluation
5.1 Formulation stability determines whether the antioxidant concept is technically valid
(1) Natural enzyme systems must first solve the problem of activity retention
Temperature, pH, ionic strength, preservative systems, and interfacial environments can all affect natural enzyme activity. Without evidence of activity preservation and long-term stability, using “contains a certain enzyme” as a product selling point has limited technical meaning.
(2) Induction-type actives must also establish a mechanistic closed loop
For Nrf2-inducing actives, chemical scavenging experiments alone are insufficient. Validation should also include enzyme expression, enzyme activity, ROS readouts, and downstream inflammatory markers in cell-based models.
5.2 Efficacy evaluation should not remain limited to single free-radical scavenging assays
(1) Chemical antioxidant assays reflect only part of reactive capacity
Methods such as DPPH, ABTS, and ORAC may be used for preliminary screening of raw materials, but they do not directly represent regulatory capacity over enzyme networks at the cellular level, nor can they be directly extrapolated to actual skin efficacy.
(2) More explanatory evaluation should proceed to cellular, tissue, and human levels
At the cellular level, emphasis should be placed on activity or expression of SOD, CAT, GPx, NQO1, HO-1, together with ROS, lipid peroxidation, and inflammatory readouts. Tissue models and human studies should further cover endpoints such as barrier function, erythema, radiance, fine lines, and skin tone uniformity.
Table 3. Evaluation Hierarchy of Efficacy Related to the Skin Antioxidant Enzyme Network
Evaluation Level | Main Evaluation Content | Common Indicators |
Chemical level | Preliminary screening of antioxidant activity | DPPH, ABTS, ORAC, inhibition of lipid peroxidation |
Cellular level | Enzyme network regulation and protection from damage | SOD, CAT, GPx activity or expression, ROS, MDA, inflammatory factors |
Tissue level | Integrated epidermal-dermal response | Barrier integrity, collagen-related indicators, tissue oxidative damage markers |
Human level | Visible efficacy and tolerability | Erythema, TEWL, brightness, fine lines, elasticity, skin tone uniformity |
VI. Aladdin-Related Products
6.1 Commonly Used Products for Research on Skin Cellular Antioxidant Enzyme Networks and Skincare Development
Name | CAS No. | Experimental Step | Key Use | Notes for Use |
Superoxide dismutase (SOD) | Direct enzyme supplementation and enzyme activity studies | Used to construct exogenous antioxidant enzyme supplementation systems and evaluate SOD-related scavenging capacity and skin-protective effects | Suitable for studies on cellular antioxidation, photodamage, and formulation stability | |
Catalase | Hydrogen peroxide clearance studies | Used to verify the effects of reduced hydrogen peroxide burden on skin cell injury and inflammatory amplification | Suitable for use with H2O2-induced models | |
Glutathione reductase | Glutathione cycle studies | Used to analyze GSH regeneration efficiency and the sustained output capacity of the antioxidant network | Suitable for use with GSH/GSSG ratio assays | |
Glutathione S-transferase | Detoxification and pollution protection studies | Used to analyze the binding and clearance capacity for electrophiles, lipid peroxidation byproducts, and pollution-related oxidative products | Suitable for combined analysis with pollution exposure models, 4-HNE, and GSH consumption readouts | |
Thioredoxin reductase | Trx system studies | Used to analyze the role of the thioredoxin system in skin redox homeostasis and stress repair | Suitable for use together with Trx- and Prx-related systems | |
Glutathione (GSH) | Antioxidant buffering validation | Used to evaluate the reducing capacity of skin cells, inhibition of lipid peroxidation, and recovery from oxidative injury | Suitable for use with ROS, MDA, and GSH/GSSG assays | |
Oxidized glutathione (GSSG) | Redox state analysis | Used to construct or assess redox imbalance states | Commonly used together with GSH to evaluate overall antioxidant capacity | |
N-Acetyl-L-cysteine (NAC) | Antioxidant intervention | Used as a GSH precursor and reducing intervention agent to validate the reversibility of oxidative stress-related phenotypes | Commonly used in UV, pollution, and inflammation models | |
L-Cysteine | GSH precursor supply studies | Used to analyze the effects of sulfur-containing substrate supplementation on antioxidant capacity and barrier lipid protection in skin cells | Attention should be paid to its susceptibility to oxidation in solution | |
Ergothioneine | Long-acting antioxidant protection studies | Used to evaluate the buffering effects of sulfur-containing natural antioxidants on mitochondrial oxidative stress and photodamage | Suitable for use with Nrf2, ROS, and mitochondrial function readouts | |
α-Lipoic acid | Redox regulation and anti-aging studies | Used to evaluate support of redox cycling and synergistic anti-glycation and antioxidant effects | Suitable for anti-aging and photodamage models | |
Dihydrolipoic acid | Enhanced reducing-state studies | Used to analyze the effects of a stronger reducing environment on lipid peroxidation and protein oxidation | Suitable for mechanistic studies and should not be directly equated with routine formulation applications | |
Coenzyme Q10 | Mitochondrial antioxidant studies | Used to evaluate roles related to mitochondrial electron transport and protection against oxidative injury | Suitable for use with membrane potential, mitochondrial ROS, and photoaging models | |
Curcumin | Nrf2 and inflammation crosstalk studies | Used to evaluate coordinated regulation of antioxidation, anti-inflammation, and pigmentation stress | Suitable for photoaging, inflammation, and brightening studies | |
Resveratrol | Antioxidant and anti-aging studies | Used to analyze Sirtuin-related protection and regulation of the antioxidant enzyme network | Suitable for anti-aging and photodamage models | |
Ferulic acid | Photoprotection synergy studies | Used to enhance antioxidant systems and alleviate UV-induced lipid peroxidation | Suitable for combination studies with VC- and VE-type ingredients | |
Chlorogenic acid | Plant polyphenol antioxidant studies | Used to evaluate the effects of polyphenolic actives on ROS, inflammation, and antioxidant enzyme expression | Suitable for soothing and pollution-protection applications | |
Gallic acid | Polyphenol antioxidant mechanism studies | Used to analyze free-radical scavenging and induction of antioxidant enzyme expression | Suitable for preliminary screening and cell-based validation | |
EGCG | Photoaging and inflammation studies | Used to study regulation of Nrf2, inflammatory factors, and MMP-related indicators by polyphenols | Suitable for anti-aging and brightening-related models | |
Quercetin | Oxidative stress and inflammation models | Used to evaluate the dual inhibitory effects of flavonoid actives on ROS and inflammatory signaling | Suitable for keratinocyte and fibroblast models | |
Rutin | Microcirculation and antioxidant studies | Used to analyze the effects of flavonoids on oxidative injury, erythema, and barrier support | Suitable for soothing and anti-irritation applications | |
Ascorbic acid | Antioxidant and collagen-support studies | Used to evaluate reducing antioxidant activity, collagen-related metabolism, and photodamage buffering | Easily oxidized; stability must be controlled in formulations and experiments | |
Magnesium ascorbyl phosphate | Stable VC studies | Used to analyze the effects of stable VC derivatives on antioxidation, brightening, and collagen support | Suitable for long-term stability and formulation compatibility studies | |
Ascorbyl glucoside | Brightening and antioxidant studies | Used to evaluate the sustained-release antioxidant capacity of VC derivatives in skin models | Suitable for brightening and daytime care applications | |
α-Tocopherol | Lipid antioxidant studies | Used to inhibit membrane lipid peroxidation and support barrier lipid stability | Suitable for combined use with VC and coenzyme Q10 | |
Tocopheryl acetate | Stable VE studies | Used to study the antioxidant and barrier-support effects of VE derivatives in skincare systems | Suitable for formulation stability and in vitro conversion studies | |
Sulforaphane | Nrf2 activation studies | Used to upregulate HO-1, NQO1, GST, and expression of multiple antioxidant enzymes | Suitable as a mechanistic positive control for skincare actives | |
β-Naphthoflavone | Nrf2/NQO1 induction studies | Used to construct positive-control systems for induction of antioxidant enzyme networks | Commonly used for cell-based mechanistic validation | |
Hydrogen peroxide | Oxidative stress model construction | Used to establish acute oxidative injury models in skin cells | Concentration and treatment duration must be strictly controlled | |
tert-Butyl hydroperoxide (t-BHP) | Lipid peroxidation models | Used to construct persistent oxidative stress and membrane lipid injury models | Suitable for use with GPx and GSH system studies | |
DPPH | Chemical antioxidant preliminary screening | Used to evaluate free-radical scavenging capacity of samples | Suitable only for preliminary screening and does not represent cellular efficacy | |
ABTS | Chemical antioxidant preliminary screening | Used to evaluate total antioxidant capacity and electron-donor characteristics | Suitable for comparison of multicomponent systems | |
Fluorescent probe DCFH-DA | Cellular ROS detection | Used to detect changes in total intracellular ROS levels | Suitable for evaluating antioxidant efficacy at the cellular level | |
MDA assay-related standard | Lipid peroxidation detection | Used to evaluate the extent of membrane lipid oxidative injury | Suitable for barrier repair and photoaging studies | |
4-Hydroxynonenal (4-HNE) | Lipid peroxidation end-product studies | Used to analyze late-stage lipid peroxidation burden in oxidative injury | Suitable for combined use with GPx, GST, and membrane lipid protection studies |
6.2 Research-Related Assay Kits for the Skin Cellular Antioxidant Enzyme Network
Catalog No. | Name | Grade and Purity | Corresponding Antioxidant Axis/Target | Suitable Research Direction/Application |
Human Extracellular Superoxide Dismutase [Cu-Zn] (SOD3) ELISA Kit | BioReagent | SOD3 extracellular antioxidant axis | Suitable for studies of extracellular antioxidant barrier function in skin cells, extracellular ROS buffering after UV exposure, and oxidative stress in the matrix microenvironment | |
Human Superoxide Dismutase (SOD) ELISA Kit | BioReagent | Total SOD level | Suitable for evaluating regulation of overall SOD expression by skincare actives | |
Human Superoxide Dismutase 1 (SOD1) ELISA Kit | BioReagent | SOD1 cytosolic antioxidant axis | Suitable for studies of cytosolic ROS-scavenging capacity in keratinocytes and fibroblasts | |
Rat Extracellular Superoxide Dismutase [Cu-Zn] (SOD3) ELISA Kit | BioReagent | SOD3 extracellular antioxidant axis | Suitable for evaluating extracellular antioxidant responses in skin injury, inflammation, and animal models | |
Rat Superoxide Dismutases (SOD) ELISA Kit | BioReagent | Total SOD level | Suitable for monitoring changes in total antioxidant enzymes in rat skin oxidative stress models | |
Rat Superoxide Dismutase 1 (SOD1) ELISA Kit | BioReagent | SOD1 cytosolic antioxidant axis | Suitable for cytosolic antioxidant evaluation in rat skin tissues and cell models | |
Rat Superoxide Dismutase 2, Mitochondrial (SOD2) ELISA Kit | BioReagent | SOD2 mitochondrial antioxidant axis | Suitable for studies of mitochondrial ROS, photoaging, and high oxidative-burden models | |
Mouse For Total Superoxide Dismutases (T-SOD) ELISA Kit | BioReagent | Total SOD level | Suitable for evaluating overall antioxidant capacity in mouse skin | |
Mouse Extracellular Superoxide Dismutase [Cu-Zn] (SOD3) ELISA Kit | BioReagent | SOD3 extracellular antioxidant axis | Suitable for studies of mouse skin barrier and extracellular matrix oxidative environment | |
Mouse Superoxide Dismutases (SOD) ELISA Kit | BioReagent | Total SOD level | Suitable for evaluating mouse skin oxidative injury and skincare intervention effects | |
Mouse Superoxide Dismutase 2, Mitochondrial (SOD2) ELISA Kit | BioReagent | SOD2 mitochondrial antioxidant axis | Suitable for studies of mitochondrial functional injury, UV-induced ROS, and photoaging | |
Mouse Superoxide Dismutase 2, Mitochondrial (Mn-SOD/SOD2) ELISA Kit | BioReagent | Mn-SOD/SOD2 mitochondrial antioxidant axis | Suitable for evaluating enhanced mitochondrial antioxidant protection and cellular energy stress | |
Total Superoxide Dismutase (SOD) Assay Kit (NBT Riboflavin Microplate Method) | BioReagent | Total SOD activity | Suitable for cell samples and high-throughput preliminary screening, facilitating comparison of SOD activity regulation by skincare actives | |
Total Superoxide Dismutase (SOD) Assay Kit (NBT Riboflavin Colorimetric Method) | BioReagent | Total SOD activity | Suitable for routine colorimetric detection in tissue homogenates and extract samples | |
Total Superoxide Dismutase (T-SOD) Activity Assay Kit (WST-8, Micro Method) | BioReagent | Total SOD activity | Higher sensitivity; suitable for micro-volume samples, cell lysates, and activity change analysis after formulation treatment | |
Human Catalase (CAT) ELISA Kit | BioReagent | CAT hydrogen peroxide clearance axis | Suitable for studies of peroxide-clearing capacity and post-UV repair in human skin cells | |
Rat Catalase (CAT) ELISA Kit | BioReagent | CAT hydrogen peroxide clearance axis | Suitable for rat skin oxidative injury and barrier repair models | |
Mouse Catalase (CAT) ELISA Kit | BioReagent | CAT hydrogen peroxide clearance axis | Suitable for evaluating hydrogen peroxide-clearing capacity in mouse skin tissues | |
Catalase (CAT) Activity Assay Kit (UV Colorimetric Method) | BioReagent | CAT activity | Suitable for measuring hydrogen peroxide decomposition capacity in routine samples | |
Catalase (CAT) Activity Assay Kit (UV Micro Method) | BioReagent | CAT activity | Suitable for small-volume skin cell or tissue extract samples | |
Catalase (CAT) Activity Assay Kit (UV Colorimetric Method) | BioReagent | CAT activity | Suitable for routine evaluation of CAT activity in tissues and cell samples | |
Catalase (CAT) Activity Assay Kit (AHM, Micro Method) | BioReagent | CAT activity | Suitable for micro-volume sample detection and skincare active screening studies | |
Catalase (CAT) Activity Assay Kit (AHM, Colorimetric Method) | BioReagent | CAT activity | Suitable for routine colorimetric detection and batch sample comparison | |
Catalase Assay Kit（UV absorption method） | 100T/96S | CAT activity | Suitable for relatively high-throughput experimental designs and comparison of CAT activity after treatment of cells, tissues, or formulations | |
Catalase (CAT) Activity Assay Kit (Peroxidase Method) | BioReagent | CAT activity | Suitable for evaluating CAT functional changes from the perspective of residual peroxide | |
Human Glutathione Peroxidase 1 (GPX1) ELISA Kit | BioReagent | GPX1 intracellular peroxide-clearing axis | Suitable for studies of membrane lipid protection and oxidative stress buffering in human skin cells | |
Human Glutathione Peroxidase (GSH-Px) ELISA Kit | BioReagent | Total GSH-Px level | Suitable for evaluating overall expression changes in the GPx system | |
Human Glutathione Peroxidase 4(GPX4) ELISA Kit | BioReagent | GPX4 lipid peroxidation defense axis | Suitable for studies of skin membrane lipid oxidation, barrier lipid homeostasis, and ferroptosis-related mechanisms | |
Rat Glutathione Peroxidase 3 (GPX3) ELISA Kit | BioReagent | GPX3 extracellular peroxide-clearing axis | Suitable for studies of extracellular antioxidant capacity in rat skin tissues and body fluid environments | |
Rat Glutathione Peroxidase 1 (GPX1) ELISA Kit | BioReagent | GPX1 intracellular clearance axis | Suitable for studies of oxidative injury and repair in rat skin cells | |
Rat Glutathione Peroxidase 4 (GPX4) ELISA Kit | BioReagent | GPX4 lipid peroxidation defense axis | Suitable for studies of barrier lipid injury, membrane oxidation, and anti-aging mechanisms | |
Mouse Glutathione Peroxidase 3 (GPX3) ELISA Kit | BioReagent | GPX3 extracellular antioxidant axis | Suitable for studies of oxidative buffering in mouse skin and extracellular matrix | |
Mouse Glutathione Peroxidase(GSH-Px) ELISA Kit | BioReagent | Total GSH-Px level | Suitable for evaluating the overall glutathione peroxidase system in mouse skin | |
Mouse Glutathione Peroxidase 1 (GPX1) ELISA Kit | BioReagent | GPX1 intracellular clearance axis | Suitable for antioxidant protection studies in mouse skin cells | |
Mouse Glutathione Peroxidase 4 (GPX4) ELISA Kit | BioReagent | GPX4 lipid peroxidation defense axis | Suitable for studies of skin barrier lipid homeostasis and photoaging models | |
Glutathione Peroxidase (GSH-Px) Activity Assay Kit (DTNB, Micro Method) | BioReagent | GSH-Px activity | Suitable for evaluating glutathione peroxidase system activity in micro-volume samples | |
Glutathione Peroxidase (GSH-Px) Activity Assay Kit (DTNB, Colorimetric Method) | BioReagent | GSH-Px activity | Suitable for routine colorimetric evaluation of the GPx system in controlling peroxides and membrane lipid oxidation | |
Human α-glutathione S-transferase(α-GST) ELISA Kit | BioReagent | α-GST detoxification axis | Suitable for studies of pollution exposure, clearance of lipid peroxidation byproducts, and electrophile conjugation/clearance | |
Human Glutathione S Transferase(GST) ELISA Kit | BioReagent | Total GST detoxification axis | Suitable for studies of pollution protection and irritation alleviation in human skin cells | |
Human Glutathione S Transferase A4 (GSTA4) ELISA Kit | BioReagent | GSTA4 lipid peroxidation product clearance axis | Suitable for studies of metabolism of lipid peroxidation byproducts such as 4-HNE | |
Human Glutathione S Transferase Theta 1 (GSTt1) ELISA Kit | BioReagent | GSTθ1 detoxification axis | Suitable for studies of specific exogenous chemical exposures and metabolic responses | |
Human Glutathione S Transferase Omega 1 (GSTo1) ELISA Kit | BioReagent | GSTω1 redox regulation axis | Suitable for studies of oxidative stress, protein thiol status, and stress recovery | |
Mouse Glutathione S Transferase Alpha 1 (GSTa1) ELISA Kit | BioReagent | GSTA1 detoxification axis | Suitable for studies of pollution protection and oxidative byproduct clearance in mouse skin | |
Mouse Glutathione S Transferase A4 (GSTα4) ELISA Kit | BioReagent | GSTA4 lipid peroxidation product clearance axis | Suitable for studies of lipid oxidation and membrane injury in mouse skin | |
Mouse Glutathione Transferase (GST) ELISA Kit | BioReagent | Total GST detoxification axis | Suitable for evaluating overall detoxification and anti-irritation capacity in mouse skin | |
Glutathione S-Transferase (GST) Activity Assay Kit (Micro Assay) | BioReagent | GST activity | Suitable for micro-volume sample detection and comparison of GST activity after pollution exposure or formulation intervention | |
Glutathione S-transferase (GST) detection kit (CDNB, microcalorimetry) | BioReagent | GST activity | Suitable for GST activity measurement in cell samples and small-volume samples | |
Glutathione S-Transferase (GST) Activity Assay Kit (CDNB, Colorimetric Method) | BioReagent | GST activity | Suitable for routine colorimetric evaluation of electrophile clearance and pollution protection capacity | |
Reduced Glutathione (GSH) Content Assay Kit (DTNB, Micro Method) | BioReagent | GSH reserve | Suitable for analyzing overall cellular reducing capacity and antioxidant reserve in micro-volume samples | |
Reduced Glutathione (GSH) Content Assay Kit (DTNB, Colorimetric Method) | BioReagent | GSH reserve | Suitable for determination of reduced glutathione content in routine samples | |
Oxidized Glutathione (GSSG) Content Assay Kit (DTNB, Micro Method) | BioReagent | GSSG burden | Suitable for evaluating redox imbalance in micro-volume samples | |
Oxidized Glutathione (GSSG) Content Assay Kit (DTNB, Colorimetric Method) | BioReagent | GSSG burden | Suitable for analysis of oxidized glutathione accumulation in routine samples | |
Human Nuclear Factor Erythroid 2-related Factor 2 (Nrf2) ELISA Kit | BioReagent | Nrf2 expression detection | Suitable for quantitative determination of Nrf2 protein levels in human skin cells or samples | |
Mouse Nuclear Factor Erythroid 2-related Factor 2 (Nrf2) ELISA Kit | BioReagent | Nrf2 expression detection | Suitable for analysis of Nrf2 expression in mouse skin tissues and in vivo models | |
Human Heme Oxygenase 1 (HO-1) ELISA Kit | BioReagent | HO-1 downstream protective axis | Suitable for evaluating changes in HO-1 expression after Nrf2 induction | |
Rat Heme Oxygenase 1, Decycling (HO-1) ELISA Kit | BioReagent | HO-1 downstream protective axis | Suitable for rat skin injury and inflammation models | |
Mouse Heme Oxygenase 1 (HO-1) ELISA Kit | BioReagent | HO-1 downstream protective axis | Suitable for studies of photoinduced injury and oxidative stress in mouse skin | |
Human NADH Dehydrogenase, Quinone 1 (NQO1) ELISA Kit | BioReagent | NQO1 detoxification and antioxidant axis | Suitable for evaluating the effects of Nrf2-inducing actives on NQO1 expression | |
Rat NADH Dehydrogenase, Quinone 1 (NQO1) ELISA Kit | BioReagent | NQO1 detoxification and antioxidant axis | Suitable for detecting NQO1 antioxidant responses in rat skin tissues |
6.3 Research Products Related to Nrf2/HO-1/NQO1/GST in the Skin Antioxidant Enzyme Network
Catalog No. | Name | Grade and Purity | Corresponding Antioxidant Axis/Target | Suitable Research Direction/Application |
Cheirolin | ≥97% | Nrf2 activation axis | Suitable for verifying whether an active ingredient upregulates the endogenous antioxidant enzyme network through Nrf2 | |
ML 334 | ≥98%(HPLC) | Keap1-Nrf2 interaction axis | Suitable for mechanistic studies to verify whether inhibition of Keap1 enhances Nrf2 signaling output | |
ML385 | Moligand™, ≥99% | Nrf2 inhibition axis | Suitable for reverse validation of whether skincare actives exert antioxidant effects in an Nrf2-dependent manner | |
NK 252 | ≥98%(HPLC) | Nrf2 activation axis | Suitable for studies of oxidative stress, photoaging, and inflammatory buffering in skin cells | |
Nrf2 activator-1 | ≥98% | Nrf2 activation axis | Suitable for screening upstream Nrf2 induction and downstream enzyme expression changes | |
Nrf2 activator-12 | ≥98% | Nrf2 activation axis | Suitable as a mechanistic control for skincare actives and for oxidative injury recovery experiments | |
Nrf2 activator-2 | ≥95% | Nrf2 activation axis | Suitable for preliminary cellular antioxidant screening and ROS inhibition studies | |
Nrf2 activator-3 | ≥98% | Nrf2 activation axis | Suitable for validation of Nrf2 pathway upregulation and downstream readouts such as HO-1 and NQO1 | |
Nrf2 activator-4 | ≥98% | Nrf2 activation axis | Suitable for studies of photodamage, pollution exposure, and soothing mechanisms | |
Nrf2-IN-1 | ≥99% | Nrf2 inhibition axis | Suitable for reverse proof of whether certain antioxidant phenotypes truly depend on the Nrf2 pathway | |
Nrf2-IN-3 | ≥99% | Nrf2 inhibition axis | Suitable for constructing forward and reverse Nrf2 pathway validation systems together with activators | |
Nrf2/HO-1 activator 1 | Nrf2-HO-1 axis | Suitable for simultaneously observing antioxidant and soothing-related response outputs | ||
Nrf2/HO-1 activator 2 | Nrf2-HO-1 axis | Suitable for evaluating the role of HO-1 induction in buffering skin oxidative stress | ||
RA 839 | Moligand™, ≥98%(HPLC) | Nrf2 activation axis | Suitable for validation of Nrf2-dependent cellular protection mechanisms | |
TAT 14TFA | ≥98% | Nrf2 activation axis | Suitable for constructing positive-control models of Nrf2 upregulation | |
Recombinant Human Nrf2 Protein | Carrier Free, His Tag, ≥90%(SDS-PAGE), See COA | Recombinant Nrf2 protein | Suitable for protein interaction, in vitro binding, and mechanistic validation studies | |
NQO1 Human Pre-designed siRNA Set A | NQO1 gene silencing | Suitable for validating the functional contribution of NQO1 in skin antioxidation and pollution protection | ||
Recombinant GST3 / GSTP1 Antibody | KD Validation | GSTP1 detoxification and redox signaling axis | Suitable for validation of the role of GSTP1 in skin antioxidation and stress defense | |
Recombinant GST3/GST pi Antibody | Recombinant, ExactAb™, Validated, High Performance, See COA | GSTP1 detoxification and redox signaling axis | Suitable for GSTP1 protein detection and mechanistic analysis | |
Recombinant GSTK1 Antibody | Recombinant, ExactAb™, Validated, See COA | GSTK1 mitochondria/peroxisome-related detoxification axis | Suitable for studies of organelle oxidative injury and metabolic stress | |
Recombinant GSTM1 Antibody | ExactAb™, Validated, Recombinant, 0.7 mg/mL | GSTM1 detoxification axis | Suitable for detoxification studies related to exogenous stimulation and environmental exposure | |
Recombinant GSTO1 Antibody | KO Validation | GSTO1 redox regulation axis | Suitable for validating the role of GSTO1 in redox homeostasis | |
Recombinant Human GSTP1 Protein | Carrier Free, His Tag, ≥95%(SDS-PAGE), See COA | Recombinant GSTP1 protein | Suitable for in vitro enzymology, substrate binding, and mechanistic studies |
Cutaneous antioxidant defense is not dominated by a single ingredient, but by a continuous enzyme network composed of SOD, CAT, GPx, Prx, Trx, and the glutathione cycle. For skincare and cosmetic development, the more mechanistically valuable path is not simple stacking of ingredients marketed under an “antioxidant” concept, but establishment of a complete activity design and efficacy evaluation system centered on maintenance, induction, and delivery efficiency of endogenous antioxidant enzyme networks.
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