Antioxidant Agent

Indole-3-pyruvic acid is an orally active ketone analog of tryptophan, and is an aryl hydrocarbon receptor (AHR) agonist. Indole-3-pyruvic acid inhibits p38/MAPK phosphorylation, regulates the tryptophan metabolic pathway, and also possesses protective activities against skin photodamage, as well as anti-inflammatory and anti-anxiety bioactivities in the gut. Indole-3-pyruvic acid can downregulate the expression of IL-1β, IL-6, Cox-2, and Bax to alleviate UVB-induced keratinocyte toxicity. Indole-3-pyruvic acid can activate AHR to promote Tr1 cell differentiation, increase IL-10, and inhibit Th1 cytokine production. Indole-3-pyruvic acid can alter the levels of kynurenine metabolites in the brain, mediating central nervous system-related effects. Indole-3-pyruvic acid can be used in research on skin lesions, colitis, and anxiety.

Pterostilbene is a stilbenoid isolated from blueberries and Pterocarpus marsupium. Shows anti-oxidant, anti-inflammatory, anti-carcinogenic, anti-diabetic and anti-obesity properties. Pterostilbene blocks ROS production, also exhibits inhibitory activity against various free radicals such as DPPH, ABTS, hydroxyl, superoxide and hydrogen peroxide.

Citraconic acid (Methylmaleic acid) is an orally active inhibitor targeting the NLRP3 inflammasome and Keap1-Nrf2 pathway. Citraconic acid reduces reactive oxygen species (ROS) generation by inhibiting succinate dehydrogenase (SDH) activity. Citraconic acid also modifies the conformation of Keap1 protein, relieves its inhibition of Nrf2, promotes antioxidant gene expression, and inhibits NLRP3 activation and the release of pro-inflammatory factors such as IL-1β and IL-18. Citraconic acid has anti-inflammatory and antioxidant activities, can reduce oxidative stress and cell pyroptosis, improve tissue damage, and can be used for the research of inflammation-related diseases such as acute renal ischemia-reperfusion injury. Citraconic acid is an isomer of Itaconic acid (HY-Y052).

Gibberellic acid (GA₃) is a natural plant growth regulator with oral bioactivity. Gibberellic acid governs multiple plant developmental events, including seed germination, cell elongation, floral organ formation, and rice spikelet fertility. Gibberellic acid optimizes root morphology and secondary metabolite production in Echinacea purpurea hairy roots, and serves as a bioactive seed priming agent to improve chilling stress tolerance in chickpea. Gibberellic acid mediates modulation of enzyme activity and secondary metabolism in plants and exerts tissue-specific regulatory effects on antioxidant systems and lipid peroxidation in rats. Gibberellic acid can be used in studies of plant growth, metabolism, and abiotic stress responses.

Sodium sulfite is an inorganic salt used as an antioxidant and preservative. Sodium sulfite is also used in sulfonation and sulfomethylation reactions. Sodium sulfite can also be used as a bleaching agent, desulfurizer, and dechlorinator. Sodium sulfite inhibits hepatocyte proliferation, promotes hepatocyte apoptosis and necrosis, and impairs mitochondrial integrity. Sodium sulfite induces superoxide anion production, primes neutrophils for enhanced superoxide anion generation, and induces neutrophil gene expression. Sodium sulfite can be used in studies related to pulmonary inflammation and gastric tissue injury.

Sodium citrate (Trisodium citrate) dihydrate is an orally active natural product that can be found in citrus fruits. Sodium citrate dihydrate can inhibit the proliferation of tumor cells and induce apoptosis. Sodium citrate dihydrate has antibacterial, anti-tumor and antioxidant activities. Sodium citrate dihydrate can be prepared as a cosolvent or buffer.

Dihydrolipoic Acid (DHLA) is an excellent antioxidant capable of scavenging almost any oxygen-centered radical. Dihydrolipoic acid exhibits anti-inflammatory properties in various diseases. Dihydrolipoic Acid exerts a preventive effect via ERK/Nrf2/HO-1/ROS/NLRP3 pathway in LPS-induced sickness behavior rats. Dihydrolipoic Acid can be used for the reaserch of depression.

Isobavachin is an orally active, blood-brain barrier-penetrating prenylated flavonoid present in Psoralea corylifolia. Isobavachin inhibits human CYP2B6, CYP2C9, CYP2C19, UGT1A1, UGT1A9, and UGT2B7. Isobavachin suppresses MAPK activation, NF-κB nuclear translocation, overexpression of iNOS/COX-2, FcεRI-mediated signaling pathways, and RANKL-induced osteoclastogenesis. Isobavachin induces autophagy, cytotoxicity, neuronal differentiation, and NRF2 activation; it alleviates oxidative damage, inflammatory responses, apoptosis, iron accumulation, mitochondrial biogenesis, and mast cell degranulation. Isobavachin is applicable to research related to liver injury, inflammatory diseases, osteoporosis, liver cancer, prostate cancer, glioma, periodontitis-induced bone loss, and Alzheimer's disease.

Sodium thiosulfate (Sodium hyposulfite) is an antioxidant. Sodium thiosulfate inhibits the expression of p-GSK-3β and β-catenin proteins, reduces IL-1β, COX-2, and Iba-1, and inhibits NFκB activation. Sodium thiosulfate promotes angiogenesis, inhibits inflammation, and improves acute lung injury. Sodium thiosulfate also exhibits anti-cancer activity against melanoma. Sodium thiosulfate also exerts renal protective effects. Sodium thiosulfate can be used in the research of osteoarthritis, brain inflammation, cancer (such as breast cancer, melanoma), and kidney disease.

Parishin B is a multi-target biological agent with anti-epileptic, anti-fascioliasis and anti-breast cancer lung metastasis activities. Parishin B regulates the gene/protein activities of ACLY, unc13c, γ-aminobutynergic system, pro-inflammatory system, antioxidant system, monoaminergic system, ferroptosis-related pathways, as well as GST, CatL, Trx and TRIB3. Parishin B modulates energy-lipid metabolism, synaptic function, neurotransmitter balance, neuroinflammation, oxidative stress, parasite detoxification/invasion processes, as well as apoptosis, cell cycle, proliferation and metastasis of cancer cells^[1][2][3]. Parishin B can be used for related research of epilepsy, fascioliasis and breast cancer lung metastasis^[3].

Diludine (BNP-7787) is an orally effective feed additive. Diludine reduces the activity of G6PD and increases the level of superoxide dismutase (SOD). Diludine reduces the mutagenic effect of environmental pollutants, protects parental reproductive systems and improves offspring quality. Diludine is mainly applied during the transition period of dairy cows to increase milk yield and milk fat content, and improve health status during parturition. Diludine can be used in animal feeding research.

Sodium citrate (Trisodium citrate) dihydrate, meets USP testing specifications is an orally active natural product that can be found in citrus fruits. Sodium citrate dihydrate can inhibit the proliferation of tumor cells and induce apoptosis. Sodium citrate dihydrate has antibacterial, anti-tumor and antioxidant activities. Sodium citrate dihydrate can be prepared as a cosolvent or buffer.

(R,R)-Secoisolariciresinol diglucoside ((R,R)-SDG) is an isomer of Secoisolariciresinol diglucoside (HY-105008). (R,R)-Secoisolariciresinol diglucoside scavenges hydroxyl radicals, peroxyl radicals, and DPPH radicals. (R,R)-Secoisolariciresinol diglucoside reduces γ-ray-induced strand breaks in calf thymus DNA. (R,R)-Secoisolariciresinol diglucoside can be used in studies of oxidant-dependent inflammatory tissue injury.

Moracin N is a benzofuran compound. At low concentrations, Moracin N activates the Keap1/Nrf2 pathway, downregulates the expression of FTH1 and ACSL4, enhances glutathione synthesis, and inhibits neuronal ferroptosis. At high concentrations, Moracin N induces ROS accumulation, activates mitochondrial apoptosis, and triggers autophagy-mediated cell death by inhibiting the AKT/mTOR pathway. Moracin N can be used in research related to non-small cell lung cancer, hepatocellular carcinoma and ischemic brain injury.

α-Glucosylrutin, a flavonoid, is a potent antioxidant with free radical scavenging activity. α-Glucosylrutin reduces MMP-1 gene expression, protein expression, and enzyme activity, and reduces MMP-2 protein expression and enzyme activity in UVA-irradiated human dermal fibroblasts. α-Glucosylrutin prevents oxidative stress-induced intracellular tyrosine residue phosphorylation and counteracts intracellular thiol level depletion in human skin cells. α-Glucosylrutin is effective in the prevention of dermatologic diseases in which oxidative stress is of pathogenetic relevance, e.g. in polymorphous light eruption (PLE). α-Glucosylrutin can be used for the research of UV-induced skin photodamage/photoaging.

Mesaconic acid (Citronic acid; Methylfumaric acid) is an orally active anti-inflammatory and antioxidant agent. Mesaconic acid reduces the level of NF-κB in colon tissues, downregulates the expression of Keap1 and Bax, upregulates the expression of Nrf2 and Bcl2, and decreases the expression of Caspase-1. Mesaconic acid reduces the levels of NLRP3, ASC and Casp-1 in colon, liver and kidney tissues. Mesaconic acid reduces pro-inflammatory cytokine levels, increases the level of the anti-inflammatory cytokine IL-10, elevates NAD⁺ levels, regulates oxidative stress markers and antioxidant enzyme levels, and upregulates intestinal barrier proteins in colon, liver and kidney tissues. Mesaconic acid increases the abundance of beneficial gut bacteria and reduces the abundance of harmful gut bacteria in rapidly aging mice, and exhibits anti-aging properties. Mesaconic acid acts as a flame retardant and serves as a competitive inhibitor of fumarate reduction. Mesaconic acid can be used in the research of aging-related inflammation.

Carveol is an orally active monoterpenoid alcohol with neuroprotective, antioxidant, anti-inflammatory, anticonvulsant, antidiabetic, hypolipidemic and hepatoprotective activities. Carveol upregulates the expression of Bcl2, downregulates the expression of caspase-3, TNF-α, IL1β and IL6, activates the Nrf2/HO-1 antioxidant signaling pathway, inhibits the RAGE/NF-κB signaling pathway, and suppresses neuroinflammation and neuronal apoptosis. Carveol inhibits α-synuclein aggregation, improves cognitive ability, and inhibits α-amylase activity. Carveol exerts neuroprotective effects in a rat model of Parkinson's disease. Carveol exhibits antidiabetic effects in alloxan-induced diabetic rats. Carveol alleviates PTZ-induced seizures in rats. Carveol can be used in research related to Parkinson's disease, epilepsy, diabetes and ischemic stroke.

(E)-m-Coumaric acid (trans-3-Hydroxycinnamic acid) is a natural phenolic cinnamic acid derivative with antioxidant activity, and it is found in the young shoots of Limonium densiflorum. (E)-m-Coumaric acid upregulates the levels of SOD and GSH and reduces MDA levels, thereby alleviating oxidative stress and lipid peroxidation in liver tissue. (E)-m-Coumaric acid can be used in studies related to oxidative stress-mediated liver injury.

Citric acid triammonium (Triammonium citrate) is a natural preservative and food tartness enhancer. Citric acid triammonium induces apoptosis and cell cycle arrest at G2/M phase and S phase in HaCaT cells. Citric acid triammonium cause oxidative damage of the liver by means of the decrease of antioxidative enzyme activities. Citric acid triammonium is also an acidulant, emulsifier, sequestrant and buffering agent widely used across many industries.

Tocopherols are orally effective antioxidants and ferroptosis inhibitors. Tocopherols scavenge ROS/RNS, alleviate DNA damage, downregulate cyclin D1/c-Myc/TFF/pS2/PGR in an ER-dependent manner, and inhibit ferroptosis mediated by lipid peroxidation. Tocopherols block the occurrence of ferroptosis in Gpx4-knockout Pfa1 cells, with an EC₅₀ value of 1.0-2.3 μM. Tocopherols inhibit tumor growth. Tocopherols can be used in studies related to estrogen-mediated ER⁺ breast cancer, oxidative stress-induced carcinogenesis, and ferroptosis regulation.