Oxidative Stress and Inflammation

NADH disodium salt (Disodium NADH) is an orally effective reduced coenzyme. NADH disodium salt plays a role in regenerating electron donors during cellular energy metabolism, including glycolysis, β-oxidation, and the tricarboxylic acid (TCA) cycle. NADH disodium salt regulates calcium homeostasis by promoting the opening of IP3-gated Ca²⁺ channels and inhibiting Ryanodine receptor, and affects mitochondrial function through direct interaction with VDAC. NADH disodium salt is used in cytoprotective studies related to cerebral ischemic injury, neurodegenerative diseases, aging, and signal transduction.

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.

KI696 is a selective KEAP1/NRF2 protein-protein interaction inhibitor with a human K_d value of 1.3 nM. KI696 acts by competitively occupying the NRF2-binding pocket of the KEAP1 Kelch domain. KI696 blocks KEAP1-mediated ubiquitination and degradation of NRF2, promotes the translocation of NRF2 to the nucleus, activates the expression of downstream antioxidant genes, increases intracellular glutathione levels, and alleviates oxidative stress-induced cell damage and inflammatory cell infiltration in the lungs. KI696 reduces ozone-induced pulmonary oxidative damage and inflammatory cell accumulation in rats, and upregulates pulmonary antioxidant genes. KI696 can be used in research related to chronic obstructive pulmonary disease, oxidative stress and inflammation.

Stigmasterol is an orally acitve, immunomodulatory agent with anti-inflammatory and neuroprotective effect, as well as able to cross the blood-brain barrier. Stigmasterol activates AMPK, which in turn inhibits NF-κB and NLRP3 signaling pathways, reduces microglia-mediated neuroinflammation, and alleviates cognitive impairment and Alzheimer's disease. Stigmasterol regulates M1/M2 polarization of microglia through the TLR4/ NF-κB pathway, thereby reducing neuropathic pain. Stigmasterol can be used for neurodegenerative diseases, inflammatory diseases, and pain management, among others.

Lipoic acid ((R)-(+)-α-Lipoic acid) is an antioxidant, which is an essential cofactor of mitochondrial enzyme complexes. (R)-(+)-α-Lipoic acid is more effective than racemic Lipoic acid.

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).

O6-Benzylguanine is an orally active, blood-brain barrier-penetrant inhibitor of O⁶-methylguanine-DNA methyltransferase (MGMT/AGT). O6-Benzylguanine modulates p53 and its downstream p21 and cyclins to induce cell cycle arrest and apoptosis, and on the other hand activates mTORC1/MAPK and other signaling pathways to induce cellular senescence by inhibiting intracellular MGMT. O6-Benzylguanine is used in research related to various tumors, cellular senescence, and vascular smooth muscle dysfunction.

Ligustrazine (Chuanxiongzine) is an orally active, blood-brain barrier-permeable alkaloid. It can be isolated from Ligusticum striatum DC. Ligustrazine reduces ROS, upregulates the levels of p-Akt/Akt and p-eNOS/eNOS, and decreases ALT and AST. It inhibits glutamate excitotoxicity, calcium overload, oxidative stress, ischemia-reperfusion injury and atherosclerotic plaque progression, enhances synaptic plasticity, and improves neurological function, cerebral infarct volume and brain water content. Ligustrazine possesses anti-inflammatory, antioxidant, lipid-lowering, endothelial protective and hepatoprotective activities. It can be used in studies related to ischemic stroke, cerebral ischemia-reperfusion injury and atherosclerosis.

p-Nitrobenzyl mesylate (4-Nitrobenzyl mesylate) is an alkylating reagent. p-Nitrobenzyl mesylate alkylates thiophosphorylated serine, threonine, tyrosine residues and cysteine thiols, without modifying hydroxyl, amino or carboxylic acid functional groups. p-Nitrobenzyl mesylate generates thiophosphate epitopes on thiophosphorylated substrate proteins for recognition by thiophosphate-specific antibodies. p-Nitrobenzyl mesylate facilitates the identification and purification of kinase substrates. p-Nitrobenzyl mesylate is applicable to studies related to cerebral ischemia-reperfusion injury.

9''-Methyl salvianolate B (MSB) is a blood-brain barrier-permeable inhibitor with high affinity for g5Rp, with a K_d value of 117 nM against African swine fever virus (ASFV) g5Rp. 9''-Methyl salvianolate B also acts as a ZBP1 inhibitor. It exhibits strong binding affinity to key proteins in the PPARγ/NF-κB pathway. 9''-Methyl salvianolate B blocks the interaction between ASFV g5Rp and host proteins eIF5A or RPS15. It restores hypusination modification of eIF5A, promotes autophagy (Autophagy), and inhibits ASFV replication. 9''-Methyl salvianolate B effectively disrupts ZBP1-mediated PANoptosome assembly. It effectively alleviates myocardial ischemia/reperfusion injury. 9''-Methyl salvianolate B can be used in studies related to African swine fever.

NADP disodium salt is the disodium salt form of NADP (HY-113325). NADP is a coenzyme involved in cellular electron transfer reactions in biological metabolism, which is alternately oxidized (NADP+) and reduced (NADPH), and can maintain cellular redox homeostasis and regulate many biological events, including cellular metabolism. NADPH is a universal electron donor that provides reducing ability for synthetic metabolic reactions and redox balance. NADPH plays a multifunctional role in regulating inflammation, redox homeostasis, and synthetic metabolism processes.

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.

Luciferase (bacterial) acts as a luminescence inducer and catalyst. Luciferase (bacterial) catalyzes the reduction of methylene blue, quinones, ferricyanide, and FMN using reduced DPN (HY-12452) (or an alternative electron donor for FMN). Luciferase (bacterial) binds to reduced FMN to form a luminescent reaction complex. Luciferase (bacterial) scavenges reactive oxygen species (ROS) and protects bacterial cells from oxidative stress damage. Luciferase (bacterial) is applicable to studies related to oxidative stress.

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.

Faricimab, an overall good safety and tolerability profile, is a bispecific antibody targeting Angiopoietin-2 (Ang-2) and vascular endothelial growth factor-A (VEGF-A). Faricimab prevents retinal vascular leakage, cell death and inflammation in retinal ischemia/reperfusion (I/R) injury and sCNV mouse models. Faricimab demonstrates statistically superior visual acuity gains versus Ranibizumab (HY-P9951). Faricimab can be used for retinal diseases, such as age-related macular degeneration (w-AMD), diabetic macular edema (DME) and macular edema following retinal vein occlusion (RVO).

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.

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].