Reactive oxygen species (ROS), such as superoxide anion (O2-), hydrogen peroxide (H2O2), and hydroxyl radical (HO•), consist of radical and non-radical oxygen species formed by the partial reduction of oxygen. Cellular ROS are generated endogenously during mitochondrial oxidative metabolism as well as in cellular response to xenobiotics, cytokines, and bacterial invasion.
ROS also activates MAPK pathways by the direct inhibition of MAPK phosphatases. Through PTEN, the PI3K pathway is subject to reversible redox regulation by ROS generated by growth factor stimulation. The activation of autophagy may be a cellular defense mechanism in response to ROS.
Platycodin D2 is an orally active triterpenoid saponin found in Platycodon grandiflorum. Platycodin D2 induces mitophagy in cancer cells through NIX, thereby activating the P21/CyclinA2 pathway and promoting cell senescence. Platycodin D2 induces mitochondrial dysfunction, enhances autophagy, inhibits hepatocellular carcinoma cell proliferation, and exhibits anti-tumor activity against multiple cancer cell types. Platycodin D2 promotes mRNA expression of T-bet, GATA-3, Th1 cytokines IL-2 and IFN-γ, and Th2 cytokines IL-4 and IL-10, enhances splenocyte proliferation, and acts as a vaccine adjuvant with low rabbit red blood cell hemolytic activity. Platycodin D2 induces mitochondrial ROS production, incomplete autophagy, and ferroptosis to inhibit breast cancer cell proliferation. Platycodin D2 can be used for the research of cancer, inflammation and immunology.
1-Pyrenebutyric acid is a fluorescence probe whose fluorescence lifetime depends on local oxygen and free radical concentrations. 1-Pyrenebutyric acid is used in fluorescence determination of DNA. 1-Pyrenebutyric acid can be used as a linker for biomolecules to form a self-assembled monolayer on grapheme. 1-Pyrenebutyric acid can also be used for the measurement of free radicals in solution and in living cells.
Guaiazulene is a bicyclic sesquiterpene. Guaiazulene exhibits various biological activities such as anti-inflammatory, antioxidant, hepatoprotective, antibacterial, and anti-tumor properties. Guaiazulene is also commonly used as a colorant in cosmetics. Guaiazulene shows in vitro cytotoxicity to rat neuronal cells and N2a neuroblastoma cells at high concentrations.
CYP2E1-IN-1 (Compound 10) is an orally active cytochrome P450 2E1 (CYP2E1) inhibitor with a Kd of 7.02 μM, an IC50 of 1.64 μM, and a Ki of 0.897 μM. CYP2E1-IN-1 activates the Nrf2/HO-1 signaling pathway and inhibits ROS production, thereby alleviating pancreatic injury. CYP2E1-IN-1 has significant anti-inflammatory and antioxidant activities and can effectively reduce inflammation and oxidative stress in severe acute pancreatitis (SAP). CYP2E1-IN-1 can be used in the study of SAP and other inflammatory-related diseases.
Licoricesaponin G2 is an orally active component found in Licorice. Licoricesaponin G2 significantly ameliorates Bleomycin (HY-108345)-induced pulmonary fibrosis by inhibiting the TNF-α signaling pathway, reducing epithelial-mesenchymal transition, and decreasing extracellular matrix deposition. Licoricesaponin G2 inhibits cancer cells proliferation, migration, inhibits PI3K/AKT/mTOR signaling pathway and increases ROS production. Licoricesaponin G2 can be used for the research of lung cancer and pulmonary fibrosis.
Polygalasaponin F is an orally active triterpenoid saponin monomer. Polygalasaponin F downregulates the expression of Bax, p53, caspase-3, NF-κBp65 and MEK1; restores and upregulates the expression of Bcl-2; activates the PI3K/Akt signaling pathway; inhibits the phosphorylation of p38 MAPK, nuclear translocation of NF-κB, TLR4-mediated signaling pathway, mitophagy (Mitophagy) and ROS production; enhances cell viability and suppresses apoptosis (Apoptosis). Polygalasaponin F maintains mitochondrial function, alleviates Ca2+ overload, upregulates pCREB and BDNF, preserves cell viability and inhibits the release of inflammatory cytokines. Polygalasaponin F alleviates lung injury induced by influenza A H1N1 and cerebral ischemia-reperfusion injury. Polygalasaponin F is applicable to researches related to Parkinson's disease, cerebral ischemia, pneumonia induced by influenza A H1N1, stroke and Alzheimer's disease.
Notoginsenoside R2 (20(S)-Notoginsenoside R2; Ginsenoside Ng-R2) is an orally active notoginsenoside. Notoginsenoside R2 activates P90RSK and Nrf2 via the MEK1/2-ERK1/2 pathway to inhibit 6-OHDA-induced apoptotic damage in nerve cells. Notoginsenoside R2 upregulates SOX8/β-catenin by reducing miR-27a, thereby suppressing Aβ25-35-induced neuronal apoptosis and inflammatory responses. Notoginsenoside R2 alleviates lipid accumulation and mitochondrial dysfunction in diabetic nephropathy by inhibiting c-Src. Notoginsenoside R2 alleviates hepatic fibrosis by inducing hepatic stellate cell senescence and inhibiting the inflammatory microenvironment via JAK/STAT3 suppression. Notoginsenoside R2 can be used in research related to Parkinson's disease, Alzheimer's disease, diabetic nephropathy and hepatic fibrosis.
Moracin O is a 2-arylbenzofuran isolated from the Morus alba Linn. . Moracin O exhibits potent in vitro inhibitory activity against hypoxia-inducible factor (HIF-1). Moracin O reduces oxygen-glucose deprivation (OGD)-induced reactive oxygen species (ROS) production. Moracin O has neuroprotective and anti-inflammatory effects.
7-Methylcoumarin is a coumarin derivative with potent hepatoprotective and antioxidant properties. 7-Methylcoumarin is a mechanism-based inhibitor for CYP2A6. 7-Methylcoumarin significantly decreases alanine aminotransferase (ALT), aspartate aminotransferase (AST), and serum bilirubin (TB) in rats with CCl4-induced liver damage, whilst restoring total protein (TP) and albumin (TA) levels in serum as well as preventing oxidative stress. 7-Methylcoumarin can decline mitotic activity of A. sativum promeristem.
Clovamide (trans-Clovamide), a natural phenolic compound, is a potent antioxidant. Clovamide is an excellent ROS and oxygen radical scavenger. Clovamide also has anti-inflammatory and neuroprotective effects. Clovamide is an anti-microbial with activity against the human pathogens influenza A subtype H5N1, Trypanosoma evansi, and Heliobacter pylori.
Yamogenin (Neodiosgenin) is a diastereomer of diosgenin. Yamogenin antagonizes the activation of the liver X receptor (LXR) in luciferase ligand assay. Yamogenin inhibits triacylglyceride (TG) accumulation through the suppression of gene expression of fatty acid synthesis in HepG2 hepatocytes. Yamogenin is a steroidal saponin that can be obtained from plant species with in vitro cytotoxicity, antioxidant, and antimicrobial properties. Yamogenin induces cell death via the extrinsic and intrinsic way of apoptosis. Yamogenin inhibits protein denaturation with an IC50 of 1421.92 μg/mL. Yamogenin can be studied in research on gastric cancer.
Avenanthramide A is an orally active phytoalexin that targets the RNA helicase DDX3 with a KD of 8.8 μM. Avenanthramide A induces mitochondrial swelling and increased ROS production, and triggers apoptosis in CRC cells. Avenanthramide A inhibits smooth muscle cell proliferation and enhances nitric oxide production. Avenanthramide A can be used in research on colorectal cancer and atherosclerosis.
Aloesone is a phenolic compound. Aloesone can inhibit the production of ROS, the release of NO, M1 polarization, and apoptosis in RAW264.7 cells stimulated by LPS (HY-D1056). Aloesone has anti-inflammatory and antioxidant activities.
Dammarenediol II is a ginsenoside precursor. Dammarenediol II reduces the activity of O-GlcNAc transferase (OGT) and downregulates the global O-GlcNAcylation level. Dammarenediol II inhibits the phosphorylation of Akt, mTOR and GSK3β. Dammarenediol II inhibits human carboxylesterase activity, VEGF-induced ROS production, stress fiber formation and vascular endothelial cadherin disruption. Dammarenediol II promotes cell apoptosis (apoptosis), increases the levels of cleaved PARP1 and p53, and inhibits retinal microvascular leakage. Dammarenediol II can be used in studies related to liver cancer and diabetic retinopathy.
DEANO sodium is notric oxide donor. DEANO sodium potentiates the abilitv of hypoxanthine/xanthine oxidase to induce lipid peroxidation as well as DNA single- and double-strand breaks.
Methyl aminolevulinate hydrochloride is a sensitizer used in photodynamic therapy (PDT). Methyl aminolevulinate hydrochloride penetrates the skin and induces the production of photoactive porphyrins including protoporphyrin IX in cells; upon exposure to appropriate light, it generates ROS, which triggers cellular oxidation and cell death. Methyl aminolevulinate hydrochloride acts as a photo-damage reversing agent through epidermal reconstruction, cytokine-mediated activation of dermal fibroblasts, elastin breakdown, new collagen formation, and compression of dilated capillaries. Methyl aminolevulinate hydrochloride reduces the expression of the proliferation marker Ki-67 and the early skin carcinogenesis marker TP53. Methyl aminolevulinate hydrochloride delays the onset of ultraviolet-induced skin tumors and reduces tumor burden in hairless mice. Methyl aminolevulinate hydrochloride is applicable to research related to actinic keratosis and basal cell carcinoma.
HDAC9-IN-1 is a selective class IIa HDAC inhibitor that binds to HDAC9 with an IC50 of 40 nM. HDAC9-IN-1 potently inhibits HDACs 4 and 7 while showing weak activity against HDAC6 (IC50 values: 180 nM (HDAC4), 190 nM (HDAC7), 970 nM (HDAC6)). HDAC9-IN-1 significantly inhibits several human cancer cells, induces apoptosis and DNA damage in human cancer cells, and modulates caspase-related proteins and p38 in human cancer cells. HDAC9-IN-1 can be used for the research of oral cancer, breast cancer, gastric cancer.
Biotinoyl tripeptide-1 (Biotinyl-GHK) is a biotinylating reagent linked to a GHK (glycyl-L-histidyl-L-lysine) tripeptide. Biotin tripeptide-1 is a bioactive peptide with hair care (improves the appearance and feel of hair) and hair growth effects. Biotinoyl tripeptide-1 has a certain affinity for streptavidin. Biotinoyl tripeptide-1 inhibits the production of ROS and has antioxidant effects. Biotinoyl tripeptide-1 reduces the production of carbonylated amyloid-β (Aβ) and inhibits Aβ aggregation. Biotinoyl tripeptide-1 can be used in the study of neurodegenerative diseases.
Hydralazine is an orally active, blood-brain barrier-permeable DNA methyltransferase inhibitor with vasodilatory, arterial smooth muscle relaxant and hypotensive activities. Hydralazine reactivates silenced tumor suppressor genes via mediating DNA demethylation, while exerting neuroprotective and anti-inflammatory properties. Hydralazine inhibits NOS-2 (iNOS) and COX-2, and reduces the production of NO and PGEE2; meanwhile, Hydralazine scavenges reactive oxygen species and inhibits macrophage activation. Hydralazine alleviates motor dysfunction, neuropathic inflammatory pain, and formalin-induced somatic and emotional pain responses. In addition, Hydralazine directly induces DNA strand breaks and sister chromatid exchange, exhibiting certain mutagenic characteristics. Hydralazine has been widely used in studies on hypertension, various cancers (such as cervical cancer, leukemia), spinal cord injury and the mechanisms of inflammatory pain.
Benzenesulphonamide (Compound 1) is a carbonic anhydrase inhibitor. Benzenesulphonamide exhibits CA II inhibitory activity. Benzenesulphonamide reduces ROS and improves the gene expression of amyloid-β40 and 42. Benzenesulphonamide is beneficial for Alzheimer's disease. Benzenesulphonamide derivatives have anticancer, anti-inflammatory, and anticonvulsant activities. Benzenesulphonamide can be used in the research of Alzheimer's disease, epilepsy, inflammatory diseases, leukemia, melanoma, lung cancer, and colon cancer.
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