From:  Mechanistic role of Nrf2 modulators in lipid peroxidation: a perspective towards carcinogenesis

 Nrf2 activators and inhibitors.

S. NO.CompoundSourceTypeMechanism of actionCancer typeReferences
Nrf2 activatorsSulforaphane (SFN) [1-isothiocyanato-4-(methylsulfonyl)-butane]Broccoli, Brussels sproutsIsothiocyanateElectrophilic modification of Keap1-Cys-151Bladder cancer[128]
Oltipraz (4-methyl-5-[2-pyrazinyl]-1,2-dithiole-3-thione) (OPZ)Cruciferous vegetablesOrganosulfur compoundElectrophilic modification of Keap1-Cys-151Various cancers in animal models[129]
Epigallocatechin gallate (EGCG)Green teaCatechinOxidizing the cysteine thiols of Keap1Prostate cancer, head and neck, and lung cancer cell lines[130]
Dimethyl fumarate (tecfidera or DMF)Synthetic drugFumaric acid esterElectrophilic modification of Keap1-Cys-151Breast, colon, melanoma, and pancreatic cancer[131]
Diallyl trisulfide (DATS)GarlicIsothiocyanateModification of Keap1-Cys-288Colorectal, breast, and bladder cancer[132]
Curcumin (CUR)Dried rhizome of Curcuma longaStilbeneElectrophilic modification of Keap1-Cys-151Gastric cancer[133]
2-Cyano-3,12-dioxooleana-1,9(11)-dien-28-oic acid (CDDO)Synthetic derivative of oleanolic acid, a naturally occurring plant compoundSynthetic triterpenoidsElectrophilic modification of Keap1-Cys-151Pancreatic cancer (e.g., Panc1, Panc28 cells), colon cancer, ovarian cancer, and diffuse large B-cell lymphoma[134]
Apigenin (4,5,7-trihydroxyflavone (Api))Celery, parsleyPlant flavoneEpigenetic modifications of Nrf2Breast, colorectal, prostate, liver, lung, skin, and oral cancers[135]
Resveratrol (3,5,4’-trihydroxystilbene (RES))Grapes, berries(E)-Stilbene derivateElectrophilic modification of Keap1-Cys-151Breast, prostate, colon, ovarian, thyroid, and melanoma[136]
CarotenoidsFruits and vegetablesNatural pigmentsPotential for cancer prevention by activating the Nrf2 pathwayInitial stage of cancer[137]
Nrf2 inhibitorsBrusatol (BRU)Brucea javanica (an evergreen shrub)Triterpene lactone compoundStimulation of Nrf2 poly-ubiquitinationColorectal, pancreatic, lung, liver, leukemia, and glioblastoma[138]
Luteolin (3’,4’,5,7-tetrahydroxyflavone (LUT))Celery, parsley, green pepperPlant flavoneNrf2 mRNA degradation, reduction of Nrf2 binding to AREsLung, breast, prostate, liver, colon, and pancreatic cancers[139]
Trigonelline (TRG)Coffee beans and many plantsCoffee-derived alkaloidPrevention of nuclear translocation of Nrf2Pancreatic cancer cell lines[140]
Ascorbic acid (vitamin C, L-ascorbic acid, AscA, AA)Citrus fruitsNatural vitaminElectrophilic modification of Keap1-Cys-151Chronic myelogenous leukemia KCL22/SR cells[141]
Retinoic acid (RA)Carrots, sweet potatoes, mangoes, papayas, and apricotsMetabolite of vitamin APrevention of nuclear translocation of Nrf2Breast, prostate, and lung cancer[142]
Chrysin (5,7-dihydroxy-2-phenyl-4H-chromen-4-one (CHR))Honey and propolisPlant flavonePrevention of nuclear translocation of Nrf2Lung, breast, liver, colon, leukemia, prostate, and melanoma[143]
QuercetinApples, various fruits, and vegetablesFlavonoidHigh concentrations can inhibit Nrf2 to increase oxidative stress and promoting cancer cell deathMalignant tumor formation[144]
Wogonin (5,7-dihydroxy-8-methoxyflavone)Root of Scutellaria baicalensisFlavonoidsNrf2 inhibitor wogonin holds good potential as an efficient natural sensitizer for anti-neoplastic resistance in human myelogenous leukemiaMyelogenous leukemia[145]
HalofuginoneRoot of Dichroa febrifuga Lour. (Blue Evergreen Hydrangea)Naturally occurring alkaloidEnhanced the chemosensitivity of cancer cells via suppressing Nrf2 activationCancer, fibrosis[146]
BerberineCoptidis RhizomaIsoquinoline alkaloidBBR could reverse the lapatinib resistance in HER2-positive breast cancer cells by upregulating the level of ROS through inhibiting the Nrf2 pathwayBreast cancer cells[147]
Brucein DSeeds of Brucea javanicaQuassinoid compoundInhibiting Nrf2 expression via promoting the ubiquitin-proteasome-dependent degradation and downregulating its downstream genes such as HO-1, NQO1, AKR1B10 and γGCSmPancreatic ductal adenocarcinoma[148]
CryptotanshinoneRoot of Salvia miltiorrhizaDiterpene quinoneInduce cell death and apoptosis in human lung carcinoma A549 (A549/DDP) cells and enhance the sensitivity to cisplatin by down-regulating the Nrf2 pathwayHuman lung carcinoma A549[149]
Ginsenoside RdActive constituents of ginsenosides, is a potent antitumor agentActive ingredients of ginsengDepletion of the expression of Nrf2 and its target genes, resulting in an enhanced sensitivity of A549 cells to cisplatin and amelioration of chemoresistanceNSCLC[150]
TriptolideTripterygium wilfordiiDiterpenoidReduced Nrf2 expression and transcriptional activity in NSCLC and liver cancer cellsMalignant tumors[151]

AA: arachidonic acid; HO-1: haem oxygenase 1; Keap1: Kelch-like ECH-associated protein 1; NQO1: NAD(P)H-quinone oxidoreductase 1; Nrf2: nuclear factor erythroid 2-related factor 2; NSCLC: non-small-cell lung cancer; ROS: reactive oxygen species; AREs: antioxidant response elements.