ABC	ATP-binding cassette
AKRs	aldo-keto reductases
AREs	antioxidant response elements
CBP	CREB-binding protein
CNC	Cap’n’Collar
CSC	cancer stem cell
CUL3	Cullin 3
EBV	Epstein–Barr virus
EGFR	epidermal growth factor receptor
EMT	epithelial–mesenchymal transition
GSH	glutathione
GSK-3β	glycogen synthase kinase-3β
GSTs	glutathione S-transferases
H2O2	hydrogen peroxide
HNCs	Head and neck cancers
HNSCC	head and neck squamous cell carcinoma
HPV	human papillomavirus
KEAP1	Kelch-like ECH-associated protein 1
Neh	Nrf2-ECH homology
NQO1	NAD(P)H:quinone oxidoreductase 1
Nrf2	nuclear factor erythroid 2-related factor 2
OSCC	oral squamous cell carcinoma
PI3K	phosphatidylinositol 3-kinase
ROS	reactive oxygen species
RXRα	retinoid X receptor alpha
sMAF	small musculoaponeurotic fibrosarcoma
SODs	superoxide dismutases
TRX	thioredoxin
UGTs	UDP-glucuronosyltransferases
β-TrCP	β-transducin repeat-containing protein