AhR	Aryl hydrocarbon receptor
BaP	Benzo(a)pyrene
BMSCs	Bone marrow mesenchymal stem cells
Cyp1A/1B	cytochrome P450 1a/1b
DMEM	Dulbecco’s modified Eagle’s medium
DMF	3′,4′-dimethoxyflavone
FBS	Heat-inactivated fetal bovine serum
IDO-1 or 2	Indoleamine 2,3-dioxygenase-1 or 2
KYN	kynurenine
RANKL	Receptor activator of nuclear factor kappa-B ligand
siRNA	Small interfering RNA
TCDD	2,3,7,8-tetrachlorodibenzo-p-dioxin
TDO	Tryptophan 2,3-dioxygenase
TRAP	Tartrate-resistant acid phosphatase
β-NF	β-naphthoflavone