ΔΨm	Mitochondrial membrane potential
ARS	Acute radiation syndrome
BH4	Tetrahydrobiopterin
CD	Cluster of differentiation molecule
c-Kit+	Stem cell factor positive
DRF	Dose reduction factor
Flk+	Endothelial progenitor cell marker positive
G-CSF	Granulocyte colony-stimulating factor
GFRP	GTPCH feedback regulatory protein
GI-ARS	Gastrointestinal acute radiation syndrome
GRAS	Generally recognized as safe
Gy	Gray
GTPCH	Guanosine triphosphate cyclohydrolase 1
H-ARS	Hematopoietic acute radiation syndrome
HMG-CoA	3-Hydroxy-3-methylglutaryl-coenzyme A
IL	Interleukin
Lin−	Lineage negative
IκBα	Inhibitor of κBα
NF-κB	Nuclear factor-κB
PTX	Pentoxifylline
U.S. FDA	United States Food and Drug Administration