Abbreviation	Name	Abbreviation	Name
NiCl2	Nickel chloride	NF-κB	Nuclear factor-κB
Ni	Nickel	IL-1β	Interleukin-1β
qRT-PCR	Quantitative real-time polymerase chain reaction	IL-6	Interleukin-6
DNA	Deoxyribonucleic acid	IL-18	Interleukin-18
mRNA	Messenger ribonucleic acid	IL-2	Interleukin-2
8-OHdG	8-Hydroxy-2′-deoxyguanosine	IL-4	Interleukin-4
MDA	Malondialdehyde	IL-13	Interleukin-13
NO	Nitric oxide	NiSO4	Nickel sulfate
CuZn-SOD	Copper–zinc superoxide dismutase	Ni NWs	Nickel nanowires
Mn-SOD	Manganese superoxide dismutase	ROS	Reactive oxygen species
CAT	Catalase	NiNPs	Nickel nanoparticles
GSH-Px	Glutathione peroxidase	LPO	Low pulse occupancy
GR	Glutathione reductase	NiONPs	Nickel oxide nanoparticles
GST	Glutathione-S-transferase	MIP-1α	Macrophage inflammatory protein-1α
T-AOC	Total antioxidant capacity	MCP-1	Monocyte chemotactic protein-1
GSH	Reduced glutathione	IL-1α	Interleukin-1α
GSSG	Oxidized glutathione	Ni3S2	Nickel subsulfide
˙OH	Hydroxyl free radical	Ni(NO3)2	Nickel nitrate
iNOS	Inducible nitric oxide synthase	H&E	Haematoxylin and eosin
TNF-α	Tumor necrosis factor-α	PBS	Phosphate buffered solution
COX-2	Cyclooxygenase-2	PI	Propidium iodide staining solution
IFN-γ	Interferon-γ	GFAAS	Graphite furnace atomic absorption spectrometry