PDL	Periodontal ligament
PDLFs	Periodontal ligament fibroblasts
LJLE	Litsea japonica leave extract
LPS	Lipopolysaccharide
IL-6	Interleukin-6
IL-8	Interleukin-8
SD	Standard deviation
TLR	Toll-like receptor
mRNA	Messenger ribonucleic acid
IL-1β	Interleukin-1 beta
ROS	Reactive oxygen species
iNOS	Inducible nitric oxide synthase
MOI	Multiplicity of infection
TPP	Thiamine pyrophosphate
CFU	Colony forming unit
MTT	3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide
PCR	Polymerase chain reaction
GAPDH	Glyceraldehyde 3-phosphate dehydrogenase
ELISA	Enzyme-linked immunosorbent assay
DCF	Dichlorofluorescein fluorescence