ECM	Extracellular matrix
OTM	Orthodontic tooth movement
PDL	Periodontal ligament
hPDL-MSCs	Human periodontal ligament-derived mesenchymal stromal cells
MMPs	Matrix metalloproteinases
GCF	Gingival crevicular fluid
TIMPs	Tissue inhibitor of matrix metalloproteinases
IL	Interleukin
STS	Static tensile strain
FBS	Fetal bovine serum
ELISA	Enzyme linked immunosorbent assay
S.E.M.	Standard error of the mean
DMEM	Dulbecco’s modified Eagles medium
ISCT	International Society for Cell and Gene Therapy
qPCR	Quantitative polymerase chain reaction
OD	Optical density
ANOVA	One-way analysis of variance