DOAJ	directory of open access journals
GCF	gingival crevicular fluid
IL	interleukin
JAM-1	junctional adhesion molecule-1
LGI	low-grade inflammation
LPS	lipopolysaccharide
MDPI	multidisciplinary Digital Publishing Institute
MTI	maladaptive trained immunity
NETs	neutrophil extracellular traps
OMS	Oncostatin M
OMVs	outer membrane vesicles
PAMPs	pathogen associated molecular patterns
PAR2	protease activated receptor 2
ROS	reactive oxygen species
TLR	toll-like receptor
TNFα	tumor necrosis factor α
TJ	tight junction
ZO-1	zonula occludens-1
BOP	Bleeding on Probing
FITC	Fluorescein-5-isothiocyanate (FITC)