3′UTR	three prime untranslated region
ACI	autologous chondrocyte implantation
ACLT	anterior cruciate ligament transection
ADAMTS5	a disintegrin and metalloproteinase with thrombospondin motifs 5
AKT	AKT serine/threonine kinase 1
ALIX	ALG-2-interacting protein X
ATG4B	autophagy related 4B cysteine peptidase
CAP	chondrocyte-affinity peptide
CD	cluster of differentiation
DACT1	dishevelled binding antagonist of beta catenin 1
DDS	drug delivery system
DMM	destabilization of the medial meniscus
DMOAD	disease-modifying OA drugs
DNA	deoxyribonucleic acid
ECM	extracellular matrix
ESCRT	endosomal sorting complexes required for transport
EV	extracellular vesicle
GelMA	gelatin methacrylate
GSK-3β	glycogen synthase kinase 3 beta
hBMSC	human bone marrow-derived MSC
HDAC	histone deacetylase
Hsp	heat shock protein
hUC	human umbilical cord
IL-1β	interleukin-1 beta
ILV	intraluminal membrane vesicle
IPFP	infrapatellar fat pad
ISEV	International Society for Extracellular Vesicles
Lamp2b	lysosome-associated membrane glycoprotein 2b
lncRNA	long noncoding RNA
MCH	major histocompatibility complex
MCS	mesenchymal stem cell
miRNA	microRNA
MISEV	Minimal Information for Studies of Extracellular Vesicles
MMP13	matrix metalloproteinase 13
mTOR	mammalian target of rapamycin
MVB	multivesicular body
NSAID	non-steroidal anti-inflammatory drugs
OAK	osteoarthritis of knee
PCGEM1	prostate-specific transcript 1
PHC	primary human chondrocytes
PTEN	phosphatase and tensin homolog deleted from chromosome 10
PTGS2	prostaglandin-endoperoxide synthase 2
RA	rheumatoid arthritis
RNA	ribonucleic acid
siRNA	small interfering RNA
SMSC	synovium-derived MSC
SOX9	SRY-box transcription factor 9
SRDDS	sustained release drug delivery system
TGF-β1	transforming growth factor beta 1
TKA	total knee arthroplasty
TLR	Toll-like receptor
TSG101	tumor susceptibility gene 101
WNT5A	Wnt family member 5A
YAP	Yes-associated protein