ACAN	Aggrecan
ACI	Autologous chondrocyte implantation
ACL	Anterior cruciate ligament
ACLT	Anterior cruciate ligament transection
ADAMTS	A disintegrin and metalloproteinase with thrombospondin motifs
AI	Artificial intelligence
ARGS	Alanine–Arginine–Glycine–Serine
BMI	Body mass index
C1,2C	Type I/II collagen degradation
C2C	Type II collagen cleavage product
C2M	MMP-mediated type II collagen
CCL2	CC-chemokine ligand 2, also known as MCP-1
CH	Chondrocyte
CHI3L1	Chitinase 3-like 1
CLU	Clusterin
COLI	Collagen I
COLII	Collagen II
COMP	Cartilage oligomeric matrix protein
CPII	Procollagen II c-propeptide
CRP	C-reactive protein
CS	Chondroitin sulphate
CTX-I	C-terminal crosslinked telopeptide type I collagen
CTX-II	C-terminal crosslinked telopeptide type II collagen
CXCL	Chemokine ligand
DAMPs	Damage-associated molecular patterns
ECM	Extracellular matrix
FB	Factor B
FRI	Fluorescence reflectance imaging
gp 130	Glycol–protein 130
HMGB1	High mo­bility group box 1
IFN-γ	Interferon gamma
IL	Interleukin
IL-1ra	IL-1 receptor antagonist
IL-6R	IL-6 receptor
iNOS	Inducible NO synthase
KOOS4	Knee Injury and Osteoarthritis Outcome Score 4
LIF	Leukemia inhibitor factor
LPS	Lipopolysaccharide
MASP	MBL-associated serine proteases
MBL	Mannose binding lectin
MCL	Medial collateral ligament
MSC	Mesenchymal stem cells
MCP-1	Monocyte chemoattractant protein-1, also known as CCL2
MIP-1β	Macrophage inflammatory protein-1 beta, also known as CCL4
MIP-3α	Macrophage inflammatory protein-3 alpha, also known as CCL20
MMPs	Matrix metalloproteinases
MMX	Partial medial meniscectomy
MNC	Mononuclear cells
MRI	Magnetic resonance imaging
NLRP3	Nucleotide-binding oligomerization domain-like receptor pyrin domain-containing-3
NO	Nitric oxide
NTX-1	N-terminal telopeptides of type I collagen
OA	Osteoarthritis
OCL	Osteocalcin
OPN	Osteopontin
PG	Proteoglycan
PLGA	Poly (lactic-co-glycolic acid)
PPA	Pyrophosphate arthritis, also known as pseudogout
PRP	Platelet rich plasma
PRR	Pattern-recognition receptors
PTOA	Post-traumatic osteoarthritis
RA	Rheumatoid arthritis
SASP	Senescence-associated secretory phenotype
SCSO	Superficial zone chondrocytes
SF	Synovial fluid
sGAG	Sulfated glycosaminoglycan
SPARC	Secreted protein acidic and rich in cysteine, also known as osteonectin
sTCC	Soluble terminal complement complex
SnCs	Senescent cells
TIMP	Tissue inhibitor of metalloproteinases
TLRs	Toll-like receptors
TNF-α	Tumor necrosis factor alpha
TSG-6	Product of tumor necrosis factor alpha-stimulated gene 6
Th17	T helper 17
VEGF	Vascular endothelial growth factor