µg	Microgravity
ACAN	Aggrecan
bFGF	Basic fibroblast growth factor
CGM	Chondrocyte growth medium
COL10A1	Collagen alpha-1(X) chain
COL1A1	Collagen, type I, alpha 1,
COL2A1	Collagen, type II, alpha 1
DMEM	Dulbecco’s Modified Eagle Medium
ECM	Extracellular matrix
EGF	Epidermal growth factor
ERK	Extracellular signal-regulated kinase
FCS	Fetal calf serum
IL6	Interleukin 6
IL8	Interleukin 8
ITGB1	Integrin beta-1
JAK	Janus kinase
MAPK	Mitogen-activated protein kinase
MMP1	Matrix metalloproteinase-1
MMP2	Matrix metalloproteinase-2
MMP13	Matrix metalloproteinase-13
PFA	Paraformaldehyde
OA	Ostheoarthritis
PRG4	Proteoglycan 4
qPCR	Quantitative real-time PCR
R3 IGF-1	R3 insulin-like growth factor-1
RPM	Random Positioning Machine
RUNX2	Runt-related transcription factor 2
RUNX3	Runt-related transcription factor 3
RWV	Rotating Wall Vessel
SOD3	Extracellular superoxide dismutase
SOX5	SRY-related HMG-box transcription factor 5
SOX6	SRY-related HMG-box transcription factor 6
SOX9	SRY-related HMG-box transcription factor 9
SPP1	Osteopontin
STAT	Signal transducer and activator of transcription
TEM	Transmission electron microscopy
TGFB1	Transforming growth factor beta 1
VEGF	Vascular endothelial growth factor