AR	Adrenergic receptor
BMSC cAMP	Bone marrow-derived stem cells Cyclic adenosine monophosphate
cDNA	Complementary desoxy ribonucleic acid
DMEM/F12	Dulbecco’s modified eagle’s medium and Ham’s F-12 Medium
DPBS	Dulbecco’s phosphate buffered saline
ECL	Enhanced chemiluminescence
ERK	Extracellular signal-regulated kinases
FBS	Fetal bovine serum
GAPDH	Glyceraldehyde-3-phosphate dehydrogenase
HRP IL-1β LDH	Horse radish peroxidase Interleukin-1β Lactate dehydrogenase
mRNA	Messenger ribonucleic acid
MSC	Mesenchymal stem cells
NE	Norepinephrine
OA	Osteoarthritis
P/S	Penicillin streptomycin
PCR	Polymerase chain reaction
pERK	Phosphorylated extracellular signal-regulated kinases
PKA	Protein kinase A
pPKA	Phosphorylated protein kinase A
PVDF	Polyvinylidenfluorid
RT-PCR	Reverse-transcriptase PCR
SDS-PAGE	Sodium dodecyl sulfate polyacrylamide gel electrophoresis
TBST	Tris-buffered saline with Tween20
TH	Tyrosine hydroxylase