Table 1.

Primer sequences used for the RT-PCR.

Gene	Forward Primers (5′–3′)	Reverse Primers (5′–3′)
COL2	GCAGCTGTGTGCAGGAGGGGAAG	TGGCAGTGGCGAGGTCAGTAGGG
ACAN	GACTCATTGTTAGAGGACAGCCA	CACTCCCAAAAAGAACTCCAGAT
PRG4	GGCAGGGAATGTGACTGTGATG	TGGGTGAGCGTTTAGTTGTTGA
SOX9	CGGCGGAGGAAGTCGGTGAAGA	AGTGGTGGGTGGGGTGGTGGTG
GAPDH	CATCAAGAAGGTGGTGAAGCAGG	AGCATCGAAGGTAGAGGAGTGGG

COL2: type II collagen; ACAN: aggrecan; PRG4: proteoglycan 4 precursors; SOX9: SRY-related high mobility group-box gene 9; and GAPDH: glyceraldehyde-3-phosphate dehydrogenase.