Table 1. Sequences of primers used for quantitative real-time PCR.

Gene	Oligonucleotide sequence		Product size (bp)
	Forward (5′–3′)	Reverse (5′–3′)
SOX9	ATGAAGATGACCGACGAGCA	CAGTCGTAGCCTTTGAGCAC	236
Type II collagen	AGAACTGGTGGAGCAGCAAGA	AGCAGGCGTAGGAAGGTCAT	142
Aggrecan	TGAGCGGCAGCACTTTGAC	TGAGTACAGGAGGCTTGAGG	287
MMP3	TTCCTTGGATTGGAGGTGAC	AGCCTGGAGAATGTGAGTGG	248
MMP13	CCCAACCCTAAACATCCAA	AAACAGCTCCGCATCAACC	147
ADAMTS4	ACCCAAGCATCCGCAATC	TGCCCACATCAGCCATAC	246
ADAMTS5	GACAGTTCAAAGCCAAAGACC	TTTCCTTCGTGGCAGAGT	204
Bcl-2	GCCTTCTTTGAGTTCGGTGG	GAAATCAAACAGAGGCCGCA	192
U6	CGCTTCGGCAGCACATATAC	AAATATGGAACGCTTCACGA	100
β-actin	AGCGAGCATCCCCCAAAGTT	GGGCACGAAGGCTCATCATT	285