Gene names	Primer sequence
β-actin	Forward:
	5′-TCCTGAGCGCAAGTACTCTG-3′
	Reverse:
	5′-GCTCAGTAACAGTCCGCCTA-3′
ADAMTS-5	Forward:
	5′-TCGAGAACCACATCCGCCTG-3′
	Reverse:
	5′-TCGTAGTGCTCCTCATGGTC-3′
SOX9	Forward:
	5′-CTACTCCACCTTCACCTAC-3′
	Reverse:
	5′-TCTGTCACCATTGCTCTT-3′
Col-Ⅱ	Forward:
	5′-CTCCTGGTACTGATGGTCCC-3′
	Reverse:
	5′-CAACATCACCTCTGTCTCCC-3'