TABLE 1.

PCR primers used in the study

Gene name	NCBI or Ensemble accession no.	Sequence
Hprt	AF020294	5′-ATGGACAGGACTGAACGGCTTGCT-3′
		5′-GGTCTGCATTGTTTTGCCAGTGTCA-3′
PRG4	ENSOCUG00000027187	5′-TTACCGATGTCTGGGGCATACCTTC-3′
		5′-TGGGCAGTGATATAGCTGAGGTGACC-3′
MMP13	AF059201	5′-GGGTCCCTGATGTGGGTGAATACAAC-3′
		5′-GGAGGAAAAGCGTGAGCCAGAAGA-3′
Agc	L38484	5′-CCTCACCCCGAGAATCAAATGGAG-3′
		5′-GAACACAACACCTTTCACCACGACCT-3′
RALDH2	ENSOCUT00000016946	5′-GTCATCAAAACCCTTCGCTATTACGC-3′
		5′-CGCAATCTTGTCTATGCCAATGTGAG-3′
Cyp26a1	ENSOCUT00000000178	5′-TCAACCGAACTCCTTTTTGGAGGC-3′
		5′-GCCGAAGGGTCTCCTTAATGACACA-3′
CRABP1	ENSOCUT00000000431	5′-GAGAATTTCGACGAGCTGCTCAAG-3′
		5′-TGATGTAGAACTGGTCTCCGTCCTG-3′
CRABP2	ENSOCUT00000007224	5′-TCTACATCAAAACCTCCACCACCGT-3′
		5′-GAAGCCTCTGTTCGCACACCATT-3′
RBP	ENSOCUT00000010524	5′-TCTCCTGAATAACTGGGACGTGTGC-3′
		5′-TTTGTCGTCACAGTAACCGTTGTGC-3′
ADAMTS-4	AF247707	5′-CGGAACGGTGGCAAGTATTGTGAG-3′
		5′-GGCAGGTGAGTTTGCATTGGTCTC-3′
Col2A1	D83228	5′-GGTGACTACTGGATAGACCCCAACCAA-3′
		5′-TGAAGTGGAAGCCGCCATTGATG-3′
Runx2	ENSOCUT00000011739	5′-CTCCGAAATGCCTCTGCTGTTATGA-3′
		5′-CCTGCCTGGGGTCTGTAATCTGACT-3′