表 A1. RT-PCR primer sequence.

RT-PCR引物序列

Genes	Primer sequence (5′-3′)
COL2A1	F: 5′-GCCCAACTGGCAAACAAGGAGAC-3′ R: 5′-GCAGGGCCAGAAGTACCCTGATC-3′
ACAN	F: 5′-GGCTTCCCACCGTCCCAGCAG-3′ R: 5′-GAAGTGTCTGTGCTGCCTGTGAA-3′
Caspase3	F: 5′- GGCATGGAGAACACTGAAAAC -3′ R: 5′- GCGAATCTGTTTCTTTGCATG-3′
SOX9	F: 5'-GCGTATGAATCTCCTGGACC-3' R: 5'-GCGGCTGGTACTTGTAATCC-3'
GAPDH	F: 5′-CCTGGAGAAACCTGCCAAGTAT-3′ R: 5′-TAGCCCAGGATGCCCTTTAGT-3′