Gene expression analysis by real-time PCR in the meniscus at 4 weeks following intraarticular injection. Expression of mature miR-210, collagen type 1 alpha 1 (Col1a1), collagen type 2 alpha 1 (Col2a1), vascular endothelial growth factor (VEGF) and fibroblast growth factor-2 (FGF2) was examined using real-time PCR. Expression of miR-210, Col2a1, VEGF and FGF2 in the miR-210 group was significantly higher than that in the control and normal groups (*P < 0.05). There was no significant difference in miR-210, Col2a1, VEGF and FGF2 expression between the control and normal groups (*P < 0.05, N.S. (no significant difference), n = 5 for each group).