Expression of inflammatory (Ccl2, Il6) and catabolic
(Adamts4, -5, Mmp9,
-13) genes were all increased in a dose dependent manner. These
increases were significant at all doses of IL-1α. Expression of chondrogenic genes
(Acan, Col2a1) were decreased following treatment with
1 ng/ml of IL-1α, but unchanged at lower doses. A 1-way ANOVA was used with
Tukey’s post-hoc test. Data are presented as mean ± SEM, and groups not
connected by the same letter are significantly different from each other.