Table 2.

Effects of OPN on the expression levels of Col-2 and COMP (X̅ ±SEM)

	Group	24 h	48 h	72 h
Col-2	Control	8.12±2.10	8.51±2.31	10.14±2.18
	0.5 μM OPN	10.75±2.89	14.11±3.751*	25.63±8.791*
	1 μM OPN	15.33±4.851*	22.16±7.141*	45.86±9.251*
COMP	Control	6.35±0.80	7.18±2.89	7.32±1.02
	0.5 μM OPN	12.04±2.89	16.44±1.051*	26.23±0.621*
	1 μM OPN	20.56±1.071*	34.44±2.101*	50.02±2.301*

^*Compare with control group, P < 0.05.