Fig. 3

The viability, PGE-2 release, and ECM synthesis of NP cells on PCL, PCL/2% celecoxib, and PCL/6% celecoxib nano fibers. a, b The results of phalloidin analysis after NP cells were cultured for 1 day and 4 days. c PGE2 release of NP cells detected by ELISA. d–g The results of Col2A1 (d), ACAN (e), MMP3 (f), and MMP13 (g) expression were detected by PCR. *P < 0.05 compared with the IL-1β group, ^#P < 0.05 compared with the IL-1β + PCL celecoxib group, and ^†P < 0.05 compared with the IL-1β + PCL/2% celecoxib group