Figure 4. mRNA expression of bone repair factors. Type I collagen (A), type III collagen (B), osteocalcin (OCN) (C), bone morphogenetic protein-2 (BMP-2) (D), and BMP-4 (E) after treatment with single-walled carbon nanotubes (SWCNT) or sodium hyaluronate (HY)-SWCNT. *P<0.05 compared to control and #P<0.05 compared to SWCNT (two-way ANOVA followed by Bonferroni post-hoc test).
