Fig. 2.

Sodium azide inhibits wound healing after LLLT Treatment. (a and b). A mechanical scratch wound was generated in U2OS cells, and the cells were treated with $50\text{-}\mu \mathrm{M}$ sodium azide, a cytochrome C oxidase inhibitor. The wound closure rate was quantified after 24 h. The images being shown are at 24-h post-treatment. The green area marks the wound. Bar, $100\mu \mathrm{m}$. Data represent the $\text{mean}\pm \mathrm{SEM}$ of at least three separate experiments with $n=12$ per experiment. ****$P<0.0001$ and ***$P<0.001$ compared to untreated control.