Interleukin 6 and basic fibroblast growth factor from cultured human fibroblasts in high glucose medium

Low level laser therapy is suggested as a new therapeutic method in diabetic wound healing. This survey aimed to evaluate the effects of low level laser on human fibroblasts cultured in high glucose cultures. The human skin fibroblasts were cultured under standard condition. The cells were cultured in high glucose culture medium (15mM/L) for a week and two weeks before laser irradiation. The irradiation was carried out with Helium-Neon (He-Ne) laser unit on the case groups. Control cells did not receive laser. The cells were irradiated with three doses of 0.5, 1 and 2 J/cm2 on three consecutive days. The releasing rates of Interleukin 6 and Fibroblast growth factor were evaluated by ELISA (enzyme-linked immunoabsorbent assay). Data were analyzed by student t test or Mann-Whitney-U test. All three doses of 0.5 (p=0.049), 1 J/cm2 (p=0.027) had a stimulatory effect on releasing rate of IL-6 of the fibroblasts cultured in culture medium with high glucose concentration in comparison with hyper glycemic non irradiated cells. Low level laser therapy (LLLT) with energy density of 2 J/cm2 induced the release of bFGF of the fibroblasts cultured in culture medium with high glucose concentration for one and two weeks (p=0.047 and p=0.04 respectively). This study showed that LLLT has stimulatory effects on the release of Interleukin 6 and basic fibroblast growth factor from cultured human fibroblasts in high glucose medium in one week and two-week tests.