[Effects and mechanism of bFGF on rat myoblast oxidative injury induced by hydrogen peroxide].

Objective: To explore the protective role of basic fibroblast growth factor (bFGF) on attenuating hydrogen peroxide-induced injury in cultured rat myoblasts.

Methods: Cultured rat myoblasts at growth phase were randomly divided into four groups (=6):control group (control), bFGF group (bFGF), model group(HO) and the treatment group (bFGF + HO). Model group was treated with 100 mol/L hydrogen peroxide for 4h. B-cell lymphoma-2 (Bcl-2) positive particles were detected by immunohistochemistry; Reactive oxygen species (ROS) and expression for Bcl-2 associated X protein (Bax), Bcl-2 and Cytochrome C (Cyt. C) fluorescence were observed under the invented microscope; Cyt. C and Poly ADP-ribose polymerase(PARP)protein were assessed by Western blot.

Results: Compared with control group, the myoblats in the model group showed low expression of Bcl-2 positive particles, accompanied by high expression of ROS level and Cyt. C fuorescence ( < 0.05); Compared with model group, bFGF enhanced Bcl-2 activity of the myoblasts, and significantly downregulated Cyt. C and PARP expression ( < 0.05).

Conclusions: bFGF could attenuate oxidative injury of rat myoblasts induced by hydrogen peroxide, which mechanism might be related to enhanced Bcl-2 and reduced ROS, Cyt. C levels.