The interactive effect of vitamin E supplementation along with endurance and sprint exercise trainings on brain content of vascular endothelial growth factor

Hydrogen peroxide (H2O2) increases the vascular endothelial growth factor (VEGF), while these two factores are affected by exercise and vitamin E. The aim of the present study was to investigate the effect of vitamin E succinate supplementation along with continuous and interval exercise trainings on VEGF and H2O2 in rat brain.

Fifty-six Albino Wistar rats (12 years old, 250 to 300 gr) were randomly divided into 7 groups: control (C), vehicle (V), supplements (S), continuous training (CT), continuous training + supplement (CT+S), interval training (IT), interval training + supplementation (IT+S). Rat brain was dissected after 6 weeks of continuous (80% VO2max) and interval exercise training (95 to 100% VO2max) along with vitamin E supplementation (60 mg/kg body weight/day). The content of VEGF and H2O2 were measured using sandwich ELISA and colorimetric assay, respectively.Data were analysed using one-way analysis of variance followed by Bonferroni post-hoc comparison at p.

Brain H2O2 (p=0.01 and p=0.001, respectively) level and VEGF (p=0.007 and p=0.001, respectively) increased significantly in both of CT and IT groups compare to C group; while the IT resulted in a greater increase in H2O2 and VEGF than those of CT (p=0.02 for both of H2O2 and VEGF). However, vitamin E supplementation had no significant effect on H2O2 (p=0.59, p=0.99 and p=0.51, respectively) and brain VEGF (p=0.99, p=0.99 and p=0.67, respectively) in S, CT + S and IT + S groups. Furthermore, the results showed a positive correlation between BDNF and H2O2 (r=0.73, p=0.001).

Performing of exercise training with maximal sprint can result in greater increase in some factors involved in angiogenesis than continuous training; however vitamin E succinate supplementation has not effect on these angiogenic gains.