The effect of endurance training on the level of tissue IL-6 and VEGF in mice with breast cancer Print

The sport exercises include a potential to prevent breast cancer. The aim of this study was assessing the prophylactic effect and adjuvant therapy of exercise on cytokines involved in angiogenesis in estrogen-dependent breast cancer.

Thirty- two female Balb/C mice were randomly assigned in 4 groups. After orientation in the environment, two groups of mice performed continuous endurance exercise for 8 weeks, and then estrogen-dependent MC4L2 cancer cells were injected to them. After that, one group of each of trained and non-trained mice performed endurance exercise 5 days per week for 6 weeks. Tumor volume was measured by a digital caliper weekly. Finally, the mice were sacrificed; tumor tissue was removed. Tumor sample was homogenized and the level of IL-6 and VEGF were measured using ELISA.

There was a significant difference in the level of IL-6 and VEGF among the groups and tumor growth (p<0.001). The level mean of IL-6 and VEGF cytokines and tumor growth in groups performing endurance exercise after malignancy (RTE and ETE) was lower than groups not performing (ETR and RTR),(P<0.05).

Due to reduction of the level of these cytokines in groups doing exercise before and after malignancy, exercise training is presumed to have adjuvant therapy in estrogen-receptor dependent tumors in addition to very effective prophylactic role.