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Introduction: Royal jelly is a substance that appears to be effective on immune system and it appears to be effective on both prevention and growth of cancer cells. In this study, we aimed to carry out a research to investigate the effect of royal jelly on the growth of WEHI-164 fibrosarcoma cell in syngenic Balb/c mice. Methods: In an experimental study, 28 male Balb/c mice were designated into four equal groups. The mice were subcutaneously injected with 5x105 WEHI-164 tumor cells on the day zero in the chest area of the animal. Animals in groups 1 to 4 were orally given 100, 200, 300 mg/kg of royal jelly or vehicle, respectively. In every individual mouse, the tumour size was measured every 2 days from day 5 (days 5, 7, 9, 11, 13, 15 and 17). Data were statistically analyzed using Kruskal-Wallis and Mann Whitney-U tests. Result: Our results showed that the mean size of tumor in case group was significantly smaller than the control group in days 11, 13, 15 and 17 (P |
