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The levels of IL-4 (a) and IL-13 (b) in control, melatonin (MLT), radiation (RAD), and radiation + melatonin (RAD+MLT) groups. Results show an increase in IL-4 following irradiation of rats’ heart tissues. However, IL-4 decreased when melatonin was administered before irradiation. Results show no significant change in IL-13 for all groups; a: significant compared to control group; b; significant compared to radiation group, (ANOVA, Tukey’s HSD, p < 0.05).
