Evaluation of an Immunomodulator Drug as a Radioprotectant on Human Peripheral Blood Lymphocytes In Vitro

Background: IMOD™, a selenium enriched extract of the plants Tanacetum vulgare, Urtica dioica, and Rosa canina, has an excellent effect on oxidative stress. In this study, we investigated the radioprotective effects of this immunomodulatory drug on human peripheral blood lymphocytes.Methods: Peripheral blood samples obtained from venipuncture of the brachial vein were treated with IMOD™ (۵, ۱۰, ۱۵, ۲۰ μl) for ۳۰ min and Cobalt ۶۰ γ-rays (۰.۲۵, ۰.۵, ۱, ۲ Gy) as the test groups and cultured with the control. We used the micronuclei assay, cell death detection, and cell toxicity assay to analyze the treatment effects.Results: The frequency of micronuclei were ۱.۶۶ (۰ Gy), ۵.۳۳ (۰.۲۵ Gy), ۹.۶۷ (۰.۵ Gy), ۱۷.۶۷ (۱ Gy), and ۲۳.۶۷ (۲ Gy) in the irradiated lymphocytes (P<۰.۰۰۱). The percentage of micronuclei frequency reduced to ۲۰%, ۲۶.۸۳%, ۳۷.۶۸%, ۱۶%, and ۲۰.۴۷% with IMOD™. Apoptosis and necrosis decreased significantly in the IMOD™ treated groups (P<۰.۰۵).Conclusion: IMOD™ may protect these cells against ionizing radiation.