[Radioprotective effect of synthetic immunomodulators on hemopoietic CFU-S]

The radiotherapeutic effect of thymogen (Glu-Trp) and thymohexin (Arg-Lys-Asp-Val-Tyr-Arg) synthetic peptide immunomodulators was investigated. Both thymogen and thymohexin were demonstrated to be able to reduce the damaging effect of ionizing radiation (1 Gy) on CFU-S by half. The treatment by these preparations after irradiation at dose of 4 Gy leads to more intensive restoration of CFU-S population as compared with control.