[en] A 30-day survival rate experiment was carried out, and the assays of peripheral blood leukocytes, bone marrow DNA content, colony forming units of the spleen (CFU-S), and organ index parameters were analyzed to evaluate the protective effect of a nitric oxide-specific scavenger, Fe²⁺-diethyldithiocarbamate complex (Fe(DETC)₂), on radiation-injured mice. The results showed that compared with the irradiation group, the 30 d survival rate, peripheral blood leukocytes, bone marrow DNA content, CFU-S, and organ index were significantly different from those in the mice treated with different doses. In particular, DETC was administered intraperitoneally at a dose of 300 mg/kg, which increased the survival rate by about 43%, and changes in the number of white blood cells, bone marrow DNA content, and CFU-S were statistically significant (p < 0.01). It is suggested that Fe(DETC)₂, a nitric oxide scavenger, has a protective effect on radiation-injured mice. (authors)