Unmodified hydrated С fullerene molecules exhibit antioxidant properties, prevent damage to DNA and proteins induced by reactive oxygen species and protect mice against injuries caused by radiation-induced oxidative stress.

Unmodified hydrated С fullerene molecules (CUHFM) were shown to reduce the formation ROS in water and 8-oxoguanine in DNA upon ionizing radiation impact. CUHFM efficiently eliminate long-lived protein radicals arising after irradiation. In irradiated mice CUHFM reduce the rate of single/double-strand DNA breaks and amount of chromosomal breaks. The radioprotective activity of CUHFM was estimated by the survival rate of animals; the dose modification factor for animal survival was 1.3. Hematological tests showed that CUHFM injection in mice prior to irradiation results in a decrement of irradiation-induced leucopenia and thrombocytopenia. Histological analysis testified that CUHFM provide significant protection of small intestine tissues in mice against irradiation-induced damage. The obtained data assume that the radioprotective properties of CUHFM are determined by their antioxidant, antiradical and DNA-protective qualities. Thus, it was demonstrated that CUHFM are a novel antioxidant and radioprotective agent capable of substantial reduction of the harmful effects of ionizing radiation.