Comparative Evaluation of the Radioprotective Properties of Copper Chlorophyllin, Trolox, and Indralin in an Experiment on Mice.

The radioprotective properties of copper chlorophyllin (100 and 150 µg/g), the standard antioxidant trolox (100 and 200 µg/g), and the standard radioprotector indralin (100 and 150 µg/g) were compared in male ICR mice (CD-1) subjected to whole-body irradiation (X-ray radiation) in doses of 6, 6.5, and 6.75 Gy. Animal survival was analyzed using the Kaplan-Meier method, and the significance of differences was evaluated using the log-rank test method. Dose change factors determined using the Phinney probit analysis were 1.1, 1.0, and 1.8 for chlorophyllin, trolox, and indralin at a dose of 100 µg/g body weight, respectively. The insignificant radioprotective properties of chlorophyllin and their absence in trolox when administered prophylactically do not rule out their possible radioprotective properties like a radiomodulator that protects the body after irradiation.

Assessment of the Acute Toxicity of Chlorophyllin and Trolox for the Possibility of Studying Their Radioprotective Properties.

The acute toxicity of chlorophyllin and trolox upon intraperitoneal injection of their solutions was studied in male ICR (CD-1) mice. The LD50 of chlorophyllin was found to be 633±37.2 µg/g body weight, which is lower than the LD50 of established radioprotectors. Trolox is technically non-toxic under the conditions of our study. The results obtained highlight the need for a detailed study of the radioprotective properties of trolox and chlorophyllin.

Radioprotective Properties of Riboxin (Inosine) and Indralin under External Irradiation.

A comparative assessment of radioprotective properties of inosine nucleoside (riboxin) and recognized radioprotector indralin was carried out. We analyzed survival of male ICR CD-1 mice weighting 32.2±0.2 g exposed to external X-ray radiation at doses 6.5 and 6.75 Gy and receiving indralin at a dose of 100 or 150 µg/g body weight or riboxin (inosine) at a dose of 100 or 200 µg/g body weight before irradiation. The survival analysis was carried out by the Kaplan-Meier method. The significance was assessed by using the log-rank-test. Inosine showed a significant difference from the irradiated control only at a dose of 100 µg/g body weight at a radiation dose of 6.75 Gy. The survival of animals treated with indralin was significantly higher in comparison with not only the irradiated control group, but also with the groups receiving inosine.