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In this study, we investigated the protective effect of vitamin E against methotrexate (MTX)-induced hepatotoxicity by quantitative liver 99mTc-phytate uptake and liver imaging and to compare its effect with histopathology in rat. Rats were divided into five groups as control, solvent, Vit E (100 mg/kg), MTX (20 mg/kg), Vit E + MTX and. Vit E was intraperitoneally administrated for 17 days before MTX injection and continued for 4 days. 99mTc-phytate was injected through the tail of rats after the drug administration. The percentage of the injected dose per gram of liver and spleen tissues (%ID/g) was calculated. Liver imaging was obtained with gamma camera. In other experiment, liver of treated rats were assessed for histopathology. 99mTc-phytate uptake per gram tissue of the livers as %ID/g in control, solvent, MTX, Vit E, Vit E + MTX and MTX groups were 8.99% ± 1.37, 8.53% ± 2.91, 8.65% ± 3.84, 3.22% ± 1.09 and 8.38% ± 2.68. Vit E administration with MTX resulted in a significant increasing in the level of %ID/g. Vit E treatment improved the shape of live in planner image. Histophatological examinations showed a protective effect of Vit E against MTX-induced hepatoxicity in rats. The results showed that Vit E significantly attenuates the MTX-induced hepatotoxicity in rats, and 99mTc-phytate uptake in liver as well as liver image to be acceptable techniques for assessment of liver and spleen damages and/or their tissues protective effects in animal model.

The use of 99mTc-phytate for assessment the protective effect of vitamin E against hepatotoxicity induced by methotrexat in rat