Protective Effect of Nardostachys jatamansi Against Radiation-induced Damage at Biochemical and Chromosomal Levels in Swiss Albino Mice.

The effect of 100 mg of ethanol extract of Nardostachys jatamansi was studied on the mice exposed to 6 Gy electron beam radiation. Treatment of mice with 100 mg of Nardostachys jatamansi extract for 15 days before irradiation reduced the symptoms of radiation sickness when compared with the nondrug treated irradiated groups. The irradiation of animals resulted in an elevation in lipid peroxidation and reduction in glutathione, total antioxidants and antioxidant enzymes such as glutathione peroxidase and catalase activities. Irradiated group had shown micronucleus in the bone marrow cells. Treatment of mice with Nardostachys jatamansi extract before irradiation caused a significant depletion in lipid peroxidation followed by significant elevation in reduced glutathione, total antioxidants, glutathione peroxidase and catalase activity. It also showed a reduction in the micronucleus formation in the bone marrow cells. Our results indicate that the radioprotective activity of Nardostachys jatamansi extract may be due to free radical scavenging and increased antioxidant level in mice.