Purpose: To evaluate the radiomodulatory influence of a leaf extract of Mentha piperita (Linn) on hepatic antioxidant status and lipid peroxidation in Swiss albino mice.
Materials And Methods: Animals were given either double distilled water or leaf extract of M. piperita orally (1 g/kg bwt/day) once a day for three consecutive days. Thirty min after the last treatment mice were exposed to 8 Gy of gamma radiation. Mice were autopsied at 30 min post-irradiation. Biochemical parameters were studied to assess the radioprotective effect of leaf extract of M. piperita.
Results: Animals pretreated with leaf extract of M. piperita and exposed to 8.0 Gy gamma radiation showed a significant increase in the activities of reduced glutathione content (p < 0.001), glutathione peroxidase (p < 0.005), glutathione reductase (p < 0.001), glutathione S-transferase (p < 0.005), superoxide dismutase (p < 0.005), and catalase (p < 0.005). Irradiated group pretreated with leaf extract of M. piperita showed significant decrease in malondialdehyde (MDA) formation in liver. The leaf extract of M. piperita showed strong radical scavenging activity in both the 1, 1 diphenyl-2-picryl hydrazyl radical (DPPH*) and 2, 2 azinobis (3-ethylbenzothiazoline-6-sulfonic acid) radical cation (ABTS*+) assays.
Conclusions: The results of the present investigation suggest the antioxidant and free radical scavenging activities of leaf extract of M. piperita are the likely mechanism of radiation protection.
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