Antioxidant, Anticlastogenic And Radioprotective Effect of Coleus Aromaticus on Chinese Hamster Fibroblast Cells (V79) Exposed to Gamma Radiation

Rao, Satish BS and Shanbhoge, R and Upadhya, Upadhya D and Jagetia, GC and Adiga, Satish Kumar and Kumar, P and Guruprasad, K and Gayathri, P (2006) Antioxidant, Anticlastogenic And Radioprotective Effect of Coleus Aromaticus on Chinese Hamster Fibroblast Cells (V79) Exposed to Gamma Radiation. Mutagenesis, 21 (4). pp. 237-242.

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Coleus aromaticus (Benth, Family: Laminaceae), Indian Oregano native to India and Mediterranean, is well known for its medicinal properties. A preliminary study was undertaken to elucidate in vitro free radical scavenging potential and inhibition of lipid peroxidation by C.aromaticus hydroalcoholic extract (CAE). Anti-clastogenic and radioprotective potential of CAE were studied using micronucleus assay after irradiating Chinese hamster fibroblast (V79) cells. CAE at 10, 20, 40, 60, 80, 100 and 120 mug/ml resulted in a dose-dependent increase in radical scavenging ability against various free radicals viz., 1,1-diphenyl-2-picrylhydrazyl (DPPH), 2,2-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), superoxide anion (O(2)(*-)), hydroxyl (OH(*)) and nitric oxide (NO(*)) generated in vitro. A maximum scavenging potential was noticed at 100 mug/ml and a saturation point was reached thereafter with the increasing doses of CAE. The free radical scavenging potential of the extract was in the order of DPPH > ABTS > Superoxide > Hydroxyl > Nitric oxide. CAE also exhibited a moderate inhibition of lipid peroxidation in vitro, with a maximum inhibition at 60 mug/ml (33%), attaining saturation at higher doses. The extract also rendered protection against radiation induced DNA damage, as evidenced by the significant (P < 0.05) decrease in the percentage of radiation-induced micronucleated cells (MN) and frequency of micronuclei (total). A maximum anticlastogneic effect/ radioprotection was noticed at a very low concentration i.e., 5 mug/ml of CAE, treated 1 h prior to 2 Gy of gamma radiation. A significant (P < 0.0001) anticlastogenic/radioprotective effect was also observed when the cells were treated with an optimum dose of CAE (5 mug/ml) 1 h prior to 0.5, 1, 2 and 4 Gy of gamma radiation compared with the respective radiation control groups. Overall, our results established an efficient antioxidant, anticlastogenic and radioprotective potential of CAE, which may be of great pharmacological importance.

Item Type: Article
Subjects: Medicine > KMC Manipal > Clinical Embryology
Life Sciences > MLSC Manipal
Depositing User: KMC Manipal
Date Deposited: 22 Aug 2011 04:00
Last Modified: 17 Aug 2021 10:15

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