Cytotoxic, genotoxic and oxidative stress induced by 1,4-naphthoquinone in B16F1 melanoma tumor cells

Rayabandla, Sunil Kumar Mandala and Aithal, Kiran and Rao, Bhuvanagiri Nageshwar and Udupa, Nayanabhirama and Rao, Satish BS (2009) Cytotoxic, genotoxic and oxidative stress induced by 1,4-naphthoquinone in B16F1 melanoma tumor cells. Toxicology in Vitro, 23 (2). pp. 242-250.

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Quinones have diverse pharmacological properties including antibacterial, antifungal, antiviral, anti-inflammatory, antipyretic and anticancer activity. The cytotoxic potential of 1,4-naphthoquinone (NQ14) was studied against B16F1 melanoma cells grown in vitro. NQ14 treatment resulted in a concentration-dependent cytotoxicity as indicated by MTT assay and lactate dehydrogenase leakage assay. Depletion in cellular glutathione levels after 1h incubation with NQ14 correlated with the corresponding increase in reactive oxygen species generation as determined by 2',7'-dicholorofluorescein diacetate assay suggests the role of oxidative stress in cell death. The frequency of micronucleated binucleate cells increased with increasing doses of NQ14 with a corresponding decrease in the cytokinesis block proliferation index indicating the drug induced genotoxicity and cell division delay. Further, a dose-dependent decrease in the clonogenic cell survival indicated the potential of NQ14 to inhibit cell proliferation contributing to cell death. The cell death after NQ14 treatment may be attributed to apoptosis as seen in DNA ladder pattern along with necrosis as indicated in flow cytometric analysis of Annexin V/PI stained cells. Results of the present study demonstrate the cytotoxic and genotoxic potential of NQ14 by the induction of oxidative stress mediated mechanisms leading to tumor cell kill.

Item Type: Article
Uncontrolled Keywords: Apoptosis; Necrosis; 1,4-Naphthoquinone; Cytotoxicity; Glutathione; Melanoma; Micronuclei; Reactive oxygen species
Subjects: Life Sciences > MLSC Manipal
Pharmacy > MCOPS Manipal > Pharmacy Management
Depositing User: KMC Manipal
Date Deposited: 27 Feb 2013 04:11
Last Modified: 27 Feb 2013 04:11

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