Evaluation of curcumin and cisplatin-induced DNA damage in PC12 cells by the alkaline comet assay
| Autor: | Catarina Satie Takahashi, Raquel Alves dos Santos, Lus nia Maria Greggi Antunes, Graciela Cristina dos Santos, Leonardo Meneghin Mendonça, Maria de Lourdes Pires Bianchi |
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| Rok vydání: | 2010 |
| Předmět: |
Curcumin
DNA damage Health Toxicology and Mutagenesis Antineoplastic Agents Toxicology medicine.disease_cause PC12 Cells chemistry.chemical_compound Image Processing Computer-Assisted medicine Animals Nucleoid Cisplatin Dose-Response Relationship Drug Chemistry General Medicine Rats Comet assay Biochemistry Comet Assay Antimutagen DNA Genotoxicity DNA Damage Mutagens medicine.drug |
| Zdroj: | Human & Experimental Toxicology. 29:635-643 |
| ISSN: | 1477-0903 0960-3271 |
| DOI: | 10.1177/0960327109358731 |
| Popis: | A very appropriate method for antigenotoxicity evaluation of antioxidants is the comet assay, since this analytical method detects initial DNA lesions that are still subject to repair; in other words, lesions that are very associated to damages resulting from the generation and subsequent action of reactive species. However, a solid evaluation should be developed in order to avoid inexact interpretations. In our study, besides the association of curcumin with cisplatin, curcumin and cisplatin agents were also tested separately. Classical genotoxic compounds, when tested by the comet assay, present an increase in the nucleoid tail; however, the cisplatin treatment has resulted in a decrease of DNA migration. This was an expected effect, as the cross-links between cisplatin and DNA decrease the DNA electrophoretic mobility. A similar effect was observed with the curcumin treatment, which decreased the nucleoid tail. Such effect was not expected and reinforced the necessity of including in the study, separate treatment groups with potentially antigenotoxic substances. The comet assay results have been analyzed using specific software for image analysis, as well as the classical visual analysis, and we have observed that the effect of decrease in DNA electrophoretic mobility was more easily observed when the data were analyzed by the software. |
| Databáze: | OpenAIRE |
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