Mechanisms of myricetin mutagenicity in V79 cells

Involvement of radicalar species

I. Duarte Silva, J. Gaspar, A. Rodrigues, G. Gomes da Costa, A. Laires, José Rueff

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Myricetin is a flavonol that is widely distributed in edible plants and although it has been proved to be genotoxic in bacteria and to induce significant concentration-dependent nuclear DNA degradation concurrent with lipid peroxidation, very little is known about its mechanisms of genotoxicity. In this work we tried to evaluate the role of rat cytochromes P450 in the genotoxicity of myricetin and to study the role that radicalar species may have in its mutagenicity. The results obtained show that the genotoxicity of myricetin as assessed by the induction of chromosomal aberrations is not different in V79 cells lines genetically engineered for the expression of rat cytochromes P450 1Al, 1A2, and 2B1, compared to parental cell lines. We have also been able to show that reactive oxygen species resulting from the autooxidation of myricetin at pH values above neutrality have an important role in its mutagenicity. Therefore, undersome conditions, myricetin can act as a prooxidant.

Original languageEnglish
Pages (from-to)253-268
Number of pages16
JournalTeratogenesis Carcinogenesis And Mutagenesis
Volume16
Issue number5
DOIs
Publication statusPublished - 1996

Fingerprint

Rats
Cells
Cytochrome P-450 CYP2B1
Cell Line
Cytochrome P-450 CYP1A2
Edible Plants
Aberrations
Chromosome Aberrations
Cytochrome P-450 Enzyme System
Lipid Peroxidation
Reactive Oxygen Species
Bacteria
myricetin
Lipids
Degradation
DNA
3-hydroxyflavone

Keywords

  • Chromosomal aberrations
  • Mutagenicity
  • Myricetin
  • Oxygen radicals
  • VB79 cells

Cite this

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title = "Mechanisms of myricetin mutagenicity in V79 cells: Involvement of radicalar species",
abstract = "Myricetin is a flavonol that is widely distributed in edible plants and although it has been proved to be genotoxic in bacteria and to induce significant concentration-dependent nuclear DNA degradation concurrent with lipid peroxidation, very little is known about its mechanisms of genotoxicity. In this work we tried to evaluate the role of rat cytochromes P450 in the genotoxicity of myricetin and to study the role that radicalar species may have in its mutagenicity. The results obtained show that the genotoxicity of myricetin as assessed by the induction of chromosomal aberrations is not different in V79 cells lines genetically engineered for the expression of rat cytochromes P450 1Al, 1A2, and 2B1, compared to parental cell lines. We have also been able to show that reactive oxygen species resulting from the autooxidation of myricetin at pH values above neutrality have an important role in its mutagenicity. Therefore, undersome conditions, myricetin can act as a prooxidant.",
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Mechanisms of myricetin mutagenicity in V79 cells : Involvement of radicalar species. / Duarte Silva, I.; Gaspar, J.; Rodrigues, A.; Gomes da Costa, G.; Laires, A.; Rueff, José.

In: Teratogenesis Carcinogenesis And Mutagenesis, Vol. 16, No. 5, 1996, p. 253-268.

Research output: Contribution to journalArticle

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AU - Gaspar, J.

AU - Rodrigues, A.

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AU - Laires, A.

AU - Rueff, José

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