Molecular identification and expression of two non-P450 enzymes, monoamine oxidase A and flavin-containing monooxygenase 2, involved in phase I of xenobiotic biotransformation in the Pacific oyster, Crassostrea gigas

Biochimica Et Biophysica Acta
Isabelle BoutetDario Moraga

Abstract

Marine bivalve metabolism can be perturbed by hydrocarbon and pesticide pollution in coastal ecosystems. In this study, in the Pacific oyster, Crassostrea gigas, full-length cDNAs encoding two non-P450 phase I enzymes, flavin-containing monooxygenase 2 (FMO-2) and monamine oxidase A (MAO A), were characterized. Both sequences contained the co-factor fixation motifs characteristic of their respective enzyme families. Using reverse transcription polymerase chain reaction (RT-PCR), the messenger RNA (mRNA) transcription levels of these two enzymes in tissues of oysters exposed, under experimental conditions, to hydrocarbons and two pesticide treatments were investigated. The pesticide treatments were exposure to either glyphosate or to a mixture composed of atrazine, diuron and isoproturon. The results showed a strong differential expression of FMO-2 and MAO A that was both tissue-specific as well as time- and treatment-dependent. It was also clearly demonstrated that the transcription levels of MAO A (generally considered a constitutive enzyme without external regulation) were induced by hydrocarbons and pesticides in digestive gland and inhibited by pesticides in gill tissue. Furthermore, the transcription levels of FMO-2 and MA...Continue Reading

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Citations

Oct 31, 2015·Annual Review of Animal Biosciences·Guofan ZhangLinlin Zhang
Apr 20, 2010·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·F GagnéM Gélinas
Aug 28, 2015·Chemical Research in Toxicology·Yanouk EpelboinCharlotte Corporeau
Jul 26, 2006·Expert Opinion on Drug Metabolism & Toxicology·M W AndersShey-Shing Sheu
May 12, 2018·Journal of Neural Transmission·Marco BortolatoJean C Shih
Jan 8, 2020·The Science of the Total Environment·Clarissa P FerreiraKarim H Lüchmann
Nov 21, 2017·Ecotoxicology and Environmental Safety·G V Aguirre-MartínezL M Martín-Díaz

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