Inducibility of the Drosophila melanogaster cytochrome P450 gene, CYP6A2, by phenobarbital in insecticide susceptible or resistant strains

Brun, A.; Cuany, A.; Mouél, T Le; Bergé, Jean-Baptiste; Amichot, Marcel

doi:10.1016/s0965-1748(96)00036-7

Cited by 82 publications

(59 citation statements)

References 25 publications

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“…Several of the genes shown to be transcriptionally regulated by phenobarbital or atrazine have been reported before to be associated with metabolic resistance to insecticides, particularly Cyp6a2 (Waters et al, 1992;Brun et al, 1996;Amichot et al, 2004) and Cyp6g1 (Daborn et al, 2002) but also Cyp6a8, Cyp12d1, Cyp4e2 and Cyp12a4 (Amichot et al, 1994;Maitra et al, 2000;Le Goff et al, 2003;Pedra et al, 2004;Bogwitz et al, 2005). Some of these genes are also inducible by other chemicals, such as DDT (Brandt et al, 2002).…”

Section: Discussionmentioning

confidence: 99%

Xenobiotic response in Drosophila melanogaster: Sex dependence of P450 and GST gene induction

Goff

Hilliou

Siegfried

et al. 2006

Insect Biochemistry and Molecular Biology

146

109

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Section: Discussionmentioning

confidence: 99%

Xenobiotic response in Drosophila melanogaster: Sex dependence of P450 and GST gene induction

Goff

Hilliou

Siegfried

et al. 2006

Insect Biochemistry and Molecular Biology

146

109

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“…Generally, the expression patterns of cytochrome P450 genes are not well characterized. Cyp6a2 expression has been localized to the midgut, fat body, and Malpighian tubules in adult D. melanogaster (40). Also, a recent gene expression study using microarrays generally found cytochrome P450 genes to be expressed predominantly in the midgut of late third-instar larvae and not in the salivary glands, epidermis, central nervous system, or wing disk (41).…”

Section: Discussionmentioning

confidence: 99%

Cyp12a4 confers lufenuron resistance in a natural population of Drosophila melanogaster

Bogwitz

Chung

Magoc

et al. 2005

Proc. Natl. Acad. Sci. U.S.A.

124

112

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Lufenuron is an insect growth regulator insecticide mainly used for the control of the cat flea. To understand mechanisms of resistance to lufenuron, we have characterized lufenuron resistance in a natural population of Drosophila melanogaster. In this study we have used precise genetic mapping to identify a mechanism of lufenuron resistance: the overexpression of the cytochrome P450 gene Cyp12a4. Cyp12a4 is predicted to encode a mitochondrial cytochrome P450 enzyme. Expression of Cyp12a4 in D. melanogaster third-instar larvae was detected in the midgut and Malpighian tubules of both lufenuron-resistant and wild-type strains. The level of Cyp12a4 expression in the midgut is higher in the lufenuron-resistant strain than in wild-type strains. Driving the expression of Cyp12a4 in the midgut and Malpighian tubules by using the GAL4͞UAS gene expression system results in lufenuron resistance, but it does not result in resistance to three other insecticide classes. Transgenic expression of Cyp12a4 in a ubiquitous expression pattern results in late embryonic lethality, suggesting that high-level ectopic expression of Cyp12a4 is detrimental to development. cytochrome P450 ͉ insecticide resistance ͉ insect growth regulator ͉ genetic mopping I nsecticide resistance is an important example of natural selection (1). Resistance is predominantly mediated either by changes in the metabolism of the insecticide or by changes in the sensitivity of insecticide targets (2). Insecticide resistance mediated by target site modification is well documented for most commonly used insecticides (3-7). Molecular mechanisms of resistance due to increased insecticide metabolism by cytochrome P450s, esterases, and glutathione S-transferases are less well understood. Resistance is commonly found to be the result of up-regulation of single or multiple members of these enzyme families (8-13); however, resistance due to structural changes in enzymes has also been documented (14-16).Lufenuron is an insect growth regulator insecticide, mainly used in the control of the cat flea, Ctenocephalides felis. It is active against larval developmental stages, causing cuticular lesions resulting from the disruption of chitin synthesis (17). Lufenuron is also active against Diptera, including Drosophila melanogaster (18). To understand possible resistance mechanisms to lufenuron, we have used D. melanogaster as a model. Lufenuron resistance in D. melanogaster was originally reported in populations from two widely separated locations in the United States (19). As it was not expected that D. melanogaster had been in contact with lufenuron, it was postulated that this resistance resulted from cross-resistance that had evolved to an earlier, widely used insecticide (19). Subsequently, it was found that resistance to lufenuron was caused by the up-regulation of the cytochrome P450 gene Cyp6g1, which confers resistance to numerous insecticide classes, and that Cyp6g1-mediated resistance is widespread (8,20).Here we describe the discovery of a mechanism of lufenuron r...

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“…Enhanced levels of oxidases in resistant insects result from constitutive overexpression rather than amplification (34,35). The mechanisms of oxidase overproduction in resistance are under extensive investigation and appear to result from both cisand trans-acting factors, perhaps associated with the phenomenon of induction (36)(37)(38).…”

Section: B Amentioning

confidence: 99%

Insecticide Resistance and Vector Control

Brogdon

McAllister²

1999

Journal of Agromedicine

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Inducibility of the Drosophila melanogaster cytochrome P450 gene, CYP6A2, by phenobarbital in insecticide susceptible or resistant strains

Cited by 82 publications

References 25 publications

Xenobiotic response in Drosophila melanogaster: Sex dependence of P450 and GST gene induction

Xenobiotic response in Drosophila melanogaster: Sex dependence of P450 and GST gene induction

Cyp12a4 confers lufenuron resistance in a natural population of Drosophila melanogaster

Insecticide Resistance and Vector Control

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