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Cochliomyia macellaria

ABSTRACT: Identification and Characterization of MicroRNAs from the Secondary Screwworm Fly Cochliomyia macellaria (Diptera: Calliphoridae)

PROVIDER: PRJNA275118 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR1796360.fastq.gz	Fastqsanger.gz
	SRR1796333.fastq.gz	Fastqsanger.gz
	SRR1796365.fastq.gz	Fastqsanger.gz

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analysis of expression profiles and differential allelic expression of third-instar larvae (L3) that survived treatment with OP insecticide.

Project description:The emergence of insecticide resistance is a fast-paced example of the evolutionary process of natural selection. In our study, we investigated the molecular basis of resistance in the myiasis-causing fly Cochliomyia hominivorax (Diptera: Calliphoridae) to organophosphates (OP). By sequencing the RNA from surviving larvae treated with OP (resistant condition) and non-treated larvae (control condition), we identified genes displaying condition-specific polymorphisms, as well as those differentially expressed. Both analyses revealed that resistant individuals have altered expression and allele-specific expression of genes involved in proteolysis (specifically serine-endopeptidase), olfactory perception and cuticle metabolism, among others. We also confirmed that resistant individuals carry almost invariably the Trp251Ser mutation in the esterase E3 known to confer OP and Pyrethroid resistance. Interestingly, genes involved in metabolic and detoxifying processes (notably cytochrome P450s) were found under-expressed in resistant individuals. An exception to this were esterases, which were found up-regulated. These observations suggest that reduced penetration and aversion to OP contaminated food, may be important complementary strategies of resistant individuals. The specific genes and processes found are an important starting point for future functional studies. Their role in insecticide resistance merits consideration to better the current pest management strategies.

2020-11-18 | GSE145822 | GEO

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