Project description:Cyenopyrafen is a novel acaricide with a currently unknown mode of action. We selected for high levels of cyenopyrafen resistance in a susceptible spider mite strain and previously published patterns of cross-resistance to other well-described acaricides (Khalighi et al., 2014). In addition, we also included an independent cyenopyrafen-susceptible mite strain (referred to as Akita) in this study. We performed transcriptomic analysis to identify on the molecular level how T. urticae develops resistance to this novel acaricide. Using this dataset, we show that the selection for cyenopyrafen resistance resulted in massive transcriptomic responses in T. urticae. The multi-gene family of cytochrome P450 monooxygenases (CYPs) exhibited a drastic differential expression with a significant transcriptional induction in the acaricide resistant strain. This transcriptomic study highlights the potential importance of CYPs in mite resistance to the cyenopyrafen acaricide.
Project description:Cyflumetofen is a novel acaricide on the international market with an unknown mode of action. Under laboratory conditions, we selected for high levels of cyflumetofen resistance in a susceptible mite strain and performed genome-wide gene-expression analysis. Differential expression between the resistant and susceptible strain was identified to study on the molecular level how mites develop resistance to this novel acaricide. Our results show that in T. urticae, the selection for cyflumetofen resistance resulted in a differential expression in only a limited number of genes. This transcriptomic study provides an unbiased look how cyflumetofen resistance triggers selection on the transcriptional level in T. urticae.
Project description:Cyflumetofen is a novel acaricide on the international market with an unknown mode of action. Under laboratory conditions, we selected for high levels of cyflumetofen resistance in a susceptible mite strain and performed genome-wide gene-expression analysis. Differential expression between the resistant and susceptible strain was identified to study on the molecular level how mites develop resistance to this novel acaricide. Our results show that in T. urticae, the selection for cyflumetofen resistance resulted in a differential expression in only a limited number of genes. This transcriptomic study provides an unbiased look how cyflumetofen resistance triggers selection on the transcriptional level in T. urticae. 4 replicates for one comparison; per replicate 150 mites were pooled. Mites of the derived cyflumetofen resistant spider mite (cy5-labelled) were directly compared to mites of the ancestral susceptible strain (cy3-labelled).
Project description:We identified and characterized a striking case of multiple acaricide resistance in a field population of T. urticae. Exceptionally strong resistance phenotypes, with accumulation of multiple resistance mutations and over-expression of P450s and other detoxification genes in the same field population is reported.
Project description:A R. microplus microarray was used to study differential gene expression in acaricide exposed larvae from an amitraz-resistant strain. The acaricide treatments were: organophosphate (OP), pyrethroid, ivermectin, and amitraz. The microarrays contained over 13,000 probes corresponding to each member of R. microplus gene index ESTs previously described (http://compbio.dfci.harvard.edu/tgi/cgi-bin/tgi/gimain.pl?gudb=b_microplus). Serial analysis of gene expression (SAGE) data from the OP treated R. microplus was used to verify the OP microarray data. The expression profiles of selected transcripts were verified by real time PCR. Among the significantly differentially expressed genes, were a tick legumain, involved in blood digestion, gluthathione S-transferase (GST), a detoxification enzyme involved in pesticide resistance, acyltransferase, several putative salivary sulfotransferases, and a glutamate receptor. **Note: contact person: Felix D. Guerrero email: felix.guerrero@ars.usda.gov Keywords: Rhipicephalus (Boophilus) microplus, acaricide resistance genes, organophosphates OP, microarrays, detoxification enzymes. In the study presented here, 10 hybridizations were preformed. Two technical replicates for each treatment. There were no biological replicates included in this study due to limitations on biomaterials. Expression profiles for 13601 unique ESTs were analyzed.
Project description:A R. microplus microarray was used to study differential gene expression in acaricide exposed larvae from an amitraz-resistant strain. The acaricide treatments were: organophosphate (OP), pyrethroid, ivermectin, and amitraz. The microarrays contained over 13,000 probes corresponding to each member of R. microplus gene index ESTs previously described (http://compbio.dfci.harvard.edu/tgi/cgi-bin/tgi/gimain.pl?gudb=b_microplus). Serial analysis of gene expression (SAGE) data from the OP treated R. microplus was used to verify the OP microarray data. The expression profiles of selected transcripts were verified by real time PCR. Among the significantly differentially expressed genes, were a tick legumain, involved in blood digestion, gluthathione S-transferase (GST), a detoxification enzyme involved in pesticide resistance, acyltransferase, several putative salivary sulfotransferases, and a glutamate receptor. **Note: contact person: Felix D. Guerrero email: felix.guerrero@ars.usda.gov Keywords: Rhipicephalus (Boophilus) microplus, acaricide resistance genes, organophosphates OP, microarrays, detoxification enzymes.
2008-12-31 | GSE10171 | GEO
Project description:Profiling of Dermanyssus gallinae genes involved in acaricide resistance
Project description:Synergists can counteract metabolic insecticide resistance by inhibiting detoxification enzymes or transporters. In this study we used Illumina RNA-sequencing to investigate genome-wide transcriptional responses in an acaricide resistant strain (JP-R) of the spider mite Tetranychus urticae upon exposure to synergists such as S,S,S-tributyl phosphorotrithioate (DEF), diethyl maleate (DEM), piperonyl butoxide (PBO) and cyclosporin A (CsA).
2017-10-02 | GSE98293 | GEO
Project description:Chiropteran identification assay limits of detection