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Rational identification of novel drug targets and vaccine candidates against the cattle tick, Rhipicephalus microplus

ABSTRACT: Rational identification of novel drug targets and vaccine candidates against the cattle tick, Rhipicephalus microplus

PROVIDER: PRJNA915116 | ENA |

REPOSITORIES: ENA

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Transcriptional responses in bovine skin during blood feeding of the cattle tick, Rhipicephalus microplus.

Project description:We examined gene expression induced by Rhipicephalus microplus bites on host skin of tick-resistant and tick-susceptible breeds of bovines, Nelore and Holstein respectively, when they underwent a primary infestation.

2017-04-02 | E-MTAB-4908 | biostudies-arrayexpress

Comparative microarray analysis of midgut tissues from feeding Rhipicephalus microplus and Rhipicephalus decoloratus adult females

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Peripheral WBC from Brahman and Holstein-Friesian cattle infested with the cattle tick Rhipicephalus microplus

Project description:This trial was undertaken to examine the perhipheral cellular and antibody response of cattle following infestation with the cattle tick, Rhipicephalus microplus. The information from the Affymetrix gene expression data is used to complement other measurements of immune function such as cellular subset composition and antibody response in cattle of high (Brahman) and low (Holstein-Friesian) resistance to the cattle tick. Keywords: Disease state analysis

2008-11-26 | GSE13725 | GEO

Rational identification of novel drug targets and vaccine candidates against the cattle tick, Rhipicephalus microplus

Project description:Control of complex parasites via vaccination remains challenging, with the current combination of vaccines and small drugs remaining the choice of control strategy. The development of new vaccines against complex endo- and ectoparasites remains challenging and more studies are providing evidence that multicomponent vaccines will be needed for the development of protective vaccines against parasites. The development of multicomponent vaccines, require an in-depth understanding of parasite biology which remains insufficient for ticks. With the rapid development and spread of acaricide resistance in ticks, new targets for acaricide development also remains to be identified, along with novel targets that can be exploited for the design of lead compounds. In this study, we analysed the differential gene expression of Rhipicephalus microplus ticks that were fed on cattle vaccinated with a multi-component vaccine (Bm86 and 3 putative Bm86-binding proteins). The data was scrutinised for the identification of vaccine targets, small drug targets and novel pathways that can be evaluated in future studies. Limitations associated with targeting novel proteins for vaccine and/or drug design is also discussed and placed into the context of challenges arising when targeting large protein families and intracellular localised proteins. Lastly, this study provide insight into how Bm86-based vaccines may reduce successful uptake and digestion of the bloodmeal and overall tick fecundity.

2023-10-23 | GSE221646 | GEO

Transcriptomic analysis of Rhipicephalus microplus hemocytes from female ticks infected with Babesia bovis or Babesia bigemina

Project description:To understand the effect of Babesia infection on Rhipicephalus microplus hemocyte gene expression, we performed high throughput RNA-sequencing using samples collected from Rhipicephalus microplus uninfected tick hemolymph and infected with either Babesia bigemina or Babesia bovis. We evaluated gene expression differences that may be attributed to tick immune defense to babesial infection.

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Comparative microarray analysis of midgut tissues from feeding Rhipicephalus microplus and Rhipicephalus decoloratus adult females

Project description:Transcriptional profiling of midgut tissues isolated from Rhipicephalus microplus and Rhipicephalus decoloratus females at day 20 post infestation. This enabled the identification of transcripts that are species-specific or shared between the two tick species tested. A direct comparison (Balanced block) was performed: Midgut tissues collected on day 20 (post infestation) from R. microplus was compared to that of R. decoloratus. Biological replicates: 3 ; Technical replicates: 1.

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SAGE in Rhipicephalus (Boophilus) microplus following OP treatment of larvae from OP resistant/susceptible strains.

Project description:Organophosphate resistant and susceptible tick larvae from laboratory strains of the southern cattle tick, Rhipicephalus (Boophilus) microplus were exposed to low doses of the organophosphate (OP) acaricide, coumaphos. Serial Analysis of Gene Expression (SAGE) was used to analyze differential gene expression in response to OP treatment and to compare the responses in OP-treated and untreated resistant and susceptible tick larvae. ** note: Contact person is Felix D. Guerrero. email: felix.guerrero@ars.usda.gov Keywords: SAGE, acaricide response, organophosphate.

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Intestine proteome of Rhipicephalus microplus tick reveal key molecular features associated with resistant to ivermectin

Project description:Rhipicephalus microplus is among the critical tick parasite of cattle farming globally. However, the massive use of ivermectin last decades induced the generation of the tick-resistant population. Unfortunately, despite extensive research the mode of action of ivermectin remains unclear. Due to the limited molecular information related to the resistance of R. microplus to ivermectin, we carried out a midgut comparative proteomics study between susceptible and resistant tick. Our tissues specificity approach also included tandem mass tags (TMT) couple to synchronous precursor selection (SPS)-MS3. Our proteomics scrutiny exhibits key biological process associated with blood digestion and anticoagulation in midgut. In addition, we could observe the significant shutdown of the translation mechanism in susceptible thinks. At the same time, resistant thick exhibited the over-accumulation of cytochrome P450, glutathione-S-transferase, and ABC transporters. A similar trend was observed in proteins like glutathione peroxides glutaredoxin, sulfiredoxin, and disulfide-isomerase, which suggest a possible activation of the oxidative metabolism as a potential strategy to cope with ivermectin treatment.

2024-01-29 | PXD031231 | Pride

Microarray analysis of gene expression in acaricide exposed Rhipicephalus (Boophilus) microplus.

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

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