Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Transcription profiling of human Vg9/Vd2 T cells after 72h stimulation with HMB-PP in the presence of IL-2, IL-4, or IL-21

ABSTRACT: Hver2.1.1 microarrays containing ~15,000 genes were used to characterize the gene expression profiles of Vg9/Vd2 T cells upon 72h stimulation with HMB-PP in the presence of IL-2, IL-4, or IL-21.

INSTRUMENT(S): ScanArray [PerkinElmer]

ORGANISM(S): Homo sapiens

SUBMITTER: Adrian Hayday

PROVIDER: E-MEXP-763 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Distinct cytokine-driven responses of activated blood gammadelta T cells: insights into unconventional T cell pleiotropy.

Vermijlen David D Ellis Peter P Langford Cordelia C Klein Anne A Engel Rosel R Willimann Katharina K Jomaa Hassan H Hayday Adrian C AC Eberl Matthias M

Journal of immunology (Baltimore, Md. : 1950) 20070401 7

Human Vgamma9/Vdelta2 T cells comprise a small population of peripheral blood T cells that in many infectious diseases respond to the microbial metabolite, (E)-4-hydroxy-3-methyl-but-2-enyl pyrophosphate (HMB-PP), expanding to up to 50% of CD3(+) cells. This "transitional response," occurring temporally between the rapid innate and slower adaptive response, is widely viewed as proinflammatory and/or cytolytic. However, increasing evidence that different cytokines drive widely different effector ...[more]

PMID: 17371987

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Project description:Whirling disease, caused by the pathogen Myxobolus cerebralis, afflicts several salmonid species. Rainbow trout are particularly susceptible and suffer high mortality rates. The disease is persistent and spreading in hatcheries and natural waters of several countries, including the U.S., and the economic losses associated with whirling disease have been extremely large. In this study, gene expression profiling was conducted for resistant and susceptible rainbow trout strains following pathogen exposure with the primary objective of identifying specific genes associated with whirling disease resistance. Several genes were significantly up-regulated in skin following pathogen exposure for both the resistant Hofer and susceptible Trout Lodge rainbow trout strains. For both strains, response to infection appears to be associated with the interferon system. Metallothionein is differentially expressed between the resistant and susceptible strains and is a good candidate for future studies due to its diverse functional roles in inflammation and immune response. The present study has provided the first examination into the genetic basis underlying rainbow trout’s immune response and resistance to the whirling disease pathogen. The identified genes have allowed us to gain initial insight into the molecular mechanisms associated with a salmonid host’s immune response and resistance to whirling disease infection. Keywords: Disease state comparison. 1st comparison: exposed vs control. 2nd comparison: resistant vs susceptible strains Resistant (Hofer) and susceptible (Trout Lodge) rainbow trout strains were exposed to 2,000 triactinomyxons (whirling disease pathogen) per fish. Unexposed controls for each strain were treated identically to exposed other than their lack of pathogen exposure. After twenty-four hours, caudal fin tissue was collected for RNA extraction. Amplified RNA was competitively hybridized (exposed versus control) for each strain. Four biological replicates were used for each experimental condition and a balanced block design was incorporated.

Project description:We wished to determine the changes in gene expression that occurred in S. ratti parasitic females as an infection progressed and thus as these stages are exposed to an anti-S. ratti immune response. To do this we compared gene expression in parasitic females recovered 6 days p.i. (i.e. no or very low immune response) with those recovered at 15 days p.i. (i.e. high immune response); for convenience, we refer to these as parasitic females subject to "low immune pressure" and "high immune pressure", respectively. These days were chosen because previous analyses of S. ratti parasitic females have shown significant differences in the size, appearance etc. of worms at these time points. The experimental design used, was to have at least three biological replicates for each sample (i.e. three independent preparations of the relevant worm samples and their RNA) and to have at least three technical replicates (i.e. independent, separate cDNA synthesis, amplification and hybridization etc.) for each biological replicate. For each hybridisation (below) a dye-swap was used i.e. each sample to be used in a hybridisation was labelled, separately, with each of the two dyes (below).<br> <br> 21,085 ESTs were sequenced from various S. ratti stage-specific libraries, of which 14,761 resulted in sequence data above a quality threshold that were then submitted to public databases. 11,551 clones were derived from the S. ratti parasitic libraries of which 7,385 produced sequence data (above a quality threshold); all of these 7,385 clones were arrayed together with a random sample of 1,619 of clones for which no sequence data were available. These 7,385 ESTs are highly redundant since they represent 2,963 contigs and 2,125 clusters, both including 1,220 singletons (i.e. clusters or contigs containing only one EST). Notwithstanding this redundancy, they were used in the microarray construction for two reasons: (i) this approach was less error-prone than attempting to select a unique clone set and (ii) this in-built redundancy provides many replicates of individual contigs and clusters, which can be exploited in quality-control analyses. In addition to these 9,004 S. ratti clones, the following controls were included: 281 EST clones from the mixed iL3/free-living adult library (representing 173 contigs and 167 clusters, 67 of which are singletons) to ensure that gene expression in the parasitic and free-living stages could be differentiated; 230 commercially available controls (Amersham Biosciences UK, Ltd.). 12 poly-A and 457 spotting buffer-only controls. Thus, in total 9,984 spots were arrayed.

Dataset Information

Transcription profiling of human Vg9/Vd2 T cells after 72h stimulation with HMB-PP in the presence of IL-2, IL-4, or IL-21

Publications

Distinct cytokine-driven responses of activated blood gammadelta T cells: insights into unconventional T cell pleiotropy.

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