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- W2896730122 abstract "Background Insect venom immunotherapy (VIT) is used to protect patients against Hymenoptera insects' venom allergy (HVA), which can result in severe systemic or even life-threatening conditions. Molecular mechanisms triggered by VIT remain largely unknown. Objective To compare genome-wide gene expression of patients with severe HVA prior to VIT and 12 months after. Methods Whole blood RNA samples were analyzed on an expression array. Results from differential expression obtained on a microarray platform were confirmed by quantitative real -time PCR (qRT-PCR). Subsequently we applied unsupervised clustering. Relative blood cell proportions and gene expression profiles were used as an input to csSAM to compute cell specific differential gene expression. Finally, transcription factor enrichment analysis was performed in MotifLab. Results & conclusions Comparison of genome-wide expression patterns for whole blood and qRT-PCR experiments revealed no significantly up and/or down regulated genes. This has been corroborated by unsupervised clustering. We found a significant upregulation of 26 genes in macrophages, of 15 genes in monocytes and 2 genes in T regulatory cells (Tregs). Analysis of the promoter sequences of these upregulated genes revealed a significant over-representation of binding motifs specific for kruppel-like factor 4, retinoic acid receptor gamma, and vitamin D receptor. Our results indicate that changes of gene expression invoked by VIT in peripheral blood may have a too small effect to be detected by conventional biostatistical approaches. When blood cell composition was taken into account we uncovered numerous changes of cell-specific gene expression. Given the regulatory implications we hypothesize that above-mentioned alterations may contribute to activation of anti-inflammatory signals in the innate branch of the immune system." @default.
- W2896730122 created "2018-10-26" @default.
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- W2896730122 date "2018-12-01" @default.
- W2896730122 modified "2023-10-02" @default.
- W2896730122 title "Genome-wide analysis of gene expression after one year of venom immunotherapy" @default.
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- W2896730122 doi "https://doi.org/10.1016/j.imlet.2018.10.005" @default.
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