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- W2897613262 abstract "Hyper-IgE syndromes comprise a group of inborn errors of immunity. STAT3-deficient hyper-IgE syndrome is characterized by elevated serum IgE levels, recurrent infections and eczema, and characteristic skeletal anomalies. A loss-of-function biallelic mutation in IL6ST encoding the GP130 receptor subunit (p.N404Y) has very recently been identified in a singleton patient (herein referred to as PN404Y) as a novel etiology of hyper-IgE syndrome. Here, we studied a patient with hyper-IgE syndrome caused by a novel homozygous mutation in IL6ST (p.P498L; patient herein referred to as PP498L) leading to abrogated GP130 signaling after stimulation with IL-6 and IL-27 in peripheral blood mononuclear cells as well as IL-6 and IL-11 in fibroblasts. Extending the initial identification of selective GP130 deficiency, we aimed to dissect the effects of aberrant cytokine signaling on T-helper cell differentiation in both patients. Our results reveal the importance of IL-6 signaling for the development of CCR6-expressing memory CD4+ T cells (including T-helper 17-enriched subsets) and non-conventional CD8+T cells which were reduced in both patients. Downstream functional analysis of the GP130 mutants (p.N404Y and p.P498L) have shown differences in response to IL-27, with the p.P498L mutation having a more severe effect that is reflected by reduced T-helper 1 cells in this patient (PP498L) only. Collectively, our data suggest that characteristic features of GP130-deficient hyper-IgE syndrome phenotype are IL-6 and IL-11 dominated, and indicate selective roles of aberrant IL-6 and IL-27 signaling on the differentiation of T-cell subsets." @default.
- W2897613262 created "2018-10-26" @default.
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- W2897613262 date "2018-10-11" @default.
- W2897613262 modified "2023-10-13" @default.
- W2897613262 title "Selective loss of function variants in <i>IL6ST</i> cause Hyper-IgE syndrome with distinct impairments of T-cell phenotype and function" @default.
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- W2897613262 doi "https://doi.org/10.3324/haematol.2018.194233" @default.
- W2897613262 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6395342" @default.
- W2897613262 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30309848" @default.
- W2897613262 hasPublicationYear "2018" @default.
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