The cytokine environment influence on human skin-derived T cells

FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology
Philip KienzlAdelheid Elbe-Bürger

Abstract

Skin resident T cells provide immediate immunologic responses at their specific location and play a role in the pathogenesis of skin diseases such as psoriasis. Recently, IL-9-producing T cells were described as a major T-cell subtype present in the skin, but knowledge on the biology and in situ regulation of this T-cell subtype is scarce. Here, we investigated the cytokine influence on skin T cells with focus on IL-9-producing T cells because a better understanding of their biology may identify novel therapeutic approaches. Healthy human skin biopsies were cultured either in the presence of IL-2, IL-4, and TGF-β [T helper (Th)9-promoting condition (Th9-PC)] or IL-2 and IL-15 [standard condition (SC)]. Paired analysis of enzymatically isolated skin T cells and emigrated T cells after 4 wk of skin culture showed significant alterations of T-cell phenotypes, cytokine production, and IL-9-producing T-cell frequency. RNA sequencing analysis revealed differentially regulated pathways and identified CXCL8 and CXCL13 as top up-regulated genes in Th9-PC compared with SC. Functionally supernatant of stimulated skin-derived T cells, CXCL8 and CXCL13 increased neutrophil survival. We report that the cytokine environment alters skin-derive...Continue Reading

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Methods Mentioned

BETA
biopsies
flow cytometry
density gradient centrifugation
ELISA
RNA-seq

Software Mentioned

FlowJo
Zen
plot
MetaMorph
FACSuite
MA
GraphPad
LegendPlex
Prism

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