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A regulatory T cell Notch4-GDF15 axis licenses tissue inflammation in asthma.


ABSTRACT: Elucidating the mechanisms that sustain asthmatic inflammation is critical for precision therapies. We found that interleukin-6- and STAT3 transcription factor-dependent upregulation of Notch4 receptor on lung tissue regulatory T (Treg) cells is necessary for allergens and particulate matter pollutants to promote airway inflammation. Notch4 subverted Treg cells into the type 2 and type 17 helper (TH2 and TH17) effector T cells by Wnt and Hippo pathway-dependent mechanisms. Wnt activation induced growth and differentiation factor 15 expression in Treg cells, which activated group 2 innate lymphoid cells to provide a feed-forward mechanism for aggravated inflammation. Notch4, Wnt and Hippo were upregulated in circulating Treg cells of individuals with asthma as a function of disease severity, in association with reduced Treg cell-mediated suppression. Our studies thus identify Notch4-mediated immune tolerance subversion as a fundamental mechanism that licenses tissue inflammation in asthma.

SUBMITTER: Harb H 

PROVIDER: S-EPMC7578174 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature

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Elucidating the mechanisms that sustain asthmatic inflammation is critical for precision therapies. We found that interleukin-6- and STAT3 transcription factor-dependent upregulation of Notch4 receptor on lung tissue regulatory T (T<sub>reg</sub>) cells is necessary for allergens and particulate matter pollutants to promote airway inflammation. Notch4 subverted T<sub>reg</sub> cells into the type 2 and type 17 helper (T<sub>H</sub>2 and T<sub>H</sub>17) effector T cells by Wnt and Hippo pathway-  ...[more]

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