Defining a Novel DYRK1A-gp130/IL-6R-pSTAT Axis That Regulates Th17 Differentiation

Overview

Journal Immunohorizons

Date 2025 Jan 23

PMID 39846842

Authors

Matthew Malueg

Keagan G Moo

Azlann Arnett

Thomas H Edwards

Susan L Ruskin

Katharina Lambert

Aditi Subramanyam

Matthew J Dufort

Vivian H Gersuk

Rebecca Partridge

Jane H Buckner

Bernard Khor

Affiliations

Soon will be listed here.

Abstract

Dysregulated differentiation of naïve CD4+ T cells into T helper 17 (Th17) cells is likely a key factor predisposing to many autoimmune diseases. Therefore, better understanding how Th17 differentiation is regulated is essential to identify novel therapeutic targets and strategies to identify individuals at high risk of developing autoimmunity. Here, we extend our prior work using chemical inhibitors to provide mechanistic insight into a novel regulator of Th17 differentiation, the kinase dual-specificity tyrosine phosphorylation-regulated kinase 1A (DYRK1A). We generated a conditional knockout mouse model to validate DYRK1A as a regulator of Th17 differentiation that acts in a dose-dependent fashion at least in part by modulating interleukin (IL)-6 signaling through multiple mechanisms. We identified a new role for DYRK1A in regulating surface expression of IL-6 receptor subunits in naïve CD4+ T cells, consistent with DYRK1A's impact on Th17 differentiation. Physiologic relevance is supported by findings in people with Down syndrome, in which increased expression of DYRK1A, encoded on chromosome 21, is linked to increased IL-6 responsiveness. Our findings highlight DYRK1A as a druggable target of broad therapeutic and prognostic interest in autoimmunity and immune function.

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