TWEAK transactivation of the epidermal growth factor receptor mediates renal inflammation
S Rayego‐Mateos, JL Morgado‐Pascual… - The Journal of …, 2013 - Wiley Online Library
The Journal of Pathology, 2013•Wiley Online Library
TWEAK, a member of the TNF superfamily, binds to the Fn14 receptor, eliciting biological
responses. EGFR signalling is involved in experimental renal injury. Our aim was to
investigate the relationship between TWEAK and EGFR in the kidney. Systemic TWEAK
administration into C57BL/6 mice increased renal EGFR phosphorylation, mainly in tubular
epithelial cells. In vitro, in these cells TWEAK phosphorylated EGFR via Fn14 binding,
ADAM17 activation and subsequent release of the EGFR ligands HB‐EGF and TGF α. In …
responses. EGFR signalling is involved in experimental renal injury. Our aim was to
investigate the relationship between TWEAK and EGFR in the kidney. Systemic TWEAK
administration into C57BL/6 mice increased renal EGFR phosphorylation, mainly in tubular
epithelial cells. In vitro, in these cells TWEAK phosphorylated EGFR via Fn14 binding,
ADAM17 activation and subsequent release of the EGFR ligands HB‐EGF and TGF α. In …
Abstract
TWEAK, a member of the TNF superfamily, binds to the Fn14 receptor, eliciting biological responses. EGFR signalling is involved in experimental renal injury. Our aim was to investigate the relationship between TWEAK and EGFR in the kidney. Systemic TWEAK administration into C57BL/6 mice increased renal EGFR phosphorylation, mainly in tubular epithelial cells. In vitro, in these cells TWEAK phosphorylated EGFR via Fn14 binding, ADAM17 activation and subsequent release of the EGFR ligands HB‐EGF and TGFα. In vivo the EGFR kinase inhibitor Erlotinib inhibited TWEAK‐induced renal EGFR activation and downstream signalling, including ERK activation, up‐regulation of proinflammatory factors and inflammatory cell infiltration. Moreover, the ADAM17 inhibitor WTACE‐2 also prevented those TWEAK‐induced renal effects. In vitro TWEAK induction of proinflammatory factors was prevented by EGFR, ERK or ADAM17 inhibition. In contrast, EGFR transactivation did not modify TWEAK‐mediated NF‐κB activation. Our data suggest that TWEAK transactivates EGFR in the kidney, leading to modulation of downstream effects, including ERK activation and inflammation, and suggest that inhibition of EGFR signalling could be a novel therapeutic tool for renal inflammation. Copyright © 2013 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
