Interleukin-17A is not expressed by CD207(+) cells in Langerhans cell histiocytosis lesions.

Allen, Carl E; McClain, Kenneth L · Nat Med · 2009

basic_science · Level V

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Abstract

Interleukin-17 (IL-17A) is a pro-inflammatory cytokine that has recently been implicated in pathogenesis of Langerhans Cell Histiocytosis (LCH), a potentially fatal disease characterized by lesions including CD207+ (langerin +) histiocytes. However, in this study we were unable to identify IL-17A gene expression in Langerhans cell lesions, and plasma levels of IL-17A did not correlate with disease activity. Therefore, this study does not support a central role for IL-17A in LCH pathogenesis.

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