Abstract
Therapy with antineoplastic agents that inhibit EGFR and MEK is frequently limited by cutaneous adverse reactions, most commonly acne-like eruptions. In this issue of the JCI, Satoh et al. define a mechanism for acneiform skin toxicity wherein EGFR/MEK inhibitors cooperate with the skin commensal Cutibacterium acnes to induce IL-36γ in keratinocytes via the combined actions of Krüppel-like factor 4 and NF-κB transcription factors at the IL-36γ promoter, resulting in neutrophil recruitment. In addition to elucidating why EGFR/MEK inhibitor–induced rashes are often pustular and folliculocentric, this mechanism provides justification for the long-standing practice of management with antibiotic therapy.
Authors
Allison C. Billi, Mrinal K. Sarkar, Johann E. Gudjonsson
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