CD300f associates with IL-4 receptor α and amplifies IL-4-induced immune cell responses

Itay Moshkovits, Danielle Karo-Atar, Michal Itan, Hadar Reichman, Perri Rozenberg, Netali Morgenstern-Ben-Baruch, Dana Shik, Aroa Ejarque-Ortiz, Alon Y. Hershko, Linjie Tian, John E. Coligan, Joan Sayós, Ariel Munitz*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


IL-4 receptor (R) α, the common receptor chain for IL-4 and IL-13, is a critical component in IL-4- and IL-13-mediated signaling and subsequent effector functions such as those observed in type 2 inflammatory responses. Nonetheless, the existence of intrinsic pathways capable of amplifying IL-4Rα-induced responses remains unknown. In this study, we identified the myeloid-associated Ig receptor CD300f as an IL-4-induced molecule in macrophages. Subsequent analyses demonstrated that CD300f was colocalized and physically associated with IL-4Rα. Using Cd300f-/- cells and receptor cross-linking experiments, we established that CD300f amplified IL-4Rα-induced responses by augmenting IL-4/IL-13-induced signaling, mediator release, and priming. Consistently, IL-4- and aeroallergen-treated Cd300f-/- mice displayed decreased IgE production, chemokine expression, and inflammatory cell recruitment. Impaired responses in Cd300f-/- mice were not due to the inability to generate a proper Th2 response, because IL-4/IL-13 levels were markedly increased in allergen-challenged Cd300f-/- mice, a finding that is consistent with decreased cytokine consumption. Finally, CD300f expression was increased in monocytes and eosinophils obtained from allergic rhinitis patients. Collectively, our data highlight a previously unidentified role for CD300f in IL-4Rα-induced immune cell responses. These data provide new insights into the molecular mechanisms governing IL-4Rα-induced responses, and may provide new therapeutic tools to target IL-4 in allergy and asthma.

Original languageEnglish
Pages (from-to)8708-8713
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number28
StatePublished - 14 Jul 2015


  • CD300f
  • Eosinophil
  • IL-4 receptor
  • Inflammation
  • Macrophage


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