Effects of aryl hydrocarbon receptor signaling on the modulation of Th1/Th2 balance

Takaaki Negishi, Yutaka Kato, Osamu Ooneda, Junsei Mimura, Tomonari Takada, Hidenori Mochizuki, Masayuki Yamamoto, Yoshiaki Fujii-Kuriyama, Shoji Furusako

Research output: Contribution to journalArticlepeer-review

106 Citations (Scopus)


An orally active antiallergic agent, M50367, skews the Th1/Th2 balance toward Th1 dominance by suppressing naive Th cell differentiation into Th2 cells in vitro. Administration results in the suppression of IgE synthesis and peritoneal eosinophilia in vivo. In this report, we determined that M50354 (an active metabolite of M50367) was a ligand for the aryl hydrocarbon receptor (AhR); the immunological effects of this compound on in vitro Th1/Th2 differentiation from naive Th cells and Th1/Th2 balance in vivo were manifested through binding to AhR. These effects were completely abolished in AhR-deficient mice. AhR expression in the naive Th cell was significantly up-regulated by costimulation of TCR and CD28. Suppression of naive Th cell differentiation into Th2 cells via binding of M50354 to AhR was associated with inhibition of GATA-3 expression in Th cells. In addition, forced expression of a constitutively active form of AhR or activation of AhR by the addition of representative ligands suppressed naive Th cell differentiation into Th2 cells. Based on these results, we conclude that AhR functions as a modulator of the in vivo Th1/Th2 balance through activation in naive Th cells.

Original languageEnglish
Pages (from-to)7348-7356
Number of pages9
JournalJournal of Immunology
Issue number11
Publication statusPublished - 2005 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology


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