Preferential induction of Th17 cells in vitro and in vivo by Fucogalactan from Ganoderma lucidum (Reishi)

Hideyuki Yoshida, Mayu Suzuki, Ryota Sakaguchi, Ito Tani, Hitoshi Kotani, Norimasa Shudo, Akihiko Yoshimura

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


The mushroom known as Reishi (Ganoderma lucidum) has been used as an herbal medicine for tumor treatment and immune system activation. Because its effects on the differentiation of effector T helper cells have not yet been fully understood, we investigated the effects of Reishi and those of its principal ingredient, β-glucan, on the activation of dendritic cells and the differentiation of Th17 cells. Reishi extracts as well as purified β-glucan (Curdran) activated DCs and caused them to produce large amounts of IL-23. β-glucan also enhanced and sustained the transcription of IL-23p19. The MEK-ERK signaling pathway positively regulates IL-23p19 transcription in β-glucan-stimulated DCs. In a mixed leukocyte reaction, Reishi-stimulated DCs preferentially induced Th17 cells. Furthermore, orally-administrated Reishi increased the percentages of Th17 cells and the transcription levels of antimicrobial peptides. Our results show that Reishi and β-glucan activate DCs to produce large amounts of IL-23, which induces Th17 differentiation both in vitro and in vivo.

Original languageEnglish
Pages (from-to)174-180
Number of pages7
JournalBiochemical and Biophysical Research Communications
Issue number1
Publication statusPublished - 2012 May 25


  • Dendritic cell
  • ERK
  • Helper T cell
  • Interleukin
  • β-Glucan

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology


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