IL-22, but not IL-17, Dominant environment in cutaneous T-cell lymphoma

Tomomitsu Miyagaki, Makoto Sugaya, Hiraku Suga, Masahiro Kamata, Hanako Ohmatsu, Hideki Fujita, Yoshihide Asano, Yayoi Tada, Takafumi Kadono, Shinichi Sato

Research output: Contribution to journalArticlepeer-review

85 Citations (Scopus)


Purpose: Both patients with cutaneous T-cell lymphoma (CTCL) and those with atopic dermatitis (AD) have pruritus, T H2-biased T cells, and a tendency to have bacterial infections, suggesting a common pathologic basis for these two diseases. Recently, interleukin (IL)-22-producing T cells were reported in skin of patients with AD. In this study, we investigated expression levels of T H22- and T H17-related molecules in lesional skin and sera isolated from patients with CTCL. Experimental Design: Skin biopsies and sera were collected from patients with CTCL or psoriasis and from healthy volunteers. Protein andmRNAexpression levels of IL-22, IL-17A, IL-17F, IL-23p19, IL-10, IL-4, CCL20, CCR6, IL-8, and IL-20 were examined in lesional tissue and a subset of these molecules in sera. Phosphorylation of STAT3 was also assessed in lesional skin of CTCL and psoriasis by immunohistochemistry. Results: IL-22, IL-10, IL-4, CCL20, and CCR6mRNAand protein levels, but not IL-17A, IL-17F, IL-23p19, IL-8, or IL-20, were significantly elevated in lesional skin of CTCL. Phosphorylation of STAT3 was detected in epidermis of CTCL skin. Moreover, serum IL-22, IL-10, and CCL20 levels were increased in CTCL and correlated with disease severity. Conclusions: Our results suggest that IL-22 is important in establishing the tumor microenvironment for CTCL. Enhanced expression of CCL20 may explain epidermal hyperplasia and migration of CCR6 + cells, such as Langerhans cells, into lesional skin. Relatively low expression of IL-17 may explain the lack of neutrophils in lesions of CTCL, which correlates with bacterial infections that commonly occur in skin affected by CTCL.

Original languageEnglish
Pages (from-to)7529-7538
Number of pages10
JournalClinical Cancer Research
Issue number24
Publication statusPublished - 2011 Dec 15
Externally publishedYes

ASJC Scopus subject areas

  • Oncology
  • Cancer Research


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