Increased interleukin-19 expression in cutaneous T-cell lymphoma and atopic dermatitis

Tomonori Oka, Makoto Sugaya, Naomi Takahashi, Rina Nakajima, Sayaka Otobe, Miyoko Kabasawa, Hiraku Suga, Tomomitsu Miyagaki, Yoshihide Asano, Shinichi Sato

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


Interleukin-19 (IL-19), a pro-inflammatory cytokine known to stimulate the production of T helper type 2 (Th2) cytokines, is induced by IL-17A and highly expressed in the lesional skin of psoriasis and atopic dermatitis (AD). This aim of this study was to investigate whether IL-19 is involved in cutaneous T-cell lymphoma (CTCL) and AD. IL-19 levels were significantly higher in the sera of patients with AD and those with advanced-stage CTCL than in normal controls, correlating significantly with clinical disease markers. IL- 19 mRNA levels in lesional skin of both diseases were significantly elevated. Immunohistochemical staining revealed that IL-19 was expressed in the epidermis of AD skin and CTCL skin. In vitro, IL-17A and IL-4 increased IL-19 mRNA expression in human keratinocytes. Thus, IL-19 was increased in the sera and skin of AD and CTCL. These results suggest that IL-19 is important for bridging Th17 to Th2 in these diseases.

Original languageEnglish
Pages (from-to)1172-1177
Number of pages6
JournalActa Dermato-Venereologica
Issue number10
Publication statusPublished - 2017 Nov
Externally publishedYes


  • Atopic dermatitis
  • Cutaneous T-cell lymphoma
  • IL-17A
  • IL-19
  • IL-4
  • Keratinocytes

ASJC Scopus subject areas

  • Dermatology


Dive into the research topics of 'Increased interleukin-19 expression in cutaneous T-cell lymphoma and atopic dermatitis'. Together they form a unique fingerprint.

Cite this