Archives of Dermatological Research

, 301:151

Administration of Ag85B showed therapeutic effects to Th2-type cytokine-mediated acute phase atopic dermatitis by inducing regulatory T cells

  • Hitoshi Mori
  • Keiichi Yamanaka
  • Kazuhiro Matsuo
  • Ichiro Kurokawa
  • Yasuhiro Yasutomi
  • Hitoshi Mizutani
Original Paper

DOI: 10.1007/s00403-008-0873-y

Cite this article as:
Mori, H., Yamanaka, K., Matsuo, K. et al. Arch Dermatol Res (2009) 301: 151. doi:10.1007/s00403-008-0873-y

Abstract

Increase in the number of patients with atopic dermatitis (AD) has been recently reported. T helper (Th) cells that infiltrate AD skin lesions are Th2-type dominant; reduced exposure to environmental Th1-cytokine-inducing microbes is believed to contribute to the increased number of AD patients. Regulatory type immune responses have been also associated with the occurrence of AD. It has been reported that antigen 85B (Ag85B) purified from mycobacteria is a potent inducer of Th1-type immune response in mice as well as in humans. In this study, we have examined the effect of plasmid DNA encoding Ag85B derived from Mycobacterium kansasii on AD skin lesions induced by oxazolone (OX) application. Th2-cytokine mediated mouse AD model with immediate type response followed by a late phase reaction was developed by repeated applications of low-dose OX to sensitized mice. Mice were immunized with plasmid DNA encoding cDNA of Ag85B before OX sensitization or during repeated elicitation phase. Both therapies were associated with significant suppression of immediate type response, clinical appearance, dermal cell infiltration, reduced IL-4 production, and augmented IFN-γ mRNA expression compared to placebo-treated mice. Additionally, increased number of Foxp3+ regulatory T cells were observed in the skin sections in Ag85B treated mice. The results of this study suggest that Ag85B DNA vaccine is a potential therapy for Th2 type dermatitis.

Keywords

Atopic dermatitisAntigen 85BRegulatory T cell

Abbreviations

AD

Atopic dermatitis

Th

T helper

BCG

Bacillus Calmette-Güerin

Treg

Regulatory T cell

Ag85B

Antigen 85B

OX

Oxazolone

Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Hitoshi Mori
    • 1
  • Keiichi Yamanaka
    • 1
  • Kazuhiro Matsuo
    • 2
  • Ichiro Kurokawa
    • 1
  • Yasuhiro Yasutomi
    • 3
    • 4
  • Hitoshi Mizutani
    • 1
  1. 1.Department of DermatologyMie University Graduate School of MedicineTsuJapan
  2. 2.Research and Development DepartmentJapan BCG LaboratoryTokyoJapan
  3. 3.Laboratory of Immunoregulation and Vaccine Research, Tsukuba Primate Research CenterNational Institute of Biomedical InnovationTsukubaJapan
  4. 4.Department of ImmunoregulationMie University Graduate School of MedicineTsuJapan