The metalloporphyrin antioxidant, MnTE-2-PyP, inhibits Th2 cell immune responses in an asthma model

Paiboon Jungsuwadee, Michael R. Weaver, Fabienne Gally, Rebecca E. Oberley-Deegan

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

MnTE-2-PyP, a superoxide dismutase mimetic, inhibited OVA-induced airway inflammation in mice suggesting an effect on Th2 responsiveness. Thus, we hypothesized that MnTE-2-PyP may alter dendritic cell-Th2 interactions. Bone marrow derived dendritic cells (DC) and OVA323-339-specific Th2 cells were cultured separately in the presence or absence of MnTE-2-PyP for 3 days prior to the co-culturing of the two cell types in the presence of an OVA323-339 peptide and in some cases stimulated with CD3/CD28. MnTE-2-PyP-pretreated DC inhibited IL-4, IL-5 and IFNγ production and inhibited Th2 cell proliferation in the DC-Th2 co-culturing system in the presence of the OVA323-339 peptide. Similar results were obtained using the CD3/CD28 cell-activation system; the addition of MnTE-2-PyP inhibited Th2 cell proliferation. MnTE-2-PyP suppressed CD25 expression on OVA-specific Th2 cells, which implied that MnTE-2-PyP can inhibit the activation of Th2 cells. MnTE-2-PyP also down-regulated co-stimulatory molecules: CD40, CD80 and CD86 on immature DC. Our studies suggest that the major mechanism by which MnTE-2-PyP inhibits airway inflammation is by acting on the DC and suppressing Th2 cell proliferation and activation.

Original languageEnglish (US)
Pages (from-to)9785-9797
Number of pages13
JournalInternational journal of molecular sciences
Volume13
Issue number8
DOIs
StatePublished - Aug 2012

Keywords

  • Asthma
  • Dendritic cells
  • Inflammation
  • MnTE-2-PyP
  • OVA
  • Th2 cells

ASJC Scopus subject areas

  • Catalysis
  • Molecular Biology
  • Spectroscopy
  • Computer Science Applications
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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