Total glucosides of paeony inhibit the inflammatory responses of mice with allergic contact dermatitis by restoring the balanced secretion of pro-/anti-inflammatory cytokines

Chun Wang, Jun Yuan, Hua Xun Wu, Yan Chang, Qingtong Wang, Yu Jing Wu, Peng Zhou, Xiao Dan Yang, Jun Yu, Wei Wei

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

The present study aimed to investigate the regulation exerted by the total glucosides of paeony (TGP) on the production of interleukin-2 (IL-2), IL-4, IL-10 and IL-17 in the serum and lymphocytes of mice with allergic contact dermatitis (ACD). ACD in mice was induced by the repeated application of 2,4-dinitrochlorobenzene (DNCB) to their skins. The mice were orally administered TGP (35, 70, and 140 mg/kg/d) and prednisone (Pre, 5 mg/kg/d) from day 1 to day 7 after immunization. The inflammatory responses were evaluated by ear swelling and histological examination. Thymocyte proliferation was assayed by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H tetrazolium bromide assay. The cytokine production in the serum and lymphocytes supernatant was measured by enzyme-linked immunosorbent assay. The results indicated that the topical application of DNCB to the skin provoked obvious inflammatory responses. The oral administration of TGP (70 and 140 mg/kg/d) and Pre (5 mg/kg/d) significantly inhibited skin inflammation, decreased the thymus and spleen indices, and inhibited thymocyte proliferation in mice treated with DNCB. Further study indicated that TGP increased IL-4 and IL-10 production but decreased the production of IL-2 and IL-17 in the serum and lymphocyte supernatant. The correlation analysis suggested significantly positive correlations between IL-2 and IL-17 production and the severity of skin inflammation, whereas negative correlations were obtained for IL-4 and IL-10 production and skin inflammation. In summary, these results suggest that the therapeutic effects of TGP on ACD may result from its regulation of the imbalanced secretion of IL-2/IL-4 and IL-10/IL-17.

Original languageEnglish (US)
Pages (from-to)325-334
Number of pages10
JournalInternational Immunopharmacology
Volume24
Issue number2
DOIs
StatePublished - Jan 1 2015
Externally publishedYes

Keywords

  • Allergic contact dermatitis
  • Interleukin-10
  • Interleukin-17
  • Interleukin-2
  • Interleukin-4
  • Total glucosides of paeony

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology
  • Pharmacology

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