Effect of protease-activated receptor-2 deficiency on allergic dermatitis in the mouse ear

T. Takizawa, Y. Wada, J. Matsumoto, M. Tamiya, A.J.H. Smith, R.J. Plevin, T. Kanke, Y. Saino

Research output: Contribution to journalArticle

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Abstract

To investigate the involvement of protease-activated receptor-2 (PAR-2) in allergic dermatitis, we generated PAR-2-deficient (PAR-2−/−) mice. Ear thickness, contact hypersensitivity (CH) induced by topical application of picryl chloride (PC) or oxazolone (Ox) after sensitization, and vascular permeability after ear passive cutaneous anaphylaxis (PCA) were compared between wild-type (WT) and PAR-2−/− mice. Ear thickness was almost the same in untreated WT and PAR-2−/− mice. Topical application of PC or Ox thickened the ears at 6, 24 and 48 h after challenge with a peak at 24 h in WT mice. In PAR-2−/− mice, the ear swelling induced by both PC and Ox was suppressed at every time point, and significant inhibition was found at 24 h in PC-induced CH and at 24 and 48 h in Ox-induced CH. Histopathological observation of the ears at 24 h after challenge revealed that PC- or Ox-induced ear edema and infiltration of inflammatory cells in WT mice were greatly attenuated in PAR-2−/− mice. The vascular permeability in the ears after PCA was not different between WT and PAR-2−/− mice. These results strongly suggest that PAR-2 plays a crucial role in type IV allergic dermatitis but not in type I allergic dermatitis.
LanguageEnglish
Pages77-84
Number of pages7
JournalJapanese Journal of Pharmacology
Volume88
Issue number1
DOIs
Publication statusPublished - 2002

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PAR-2 Receptor
Dermatitis
Ear
Picryl Chloride
Oxazolone
Contact Dermatitis
Passive Cutaneous Anaphylaxis
Capillary Permeability
Edema
Observation

Keywords

  • protease-activated receptor-2
  • knockout mice
  • Allergic dermatitis
  • contact hypersensitivity
  • passive cutaneous anaphylaxis

Cite this

Takizawa, T. ; Wada, Y. ; Matsumoto, J. ; Tamiya, M. ; Smith, A.J.H. ; Plevin, R.J. ; Kanke, T. ; Saino, Y. / Effect of protease-activated receptor-2 deficiency on allergic dermatitis in the mouse ear. In: Japanese Journal of Pharmacology. 2002 ; Vol. 88, No. 1. pp. 77-84.
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Takizawa, T, Wada, Y, Matsumoto, J, Tamiya, M, Smith, AJH, Plevin, RJ, Kanke, T & Saino, Y 2002, 'Effect of protease-activated receptor-2 deficiency on allergic dermatitis in the mouse ear' Japanese Journal of Pharmacology, vol. 88, no. 1, pp. 77-84. https://doi.org/10.1254/jjp.88.77

Effect of protease-activated receptor-2 deficiency on allergic dermatitis in the mouse ear. / Takizawa, T.; Wada, Y.; Matsumoto, J.; Tamiya, M.; Smith, A.J.H.; Plevin, R.J.; Kanke, T.; Saino, Y.

In: Japanese Journal of Pharmacology, Vol. 88, No. 1, 2002, p. 77-84.

Research output: Contribution to journalArticle

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T1 - Effect of protease-activated receptor-2 deficiency on allergic dermatitis in the mouse ear

AU - Takizawa, T.

AU - Wada, Y.

AU - Matsumoto, J.

AU - Tamiya, M.

AU - Smith, A.J.H.

AU - Plevin, R.J.

AU - Kanke, T.

AU - Saino, Y.

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N2 - To investigate the involvement of protease-activated receptor-2 (PAR-2) in allergic dermatitis, we generated PAR-2-deficient (PAR-2−/−) mice. Ear thickness, contact hypersensitivity (CH) induced by topical application of picryl chloride (PC) or oxazolone (Ox) after sensitization, and vascular permeability after ear passive cutaneous anaphylaxis (PCA) were compared between wild-type (WT) and PAR-2−/− mice. Ear thickness was almost the same in untreated WT and PAR-2−/− mice. Topical application of PC or Ox thickened the ears at 6, 24 and 48 h after challenge with a peak at 24 h in WT mice. In PAR-2−/− mice, the ear swelling induced by both PC and Ox was suppressed at every time point, and significant inhibition was found at 24 h in PC-induced CH and at 24 and 48 h in Ox-induced CH. Histopathological observation of the ears at 24 h after challenge revealed that PC- or Ox-induced ear edema and infiltration of inflammatory cells in WT mice were greatly attenuated in PAR-2−/− mice. The vascular permeability in the ears after PCA was not different between WT and PAR-2−/− mice. These results strongly suggest that PAR-2 plays a crucial role in type IV allergic dermatitis but not in type I allergic dermatitis.

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KW - knockout mice

KW - Allergic dermatitis

KW - contact hypersensitivity

KW - passive cutaneous anaphylaxis

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