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GATA-3 regulates contact hyperresponsiveness in a murine model of allergic dermatitis


, : GATA-3 regulates contact hyperresponsiveness in a murine model of allergic dermatitis. Immunobiology 217(4): 446-454

Contact hypersensitivity (CHS) is thought to be associated mainly with the activation of T helper (Th) type 1 cells. However, evidence also suggests that Th type 2 cells (Th2) and cytokines play roles in the development of CHS in humans. The present study examines the Th2 response during the development of CHS in response to 2,4,6-trinitrochlorobenzene (TNCB) in GATA-3-transgenic (GATA-3 Tg) mice. GATA-3 Tg mice were immunized with 7% TNCB applied to abdominal shaved skin. Seven days later, the mice were challenged with 1% TNCB applied to the left ear. Ear swelling, cytokine production in the skin of the ear, and the levels of IgE, IgG1 and IgG2a were measured. Furthermore, we examined the effects of medical treatment on TNCB-induced contact dermatitis using this model. The ear-swelling responses of TNCB-sensitized/challenged GATA-3 Tg mice were significantly greater than those of similarly treated wild-type (WT) mice. The expression of both IL-5 and IL-13 in TNCB sensitized/challenged skin tissues and the IgE response after challenge were obviously increased in the GATA-3 Tg mice, whereas the expression of IFN-γ was identical in the challenged skin tissues of GATA-3-Tg and WT mice. When TNCB-sensitized GATA-3 Tg mice were treated with a high dose of tacrolimus, ear swelling was not significantly decreased, compared with the results in WT mice. These results suggest that GATA-3-induced Th2-dominant responses play a critical role in the pathogenesis of allergic types of dermatitis, such as atopic dermatitis, and may lead to useful new drug development in the future.

US$19.90

PMID: 22112437

DOI: 10.1016/j.imbio.2011.10.009


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