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The development of dermatitis infiltrated by gamma delta T cells in IL-7 transgenic mice
Transgenic mice constitutively expressing IL-7 developed severe dermatitis with erythroderma and alopecia. The skin lesions were characterized by massive infiltration of mononuclear cells. Immunofluorescence staining showed that most of the infiltrating cells were T cells with the majority bearing the gamma delta TCR other than the V gamma 5 moiety. Furthermore, the number of gamma delta T cells had increased in the lymphoid organs of the dermatitis animals. These findings indicate the strong relationship between the expression of IL-7 and the development of gamma delta T cells in vivo and the pathological involvement of proliferated and/or activated gamma delta T cells in skin disease.
Transgenic mice constitutively expressing IL-7 developed severe dermatitis with erythroderma and alopecia. The skin lesions were characterized by massive infiltration of mononuclear cells. Immunofluorescence staining showed that most of the infiltrating cells were T cells with the majority bearing the gamma delta TCR other than the V gamma 5 moiety. Furthermore, the number of gamma delta T cells had increased in the lymphoid organs of the dermatitis animals. These findings indicate the strong relationship between the expression of IL-7 and the development of gamma delta T cells in vivo and the pathological involvement of proliferated and/or activated gamma delta T cells in skin disease.