Melanocyte-specific CD8+ T cells are associated with epidermal depigmentation in a novel mouse model of vitiligo
Autor: | J. S. Byun, Youngran Cho, Sooseong You, Eui-Cheol Shin |
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Rok vydání: | 2013 |
Předmět: |
Male
Immunology Vitiligo CD8-Positive T-Lymphocytes Melanocyte Biology Mice Depigmentation Antigen Dermis medicine Animals Humans Immunology and Allergy Cytotoxic T cell integumentary system Vaccination Degranulation Membrane Proteins Original Articles medicine.disease Peptide Fragments Mice Inbred C57BL Disease Models Animal medicine.anatomical_structure Melanocytes Epidermis medicine.symptom Pigmentation Disorders CD8 |
Zdroj: | Clinical and Experimental Immunology. 174:38-44 |
ISSN: | 1365-2249 0009-9104 |
Popis: | Summary In the present study, we established a novel murine model of vitiligo by sequential prime/boost immunizations into the hind footpad and tail dermis with tyrosinase-related protein 2 (TRP2)-180 (SVYDFFVWL) peptide, lipopolysaccharides and cytosine–phosphate–guanosine (CpG) oligodeoxynucleotides. Immunized mice developed epidermal depigmentation in the tail skin without hair depigmentation, thereby differentiating this approach from established models of vitiligo. Following intradermal tail immunization, activated CD8+ interferon (IFN)-γ+ T cells were recruited locally to the tail skin. In-vivo cytotoxicity assays demonstrated specific lysis of TRP2-180-presenting cells in immunized mice. Furthermore, the extent of skin depigmentation correlated with the frequency of TRP2-180-specific splenic CD8+ T cells, as determined by IFN-γ and tumour necrosis factor (TNF)-α production, and cytotoxic degranulation evidenced by CD107a staining. These findings suggest a correlation between the presence of TRP2-180-specific CD8+ effector T cells and the development of depigmented skin lesions in our vitiligo model. This new model of vitiligo, characterized by skin depigmentation without hair depigmentation, is more similar to human disease than previous murine models. Therefore, this model is well suited to future studies on the pathogenesis of vitiligo and the development of novel therapeutics for vitiligo. |
Databáze: | OpenAIRE |
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