Regulatory T cells (Treg) are a phenotypically heterogeneous group ofcells, playing an important role in regulation of the immune response.To date, several subtypes of regulatory cells have been identified. Themost important of them are: lymphocytes CD4+CD25+, Tr1, Th3 andNK cells. Regulatory T lymphocytes act by secretion of suppressivecytokines (IL-10, TGF-β) or direct cell-to-cell interaction. Functionalabnormalities of regulatory T cells are important in pathogenesis ofmany diseases, especially autoimmune ones. Based on published studies,the review discusses the role of regulatory T cells in pathogenesisof selected bullous skin diseases
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