title: IPEX as a result of mutations in FOXP3.
abstract: Immunodysregulation, polyendocrinopathy, enteropathy, X-linked (IPEX) syndrome is a rare disorder caused by mutations in the FOXP3 gene that result in the defective development of CD4+CD25+ regulatory T cells which constitute an important T cell subset involved in immune homeostasis and protection against autoimmunity. Their deficiency is the hallmark of IPEX and leads to severe autoimmune phenomena including autoimmune enteropathy, dermatitis, thyroiditis, and type 1 diabetes, frequently resulting in death within the first 2 years of life. Apart from its clinical implications, IPEX illustrates the importance of immunoregulatory cells such as CD4+CD25+ regulatory T cells.
authors.affiliation: Department of Medical Oncology, Vrije Universiteit Medical Center, De Boelelaan 1117, 1081 HV Amsterdam, The Netherlands. jj.vandervliet@vumc.nl
authors.forename: Hans J J
authors.initials: HJ
authors.lastname: van der Vliet
authors.forename: Edward E
authors.initials: EE
authors.lastname: Nieuwenhuis
mesh_terms: D051858:Forkhead Transcription Factors / Q000235:genetics*; D040181:Genetic Diseases, X-Linked; D006801:Humans; D009154:Mutation; D016884:Polyendocrinopathies, Autoimmune / Q000235:genetics / Q000276:immunology / Q000473:pathology; D050378:T-Lymphocytes, Regulatory / Q000276:immunology*
chemical_list: C418974:FOXP3 protein, human; D051858:Forkhead Transcription Factors