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Defect internalization and tyrosine kinase activation in Aire deficient antigen presenting cells exposed to Candida albicans antigens
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences. (Immunterapigruppen)
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Clinical Bacteriology.
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2006 (English)In: Clinical Immunology, ISSN 1521-6616, E-ISSN 1521-7035, Vol. 121, no 3, 265-273 p.Article in journal (Refereed) Published
Abstract [en]

Patients with Autoimmune polyendocrine syndrome type I (APS I) present with multiple endocrine failures due to organ-specific autoimmune disease, thought to be T-cell-mediated. Paradoxically, APS I patients suffer from chronic mucocutaneous candidiasis. The mutated gene has been identified as the Autoimmune regulator (AIRE). Aire is expressed in medullary epithelial cells of the thymus and in antigen presenting cells in the periphery. T cells from Aire deficient mice and men displayed an enhanced proliferative response against Candida antigen in vitro, suggesting that Aire deficient T cells are competent in recognizing Candida albicans. In contrast, monocytes from APS I patients displayed a decreased and delayed internalization of zymosan. Furthermore, Candida antigen activated monocytes from APS I patients show decreased and altered phoshotyrosine kinase activation. In conclusion, Aire deficient APCs have a defect receptor mediated internalization of Candida which affects kinase activation, likely altering the innate Candida immune response.

Place, publisher, year, edition, pages
2006. Vol. 121, no 3, 265-273 p.
Keyword [en]
human, fungal, presentation/processing, autoimmunity, dendritic cell, APECED
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:uu:diva-104742DOI: 10.1016/j.clim.2006.08.005ISI: 000242484800004PubMedID: 16982213OAI: oai:DiVA.org:uu-104742DiVA: diva2:220099
Available from: 2009-05-29 Created: 2009-05-29 Last updated: 2011-05-06Bibliographically approved

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