Immune regulatory T cells in siblings of children suffering from type 1 diabetes mellitus
2006 (English)In: Scandinavian Journal of Immunology, ISSN 0300-9475, Vol. 64, no 5, 531-535 p.Article in journal (Refereed) Published
Patients with type 1 diabetes are suffering from defects in immune regulatory cells. Their siblings may be at increased risk of type 1 diabetes especially if they are carriers of certain human leucocyte antigen (HLA) alleles. In a prospective non-randomized study, we intended to evaluate 31 healthy siblings of paediatric patients with type 1 diabetes and explore immune regulatory populations of CD4+CD25+ T cells and natural killer (NK) T cells. Tested siblings of type 1 diabetes patients were stratified according to the HLA-associated risk of possible diabetes development. Immune regulatory function of CD4+CD25+ T cells was tested in vitro. Significant differences in CD4+CD25+ but not in NK T cells have been identified. Siblings of type 1 diabetes patients carrying high risk HLA alleles (DQA1*05, DQB1*0201, DQB1*0302) had significantly lower number of immune regulatory CD4+CD25+ T cells than the age-matched healthy controls or siblings carrying low-risk HLA alleles (DQB1*0301, DQB1*0603, DQB1*0602). Regulatory function of CD4+CD25+ T cells demonstrated a dose-escalation effect. In siblings of type 1 diabetes patients, the defect in immune regulatory CD4+CD25+ T cells exists in association with genetic HLA-linked risk for type 1 diabetes. © 2006 The Authors.
Place, publisher, year, edition, pages
2006. Vol. 64, no 5, 531-535 p.
National CategoryMedical and Health Sciences
IdentifiersURN: urn:nbn:se:liu:diva-36060DOI: 10.1111/j.1365-3083.2006.01837.xLocal ID: 29632OAI: oai:DiVA.org:liu-36060DiVA: diva2:256908