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Transpl Immunol. 2005 Aug;14(3-4):175-82.

HLA associated genetic predisposition to autoimmune diseases: Genes involved and possible mechanisms.

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  • 1Institute of Immunology, Rikshospitalet University Hospital and University of Oslo, Rikshospitalet, Oslo, Norway.


Autoimmune diseases are the result of an interplay between predisposing genes and triggering environmental factors, leading to loss of self-tolerance and an immune-mediated destruction of autologous cells and/or tissues. Genes in the HLA complex are among the strongest predisposing genetic factors. The HLA complex genes primarily involved are most often those encoding the peptide-presenting HLA class I or II molecules. A probable mechanism is preferential presentation by the disease-associated HLA molecules of peptides from autoantigens to T cells. Recent studies have shown, however, that other genes in the HLA complex also contribute. Taken together, available evidence suggests that the HLA complex harbour both disease predisposing genes which are quite specific for some autoimmune diseases (e.g. HLA-B27 for ankylosing spondylitis) and others which may be more common for several diseases. This will be briefly reviewed in the following.

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