PMID- 27411439 OWN - NLM STAT- MEDLINE DCOM- 20170328 LR - 20220321 IS - 1399-5448 (Electronic) IS - 1399-543X (Print) IS - 1399-543X (Linking) VI - 17 Suppl 22 IP - Suppl 22 DP - 2016 Jul TI - Environmental factors in the etiology of type 1 diabetes, celiac disease, and narcolepsy. PG - 65-72 LID - 10.1111/pedi.12390 [doi] AB - The etiology of human leukocyte antigen (HLA)-associated organ-specific autoimmune diseases is incomplete. In type 1 diabetes and celiac disease, the strongest associations are with the HLA-DR3-DQ2 and DR4-DQ8 haplotypes, whereas the DQB1*06:02 allele has a strong negative association. In contrast, narcolepsy, especially as recently triggered by the Pandemrix((R)) H1N1 vaccine (GlaxoKlineSmith (GSK), Brentford, Middlesex, UK), did not seem to develop without at least one copy of the latter allele. The overall hypothesis is that the role of these different HLA haplotypes, especially in Finland and Sweden, is related to the immune response to infectious agents that are common in these two populations. The high incidence of both type 1 diabetes and celiac disease in Scandinavia may be the result of the HLA-DR3-DQ2 and DR4-DQ8 haplotypes, and the DQB1*06:02 allele are common because they protected people from succumbing to common infections. The timing of dissecting the autoimmune response is critical to understand the possible role of environmental factors. First, an etiological trigger may be a common virus infecting beta cells or with antigens inducing beta-cell cross reactivity. Second, an autoimmune reaction may ensue, perhaps in response to beta-cell apoptosis or autophagy, resulting in autoantigen-specific T cells and autoantibodies. It is critical in at-risk children to dissect the immune response prior to the appearance of autoantibodies in order to identify cellular reactions in response to environmental factors that are able to induce an HLA-associated immune reaction. CI - (c) 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd. FAU - Lernmark, Ake AU - Lernmark A AD - Department of Clinical Sciences, Lund University, Malmo, Sweden. LA - eng GR - U01 DK063861/DK/NIDDK NIH HHS/United States GR - UC4 DK063821/DK/NIDDK NIH HHS/United States GR - UC4 DK063861/DK/NIDDK NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't PT - Review PL - Denmark TA - Pediatr Diabetes JT - Pediatric diabetes JID - 100939345 RN - 0 (Influenza Vaccines) RN - 0 (pandemrix) SB - IM MH - Autoimmunity MH - Celiac Disease/*etiology MH - Diabetes Mellitus, Type 1/*etiology MH - Genes, MHC Class II MH - Humans MH - Influenza Vaccines/adverse effects MH - Narcolepsy/*etiology PMC - PMC5473290 MID - NIHMS772776 OTO - NOTNLM OT - GAD65 OT - HLA OT - IA-2 OT - ZnT8 transporter OT - autoantigen OT - immune reaction OT - insulin OT - narcolepsy OT - tissue transglutaminase EDAT- 2016/07/15 06:00 MHDA- 2017/03/30 06:00 PMCR- 2017/07/01 CRDT- 2016/07/15 06:00 PHST- 2016/02/16 00:00 [received] PHST- 2016/02/25 00:00 [revised] PHST- 2016/03/23 00:00 [accepted] PHST- 2017/07/01 00:00 [pmc-release] PHST- 2016/07/15 06:00 [entrez] PHST- 2016/07/15 06:00 [pubmed] PHST- 2017/03/30 06:00 [medline] AID - 10.1111/pedi.12390 [doi] PST - ppublish SO - Pediatr Diabetes. 2016 Jul;17 Suppl 22(Suppl 22):65-72. doi: 10.1111/pedi.12390.