PMID- 34299114 OWN - NLM STAT- MEDLINE DCOM- 20210730 LR - 20210730 IS - 1422-0067 (Electronic) IS - 1422-0067 (Linking) VI - 22 IP - 14 DP - 2021 Jul 13 TI - The Multifactorial Progression from the Islet Autoimmunity to Type 1 Diabetes in Children. LID - 10.3390/ijms22147493 [doi] LID - 7493 AB - Type 1 Diabetes (T1D) results from autoimmune destruction of insulin producing pancreatic ss-cells. This disease, with a peak incidence in childhood, causes the lifelong need for insulin injections and necessitates careful monitoring of blood glucose levels. However, despite the current insulin therapies, it still shortens life expectancy due to complications affecting multiple organs. Recently, the incidence of T1D in childhood has increased by 3-5% per year in most developed Western countries. The heterogeneity of the disease process is supported by the findings of follow-up studies started early in infancy. The development of T1D is usually preceded by the appearance of autoantibodies targeted against antigens expressed in the pancreatic islets. The risk of T1D increases significantly with an increasing number of positive autoantibodies. The order of autoantibody appearance affects the disease risk. Genetic susceptibility, mainly defined by the human leukocyte antigen (HLA) class II gene region and environmental factors, is important in the development of islet autoimmunity and T1D. Environmental factors, mainly those linked to the changes in the gut microbiome as well as several pathogens, especially viruses, and diet are key modulators of T1D. The aim of this paper is to expand the understanding of the aetiology and pathogenesis of T1D in childhood by detailed description and comparison of factors affecting the progression from the islet autoimmunity to T1D in children. FAU - Bauer, Witold AU - Bauer W AUID- ORCID: 0000-0003-0776-6714 AD - Clinical Research Centre, Medical University of Bialystok, Marii Sklodowskiej-Curie 24a, 15-276 Bialystok, Poland. FAU - Gyenesei, Attila AU - Gyenesei A AD - Clinical Research Centre, Medical University of Bialystok, Marii Sklodowskiej-Curie 24a, 15-276 Bialystok, Poland. AD - Szentagothai Research Centre, University of Pecs, Ifjusag utja 20, 7624 Pecs, Hungary. FAU - Kretowski, Adam AU - Kretowski A AUID- ORCID: 0000-0002-4522-4978 AD - Clinical Research Centre, Medical University of Bialystok, Marii Sklodowskiej-Curie 24a, 15-276 Bialystok, Poland. AD - Department of Endocrinology, Diabetology and Internal Medicine, Medical University of Bialystok, Marii Sklodowskiej-Curie 24a, 15-276 Bialystok, Poland. LA - eng PT - Journal Article PT - Review DEP - 20210713 PL - Switzerland TA - Int J Mol Sci JT - International journal of molecular sciences JID - 101092791 RN - 0 (Autoantibodies) SB - IM MH - Autoantibodies/*immunology MH - *Autoimmunity MH - Child MH - Diabetes Mellitus, Type 1/etiology/metabolism/*pathology MH - *Gastrointestinal Microbiome MH - *Genetic Predisposition to Disease MH - Humans MH - Islets of Langerhans/immunology/metabolism/*pathology MH - Risk Factors PMC - PMC8305179 OTO - NOTNLM OT - HLA OT - T1D prediction OT - gut microbiome OT - islet autoantibodies OT - type 1 diabetes COIS- The authors declare no conflict of interest. EDAT- 2021/07/25 06:00 MHDA- 2021/07/31 06:00 PMCR- 2021/07/13 CRDT- 2021/07/24 01:02 PHST- 2021/06/16 00:00 [received] PHST- 2021/07/04 00:00 [revised] PHST- 2021/07/09 00:00 [accepted] PHST- 2021/07/24 01:02 [entrez] PHST- 2021/07/25 06:00 [pubmed] PHST- 2021/07/31 06:00 [medline] PHST- 2021/07/13 00:00 [pmc-release] AID - ijms22147493 [pii] AID - ijms-22-07493 [pii] AID - 10.3390/ijms22147493 [doi] PST - epublish SO - Int J Mol Sci. 2021 Jul 13;22(14):7493. doi: 10.3390/ijms22147493.