PMID- 36834511 OWN - NLM STAT- MEDLINE DCOM- 20230228 LR - 20230301 IS - 1422-0067 (Electronic) IS - 1422-0067 (Linking) VI - 24 IP - 4 DP - 2023 Feb 4 TI - Contribution of Retrotransposons to the Pathogenesis of Type 1 Diabetes and Challenges in Analysis Methods. LID - 10.3390/ijms24043104 [doi] LID - 3104 AB - Type 1 diabetes (T1D) is one of the most common chronic diseases of the endocrine system, associated with several life-threatening comorbidities. While the etiopathogenesis of T1D remains elusive, a combination of genetic susceptibility and environmental factors, such as microbial infections, are thought to be involved in the development of the disease. The prime model for studying the genetic component of T1D predisposition encompasses polymorphisms within the HLA (human leukocyte antigen) region responsible for the specificity of antigen presentation to lymphocytes. Apart from polymorphisms, genomic reorganization caused by repeat elements and endogenous viral elements (EVEs) might be involved in T1D predisposition. Such elements are human endogenous retroviruses (HERVs) and non-long terminal repeat (non-LTR) retrotransposons, including long and short interspersed nuclear elements (LINEs and SINEs). In line with their parasitic origin and selfish behaviour, retrotransposon-imposed gene regulation is a major source of genetic variation and instability in the human genome, and may represent the missing link between genetic susceptibility and environmental factors long thought to contribute to T1D onset. Autoreactive immune cell subtypes with differentially expressed retrotransposons can be identified with single-cell transcriptomics, and personalized assembled genomes can be constructed, which can then serve as a reference for predicting retrotransposon integration/restriction sites. Here we review what is known to date about retrotransposons, we discuss the involvement of viruses and retrotransposons in T1D predisposition, and finally we consider challenges in retrotransposons analysis methods. FAU - Stangar, Anja AU - Stangar A AD - Division of Pediatrics, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia. AD - Department of Pediatrics, Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia. FAU - Kovac, Jernej AU - Kovac J AUID- ORCID: 0000-0003-3080-4838 AD - Division of Pediatrics, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia. AD - Department of Pediatrics, Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia. FAU - Sket, Robert AU - Sket R AD - Division of Pediatrics, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia. FAU - Tesovnik, Tine AU - Tesovnik T AD - Division of Pediatrics, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia. FAU - Zajec, Ana AU - Zajec A AD - Division of Pediatrics, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia. AD - Department of Pediatrics, Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia. FAU - Cugalj Kern, Barbara AU - Cugalj Kern B AD - Division of Pediatrics, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia. AD - Department of Pediatrics, Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia. FAU - Jenko Bizjan, Barbara AU - Jenko Bizjan B AD - Division of Pediatrics, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia. AD - Department of Pediatrics, Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia. FAU - Battelino, Tadej AU - Battelino T AUID- ORCID: 0000-0002-0273-4732 AD - Division of Pediatrics, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia. AD - Department of Pediatrics, Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia. FAU - Dovc, Klemen AU - Dovc K AUID- ORCID: 0000-0001-9201-2145 AD - Division of Pediatrics, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia. AD - Department of Pediatrics, Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia. LA - eng GR - P3-0343/Slovenian Research Agency/ PT - Journal Article PT - Review DEP - 20230204 PL - Switzerland TA - Int J Mol Sci JT - International journal of molecular sciences JID - 101092791 RN - 0 (Retroelements) SB - IM MH - Humans MH - Retroelements MH - *Diabetes Mellitus, Type 1/genetics MH - Genetic Predisposition to Disease MH - *Endogenous Retroviruses MH - Short Interspersed Nucleotide Elements PMC - PMC9966460 OTO - NOTNLM OT - retrotransposons OT - retrotransposons analysis methods OT - single-cell sequencing OT - type 1 diabetes OT - type 1 diabetes pathogenesis OT - viral infections COIS- The authors declare no conflict of interest. EDAT- 2023/02/26 06:00 MHDA- 2023/03/03 06:00 PMCR- 2023/02/04 CRDT- 2023/02/25 02:37 PHST- 2022/11/30 00:00 [received] PHST- 2023/01/30 00:00 [revised] PHST- 2023/02/02 00:00 [accepted] PHST- 2023/02/25 02:37 [entrez] PHST- 2023/02/26 06:00 [pubmed] PHST- 2023/03/03 06:00 [medline] PHST- 2023/02/04 00:00 [pmc-release] AID - ijms24043104 [pii] AID - ijms-24-03104 [pii] AID - 10.3390/ijms24043104 [doi] PST - epublish SO - Int J Mol Sci. 2023 Feb 4;24(4):3104. doi: 10.3390/ijms24043104.