PMID- 27263022 OWN - NLM STAT- MEDLINE DCOM- 20191211 LR - 20220801 IS - 1559-0267 (Electronic) IS - 1080-0549 (Linking) VI - 57 IP - 1 DP - 2019 Aug TI - Transglutaminase 2 and Transglutaminase 2 Autoantibodies in Celiac Disease: a Review. PG - 23-38 LID - 10.1007/s12016-016-8557-4 [doi] AB - Celiac disease is a common inflammatory disorder with a prevalence of 1-2 % in which a distinct dietary wheat, rye, and barley component, gluten, induces small-bowel mucosal villous atrophy, crypt hyperplasia, and inflammation. The small-bowel mucosal damage can be reversed by a strict lifelong gluten-free diet, which is currently the only effective treatment for the condition. A key player in the pathogenetic process leading to the enteropathy is played by a protein called transglutaminase 2 (TG2), which is able to enzymatically modify gluten-derived gliadin peptides. The TG2-catalyzed deamidation of the gliadin peptides results in their increased binding affinity to the disease-predisposing human leukocyte antigen (HLA) DQ2 and DQ8 molecules, thus enabling a strong immune response to be launched. Blocking the enzymatic activity of TG2 has thus been suggested as a suitable novel pharmacological approach to treat celiac disease. By virtue of its transamidation capacity, TG2 is also able to cross-link gliadin peptides to itself, this resulting in the generation of TG2-gliadin peptide complexes whose presence might provide an explanation for the generation of the TG2 autoantibodies characteristic of celiac disease. Due to their excellent specificity for the disorder, the TG2-targeted autoantibodies are widely used in the diagnostics as a first-line test to select patients for gastrointestinal endoscopy. More recently, it has come to be appreciated that these autoantibodies and also the TG2-specific B cells might play an active role in the disease pathogenesis. In this review, we assess the role of TG2, TG2-specific B cells, and autoantibodies in celiac disease. FAU - Rauhavirta, Tiina AU - Rauhavirta T AD - Pediatric Research Center, University of Tampere and Tampere University Hospital, Finn Medi 3, 33520, Tampere, Finland. FAU - Hietikko, Minna AU - Hietikko M AD - Pediatric Research Center, University of Tampere and Tampere University Hospital, Finn Medi 3, 33520, Tampere, Finland. FAU - Salmi, Teea AU - Salmi T AD - School of Medicine, University of Tampere, Tampere, Finland. AD - Department of Dermatology, Tampere University Hospital, Tampere, Finland. FAU - Lindfors, Katri AU - Lindfors K AD - Pediatric Research Center, University of Tampere and Tampere University Hospital, Finn Medi 3, 33520, Tampere, Finland. katri.lindfors@uta.fi. LA - eng GR - 9T058/Competitive State Research Financing of the Expert Responsibility Areas of Tampere University Hospital/ PT - Journal Article PT - Review PL - United States TA - Clin Rev Allergy Immunol JT - Clinical reviews in allergy & immunology JID - 9504368 RN - 0 (Autoantibodies) RN - 0 (HLA-DQ Antigens) RN - 0 (HLA-DQ2 antigen) RN - 0 (HLA-DQ8 antigen) RN - 9007-90-3 (Gliadin) RN - EC 2.3.2.13 (Protein Glutamine gamma Glutamyltransferase 2) RN - EC 2.3.2.13 (Transglutaminases) RN - EC 3.6.1.- (GTP-Binding Proteins) SB - IM MH - Adult MH - Animals MH - Autoantibodies/*immunology MH - Autoimmune Diseases MH - B-Lymphocytes/immunology MH - Celiac Disease/diagnosis/*epidemiology/*immunology MH - Child MH - Diet, Gluten-Free MH - Female MH - GTP-Binding Proteins/*immunology/metabolism MH - Gliadin/metabolism MH - HLA-DQ Antigens/metabolism MH - Humans MH - Male MH - Mice MH - Middle Aged MH - Prevalence MH - Protein Glutamine gamma Glutamyltransferase 2 MH - Risk Factors MH - Transglutaminases/*immunology/metabolism OTO - NOTNLM OT - Celiac disease OT - Transglutaminase 2 OT - Transglutaminase 2 autoantibodies EDAT- 2016/06/06 06:00 MHDA- 2019/12/18 06:00 CRDT- 2016/06/06 06:00 PHST- 2016/06/06 06:00 [pubmed] PHST- 2019/12/18 06:00 [medline] PHST- 2016/06/06 06:00 [entrez] AID - 10.1007/s12016-016-8557-4 [pii] AID - 10.1007/s12016-016-8557-4 [doi] PST - ppublish SO - Clin Rev Allergy Immunol. 2019 Aug;57(1):23-38. doi: 10.1007/s12016-016-8557-4.