PMID- 29458095 OWN - NLM STAT- MEDLINE DCOM- 20190916 LR - 20190916 IS - 1943-7811 (Electronic) IS - 1525-1578 (Linking) VI - 20 IP - 3 DP - 2018 May TI - Rapid, Loop-Mediated Isothermal Amplification Detection of Celiac Disease Risk Alleles. PG - 307-315 LID - S1525-1578(17)30544-5 [pii] LID - 10.1016/j.jmoldx.2018.01.005 [doi] AB - Human leukocyte antigen (HLA) genotyping has become a useful investigation in the diagnostic work-up of celiac disease (CD), with utility in risk stratification and screening. However, broad application of this technology has been hindered by the cost and time burden of conventional laboratory-based assays. We have developed and validated CD-loop-mediated isothermal amplification (CD-LAMP), a LAMP assay, which enables rapid identification of the signature CD risk genotypes, HLA-DQ2.5, HLA-DQ8, HLA-DQ2.2, and HLA-DQA1*05. Sample-to-answer is achieved in approximately 65 minutes without DNA purification, thermal cycling, or specialized analytical equipment. CD-LAMP genotyping of samples was 100% concordant with accredited pathology genotyping on a panel of 40 blood and 20 saliva samples. In a panel of 100 purified DNA samples, genotyping of the high-risk DQ2.5 genotype was 100% concordant with accredited pathology genotyping, with slightly reduced sensitivity for the DQ8 genotype (97.1%) and reduced specificity for the DQ8 (93.9%) and DQ2.2 (95.1%) genotypes. CD-LAMP results are easily visualized and instrument free through the addition of a DNA intercalating dye after amplification. Combined with point-of-care antibody testing, CD-LAMP may enable immediate, confident CD diagnosis at a low cost in the clinical setting. CI - Copyright (c) 2018 American Society for Investigative Pathology and the Association for Molecular Pathology. Published by Elsevier Inc. All rights reserved. FAU - Erlichster, Michael AU - Erlichster M AD - Centre for Neural Engineering, University of Melbourne, Melbourne, Victoria, Australia; Department of Medicine, University of Melbourne, Melbourne, Victoria, Australia. FAU - Tye-Din, Jason A AU - Tye-Din JA AD - Immunology Division, The Walter and Eliza Hall Institute of Medical Research, Melbourne, Victoria, Australia; Department of Medical Biology, University of Melbourne, Melbourne, Victoria, Australia; Murdoch Children's Research Institute, Melbourne, Victoria, Australia; Department of Gastroenterology, The Royal Melbourne Hospital, Melbourne, Victoria, Australia. FAU - Varney, Michael D AU - Varney MD AD - Victorian Transplantation and Immunogenetics Service, Australian Red Cross Blood Service, Melbourne, Victoria, Australia. FAU - Skafidas, Efstratios AU - Skafidas E AD - Centre for Neural Engineering, University of Melbourne, Melbourne, Victoria, Australia; Department of Electrical and Electronic Engineering, University of Melbourne, Melbourne, Victoria, Australia; The Florey Institute of Neuroscience and Mental Health, Melbourne, Victoria, Australia. FAU - Kwan, Patrick AU - Kwan P AD - Department of Medicine, University of Melbourne, Melbourne, Victoria, Australia; Department of Electrical and Electronic Engineering, University of Melbourne, Melbourne, Victoria, Australia; Department of Neurology, The Royal Melbourne Hospital, Melbourne, Victoria, Australia. Electronic address: patrick.kwan@unimelb.edu.au. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20180217 PL - United States TA - J Mol Diagn JT - The Journal of molecular diagnostics : JMD JID - 100893612 RN - 9007-49-2 (DNA) SB - IM MH - *Alleles MH - Base Sequence MH - Celiac Disease/*genetics MH - DNA/genetics MH - *Genetic Predisposition to Disease MH - Humans MH - Nucleic Acid Amplification Techniques/*methods MH - Reproducibility of Results MH - Risk Factors MH - Sensitivity and Specificity EDAT- 2018/02/20 06:00 MHDA- 2019/09/17 06:00 CRDT- 2018/02/20 06:00 PHST- 2017/11/12 00:00 [received] PHST- 2017/12/20 00:00 [revised] PHST- 2018/01/19 00:00 [accepted] PHST- 2018/02/20 06:00 [pubmed] PHST- 2019/09/17 06:00 [medline] PHST- 2018/02/20 06:00 [entrez] AID - S1525-1578(17)30544-5 [pii] AID - 10.1016/j.jmoldx.2018.01.005 [doi] PST - ppublish SO - J Mol Diagn. 2018 May;20(3):307-315. doi: 10.1016/j.jmoldx.2018.01.005. Epub 2018 Feb 17.