PMID- 23791106 OWN - NLM STAT- MEDLINE DCOM- 20130916 LR - 20211021 IS - 1537-6605 (Electronic) IS - 0002-9297 (Print) IS - 0002-9297 (Linking) VI - 93 IP - 1 DP - 2013 Jul 11 TI - Coding variants at hexa-allelic amino acid 13 of HLA-DRB1 explain independent SNP associations with follicular lymphoma risk. PG - 167-72 LID - S0002-9297(13)00233-4 [pii] LID - 10.1016/j.ajhg.2013.05.020 [doi] AB - Non-Hodgkin lymphoma represents a diverse group of blood malignancies, of which follicular lymphoma (FL) is a common subtype. Previous genome-wide association studies (GWASs) have identified in the human leukocyte antigen (HLA) class II region multiple independent SNPs that are significantly associated with FL risk. To dissect these signals and determine whether coding variants in HLA genes are responsible for the associations, we conducted imputation, HLA typing, and sequencing in three independent populations for a total of 689 cases and 2,446 controls. We identified a hexa-allelic amino acid polymorphism at position 13 of the HLA-DR beta chain that showed the strongest association with FL within the major histocompatibility complex (MHC) region (multiallelic p = 2.3 x 10(-)(1)(5)). Out of six possible amino acids that occurred at that position within the population, we classified two as high risk (Tyr and Phe), two as low risk (Ser and Arg), and two as moderate risk (His and Gly). There was a 4.2-fold difference in risk (95% confidence interval = 2.9-6.1) between subjects carrying two alleles encoding high-risk amino acids and those carrying two alleles encoding low-risk amino acids (p = 1.01 x 10(-)(1)(4)). This coding variant might explain the complex SNP associations identified by GWASs and suggests a common HLA-DR antigen-driven mechanism for the pathogenesis of FL and rheumatoid arthritis. CI - Copyright (c) 2013 The American Society of Human Genetics. Published by Elsevier Inc. All rights reserved. FAU - Foo, Jia Nee AU - Foo JN AD - Human Genetics, Genome Institute of Singapore, Agency for Science, Technology, and Research, Singapore 138672, Singapore. FAU - Smedby, Karin E AU - Smedby KE FAU - Akers, Nicholas K AU - Akers NK FAU - Berglund, Mattias AU - Berglund M FAU - Irwan, Ishak D AU - Irwan ID FAU - Jia, Xiaoming AU - Jia X FAU - Li, Yi AU - Li Y FAU - Conde, Lucia AU - Conde L FAU - Darabi, Hatef AU - Darabi H FAU - Bracci, Paige M AU - Bracci PM FAU - Melbye, Mads AU - Melbye M FAU - Adami, Hans-Olov AU - Adami HO FAU - Glimelius, Bengt AU - Glimelius B FAU - Khor, Chiea Chuen AU - Khor CC FAU - Hjalgrim, Henrik AU - Hjalgrim H FAU - Padyukov, Leonid AU - Padyukov L FAU - Humphreys, Keith AU - Humphreys K FAU - Enblad, Gunilla AU - Enblad G FAU - Skibola, Christine F AU - Skibola CF FAU - de Bakker, Paul I W AU - de Bakker PI FAU - Liu, Jianjun AU - Liu J LA - eng GR - CA89745/CA/NCI NIH HHS/United States GR - CA122663/CA/NCI NIH HHS/United States GR - CA104682/CA/NCI NIH HHS/United States GR - R01 CA154643/CA/NCI NIH HHS/United States GR - R01 CA104682/CA/NCI NIH HHS/United States GR - R01 CA045614/CA/NCI NIH HHS/United States GR - R03 CA089745/CA/NCI NIH HHS/United States GR - CA069269-01/CA/NCI NIH HHS/United States GR - R01 CA122663/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20130620 PL - United States TA - Am J Hum Genet JT - American journal of human genetics JID - 0370475 RN - 0 (Amino Acids) RN - 0 (HLA-DRB1 Chains) SB - IM MH - *Alleles MH - Amino Acids/genetics/*metabolism MH - Case-Control Studies MH - Confidence Intervals MH - Gene Frequency MH - Genetic Association Studies MH - Genetic Predisposition to Disease MH - Genetics, Population/methods MH - HLA-DRB1 Chains/*genetics/metabolism MH - Haplotypes MH - Histocompatibility Testing MH - Humans MH - Lymphoma, Follicular/*genetics/metabolism MH - Open Reading Frames MH - *Polymorphism, Single Nucleotide MH - Risk Factors PMC - PMC3710749 EDAT- 2013/06/25 06:00 MHDA- 2013/09/17 06:00 PMCR- 2014/01/11 CRDT- 2013/06/25 06:00 PHST- 2013/04/08 00:00 [received] PHST- 2013/05/21 00:00 [revised] PHST- 2013/05/23 00:00 [accepted] PHST- 2013/06/25 06:00 [entrez] PHST- 2013/06/25 06:00 [pubmed] PHST- 2013/09/17 06:00 [medline] PHST- 2014/01/11 00:00 [pmc-release] AID - S0002-9297(13)00233-4 [pii] AID - AJHG1448 [pii] AID - 10.1016/j.ajhg.2013.05.020 [doi] PST - ppublish SO - Am J Hum Genet. 2013 Jul 11;93(1):167-72. doi: 10.1016/j.ajhg.2013.05.020. Epub 2013 Jun 20.