HLA class II sequence variants influence tuberculosis risk in populations of European ancestry

Gardar Sveinbjornsson, Daniel F Gudbjartsson, Bjarni V Halldorsson, Karl G Kristinsson, Magnus Gottfredsson, Jeffrey C Barrett, Larus J Gudmundsson, Kai Blondal, Arnaldur Gylfason, Sigurjon Axel Gudjonsson, Hafdis T Helgadottir, Adalbjorg Jonasdottir, Aslaug Jonasdottir, Ari Karason, Ljiljana Bulat Kardum, Jelena Knežević, Helgi Kristjansson, Mar Kristjansson, Arthur Love, Yang LuoOlafur T Magnusson, Patrick Sulem, Augustine Kong, Gisli Masson, Unnur Thorsteinsdottir, Zlatko Dembic, Sergey Nejentsev, Thorsteinn Blondal, Ingileif Jonsdottir, Kari Stefansson

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Mycobacterium tuberculosis infections cause 9 million new tuberculosis cases and 1.5 million deaths annually. To identify variants conferring risk of tuberculosis, we tested 28.3 million variants identified through whole-genome sequencing of 2,636 Icelanders for association with tuberculosis (8,162 cases and 277,643 controls), pulmonary tuberculosis (PTB) and M. tuberculosis infection. We found association of three variants in the region harboring genes encoding the class II human leukocyte antigens (HLAs): rs557011[T] (minor allele frequency (MAF) = 40.2%), associated with M. tuberculosis infection (odds ratio (OR) = 1.14, P = 3.1 × 10(-13)) and PTB (OR = 1.25, P = 5.8 × 10(-12)), and rs9271378[G] (MAF = 32.5%), associated with PTB (OR = 0.78, P = 2.5 × 10(-12))--both located between HLA-DQA1 and HLA-DRB1--and a missense variant encoding p.Ala210Thr in HLA-DQA1 (MAF = 19.1%, rs9272785), associated with M. tuberculosis infection (P = 9.3 × 10(-9), OR = 1.14). We replicated association of these variants with PTB in samples of European ancestry from Russia and Croatia (P < 5.9 × 10(-4)). These findings show that the HLA class II region contributes to genetic risk of tuberculosis, possibly through reduced presentation of protective M. tuberculosis antigens to T cells.

Original languageEnglish
Pages (from-to)318-22
Number of pages5
JournalNature Genetics
Volume48
Issue number3
DOIs
Publication statusPublished - Mar 2016

Cite this

Sveinbjornsson, G., Gudbjartsson, D. F., Halldorsson, B. V., Kristinsson, K. G., Gottfredsson, M., Barrett, J. C., ... Stefansson, K. (2016). HLA class II sequence variants influence tuberculosis risk in populations of European ancestry. Nature Genetics, 48(3), 318-22. https://doi.org/10.1038/ng.3498