FUT2–ABO epistasis increases the risk of early childhood asthma and Streptococcus pneumoniae respiratory illnesses

Tarunveer S. Ahluwalia, Anders U. Eliasen, Astrid Sevelsted, Casper Emil T. Pedersen, Jakob Stokholm, Bo Chawes, Jette Bork-Jensen, Niels Grarup, Oluf Pedersen, Torben Hansen, Allan Linneberg, Amitabh Sharma, Scott T. Weiss, Michael D. Evans, Daniel J. Jackson, Andreanne Morin, Karen A. Krogfelt, Susanne Schjørring, Preben B. Mortensen, David M. HougaardJonas Bybjerg-Grauholm, Marie Bækvad-Hansen, Ole Mors, Merete Nordentoft, Anders D. Børglum, Thomas Werge, Esben Agerbo, James E. Gern, Robert F. Lemanske, Carole Ober, Anders G. Pedersen, Hans Bisgaard, Klaus Bønnelykke*

*Corresponding author for this work

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Abstract

Asthma with severe exacerbation is the most common cause of hospitalization among young children. We aim to increase the understanding of this clinically important disease entity through a genome-wide association study. The discovery analysis comprises 2866 children experiencing severe asthma exacerbation between ages 2 and 6 years, and 65,415 non-asthmatic controls, and we replicate findings in 918 children from the Copenhagen Prospective Studies on Asthma in Childhood (COPSAC) birth cohorts. We identify rs281379 near FUT2/MAMSTR on chromosome 19 as a novel risk locus (OR = 1.18 (95% CI = 1.11–1.25), Pdiscovery = 2.6 × 10−9) as well as a biologically plausible interaction between functional variants in FUT2 and ABO. We further discover and replicate a potential causal mechanism behind this interaction related to S. pneumoniae respiratory illnesses. These results suggest a novel mechanism of early childhood asthma and demonstrates the importance of phenotype-specificity for discovery of asthma genes and epistasis.

Original languageEnglish
Article number6398
JournalNature Communications
Volume11
Issue number1
Number of pages12
ISSN2041-1723
DOIs
Publication statusPublished - 2020

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