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Title: Associations of variants In the hexokinase 1 and interleukin 18 receptor regions with oxyhemoglobin saturation during sleep.

Authors: Cade, Brian E; Chen, Han; Stilp, Adrienne M; Louie, Tin; Ancoli-Israel, Sonia; Arens, Raanan; Barfield, Richard; Below, Jennifer E; Cai, Jianwen; Conomos, Matthew P; Evans, Daniel S; Frazier-Wood, Alexis C; Gharib, Sina A; Gleason, Kevin J; Gottlieb, Daniel J; Hillman, David R; Johnson, W Craig; Lederer, David J; Lee, Jiwon; Loredo, Jose S; Mei, Hao; Mukherjee, Sutapa; Patel, Sanjay R; Post, Wendy S; Purcell, Shaun M; Ramos, Alberto R; Reid, Kathryn J; Rice, Ken; Shah, Neomi A; Sofer, Tamar; Taylor, Kent D; Thornton, Timothy A; Wang, Heming; Yaffe, Kristine; Zee, Phyllis C; Hanis, Craig L; Palmer, Lyle J; Rotter, Jerome I; Stone, Katie L; Tranah, Gregory J; Wilson, James G; Sunyaev, Shamil R; Laurie, Cathy C; Zhu, Xiaofeng; Saxena, Richa; Lin, Xihong; Redline, Susan

Published In PLoS Genet, (2019 Apr)

Abstract: Sleep disordered breathing (SDB)-related overnight hypoxemia is associated with cardiometabolic disease and other comorbidities. Understanding the genetic bases for variations in nocturnal hypoxemia may help understand mechanisms influencing oxygenation and SDB-related mortality. We conducted genome-wide association tests across 10 cohorts and 4 populations to identify genetic variants associated with three correlated measures of overnight oxyhemoglobin saturation: average and minimum oxyhemoglobin saturation during sleep and the percent of sleep with oxyhemoglobin saturation under 90%. The discovery sample consisted of 8,326 individuals. Variants with p < 1 × 10(-6) were analyzed in a replication group of 14,410 individuals. We identified 3 significantly associated regions, including 2 regions in multi-ethnic analyses (2q12, 10q22). SNPs in the 2q12 region associated with minimum SpO2 (rs78136548 p = 2.70 × 10(-10)). SNPs at 10q22 were associated with all three traits including average SpO2 (rs72805692 p = 4.58 × 10(-8)). SNPs in both regions were associated in over 20,000 individuals and are supported by prior associations or functional evidence. Four additional significant regions were detected in secondary sex-stratified and combined discovery and replication analyses, including a region overlapping Reelin, a known marker of respiratory complex neurons.These are the first genome-wide significant findings reported for oxyhemoglobin saturation during sleep, a phenotype of high clinical interest. Our replicated associations with HK1 and IL18R1 suggest that variants in inflammatory pathways, such as the biologically-plausible NLRP3 inflammasome, may contribute to nocturnal hypoxemia.

PubMed ID: 30990817 Exiting the NIEHS site

MeSH Terms: No MeSH terms associated with this publication

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