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ORIGINAL RESEARCH

Exploring the Shared Genetic Architecture Between Obstructive Sleep Apnea and Body Mass Index

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Pages 711-723 | Received 19 Feb 2024, Accepted 25 May 2024, Published online: 07 Jun 2024

Figures & data

Figure 1 Overall study design of genome-wide cross-trait analysis.

Abbreviations: OSA, obstructive sleep apnea; BMI, body mass index; LDSC, linkage disequilibrium score regression; HDL, high-definition likelihood; ρ-HESS, rho-heritability estimation from summary statistics; TSMR, two sample Mendelian randomization; MTAG, Multi-Trait Analysis of GWAS; CPASSOC, Cross Phenotype Association; MAGMA, Multi-marker Analysis of GenoMic Annotation; SMR, Summary-data-based Mendelian randomization.
Figure 1 Overall study design of genome-wide cross-trait analysis.

Figure 2 Local genetic correlation between OSA and BMI. Manhattan plot displayed the calculations of the local genetic correlation and local genetic covariance between OSA and BMI, along with their respective local SNP heritability. The presence of red and blue bars in “local genetic correlation” and “local genetic covariance” indicate significant regions sharing SNP heritability. These regions meet the criteria (P < 5e-08 in local SNP heritability test, and P < 0.05/1703 in local genetic covariance test).

Figure 2 Local genetic correlation between OSA and BMI. Manhattan plot displayed the calculations of the local genetic correlation and local genetic covariance between OSA and BMI, along with their respective local SNP heritability. The presence of red and blue bars in “local genetic correlation” and “local genetic covariance” indicate significant regions sharing SNP heritability. These regions meet the criteria (P < 5e-08 in local SNP heritability test, and P < 0.05/1703 in local genetic covariance test).

Figure 3 Forest plots of bidirectional MR analysis between OSA and BMI. (A) forward MR analysis; (B) reverse MR analysis.

Abbreviations: MR, Mendelian randomization; OSA, obstructive sleep apnea; BMI, body mass index.
Figure 3 Forest plots of bidirectional MR analysis between OSA and BMI. (A) forward MR analysis; (B) reverse MR analysis.

Figure 4 Tissue specific enrichment of SNP heritability for OSA and BMI. A total of 12 tissues were shared in enrichment of SNP heritability for OSA and BMI after adjustment (P < 0.005/54). Blue line indicates threshold 0.05 for P value, and red line indicates 0.05/54.

Abbreviations: OSA, obstructive sleep apnea; BMI, body mass index.
Figure 4 Tissue specific enrichment of SNP heritability for OSA and BMI. A total of 12 tissues were shared in enrichment of SNP heritability for OSA and BMI after adjustment (P < 0.005/54). Blue line indicates threshold 0.05 for P value, and red line indicates 0.05/54.

Table 1 Six Genes Obtained from the Intersection of Genes Identified by SMR and Those Associated with Colocalized SNPs

Data Sharing Statement

The GWAS summary statistics for OSA and BMI are publicly available from https://r9.finngen.fi/, and https://gwas.mrcieu.ac.uk/, respectively.