Abstract
Purpose
We have previously shown that the TT genotype (rs579459 location of the ABO gene) is significantly associated with circulating levels of e-selectin in patients with suspected obstructive sleep apnea (OSA). We hypothesized that this genotype would be associated with incident cardiovascular disease (CVD).
Methods
Patients with suspected OSA who had a full diagnostic polysomnogram from 2003 to 2011 were recruited; CV events occurring within 8 years of polysomnography were identified by linkage to provincial health databases. Cox proportional hazards models were used to evaluate the incidence of first CV events as a function of the rs579459 genotype.
Results
In this targeted study, 408 patients were studied, and 39 incident events were identified. A larger proportion of patients with the TT genotype had an event (31/247; 12.6%) than the CT and CC genotypes (8/161; 5.0%); in univariate analysis, the TT genotype was significantly associated with CV events (HR = 2.53; 95% CI = 1.16–5.51, p = 0.02). After adjustment for age, AHI, sex, smoking, diabetes, statin use, and BMI, the TT genotype remained a significant predictor (HR = 2.35; 95% CI = 1.02–5.42, p = 0.046). No events were found in patients with an absence of both OSA and the TT genotype (N = 30). The effect of the SNP was partially (16.2%) mediated by e-selectin levels.
Conclusion
This is the first study to examine genetic variants as a risk factor for incident CVD in the context of OSA. Although these results are preliminary and in need of replication, it suggests that genetic markers may become useful in helping to guide precision clinical care.
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Data availability
The data that support the findings of this study (health administrative data) are available from PopData BC but restrictions apply to the availability of these data, which were used after approval from them for the current study, and so are not publicly available.
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Funding
This work was supported a BC Lung Association Operating Grant, CIHR (Sleep Disordered Breathing Team Grant), Vancouver Coastal Health Research Institutes Investigator Award for (Dr. Rachel Jen). The sponsor had no role in the design of the study, the collection and analysis of the data, or the preparation of the manuscript.
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All procedures performed in studies involving human participants were in accordance with the ethical standards or the institutional and/or national research committee (UBC Clinical Research Ethics Board) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Hirsch Allen, A.J., Ghafoor, A.A., Liu, Y. et al. The rs579459 ABO gene polymorphism and risk of incident cardiovascular events in obstructive sleep apnea: a pilot study. Sleep Breath (2022). https://doi.org/10.1007/s11325-022-02638-7
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DOI: https://doi.org/10.1007/s11325-022-02638-7
Keywords
- Sleep apnea
- Cardiovascular disease
- Genetics