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Prediction of HIV-1 Coreceptor Usage Tropism by Sequence Analysis using a Genotypic Approach
Published on: December 1, 2011
Polygenic Risk Scores for Prediction of Subclinical Coronary Artery Disease in Persons With Human Immunodeficiency
Isabella C Schoepf1,2,3, Christian W Thorball4,5, Helen Kovari6
1Department of Infectious Diseases, Bern University Hospital, University of Bern, Bern, Switzerland.
Insights
Polygenic risk scores (PRS) are linked to subclinical coronary artery disease (CAD) in people with human immunodeficiency virus (HIV). Combining genetic and nongenetic factors offers the best prediction for CAD in this population.
Area of Science:
- Cardiovascular Health
- Genetics
- HIV Medicine
Background:
- People with human immunodeficiency virus (HIV) have an increased risk of coronary artery disease (CAD).
- The association between polygenic risk scores (PRS) and subclinical CAD in people with HIV (PWH) is not well understood.
Purpose of the Study:
- To investigate the association between PRS and subclinical CAD in PWH.
- To determine if genetic risk factors improve CAD risk prediction in PWH.
Main Methods:
- Subclinical CAD was defined by coronary CT angiography findings (plaque characteristics or coronary artery calcium scores).
- Genome-wide PRS for CAD, carotid intima-media thickness, and longevity were validated in 345 Swiss HIV Cohort Study participants.
- Associations between PRS, nongenetic risk factors, and subclinical CAD were assessed using logistic regression.
Main Results:
- CAD-associated PRS and IMT-associated PRS were significantly associated with subclinical CAD (soft, mixed, or high-risk plaque and high coronary artery calcium scores).
- Individuals with unfavorable CAD-PRS had significantly higher odds of subclinical CAD.
- Adding CAD-PRS to nongenetic risk factors improved the prediction of subclinical CAD.
Conclusions:
- Individual CAD-associated PRS are independently associated with subclinical CAD in people with HIV.
- A combined model of nongenetic and genetic cardiovascular risk factors provides the most effective prediction of subclinical CAD in PWH.
Background:
In people with human immunodeficiency virus (HIV) (PWH), individual polygenic risk scores (PRSs) are associated with coronary artery disease (CAD) events. Whether PRSs are associated with subclinical CAD is unknown.
Methods:
In Swiss HIV Cohort Study participants of European descent, we defined subclinical CAD as presence of soft, mixed, or high-risk plaque (SMHRP) on coronary computed tomography (CT) angiography, or as participants in the top tertile of the study population's coronary artery calcium (CAC) score, using noncontrast CT. We obtained univariable and multivariable odds ratios (ORs) for subclinical CAD endpoints based on nongenetic risk factors, and validated genome-wide PRSs built from single nucleotide polymorphisms associated with CAD, carotid intima-media thickness (IMT), or longevity in the general population.
Results:
We included 345 genotyped participants (median age, 53 years; 89% male; 96% suppressed HIV RNA); 172 and 127 participants had SMHRP and CAC, respectively. CAD-associated PRS and IMT-associated PRS were associated with SMHRP and CAC (all P < .01), but longevity PRS was not. Participants with unfavorable CAD-PRS (top quintile) had an adjusted SMHRP OR = 2.58 (95% confidence interval [CI], 1.18-5.67), and a CAC OR = 3.95 (95% CI, 1.45-10.77) vs. bottom quintile. Unfavorable nongenetic risk (top vs. bottom quintile) was associated with adjusted SMHRP OR = 24.01 (95% CI, 9.75-59.11), and a CAC-OR = 65.07 (95% CI, 18.48-229.15). Area under the receiver operating characteristic curve increased when we added CAD-PRS to nongenetic risk factors (SMHRP: 0.75 and 0.78, respectively; CAC: 0.80 and 0.83, respectively).
Conclusions:
In Swiss PWH, subclinical CAD is independently associated with an individual CAD-associated PRS. Combining nongenetic and genetic cardiovascular risk factors provided the most powerful subclinical CAD prediction.
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