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Published on: May 14, 2017
Statin-dependent and -independent pathways are associated with major adverse cardiovascular events in people with HIV
Márton Kolossváry1, Irini Sereti2, Markella V Zanni1
1Metabolism Unit, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA.
Insights
Statin therapy reduces cardiovascular events in people with HIV (PWH). Angiopoietin-related protein 3 (ANGPTL3) and inflammatory pathways contribute to residual risk beyond LDL-cholesterol, impacting major adverse cardiovascular events (MACE).
Area of Science:
- Cardiology
- Immunology
- Genetics
Background:
- Statin therapy is known to reduce major adverse cardiovascular events (MACE) in people with HIV (PWH).
- However, residual MACE risk beyond LDL-cholesterol (LDL-C) reduction in PWH remains poorly understood.
- Identifying these residual risk pathways is crucial for improving cardiovascular outcomes in this population.
Purpose of the Study:
- To investigate the association of statin-responsive and other inflammatory/metabolic pathways with MACE in PWH.
- To evaluate the role of specific proteins, including angiopoietin-related protein 3 (ANGPTL3), in residual cardiovascular risk.
- To develop a machine-learning model for predicting MACE using proteomic data.
Main Methods:
- Utilized Cox proportional hazards models to analyze MACE associations with proteomic measurements from the REPRIEVE trial.
- Adjusted for time-updated statin use and baseline atherosclerotic cardiovascular disease risk score.
- Developed a machine-learning model to predict MACE based on baseline protein levels.
Main Results:
- Among proteins affected by statins, ANGPTL3 showed the strongest association with MACE (aHR: 2.31), indicating lower ANGPTL3 levels with statin use correlate with reduced MACE risk.
- Of proteins not altered by statins, 26 were linked to MACE, primarily involving humoral immune response, leukocyte chemotaxis, and cytokine pathways.
- The machine-learning model incorporating proteomic data achieved a concordance index of 0.74, outperforming traditional risk prediction models (C-index: 0.61).
Conclusions:
- ANGPTL3 and key inflammatory pathways contribute to residual MACE risk in PWH, independent of LDL-C levels.
- These findings highlight potential therapeutic targets for mitigating cardiovascular risk in people with HIV.
- Proteomic profiling offers a promising approach for enhancing MACE prediction in PWH.
Abstract:
BACKGROUNDStatin therapy lowers the risk of major adverse cardiovascular events (MACE) among people with HIV (PWH). Residual risk pathways contributing to excess MACE beyond LDL-cholesterol (LDL-C) are not well understood. Our objective was to evaluate the association of statin-responsive and other inflammatory and metabolic pathways with MACE in the Randomized Trial to Prevent Vascular Events in HIV (REPRIEVE).METHODSCox proportional hazards models were used to assess the relationship between MACE and proteomics measurements at study entry and year 2, adjusting for time-updated statin use and the baseline 10-year atherosclerotic cardiovascular disease risk score. We built a machine-learning (ML) model to predict MACE using baseline protein values with significant associations.RESULTSFor 765 individuals (age: 50.8 ± 5.9 years, 82% men, 18% women), among 7 proteins changing with statin versus placebo, angiopoietin-related protein 3 (ANGPTL3) related most strongly to MACE (adjusted HR [aHR]: 2.31 per 2-fold-higher levels; 95% CI: 1.11-4.80; P = 0.03), such that lower levels of ANGPTL3 achieved with statin therapy were associated with lower MACE risk. Among 248 proteins that did not change in response to statin therapy, 26 were associated with MACE at a FDR below 0.05. These proteins represented a predominantly humoral immune response, leukocyte chemotaxis, and cytokine pathways. Our proteomics ML model achieved a 10-fold cross-validated concordance index (C-index) of 0.74 ± 0.11 to predict MACE, improving on models using traditional risk prediction scores only (C-index: 0.61 ± 0.18).CONCLUSIONSANGPTL3, as well as key inflammatory pathways, may contribute to a residual risk of MACE among PWH, beyond LDL-C.TRIAL REGISTRATIONClinicalTrials.gov: NCT02344290.FUNDINGNIH, Kowa Pharmaceuticals America, Gilead Sciences, ViiV Healthcare.
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