Daily Cardiology Research Analysis
Three impactful cardiology studies stood out: a population-based cohort linked adolescent blood pressure to a dose-dependent burden of coronary atherosclerosis in midlife; mechanistic work identified endothelial ABCB8 as a mitochondrial iron/CoQ redox rheostat suppressing ferroptosis and atherosclerosis; and a multi-ethnic cohort showed high-sensitivity CRP predicts ASCVD events in Europeans and Africans but not South Asians, challenging biomarker generalizability.
Summary
Three impactful cardiology studies stood out: a population-based cohort linked adolescent blood pressure to a dose-dependent burden of coronary atherosclerosis in midlife; mechanistic work identified endothelial ABCB8 as a mitochondrial iron/CoQ redox rheostat suppressing ferroptosis and atherosclerosis; and a multi-ethnic cohort showed high-sensitivity CRP predicts ASCVD events in Europeans and Africans but not South Asians, challenging biomarker generalizability.
Research Themes
- Adolescent blood pressure and lifetime coronary atherosclerosis risk
- Endothelial ferroptosis and mitochondrial redox control in atherogenesis
- Ethnic heterogeneity in inflammatory biomarkers for ASCVD prediction
Selected Articles
1. Blood Pressure in Adolescence and Atherosclerosis in Middle Age.
In 10,222 Swedish men followed for a median 39.5 years, higher adolescent blood pressure showed a dose–response association with midlife coronary stenosis assessed by CCTA. Stage 2 hypertension in adolescence conferred an OR 1.84 for severe (≥50%) stenosis versus normal BP, and even guideline-defined ‘elevated’ adolescent BP was linked to higher risk, with stronger effects for systolic BP.
Impact: This study links adolescent BP categories to quantified coronary atherosclerosis decades later using CCTA, strengthening the case for primordial prevention in youth. It operationalizes risk at widely used guideline thresholds.
Clinical Implications: Prioritize early-life BP screening and interventions, including lifestyle counseling and careful monitoring of adolescents with ‘elevated’ BP, given long-term associations with severe coronary stenosis. Systolic BP deserves particular focus.
Key Findings
- Adolescent stage 2 hypertension was associated with severe (≥50%) coronary stenosis in middle age (OR 1.84; 95% CI 1.40–2.42).
- Even ‘elevated’ adolescent BP (per 2025 ACC/AHA and 2024 ESC definitions) was linked to increased severe atherosclerosis risk.
- Associations were stronger for systolic than diastolic blood pressure across categories.
Methodological Strengths
- Population-based linkage of adolescent BP with midlife CCTA in 10,222 participants
- Robust analyses including multinomial regression, adjusted prevalences, and spline models
Limitations
- All-male cohort (military conscripts) limits generalizability to women
- Observational design with potential residual confounding
Future Directions: Extend analyses to women and diverse populations; evaluate whether adolescent BP lowering modifies CCTA plaque burden trajectories and clinical events.
IMPORTANCE: Elevated blood pressure (BP) in adolescence has been linked to higher risk of cardiovascular disease mortality, as well as surrogate markers of atherosclerosis, such as carotid intima-media thickness and coronary artery calcification. However, these markers do not fully capture the complex spectrum of subclinical atherosclerotic cardiovascular disease. OBJECTIVE: To examine the association between systolic and diastolic BP in adolescence and atherosclerosis in middle age, measured by coronary computed tomography angiography (CCTA). DESIGN, SETTING, AND PARTICIPANTS: This population-based cohort study conducted in Sweden linked BP data from the Swedish Military Conscription Register (1972-1987) during adolescence to atherosclerosis data from the Swedish Cardiopulmonary Bioimage Study (2013-2018) during middle age. Data analyses were performed in May 2025. EXPOSURE: Adolescent BP was categorized according to the 2025 American College of Cardiology/American Heart Association (ACC/AHA) and the 2024 European Society of Cardiology (ESC) guidelines. MAIN OUTCOMES AND MEASURES: The primary outcome was coronary atherosclerosis, evaluated via CCTA stenosis. The associations were analyzed using multinomial logistic regression, adjusted (marginal) prevalences, and restricted cubic splines. RESULTS: A total of 10 222 men with mean (SD) age of 18.3 (0.5) years at baseline and median (IQR) age of 57.8 (53.4-61.2) years at follow-up were included. At baseline, mean (SD) systolic BP (SBP) and diastolic BP (DBP) were 127.6 (10.7) mm Hg and 68.3 (9.5) mm Hg, respectively. After a median (IQR) follow-up of 39.5 (35.2-42.8) years, 4159 participants (45.7%) had 1% to 49% coronary stenosis and 784 (8.6%) had 50% or greater coronary stenosis. Elevated BP in adolescence was associated with coronary stenosis in a dose-response fashion. Adolescents with stage 2 hypertension had a higher risk of severe coronary stenosis (≥50%), with an odds ratio of 1.84 (95% CI, 1.40-2.42) and an adjusted prevalence of 10.1% (95% CI, 8.6%-11.5%) compared to those with normal BP (adjusted prevalence, 6.9%; 95% CI, 5.7%-8.1%). Elevated BP categories according to the 2025 ACC/AHA (120-129/<80 mm Hg) and the 2024 ESC (120-139/70-89 mm Hg) were associated with severe coronary atherosclerosis in middle age. The association was stronger for SBP than for DBP. CONCLUSIONS AND RELEVANCE: In this population-based cohort study, higher BP levels in adolescence were associated with a dose-dependent higher risk for atherosclerosis in middle age, particularly for severe coronary atherosclerosis. Excess risks of atherosclerosis were even evident in the elevated BP range in adolescence as defined by the 2025 ACC/AHA and 2024 ESC BP guidelines.
2. ATP-binding cassette B8 prevents endothelial dysfunction and atherosclerosis.
Endothelial ABCB8 loss activated a TGF-β–driven, iron-dependent mitochondrial ROS program, promoting endothelial damage and atherogenesis. Endothelial-specific Abcb8 knockout exacerbated plaque formation, whereas a rationally designed small molecule (CP50) upregulated CYB5R1-related anti-ferroptotic defenses and markedly reduced atherosclerosis in mice.
Impact: Reveals a novel endothelial ABCB8–iron–TGF-β axis linking mitochondrial redox to ferroptosis and atherogenesis, and demonstrates pharmacologic tractability in vivo.
Clinical Implications: Identifies a potentially druggable pathway to protect endothelium by modulating mitochondrial iron/redox and ferroptosis; supports development of agents targeting ABCB8-related signaling to prevent or treat atherosclerosis.
Key Findings
- Endothelial ABCB8 deficiency induced TGF-β upregulation and signaling, acting as an iron effector to drive mitochondrial ROS and damage.
- Endothelial-specific Abcb8 knockout mice developed significantly worsened atherosclerotic plaque burden.
- A small-molecule (CP50) upregulated anti-ferroptotic defenses (e.g., preserving GPX4), limited lipid oxidation, and markedly inhibited atherogenesis in vivo.
Methodological Strengths
- Mechanistic depth across endothelial cell biology with in vivo endothelial-specific knockout models
- Pharmacologic validation with a rationally designed small molecule demonstrating disease modulation
Limitations
- Preclinical models; lack of human interventional data
- Potential off-target effects and long-term safety of CP50 not established
Future Directions: Validate ABCB8–iron–TGF-β signaling in human vascular tissues and test translational candidates targeting this axis in large-animal models and early-phase trials.
ATP-binding cassette B8 (ABCB8) is a mitochondrial iron exporter known to prevent iron-dependent oxidative stress in cardiomyocytes and endothelial cells. However, the role of ABCB8 in endothelial and vascular function remains unclear. Here, we identified ABCB8 as a key regulator of vascular homeostasis. We found that loss of ABCB8 in endothelial cells triggers a pro-inflammatory transcriptional program, marked by upregulation of TGF-β isoforms and activation of TGF-β signalling. We show that TGF-β functions as an iron effector that drives mitochondrial reactive oxygen species (ROS) and mitochondrial damage, revealing a new ABCB8-iron-TGF-β axis in endothelial cells. In endothelial-specific inducible Abcb8 knockout mice (Abcb8
3. High-sensitivity C-reactive protein and cardiovascular events in a multi-ethnic cohort: the HELIUS study.
Among 14,663 adults from six ethnic groups, hsCRP predicted cardiovascular events in European and African participants (adjusted HR per 1 mg/L ≈ 1.08–1.09) but not in South Asians, despite higher hsCRP and event rates. Findings question hsCRP’s utility for ASCVD risk stratification in South Asians and highlight the need for alternative inflammatory markers.
Impact: Demonstrates ethnic heterogeneity in hsCRP’s prognostic value, challenging a one-size-fits-all use of inflammatory biomarkers and informing tailored risk assessment.
Clinical Implications: Risk calculators and preventive strategies relying on hsCRP should be applied cautiously in South Asian individuals; development and validation of alternative biomarkers for this high-risk group is warranted.
Key Findings
- South Asian participants had the highest baseline hsCRP and highest ASCVD event rates but no association between hsCRP and events.
- hsCRP was associated with incident cardiovascular events in European (HR 1.08 per 1 mg/L) and African (HR 1.09 per 1 mg/L) participants.
- Median follow-up was 8.8 years with 568 events across 14,663 participants spanning six ethnic groups.
Methodological Strengths
- Large, multi-ethnic, population-based cohort with registry-ascertained outcomes
- Standardized biomarker assessment and ethnicity-stratified analyses
Limitations
- Observational design; residual confounding possible
- Single baseline hsCRP measurement; biomarker dynamics not captured
Future Directions: Identify and validate alternative inflammatory biomarkers or composite panels for South Asian populations; assess incremental value over traditional risk factors.
AIM: Elevated high-sensitivity C-reactive protein (hsCRP) concentrations are associated with an increased atherosclerotic cardiovascular risk, but this has not been extensively investigated in multi-ethnic populations, including South Asians, who are characterized by an increased cardiometabolic risk. METHODS: In this general population study we included 14,663 participants from the HEalthy Life In an Urban Setting (HELIUS) study (Dutch, South-Asian Surinamese, African Surinamese, Ghanaian, Turkish and Moroccan origin). Mortality and cardiovascular event data were collected from nationwide registries. Differences in hsCRP levels and the association between hsCRP and cardiovascular events across the ethnic groups were assessed. RESULTS: The mean age was 44±13 years, 55% were female. Median hsCRP at baseline was 1.0 (0.5-2.1) mg/L in the European, 1.3 (0.6-2.7) mg/L in the African, and 1.6 (0.7-3.3) mg/L in the South Asian participants (p <0.001). A total number of 568 cardiovascular events were recorded over a median follow-up time of 8.8 (7.8-9.7) years. hsCRP was associated with cardiovascular events in the European and African participants (adjusted HR per 1 mg/L increase in hsCRP: 1.08 [95% CI 1.00-1.16]; and 1.09 [95% CI 1.03-1.16], respectively), but not in the South Asian participants, despite having the highest event rate. CONCLUSIONS: hsCRP was associated with incident cardiovascular events in individuals of European and African descent but not in South Asian individuals, despite higher hsCRP values. These findings suggest the need to find alternative inflammatory biomarkers to allow for a more reliable assessment of the increased cardiometabolic risk in South Asian individuals. This study investigated the association between high-sensitivity C-reactive protein (hsCRP), a biomarker that reflects inflammation, across ethnic groups in the Netherlands, including participants of European, African and South Asian descent.We found that South Asian individuals had the highest concentrations of hsCRP and the highest rate of ASCVD events after 8.8 years of follow-up.In European and African participants, hsCRP concentrations were associated with cardiovascular events. Despite the higher hsCRP concentrations and the higher event rate in South Asian participants, we found no association between hsCRP and cardiovascular events. The present study suggests that hsCRP is not a reliable biomarker for ASCVD events in South Asian individuals. These findings emphasize the need to identify alternative inflammatory biomarkers to allow for a more reliable assessment of the increased cardiometabolic risk in South Asian individuals.