Clinical Assessment and Targeted Imaging to Characterize High-Risk Atherosclerotic Cardiovascular Disease of Survivors in SJLIFE

Official title

Clinical Assessment and Targeted Imaging to Characterize High-Risk Atherosclerotic Cardiovascular Disease of Survivors in the St. Jude Lifetime Cohort (SJLIFE)

Overview

Childhood cancer survivors are at increased risk for premature atherosclerotic cardiovascular disease (ASCVD) due to cancer treatment-related exposures, including radiation therapy and platinum-based chemotherapy. Current ASCVD risk assessment tools may underestimate cardiovascular risk in younger survivors. This observational study performs detailed cardiovascular phenotyping using imaging, blood-based biomarkers, and vascular function testing among adult survivors enrolled in the St. Jude Lifetime Cohort (SJLIFE), with comparison to community controls, to better characterize subclinical ASCVD risk and inform survivor-specific prevention strategies. Primary Objective: Perform deeper phenotyping of SJLIFE participants at treatment-related risk of atherosclerotic cardiovascular disease \[ASCVD\] to facilitate early detection of pathophysiological targets appropriate for remediation. Secondary Objectives: Determine the distribution of lipoprotein (a) levels and prevalence of elevated levels among survivors with any treatment related exposure-based risk for ASCVD overall and then compared to community controls. Evaluate prevalence of clinical and imaging markers of ASCVD risk among survivors exposed only to platinum chemotherapy and compare that to community controls.

Detailed description

Survivors of childhood cancer experience substantially increased risk of ischemic heart disease and stroke compared to the general population. This excess risk is largely driven by cancer therapy exposures such as chest or neck radiation and platinum-based chemotherapy. However, most evidence-based ASCVD screening and prevention guidelines are derived from populations aged 40 years or older without cancer therapy exposure, leaving younger survivors inadequately risk stratified.

This study leverages the St. Jude Lifetime Cohort (SJLIFE) to conduct enhanced cardiovascular phenotyping among survivors at treatment-related risk for ASCVD. Participants undergo coronary artery calcium (CAC) scoring using low-dose non-contrast ECG-gated CT, bilateral carotid ultrasound to assess carotid stenosis and intima-media thickness, blood-based measurement of lipoprotein(a), and noninvasive vascular function testing including pulse wave velocity, augmentation index, and arterial elasticity. A cohort of community control participants enrolled in SJLIFE undergoes identical testing.

The primary objectives are to determine the prevalence of abnormal CAC and carotid stenosis among at-risk survivors and to compare findings with community controls. Secondary objectives include characterization of lipoprotein(a) levels and assessment of ASCVD markers among survivors exposed solely to platinum chemotherapy.

The study uses a cross-sectional design with prospective longitudinal follow-up through ongoing participation in SJLIFE. Results are intended to inform future survivor-specific screening approaches and interventional trials.

Interventions

• Diagnostic test Coronary Artery Calcium Scan
  Low dose, ECG gated, non contrast cardiac computed tomography (CT) scan performed to quantify coronary artery calcium using the Agatston scoring method for assessment of subclinical coronary atherosclerosis.
• Diagnostic test Carotid Artery Ultrasound
  Bilateral high resolution B mode carotid ultrasound with color and spectral Doppler interrogation of the common carotid artery, carotid bulb, and internal carotid artery to assess carotid plaque, stenosis, and intima-media thickness.
• Diagnostic test Lipoprotein(a) Measurement
  Peripheral blood draw for measurement of serum lipoprotein(a) levels to identify ASCVD risk enhancing factors.
• Diagnostic test Vascular Function Testing
  Non invasive vascular function assessments including pulse wave velocity, augmentation index, and arterial elasticity using FDA cleared devices (e.g., SphygmoCor XCEL and HDI/PulseWave CR-2000) to evaluate arterial stiffness and vascular health.

Primary outcome measures

• Determine the prevalence of abnormal coronary artery calcium score among survivors with cancer treatment exposures associated with increased risk for ASCVD and ischemic heart disease overall and in comparison to community controls. [Time frame: Baseline]
• Determine the prevalence of carotid stenosis using carotid ultrasound among survivors with cancer treatment exposures associated with increased risk for ASCVD and stroke overall in comparison to community controls. [Time frame: Baseline]

Secondary outcome measures (2)

• Determine the distribution of lipoprotein (a) levels and prevalence of elevated levels among survivors with any treatment related exposure-based risk for ASCVD overall and then compared to community controls. [Time frame: Baseline]
• Evaluate prevalence of clinical and imaging markers of ASCVD risk among survivors exposed only to platinum chemotherapy and compare that to community controls. [Time frame: Baseline]

Eligibility criteria

Inclusion criteria

\- SJLIFE Survivor or Control

• Age ≥18 years
• Enrolled in the St. Jude Lifetime Cohort (SJLIFE)
• Participant or legal guardian/representative is able and willing to give informed consent.

SJLIFE Survivor only

• Participant has been treated with at least one of the following cancer therapies:

platinum chemotherapy, neck radiation exposure of at least 1000 centigray (cGy), or chest radiation exposure of at least 1000 cGy (with potential exposure to the heart).

Exclusion criteria

SJLIFE Survivor or Control

• Previous stroke or intervention for severe carotid arterial disease including carotid endarterectomy or carotid angioplasty and stent placement.
• Previous myocardial infarction or intervention for severe cardiovascular disease including Coronary Artery Bypass Graft (CABG), coronary stent placement or coronary angioplasty.
• History of aortic valve replacement
• Inability or unwillingness of research participant or legal guardian/representative to give written informed consent.

Control Only

• First degree relative of SJLIFE Survivor
• History of cancer

Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.

Healthy volunteers: No

Study design

Observational model

Cohort

Study locations

United States · 1 center

• St. Jude Children's Research Hospital — Memphis

Identifiers

NCT: NCT07594392 · CATCHASCVD · U01CA301480

Primary sources (government registries)

• ClinicalTrials.gov (US NIH)

View this study on ClinicalTrials.gov ↗