Platelet Volunteers, Longitudinal and Multi-omic Study

This observational study is looking for healthy volunteers to help researchers understand how platelets (a type of blood cell important for clotting and healing) work in healthy people. The study aims to learn more about how platelets clump together, how blood clots, and how genes and proteins are involved. Researchers also want to see how these processes change over time and how they are affected by things like diet, exercise, and weight. The goal is to establish and improve methods for studying platelets and to understand normal platelet function over a long period. They are looking to enroll 400 participants.

Study design
This is an observational study involving 400 healthy participants. Researchers will review medical history and ask about family history and medications.
What's involved
You would have a clinic visit once every 6 or 7 months for 10 years. You would need to fast for at least 10 hours and avoid aspirin or NSAIDs for 7 days before each blood draw.
Compensation
Not stated in the trial record.
Follow-up
Participants will be followed for 10 years, which is when the primary endpoints are measured.

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NCT07137429

Platelet Volunteers, Longitudinal and Multi-omic Study

Recruiting
Not specifiedAges 18+Observational
National Heart, Lung, and Blood Institute (NHLBI)
~400 participants
Updated 2026-07-31 on ClinicalTrials.gov

At a glance

Recruiting sites
1 of 1 listed site is recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Establish and validate technical assays and equipment (e.g. platelet aggregation, hemostasis measurements, methylation, RNA-seq, proteomics and WGS, in vitro iPSC.
Measured over 10 years
+1 more outcome measured
Thrombosis
1 sites across 1 states
Maryland1
  • Andrew D Johnson, Ph.D. · PRINCIPAL_INVESTIGATOR · National Heart, Lung, and Blood Institute (NHLBI)

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Eligibility criteria

Inclusion

Stated willingness to comply with all study procedures, including fasting at least 10 hours before each blood draw
Stated willingness to refrain from aspirin or non-steroidal anti-inflammatory drugs (NSAIDs) for 7 days prior to any visits
Age \>= 18 years
In good general health as evidenced by self-reported medical history

Exclusion

Current pregnancy or lactation
Active malignancies known, active known auto-immune disease, known major CVD (e.g., heart attack, stroke, venous thromboembolism, heart failure), severe bleeding history, on regular P2Y12 inhibitors or other antiplatelet treatments for a clinical reason, uncontrolled hypertension or diabetes
  • Establish and validate technical assays and equipment (e.g. platelet aggregation, hemostasis measurements, methylation, RNA-seq, proteomics and WGS, in vitro iPSC.10 years

    To provide a mechanism for collection of tissue samples from healthy volunteers for use in research studies relating to platelet biology.The goal is to obtain blood samples and corresponding derived information to optimize assays, understand variation in these assays due to different sources of variation, and conduct statistical association studies with appropriate designs including cross-sectional analysis, and longitudinal analyses. Environmental variables may include health reports, anthropometric variables, questions on habits and risk factors and medication during the study.

  • Establish normal physiologic mechanisms and platelet-related parameters. How these vary longitudinally and are influenced by variables (e.g., reproducibility, fluctuation with changing diet, exercise, weight and other factors.10 years

    To provide a mechanism for collection of tissue samples from healthy volunteers for use in research studies relating to platelet biology.The goal is to obtain blood samples and corresponding derived information to optimize assays, understand variation in these assays due to different sources of variation, and conduct statistical association studies with appropriate designs including cross-sectional analysis, and longitudinal analyses. Environmental variables may include health reports, anthropometric variables, questions on habits and risk factors and medication during the study.