A Study of Immunological Biomarkers as Predictors of Cardiovascular Events

Study Overview
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Brief Summary
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Cardiovascular disease linked to atherosclerosis (e.g. infarcts, cerebro-vascular accidents) are one of the main causes of mortality in the general population. The recruitment of macrophages from the walls of the arterial lumen followed by unregulated capture of oxidated LDL (LDLox) leads to the accumulation of cholesterol esters and the formation of foamy cells characteristic of fatty streaks, the first phase of atherogenesis. These fatty streaks are rarely followed by clinical events, but can progress to complicated atheromatoses (calcification, rupture) resulting in the occurrence of various clinical events such as myocardial infarction and cerebro-vascular accidents (CVA). Once oxidated, LDL becomes immunogenic and induces anti-LDLox antibody production that could be markers of progression of atherosclerosis. During LDL oxidation, a multitude of specific oxidative epitopes (SOE) such as oxidated phospholipids (PLox) and malondialdehyde-lysine epitopes (MDA) are generated. In order to measure the level of markers in the blood, researchers developed a series of immunologic levels in vitro, using specific antibodies directed against well-defined epitopes. Recently, it was shown that Lp(a ) would be the preferred transporter of these PLox. In fact, several clinical studies show a strong correlation between PLox/apoB concentrations and Lp(a). This marker (PLox/apoB) predicts future morbidity and mortality due to cardiovascular diseases, including CVA, up to 15 years in advance, independent of all other known risk factors. CD36 is a scavenger receptor that recognizes LDLox, but more specifically PLox present in these lipoproteins .One soluble form of inflammatory CD36 (sCD36) was recently identified. In this study, only healthy volunteers were recruited in order to be able to establish normal serum ranges of different immunologic biomarkers.

Official Title
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A Study of Immunological Biomarkers as Predictors of Cardiovascular Events

Conditions
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Cardiovascular Abnormalities

Intervention / Treatment
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* Other: blood tests


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Healthy adults Persons providing signed informed consent Persons with healthcare coverage Exclusion Criteria: Renal disease Cardiovascular disease Auto immune disease Pregnancy in progress Infection Dementia Persons under legal protection Malnutrition

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Basic Science
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: blood<br>blood tests | Other: blood tests<br>* Blood tests done by the nurse in the CRC (clinical research center). The quantity of blood taken wil be (3 5-mL tubes): 2 plain tubes and 1EDTA tube Arterial blood pressure will be measured at the CRC. Then, an X-ray of the profile of the abdomen will be taken without preparation to evaluate aortic calcification (in the radiology department of the Amiens hospital)<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Blood level of immunologic biomarker PLox/apoB |  | Day 0 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Cardiovascular events