Contribution of the Pharmacological Profile of the A2A Receptor to Adenosine in the Diagnosis of Myocardial Ischemia

Study Overview
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Brief Summary
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The chronic coronary artery disease could be detected by a drop in the expression of A2A receptors to adenosine, while high values of the KD / EC50 ratio are a sign of coronary ischemia. Knowing the number of A2A receptors in circulating lymphocytes could allow detection of coronary artery disease and evaluating the functionality of A2A receptors in circulating lymphocytes could allow quantification of myocardial ischemia. Thus, a simple and unique blood sample would quickly detect patients with life-threatening coronary ischemia. This would avoid prolonged hospitalizations and costly non-invasive tests (stress echocardiography, myocardial scintigraphy) in patients without coronary artery disease.

Detailed Description
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The main objective of this study is to evaluate the discriminating capacities of A2A adenosine receptors expression on the surface of circulating lymphocytes for the detection of coronary artery disease in patients hospitalized for surgery of the aorta and / or arteries of the lower limbs. The secondary objectives are: Assessment of the discriminating capacities of the functionality (KD / EC50) of A2A adenosine receptors on the surface of circulating lymphocytes, for the diagnosis of myocardial ischemia in patients hospitalized for surgery of the aorta and / or arteries of legs. Determinate the best threshold for discriminating patients with coronary artery disease and estimate the discriminating performance associated with this threshold. Determinate the best threshold for discriminating patients with myocardial ischemia and estimate the discriminating performance associated with this threshold.

Official Title
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Contribution of the Pharmacological Profile of the A2A Receptor to Adenosine in the Diagnosis of Myocardial Ischemia

Conditions
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Chronic Coronary Artery Disease

Intervention / Treatment
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* Biological: blood sample


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients admitted for preoperative assessment of vascular surgery of the aorta and / or arteries of the lower limbs. Adult person (age> 18). Affiliated with a social security scheme. Signature of informed consent. Exclusion Criteria: Patients with a history of coronary artery disease awaiting revascularization. Hyperthyroidism, anemia (Hb <13 g / dL). Contraindication to the practice of coronary angiography, stress echocardiography or myocardial scintigraphy. Unstable hemodynamic state or cardiogenic shock. Adults protected under guardianship, curatorship or legal protection. Pregnant or lactating women

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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No

Study Plan
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How is the study designed?
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Design Details

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


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: patients hospitalized<br>for surgery of the aorta and / or arteries of the lower limbs. | Biological: blood sample<br>* measuring the expression and function of lymphocyte A2A receptors.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Dosage of adenosine | measuring the expression and function of lymphocyte A2A receptors. | 24 MONTHS |