Discovery of New Circulating Biomarkers of Coronary Atherosclerosis

Coronary Artery Disease Clinical Trial

Official title:

Discovery of New Circulating Biomarkers of Coronary Atherosclerosis Using Differential Proteomics: the BIOmarkers of CORonary Events (BIOCORE) Study

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT00430820
• Other study ID #: P060201
• Status: Completed
• Phase: N/A
• First received: February 1, 2007
• Last updated: December 2, 2010
• Start date: March 2007
• Est. completion date: November 2009

Study information

• Verified date: April 2009
• Source: Assistance Publique - Hôpitaux de Paris
• Contact: n/a
• Is FDA regulated: No
• Health authority: France: Ministry of Health
• Study type: Observational

Clinical Trial Summary

The study hypothesis is that differential proteomic techniques can be used to discover new circulating biomarkers of coronary atherosclerosis in the blood of patients suffering from coronary artery disease (either stable or unstable) who will be compared to a group of patients without coronary artery disease

Description:

Hypothesis: Our hypothesis is that coronary atherosclerosis induces both quantitative and qualitative modifications of circulating proteins, which can be captured by a differential proteomic approach applied to serum or plasma samples. Identification of such modifications in the circulating blood of patients with coronary artery disease (versus patients without coronary artery disease) and/or of patients with acute coronary syndromes (versus stable coronary artery disease) may lead to discovery of new biomarkers of coronary atherosclerosis and of atherosclerotic plaque vulnerability.

Objectives:

Primary objective: Identification of new circulating biomarkers of stable and unstable coronary artery disease using a new approach of differential proteomics.

Secondary objectives:

• Evaluation of the diagnostic value of these new biomarkers for the diagnosis of stable and unstable coronary artery disease.

• Comparison of the diagnostic value of these new biomarkers to the diagnostic value of 1) other validated biomarkers of atherosclerosis (eg, CRP, IL-6, CD40L, markers of leukocyte activation, …); and 2) of non-invasive measures of arterial function (eg, carotid artery intima-media thickness, pulse wave velocity, ankle/brachial index, …)

• Description of the relationship between these new biomarkers and major adverse coronary events (death, myocardial infarction, revascularization) during a 12-month follow-up.

Methods:

Uniq center, prospective study. Three groups of patients will be studied. Group 1:

Non-ST-elevation acute myocardial infarction; Group 2: Stable coronary artery disease; Group 3: normal coronary arteries and absence of other detectable atherosclerotic lesions.

A new proteomic approach will be applied to serum and plasma samples obtained 1 month after the index hospitalisation. This approach includes 3 steps: 1) equalisation of circulating proteins (expose low-concentration proteins belonging to the "deep-proteome"); 2) Retention chromatography; and 3) protein separation using 2D-electrophoresis and Surface-Enhanced Laser Desorption/Ionisation Time-of-Flight (SELDI-TOF).

Biomarkers with the highest diagnostic value will be subsequently identified using Matrix-Assisted Laser Desorbtion/Ionisation Time-of-Flight (MALDI-TOF) and tandem mass spectrometry (MS/MS).

Perspectives:

Validation of the diagnostic and prognostic values of the new biomarkers discovered and identified using the proteomic approach described above will require development of more straightforward measurement techniques (eg, ELISA), which will be used prospectively or retrospectively in other cohorts of patients with coronary artery disease. Basic studies will be performed in parallel, so as to better understand the role of these new biomarkers in the pathophysiology of atherosclerosis.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 124
• Est. completion date: November 2009
• Est. primary completion date: July 2009
• Accepts healthy volunteers: No
• Gender: Both
• Age group: 18 Years to 80 Years

Eligibility

Inclusion Criteria:

• Group 1 (Non-ST-elevation acute myocardial infarction) :

• Chest pain less than 48 hours before admission,

• And modifications of ST-T (no persistent ST elevation) on 12-lead EKG,

• And elevation of troponin-I >1xN,

• And presence of =1 de novo stenosis(es) >50% located on =1 native coronary artery(ies) and successfully treated using percutaneous coronary intervention and stenting.

• Group 2 (Stable coronary artery disease) :

• Documented myocardial ischemia (stable angina or positive stress test)

• And presence of =1 de novo stenosis(es) >50% located on =1 native coronary artery(ies) and successfully treated using percutaneous coronary intervention and stenting.

• Group 3 (Normal coronary arteries) :

• No history of coronary artery disease, neurovascular disease or peripheral artery disease,

• And normal coronary angiography performed because of suspected coronary artery disease

• And absence of significant functional or anatomic abnormalities suggestive of atherosclerosis on non-invasive arterial studies (measurements of intima-media thickness, pulse wave velocity, ankle-brachial index, …).

Exclusion Criteria:

• Group 1 :

• Preexisting EKG abnormalities (including left bundle branch block) precluding accurate assessment of ST-T changes

• Group 2 :

• History of acute coronary syndrome

• Groups 1 and 2:

• Culprit coronary artery stenosis is a restenosis or a stent thrombosis or is located in a bypass graft.

• All groups :

• Heart failure (NYHA class =II)

• Left ventricular ejection fraction <50%

• Severe valvular heart disease requiring surgical or percutaneous therapy

• History of autoimmune, inflammatory or neoplasia diseases ; or infectious disease in the month before admission

• Life expectancy < 1 year

• Age <18 years or >80 years

• Current pregnancy or breast-feeding

• Homeless or travelers who may not be followed-up

• Refusal to sign the informed consent form

Study Design

Time Perspective: Prospective

Related Conditions & MeSH terms

• Acute Coronary Syndrome
• Acute Coronary Syndromes
• Atherosclerosis
• Coronary Artery Disease
• Coronary Disease
• Infarction
• Myocardial Infarction
• Myocardial Ischemia

Intervention

Procedure:
• per intervention
per intervention

Locations

Country	Name	City	State
France	Department of Cardiology, Hopital Bichat, APHP	Paris

Sponsors (3)

Lead Sponsor	Collaborator
Assistance Publique - Hôpitaux de Paris	Fédération Française de Cardiologie, Société Française de Cardiologie

Country where clinical trial is conducted

France, 

References & Publications (4)

Blanco-Colio LM, Martín-Ventura JL, Vivanco F, Michel JB, Meilhac O, Egido J. Biology of atherosclerotic plaques: what we are learning from proteomic analysis. Cardiovasc Res. 2006 Oct 1;72(1):18-29. Epub 2006 May 24. Review. — View Citation

Duran MC, Mas S, Martin-Ventura JL, Meilhac O, Michel JB, Gallego-Delgado J, Lázaro A, Tuñon J, Egido J, Vivanco F. Proteomic analysis of human vessels: application to atherosclerotic plaques. Proteomics. 2003 Jun;3(6):973-8. — View Citation

Martin-Ventura JL, Duran MC, Blanco-Colio LM, Meilhac O, Leclercq A, Michel JB, Jensen ON, Hernandez-Merida S, Tuñón J, Vivanco F, Egido J. Identification by a differential proteomic approach of heat shock protein 27 as a potential marker of atheroscleros — View Citation

Vivanco F, Martín-Ventura JL, Duran MC, Barderas MG, Blanco-Colio L, Dardé VM, Mas S, Meilhac O, Michel JB, Tuñón J, Egido J. Quest for novel cardiovascular biomarkers by proteomic analysis. J Proteome Res. 2005 Jul-Aug;4(4):1181-91. Review. — View Citation