68 Ga-NODAGA-E[c(RGDγK)]2: Positron Emission Tomography Tracer for Imaging of Myocardial Angiogenesis

Study Overview
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Brief Summary
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The aim is to examine the expression of αvβ3 integrin using a novel selective radiotracer in patients with myocardial infarction and investigate if it is a suitable tool for predicting myocardial recovery and thus prognosis.

Detailed Description
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Ischemic heart disease is worldwide the single most frequent cause of death. The number of patients surviving acute myocardial injury is increasing due to improved acute treatment. However, after the initial repair, the tissue undergoes a remodeling phase to compensate for the damaged area. This re-modeling phase can change the structure end geometry of the heart resulting in lower ejection fraction, leading to cardiac dysfunction, which eventually leads to heart failure. Understanding and ideally modifying the reparative mechanisms following myocardial infarction is increasingly important and may lead to improved outcome. If the heart suffers from ischemia following an acute coronary event, the tissue reacts strongly to the hypoxia. The body will as a compensatory mechanism create new vessel to provide the tissue with oxygen. This is known as the biological process of angiogenesis. This complex process involves different angiogenic and pro-fibrotic transcription factors that initiate the restoration of capillaries by sprouting from the existing endothelial cells in response to hypoxia. Time seem essential to protect and save the myocardium. An early onset of cytokines and growth factors is associated with a decline in cardiomyocytes apoptosis, smaller infarct areas, and decreased ventricular dilation. Therefore, an early induction of angiogenesis seems important for a good prognosis of the patient. Integrin αvβ3 is a transmembrane cell surface receptor that is markedly upregulated in states of angiogenesis. It facilitates migration and proliferation and thereby allowing cells to respond to extracellular environment. Integrin αvβ3 is thus a key player in the angiogenic process. The integrin αvβ3 has a binding site for an RGD peptide (Arg-Gly-Asp motif) and this can be targeted by PET tracers. RGD-based PET tracers have been shown to accumulate at the site of myocardial necrosis in both human and animal studies. The uptake seems to peak a few weeks after the infarction and may correlate to recovery of cardiac function and thus serve as a prognostic marker.

Official Title
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68Ga-NODAGA-E[c(RGDγK)]2: a Novel Positron Emission Tomography (PET) Tracer for in Vivo Molecular Imaging of Myocardial Angiogenesis Following Myocardial Infarction

Conditions
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Acute Myocardial Infarction

Intervention / Treatment
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* Drug: 68Ga-NODAGA-E[c(RGDyK)]2


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Age over 50 years Acute myocardial infarction Group: Verified first-time acute myocardial infarction treated with PCI Control Group: Previous healthy No known cardiac disease Exclusion Criteria: No prior history of acute coronary infarction No prior history of Heart surgery Not treated with anti-angiogenic medicine Subject with pacemaker, cochlear implant or insulin pump Pregnancy Lactation Severe claustrophobia Severe obesity (weight above 140kg) If a subject is in the fertile age, a pregnancy test will be use prior to injection to the PET_tracer If a subject is having a severe allergic reaction to the PET-tracer, the person will be excluded for the rest of the trial If the PET-tracer is administered subcutaneous, the person will be excluded for the rest of the trial¨ Tupe I or II diabetes

Ages Eligible for Study
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Minimum Age: 50 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: Prevention
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Acute myocardial infarctions group<br>200 MBq 68Ga-NODAGA-E[c(RGDyK)]2 administered IV. three times. 1-3 days after intervention, 7-10 days after intervention and 30-35 days after intervention. | Drug: 68Ga-NODAGA-E[c(RGDyK)]2<br>* 200 MBq 68Ga-NODAGA-E[c(RGDyK)]2 administered IV.<br>* Other names: RGD-PET;|
| Active Comparator: Control group<br>200 MBq 68Ga-NODAGA-E[c(RGDyK)]2 administered IV. one time. | Drug: 68Ga-NODAGA-E[c(RGDyK)]2<br>* 200 MBq 68Ga-NODAGA-E[c(RGDyK)]2 administered IV.<br>* Other names: RGD-PET;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| To evaluate myocardial angiogenesis | Analysing uptake of 68Ga-NODAGA-E[c(RGDyK)]2 Positron Emission Tomography in myocardial infarction after PCI | 30-35 days | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Uptake of 68Ga-NODAGA-E[c(RGDyK)]2 and myocardial perfusion | Quantitative uptake of 68Ga-NODAGA-E[c(RGDyK)]2 and change in myocardial perfusion after PCI using Rubidium 82 Positron Emission Tomography after Percutaneous coronary intervention(PCI) | 30-35 days | 
| Uptake of 68Ga-NODAGA-E[c(RGDyK)]2 and functional recovery | Quantitative uptake of 68Ga-NODAGA-E[c(RGDyK)]2 and functional recovery using Magnetic Resonance after PCI | 30-35 days | 
| Uptake of 68Ga-NODAGA-E[c(RGDyK)]2 and viability | Quantitative uptake of 68Ga-NODAGA-E[c(RGDyK)]2 and viability using Flour-Deoxy-Glucose Positron Emission Tomography after PCI | 30-35 days | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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positron emission tomography, nuclear medicine, prognosis