Cardiovascular disease remains the most pressing healthcare issue for developed countries and is becoming so for developing countries. There are a number of chronic therapies available for long-term management of risk. Short term therapies for subjects with an acute event, such as an episode of acute coronary syndrome (ACS), are focused on reperfusion and removing thrombus but most subsequent events are caused by atherosclerotic plaque rupture at a different site. There are no approved therapies that can rapidly reduce the burden of unstable, inflamed plaque in the overall coronary vascular bed. HDL has multiple actions that could lead to atherosclerotic plaque stabilization, such as rapid removal of large quantities of cholesterol from the vasculature, improvement in endothelial function, protection against oxidative damage and reduction in inflammation. This study will assess the effects of CER-001, an ApoA-I-based HDL mimetic, on indices of atherosclerotic plaque progression and regression as assessed by intravascular ultrasound (IVUS) measurements in patients with (ACS).

Inclusion Criteria:

• Male or female less than 75 years of age
• Acute coronary syndrome (acute chest pain and a diagnosis of ST segment elevation myocardial infarction, non-ST elevation myocardial infarction or unstable angina)
• Angiographic evidence of coronary artery disease with suitable "target" coronary artery for IVUS evaluation

Exclusion Criteria:

• Females of child-bearing potential
• Weight >120 kg
• Angiographic evidence of >50% stenosis of the left main artery
• Uncontrolled diabetes (HbA1C>10%)
• Hypertriglyceridemia (>500 mg/dL)
• Congestive heart failure (NYHA class III or IV)
• Ejection fraction <35%
• Uncontrolled hypertension (SBP >180 mm Hg)
• Known major hematologic, renal, hepatic, metabolic, gastrointestinal or endocrine dysfunction