Assessment of Coronary Plaque Composition

NCT ID: NCT01581632

Last Updated: 2019-03-05

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE1

Total Enrollment

39 participants

Study Classification

INTERVENTIONAL

Study Start Date

2010-01-31

Study Completion Date

2015-05-31

Brief Summary

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The investigators' hypothesis is that local activation of the endogenous Lipoprotein-associated phospholipase A2 (Lp-PLA2) plays an integral role in early atherosclerosis, and contributes to the mechanism of coronary endothelial dysfunction and to the structural and mechanical properties that characterize plaque vulnerability. Thus, this study will characterize prospectively the correlation between the functional and structural vascular wall properties, and the activity of the Lp-PLA2 pathway.

Detailed Description

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The present study will be a substudy of our National Institute of Health (NIH) funded and Institutional Review Board (IRB) approved (08-008161) protocol "Lp-PLA2 and Coronary Atherosclerosis in Humans" and (10-000044) "Lp-PLA2 and Coronary Atherosclerosis in Humans Aim III" in which the investigators are examining the impact of long-term inhibition of Lp-PLA2, with a specific novel inhibitor, on Lp-PLA2 activity and improvement in coronary endothelial function.

The substudy will allow the investigators to also examine the additional endpoint of lipid core content of atherosclerotic plaques and hence plaque vulnerability. Plaque lipid composition will be measured using the LipiScan or LipiScan IVUS catheter (InfraReDx Near Infrared Spectroscopy (NIRS) System with or without intravascular ultrasound (IVUS) capability) at baseline and again at 6 month following Lp-PLA2 inhibition.

The study will provide insight into the role of the endogenous Lp-PLA2 in early coronary atherosclerosis, a potential therapeutic target for early coronary atherosclerosis in humans.

Conditions

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Coronary Atherosclerosis Endothelial Dysfunction Coronary Small Vessel Disease

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

NONE

Study Groups

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LipiScan/LipiScan IVUS

valuation of the coronary artery using near infrared spectroscopy using either a LipiScan catheter or a LipiScan/IVUS catheter following a clinically indicated coronary angiogram and endothelial function testing with a positive diagnosis of endothelial dysfunction. The procedure is repeated following 6 months of Lp-PLA2 inhibition.

Group Type OTHER

LipiScan/LipiScan IVUS

Intervention Type DEVICE

Evaluation of the coronary artery using near infrared spectroscopy using either a LipiScan catheter or a LipiScan/IVUS catheter following a clinically indicated coronary angiogram and endothelial function testing with a positive diagnosis of endothelial dysfunction. The procedure is repeated following 6 months of Lp-PLA2 inhibition.

Interventions

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LipiScan/LipiScan IVUS

Evaluation of the coronary artery using near infrared spectroscopy using either a LipiScan catheter or a LipiScan/IVUS catheter following a clinically indicated coronary angiogram and endothelial function testing with a positive diagnosis of endothelial dysfunction. The procedure is repeated following 6 months of Lp-PLA2 inhibition.

Intervention Type DEVICE

Eligibility Criteria

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Inclusion Criteria

* patients age \> 18 years and \< 85 years
* referred to our cardiac catheterization laboratory for coronary vasomotion testing- subsequently found to have coronary endothelial dysfunction.

Exclusion Criteria

* heart failure ejection fraction \<40%,
* unstable angina
* myocardial infarction or angioplasty within 6 months prior to entry into the study
* use of investigational agents within 1 month of entry into the study
* patients who require treatment with positive inotropic agents other than digoxin during the study
* patients with cerebrovascular accident within 6 months prior to entry the study
* significant endocrine, hepatic or renal, disorders, local or systemic infectious disease within 4 weeks prior to entry into study
* pregnancy or lactation
* mental instability
Minimum Eligible Age

18 Years

Maximum Eligible Age

85 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Mayo Clinic

OTHER

Sponsor Role lead

Responsible Party

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Amir Lerman

Professor of Medicine

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Amir Lerman, MD

Role: PRINCIPAL_INVESTIGATOR

Mayo Clinic

Locations

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Mayo Clinic

Rochester, Minnesota, United States

Site Status

Countries

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United States

Related Links

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Other Identifiers

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09-007004

Identifier Type: -

Identifier Source: org_study_id

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