EGO-COMBO Clinical End-point Extension Study Beyond 36 Months

October 7, 2014 updated by: Prof. Stephen Lee, The University of Hong Kong

Evaluation of Endothelial ProGenitor Cell Capture Sirolimus-Eluting Stent by Optical Coherence Tomography: the COMBO Stent 36-months Clinical End-point Extension Study (EGO-COMBO Clinical End-point Extension Study Beyond 36 Months)

In this study, the safety and efficacy of COMBO TM stent beyond 36 months are assessed, in particular the occurrence of late stent thrombosis and late loss catch-up (restenosis).

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

The Genous Stent (the EPC Capture R-stent, OrbusNeich Medical Inc., Fort Lauderdale, FL) is commercially available and has been used extensively in standard coronary intervention in the treatment of more than 200 patients with critical coronary stenoses at Queen Mary Hospital. The COMBO Stent (OrbusNeich Medical Inc., Fort Lauderdale, FL) is an improved version of the Genous Stent and is now widely available for clinical use in all Hong Kong hospitals. To date, more than 300 patients in Queen Mary Hospital have received the COMBO stent as treatment for their coronary artery disease, and all of them remained stable clinically.

The Genous Stent is a bio-engineered 316L stainless steel coronary stent with a biocompatible coating having specific CD34 antibody on the inner surface. CD34 is a surface antigen present on circulating endothelial progenitor cell (EPC). It will be bonded to the CD34 antibody, resulting in capturing of the EPC onto the stent surface and differentiation into endothelial layer. Animal model has demonstrated that a functional endothelial layer could be formed as soon as 24 to 48 hours after Genous stent implantation (1). The HEALING-FIM registry has shown that Genous stent is clinically safe and effective in the treatment of coronary stenosis (2). Recent reports have further confirmed its efficacy in patients with acute coronary syndrome requiring urgent revascularization (3,4).

The COMBO Stent is an improved version of the Genous Stent. The stent delivers a drug called sirolimus to the treated coronary blood vessel. This stent also incorporates a CD34 antibody coating that is designed to promote the healing of the treated coronary artery by catching endothelial progenitor cells from circulating blood as they pass through the stent. These cells are pro-healing and will help the blood vessel wall to heal over the stent more quickly and restore normal tissue function in the stented area. The combination of these two technologies in this new Combo stent is expected to produce even better clinical results, which are published in the REMEDEE Study.

Pre-clinical animal study has already shown the Combo Stent promoted endothelialization and reduced neointima formation, as assessed by both optical coherence tomography (OCT) and histopathology (5). However, such beneficial endothelial coverage as assessed by OCT has never been documented in human subjects, and has been addressed by previous study protocol: the EGO Study (IRB: UW 10-256), EGO-COMBO Pilot Study (UW 10-342) and EGO-COMBO angiographic extension study (UW 12-472). Queen Mary Hospital is currently the single cardiac centre worldwide with such vast experience in using the COMBO stent for percutaneous coronary intervention, together with intracoronary OCT to profile the stent's healing progress and subsequent neo-intimal growth and behaviour.

This current study protocol serves as an extension study to evaluate the long term clinical safety and efficacy of COMBO stent beyond 36 months post-implantation.

This is a single centre observational study to assess the safety and effectiveness clinical endpoints of COMBO TM stent beyond 36 months. Clinical notes for all subjects that previously participated in EGO-COMBO Pilot Study (UW 10-342) will be reviewed for clinical end points according to the definition of Academic Research Consortium and angina symptoms will be classified with Canadian Cardiovascular Society Angina Classification.

Study Type

Observational

Enrollment (Actual)

59

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • China
    • Hong Kong
      • Hong Kong, Hong Kong, China
        • Department of Medicine, Queen Mary Hospital, The University of Hong Kong

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

This is a single centre observational study to assess the safety and effectiveness clinical endpoints of COMBO TM stent beyond 36 months. Clinical notes for all subjects that previously participated in EGO-COMBO Pilot Study (UW 10-342) will be reviewed for clinical end points according to the definition of Academic Research Consortium and angina symptoms will be classified with Canadian Cardiovascular Society Angina Classification.

Description

Inclusion Criteria:

  • Patient previously participated in EGO-COMBO Pilot Study (UW 10-342)

Exclusion Criteria:

  • Patient not previously participated in EGO-COMBO Pilot Study (UW 10-342)

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
EGO-COMBO group
Previously enrolled into EGO-COMBO Pilot study and with combo stent
Other: EGO-COMBO group
Assess the safety and effectiveness of Combo stent

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Composite Major Adverse Cardiac Events (MACE)
Time Frame: beyond 36 months
beyond 36 months

Secondary Outcome Measures

Outcome Measure
Time Frame
All-cause mortality
Time Frame: beyond 36 months
beyond 36 months
Myocardial infarction
Time Frame: beyond 36 months
beyond 36 months
Target Lesion Revascularization
Time Frame: beyond 36 months
beyond 36 months
Angina Class
Time Frame: beyond 36 months
beyond 36 months
Target Vessel Failure
Time Frame: beyond 36 months
beyond 36 months
Cardiac Death
Time Frame: beyond 36 months
beyond 36 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

The University of Hong Kong

Investigators

  • Principal Investigator: Wai Luen Stephen LEE, MD, The Univeristy of Hong Kong

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

September 1, 2014

Primary Completion (Actual)

September 1, 2014

Study Completion (Actual)

September 1, 2014

Study Registration Dates

First Submitted

September 23, 2014

First Submitted That Met QC Criteria

October 7, 2014

First Posted (Estimate)

October 13, 2014

Study Record Updates

Last Update Posted (Estimate)

October 13, 2014

Last Update Submitted That Met QC Criteria

October 7, 2014

Last Verified

October 1, 2014

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • UW 14-456 (IRB HKU)

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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