CYP2C19 Gene Alteration and Thienopyridine Resistance in Percutaneous Coronary Intervention Study (CALDERA-PCI)

September 8, 2014 updated by: Hisao Ogawa, Kumamoto University
Dual antiplatelet therapy with aspirin and thienopyridines decreases the rate of stent thrombosis in patients undergoing percutaneous coronary intervention (PCI). However, despite intensified antiplatelet treatment, some of the patients undergoing PCI develop thrombotic stent occlusion, suggesting incomplete platelet inhibition due to thienopyridine resistance. The present study is designed in order to clarify the influence of CYP2C19 genetic polymorphism on the several biomarkers for platelet activation in Japanese patients treated with thienopyridines undergoing elective PCI.

Study Overview

Status

Completed

Conditions

Detailed Description

We enrolled patients with stable effort angina who received dual-antiplatelet therapy with both aspirin (100mg) and clopidogrel (75mg). We performed PCI 12-24 hours after 300mg loading dose of clopidogrel, or at least 7 days of 75mg clopidogrel treatment after 300mg initial loading dose. We examined platelet adhesiveness, plasma biomarkers for platelet activation such as plasma VWF and ADAMTS13, CD40L, P-Selectin levels, and ADP-induced platelet aggregation using Light transmittance aggregometry (LTA) and VerifyNow P2Y12 assay system in those patients. We also analyzed the CYP2C19 genetic polymorphism to examine the influence of this genetic variation on the several biomarkers for platelet activation.

Study Type

Observational

Enrollment (Actual)

104

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

  • Japan
      • Kumamoto, Japan, 860-8556
        • Kumamoto University Hospital

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

Probability Sample

Study Population

Kumamoto University Hospital, Kumamoto Chuo Hospital and Saisekai Kumamoto Hospital

Description

Inclusion Criteria:

  • The stable effort angina patients
  • More than 20 years old
  • Undergoing elective PCI treated with aspirin and clopidogrel

Exclusion Criteria:

  • Patients treated with the following medical therapy (ie. Warfarin, Steroid, thrombolytic drug, Ticlopidine, Sarpogrelate hydrochloride or Cilostazol)
  • Patients with the following diseases (deep vein thrombosis, atrial fibrillation, collagen disease, infection, liver or renal dysfunction, malignant diseases)

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

  • Observational Models: Case-Control
  • Time Perspectives: Prospective

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Platelet function tests
Time Frame: before, immediately after, 1, 2, and 28 days after elective PCI
Platelet function tests and assays for blood biomarkers of coagulation activation and inflammation before, immediately after, 1, 2, and 28 days after elective PCI.
before, immediately after, 1, 2, and 28 days after elective PCI

Collaborators and Investigators

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

Sponsor

Kumamoto University

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

December 1, 2008

Primary Completion (Actual)

September 1, 2010

Study Completion (Actual)

September 1, 2010

Study Registration Dates

First Submitted

April 3, 2009

First Submitted That Met QC Criteria

April 3, 2009

First Posted (Estimate)

April 6, 2009

Study Record Updates

Last Update Posted (Estimate)

September 10, 2014

Last Update Submitted That Met QC Criteria

September 8, 2014

Last Verified

September 1, 2014

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 0124

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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