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The Role of Platelet Surface α2β1 Integrin Expression as a Risk Factor in Thrombotic and/or Bleeding Complications

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ClinicalTrials.gov Identifier: NCT00603148
Recruitment Status : Completed
First Posted : January 28, 2008
Last Update Posted : December 17, 2013
National Heart, Lung, and Blood Institute (NHLBI)
Information provided by (Responsible Party):
Samuel A. Santoro, Vanderbilt University

Brief Summary:
This study will begin to define these critical determinants for patients undergoing procedures in the hybrid interventional cardiology/cardiac surgery suite. In future studies, the data obtained from this study will be used to prospectively stratify patients in terms of bleeding verses thrombotic risk to design studies to optimize anticoagulation and anti-platelet therapies in the hybrid setting.

Condition or disease
Genetic Polymorphism

Detailed Description:

The aim of this study is to test the association of DNA polymorphisms linked to the level of αβ1 integrin expression on platelets with clinical outcome in terms of bleeding or thrombotic complications. The association of polymorphisms in other genes such as GPVI, PAR-1, and COX-2, as well as PLA ½ status, will also be examined and considered in the context of other factors such as medications including IIb/IIIa inhibitors, anticoagulants, type of procedure, obesity smoking status, etc.

Lower levels of platelet surface expression of the α2β1 integrin are associated with an increased risk of bleeding complications following hybrid procedures, especially when the low level of integrin expression is associated with other risk factors that may exacerbate bleeding such as vigorous anti-coagulation, aggressive anti-platelet therapy and other genetic risk factors that contribute to a hemorrhagic phenotype. Conversely, higher level expression of the α2β1 integrin is likely associated with a greater tendency to thrombotic complication that is again modified by other coexisting risk factors.

Study Type : Observational
Estimated Enrollment : 475 participants
Observational Model: Cohort
Time Perspective: Prospective
Official Title: The Role of Platelet Surface α2β1 Integrin Expression as a Risk Factor in Thrombotic and/or Bleeding Complications in Patients Undergoing Invasive Procedures in the Hybrid Cardiac Catheterization/Cardiac Surgery Suite
Study Start Date : September 2006
Primary Completion Date : February 2010
Study Completion Date : February 2010

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Bleeding
U.S. FDA Resources

Primary Outcome Measures :
  1. genetic determination of bleeding verses thrombotic risk factors in patients undergoing cardiovascular procedures

Biospecimen Retention:   Samples With DNA
Whole Blood

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 70 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Probability Sample
Study Population
patients undergoing procedures in a hybrid interventional cardiology/cardiac surgery suite

Inclusion Criteria:

  • Patients will be recruited to the study who are to undergo elective hybrid procedures [percutaneous coronary intervention (PCI) followed by minimally invasive coronary artery bypass graft (CABG) surgery or valve surgery].
  • Both male and females will be enrolled in this study.
  • The age of the population is 18-70 years old.
  • No one ethnic group or gender will be targeted or excluded.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00603148

United States, Tennessee
Vanderbilt University Medical Center
Nashville, Tennessee, United States, 37232
Sponsors and Collaborators
Vanderbilt University
National Heart, Lung, and Blood Institute (NHLBI)
Principal Investigator: Samuel A. Santoro, MD, PhD Vanderbilt University

Responsible Party: Samuel A. Santoro, Professor and Chair, Pathology, Microbiology & Immunology, Vanderbilt University
ClinicalTrials.gov Identifier: NCT00603148     History of Changes
Other Study ID Numbers: 060433
First Posted: January 28, 2008    Key Record Dates
Last Update Posted: December 17, 2013
Last Verified: December 2013

Keywords provided by Samuel A. Santoro, Vanderbilt University:
Genetic Polymorphism
Integrin alpha2beta1