Role of Intraoperative Thymoglobulin in Decreasing Ischemia-Reperfusion Injury in Pediatric Heart Transplant Recipients
The restoration of normal blood flow following a period of ischemia may result in ischemia / reperfusion injury (I/RI), which is characterized by inflammation and oxidative damage to tissues. Varying degrees of I/RI occur upon reperfusion of a donor heart after cold storage. Medications containing antibodies against immune cells have been used for many years as powerful immunosuppressants. These medications, called polyclonal antibody preparations, are generally only used immediately following transplantation and/or to treat rejection. At our institution, one such antibody preparation (Thymoglobulin) is used in most pediatric heart transplant recipients for 3-5 days immediately after transplantation. Because standard immunosuppressive medications (called calcineurin inhibitors) are toxic to the kidneys, the use of Thymoglobulin allows us to delay the initiation of calcineurin inhibitors until the kidneys of completely recovered from the shock of the transplant surgery.
We hypothesize that Thymoglobulin may be beneficial in reducing the damage caused by I/RI. Thus, the present study seeks to evaluate the effectiveness of an intra-operative dose of Thymoglobulin (in addition to the standard doses post-operatively) at reducing the effects of I/RI. The study will be a double-bind placebo-controlled trial involving 20 subjects. Biologic markers for I/RI will be assessed at periodic intervals for six months post-transplantation. Subjects receiving intra-operative doses of Thymoglobulin will be compared to the controls in order to assess the effectiveness of intra-operative Thymoglobulin in ameliorating the effects of I/RI.
|Ischemia Reperfusion Injury Heart Transplantation||Drug: Anti-Thymocyte Globulin Drug: Normal Saline|
|Study Design:||Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Prevention
|Official Title:||Role of Intraoperative Thymoglobulin in Decreasing Ischemia-Reperfusion Injury in Pediatric Heart Transplant Recipients|
|Study Start Date:||July 2008|
|Estimated Primary Completion Date:||May 2009 (Final data collection date for primary outcome measure)|
|Placebo Comparator: 1||
Drug: Normal Saline
Normal saline will be utilized as a placebo comparator. It will be infused in the same fashion as the Thymoglobulin in the intervention arm.
|Active Comparator: 2||
Drug: Anti-Thymocyte Globulin
Thymoglobulin (1.5 mg/kg body weight) will be infused through a peripheral intravenous line over a minimum of 6 hours. The infusion will be started at the time of donor visualization (once it is confirmed the transplant is proceeding). The peri-operative nurse or anesthesiologist will be responsible for drug infusion.
Other Name: ATG
Please refer to this study by its ClinicalTrials.gov identifier: NCT00709293
|United States, California|
|Mattel Children's Hospital at UCLA|
|Los Angeles, California, United States, 90095|
|Principal Investigator:||Juan C Alejos, MD||Department of Pediatrics, University of California Los Angeles|