Validation of a Novel Diagnostic Tool for the Evaluation of Post Renal Transplant Immunosuppression: The ImmuKnow Assay
Patients undergoing renal transplantation at London Health Sciences Centre, University Hospital and who are participating in the study "A Comparison of Effects of Standard Dose vs Low Dose Advagraf with IL-2 Receptor Antibody Induction, MMF and Steroids, With or Without ACEi/ARB-based Antihypertensive Therapy on Renal Allograft Histology, Function, and Immune Response" will be evaluated with the ImmuKnow Assay to assess the ability of this assay to predict underimmunosuppression (rejection) or overimmunosuppression determined by this test and to determine retrospectively whether decision making utilizing this novel assay would have improved outcomes over standard techniques.
This study is designed to evaluate an in vitro assay (Cylex®ImmuKnow Assay) for the measurement of cell-mediated immune response in renal transplant patients receiving immunosuppressive therapy. This assay measures ATP as an activation response of CD4+ cells to stimulation with phytohemagglutinin (PHA) in whole blood samples as a reflection of the immune system of the patient at any point in therapy. The natural history of the immune status of the renal transplant recipient as reflected by the ImmuKnow assay will be determined at specific time points of interest including: pre and post transplant, as an adjunct to therapeutic drug monitoring, and pre and post infectious or rejection episode. Analysis of the results of the assay at these time points will allow us to retrospectively study the effects of routine immunosuppressive agent modulation on immune function, and its subsequent effects in times of renal allograft insult.
|Study Design:||Observational Model: Case-Only
Time Perspective: Prospective
|Official Title:||Validation of a Novel Diagnostic Tool for the Evaluation of Post Renal Transplant Immunosuppression: The ImmuKnow Assay|
- Immune status [ Time Frame: A sample will be collected pre-transplant as well as for an expected average of 6 months post-transplant. ]
Biospecimen Retention: None Retained
|Study Start Date:||May 2010|
|Study Completion Date:||December 2013|
|Primary Completion Date:||December 2013 (Final data collection date for primary outcome measure)|
All participants enrolled in this study will have been previously consented to the study entitled, "A Comparison of Effects of Standard Dose vs Low Dose Advagraf with Il-2 Receptor Antibody Induction, MMF and Steroids, With or Without ACEi/ARB-based Antihypertensive Therapy on Renal Allograft Histology, Function, and Immune Response." This is an observational study with only one group/cohort in which all participants have bloodwork collected pre-transplant and at various time points post-transplant and these samples are analyzed using the Cylex ImmuKnow Assay.
Other: Cylex ImmuKnow Assay
This is not an interventional study. However the assay being tested on the samples of all enrolled participants in the Cylex ImmuKnow Assay
Please refer to this study by its ClinicalTrials.gov identifier: NCT01859832
|London Health Sciences Centre, University Hospital|
|London, Ontario, Canada, N6A 5A5|
|Principal Investigator:||Patrick Luke, MD, FRCSC||Lawson Health Research Institute|