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Updated: Aug 13, 2026
Development of a Quantitative Recombinase Polymerase Amplification Assay with an Internal Positive Control
Published on: March 30, 2015
A rapid test to monitor alloreactive responses in whole blood using real-time polymerase chain reaction
Ling Zhou1, Michel Toungouz, Vincent Donckier
1Department of Immunology-Hematology-Transfusion, Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium.
Insights
A new assay quickly monitors immune responses after transplants. This method uses real-time PCR to measure cytokine mRNA in whole blood, aiding tailored immunosuppression and patient monitoring.
Area of Science:
- Immunology
- Transplantation Science
- Molecular Diagnostics
Background:
- Monitoring allogeneic immune responses is crucial for safe immunosuppression protocols in transplantation.
- Existing methods can be time-consuming or require large sample volumes.
- Tailored immunosuppression strategies necessitate rapid and reliable monitoring tools.
Purpose of the Study:
- To develop and validate a rapid, whole-blood assay for monitoring allogeneic immune responses.
- To quantify key immune mediator mRNA (interleukin-2 and interferon-gamma) in response to allogeneic stimulation.
- To assess the utility of this assay in a clinical transplantation setting.
Main Methods:
- A real-time polymerase chain reaction (PCR) assay was developed.
- Whole blood was stimulated with allogeneic T cell-depleted peripheral blood mononuclear cells.
- Interleukin-2 (IL-2) and interferon-gamma (IFN-γ) mRNA levels were quantified.
- The assay requires small blood volumes and provides results within 48 hours.
Main Results:
- The assay demonstrated rapid quantification of IL-2 and IFN-γ mRNA.
- Successful application in monitoring a liver transplant patient on a tolerance induction protocol.
- The assay showed potential for assessing immune status post-transplant.
Conclusions:
- This rapid whole-blood mixed lymphocyte reaction (MLR) assay offers a valuable tool for monitoring transplant patients.
- It facilitates the development of tailored immunosuppression protocols.
- The assay's speed and simplicity support its clinical utility in solid organ and hematopoietic stem cell transplantation.
Abstract:
Rapid, simple, and reliable assays to monitor allogeneic responses are essential for the safe development of novel protocols of tailored immunosuppression. Herein, we describe a real-time polymerase chain reaction method based on interleukin-2 and interferon-gamma mRNA quantification upon stimulation of whole blood with allogeneic T cell-depleted peripheral blood mononuclear cells. The technique requires only small blood volumes and results can be obtained within 48 hours. Data obtained in a liver transplant patient receiving a tolerance induction protocol based on the infusion of donor-type hematopoietic stem cells suggest that this rapid whole blood mixed lymphocyte reaction assay could be valuable for the monitoring of patients undergoing solid organ or hematopoietic stem cell transplantation.
