Skip to main content

Published scientific study proves efficacy of ImmuKnow® test, improving patient survival rate

11 June 2015

Eurofins Scientific (EUFI.PA), the global leader in bio-analytical testing, and one of the world leaders in genomic services, is pleased to present the results from a recent study published in Transplantation, showing that Viracor-IBT’s ImmuKnow, the FDA-cleared immune cell function assay that detects cell-mediated immunity in immunosuppressed patients, helps improve outcomes in solid organ transplant (SOT) patients. The study demonstrated that the ImmuKnow assay provided additional data which helped optimize immunosuppression, and ultimately improve patient survival rate.

In solid organ transplantation, optimizing a patient’s immunosuppressive therapy is critical in balancing the risk of organ rejection caused by an inadequately suppressed immune system, and the risk of infection, cancer and drug toxicity caused by over-immunosuppression. Results from the study show the ImmuKnow assay provides a useful biomarker which enables optimizing immunosuppression to improve patient outcomes by preventing bacterial and fungal infections, reducing immunosuppressant drug use and improving 1-year patient survival. The use of the ImmuKnow assay in a hospital’s immunosuppression protocol can therefore increase the success rate in organ transplantation.

Specifically, the study showed that the use of the ImmuKnow assay helped (1) increase patient survival by 13% one year post-transplant (2) decrease infections over 2 weeks post-transplant; and (3) lower immunosuppressant drug dosage (tacrolimus). While there have been numerous retrospective and prospective studies over the years demonstrating the ability of ImmuKnow in identifying patients at risk of organ rejection and infection, this is the first interventional, outcomes-based study, which generated much discussion at the American Transplant Congress (ATC) in May 2015.

Comment from Gilles Martin, Eurofins Scientific CEO: “The ImmuKnow assay is just one of the specialized tests with fast turnaround time that Viracor-IBT, part of the Eurofins Scientific Group, offers to aid in the diagnosis and differentiation of SOT complications. The findings of this study, particularly the improvement in 1-year patient survival among transplant patients, are encouraging, and illustrate the positive impact that Eurofins aspires to across the Group. In line with its commitment to contribute positively to health, Eurofins promotes innovation across its laboratory network to develop technologies and analytical methods that take scientific advancements to benefit patients and consumers.”

“Immunosuppression Modifications Based on an Immune Response Assay: Results of a Randomized, Controlled Trial”. Transplantation. March 9, 2015. Summary of findings:

The prospective, randomized, controlled, blinded, interventional study involved 202 adult liver transplant recipients. Patients were divided into two groups; 102 patients received standard immunosuppressive therapy (control group) and 100 patients received adjustments to therapy based on their cell-mediated immune responses determined by the ImmuKnow assay (interventional group). In the interventional group, patients were tested with the ImmuKnow assay before liver transplantation, immediately after surgery and at each clinic visit occurring at approximately day 1, weeks 1 to 4, 6 and 8 and months 3 to 6, 9 and 12. The assay was repeated within 7 days of a suspected or confirmed rejection or infection, and again within one week after resolution of the event.

Based on immune function values, tacrolimus doses were reduced 25% when values were less than 130 (low immune cell response) and increased 25% when values were greater than 450 (strong immune cell response). This means that physicians are able to adjust the amount of the immunosuppressant drug, tacrolimus, to a more optimal, patient-specific level, helping maintain the critical balance between reducing organ rejection and patient infections. The study concludes that ImmuKnow provides a useful biomarker which enables optimizing immunosuppression to improve patient outcomes by preventing bacterial and fungal infections, reducing immunosuppressant drug use and improving 1-year patient survival.

ImmuKnow® is FDA cleared for the following intended use: Detection of cell-mediated immune response in populations undergoing immunosuppressive therapy for organ transplant.

For more information please visit or contact:


Jenni Miller, Corporate Communications

Phone: +1 800 305 5198


Eurofins Scientific

Investor Relations

Phone:  +32 2 766 1620


Notes for the editor:

Eurofins – a global leader in bio-analysis

Eurofins Scientific is the world leader in food and pharmaceutical products testing. It is also number one in the world in the field of environmental laboratory services and one of the global market leaders in agroscience, genomics, discovery pharmacology and central laboratory services.

With over 17,000 staff in more than 200 laboratories across 36 countries, Eurofins offers a portfolio of over 130,000 reliable analytical methods for evaluating the safety, identity, composition, authenticity, origin and purity of biological substances and products. The Group provides its customers with high-quality services, accurate results in time and expert advice by its highly qualified staff.

Eurofins is committed to pursuing its dynamic growth strategy by expanding both its technology portfolio and its geographic reach. Through R&D and acquisitions, the Group draws on the latest developments in the field of biotechnology and analytical chemistry to offer its clients unique analytical solutions and the most comprehensive range of testing methods.

As one of the most innovative and quality oriented international players in its industry, Eurofins is ideally positioned to support its clients’ increasingly stringent quality and safety standards and the expanding demands of regulatory authorities around the world.

The shares of Eurofins Scientific are listed on the Euronext Paris Stock Exchange (ISIN FR0000038259, Reuters EUFI.PA, Bloomberg ERF FP).

Important disclaimer:

This press release contains forward-looking statements and estimates that involve risks and uncertainties. The forward-looking statements and estimates contained herein represent the judgement of Eurofins Scientific’ management as of the date of this release. These forward-looking statements are not guarantees for future performance, and the forward-looking events discussed in this release may not occur. Eurofins Scientific disclaims any intent or obligation to update any of these forward-looking statements and estimates. All statements and estimates are made based on the data available to the Company as of the date of publication, but no guarantee can be made as to their validity.

Ravaioli M, Neri F, et al. Immunosuppression Modifications Based on an Immune Response Assay: Results of a Randomized,   Controlled Trial. Transplantation. Epub* March 9, 2015.

The official Journal of The Transplantation Society, published monthly.

Refer to Summary of the findings of the study on p.2 of this press release

Back to top