T-SPOT.CMV and T-SPOT.PRT Diagnostic Assays

Study Overview
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Brief Summary
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The T-SPOT assay quantifies the number of peripheral blood interferon-γ producing effector T cells [spot forming cells/million peripheral blood mononuclear cells - PBMC)]. The T-SPOT platform technology can be applied to diagnose and monitor any major disease process driven by a T cell response, including a viral disease such as cytomegalovirus (CMV) infection (the T-SPOT.CMV assay) or an allograft rejection (the T-SPOT.PRT assay).

Detailed Description
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Approximately 600 subjects who meet inclusion/exclusion criteria will be enrolled in the prospective, non-randomized, observational study. Sample size is based on having an adequate overall number of subjects to assess the T-SPOT.PRT endpoint (350) and the T-SPOT.CMV endpoint (250) in the defined populations. Subjects may be enrolled from pre-transplantation to post-transplantation up to completion of antiviral prophylaxis. Study duration: 37 months; 25 months to enroll all subjects with 12 months (365 days) of patient participation. Study population: All subjects enrolled in this study will be men or women, aged 18 years or older and recipients of a first or subsequent renal transplant.

Official Title
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A Prospective Observational Trial to Evaluate the Correlation of T-SPOT® Response to CMV Infection and T Cell-mediated Acute Graft Rejection

Conditions
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Infection in Solid Organ Transplant Recipients

Participation Criteria
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Eligibility Criteria
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Inclusion criteria: Active candidate or recipient of a kidney transplant. Patients enrolled post-transplant must be within 6 months of transplantation and on active CMV anti-viral prophylaxis. Age ≥ 18 years. CMV serology of donor and recipient confirmed prior to enrollment. For seronegative subjects (R-), CMV serostatus should be confirmed within eight weeks prior to transplant by the site local laboratory. Able to provide T-SPOT pre-transplant samples up to a maximum of one month prior to transplant (in the interval between Day -30 and Day 0), or at the time of enrollment if this occurs following transplantation. IRB approved written Informed Consent and privacy language per national regulation (e.g., Health Insurance Portability and Accountability Act for US sites) must be obtained from the subject or legally authorized representative prior to any study related procedures, including screening evaluations and tests. Exclusion criteria: Anemia prior to transplant that indicates not a candidate for blood draw. On active immunosuppression within two months prior to transplant. Multi-organ transplant (dual-kidney allocation is allowed). Subject has received prior exposure to a CMV vaccine. Subject has undergone or is planning to undergo plasmapheresis. Subject requires desensitization for ABO blood type incompatibility or a positive T or B-cell crossmatch. Subject is known to be HIV positive. Subject is known to have a clinically significant medical or psychiatric condition considered a high risk for participation in an investigational study.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 75 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Assessment of anti-CMV cell-mediated immunity using the change in T-SPOT counts |  | Change in T-SPOT counts from baseline to 365 days post transplant. | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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CMV