Article ; Online: Evaluation of the fully automated LIAISON®XL chemiluminescence analyzer for QuantiFERON®-CMV testing in transplant recipients.
2023 Volume 166, Page(s) 105550
Abstract: ... Pearson's r=0.978, QF-Mg Pearson's r=0.963). No significant difference was observed in median QF-CMV values ...
| Abstract | Background: Monitoring CMV-specific cell-mediated immunity by the QuantiFERON®-CMV (QF-CMV) may be useful in predicting the risk of CMV infection in transplant recipients (TR). Objectives: As the QuantiFERON-Tuberculosis (QFT®-Plus) became available on the fully automated LIAISON®XL chemiluminescence (CLIA) analyzer, we evaluated the performance of the QF-CMV on the LIAISON®XL analyzer using the QuantiFERON®-TB Gold Plus reagent. Study design: Between 2018 and 2022, 81 samples from TR were collected at the Department of Virology of Limoges Hospital, France. Whole blood was collected into each of the three QF-CMV collection tubes: a CMV-antigen tube (QF-Ag), a mitogen tube (QF-Mg) (positive control), and a nil tube (negative control). The QF-CMV was performed on the LIAISON®XL analyzer, and results were compared with those obtained by conventional microplate ELISA. Results: Intra- and inter-assay coefficients of variation were inferior to 20%. No inter-sample contamination was found (p=0.366). The level of concordance between CLIA and the commonly used ELISA method was 88.9%. Positive and negative percent agreements were 92.3% and 85.7%, respectively, with a very good agreement between assays (κ=0.818). Most discordances were due to indeterminate- or negative-ELISA/positive-CLIA results (most of ELISA results were borderline). Linear regression analyses demonstrated a strong correlation between both assays (QF-Ag Pearson's r=0.978, QF-Mg Pearson's r=0.963). No significant difference was observed in median QF-CMV values between both assays (QF-Ag p=0.776; QF-Mg p=0.853; Mann-Whitney U test). The Bland-Altman plots showed a minor difference in IFN-γ release (QF-Ag -0.069 IU/ml, 95% limits of agreement (LoA): -1.589; 1.451; QF-Mg 0.190 IU/ml, 95% LoA: -2.070; 2.450). Conclusion: Automated QF-CMV with CLIA is comparable to QF-CMV performed by ELISA with a presumably higher sensitivity for IFN-γ detection that may result in the conversion of samples close to the ELISA cut-off into positive results. Moreover, the use of a random-access analyzer allows to optimize the follow-up of TR. |
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| MeSH term(s) | Humans ; Transplant Recipients ; Luminescence ; Tuberculosis/diagnosis ; Interferon-gamma ; Cytomegalovirus Infections ; Interferon-gamma Release Tests/methods |
| Chemical Substances | Interferon-gamma (82115-62-6) |
| Language | English |
| Publishing date | 2023-07-20 |
| Publishing country | Netherlands |
| Document type | Journal Article |
| ZDB-ID | 1446080-4 |
| ISSN | 1873-5967 ; 1386-6532 |
| ISSN (online) | 1873-5967 |
| ISSN | 1386-6532 |
| DOI | 10.1016/j.jcv.2023.105550 |
| Database | MEDical Literature Analysis and Retrieval System OnLINE |
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