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Anti-HLA Antibodies Testing on Solid Phase: Comparative Evaluation of Different Kit Vendors Through Luminex Technology.
- Source :
-
Experimental and clinical transplantation : official journal of the Middle East Society for Organ Transplantation [Exp Clin Transplant] 2017 Dec; Vol. 15 (6), pp. 636-640. Date of Electronic Publication: 2017 Jun 05. - Publication Year :
- 2017
-
Abstract
- Objectives: For decades, the detection of anti-HLA antibodies in candidates for solid-organ transplant has been performed with the traditional complement-dependent cytotoxicity method; this assay has been then integrated with the introduction of solid-phase assays. Over the past 20 years, the Luminex assay has become the most widely used in clinical laboratories due to both increased sensitivity and specificity versus enzyme-linked immunosorbent assay. However, even the Luminex technique has shown some critical issues, and choosing the most reliable method still remains challenging. In this study, we verified the concordance of the results obtained in detecting anti-HLA antibodies with 2 kit vendors that provide reagents for the Luminex platform.<br />Materials and Methods: We used 314 serum samples from patients on wait lists for solid-organ transplant. Sera were tested with LABScreen Mixed-LSM12 (One Lambda-Thermo Fisher, Canoga Park, CA, USA) and LIFECODES LifeScreen Deluxe-LMX (Gen-Probe-Immucor, Stanford, CT, USA),which we indicated as vendor A and vendor B, respectively. Anti-HLA class I and class II antibody analyses were conducted by verifying the concordance of the results with Cohen kappa coefficient statistics and confidence interval.<br />Results: The kappa coefficient statistics showed "substantial" reliability for class I (0.61; confidence interval, 0.50-0.73) and "moderate" reliability for class II (0.56; confidence interval, 0.43-0.69). There were no considerable differences in results between the 2 kits regarding overall assignment of negativity or positivity of a sample. Discordant data between positive values for a test and negative for the other were found for samples with weak antibody positivity.<br />Conclusions: Some discordant data were probably attributable to several factors such as the composition of the kits, the antibody titer in the serum, whether sera were diluted, different washing methods, and type of plate used.
- Subjects :
- Adult
Aged
Biomarkers blood
Female
Histocompatibility Testing methods
Humans
Male
Middle Aged
Predictive Value of Tests
Reproducibility of Results
Serologic Tests instrumentation
Solid Phase Extraction instrumentation
Waiting Lists
Young Adult
HLA Antigens immunology
Histocompatibility
Histocompatibility Testing instrumentation
Isoantibodies blood
Organ Transplantation
Reagent Kits, Diagnostic
Subjects
Details
- Language :
- English
- ISSN :
- 2146-8427
- Volume :
- 15
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- Experimental and clinical transplantation : official journal of the Middle East Society for Organ Transplantation
- Publication Type :
- Academic Journal
- Accession number :
- 28585912
- Full Text :
- https://doi.org/10.6002/ect.2016.0199