Correlation of Luminex-Based Single Antigen Based Results With Complement-Dependent Cytotoxicity Crossmatch and Flow Cytometry Crossmatch Results: A Single-Center Experience From Istanbul.

Oguz S. R., Sinangil A., Barlas S., Ciftci H. S., Ulusoy E., İzgi D., ...More

TRANSPLANTATION PROCEEDINGS, vol.55, no.1, pp.303-308, 2023 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 55 Issue: 1
  • Publication Date: 2023
  • Doi Number: 10.1016/j.transproceed.2023.02.005
  • Journal Name: TRANSPLANTATION PROCEEDINGS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, BIOSIS, CAB Abstracts, EMBASE, MEDLINE, Veterinary Science Database
  • Page Numbers: pp.303-308
  • Istanbul University Affiliated: Yes

Abstract

ABSTRACT

Background

This study aimed to retrospectively investigate the correlation of mean Class I donor-specific antibody (DSA) intensity values detected in Luminex-based techniques with the results of complement-dependent cytotoxicity crossmatch (CDC-XM) and flow cytometry crossmatch (FC-XM) results.

Methods

A total of 335 patients with kidney failure and their living donors whose CDC-XM, FC-XM, and single antigen based (SAB) tests were studied between 2018 and 2020 for transplant preparation from living donor candidates were included in the study. Patients were divided into 4 groups according to their mean fluorescence intensity (MFI) values of SAB assay.

Results

Anti-HLA antibodies (class I and/or class II) were detected using SAB in 91.6% patients included in the study (MFI >1000). Class I DSA was positive in 34.8% of patients with anti-HLA antibodies. When CDC-XM and FC-XM results were evaluated in the 4 groups separated according to MFI values, 3 patients with DSA MFI <1000 had negative CDC-XM and T-B-FC-XM results. Of 32 patients with DSA-MFI between 1000 and 3000, 93.75% (n = 30) had T-B-FC-XM or CDC-XM-negative results, and 6.25% (n = 2) had B-FC-XM-positive results. The CDC-XM, T, and B-FC-XM were negative in all 17 patients with DSA-MFI between 3000 and 5000. Our results showed that MFI >5834 DSA values were significantly correlated with positive T-FC-XM (P < .001), and MFI >6016 values were significantly correlated with positive CDC-XM (P = .002). In addition, MFI values >5000 were associated with both CDC-XM and FC-XM in our study.

Conclusions

The MFI values >5000 correlated with both CDC-XM and FC-XM.