BACKGROUND: CD157 has been recently reported as a useful glycosylphosphatidylinositol (GPI)-linked marker for the detection of paroxysmal nocturnal hemoglobinuria (PNH) clones in patients with suspected paroxysmal nocturnal hemoglobinuria by flow cytometry as it targets both neutrophils and monocytes. The aim of this study is to test the feasibility of a non-fluorescent aerolysin (FLAER) approach and propose an alternative for laboratories, where FLAER is not available. METHODS: We validated a non-FLAER-based single-tube, 6-color assay targeting the GPI-linked structures CD157, CD24, and CD14. We determined its performance characteristics on 20 PNH patient samples containing a variety of clone sizes and compared results with a previously validated FLAER-based approach. RESULTS: Coefficient of variation (CV) for intra-/interassay precision analyses ranged from 0.1%/0.2% to 3.02%/7.58% for neutrophils and from 0.10%/0.3% to 5.39%/6.36% for monocytes. Coefficient of determination (r2 ) for linear regression analysis of PNH clones from 20 patients ranging from 0.06% to 99.7% was 0.99 in all cases, Wilcoxon ranks test showed no statistically significant differences (P > 0.05), Bland-Altman analysis demonstrated performance agreement with mean bias ranging from 0.06 to 0.2. CONCLUSION: Our results confirm very good performance characteristics for both intra- and interassay precision analyses, favorable correlation, and agreement between the FLAER and non-FLAER-based approaches, using the CD157 GPI marker. Our experience suggests that a rapid and cost-effective simultaneous evaluation of PNH neutrophils and monocytes by flow cytometry without using FLAER is possible in areas where FLAER may not be widely available. © 2016 International Clinical Cytometry Society.

• MeSH
• ADP-ribosylcyklasa imunologie   metabolismus   MeSH
• antigen CD24 imunologie   metabolismus   MeSH
• bakteriální toxiny MeSH
• biologické markery metabolismus   MeSH
• CD antigeny imunologie   metabolismus   MeSH
• cytotoxické proteiny tvořící póry MeSH
• GPI-vázané proteiny imunologie   metabolismus   MeSH
• lidé MeSH
• lipopolysacharidové receptory imunologie   metabolismus   MeSH
• monocyty imunologie   metabolismus   MeSH
• neutrofily imunologie   metabolismus   MeSH
• paroxysmální hemoglobinurie imunologie   metabolismus   MeSH
• průtoková cytometrie metody   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH