| Title | Use of a FLAER-based WBC assay in the primary screening of PNH clones. | | Author(s) | Sutherland DR, Kuek N, Azcona-Olivera J, Anderson T, Acton E, Barth D, Keeney M | | Institution | Laboratory Medicine Program, Toronto General Hospital 11E-416, Toronto, Ontario M5G 2C4, Canada. | | Source | Am J Clin Pathol 2009 Oct; 132(4):564-72. | | MeSH | Anemia, Aplastic
Antigens, CD59
Bacterial Toxins
Clone Cells
Erythrocyte Count
Flow Cytometry
Fluorescein-5-isothiocyanate
Hemoglobinuria, Paroxysmal
Humans
Leukocyte Count
Myelodysplastic Syndromes
Pore Forming Cytotoxic Proteins
Sensitivity and Specificity
| | Abstract | Diagnosis of paroxysmal nocturnal hemoglobinuria (PNH) with flow cytometry traditionally involves the analysis of CD55 and CD59 on RBCs and neutrophils. However, the ability to accurately detect PNH RBCs is compromised by prior hemolysis and/or transfused RBCs. Patients with aplastic anemia (AA) and myelodysplastic syndrome (MDS) can also produce PNH clones. We recently described a multiparameter fluorescent aerolysin (FLAER)-based flow assay using CD45, CD33, and CD14 that accurately identified PNH monocyte and neutrophil clones in PNH, AA, and MDS. Here, we compared the efficiency of this WBC assay with a CD59-based assay on RBCs during a 3-year period. PNH clones were detected with the FLAER assay in 63 (11.8%) of 536 samples tested, whereas PNH RBCs were detected in only 33 (6.2%), and always with a smaller clone size. The FLAER assay on WBCs is a more sensitive and robust primary screening assay for detecting PNH clones in clinical samples. | | Language | eng | | Pub Type(s) | Comparative Study
Journal Article
| | PubMed ID | 19762534 |
|
