Exploring blast composition in myelodysplastic syndromes and myelodysplastic/myeloproliferative neoplasms: CD45RA and CD371 improve diagnostic value of flow cytometry through assessment of myeloblast heterogeneity and stem cell aberrancy.
Cytometry B Clin Cytom
; 100(5): 574-589, 2021 09.
Article
em En
| MEDLINE
| ID: mdl-33369070
ABSTRACT
BACKGROUND:
Flow cytometry immunophenotyping (FCIP) can improve diagnosis of myelodysplastic syndromes (MDS) and myelodysplastic/myeloproliferative neoplasms (MDS/MPN), although its application is challenging due to difficulties in standardization, complexity of antibody panels and subjective interpretation of data. Since blasts are invariably affected in these disorders, we developed a FCIP approach for detailed and objective analysis of the blast population.METHODS:
FCIP using a one-tube 10-color (13-marker) antibody panel was performed on bone marrow samples from 23 MDS and 8 MDS/MPN patients, 21 cytopenic patients non-diagnostic for MDS (Non-MDS), and 16 Control samples.RESULTS:
MDS and MDS/MPN cases demonstrated one to several immunophenotypic abnormalities including increased myeloblasts, decreased stage-1 hematogones, aberrant stem cells, abnormal myeloblast heterogeneity/divergence from normal, increased or decreased CD45 intensity, increased CD117 or CD123 intensity, decreased CD38 intensity, and aberrant expression of lineage markers (CD5, CD19, CD56). A Blast score was developed that showed sensitivity of 80.6% and specificity of 90.5% for immunophenotypic diagnosis of MDS and MDS/MPN. Expression levels of CD45RA and CD371 were used to evaluate abnormal myeloblast heterogeneity and stem cell aberrancy. Both these features were, for the first time, incorporated into a scoring system and resulted in 19% increase in the sensitivity of the assay for lower-risk MDS.CONCLUSION:
Deep immunophenotypic analysis of the blast population is valuable for diagnosis of MDS and MDS/MPN and can potentially provide sensitivity and specificity figures comparable to those previously described using more comprehensive panels that assess maturing myelomonocytic and erythroid elements in addition to progenitor cells.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Células-Tronco
/
Síndromes Mielodisplásicas
/
Receptores Mitogênicos
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Antígenos Comuns de Leucócito
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Lectinas Tipo C
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Células Precursoras de Granulócitos
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Doenças Mieloproliferativas-Mielodisplásicas
/
Citometria de Fluxo
Tipo de estudo:
Diagnostic_studies
Limite:
Aged
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Aged80
/
Female
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Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Cytometry B Clin Cytom
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
Canadá