Abstract:
:Reduction in minimal residual disease, measured by real-time quantitative PCR or flow cytometry, predicts prognosis in childhood B-cell precursor acute lymphoblastic leukemia. We explored whether cells reported as minimal residual disease by flow cytometry represent the malignant clone harboring clone-specific genomic markers (53 follow-up bone marrow samples from 28 children with B-cell precursor acute lymphoblastic leukemia). Cell populations (presumed leukemic and non-leukemic) were flow-sorted during standard flow cytometry-based minimal residual disease monitoring and explored by PCR and/or fluorescence in situ hybridization. We found good concordance between flow cytometry and genomic analyses in the individual flow-sorted leukemic (93% true positive) and normal (93% true negative) cell populations. Four cases with discrepant results had plausible explanations (e.g. partly informative immunophenotype and antigen modulation) that highlight important methodological pitfalls. These findings demonstrate that with sufficient experience, flow cytometry is reliable for minimal residual disease monitoring in B-cell precursor acute lymphoblastic leukemia, although rare cases require supplementary PCR-based monitoring.
journal_name
Haematologicajournal_title
Haematologicaauthors
Øbro NF,Ryder LP,Madsen HO,Andersen MK,Lausen B,Hasle H,Schmiegelow K,Marquart HVdoi
10.3324/haematol.2011.051383subject
Has Abstractpub_date
2012-01-01 00:00:00pages
137-41issue
1eissn
0390-6078issn
1592-8721pii
haematol.2011.051383journal_volume
97pub_type
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