title: Comprehensive flow cytometry phenotype in acute leukemia at diagnosis and at relapse.
abstract: Multiparameter flow cytometry (MFC) plays a vital role in the detection of minimal residual disease (MRD) and diagnosis of relapse in acute leukemia. However, application of a limited panel of antibodies in MFC leads to high rates of false-negative and false-positive results. Thirteen patients with acute lymphoblastic leukemia (ALL) and 12 patients with acute myeloid leukemia (AML) were immunophenotyped by MFC at diagnosis and at relapse using a comprehensive panel of monoclonal antibodies (McAbs) to 27 antigens and CD45/SSC gating. In 23 of 25 patients (92.3%), changes in at least one of progenitor-associated, myeloid and lymphoid antigens between diagnosis and relapse were observed. Antigen changes were observed in 92 of 239 antigens (38.5%) expressed in 25 patients, in 49 of 117 antigens (41.9%) expressed in 13 ALL patients, and in 43 of 122 antigens (35.2%) expressed in 12 AML patients. Phenotypic changes were characterized by the expression of cross-lineage antigens. The intralineage change was observed in the majority of patients. However, myeloid lineage shift was identified by MFC in two patients with T-ALL. Multiple panels of three or more McAbs are likely to be required in the monitoring of MRD and diagnosis of relapse in acute leukemia by MFC.
authors.affiliation: Center for Stem Cell Research and Application, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. xin_li6666@yahoo.com.cn
authors.forename: Xin
authors.initials: X
authors.lastname: Li
authors.forename: Wen
authors.initials: W
authors.lastname: Du
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
authors.forename: Xiaoqing
authors.initials: X
authors.lastname: Li
authors.forename: Hongrui
authors.initials: H
authors.lastname: Li
authors.forename: Shi-Ang
authors.initials: SA
authors.lastname: Huang
mesh_terms: D000293:Adolescent; D000328:Adult; D000911:Antibodies, Monoclonal; D015703:Antigens, CD / Q000378:metabolism; D000951:Antigens, Neoplasm / Q000378:metabolism; D002648:Child; D002675:Child, Preschool; D003582:Cytogenetics; D005260:Female; D005434:Flow Cytometry / Q000379:methods*; D006801:Humans; D016130:Immunophenotyping / Q000379:methods*; D007223:Infant; D007621:Karyotyping; D015470:Leukemia, Myeloid, Acute / Q000175:diagnosis* / Q000235:genetics / Q000276:immunology*; D008297:Male; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000175:diagnosis* / Q000235:genetics / Q000276:immunology*; D012008:Recurrence; D055815:Young Adult
chemical_list: D000911:Antibodies, Monoclonal; D015703:Antigens, CD; D000951:Antigens, Neoplasm