Assessment of monocytic component in acute myelomonocytic and monocytic/monoblastic leukemias by a chemiluminescent assay

Classically, the monocytic component of acute myelomonocytic (FAB-M4) and acute monocytic/monoblastic (FAB-M5) leukemias is demonstrated by nonspecific esterase positivity in cytochemical stainings. We have previously demonstrated that non-specific esterases from normal monocytes can be determined b...

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Veröffentlicht in:The hematology journal : the official journal of the European Haematology Association 2003, Vol.4 (1), p.26-30
Hauptverfasser: da Fonseca, Luiz M, Brunetti, Iguatemy L, Campa, Ana, Catalani, Luiz H, Calado, Rodrigo T, Falcão, Roberto P
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container_title The hematology journal : the official journal of the European Haematology Association
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creator da Fonseca, Luiz M
Brunetti, Iguatemy L
Campa, Ana
Catalani, Luiz H
Calado, Rodrigo T
Falcão, Roberto P
description Classically, the monocytic component of acute myelomonocytic (FAB-M4) and acute monocytic/monoblastic (FAB-M5) leukemias is demonstrated by nonspecific esterase positivity in cytochemical stainings. We have previously demonstrated that non-specific esterases from normal monocytes can be determined by a chemiluminescent method. In the present study, we investigated whether this assay can also determine the monocytic component of FAB-M4 and FAB-M5 and distinguish these acute myeloid leukemia (AML) categories. Bone marrow samples were obtained from 66 patients with AML (M0, two cases; M1, 12 cases; M2, 13 cases; M3, 10 cases; M4, 11 cases; M5, 12 cases; M6, two cases; M7, four cases). Cells were incubated with a standard reaction mixture and chemiluminescence was measured for 10 min. Two parameters were assessed, the peak (PLE) and the integrated light emission (ILE). Both PLE and ILE were higher in FAB-M4 and FAB-M5 subtypes compared to other AML subtypes (P
doi_str_mv 10.1038/sj.thj.6200209
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We have previously demonstrated that non-specific esterases from normal monocytes can be determined by a chemiluminescent method. In the present study, we investigated whether this assay can also determine the monocytic component of FAB-M4 and FAB-M5 and distinguish these acute myeloid leukemia (AML) categories. Bone marrow samples were obtained from 66 patients with AML (M0, two cases; M1, 12 cases; M2, 13 cases; M3, 10 cases; M4, 11 cases; M5, 12 cases; M6, two cases; M7, four cases). Cells were incubated with a standard reaction mixture and chemiluminescence was measured for 10 min. Two parameters were assessed, the peak (PLE) and the integrated light emission (ILE). Both PLE and ILE were higher in FAB-M4 and FAB-M5 subtypes compared to other AML subtypes (P&lt;0.001). In addition, the classification of AML cases into FAB-M4, FAB-M5 and nonmonocytic subtypes based on ILE analysis was concordant with alpha-naphthyl acetate esterase (ANAE) in 97% of cases (kappa coefficient 0.94, P&lt;0.001). These findings indicate that this chemiluminescent assay was able to determine the monocytic component of FAB-M4 and FAB-M5 cells, and the classification of AML subtypes based on chemiluminescent analysis strongly agreed with the cytochemical ANAE-staining. 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We have previously demonstrated that non-specific esterases from normal monocytes can be determined by a chemiluminescent method. In the present study, we investigated whether this assay can also determine the monocytic component of FAB-M4 and FAB-M5 and distinguish these acute myeloid leukemia (AML) categories. Bone marrow samples were obtained from 66 patients with AML (M0, two cases; M1, 12 cases; M2, 13 cases; M3, 10 cases; M4, 11 cases; M5, 12 cases; M6, two cases; M7, four cases). Cells were incubated with a standard reaction mixture and chemiluminescence was measured for 10 min. Two parameters were assessed, the peak (PLE) and the integrated light emission (ILE). Both PLE and ILE were higher in FAB-M4 and FAB-M5 subtypes compared to other AML subtypes (P&lt;0.001). In addition, the classification of AML cases into FAB-M4, FAB-M5 and nonmonocytic subtypes based on ILE analysis was concordant with alpha-naphthyl acetate esterase (ANAE) in 97% of cases (kappa coefficient 0.94, P&lt;0.001). These findings indicate that this chemiluminescent assay was able to determine the monocytic component of FAB-M4 and FAB-M5 cells, and the classification of AML subtypes based on chemiluminescent analysis strongly agreed with the cytochemical ANAE-staining. 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We have previously demonstrated that non-specific esterases from normal monocytes can be determined by a chemiluminescent method. In the present study, we investigated whether this assay can also determine the monocytic component of FAB-M4 and FAB-M5 and distinguish these acute myeloid leukemia (AML) categories. Bone marrow samples were obtained from 66 patients with AML (M0, two cases; M1, 12 cases; M2, 13 cases; M3, 10 cases; M4, 11 cases; M5, 12 cases; M6, two cases; M7, four cases). Cells were incubated with a standard reaction mixture and chemiluminescence was measured for 10 min. Two parameters were assessed, the peak (PLE) and the integrated light emission (ILE). Both PLE and ILE were higher in FAB-M4 and FAB-M5 subtypes compared to other AML subtypes (P&lt;0.001). In addition, the classification of AML cases into FAB-M4, FAB-M5 and nonmonocytic subtypes based on ILE analysis was concordant with alpha-naphthyl acetate esterase (ANAE) in 97% of cases (kappa coefficient 0.94, P&lt;0.001). These findings indicate that this chemiluminescent assay was able to determine the monocytic component of FAB-M4 and FAB-M5 cells, and the classification of AML subtypes based on chemiluminescent analysis strongly agreed with the cytochemical ANAE-staining. In conclusion, this chemiluminescent assay is a simple, fast and objective method, which may be useful as an alternative tool in the differential diagnosis of AML subtypes.</abstract><cop>England</cop><pmid>12692517</pmid><doi>10.1038/sj.thj.6200209</doi><tpages>5</tpages></addata></record>
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ispartof The hematology journal : the official journal of the European Haematology Association, 2003, Vol.4 (1), p.26-30
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subjects Acute Disease
Adolescent
Adult
Aged
Aged, 80 and over
Benzoates - metabolism
Bone Marrow - pathology
Carboxylesterase
Carboxylic Ester Hydrolases - analysis
Child
Child, Preschool
Cryopreservation
Diagnosis, Differential
Female
Horseradish Peroxidase - metabolism
Humans
Leukemia, Monocytic, Acute - diagnosis
Leukemia, Monocytic, Acute - enzymology
Leukemia, Monocytic, Acute - pathology
Leukemia, Myeloid - pathology
Leukemia, Myelomonocytic, Acute - diagnosis
Leukemia, Myelomonocytic, Acute - enzymology
Leukemia, Myelomonocytic, Acute - pathology
Luminescent Measurements
Male
Middle Aged
Monocytes - enzymology
Monocytes - pathology
Neoplasm Proteins - analysis
Neoplastic Stem Cells - enzymology
Neoplastic Stem Cells - pathology
Sodium Fluoride - pharmacology
title Assessment of monocytic component in acute myelomonocytic and monocytic/monoblastic leukemias by a chemiluminescent assay
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