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Int J Lab Hematol ; 32(1 Pt 1): e96-105, 2010 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-19594833

RESUMEN

INTRODUCTION: Immune humoral neutropenia (Np) could be the consequence of anti-polymorphonuclear neutrophil (PMN) antibodies, circulating immune complexes (CIC) and/or antibodies against myeloid precursors. Granulocyte immunofluorescence test (GIFT) and a leukoagglutination technique (LAGT) assays are recommended for its diagnosis. METHODS: Fifty adult patients with secondary Np were screened for anti-PMN. GIFT by flow cytometry from viable PMN and LAGT were employed. In addition, CIC levels, low expression of CD16(b) (CD16 (b)(low)), PMN phenotype and sera tumor necrosis factor-alpha (TNF-alpha) were also evaluated. RESULTS: Direct IgG-PMN binding (dir-GIFT) was positive in 16% of the patients. Antibodies against autologous PMN were detected in 32% of the samples by indirect (ind)-GIFT and demonstrated in 70% of the sera by both ind-GIFT and/or LAGT. Predominance of human neutrophil alloantigen (HNA)-1b and HNA-2 expression was confirmed. CD16(b)(low) was detected in 16% of the patient's PMN and TNF-alpha in 68% of sera patients. CONCLUSION: Our results suggest that diagnosis of immune Np in the laboratory may be improved by focusing on patient's PMN together with the assessment of cellular markers.


Asunto(s)
Anticuerpos/inmunología , Leucopenia/inmunología , Neutropenia/inmunología , Neutrófilos/inmunología , Adulto , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad
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