[Immunomorphocytochemical and immunofluorescent study methods in the immunodiagnosis of acute leukemias]
Insights
This study compared immunophenotyping methods for acute leukemia (AL) blast cells. APAAP staining is more sensitive than immunofluorescence for diagnosing AL subtypes and improving treatment strategies.
Area of Science:
- Hematology
- Immunology
- Oncology
Background:
- Accurate immunophenotyping is crucial for diagnosing and classifying acute leukemia (AL).
- Differentiating AL subtypes requires detailed analysis of blast cell antigens and differentiation stages.
Purpose of the Study:
- To compare the sensitivity and informativeness of immunocytochemical investigation (APAAP) and immunofluorescence (IF) for AL immunophenotyping.
- To correlate immunophenotypic findings with cytochemical indices for improved AL classification.
Main Methods:
- Immunophenotyping of bone marrow and blood blast cells using a wide panel of monoclonal antibodies.
- Comparison of APAAP and IF techniques for immunophenotyping.
- Morphological and cytochemical evaluations including glycogen, lipids, mucopolysaccharides, lysosomal enzymes, and myeloperoxidase activity.
Main Results:
- APAAP and IF yielded similar results, but APAAP demonstrated higher sensitivity and informativeness.
- APAAP effectively determined blast cell phenotype and the level of differentiation block.
- Immunological variants correlated with specific cytochemical indices.
Conclusions:
- APAAP is a more sensitive and informative method for early differential immunodiagnosis of acute leukemia variants.
- Immunophenotyping combined with cytochemical analysis supports a more profound classification of acute lymphoblastic leukemia.
- Improved classification can lead to better diagnosis and treatment protocol design for AL patients.
Abstract:
Immunophenotyping results were compared for blast cells of the bone marrow and blood in a wide panel of monoclonal antibodies to differentiating antigens of the cells in various stages of hemopoiesis. The study was performed in acute leukemia (AL) patients using the immunocytochemical investigation (APAAP) and immunofluorescence (IF). Morphological evaluation of the marrow and blood involved cytochemical tests on glycogen, lipids, acid sulfated mucopolysaccharides, measurements of lysosomal enzymes and myeloperoxidase activities. Immunophenotyping was made with APAAP and IF. The results of the latter appeared approximately similar. APAAP proved more sensitive and informative in determination of blast cell phenotype and probable level of differentiation block. This may be used for earlier differential immunodiagnosis of acute leukemia variants. The immunological variants were found to correlate with some cytochemical indices pointing to the validity of more profound acute lymphoblastic leukemia classification to improve the diagnosis and treatment protocol designing.
