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Published on: September 16, 2012
Immunophenotypic characterization of acute leukemias in Bahia, Brazil
Mariane Melo Dos Santos1, Allan Souza Dos Santos1, Herbert Henrique de Melo Santos1
1Universidade Federal da Bahia, Salvador, BA, Brazil.
Insights
This study characterized acute leukemias in Bahia, Brazil, finding significant differences in antigen expression between age groups. These immunophenotypic profiles can inform targeted therapies and future research.
Area of Science:
- Hematology
- Immunology
- Oncology
Background:
- Acute leukemias represent a significant health burden globally.
- Immunophenotyping is crucial for accurate leukemia classification and treatment guidance.
Purpose of the Study:
- To define the immunophenotypic landscape of acute leukemias in Bahia, Brazil.
- To identify demographic and antigenic variations across different age groups.
Main Methods:
- Retrospective analysis of 796 new acute leukemia cases (2014-2018).
- Flow cytometry immunophenotyping utilized for data acquisition.
- Evaluation of demographic variables and leukemia antigen expression.
Main Results:
- Acute myeloid leukemia was more prevalent than acute lymphoblastic leukemia (42.7%).
- Significant age-related differences in marker expression and demographics were observed.
- B-cell acute lymphoblastic leukemia predominated over T-cell types; aberrant markers like CD7, CD56, CD66c, CD13, and CD33 were identified.
Conclusions:
- Immunophenotypic profiles of acute leukemias vary significantly between pediatric and adult populations.
- Findings support further correlation with genetic profiles and therapeutic responses.
- Potential for developing targeted antigen-specific therapies is highlighted.
Objective:
To characterize the immunophenotypic profile of acute leukemias in the population of the state of Bahia, Brazil.
Methods:
This is a descriptive, retrospective study. From 2014 to 2018, 796 new cases of acute leukemia were evaluated. The data were obtained from analysis of reports and records of tests performed by flow cytometry immunophenotyping. All individuals of all age groups diagnosed as acute lymphoblastic leukemia or acute myeloid leukemia were included in the study. Demographic variables and expression of leukemia antigens were evaluated.
Results:
Most cases were diagnosed as acute myeloid leukemia and 42.7% as acute lymphoblastic leukemia. Significant differences were found in expression of markers in acute leukemias when age groups were compared, as well as in demographic characteristics. B-cell acute lymphoblastic leukemia was more prevalent than cases of T-cell origin. Assessing the aberrant markers in acute myeloid leukemias, the non-acute promyelocytic leukemia group presented expression of CD7 and CD56 as the most frequent ones. In B-cell acute lymphoblastic leukemia, the most frequent aberrant markers were CD66c, CD13 and CD33.
Conclusion:
Significant differences were found as to several antigens when comparing adults and children, and these findings may contribute to future studies correlating the phenotypic profile to genetic characteristics and therapeutic response, including specific antigen therapies, which may be better targeted.
