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Cellular lineages in normal and leukemic hemopoiesis.
Progress in Clinical and Biological Research
|January 1, 1983
Summary
Human clonal hemopathies, including acute myeloblastic leukemia (AML), arise from abnormal pluripotent stem cells. These diseases involve dominant clones and novel, abnormally assembled differentiation programs, not just blocked normal ones.
Area of Science:
- Hematology
- Stem Cell Biology
- Cancer Biology
Background:
- Clonal hemopathies, such as acute myeloblastic leukemia (AML), originate from pluripotent stem cells.
- These disorders are characterized by the dominance of a single abnormal clone within the hematopoietic system.
Purpose of the Study:
- To explore the cellular basis of normal hematopoiesis and clonal hemopathies.
- To investigate the developmental pathways of leukemic blast cells in AML.
Main Methods:
- Analysis of stem cell properties and clonal expansion in hemopoietic disorders.
- Examination of differentiation programs in various myelopoietic lineages.
- Evaluation of blast cell markers in AML to test hypotheses.
Main Results:
- Blast cells in AML may not result from blocked normal programs but from novel, abnormally assembled programs.
- Simultaneous expression of multiple lineage markers in individual AML blast cells supports this model.
Conclusions:
- Understanding hemopoiesis and AML requires considering stem cell behavior and abnormal differentiation programs.
- The proposed model offers a new perspective on the pathogenesis of AML.