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Chromosome abnormalities in leukemia and lymphoma.
Annals of Clinical and Laboratory Science
|March 1, 1983
Summary
Specific chromosome translocations are linked to distinct types of leukemia, suggesting these genetic changes may initiate the disease. Future research will focus on identifying genes at translocation sites and their altered functions.
Area of Science:
- Cytogenetics
- Molecular Biology
- Oncology
Background:
- Nonrandom chromosome abnormalities are hallmarks of human malignant tumors, particularly leukemias.
- Leukemias offer extensive cytogenetic data, revealing consistent chromosomal translocations associated with specific subtypes.
- Understanding these translocations is crucial for deciphering leukemogenesis.
Purpose of the Study:
- To review and highlight the specific chromosome translocations observed in various human leukemias.
- To discuss the potential role of these translocations as fundamental events in leukemic transformation.
- To identify future research directions in understanding the genetic basis of leukemia.
Main Methods:
- Review of existing cytogenetic data from human leukemia studies.
- Analysis of specific translocation patterns in chronic myeloid leukemia, acute nonlymphocytic leukemia, and B-cell acute lymphoblastic leukemia/Burkitt lymphoma.
- Correlation of chromosomal changes with specific leukemia subtypes and cell maturation stages.
Main Results:
- Chronic myeloid leukemia shows a consistent translocation t(9;22)(q34;q11) in most Ph1-positive patients.
- Acute nonlymphocytic leukemia exhibits specific translocations, t(8;21)(q22;q22) in AML-M2 and t(15;17)(q22?;q21?) in APL-M3.
- B-cell leukemias and Burkitt lymphoma frequently involve translocations at 8q24, such as t(8;14)(q24;q32), affecting immunoglobulin loci.
Conclusions:
- Consistent chromosome translocations are strongly associated with specific leukemia subtypes.
- These translocations may provide a growth advantage, driving the proliferation of aneuploid cell lines.
- Chromosome changes are potentially the initiating events in leukemic transformation, necessitating further gene identification and functional analysis.