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Clonal development and karyotype evolution during leukemogenesis of BCR/ABL transgenic mice
J W Voncken1, C Morris, P Pattengale
1Department of Pathology, Childrens Hospital of Los Angeles 90027.
Blood
|February 15, 1992
Summary
The BCR/ABL oncogene drives leukemia development. While early stages show normal chromosomes, advanced leukemia exhibits aneuploidy, suggesting BCR/ABL disrupts cell division regulation.
Area of Science:
- Oncology
- Genetics
- Molecular Biology
Background:
- The Philadelphia chromosome and BCR/ABL oncogene are key in leukemia.
- BCR/ABL P190 transgenic mice models offer insights into leukemia progression.
Purpose of the Study:
- To investigate chromosomal aberrations in BCR/ABL P190-induced leukemia.
- To understand the role of BCR/ABL in early and advanced stages of leukemia.
Main Methods:
- Karyotyping of bone marrow from BCR/ABL P190 transgenic mice at various disease stages.
- Analysis of leukemic cells from founders, progeny, and bone marrow transplant recipients.
Main Results:
- No karyotypically visible aberrations were found in early leukemia stages.
- Normal metaphases persisted even in terminal disease stages.
- Advanced leukemia showed high aneuploidy, particularly gains of chromosomes 12, 14, or 17.
Conclusions:
- BCR/ABL plays a primary role in leukemogenesis.
- The BCR/ABL gene appears to destabilize cell division regulation, leading to aneuploidy.