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Leuk Lymphoma. 1993;11 Suppl 1:19-24.

Ph-positive leukemia: a transgenic mouse model.

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  • 1Department of Pathology, Children's Hospital of Los Angeles, CA 90027.


The presence of the BCR/ABL chimeric gene is the hallmark of defined types of human leukemia. To increase our knowledge of the oncogenic processes and to develop a model for this type of leukemia we generated a BCR/ABL (P190) transgenic mouse line. Over 95% of mice of this line die of leukemia or leukemia/lymphoma within 35-200 days of age. Karyotypically visible genetic alterations were absent from the early stages of BCR/ABL generated leukemia. A high frequency of aneuploidy was found in advanced leukemia indicating a primary and pivotal role for BCR/ABL in leukemogenesis. Moreover, the data suggest that BCR/ABL has a destabilizing effect on the regulation of the cell cycle. BCR/ABL expression was also found in tissues other than hematopoietic cells. However, this did not result in the development of solid tumors, strongly suggesting that the oncogenicity of BCR/ABL is limited to the hematopoietic lineage.

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