Eμ-TCL1xMyc: A Novel Mouse Model for Concurrent CLL and B-Cell Lymphoma
Aberrant Myc expression is a major factor in the pathogenesis of aggressive lymphoma, and these lymphomas, while clinically heterogeneous, often are resistant to currently available treatments and have poor survival. Myc expression can also be seen in aggressive lymphomas that are observed in the co...
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Published in | Clinical cancer research Vol. 25; no. 20; pp. 6260 - 6273 |
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Main Authors | , , , , , , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
15.10.2019
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Subjects | |
Online Access | Get full text |
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Summary: | Aberrant Myc expression is a major factor in the pathogenesis of aggressive lymphoma, and these lymphomas, while clinically heterogeneous, often are resistant to currently available treatments and have poor survival. Myc expression can also be seen in aggressive lymphomas that are observed in the context of CLL, and we sought to develop a mouse model that could be used to study therapeutic strategies for aggressive lymphoma in the context of CLL.
We crossed the Eμ-TCL1 mouse model with the Eμ-Myc mouse model to investigate the clinical phenotype associated with B-cell-restricted expression of these oncogenes. The resulting malignancy was then extensively characterized, from both a clinical and biologic perspective.
Eμ-TCL1xMyc mice uniformly developed highly aggressive lymphoid disease with histologically, immunophenotypically, and molecularly distinct concurrent CLL and B-cell lymphoma, leading to a significantly reduced lifespan. Injection of cells from diseased Eμ-TCL1xMyc into WT mice established a disease similar to that in the double-transgenic mice. Both Eμ-TCL1xMyc mice and mice with disease after adoptive transfer failed to respond to ibrutinib. Effective and durable disease control was, however, observed by selective inhibition of nuclear export protein exportin-1 (XPO1) using a compound currently in clinical development for relapsed/refractory malignancies, including CLL and lymphoma.
The Eμ-TCL1xMyc mouse is a new preclinical tool for testing experimental drugs for aggressive B-cell lymphoma, including in the context of CLL. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 FL, KAR, BKH, RL and JAW designed experiments, analyzed data, wrote the manuscript and reviewed the final version. FL also planned, optimized, conducted, analyzed and interpreted all immunophenotyping and flow sorting experiments, and led sequencing experiments. BKH processed and interpreted histopathology and gross pathology. AP, RB and PY monitored quality of sequencing experiments, processed, analyzed and interpreted the data, prepared related figures and table and edited the manuscript. LY provided statistical support in the planning and analysis of experiments, and edited the manuscript. JB processed and interpreted bone marrow aspirates, prepared figures and edited the manuscript. VMG, ZAH, PK, RM, LLS, RW and DKW conducted experiments, cared for mice, and edited the manuscript. All authors reviewed the manuscript and agreed to submit it for publication. These first authors contributed equally to this work. AUTHORSHIP CONTRIBUTIONS These senior authors contributed equally to this work. |
ISSN: | 1078-0432 1557-3265 |
DOI: | 10.1158/1078-0432.CCR-19-0273 |