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Proliferation and Differentiation of Murine Myeloid Precursor 32D/G-CSF-R Cells
Published on: February 21, 2018
ARHGEF2::JAK2 Fusion Drives Leukemogenesis via CCNB1-Dependent Signaling
Yanan Ma1,2,3, Yan Jiang3, Linlin Wang3
1National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.
European Journal of Haematology
|July 3, 2026
Summary
The ARHGEF2::JAK2 fusion gene drives aggressive leukemia by promoting cell growth and survival. Targeting its downstream effector, CCNB1, offers a potential therapeutic strategy for fusion-driven leukemia.
Area of Science:
- Hematology
- Molecular Biology
- Oncology
Background:
- Leukemia is a complex blood cancer with poor prognosis in refractory cases.
- Fusion genes involving JAK2 are recognized oncogenic drivers in leukemia.
- The specific role of the ARHGEF2::JAK2 fusion gene in leukemia pathogenesis is not well understood.
Purpose of the Study:
- To elucidate the oncogenic mechanisms driven by the ARHGEF2::JAK2 fusion gene.
- To identify critical downstream molecular targets of ARHGEF2::JAK2.
- To evaluate the therapeutic potential of targeting identified pathways.
Main Methods:
- Utilized Ba/F3 cell lines and mouse xenograft models to assess leukemogenic potential.
- Employed RNA sequencing, qPCR, and Western blotting to analyze gene expression and protein levels.
- Performed shRNA knockdown experiments for functional validation of downstream targets.
Main Results:
- ARHGEF2::JAK2 promoted cytokine-independent proliferation and inhibited apoptosis, leading to aggressive leukemia in vivo.
- Ruxolitinib demonstrated efficacy in ameliorating ARHGEF2::JAK2-induced leukemogenesis.
- CCNB1 was identified as a key downstream effector; its knockdown reversed oncogenic phenotypes and improved survival.
Conclusions:
- ARHGEF2::JAK2 drives leukemogenesis through the upregulation of CCNB1.
- CCNB1 represents a promising therapeutic target for ARHGEF2::JAK2-driven leukemia.
- This study enhances understanding of fusion gene-driven leukemia pathogenesis.
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