Loss of Gadd45b accelerates BCR-ABL-driven CML

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Abstract

Gadd45b is a member of Gadd45 stress sensor protein family that also includes Gadd45a and Gadd45g. To investigate the effect of Gadd45b in bcr-abl oncogene driven chronic myeloid leukemia (CML) development, syngeneic wild type lethally irradiated mice were reconstituted with either wild type or Gadd45b null myeloid progenitors transduced with a retroviral vector expressing BCR-ABL. Loss of Gadd45b was observed to accelerate BCR-ABL driven CML development with shortened median mouse survival time. BCR-ABL Gadd45b deficient CML progenitors exhibited increased proliferation and decreased apoptosis, associated with hyper-activation of c-Jun NH2- terminal kinase and Stat5. These results provide novel evidence that gadd45b, like gadd45a, functions as a suppressor of BCR-ABL driven leukemia, albeit via a different mechanism.

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Sha, X., Hoffman, B., & Liebermann, D. A. (2018). Loss of Gadd45b accelerates BCR-ABL-driven CML. Oncotarget, 9(70), 33360–33367. https://doi.org/10.18632/oncotarget.26076

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