期刊
FRONTIERS IN ONCOLOGY
卷 10, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fonc.2020.588641
关键词
CREB binding protein; cell differentiation; cell senescence; chronic myeloid leukemia; tyrosine kinase inhibitors resistance
类别
资金
- National Science & Technology Major Project Key New Drug Creation and Manufacturing Program, China [2018ZX09711002]
- Natural Scientific Foundation of China [82073882, 81673463]
- Guangdong Provincial Special Fund for Marine Economic Development Project [GDNRC [2020]042]
- Science and Technology Foundation of Guangdong Province [2016A030312014]
- Scientific and Technological Leading Talent Project of Guangdong Province (2015, China)
This study found that the high expression of CBP in CML cells, and down-regulation of CBP can promote the differentiation of CML cells and induce p53-dependent cell senescence, suggesting that CBP blockade can be a potential treatment for CML independent of the BCR-ABL mutation status.
The treatment of chronic myeloid leukemia (CML) with BCR-ABL tyrosine kinase inhibitors (TKIs), such as imatinib, has yielded clinical success. However, the direct targeting of BCR-ABL does not eradicate CML cells expressing mutant BCR-ABL, especially the T315I mutation in BCR-ABL. Moreover, increasing mutations were identified in BCR-ABL domain, resulting in TKIs resistance recently. It is necessary to find BCR-ABL-independent target for treating CML patients with various mutations, including T315I mutation in BCR-ABL. The dichotomous behavior of CREB binding protein (CBP) and E1A protein (p300), recruited by beta-catenin associated with self-renewal and differentiation, have been identified in hematopoietic stem cells, respectively. In this study, CBP was aberrantly expressed in CML cells on the basis of Oncomine dataset. The beta-catenin bound with much more CBP than p300 in CML cells. Down-regulation of CBP inhibited cell proliferation capacity and increased the binding of beta-catenin to p300, thus promoting cell differentiation and p53-dependent cell senescence in CML cells with either wild type or T315I mutant BCR-ABL in vitro and in vivo models. These demonstrate CBP blockage can be developed for the treatment of CML independent of BCR-ABL mutation status including T315I.
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