NFκB regulates p21 expression and controls DNA damage-induced leukemic differentiation - PubMed (original) (raw)

. 2018 Jul;37(27):3647-3656.

doi: 10.1038/s41388-018-0219-y. Epub 2018 Apr 6.

Affiliations

• PMID: 29622796
• DOI: 10.1038/s41388-018-0219-y

NFκB regulates p21 expression and controls DNA damage-induced leukemic differentiation

Claudia M Nicolae et al. Oncogene. 2018 Jul.

Abstract

DNA damage exposure is a major modifier of cell fate in both normal and cancer tissues. In response to DNA damage, myeloid leukemia cells activate a poorly understood terminal differentiation process. Here, we show that the NFκB pathway directly activates expression of the proliferation inhibitor p21 in response to DNA damage in myeloid leukemia cells. In order to understand the role of this unexpected regulatory event, we ablated the NFκB binding site we identified in the p21 promoter, using CRISPR/Cas9-mediated genome editing. We found that NFκB-mediated p21 activation controls DNA damage-induced myeloid differentiation. Our results uncover a p53-independent pathway for p21 activation involved in controlling hematopoietic cell fate.

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