BRCA1 loss of function is considered to promote tumorigenesis through impairment of the protein's role in DNA damage repair. By studying BRCA1 mutations that do not affect this function but still confer cancer predisposition, this report identifies a new function of BRCA1, the repression of miR-155 through modulation of HDAC activity. miR-155 increase correlates with BRCA1 loss or mutation in humans, and it likely to mediate some of the oncogenic effects of BRCA1 deficiency.
- Suhwan Chang
- Rui-Hong Wang
- Shyam K Sharan
