alexa RUNX1 and its understudied role in breast cancer.
Bioinformatics & Systems Biology

Bioinformatics & Systems Biology

Journal of Computer Science & Systems Biology

Author(s): Janes KA

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Abstract The transcription factor Runt-related transcription factor 1 (RUNX1) is critical for the earliest steps of hematopoiesis. RUNX1 was originally identified as a gene fusion in acute myeloid leukemia (AML) and thus has garnered heavy attention as a tumor suppressor in hematopoietic malignancies. However, RUNX1 is also strongly expressed in breast epithelia and may be misregulated during tumorigenesis. Here, I discuss our recent work implicating RUNX1 in proliferation control during breast epithelial-acinar morphogenesis. My goal is to place these findings in the context of a handful of other reports, which together argue that RUNX1 could act as a tumor suppressor gene in breast cancer. Testing this hypothesis requires focused in vivo studies, because the major commercial platform for global mRNA expression profiling does not reliably reflect RUNX1 levels. Our in vitro results indicate that hyperproliferation in RUNX1-deficient breast epithelia relies on another family of transcription factors, the Forkhead box O (FOXO) proteins. FOXOs could, therefore, represent a synthetic-lethal target for RUNX1-deficient tumors if the hypothesized link to breast cancer is correct.
This article was published in Cell Cycle and referenced in Journal of Computer Science & Systems Biology

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