
AbstractCD47 is a cell surface molecule that inhibits phagocytosis of cells that express it by binding to its receptor, SIRPα, on macrophages and other immune cells. CD47 is expressed at different levels by neoplastic and normal cells. Here, to reveal mechanisms by which different neoplastic cells generate this dominant ‘don’t eat me’ signal, we analyse the CD47 regulatory genomic landscape. We identify two distinct super-enhancers (SEs) associated with CD47 in certain cancer cell types. We show that a set of active constituent enhancers, located within the two CD47 SEs, regulate CD47 expression in different cancer cell types and that disruption of CD47 SEs reduces CD47 gene expression. Finally we report that the TNF-NFKB1 signalling pathway directly regulates CD47 by interacting with a constituent enhancer located within a CD47-associated SE specific to breast cancer. These results suggest that cancers can evolve SE to drive CD47 overexpression to escape immune surveillance.
570, Science, 610, Down-Regulation, Breast Neoplasms, CD47 Antigen, Article, Mice, Phagocytosis, Animals, Humans, Inflammation, Tumor Necrosis Factor-alpha, Q, NF-kappa B p50 Subunit, Up-Regulation, Gene Expression Regulation, Neoplastic, Enhancer Elements, Genetic, Female, Inflammation Mediators, Protein Binding, Signal Transduction
570, Science, 610, Down-Regulation, Breast Neoplasms, CD47 Antigen, Article, Mice, Phagocytosis, Animals, Humans, Inflammation, Tumor Necrosis Factor-alpha, Q, NF-kappa B p50 Subunit, Up-Regulation, Gene Expression Regulation, Neoplastic, Enhancer Elements, Genetic, Female, Inflammation Mediators, Protein Binding, Signal Transduction
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| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Top 10% | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Top 1% |
