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Oser, Matthew G; Sabet, Amin H; Gao, Wenhua; Chakraborty, Abhishek A; Schinzel, Anna C; Jennings, Rebecca B; Fonseca, Raquel; Bonal, Dennis M; Booker, Matthew A; Flaifel, Abdallah; Novak, Jesse S; Christensen, Camilla L; Zhang, Hua; Herbert, Zachary T; Tolstorukov, Michael Y; Buss, Elizabeth J; Wong, Kwok-Kin; Bronson, Roderick T; Nguyen, Quang-De; Signoretti, Sabina; Kaelin, Jr, William G
Genes & development, 12/2019, Letnik: 33, Številka: 23-24Journal Article
More than 90% of small cell lung cancers (SCLCs) harbor loss-of-function mutations in the tumor suppressor gene The canonical function of the gene product, pRB, is to repress the E2F transcription factor family, but pRB also functions to regulate cellular differentiation in part through its binding to the histone demethylase KDM5A (also known as RBP2 or JARID1A). We show that KDM5A promotes SCLC proliferation and SCLC's neuroendocrine differentiation phenotype in part by sustaining expression of the neuroendocrine transcription factor ASCL1. Mechanistically, we found that KDM5A sustains ASCL1 levels and neuroendocrine differentiation by repressing NOTCH2 and NOTCH target genes. To test the role of KDM5A in SCLC tumorigenesis in vivo, we developed a CRISPR/Cas9-based mouse model of SCLC by delivering an adenovirus (or an adeno-associated virus AAV) that expresses Cre recombinase and sgRNAs targeting , and into the lungs of Lox-Stop-Lox Cas9 mice. Coinclusion of a KDM5A sgRNA decreased SCLC tumorigenesis and metastasis, and the SCLCs that formed despite the absence of KDM5A had higher NOTCH activity compared to SCLCs. This work establishes a role for KDM5A in SCLC tumorigenesis and suggests that KDM5 inhibitors should be explored as treatments for SCLC.
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Vir: Osebne bibliografije
in: SICRIS
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