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- W2172912160 abstract "// Simona Valletta 1 , Hamid Dolatshad 1 , Matthias Bartenstein 2 , Bon Ham Yip 1 , Erica Bello 1 , Shanisha Gordon 2 , Yiting Yu 2 , Jacqueline Shaw 1 , Swagata Roy 1 , Laura Scifo 1 , Anna Schuh 3 , Andrea Pellagatti 1 , Tudor A. Fulga 4 , Amit Verma 2 , Jacqueline Boultwood 1 1 Bloodwise Molecular Haematology Unit, Nuffield Division of Clinical Laboratory Sciences, Radcliffe Department of Medicine, University of Oxford and BRC Blood Theme, NIHR Oxford Biomedical Centre, Oxford University Hospital, Oxford, UK 2 Albert Einstein College of Medicine, Bronx, NY, USA 3 NIHR Biomedical Research Centre, University of Oxford, Oxford, UK 4 Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, John Radcliffe Hospital, Oxford, UK Correspondence to: Jacqueline Boultwood, e-mail: jacqueline.boultwood@ndcls.ox.ac.uk Keywords: ASXL1, CRISPR, chronic myeloid leukemia, mutation correction, tumor suppressor Received: July 22, 2015 Accepted: November 08, 2015 Published: November 26, 2015 ABSTRACT Recurrent somatic mutations of the epigenetic modifier and tumor suppressor ASXL1 are common in myeloid malignancies, including chronic myeloid leukemia (CML), and are associated with poor clinical outcome. CRISPR/Cas9 has recently emerged as a powerful and versatile genome editing tool for genome engineering in various species. We have used the CRISPR/Cas9 system to correct the ASXL1 homozygous nonsense mutation present in the CML cell line KBM5, which lacks ASXL1 protein expression. CRISPR/Cas9-mediated ASXL1 homozygous correction resulted in protein re-expression with restored normal function, including down-regulation of Polycomb repressive complex 2 target genes. Significantly reduced cell growth and increased myeloid differentiation were observed in ASXL1 mutation-corrected cells, providing new insights into the role of ASXL1 in human myeloid cell differentiation. Mice xenografted with mutation-corrected KBM5 cells showed significantly longer survival than uncorrected xenografts. These results show that the sole correction of a driver mutation in leukemia cells increases survival in vivo in mice. This study provides proof-of-concept for driver gene mutation correction via CRISPR/Cas9 technology in human leukemia cells and presents a strategy to illuminate the impact of oncogenic mutations on cellular function and survival." @default.
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- W2172912160 date "2015-11-26" @default.
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- W2172912160 title "<i>ASXL1</i> mutation correction by CRISPR/Cas9 restores gene function in leukemia cells and increases survival in mouse xenografts" @default.
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- W2172912160 doi "https://doi.org/10.18632/oncotarget.6392" @default.
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