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Gong C, Krupka JA, Gao J, Grigoropoulos NF, Cucco F, Barrans S, Igor DLM, Peixun Z, Sorca F, Jamie M, Amos B, Kwan SS, Philip B, Cathy B, Peter C, Vikki R, Suzanne T, Jernej U, Eve R, Reuben T, Thomas O, Ming D, Shamith S, Hodson DJ. Abstract PO-19: Sequential inverse dysregulation of the RNA helicases DDX3X and DDX3Y facilitates MYC-driven lymphomagenesis. Blood Cancer Discov 2020. [DOI: 10.1158/2643-3249.lymphoma20-po-19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Abstract
DDX3X is a ubiquitously expressed RNA helicase involved in multiple stages of RNA biogenesis. DDX3X is frequently mutated in Burkitt lymphoma, but the functional basis for this is unknown. Here, we show that loss-of-function DDX3X mutations are also commonly found in MYC-translocated diffuse large B-cell lymphoma. We reveal functional cooperation between mutant DDX3X and MYC in ex vivo cultured human germinal center B cells. By integrating results of iCLIP, ribosome profiling, and proteomics, we show WT DDX3X promotes the translation of mRNAs encoding components of the core translational machinery, thereby driving global protein synthesis. Loss-of-function DDX3X mutations act to buffer the effect of abrupt MYC expression and moderate MYC-driven global protein synthesis, thereby buffering MYC-induced proteotoxic stress during early lymphomagenesis. Established lymphoma cells subsequently restore full protein synthetic capacity by aberrant expression of DDX3Y, a Y-chromosome homologue that is normally expressed exclusively in testis. These findings show how sequential dysregulation of DDX3X and DDX3Y acts to titrate global protein synthesis to suit the stage-specific needs of developing lymphoma cells and identify DDX3Y as an attractive, male-specific therapeutic target absent from normal human B cells but required for the survival of male lymphomas.
Citation Format: Chun Gong, Joanna A. Krupka, Jane Gao, Nicholas F. Grigoropoulos, Francesco Cucco, Sharon Barrans, De Los Mozos Igor, Zhou Peixun, Forde Sorca, Matthews Jamie, Burke Amos, Sze Siu Kwan, Beer Philip, Burton Cathy, Campbell Peter, Rand Vikki, Turner Suzanne, Ule Jernej, Roman Eve, Tooze Reuben, Oellerich Thomas, Du Ming, Samarajiwa Shamith, Daniel J. Hodson. Sequential inverse dysregulation of the RNA helicases DDX3X and DDX3Y facilitates MYC-driven lymphomagenesis [abstract]. In: Proceedings of the AACR Virtual Meeting: Advances in Malignant Lymphoma; 2020 Aug 17-19. Philadelphia (PA): AACR; Blood Cancer Discov 2020;1(3_Suppl):Abstract nr PO-19.
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Affiliation(s)
- Chun Gong
- 1University of Cambridge, Cambridge, United Kingdom,
| | | | - Jane Gao
- 1University of Cambridge, Cambridge, United Kingdom,
| | | | | | - Sharon Barrans
- 3St. James Institute of Oncology, Leeds, United Kingdom,
| | | | - Zhou Peixun
- 5Teesside University, Middlesbrough, United Kingdom,
| | - Forde Sorca
- 1University of Cambridge, Cambridge, United Kingdom,
| | | | - Burke Amos
- 1University of Cambridge, Cambridge, United Kingdom,
| | - Sze Siu Kwan
- 6Nanyang Technological University, Singapore, Singapore,
| | - Beer Philip
- 7Wellcome Trust Sanger Institute, Cambridge, United Kingdom,
| | - Burton Cathy
- 3St. James Institute of Oncology, Leeds, United Kingdom,
| | - Campbell Peter
- 7Wellcome Trust Sanger Institute, Cambridge, United Kingdom,
| | - Rand Vikki
- 5Teesside University, Middlesbrough, United Kingdom,
| | | | - Ule Jernej
- 4The Francis Crick Institute, London, United Kingdom,
| | - Roman Eve
- 8University of York, York, United Kingdom,
| | | | | | - Du Ming
- 1University of Cambridge, Cambridge, United Kingdom,
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Do DV, Strauss B, Cukuroglu E, Macaulay I, Wee KB, Hu TX, Igor RDLM, Lee C, Harrison A, Butler R, Dietmann S, Jernej U, Marioni J, Smith CWJ, Göke J, Surani MA. SRSF3 maintains transcriptome integrity in oocytes by regulation of alternative splicing and transposable elements. Cell Discov 2018; 4:33. [PMID: 29928511 PMCID: PMC6006335 DOI: 10.1038/s41421-018-0032-3] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 01/19/2018] [Accepted: 03/28/2018] [Indexed: 02/08/2023] Open
Abstract
The RNA-binding protein SRSF3 (also known as SRp20) has critical roles in the regulation of pre-mRNA splicing. Zygotic knockout of Srsf3 results in embryo arrest at the blastocyst stage. However, SRSF3 is also present in oocytes, suggesting that it might be critical as a maternally inherited factor. Here we identify SRSF3 as an essential regulator of alternative splicing and of transposable elements to maintain transcriptome integrity in mouse oocyte. Using 3D time-lapse confocal live imaging, we show that conditional deletion of Srsf3 in fully grown germinal vesicle oocytes substantially compromises the capacity of germinal vesicle breakdown (GVBD), and consequently entry into meiosis. By combining single cell RNA-seq, and oocyte micromanipulation with steric blocking antisense oligonucleotides and RNAse-H inducing gapmers, we found that the GVBD defect in mutant oocytes is due to both aberrant alternative splicing and derepression of B2 SINE transposable elements. Together, our study highlights how control of transcriptional identity of the maternal transcriptome by the RNA-binding protein SRSF3 is essential to the development of fertilized-competent oocytes.
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Affiliation(s)
- Dang Vinh Do
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge, CB2 1QN UK
- Department of Physiology, Development and Neuroscience, University of Cambridge, Downing Street, Cambridge, CB2 3DY UK
| | - Bernhard Strauss
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge, CB2 1QN UK
| | - Engin Cukuroglu
- Computational and Systems Biology, Genome Institute of Singapore, 60 Biopolis Street, Singapore, 138672 Singapore
| | - Iain Macaulay
- Earlham Institute, Norwich Research Park, Norwich, NR4 7UH UK
| | - Keng Boon Wee
- Department Fluid Dynamics, Institute of High Performance Computing, 1 Fusionopolis Way, Singapore, 138632 Singapore
- Biomolecular Function Discovery Division, Bioinformatics Institute, 30 Biopolis Street, Singapore, 138671 Singapore
| | - Tim Xiaoming Hu
- EMBL European Bioinformatics Institute, Wellcome Genome Campus, Hinxton, CB10 1SD, Cambridge, UK
| | | | - Caroline Lee
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge, CB2 1QN UK
- Department of Physiology, Development and Neuroscience, University of Cambridge, Downing Street, Cambridge, CB2 3DY UK
| | - Andrew Harrison
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge, CB2 1QN UK
| | - Richard Butler
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge, CB2 1QN UK
| | - Sabine Dietmann
- Wellcome Trust Medical Research Council Stem Cell Institute, University of Cambridge, Tennis Court Road, Cambridge, CB2 1QR UK
| | - Ule Jernej
- Department of Molecular Neuroscience, UCL Institute of Neurology, London, UK
| | - John Marioni
- Department of Molecular Neuroscience, UCL Institute of Neurology, London, UK
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Robinson Way, Cambridge, CB2 0RE UK
- Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, CB10 1SA UK
| | - Christopher W. J. Smith
- Department of Biochemistry, University of Cambridge, Tennis Court Road, Cambridge, CB2 1QW UK
| | - Jonathan Göke
- Computational and Systems Biology, Genome Institute of Singapore, 60 Biopolis Street, Singapore, 138672 Singapore
| | - M. Azim Surani
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge, CB2 1QN UK
- Department of Physiology, Development and Neuroscience, University of Cambridge, Downing Street, Cambridge, CB2 3DY UK
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