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Pickering KA, Gilroy K, Cassidy JW, Fey SK, Najumudeen AK, Zeiger LB, Vincent DF, Gay DM, Johansson J, Fordham RP, Miller B, Clark W, Hedley A, Unal EB, Kiel C, McGhee E, Machesky LM, Nixon C, Johnsson AE, Bain M, Strathdee D, van Hoof SR, Medema JP, Anderson KI, Brachmann SM, Stucke VM, Malliri A, Drysdale M, Turner M, Serrano L, Myant K, Campbell AD, Sansom OJ. A RAC-GEF network critical for early intestinal tumourigenesis. Nat Commun 2021; 12:56. [PMID: 33397922 PMCID: PMC7782582 DOI: 10.1038/s41467-020-20255-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 11/17/2020] [Indexed: 01/29/2023] Open
Abstract
RAC1 activity is critical for intestinal homeostasis, and is required for hyperproliferation driven by loss of the tumour suppressor gene Apc in the murine intestine. To avoid the impact of direct targeting upon homeostasis, we reasoned that indirect targeting of RAC1 via RAC-GEFs might be effective. Transcriptional profiling of Apc deficient intestinal tissue identified Vav3 and Tiam1 as key targets. Deletion of these indicated that while TIAM1 deficiency could suppress Apc-driven hyperproliferation, it had no impact upon tumourigenesis, while VAV3 deficiency had no effect. Intriguingly, deletion of either gene resulted in upregulation of Vav2, with subsequent targeting of all three (Vav2-/- Vav3-/- Tiam1-/-), profoundly suppressing hyperproliferation, tumourigenesis and RAC1 activity, without impacting normal homeostasis. Critically, the observed RAC-GEF dependency was negated by oncogenic KRAS mutation. Together, these data demonstrate that while targeting RAC-GEF molecules may have therapeutic impact at early stages, this benefit may be lost in late stage disease.
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Affiliation(s)
- K A Pickering
- CRUK Beatson Institute, Garscube Estate, Switchback Road, Glasgow, G61 1BD, UK
| | - K Gilroy
- CRUK Beatson Institute, Garscube Estate, Switchback Road, Glasgow, G61 1BD, UK
| | - J W Cassidy
- CRUK Cambridge Institute, University of Cambridge, Robinson Way, Cambridge, CB2 ORE, UK
| | - S K Fey
- CRUK Beatson Institute, Garscube Estate, Switchback Road, Glasgow, G61 1BD, UK
- Institute of Cancer Sciences, University of Glasgow, Garscube Estate, Switchback Road, Glasgow, G61 1QH, UK
| | - A K Najumudeen
- CRUK Beatson Institute, Garscube Estate, Switchback Road, Glasgow, G61 1BD, UK
| | - L B Zeiger
- CRUK Beatson Institute, Garscube Estate, Switchback Road, Glasgow, G61 1BD, UK
- Institute of Cancer Sciences, University of Glasgow, Garscube Estate, Switchback Road, Glasgow, G61 1QH, UK
| | - D F Vincent
- CRUK Beatson Institute, Garscube Estate, Switchback Road, Glasgow, G61 1BD, UK
| | - D M Gay
- CRUK Beatson Institute, Garscube Estate, Switchback Road, Glasgow, G61 1BD, UK
| | - J Johansson
- CRUK Beatson Institute, Garscube Estate, Switchback Road, Glasgow, G61 1BD, UK
| | - R P Fordham
- CRUK Beatson Institute, Garscube Estate, Switchback Road, Glasgow, G61 1BD, UK
| | - B Miller
- CRUK Beatson Institute, Garscube Estate, Switchback Road, Glasgow, G61 1BD, UK
| | - W Clark
- CRUK Beatson Institute, Garscube Estate, Switchback Road, Glasgow, G61 1BD, UK
| | - A Hedley
- CRUK Beatson Institute, Garscube Estate, Switchback Road, Glasgow, G61 1BD, UK
| | - E B Unal
- EMBL/CRG Systems Biology Research Unit, Centre for Genomic Regulation (CRC), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), 08003, Barcelona, Spain
- Institute for Theoretical Biology, Humboldt Universität zu Berlin, Berlin, Germany
| | - C Kiel
- EMBL/CRG Systems Biology Research Unit, Centre for Genomic Regulation (CRC), Barcelona, Spain
| | - E McGhee
- CRUK Beatson Institute, Garscube Estate, Switchback Road, Glasgow, G61 1BD, UK
| | - L M Machesky
- CRUK Beatson Institute, Garscube Estate, Switchback Road, Glasgow, G61 1BD, UK
- Institute of Cancer Sciences, University of Glasgow, Garscube Estate, Switchback Road, Glasgow, G61 1QH, UK
| | - C Nixon
- CRUK Beatson Institute, Garscube Estate, Switchback Road, Glasgow, G61 1BD, UK
| | - A E Johnsson
- The Babraham Institute, Babraham Hall, Babraham, Cambridge, CB22 3AT, UK
| | - M Bain
- IBAHCM and School of Veterinary Medicine, 464 Bearsden Road, Bearsden, Glasgow, G61 1QH, UK
| | - D Strathdee
- CRUK Beatson Institute, Garscube Estate, Switchback Road, Glasgow, G61 1BD, UK
| | - S R van Hoof
- Laboratory for Experimental Oncology and Radiobiology (LEXOR), Center for Experimental Molecular Medicine (CEMM) and Cancer Center Amsterdam, Academic Medical Center, Amsterdam, The Netherlands
- Oncode Institute, Academic Medical Center, Amsterdam, The Netherlands
| | - J P Medema
- Laboratory for Experimental Oncology and Radiobiology (LEXOR), Center for Experimental Molecular Medicine (CEMM) and Cancer Center Amsterdam, Academic Medical Center, Amsterdam, The Netherlands
- Oncode Institute, Academic Medical Center, Amsterdam, The Netherlands
| | - K I Anderson
- The Francis Crick Institute, Mill Hill Laboratory, London, NW7 1AA, UK
| | - S M Brachmann
- Novartis Institutes for BioMedical Research, Klybeckstrasse, 141, 4002, Basel, Switzerland
| | - V M Stucke
- Novartis Institutes for BioMedical Research, Klybeckstrasse, 141, 4002, Basel, Switzerland
| | - A Malliri
- CRUK Manchester Institute, 553 Wilmslow Road, Manchester, M20 4BX, UK
| | - M Drysdale
- Broad Institute, 415 Main St, Cambridge, MA, 02142, United States
| | - M Turner
- The Babraham Institute, Babraham Hall, Babraham, Cambridge, CB22 3AT, UK
| | - L Serrano
- EMBL/CRG Systems Biology Research Unit, Centre for Genomic Regulation (CRC), Barcelona, Spain
| | - K Myant
- Edinburgh Research Centre, The Institute of Genetics and Molecular Medicine, Crewe Road South, Edinburgh, EH4 2XR, UK.
| | - A D Campbell
- CRUK Beatson Institute, Garscube Estate, Switchback Road, Glasgow, G61 1BD, UK.
| | - O J Sansom
- CRUK Beatson Institute, Garscube Estate, Switchback Road, Glasgow, G61 1BD, UK.
- Institute of Cancer Sciences, University of Glasgow, Garscube Estate, Switchback Road, Glasgow, G61 1QH, UK.
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