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Neilson LJ, Cartwright D, Risteli M, Jokinen EM, McGarry L, Sandvik T, Nikolatou K, Hodge K, Atkinson S, Vias M, Kay EJ, Brenton JD, Carlin LM, Bryant DM, Salo T, Zanivan S. Omentum-derived matrix enables the study of metastatic ovarian cancer and stromal cell functions in a physiologically relevant environment. Matrix Biol Plus 2023; 19-20:100136. [PMID: 38223308 PMCID: PMC10784634 DOI: 10.1016/j.mbplus.2023.100136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Revised: 10/20/2023] [Accepted: 11/12/2023] [Indexed: 01/16/2024] Open
Abstract
High-grade serous (HGS) ovarian cancer is the most lethal gynaecological disease in the world and metastases is a major cause. The omentum is the preferential metastatic site in HGS ovarian cancer patients and in vitro models that recapitulate the original environment of this organ at cellular and molecular level are being developed to study basic mechanisms that underpin this disease. The tumour extracellular matrix (ECM) plays active roles in HGS ovarian cancer pathology and response to therapy. However, most of the current in vitro models use matrices of animal origin and that do not recapitulate the complexity of the tumour ECM in patients. Here, we have developed omentum gel (OmGel), a matrix made from tumour-associated omental tissue of HGS ovarian cancer patients that has unprecedented similarity to the ECM of HGS omental tumours and is simple to prepare. When used in 2D and 3D in vitro assays to assess cancer cell functions relevant to metastatic ovarian cancer, OmGel performs as well as or better than the widely use Matrigel and does not induce additional phenotypic changes to ovarian cancer cells. Surprisingly, OmGel promotes pronounced morphological changes in cancer associated fibroblasts (CAFs). These changes were associated with the upregulation of proteins that define subsets of CAFs in tumour patient samples, highlighting the importance of using clinically and physiologically relevant matrices for in vitro studies. Hence, OmGel provides a step forward to study the biology of HGS omental metastasis. Metastasis in the omentum are also typical of other cancer types, particularly gastric cancer, implying the relevance of OmGel to study the biology of other highly lethal cancers.
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Affiliation(s)
| | - Douglas Cartwright
- Cancer Research UK Scotland Institute, Glasgow, UK
- School of Cancer Sciences, University of Glasgow, Glasgow, UK
| | - Maija Risteli
- Research Unit of Population Health, Medical Research Center Oulu, University of Oulu and Oulu University Hospital, Oulu, Finland
| | - Elina M. Jokinen
- Department of Bacteriology and Immunology, Translational Immunology Research Program, University of Helsinki, Finland
| | - Lynn McGarry
- Cancer Research UK Scotland Institute, Glasgow, UK
| | - Toni Sandvik
- Research Unit of Population Health, Medical Research Center Oulu, University of Oulu and Oulu University Hospital, Oulu, Finland
| | - Konstantina Nikolatou
- Cancer Research UK Scotland Institute, Glasgow, UK
- School of Cancer Sciences, University of Glasgow, Glasgow, UK
| | - Kelly Hodge
- Cancer Research UK Scotland Institute, Glasgow, UK
| | | | - Maria Vias
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Robinson Way, Cambridge, UK
| | - Emily J. Kay
- Cancer Research UK Scotland Institute, Glasgow, UK
| | - James D. Brenton
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Robinson Way, Cambridge, UK
| | - Leo M. Carlin
- Cancer Research UK Scotland Institute, Glasgow, UK
- School of Cancer Sciences, University of Glasgow, Glasgow, UK
| | - David M. Bryant
- Cancer Research UK Scotland Institute, Glasgow, UK
- School of Cancer Sciences, University of Glasgow, Glasgow, UK
| | - Tuula Salo
- Research Unit of Population Health, Medical Research Center Oulu, University of Oulu and Oulu University Hospital, Oulu, Finland
- Department of Pathology, University of Helsinki, Helsinki, Finland
- Department of Oral and Maxillofacial Diseases, Clinicum, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Sara Zanivan
- Cancer Research UK Scotland Institute, Glasgow, UK
- School of Cancer Sciences, University of Glasgow, Glasgow, UK
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Nikolatou K, Sandilands E, Román‐Fernández A, Cumming EM, Freckmann E, Lilla S, Buetow L, McGarry L, Neilson M, Shaw R, Strachan D, Miller C, Huang DT, McNeish IA, Norman JC, Zanivan S, Bryant DM. PTEN deficiency exposes a requirement for an ARF GTPase module for integrin-dependent invasion in ovarian cancer. EMBO J 2023; 42:e113987. [PMID: 37577760 PMCID: PMC10505920 DOI: 10.15252/embj.2023113987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 07/13/2023] [Accepted: 07/19/2023] [Indexed: 08/15/2023] Open
Abstract
Dysregulation of the PI3K/AKT pathway is a common occurrence in high-grade serous ovarian carcinoma (HGSOC), with the loss of the tumour suppressor PTEN in HGSOC being associated with poor prognosis. The cellular mechanisms of how PTEN loss contributes to HGSOC are largely unknown. We here utilise time-lapse imaging of HGSOC spheroids coupled to a machine learning approach to classify the phenotype of PTEN loss. PTEN deficiency induces PI(3,4,5)P3 -rich and -dependent membrane protrusions into the extracellular matrix (ECM), resulting in a collective invasion phenotype. We identify the small GTPase ARF6 as a crucial vulnerability of HGSOC cells upon PTEN loss. Through a functional proteomic CRISPR screen of ARF6 interactors, we identify the ARF GTPase-activating protein (GAP) AGAP1 and the ECM receptor β1-integrin (ITGB1) as key ARF6 interactors in HGSOC regulating PTEN loss-associated invasion. ARF6 functions to promote invasion by controlling the recycling of internalised, active β1-integrin to maintain invasive activity into the ECM. The expression of the CYTH2-ARF6-AGAP1 complex in HGSOC patients is inversely associated with outcome, allowing the identification of patient groups with improved versus poor outcome. ARF6 may represent a therapeutic vulnerability in PTEN-depleted HGSOC.
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Affiliation(s)
- Konstantina Nikolatou
- School of Cancer SciencesUniversity of GlasgowGlasgowUK
- The CRUK Beatson InstituteGlasgowUK
| | - Emma Sandilands
- School of Cancer SciencesUniversity of GlasgowGlasgowUK
- The CRUK Beatson InstituteGlasgowUK
| | - Alvaro Román‐Fernández
- School of Cancer SciencesUniversity of GlasgowGlasgowUK
- The CRUK Beatson InstituteGlasgowUK
| | - Erin M Cumming
- School of Cancer SciencesUniversity of GlasgowGlasgowUK
- The CRUK Beatson InstituteGlasgowUK
| | - Eva Freckmann
- School of Cancer SciencesUniversity of GlasgowGlasgowUK
- The CRUK Beatson InstituteGlasgowUK
| | | | | | | | | | | | | | | | - Danny T Huang
- School of Cancer SciencesUniversity of GlasgowGlasgowUK
- The CRUK Beatson InstituteGlasgowUK
| | - Iain A McNeish
- Department of Surgery and Cancer, Ovarian Cancer Action Research CentreImperial College LondonLondonUK
| | - James C Norman
- School of Cancer SciencesUniversity of GlasgowGlasgowUK
- The CRUK Beatson InstituteGlasgowUK
| | - Sara Zanivan
- School of Cancer SciencesUniversity of GlasgowGlasgowUK
- The CRUK Beatson InstituteGlasgowUK
| | - David M Bryant
- School of Cancer SciencesUniversity of GlasgowGlasgowUK
- The CRUK Beatson InstituteGlasgowUK
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Nikolatou K, Bryant DM, Sandilands E. The ARF GTPase regulatory network in collective invasion and metastasis. Biochem Soc Trans 2023; 51:1559-1569. [PMID: 37622523 PMCID: PMC10586773 DOI: 10.1042/bst20221355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 08/14/2023] [Accepted: 08/15/2023] [Indexed: 08/26/2023]
Abstract
The ability to remodel and move cellular membranes, and the cargoes regulated by these membranes, allows for specialised functions to occur in distinct regions of the cell in a process known as cellular polarisation. The ability to collectively co-ordinate such polarisation between cells allows for the genesis of multicellularity, such as the formation of organs. During tumourigenesis, the rules for such tissue polarisation become dysregulated, allowing for collective polarity rearrangements that can drive metastasis. In this review, we focus on how membrane trafficking underpins collective cell invasion and metastasis in cancer. We examine this through the lens of the ADP-ribosylation factor (ARF) subfamily of small GTPases, focusing on how the ARF regulatory network - ARF activators, inactivators, effectors, and modifications - controls ARF GTPase function.
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Affiliation(s)
- Konstantina Nikolatou
- School of Cancer Sciences, University of Glasgow, Glasgow G61 1HQ, U.K
- The CRUK Beatson Institute, Glasgow G61 1BD, U.K
| | - David M. Bryant
- School of Cancer Sciences, University of Glasgow, Glasgow G61 1HQ, U.K
- The CRUK Beatson Institute, Glasgow G61 1BD, U.K
| | - Emma Sandilands
- School of Cancer Sciences, University of Glasgow, Glasgow G61 1HQ, U.K
- The CRUK Beatson Institute, Glasgow G61 1BD, U.K
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4
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Román-Fernández A, Mansour MA, Kugeratski FG, Anand J, Sandilands E, Galbraith L, Rakovic K, Freckmann EC, Cumming EM, Park J, Nikolatou K, Lilla S, Shaw R, Strachan D, Mason S, Patel R, McGarry L, Katoch A, Campbell KJ, Nixon C, Miller CJ, Leung HY, Le Quesne J, Norman JC, Zanivan S, Blyth K, Bryant DM. Spatial regulation of the glycocalyx component podocalyxin is a switch for prometastatic function. Sci Adv 2023; 9:eabq1858. [PMID: 36735782 PMCID: PMC9897673 DOI: 10.1126/sciadv.abq1858] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Accepted: 01/03/2023] [Indexed: 06/18/2023]
Abstract
The glycocalyx component and sialomucin podocalyxin (PODXL) is required for normal tissue development by promoting apical membranes to form between cells, triggering lumen formation. Elevated PODXL expression is also associated with metastasis and poor clinical outcome in multiple tumor types. How PODXL presents this duality in effect remains unknown. We identify an unexpected function of PODXL as a decoy receptor for galectin-3 (GAL3), whereby the PODXL-GAL3 interaction releases GAL3 repression of integrin-based invasion. Differential cortical targeting of PODXL, regulated by ubiquitination, is the molecular mechanism controlling alternate fates. Both PODXL high and low surface levels occur in parallel subpopulations within cancer cells. Orthotopic intraprostatic xenograft of PODXL-manipulated cells or those with different surface levels of PODXL define that this axis controls metastasis in vivo. Clinically, interplay between PODXL-GAL3 stratifies prostate cancer patients with poor outcome. Our studies define the molecular mechanisms and context in which PODXL promotes invasion and metastasis.
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Affiliation(s)
- Alvaro Román-Fernández
- Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1QH, UK
- The CRUK Beatson Institute, Glasgow G61 1BD, UK
| | - Mohammed A. Mansour
- Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1QH, UK
- Cancer Biology and Therapy Lab, Division of Human Sciences, School of Applied Sciences, London South Bank University, London SE1 0AA, UK
- Biochemistry Division, Department of Chemistry, Faculty of Science, Tanta University, Tanta 31527, Egypt
| | - Fernanda G. Kugeratski
- Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1QH, UK
- The CRUK Beatson Institute, Glasgow G61 1BD, UK
- Department of Immunology, The University of Texas MD Anderson Cancer Center, 7455 Fannin Street, Houston, TX 77054, USA
| | | | - Emma Sandilands
- Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1QH, UK
- The CRUK Beatson Institute, Glasgow G61 1BD, UK
| | | | - Kai Rakovic
- Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1QH, UK
- The CRUK Beatson Institute, Glasgow G61 1BD, UK
| | - Eva C. Freckmann
- Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1QH, UK
- The CRUK Beatson Institute, Glasgow G61 1BD, UK
| | - Erin M. Cumming
- Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1QH, UK
- The CRUK Beatson Institute, Glasgow G61 1BD, UK
| | - Ji Park
- Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1QH, UK
- The CRUK Beatson Institute, Glasgow G61 1BD, UK
| | - Konstantina Nikolatou
- Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1QH, UK
- The CRUK Beatson Institute, Glasgow G61 1BD, UK
| | | | - Robin Shaw
- The CRUK Beatson Institute, Glasgow G61 1BD, UK
| | | | - Susan Mason
- The CRUK Beatson Institute, Glasgow G61 1BD, UK
| | | | | | - Archana Katoch
- Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1QH, UK
- The CRUK Beatson Institute, Glasgow G61 1BD, UK
| | | | - Colin Nixon
- The CRUK Beatson Institute, Glasgow G61 1BD, UK
| | - Crispin J. Miller
- Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1QH, UK
- The CRUK Beatson Institute, Glasgow G61 1BD, UK
| | - Hing Y. Leung
- Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1QH, UK
- The CRUK Beatson Institute, Glasgow G61 1BD, UK
| | - John Le Quesne
- Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1QH, UK
- The CRUK Beatson Institute, Glasgow G61 1BD, UK
| | - James C. Norman
- Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1QH, UK
- The CRUK Beatson Institute, Glasgow G61 1BD, UK
| | - Sara Zanivan
- Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1QH, UK
- The CRUK Beatson Institute, Glasgow G61 1BD, UK
| | - Karen Blyth
- Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1QH, UK
- The CRUK Beatson Institute, Glasgow G61 1BD, UK
| | - David M. Bryant
- Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1QH, UK
- The CRUK Beatson Institute, Glasgow G61 1BD, UK
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5
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Freckmann EC, Sandilands E, Cumming E, Neilson M, Román-Fernández A, Nikolatou K, Nacke M, Lannagan TRM, Hedley A, Strachan D, Salji M, Morton JP, McGarry L, Leung HY, Sansom OJ, Miller CJ, Bryant DM. Traject3d allows label-free identification of distinct co-occurring phenotypes within 3D culture by live imaging. Nat Commun 2022; 13:5317. [PMID: 36085324 PMCID: PMC9463449 DOI: 10.1038/s41467-022-32958-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [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: 08/17/2021] [Accepted: 08/25/2022] [Indexed: 11/09/2022] Open
Abstract
Single cell profiling by genetic, proteomic and imaging methods has expanded the ability to identify programmes regulating distinct cell states. The 3-dimensional (3D) culture of cells or tissue fragments provides a system to study how such states contribute to multicellular morphogenesis. Whether cells plated into 3D cultures give rise to a singular phenotype or whether multiple biologically distinct phenotypes arise in parallel is largely unknown due to a lack of tools to detect such heterogeneity. Here we develop Traject3d (Trajectory identification in 3D), a method for identifying heterogeneous states in 3D culture and how these give rise to distinct phenotypes over time, from label-free multi-day time-lapse imaging. We use this to characterise the temporal landscape of morphological states of cancer cell lines, varying in metastatic potential and drug resistance, and use this information to identify drug combinations that inhibit such heterogeneity. Traject3d is therefore an important companion to other single-cell technologies by facilitating real-time identification via live imaging of how distinct states can lead to alternate phenotypes that occur in parallel in 3D culture.
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Affiliation(s)
- Eva C Freckmann
- Institute of Cancer Sciences, University of Glasgow, Glasgow, G61 1HQ, United Kingdom
- The CRUK Beatson Institute, Glasgow, G61 1BD, United Kingdom
| | - Emma Sandilands
- Institute of Cancer Sciences, University of Glasgow, Glasgow, G61 1HQ, United Kingdom
- The CRUK Beatson Institute, Glasgow, G61 1BD, United Kingdom
| | - Erin Cumming
- Institute of Cancer Sciences, University of Glasgow, Glasgow, G61 1HQ, United Kingdom
- The CRUK Beatson Institute, Glasgow, G61 1BD, United Kingdom
| | - Matthew Neilson
- The CRUK Beatson Institute, Glasgow, G61 1BD, United Kingdom
| | - Alvaro Román-Fernández
- Institute of Cancer Sciences, University of Glasgow, Glasgow, G61 1HQ, United Kingdom
- The CRUK Beatson Institute, Glasgow, G61 1BD, United Kingdom
| | - Konstantina Nikolatou
- Institute of Cancer Sciences, University of Glasgow, Glasgow, G61 1HQ, United Kingdom
- The CRUK Beatson Institute, Glasgow, G61 1BD, United Kingdom
| | - Marisa Nacke
- Institute of Cancer Sciences, University of Glasgow, Glasgow, G61 1HQ, United Kingdom
- The CRUK Beatson Institute, Glasgow, G61 1BD, United Kingdom
| | | | - Ann Hedley
- The CRUK Beatson Institute, Glasgow, G61 1BD, United Kingdom
| | - David Strachan
- The CRUK Beatson Institute, Glasgow, G61 1BD, United Kingdom
| | - Mark Salji
- The CRUK Beatson Institute, Glasgow, G61 1BD, United Kingdom
| | - Jennifer P Morton
- Institute of Cancer Sciences, University of Glasgow, Glasgow, G61 1HQ, United Kingdom
- The CRUK Beatson Institute, Glasgow, G61 1BD, United Kingdom
| | - Lynn McGarry
- The CRUK Beatson Institute, Glasgow, G61 1BD, United Kingdom
| | - Hing Y Leung
- Institute of Cancer Sciences, University of Glasgow, Glasgow, G61 1HQ, United Kingdom
- The CRUK Beatson Institute, Glasgow, G61 1BD, United Kingdom
| | - Owen J Sansom
- Institute of Cancer Sciences, University of Glasgow, Glasgow, G61 1HQ, United Kingdom
- The CRUK Beatson Institute, Glasgow, G61 1BD, United Kingdom
| | - Crispin J Miller
- Institute of Cancer Sciences, University of Glasgow, Glasgow, G61 1HQ, United Kingdom
- The CRUK Beatson Institute, Glasgow, G61 1BD, United Kingdom
| | - David M Bryant
- Institute of Cancer Sciences, University of Glasgow, Glasgow, G61 1HQ, United Kingdom.
- The CRUK Beatson Institute, Glasgow, G61 1BD, United Kingdom.
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6
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Nacke M, Sandilands E, Nikolatou K, Román-Fernández Á, Mason S, Patel R, Lilla S, Yelland T, Galbraith LCA, Freckmann EC, McGarry L, Morton JP, Shanks E, Leung HY, Markert E, Ismail S, Zanivan S, Blyth K, Bryant DM. An ARF GTPase module promoting invasion and metastasis through regulating phosphoinositide metabolism. Nat Commun 2021; 12:1623. [PMID: 33712589 PMCID: PMC7955138 DOI: 10.1038/s41467-021-21847-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 09/27/2019] [Accepted: 02/12/2021] [Indexed: 12/21/2022] Open
Abstract
The signalling pathways underpinning cell growth and invasion use overlapping components, yet how mutually exclusive cellular responses occur is unclear. Here, we report development of 3-Dimensional culture analyses to separately quantify growth and invasion. We identify that alternate variants of IQSEC1, an ARF GTPase Exchange Factor, act as switches to promote invasion over growth by controlling phosphoinositide metabolism. All IQSEC1 variants activate ARF5- and ARF6-dependent PIP5-kinase to promote PI(3,4,5)P3-AKT signalling and growth. In contrast, select pro-invasive IQSEC1 variants promote PI(3,4,5)P3 production to form invasion-driving protrusions. Inhibition of IQSEC1 attenuates invasion in vitro and metastasis in vivo. Induction of pro-invasive IQSEC1 variants and elevated IQSEC1 expression occurs in a number of tumour types and is associated with higher-grade metastatic cancer, activation of PI(3,4,5)P3 signalling, and predicts long-term poor outcome across multiple cancers. IQSEC1-regulated phosphoinositide metabolism therefore is a switch to induce invasion over growth in response to the same external signal. Targeting IQSEC1 as the central regulator of this switch may represent a therapeutic vulnerability to stop metastasis.
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Affiliation(s)
- Marisa Nacke
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
- The CRUK Beatson Institute, Glasgow, UK
| | - Emma Sandilands
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
- The CRUK Beatson Institute, Glasgow, UK
| | - Konstantina Nikolatou
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
- The CRUK Beatson Institute, Glasgow, UK
| | - Álvaro Román-Fernández
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
- The CRUK Beatson Institute, Glasgow, UK
| | | | | | | | | | | | - Eva C Freckmann
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
- The CRUK Beatson Institute, Glasgow, UK
| | | | - Jennifer P Morton
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
- The CRUK Beatson Institute, Glasgow, UK
| | | | - Hing Y Leung
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
- The CRUK Beatson Institute, Glasgow, UK
| | | | - Shehab Ismail
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
- The CRUK Beatson Institute, Glasgow, UK
- Department of Chemistry, KU Leuven, Celestijnenlaan, Belgium
| | - Sara Zanivan
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
- The CRUK Beatson Institute, Glasgow, UK
| | - Karen Blyth
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
- The CRUK Beatson Institute, Glasgow, UK
| | - David M Bryant
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK.
- The CRUK Beatson Institute, Glasgow, UK.
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