1
|
Mircetic J, Camgöz A, Abohawya M, Ding L, Dietzel J, Tobar SG, Paszkowski-Rogacz M, Seidlitz T, Schmäche T, Mehnert MC, Sidorova O, Weitz J, Buchholz F, Stange DE. CRISPR/Cas9 Screen in Gastric Cancer Patient-Derived Organoids Reveals KDM1A-NDRG1 Axis as a Targetable Vulnerability. Small Methods 2023; 7:e2201605. [PMID: 36908010 DOI: 10.1002/smtd.202201605] [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] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 02/01/2023] [Indexed: 06/09/2023]
Abstract
Viability CRISPR screens have proven indispensable in parsing genome function. However, their application in new, more physiologically relevant culturing systems like patient-derived organoids (PDOs) has been much slower. To probe epigenetic contribution to gastric cancer (GC), the third leading cause of cancer-related deaths worldwide, the first negative selection CRISPR screen in GC PDOs that faithfully preserve primary tumor characteristics is performed. Extensive quality control measurements showing feasibility of CRISPR screens in primary organoid culture are provided. The screen reveals the histone lysine demethylase-1A (KDM1A) to constitute a GC vulnerability. Both genetic and pharmacological inhibition of KDM1A cause organoid growth retardation. Further, it is shown that most of KDM1A cancer-supporting functions center on repression of N-myc downstream regulates gene-1 (NDRG1). De-repression of NDRG1 by KDM1A inhibitors (KDM1Ai) causes inhibition of Wnt signaling and a strong G1 cell cycle arrest. Finally, by profiling 20 GC PDOs, it is shown that NDRG1 upregulation predicts KDM1Ai response with 100% sensitivity and 82% specificity in the tested cohort. Thus, this work pioneers the use of negative selection CRISPR screens in patient-derived organoids, identifies a marker of KDM1Ai response, and accordingly a cohort of patients who may benefit from such therapy.
Collapse
Affiliation(s)
- Jovan Mircetic
- German Cancer Consortium (DKTK), Partner Site Dresden, German Cancer Research Center (DKFZ), 01309, Dresden, Germany
- Mildred Scheel Early Career Center (MSNZ) P2, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307, Dresden, Germany
| | - Aylin Camgöz
- Division of Pediatric Neurooncology, German Cancer Research Center (DKFZ), German Cancer Consortium (DKTK), 69120, Heidelberg, Germany
- National Center for Tumor Diseases (NCT), 01307, Dresden, Germany
- German Cancer Research Center (DKFZ), 01307, Heidelberg, Germany
- Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307, Dresden, Germany
- Helmholtz-Zentrum Dresden - Rossendorf (HZDR), 01307, Dresden, Germany
| | - Moustafa Abohawya
- German Cancer Consortium (DKTK), Partner Site Dresden, German Cancer Research Center (DKFZ), 01309, Dresden, Germany
| | - Li Ding
- Medical Systems Biology, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307, Dresden, Germany
| | - Julia Dietzel
- Mildred Scheel Early Career Center (MSNZ) P2, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307, Dresden, Germany
| | - Sebastián García Tobar
- Mildred Scheel Early Career Center (MSNZ) P2, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307, Dresden, Germany
- Department of Visceral, Thoracic and Vascular Surgery, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307, Dresden, Germany
| | - Maciej Paszkowski-Rogacz
- Medical Systems Biology, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307, Dresden, Germany
| | - Therese Seidlitz
- Department of Visceral, Thoracic and Vascular Surgery, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307, Dresden, Germany
| | - Tim Schmäche
- National Center for Tumor Diseases (NCT), 01307, Dresden, Germany
- German Cancer Research Center (DKFZ), 01307, Heidelberg, Germany
- Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307, Dresden, Germany
- Helmholtz-Zentrum Dresden - Rossendorf (HZDR), 01307, Dresden, Germany
- Department of Visceral, Thoracic and Vascular Surgery, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307, Dresden, Germany
| | - Marie-Christin Mehnert
- Mildred Scheel Early Career Center (MSNZ) P2, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307, Dresden, Germany
| | - Olga Sidorova
- Medical Systems Biology, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307, Dresden, Germany
- Experimental and Clinical Research Center (ECRC) of the Max Delbrück Center (MDC) and Charité Berlin, 10117, Berlin, Germany
| | - Jürgen Weitz
- National Center for Tumor Diseases (NCT), 01307, Dresden, Germany
- German Cancer Research Center (DKFZ), 01307, Heidelberg, Germany
- Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307, Dresden, Germany
- Helmholtz-Zentrum Dresden - Rossendorf (HZDR), 01307, Dresden, Germany
- Department of Visceral, Thoracic and Vascular Surgery, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307, Dresden, Germany
| | - Frank Buchholz
- National Center for Tumor Diseases (NCT), 01307, Dresden, Germany
- German Cancer Research Center (DKFZ), 01307, Heidelberg, Germany
- Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307, Dresden, Germany
- Helmholtz-Zentrum Dresden - Rossendorf (HZDR), 01307, Dresden, Germany
- Medical Systems Biology, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307, Dresden, Germany
| | - Daniel E Stange
- German Cancer Consortium (DKTK), Partner Site Dresden, German Cancer Research Center (DKFZ), 01309, Dresden, Germany
- National Center for Tumor Diseases (NCT), 01307, Dresden, Germany
- German Cancer Research Center (DKFZ), 01307, Heidelberg, Germany
- Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307, Dresden, Germany
- Helmholtz-Zentrum Dresden - Rossendorf (HZDR), 01307, Dresden, Germany
- Department of Visceral, Thoracic and Vascular Surgery, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307, Dresden, Germany
| |
Collapse
|
2
|
Sayed S, Sidorova OA, Hennig A, Augsburg M, Cortés Vesga CP, Abohawya M, Schmitt LT, Sürün D, Stange DE, Mircetic J, Buchholz F. Efficient Correction of Oncogenic KRAS and TP53 Mutations through CRISPR Base Editing. Cancer Res 2022; 82:3002-3015. [PMID: 35802645 PMCID: PMC9437569 DOI: 10.1158/0008-5472.can-21-2519] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 08/19/2021] [Accepted: 06/29/2022] [Indexed: 01/07/2023]
Abstract
KRAS is the most frequently mutated oncogene in human cancer, and its activating mutations represent long-sought therapeutic targets. Programmable nucleases, particularly the CRISPR-Cas9 system, provide an attractive tool for genetically targeting KRAS mutations in cancer cells. Here, we show that cleavage of a panel of KRAS driver mutations suppresses growth in various human cancer cell lines, revealing their dependence on mutant KRAS. However, analysis of the remaining cell population after long-term Cas9 expression unmasked the occurence of oncogenic KRAS escape variants that were resistant to Cas9-cleavage. In contrast, the use of an adenine base editor to correct oncogenic KRAS mutations progressively depleted the targeted cells without the appearance of escape variants and allowed efficient and simultaneous correction of a cancer-associated TP53 mutation. Oncogenic KRAS and TP53 base editing was possible in patient-derived cancer organoids, suggesting that base editor approaches to correct oncogenic mutations could be developed for functional interrogation of vulnerabilities in a personalized manner for future precision oncology applications. SIGNIFICANCE Repairing KRAS mutations with base editors can be used for providing a better understanding of RAS biology and may lay the foundation for improved treatments for KRAS-mutant cancers.
Collapse
Affiliation(s)
- Shady Sayed
- Medical Systems Biology, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.,National Center for Tumor Diseases (NCT), Dresden, Germany; Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany; Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Dresden, Germany
| | - Olga A. Sidorova
- Medical Systems Biology, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Alexander Hennig
- National Center for Tumor Diseases (NCT), Dresden, Germany; Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany; Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Dresden, Germany.,Mildred Scheel Early Career Center (MSNZ) P2, National Center for Tumor Diseases Dresden (NCT/UCC), Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Martina Augsburg
- Medical Systems Biology, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Catherine P. Cortés Vesga
- Medical Systems Biology, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Moustafa Abohawya
- German Cancer Research Center (DKFZ), Heidelberg and German Cancer Consortium (DKTK) Partner Site, Dresden, Germany
| | - Lukas T. Schmitt
- Medical Systems Biology, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Duran Sürün
- Medical Systems Biology, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Daniel E. Stange
- National Center for Tumor Diseases (NCT), Dresden, Germany; Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany; Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Dresden, Germany.,Mildred Scheel Early Career Center (MSNZ) P2, National Center for Tumor Diseases Dresden (NCT/UCC), Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.,German Cancer Research Center (DKFZ), Heidelberg and German Cancer Consortium (DKTK) Partner Site, Dresden, Germany
| | - Jovan Mircetic
- Medical Systems Biology, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.,German Cancer Research Center (DKFZ), Heidelberg and German Cancer Consortium (DKTK) Partner Site, Dresden, Germany
| | - Frank Buchholz
- Medical Systems Biology, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.,National Center for Tumor Diseases (NCT), Dresden, Germany; Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany; Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Dresden, Germany.,Mildred Scheel Early Career Center (MSNZ) P2, National Center for Tumor Diseases Dresden (NCT/UCC), Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.,German Cancer Research Center (DKFZ), Heidelberg and German Cancer Consortium (DKTK) Partner Site, Dresden, Germany.,Corresponding Author: Frank Buchholz, Medical Systems Biology, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany. E-mail:
| |
Collapse
|
3
|
Dabbish AM, Abdelzaher HM, Abohawya M, Shamma S, Mahmoud YH, Maged A, Manaa M, Hassany M, Kobeissy F, Bazgir O, El-Fawal H, Azzazy HME, Abdelnaser A. Prognostic MicroRNA Panel for HCV-Associated HCC: Integrating Computational Biology and Clinical Validation. Cancers (Basel) 2022; 14:3036. [PMID: 35804809 PMCID: PMC9265118 DOI: 10.3390/cancers14133036] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Revised: 01/29/2022] [Accepted: 02/05/2022] [Indexed: 02/06/2023] Open
Abstract
Early detection of hepatocellular carcinoma (HCC) will reduce morbidity and mortality rates of this widely spread disease. Dysregulation in microRNA (miRNA) expression is associated with HCC progression. The objective is to identify a panel of differentially expressed miRNAs (DE-miRNAs) to enhance HCC early prediction in hepatitis C virus (HCV) infected patients. Candidate miRNAs were selected using a bioinformatic analysis of microarray and RNA-sequencing datasets, resulting in nine DE-miRNAs (miR-142, miR-150, miR-183, miR-199a, miR-215, miR-217, miR-224, miR-424, and miR-3607). Their expressions were validated in the serum of 44 healthy individuals, 62 non-cirrhotic HCV patients, 67 cirrhotic-HCV, and 72 HCV-associated-HCC patients using real-time PCR (qPCR). There was a significant increase in serum concentrations of the nine-candidate miRNAs in HCC and HCV patients relative to healthy individuals. MiR-424, miR-199a, miR-142, and miR-224 expressions were significantly altered in HCC compared to non-cirrhotic patients. A panel of five miRNAs improved sensitivity and specificity of HCC detection to 100% and 95.12% relative to healthy controls. Distinguishing HCC from HCV-treated patients was achieved by 70.8% sensitivity and 61.9% specificity using the combined panel, compared to alpha-fetoprotein (51.4% sensitivity and 60.67% specificity). These preliminary data show that the novel miRNAs panel (miR-150, miR-199a, miR-224, miR-424, and miR-3607) could serve as a potential non-invasive biomarker for HCC early prediction in chronic HCV patients. Further prospective studies on a larger cohort of patients should be conducted to assess the potential prognostic ability of the miRNAs panel.
Collapse
Affiliation(s)
- Areeg M. Dabbish
- Biotechnology Graduate Program, Department of Biology, School of Sciences and Engineering, The American University in Cairo, New Cairo 11835, Egypt; (A.M.D.); (M.A.)
| | - Hana M. Abdelzaher
- Institute of Global Health and Human Ecology (IGHHE), The American University in Cairo, New Cairo 11835, Egypt; (H.M.A.); (S.S.); (H.E.-F.)
| | - Moustafa Abohawya
- Biotechnology Graduate Program, Department of Biology, School of Sciences and Engineering, The American University in Cairo, New Cairo 11835, Egypt; (A.M.D.); (M.A.)
| | - Samir Shamma
- Institute of Global Health and Human Ecology (IGHHE), The American University in Cairo, New Cairo 11835, Egypt; (H.M.A.); (S.S.); (H.E.-F.)
| | - Yosra H. Mahmoud
- Fellow of Clinical Pathology, National Hepatology and Tropical Medicine Research Institute (NHTMRI), Cairo 11562, Egypt;
| | - Amr Maged
- Tropical Medicine Department, National Hepatology and Tropical Medicine Research Institute (NHTMRI), Cairo 11562, Egypt; (A.M.); (M.M.); (M.H.)
| | - Mohamed Manaa
- Tropical Medicine Department, National Hepatology and Tropical Medicine Research Institute (NHTMRI), Cairo 11562, Egypt; (A.M.); (M.M.); (M.H.)
| | - Mohamed Hassany
- Tropical Medicine Department, National Hepatology and Tropical Medicine Research Institute (NHTMRI), Cairo 11562, Egypt; (A.M.); (M.M.); (M.H.)
| | - Firas Kobeissy
- Program for Neurotrauma, Neuroproteomics & Biomarkers Research, Departments of Emergency Medicine, Psychiatry, Neuroscience and Chemistry, University of Florida, Gainesville, FL 32611, USA;
- Department of Biochemistry and Molecular Biology, American University of Beirut, Beirut 11-0236, Lebanon
| | - Omid Bazgir
- Modeling and Simulation/Clinical Pharmacology, Genentech, CA 94080, USA;
| | - Hassan El-Fawal
- Institute of Global Health and Human Ecology (IGHHE), The American University in Cairo, New Cairo 11835, Egypt; (H.M.A.); (S.S.); (H.E.-F.)
| | - Hassan M. E. Azzazy
- Department of Chemistry, The American University in Cairo, New Cairo 11835, Egypt;
| | - Anwar Abdelnaser
- Institute of Global Health and Human Ecology (IGHHE), The American University in Cairo, New Cairo 11835, Egypt; (H.M.A.); (S.S.); (H.E.-F.)
| |
Collapse
|
4
|
Barghout SH, Aman A, Nouri K, Blatman Z, Arevalo K, Thomas GE, MacLean N, Hurren R, Ketela T, Saini M, Abohawya M, Kiyota T, Al-Awar R, Schimmer AD. A genome-wide CRISPR/Cas9 screen in acute myeloid leukemia cells identifies regulators of TAK-243 sensitivity. JCI Insight 2021; 6:141518. [PMID: 33476303 PMCID: PMC8021101 DOI: 10.1172/jci.insight.141518] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 01/20/2021] [Indexed: 02/06/2023] Open
Abstract
TAK-243 is a first-in-class inhibitor of ubiquitin-like modifier activating enzyme 1 that catalyzes ubiquitin activation, the first step in the ubiquitylation cascade. Based on its preclinical efficacy and tolerability, TAK-243 has been advanced to phase I clinical trials in advanced malignancies. Nonetheless, the determinants of TAK-243 sensitivity remain largely unknown. Here, we conducted a genome-wide CRISPR/Cas9 knockout screen in acute myeloid leukemia (AML) cells in the presence of TAK-243 to identify genes essential for TAK-243 action. We identified BEN domain-containing protein 3 (BEND3), a transcriptional repressor and a regulator of chromatin organization, as the top gene whose knockout confers resistance to TAK-243 in vitro and in vivo. Knockout of BEND3 dampened TAK-243 effects on ubiquitylation, proteotoxic stress, and DNA damage response. BEND3 knockout upregulated the ATP-binding cassette efflux transporter breast cancer resistance protein (BCRP; ABCG2) and reduced the intracellular levelsof TAK-243. TAK-243 sensitivity correlated with BCRP expression in cancer cell lines of different origins. Moreover, chemical inhibition and genetic knockdown of BCRP sensitized intrinsically resistant high-BCRP cells to TAK-243. Thus, our data demonstrate that BEND3 regulates the expression of BCRP for which TAK-243 is a substrate. Moreover, BCRP expression could serve as a predictor of TAK-243 sensitivity.
Collapse
Affiliation(s)
- Samir H Barghout
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.,Department of Medical Biophysics, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada.,Department of Pharmacology & Toxicology, Faculty of Pharmacy, Tanta University, Tanta, Egypt
| | - Ahmed Aman
- Drug Discovery Program, Ontario Institute for Cancer Research, Toronto, Ontario, Canada.,Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, Ontario, Canada
| | - Kazem Nouri
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Zachary Blatman
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.,Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Karen Arevalo
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.,Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Geethu E Thomas
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Neil MacLean
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Rose Hurren
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Troy Ketela
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Mehakpreet Saini
- Drug Discovery Program, Ontario Institute for Cancer Research, Toronto, Ontario, Canada
| | - Moustafa Abohawya
- Department of Biomedical Sciences, Zewail City of Science, Technology and Innovation, Giza, Egypt
| | - Taira Kiyota
- Drug Discovery Program, Ontario Institute for Cancer Research, Toronto, Ontario, Canada
| | - Rima Al-Awar
- Drug Discovery Program, Ontario Institute for Cancer Research, Toronto, Ontario, Canada.,Department of Pharmacology & Toxicology, University of Toronto, Toronto, Ontario, Canada
| | - Aaron D Schimmer
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.,Department of Medical Biophysics, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada.,Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| |
Collapse
|
5
|
Barghout SH, Aman A, Blatman Z, Arevalo K, Thomas G, MacLean N, Wang X, Hurren R, Ketela T, Abohawya M, Kiyota T, Al-Awar R, Schimmer AD. Abstract 6321: BEND3 modulates sensitivity to the UBA1 inhibitor TAK-243 by regulating expression of the multidrug transporter BCRP. Cancer Res 2020. [DOI: 10.1158/1538-7445.am2020-6321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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]
Abstract
Abstract
TAK-243 (MLN7243) is a first-in-class inhibitor of the ubiquitin-activating enzyme (UBA1) that catalyzes the first step in the ubiquitylation cascade whereby proteins are tagged with mono- or poly-ubiquitin to induce their degradation or modify their functions. Based on its preclinical efficacy and tolerability, TAK-243 has entered phase 1 clinical trials in advanced malignancies. However, the determinants of sensitivity to TAK-243 remain largely unknown. Therefore, we conducted a positive-selection, genome-wide CRISPR/Cas9 knockout screen in OCI-AML2 cells followed by selection with lethal TAK-243 concentrations to identify genes essential for TAK-243 action. We identified BEN domain-containing protein 3 (BEND3), a transcriptional repressor and a regulator of chromatin organization, as the top gene whose knockout conferred resistance to TAK-243 (FDR = 0.0012). BEND3-targeting gRNAs were enriched up to 10,000-fold after selection with the drug. To validate the screen results, we independently knocked out BEND3 in OCI-AML2 cells and confirmed the resistance phenotype. In vivo, tumors of BEND3-knockout cells were resistant to TAK243 (20 mg/kg twice weekly) as opposed to control tumors that showed dramatic reductions in tumor growth rate. As assessed by immunoblotting, BEND3 knockout dampened TAK-243 effects on ubiquitylation, proteotoxic stress and DNA damage response. Mechanistically, BEND3 knockout upregulated the ABC efflux transporter breast cancer resistance protein (BCRP; ABCG2), and decreased intracellular levels of TAK-243. It also conferred partial cross-resistance to pevonedistat and TAK-981–related selective inhibitors of the NEDD8-activating enzyme (NAE) and the SUMO-activating enzyme (SAE), respectively, as well as known substrates of BCRP (mitoxantrone and doxorubicin). Finally, TAK-243 sensitivity strongly correlated with BCRP expression in a panel of 30 cancer cell lines of different origin, and chemical inhibition of BCRP but not P-gp sensitized intrinsically resistant high-BCRP cells to TAK-243. Thus, our data demonstrate that BEND3 regulates the expression of BCRP for which TAK-243 is a substrate. Moreover, BCRP expression could serve as a predictor of TAK-243 sensitivity.
Citation Format: Samir H. Barghout, Ahmed Aman, Zachary Blatman, Karen Arevalo, Geethu Thomas, Neil MacLean, Xiaoming Wang, Rose Hurren, Troy Ketela, Moustafa Abohawya, Taira Kiyota, Rima Al-Awar, Aaron D. Schimmer. BEND3 modulates sensitivity to the UBA1 inhibitor TAK-243 by regulating expression of the multidrug transporter BCRP [abstract]. In: Proceedings of the Annual Meeting of the American Association for Cancer Research 2020; 2020 Apr 27-28 and Jun 22-24. Philadelphia (PA): AACR; Cancer Res 2020;80(16 Suppl):Abstract nr 6321.
Collapse
Affiliation(s)
- Samir H. Barghout
- 1University Health Network & University of Toronto, Toronto, Ontario, Canada
| | - Ahmed Aman
- 2Ontario Institute for Cancer Research & University of Toronto, Toronto, Ontario, Canada
| | - Zachary Blatman
- 1University Health Network & University of Toronto, Toronto, Ontario, Canada
| | - Karen Arevalo
- 1University Health Network & University of Toronto, Toronto, Ontario, Canada
| | - Geethu Thomas
- 3University Health Network, Toronto, Ontario, Canada
| | - Neil MacLean
- 3University Health Network, Toronto, Ontario, Canada
| | - Xiaoming Wang
- 3University Health Network, Toronto, Ontario, Canada
| | - Rose Hurren
- 3University Health Network, Toronto, Ontario, Canada
| | - Troy Ketela
- 3University Health Network, Toronto, Ontario, Canada
| | | | - Taira Kiyota
- 5Ontario Institute for Cancer Research, Toronto, Ontario, Canada
| | - Rima Al-Awar
- 2Ontario Institute for Cancer Research & University of Toronto, Toronto, Ontario, Canada
| | - Aaron D. Schimmer
- 1University Health Network & University of Toronto, Toronto, Ontario, Canada
| |
Collapse
|