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Khozooei S, Veerappan S, Bonzheim I, Singer S, Gani C, Toulany M. Fisetin overcomes non-targetability of mutated KRAS induced YB-1 signaling in colorectal cancer cells and improves radiosensitivity by blocking repair of radiation-induced DNA double-strand breaks. Radiother Oncol 2023; 188:109867. [PMID: 37634766 DOI: 10.1016/j.radonc.2023.109867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 07/20/2023] [Accepted: 08/20/2023] [Indexed: 08/29/2023]
Abstract
BACKGROUND AND PURPOSE KRAS is frequently mutated, and the Y-box binding protein 1 (YB-1) is overexpressed in colorectal cancer (CRC). Mutant KRAS (KRASmut) stimulates YB-1 through MAPK/RSK and PI3K/AKT, independent of epidermal growth factor receptor (EGFR). The p21-activated kinase (PAK) family is a switch-site upstream of AKT and RSK. The flavonoid compound fisetin inhibits RSK-mediated YB-1 signaling. We sought the most effective molecular targeting approach that interferes with DNA double strand break (DSB) repair and induces radiosensitivity of CRC cells, independent of KRAS mutation status. MATERIALS AND METHODS KRAS activity and KRAS mutation were analyzed by Ras-GTP assay and NGS. Effect of dual targeting of RSK and AKT (DT), the effect of fisetin as well as targeting PAK by FRAX486 and EGFR by erlotinib on YB-1 activity was tested by Western blotting after irradiation in vitro and ex vivo. Additionally, the effect of DT and FRAX486 on DSB repair pathways was tested in cells expressing reporter constructs for the DSB repair pathways by flow cytometry analysis. Residual DSBs and clonogenicity were examined by γH2AX- and clonogenic assays, respectively. RESULTS Erlotinib neither blocked DSB repair nor inhibited YB-1 phosphorylation under KRAS mutation condition in vitro and ex vivo. DT and FRAX486 effectively inhibited YB-1 phosphorylation independent of KRAS mutation status and diminished homologous recombination (HR) and alternative non-homologous end joining (NHEJ) repair. DT and FRAX486 inhibited DSB repair in CaCo2 but not in isogenic KRASG12V cells. Fisetin inhibited YB-1 phosphorylation, blocked DSB repair and increased radiosensitivity, independent of KRAS mutation status. CONCLUSION Combination of fisetin with radiotherapy may improve CRC radiation response, regardless of KRASmut status.
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Affiliation(s)
- Shayan Khozooei
- Department of Radiation Oncology, University Hospital Tübingen, Tübingen, Germany
| | - Soundaram Veerappan
- Department of Radiation Oncology, University Hospital Tübingen, Tübingen, Germany
| | - Irina Bonzheim
- Department of Pathology and Neuropathology, University Hospital Tuebingen, Tuebingen, Germany
| | - Stephan Singer
- Department of Pathology and Neuropathology, University Hospital Tuebingen, Tuebingen, Germany
| | - Cihan Gani
- Department of Radiation Oncology, University Hospital Tübingen, Tübingen, Germany
| | - Mahmoud Toulany
- Department of Radiation Oncology, University Hospital Tübingen, Tübingen, Germany.
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2
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Koutsougianni F, Alexopoulou D, Uvez A, Lamprianidou A, Sereti E, Tsimplouli C, Ilkay Armutak E, Dimas K. P90 ribosomal S6 kinases: A bona fide target for novel targeted anticancer therapies? Biochem Pharmacol 2023; 210:115488. [PMID: 36889445 DOI: 10.1016/j.bcp.2023.115488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 02/28/2023] [Accepted: 03/01/2023] [Indexed: 03/08/2023]
Abstract
The 90 kDa ribosomal S6 kinase (RSK) family of proteins is a group of highly conserved Ser/Thr kinases. They are downstream effectors of the Ras/ERK/MAPK signaling cascade. ERK1/2 activation directly results in the phosphorylation of RSKs, which further, through interaction with a variety of different downstream substrates, activate various signaling events. In this context, they have been shown to mediate diverse cellular processes like cell survival, growth, proliferation, EMT, invasion, and metastasis. Interestingly, increased expression of RSKs has also been demonstrated in various cancers, such as breast, prostate, and lung cancer. This review aims to present the most recent advances in the field of RSK signaling that have occurred, such as biological insights, function, and mechanisms associated with carcinogenesis. We additionally present and discuss the recent advances but also the limitations in the development of pharmacological inhibitors of RSKs, in the context of the use of these kinases as putative, more efficient targets for novel anticancer therapeutic approaches.
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Affiliation(s)
- Fani Koutsougianni
- Department of Pharmacology, Faculty of Medicine, Health Sciences School, University of Thessaly, Larissa, Greece
| | - Dimitra Alexopoulou
- Department of Pharmacology, Faculty of Medicine, Health Sciences School, University of Thessaly, Larissa, Greece
| | - Ayca Uvez
- Department of Histology and Embryology, Faculty of Veterinary Medicine, Istanbul University-Cerrahpasa, 34500 Istanbul, Turkey
| | - Andromachi Lamprianidou
- Department of Pharmacology, Faculty of Medicine, Health Sciences School, University of Thessaly, Larissa, Greece
| | - Evangelia Sereti
- Dept of Translational Medicine, Medical Faculty, Lund University and Center for Molecular Pathology, Skäne University Hospital, Jan Waldenströms gata 59, SE 205 02 Malmö, Sweden
| | - Chrisiida Tsimplouli
- Department of Pharmacology, Faculty of Medicine, Health Sciences School, University of Thessaly, Larissa, Greece
| | - Elif Ilkay Armutak
- Department of Histology and Embryology, Faculty of Veterinary Medicine, Istanbul University-Cerrahpasa, 34500 Istanbul, Turkey
| | - Konstantinos Dimas
- Department of Pharmacology, Faculty of Medicine, Health Sciences School, University of Thessaly, Larissa, Greece.
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3
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Sun Y, Tang L, Wu C, Wang J, Wang C. RSK inhibitors as potential anticancer agents: Discovery, optimization, and challenges. Eur J Med Chem 2023; 251:115229. [PMID: 36898330 DOI: 10.1016/j.ejmech.2023.115229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 02/19/2023] [Accepted: 02/20/2023] [Indexed: 02/27/2023]
Abstract
Ribosomal S6 kinase (RSK) family is a group of serine/threonine kinases, including four isoforms (RSK1/2/3/4). As a downstream effector of the Ras-mitogen-activated protein kinase (Ras-MAPK) pathway, RSK participates in many physiological activities such as cell growth, proliferation, and migration, and is intimately involved in tumor occurrence and development. As a result, it is recognized as a potential target for anti-cancer and anti-resistance therapies. There have been several RSK inhibitors discovered or designed in recent decades, but only two have entered clinical trials. Low specificity, low selectivity, and poor pharmacokinetic properties in vivo limit their clinical translation. Published studies performed structure optimization by increasing interaction with RSK, avoiding hydrolysis of pharmacophores, eliminating chirality, adapting to binding site shape, and becoming prodrugs. Besides enhancing efficacy, the focus of further design will move towards selectivity since there are functional differences among RSK isoforms. This review summarized the types of cancers associated with RSK, along with the structural characteristics and optimization process of the reported RSK inhibitors. Furthermore, we addressed the importance of RSK inhibitors' selectivity and discussed future drug development directions. This review is expected to shed light on the emergence of RSK inhibitors with high potency, specificity, and selectivity.
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Affiliation(s)
- Ying Sun
- Department of Respiratory and Critical Care Medicine, Targeted Tracer Research and Development Laboratory, Institute of Respiratory Health, Frontiers Science Center for Disease-related Molecular Network, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China; State Key Laboratory of Biotherapy and Cancer Center, Department of Respiratory and Critical Care Medicine, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China; Precision Medicine Key Laboratory of Sichuan Province & Precision Medicine Research Center, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Lichao Tang
- Department of Biomedical Engineering, McCormick School of Engineering, Northwestern University, Evanston, 60208, IL, United States
| | - Chengyong Wu
- Department of Respiratory and Critical Care Medicine, Targeted Tracer Research and Development Laboratory, Institute of Respiratory Health, Frontiers Science Center for Disease-related Molecular Network, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China; Precision Medicine Key Laboratory of Sichuan Province & Precision Medicine Research Center, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Jiaxing Wang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, 38163, Tennessee, United States
| | - Chengdi Wang
- Department of Respiratory and Critical Care Medicine, Targeted Tracer Research and Development Laboratory, Institute of Respiratory Health, Frontiers Science Center for Disease-related Molecular Network, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China.
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4
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Alkrekshi A, Wang W, Rana PS, Markovic V, Sossey-Alaoui K. A comprehensive review of the functions of YB-1 in cancer stemness, metastasis and drug resistance. Cell Signal 2021; 85:110073. [PMID: 34224843 DOI: 10.1016/j.cellsig.2021.110073] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 06/28/2021] [Accepted: 06/30/2021] [Indexed: 12/31/2022]
Abstract
The Y Box binding protein 1 (YB-1) is a member of the highly conserved Cold Shock Domain protein family with multifunctional properties both in the cytoplasm and inside the nucleus. YB-1 is also involved in various cellular functions, including regulation of transcription, mRNA stability, and splicing. Recent studies have associated YB-1 with the regulation of the malignant phenotypes in several tumor types. In this review article, we provide an in-depth and expansive review of the literature pertaining to the multiple physiological functions of YB-1. We will also review the role of YB-1 in cancer development, progression, metastasis, and drug resistance in various malignancies, with more weight on literature published in the last decade. The methodology included querying databases PubMed, Embase, and Google Scholar for Y box binding protein 1, YB-1, YBX1, and Y-box-1.
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Affiliation(s)
- Akram Alkrekshi
- Department of Molecular Medicine, School of Medicine, Case Western Reserve University, Cleveland, Ohio, USA.; MetroHealth Medical Center, Rammelkamp Center for Research, R457, 2500 MetroHealth Drive, Cleveland, OH 44109, USA
| | - Wei Wang
- Department of Molecular Medicine, School of Medicine, Case Western Reserve University, Cleveland, Ohio, USA.; MetroHealth Medical Center, Rammelkamp Center for Research, R457, 2500 MetroHealth Drive, Cleveland, OH 44109, USA
| | - Priyanka Shailendra Rana
- Department of Molecular Medicine, School of Medicine, Case Western Reserve University, Cleveland, Ohio, USA.; MetroHealth Medical Center, Rammelkamp Center for Research, R457, 2500 MetroHealth Drive, Cleveland, OH 44109, USA
| | - Vesna Markovic
- MetroHealth Medical Center, Rammelkamp Center for Research, R457, 2500 MetroHealth Drive, Cleveland, OH 44109, USA
| | - Khalid Sossey-Alaoui
- Department of Molecular Medicine, School of Medicine, Case Western Reserve University, Cleveland, Ohio, USA.; MetroHealth Medical Center, Rammelkamp Center for Research, R457, 2500 MetroHealth Drive, Cleveland, OH 44109, USA; Case Comprehensive Cancer Center, Cleveland, OH, USA.
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5
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Lettau K, Khozooei S, Kosnopfel C, Zips D, Schittek B, Toulany M. Targeting the Y-box Binding Protein-1 Axis to Overcome Radiochemotherapy Resistance in Solid Tumors. Int J Radiat Oncol Biol Phys 2021; 111:1072-1087. [PMID: 34166770 DOI: 10.1016/j.ijrobp.2021.06.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 06/07/2021] [Accepted: 06/10/2021] [Indexed: 12/18/2022]
Abstract
Multifunctional Y-box binding protein-1 (YB-1) is highly expressed in different human solid tumors and is involved in various cellular processes. DNA damage is the major mechanism by which radiochemotherapy (RCT) induces cell death. On induction of DNA damage, a multicomponent signal transduction network, known as the DNA damage response, is activated to induce cell cycle arrest and initiate DNA repair, which protects cells against damage. YB-1 regulates nearly all cancer hallmarks described to date by participating in DNA damage response, gene transcription, mRNA splicing, translation, and tumor stemness. YB-1 lacks kinase activity, and p90 ribosomal S6 kinase and AKT are the key kinases within the RAS/mitogen-activated protein kinase and phosphoinositide 3-kinase pathways that directly activate YB-1. Thus, the molecular targeting of ribosomal S6 kinase and AKT is thought to be the most effective strategy for blocking the cellular function of YB-1 in human solid tumors. In this review, after describing the prosurvival effect of YB-1 with a focus on DNA damage repair and cancer cell stemness, clinical evidence will be provided indicating an inverse correlation between YB-1 expression and the treatment outcome of solid tumors after RCT. In the interest of being concise, YB-1 signaling cascades will be briefly discussed and the current literature on YB-1 posttranslational modifications will be summarized. Finally, the current status of targeting the YB-1 axis, especially in combination with RCT, will be highlighted.
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Affiliation(s)
- Konstanze Lettau
- Division of Radiobiology and Molecular Environmental Research, Department of Radiation Oncology, University of Tübingen, Tübingen Germany; German Cancer Consortium (DKTK), partner site Tübingen, and German Cancer Research Center (DKFZ) Heidelberg, Germany
| | - Shayan Khozooei
- Division of Radiobiology and Molecular Environmental Research, Department of Radiation Oncology, University of Tübingen, Tübingen Germany; German Cancer Consortium (DKTK), partner site Tübingen, and German Cancer Research Center (DKFZ) Heidelberg, Germany
| | - Corinna Kosnopfel
- Department of Dermatology, University Hospital Würzburg, Würzburg, Germany
| | - Daniel Zips
- Division of Radiobiology and Molecular Environmental Research, Department of Radiation Oncology, University of Tübingen, Tübingen Germany; German Cancer Consortium (DKTK), partner site Tübingen, and German Cancer Research Center (DKFZ) Heidelberg, Germany
| | - Birgit Schittek
- Department of Dermatology, Division of Dermatooncology, Eberhard-Karls-Universität, Tübingen, Tübingen, Germany
| | - Mahmoud Toulany
- Division of Radiobiology and Molecular Environmental Research, Department of Radiation Oncology, University of Tübingen, Tübingen Germany; German Cancer Consortium (DKTK), partner site Tübingen, and German Cancer Research Center (DKFZ) Heidelberg, Germany.
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6
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Tailor D, Resendez A, Garcia-Marques FJ, Pandrala M, Going CC, Bermudez A, Kumar V, Rafat M, Nambiar DK, Honkala A, Le QT, Sledge GW, Graves E, Pitteri SJ, Malhotra SV. Y box binding protein 1 inhibition as a targeted therapy for ovarian cancer. Cell Chem Biol 2021; 28:1206-1220.e6. [PMID: 33713600 DOI: 10.1016/j.chembiol.2021.02.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 12/29/2020] [Accepted: 02/17/2021] [Indexed: 12/15/2022]
Abstract
Y box binding protein 1 (YB-1) is a multifunctional protein associated with tumor progression and the emergence of treatment resistance (TR). Here, we report an azopodophyllotoxin small molecule, SU056, that potently inhibits tumor growth and progression via YB-1 inhibition. This YB-1 inhibitor inhibits cell proliferation, resistance to apoptosis in ovarian cancer (OC) cells, and arrests in the G1 phase. Inhibitor treatment leads to enrichment of proteins associated with apoptosis and RNA degradation pathways while downregulating spliceosome pathway. In vivo, SU056 independently restrains OC progression and exerts a synergistic effect with paclitaxel to further reduce disease progression with no observable liver toxicity. Moreover, in vitro mechanistic studies showed delayed disease progression via inhibition of drug efflux and multidrug resistance 1, and significantly lower neurotoxicity as compared with etoposide. These data suggest that YB-1 inhibition may be an effective strategy to reduce OC progression, antagonize TR, and decrease patient mortality.
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Affiliation(s)
- Dhanir Tailor
- Department of Radiation Oncology, Stanford University School of Medicine, Palo Alto, CA 94304, USA; Department of Radiology, Canary Center at Stanford for Cancer Early Detection, Stanford University School of Medicine, Palo Alto, CA 94304, USA; Department of Cell, Development and Cancer Biology, Knight Cancer Institute, Oregon Health & Science University, Portland, OR 97201, USA
| | - Angel Resendez
- Department of Radiation Oncology, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Fernando Jose Garcia-Marques
- Department of Radiology, Canary Center at Stanford for Cancer Early Detection, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Mallesh Pandrala
- Department of Radiation Oncology, Stanford University School of Medicine, Palo Alto, CA 94304, USA; Department of Radiology, Canary Center at Stanford for Cancer Early Detection, Stanford University School of Medicine, Palo Alto, CA 94304, USA; Department of Cell, Development and Cancer Biology, Knight Cancer Institute, Oregon Health & Science University, Portland, OR 97201, USA
| | - Catherine C Going
- Department of Radiology, Canary Center at Stanford for Cancer Early Detection, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Abel Bermudez
- Department of Radiology, Canary Center at Stanford for Cancer Early Detection, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Vineet Kumar
- Department of Radiation Oncology, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Marjan Rafat
- Department of Radiation Oncology, Stanford University School of Medicine, Palo Alto, CA 94304, USA; Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN 37212, USA
| | - Dhanya K Nambiar
- Department of Radiation Oncology, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Alexander Honkala
- Department of Radiation Oncology, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Quynh-Thu Le
- Department of Radiation Oncology, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - George W Sledge
- Department of Medicine, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Edward Graves
- Department of Radiation Oncology, Stanford University School of Medicine, Palo Alto, CA 94304, USA; Department of Radiology, Canary Center at Stanford for Cancer Early Detection, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Sharon J Pitteri
- Department of Radiology, Canary Center at Stanford for Cancer Early Detection, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Sanjay V Malhotra
- Department of Radiation Oncology, Stanford University School of Medicine, Palo Alto, CA 94304, USA; Department of Radiology, Canary Center at Stanford for Cancer Early Detection, Stanford University School of Medicine, Palo Alto, CA 94304, USA; Department of Cell, Development and Cancer Biology, Knight Cancer Institute, Oregon Health & Science University, Portland, OR 97201, USA; Center for Experimental Therapeutics, Knight Cancer Institute, Oregon Health & Science University, Portland, OR 97201, USA.
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7
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Lemos C, Schulze VK, Baumgart SJ, Nevedomskaya E, Heinrich T, Lefranc J, Bader B, Christ CD, Briem H, Kuhnke LP, Holton SJ, Bömer U, Lienau P, von Nussbaum F, Nising CF, Bauser M, Hägebarth A, Mumberg D, Haendler B. The potent AMPK inhibitor BAY-3827 shows strong efficacy in androgen-dependent prostate cancer models. Cell Oncol (Dordr) 2021; 44:581-594. [PMID: 33492659 DOI: 10.1007/s13402-020-00584-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/16/2020] [Indexed: 12/14/2022] Open
Abstract
PURPOSE 5' adenosine monophosphate-activated kinase (AMPK) is an essential regulator of cellular energy homeostasis and has been associated with different pathologies, including cancer. Precisely defining the biological role of AMPK necessitates the availability of a potent and selective inhibitor. METHODS High-throughput screening and chemical optimization were performed to identify a novel AMPK inhibitor. Cell proliferation and mechanistic assays, as well as gene expression analysis and chromatin immunoprecipitation were used to investigate the cellular impact as well as the crosstalk between lipid metabolism and androgen signaling in prostate cancer models. Also, fatty acid turnover was determined by examining lipid droplet formation. RESULTS We identified BAY-3827 as a novel and potent AMPK inhibitor with additional activity against ribosomal 6 kinase (RSK) family members. It displays strong anti-proliferative effects in androgen-dependent prostate cancer cell lines. Analysis of genes involved in AMPK signaling revealed that the expression of those encoding 3-hydroxy-3-methyl-glutaryl-coenzyme A reductase (HMGCR), fatty acid synthase (FASN) and 6-phosphofructo-2-kinase/fructose-2,6-biphosphatase 2 (PFKFB2), all of which are involved in lipid metabolism, was strongly upregulated by androgen in responsive models. Chromatin immunoprecipitation DNA-sequencing (ChIP-seq) analysis identified several androgen receptor (AR) binding peaks in the HMGCR and PFKFB2 genes. BAY-3827 strongly down-regulated the expression of lipase E (LIPE), cAMP-dependent protein kinase type II-beta regulatory subunit (PRKAR2B) and serine-threonine kinase AKT3 in responsive prostate cancer cell lines. Also, the expression of members of the carnitine palmitoyl-transferase 1 (CPT1) family was inhibited by BAY-3827, and this was paralleled by impaired lipid flux. CONCLUSIONS The availability of the potent inhibitor BAY-3827 will contribute to a better understanding of the role of AMPK signaling in cancer, especially in prostate cancer.
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Affiliation(s)
- Clara Lemos
- Bayer AG, Research and Development, Pharmaceuticals, Berlin, Germany
| | - Volker K Schulze
- Bayer AG, Research and Development, Pharmaceuticals, Berlin, Germany
| | - Simon J Baumgart
- Bayer AG, Research and Development, Pharmaceuticals, Berlin, Germany.,Bayer US LLC, Cambridge, MA, USA
| | | | - Tobias Heinrich
- Bayer AG, Research and Development, Pharmaceuticals, Berlin, Germany
| | - Julien Lefranc
- Bayer AG, Research and Development, Pharmaceuticals, Berlin, Germany.,Nuvisan Innovation Campus Berlin, Berlin, Germany
| | - Benjamin Bader
- Bayer AG, Research and Development, Pharmaceuticals, Berlin, Germany.,Nuvisan Innovation Campus Berlin, Berlin, Germany
| | - Clara D Christ
- Bayer AG, Research and Development, Pharmaceuticals, Berlin, Germany
| | - Hans Briem
- Bayer AG, Research and Development, Pharmaceuticals, Berlin, Germany
| | - Lara P Kuhnke
- Bayer AG, Research and Development, Pharmaceuticals, Berlin, Germany
| | - Simon J Holton
- Bayer AG, Research and Development, Pharmaceuticals, Berlin, Germany.,Nuvisan Innovation Campus Berlin, Berlin, Germany
| | - Ulf Bömer
- Bayer AG, Research and Development, Pharmaceuticals, Berlin, Germany.,Nuvisan Innovation Campus Berlin, Berlin, Germany
| | - Philip Lienau
- Bayer AG, Research and Development, Pharmaceuticals, Berlin, Germany
| | - Franz von Nussbaum
- Bayer AG, Research and Development, Pharmaceuticals, Berlin, Germany.,Nuvisan Innovation Campus Berlin, Berlin, Germany
| | - Carl F Nising
- Bayer AG, Research and Development, Pharmaceuticals, Berlin, Germany
| | - Marcus Bauser
- Bayer AG, Research and Development, Pharmaceuticals, Berlin, Germany.,Janssen Pharmaceuticals, Beerse, Belgium
| | - Andrea Hägebarth
- Bayer AG, Research and Development, Pharmaceuticals, Berlin, Germany
| | - Dominik Mumberg
- Bayer AG, Research and Development, Pharmaceuticals, Berlin, Germany
| | - Bernard Haendler
- Bayer AG, Research and Development, Pharmaceuticals, Berlin, Germany.
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8
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Shiota M, Sekino Y, Tsukahara S, Abe T, Kinoshita F, Imada K, Ueda S, Ushijima M, Nagakawa S, Matsumoto T, Kashiwagi E, Takeuchi A, Inokuchi J, Uchiumi T, Oda Y, Eto M. Gene amplification of YB-1 in castration-resistant prostate cancer in association with aberrant androgen receptor expression. Cancer Sci 2020; 112:323-330. [PMID: 33064355 PMCID: PMC7780013 DOI: 10.1111/cas.14695] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 10/07/2020] [Accepted: 10/13/2020] [Indexed: 11/29/2022] Open
Abstract
Although Y‐box binding protein‐1 (YB‐1) is known to be overexpressed in prostate cancer, especially castration‐resistant prostate cancer (CRPC), the mechanism of its overexpression remains unclear. We aimed to elucidate the mechanism of YB‐1 overexpression in CRPC. Gene amplification in CRPC cells and tissues was examined by public database analysis, and digital PCR. The significance of YB‐1 amplification for the YB‐1/androgen receptor (AR) axis and prognosis was examined by public database analysis and immunohistochemistry. YB‐1 amplification was mainly observed in CRPC tissues by public database analysis and confirmed in CRPC cells and tissues by digital PCR. Expression of YB‐1 was increased in CRPC tissues compared with treatment‐naïve tissues. Furthermore, YB‐1 and phosphorylated YB‐1 levels were associated with AR and AR V7 expression levels. Finally, YB‐1 amplification was associated with poor outcomes in CRPC. Taken together, the present findings suggest that YB‐1 amplification contributes to progression to CRPC through regulation of AR and AR V7 expressions, and that YB‐1 is a promising therapeutic target in CRPC.
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Affiliation(s)
- Masaki Shiota
- Department of Urology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Yohei Sekino
- Department of Urology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Shigehiro Tsukahara
- Department of Urology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.,Department of Clinical Chemistry and Laboratory Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Tatsuro Abe
- Department of Urology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.,Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Fumio Kinoshita
- Department of Urology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.,Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Kenjiro Imada
- Department of Urology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Shohei Ueda
- Department of Urology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Miho Ushijima
- Department of Urology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Shohei Nagakawa
- Department of Urology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Takashi Matsumoto
- Department of Urology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Eiji Kashiwagi
- Department of Urology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Ario Takeuchi
- Department of Urology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Junichi Inokuchi
- Department of Urology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Takeshi Uchiumi
- Department of Clinical Chemistry and Laboratory Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Yoshinao Oda
- Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masatoshi Eto
- Department of Urology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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9
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Johnson TG, Schelch K, Mehta S, Burgess A, Reid G. Why Be One Protein When You Can Affect Many? The Multiple Roles of YB-1 in Lung Cancer and Mesothelioma. Front Cell Dev Biol 2019; 7:221. [PMID: 31632972 PMCID: PMC6781797 DOI: 10.3389/fcell.2019.00221] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 09/18/2019] [Indexed: 12/14/2022] Open
Abstract
Lung cancers and malignant pleural mesothelioma (MPM) have some of the worst 5-year survival rates of all cancer types, primarily due to a lack of effective treatment options for most patients. Targeted therapies have shown some promise in thoracic cancers, although efficacy is limited only to patients harboring specific mutations or target expression. Although a number of actionable mutations have now been identified, a large population of thoracic cancer patients have no therapeutic options outside of first-line chemotherapy. It is therefore crucial to identify alternative targets that might lead to the development of new ways of treating patients diagnosed with these diseases. The multifunctional oncoprotein Y-box binding protein-1 (YB-1) could serve as one such target. Recent studies also link this protein to many inherent behaviors of thoracic cancer cells such as proliferation, invasion, metastasis and involvement in cancer stem-like cells. Here, we review the regulation of YB-1 at the transcriptional, translational, post-translational and sub-cellular levels in thoracic cancer and discuss its potential use as a biomarker and therapeutic target.
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Affiliation(s)
- Thomas G Johnson
- Asbestos Diseases Research Institute, Sydney, NSW, Australia.,Cell Division Laboratory, The ANZAC Research Institute, Sydney, NSW, Australia.,School of Medicine, The University of Sydney, Sydney, NSW, Australia.,Sydney Catalyst Translational Cancer Research Centre, The University of Sydney, Sydney, NSW, Australia
| | - Karin Schelch
- Institute of Cancer Research, Medical University of Vienna, Vienna, Austria
| | - Sunali Mehta
- Department of Pathology, University of Otago, Dunedin, New Zealand.,Maurice Wilkins Centre, University of Otago, Dunedin, New Zealand
| | - Andrew Burgess
- Cell Division Laboratory, The ANZAC Research Institute, Sydney, NSW, Australia.,School of Medicine, The University of Sydney, Sydney, NSW, Australia
| | - Glen Reid
- Department of Pathology, University of Otago, Dunedin, New Zealand.,Maurice Wilkins Centre, University of Otago, Dunedin, New Zealand
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10
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Sekino Y, Han X, Kawaguchi T, Babasaki T, Goto K, Inoue S, Hayashi T, Teishima J, Shiota M, Yasui W, Matsubara A. TUBB3 Reverses Resistance to Docetaxel and Cabazitaxel in Prostate Cancer. Int J Mol Sci 2019; 20:ijms20163936. [PMID: 31412591 PMCID: PMC6719236 DOI: 10.3390/ijms20163936] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 08/03/2019] [Accepted: 08/05/2019] [Indexed: 12/18/2022] Open
Abstract
Recent studies have reported that TUBB3 overexpression is involved in docetaxel (DTX) resistance in prostate cancer (PCa). The aim of this study was to clarify the role of TUBB3 in DTX and cabazitaxel (CBZ) resistance, and cross-resistance between DTX and CBZ in PCa. We analyzed the effect of TUBB3 knockdown on DTX and CBZ resistance and examined the interaction between TUBB3 and PTEN. We also investigated the role of phosphoinositide 3-kinases (PI3K) inhibitor (LY294002) in DTX and CBZ resistance. TUBB3 expression was upregulated in DTX-resistant and CBZ-resistant cells. TUBB3 knockdown re-sensitized DTX-resistant cells to DTX and CBZ-resistant cells to CBZ. Additionally, TUBB3 knockdown re-sensitized DTX-resistant cell lines to CBZ, indicating that TUBB3 mediates cross-resistance between DTX and CBZ. Knockdown of TUBB3 enhanced PTEN expression, and PTEN knockout enhanced TUBB3 expression. LY294002 suppressed TUBB3 expression in DTX-resistant and CBZ-resistant cell lines. LY294002 re-sensitized DTX-resistant cell lines to DTX and CBZ-resistant cell lines to CBZ. These results suggest that TUBB3 is involved in DTX resistance and CBZ resistance. A combination of LY294002/DTX and that of LY294002/CBZ could be potential strategies for PCa treatment.
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Affiliation(s)
- Yohei Sekino
- Department of Urology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8551, Japan.
| | - Xiangrui Han
- Department of Urology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8551, Japan
| | - Takafumi Kawaguchi
- Department of Urology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8551, Japan
| | - Takashi Babasaki
- Department of Urology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8551, Japan
- Department of Molecular Pathology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8551, Japan
| | - Keisuke Goto
- Department of Urology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8551, Japan
| | - Shogo Inoue
- Department of Urology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8551, Japan
| | - Tetsutaro Hayashi
- Department of Urology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8551, Japan
| | - Jun Teishima
- Department of Urology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8551, Japan
| | - Masaki Shiota
- Department of Urology, Graduate School of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan
| | - Wataru Yasui
- Department of Molecular Pathology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8551, Japan
| | - Akio Matsubara
- Department of Urology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8551, Japan
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11
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KIFC1 Inhibitor CW069 Induces Apoptosis and Reverses Resistance to Docetaxel in Prostate Cancer. J Clin Med 2019; 8:jcm8020225. [PMID: 30744126 PMCID: PMC6407017 DOI: 10.3390/jcm8020225] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 01/22/2019] [Accepted: 02/05/2019] [Indexed: 12/17/2022] Open
Abstract
Kinesin family member C1 (KIFC1) is a minus end-directed motor protein that plays an essential role in centrosome clustering. Previously, we reported that KIFC1 is involved in cancer progression in prostate cancer (PCa). We designed this study to assess the involvement of KIFC1 in docetaxel (DTX) resistance in PCa and examined the effect of KIFC1 on DTX resistance. We also analyzed the possible role of a KIFC1 inhibitor (CW069) in PCa. We used DTX-resistant PCa cell lines in DU145 and C4-2 cells to analyze the effect of KIFC1 on DTX resistance in PCa. Western blotting showed that KIFC1 expression was higher in the DTX-resistant cell lines than in the parental cell lines. Downregulation of KIFC1 re-sensitized the DTX-resistant cell lines to DTX treatment. CW069 treatment suppressed cell viability in both parental and DTX-resistant cell lines. DTX alone had little effect on cell viability in the DTX-resistant cells. However, the combination of DTX and CW069 significantly reduced cell viability in the DTX-resistant cells, indicating that CW069 re-sensitized the DTX-resistant cell lines to DTX treatment. These results suggest that a combination of CW069 and DTX could be a potential strategy to overcome DTX resistance.
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12
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Shiota M, Dejima T, Yamamoto Y, Takeuchi A, Imada K, Kashiwagi E, Inokuchi J, Tatsugami K, Kajioka S, Uchiumi T, Eto M. Collateral resistance to taxanes in enzalutamide-resistant prostate cancer through aberrant androgen receptor and its variants. Cancer Sci 2018; 109:3224-3234. [PMID: 30051622 PMCID: PMC6172053 DOI: 10.1111/cas.13751] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 06/14/2018] [Accepted: 07/22/2018] [Indexed: 01/09/2023] Open
Abstract
Currently, the optimal sequential use of androgen receptor (AR) axis-targeted agents and taxane chemotherapies remains undetermined. We aimed to elucidate the resistance status between taxanes and enzalutamide, and the functional role of the AR axis. Enzalutamide-resistant 22Rv1 cells showed collateral resistance to taxanes, including docetaxel and cabazitaxel. However, taxane-resistant cells showed no collateral resistance to enzalutamide; taxane-resistant cells expressed comparable protein levels of full-length AR and AR variants. Knockdown of both full-length AR and AR variants rendered cells sensitive to taxanes, whereas knockdown of AR variants sensitized cells to enzalutamide, but not to taxanes. In contrast, overexpression of full-length AR rendered cells resistant to taxanes. Consistently, the prostate-specific antigen response and progression-free survival in docetaxel chemotherapy were worse in cases with prior use of ARAT agents compared with cases without. Collateral resistance to taxanes was evident after obtaining enzalutamide resistance, and aberrant AR signaling might be involved in taxane resistance.
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Affiliation(s)
- Masaki Shiota
- Department of UrologyGraduate School of Medical SciencesKyushu UniversityFukuokaJapan
| | - Takashi Dejima
- Department of UrologyGraduate School of Medical SciencesKyushu UniversityFukuokaJapan
| | - Yoshiaki Yamamoto
- Department of UrologyGraduate School of MedicineYamaguchi UniversityUbeJapan
| | - Ario Takeuchi
- Department of UrologyGraduate School of Medical SciencesKyushu UniversityFukuokaJapan
| | - Kenjiro Imada
- Department of UrologyGraduate School of Medical SciencesKyushu UniversityFukuokaJapan
| | - Eiji Kashiwagi
- Department of UrologyGraduate School of Medical SciencesKyushu UniversityFukuokaJapan
| | - Junichi Inokuchi
- Department of UrologyGraduate School of Medical SciencesKyushu UniversityFukuokaJapan
| | - Katsunori Tatsugami
- Department of UrologyGraduate School of Medical SciencesKyushu UniversityFukuokaJapan
| | - Shunichi Kajioka
- Department of UrologyGraduate School of Medical SciencesKyushu UniversityFukuokaJapan
| | - Takeshi Uchiumi
- Department of Clinical Chemistry and Laboratory MedicineGraduate School of Medical SciencesKyushu UniversityFukuokaJapan
| | - Masatoshi Eto
- Department of UrologyGraduate School of Medical SciencesKyushu UniversityFukuokaJapan
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13
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Zhang C, Qie Y, Yang T, Wang L, Du E, Liu Y, Xu Y, Qiao B, Zhang Z. Kinase PIM1 promotes prostate cancer cell growth via c-Myc-RPS7-driven ribosomal stress. Carcinogenesis 2018; 40:52-60. [PMID: 30247545 DOI: 10.1093/carcin/bgy126] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 08/26/2018] [Accepted: 09/19/2018] [Indexed: 01/01/2023] Open
Affiliation(s)
- Changwen Zhang
- Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, Tianjin, China
| | - Yunkai Qie
- Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, Tianjin, China
| | - Tong Yang
- Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, Tianjin, China
| | - Li Wang
- Department of Gynaecology and Obstetrics, The Second Hospital of Tianjin Medical University, Tianjin, China
| | - E Du
- Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, Tianjin, China
| | - Yan Liu
- Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, Tianjin, China
| | - Yong Xu
- Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, Tianjin, China
| | - Baomin Qiao
- Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, Tianjin, China
| | - Zhihong Zhang
- Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin Institute of Urology, Tianjin, China
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14
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Kuenzi BM, Remsing Rix LL, Stewart PA, Fang B, Kinose F, Bryant AT, Boyle TA, Koomen JM, Haura EB, Rix U. Polypharmacology-based ceritinib repurposing using integrated functional proteomics. Nat Chem Biol 2017; 13:1222-1231. [PMID: 28991240 DOI: 10.1038/nchembio.2489] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 08/30/2017] [Indexed: 12/11/2022]
Abstract
Targeted drugs are effective when they directly inhibit strong disease drivers, but only a small fraction of diseases feature defined actionable drivers. Alternatively, network-based approaches can uncover new therapeutic opportunities. Applying an integrated phenotypic screening, chemical and phosphoproteomics strategy, here we describe the anaplastic lymphoma kinase (ALK) inhibitor ceritinib as having activity across several ALK-negative lung cancer cell lines and identify new targets and network-wide signaling effects. Combining pharmacological inhibitors and RNA interference revealed a polypharmacology mechanism involving the noncanonical targets IGF1R, FAK1, RSK1 and RSK2. Mutating the downstream signaling hub YB1 protected cells from ceritinib. Consistent with YB1 signaling being known to cause taxol resistance, combination of ceritinib with paclitaxel displayed strong synergy, particularly in cells expressing high FAK autophosphorylation, which we show to be prevalent in lung cancer. Together, we present a systems chemical biology platform for elucidating multikinase inhibitor polypharmacology mechanisms, subsequent design of synergistic drug combinations, and identification of mechanistic biomarker candidates.
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Affiliation(s)
- Brent M Kuenzi
- Department of Drug Discovery, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA.,Cancer Biology PhD Program, University of South Florida, Tampa, Florida, USA
| | - Lily L Remsing Rix
- Department of Drug Discovery, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA
| | - Paul A Stewart
- Department of Thoracic Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA
| | - Bin Fang
- Proteomics Core Facility, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA
| | - Fumi Kinose
- Department of Thoracic Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA
| | - Annamarie T Bryant
- Department of Drug Discovery, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA
| | - Theresa A Boyle
- Department of Thoracic Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA
| | - John M Koomen
- Department of Molecular Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA
| | - Eric B Haura
- Department of Thoracic Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA
| | - Uwe Rix
- Department of Drug Discovery, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA
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15
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Baumann C, Ullrich A, Torka R. GAS6-expressing and self-sustaining cancer cells in 3D spheroids activate the PDK-RSK-mTOR pathway for survival and drug resistance. Mol Oncol 2017; 11:1430-1447. [PMID: 28675785 PMCID: PMC5623821 DOI: 10.1002/1878-0261.12109] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 06/20/2017] [Accepted: 06/21/2017] [Indexed: 12/14/2022] Open
Abstract
AXL receptor tyrosine kinase (RTK) inhibition presents a promising therapeutic strategy for aggressive tumor subtypes, as AXL signaling is upregulated in many cancers resistant to first-line treatments. Furthermore, the AXL ligand growth arrest-specific gene 6 (GAS6) has recently been linked to cancer drug resistance. Here, we established that challenging conditions, such as serum deprivation, divide AXL-overexpressing tumor cell lines into non-self-sustaining and self-sustaining subtypes in 3D spheroid culture. Self-sustaining cells are characterized by excessive GAS6 secretion and TAM-PDK-RSK-mTOR pathway activation. In 3D spheroid culture, the activation of the TAM-PDK-RSK-mTOR pathway proves crucial following treatment with AXL/MET inhibitor BMS777607, when the self-sustaining tumor cells react with TAM-RSK hyperactivation and enhanced SRC-AKT-mTOR signaling. Thus, bidirectional activated mTOR leads to enhanced proliferation and counteracts the drug effect. mTOR activation is accompanied by an enhanced AXL expression and hyperphosphorylation following 24 h of treatment with BMS777607. Therefore, we elucidate a double role of AXL that can be assigned to RSK-mTOR as well as SRC-AKT-mTOR pathway activation, specifically through AXL Y779 phosphorylation. This phosphosite fuels the resistance mechanism in 3D spheroids, alongside further SRC-dependent EGFR Y1173 and/or MET Y1349 phosphorylation which is defined by the cell-specific addiction. In conclusion, self-sustenance in cancer cells is based on a signaling synergy, individually balanced between GAS6 TAM-dependent PDK-RSK-mTOR survival pathway and the AXLY779/EGFR/MET-driven SRC-mTOR pathway.
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Affiliation(s)
- Christine Baumann
- Department of Molecular BiologyMax‐Planck‐Institute of BiochemistryMartinsriedGermany
| | - Axel Ullrich
- Department of Molecular BiologyMax‐Planck‐Institute of BiochemistryMartinsriedGermany
| | - Robert Torka
- Department of Molecular BiologyMax‐Planck‐Institute of BiochemistryMartinsriedGermany,Institute of Physiological ChemistryUniversity Halle‐WittenbergHalle (Saale)Germany
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16
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Davies AH, Reipas K, Hu K, Berns R, Firmino N, Stratford AL, Dunn SE. Inhibition of RSK with the novel small-molecule inhibitor LJI308 overcomes chemoresistance by eliminating cancer stem cells. Oncotarget 2016; 6:20570-7. [PMID: 26011941 PMCID: PMC4653026 DOI: 10.18632/oncotarget.4135] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Accepted: 04/23/2015] [Indexed: 11/25/2022] Open
Abstract
The triple-negative breast cancer (TNBC) subtype is enriched in cancer stem cells (CSCs) and clinically correlated with the highest rate of recurrence. Several studies implicate the RSK pathway as being pivotal for the growth and proliferation of CSCs, which are postulated to drive tumor relapse. We now address the potential for the newly developed RSK inhibitor LJI308 to target the CSC population and repress TNBC growth and dissemination. Overexpression of the Y-box binding protein-1 (YB-1) oncogene in human mammary epithelial cells (HMECs) drove TNBC tumor formation characterized by a multi-drug resistance phenotype, yet these cells were sensitive to LJI308 in addition to the classic RSK inhibitors BI-D1870 and luteolin. Notably, LJI308 specifically targeted transformed cells as it had little effect on the non-tumorigenic parental HMECs. Loss of cell growth, both in 2D and 3D culture, was attributed to LJI308-induced apoptosis. We discovered CD44+/CD49f+ TNBC cells to be less sensitive to chemotherapy compared to the isogenic CD44-/CD49f- cells. However, inhibition of RSK using LJI308, BI-D1870, or luteolin was sufficient to eradicate the CSC population. We conclude that targeting RSK using specific and potent inhibitors, such as LJI308, delivers the promise of inhibiting the growth of TNBC.
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Affiliation(s)
- Alastair H Davies
- Department of Urological Sciences, Vancouver Prostate Centre, Vancouver, BC, Canada
| | - Kristen Reipas
- School of Medicine, Queen's University, Kingston, ON, Canada
| | - Kaiji Hu
- Department of Pediatrics, Child and Family Research Institute, University of British Columbia, Vancouver, BC, Canada
| | - Rachel Berns
- Department of Pediatrics, Child and Family Research Institute, University of British Columbia, Vancouver, BC, Canada
| | - Natalie Firmino
- Department of Pediatrics, Child and Family Research Institute, University of British Columbia, Vancouver, BC, Canada
| | - Anna L Stratford
- Department of Pediatrics, Child and Family Research Institute, University of British Columbia, Vancouver, BC, Canada
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17
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Kawahara T, Aljarah AK, Shareef HK, Inoue S, Ide H, Patterson JD, Kashiwagi E, Han B, Li Y, Zheng Y, Miyamoto H. Silodosin inhibits prostate cancer cell growth via ELK1 inactivation and enhances the cytotoxic activity of gemcitabine. Prostate 2016; 76:744-56. [PMID: 26864615 DOI: 10.1002/pros.23164] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Accepted: 01/22/2016] [Indexed: 11/06/2022]
Abstract
BACKGROUND Biological significance of ELK1, a transcriptional factor whose phosphorylation is necessary for c-fos proto-oncogene activation, in prostate cancer remains far from fully understood. In this study, we aim to investigate the role of ELK1 in tumor growth as well as the efficacy of a selective α1A-adrenergic blocker, silodosin, in ELK1 activity in prostate cancer cells. METHODS We first immunohistochemically determined the levels of phospho-ELK1 (p-ELK1) expression in radical prostatectomy specimens. We then assessed the effects of ELK1 knockdown via short hairpin RNA and silodosin on cell proliferation, migration, and invasion in prostate cancer lines. RESULTS The levels of p-ELK1 expression were significantly higher in carcinoma than in benign (P < 0.001) or high-grade prostatic intraepithelial neoplasia (HGPIN) (P = 0.002) as well as in HGPIN than in benign (P < 0.001). Kaplan-Meier and log-rank tests revealed that moderate-strong positivity of p-ELK1 in carcinomas tended to correlate with biochemical recurrence after radical prostatectomy (P = 0.098). In PC3 and DU145 expressing ELK1 (mRNA/protein) but no androgen receptor (AR), ELK1 silencing resulted in considerable decreases in the expression of c-fos as well as in cell migration/invasion and matrix metalloproteinase-2 expression, but not in cell viability. Silodosin treatment reduced the expression/activity of ELK1 in these cells as well as the viability of AR-positive LNCaP and C4-2 cells and the migration of both AR-positive and AR-negative cells, but not the viability of AR-negative or ELK1-negative cells. Interestingly, silodosin significantly increased sensitivity to gemcitabine, but not to cisplatin or docetaxel, even in AR-negative cells. CONCLUSIONS ELK1 is likely to be activated in prostate cancer cells and promote tumor progression. Furthermore, silodosin that inactivates ELK1 in prostate cancer cells not only inhibits their growth but also enhances the cytotoxic activity of gemcitabine. Thus, ELK1 inhibition has the potential of being a therapeutic approach for prostate cancer.
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Affiliation(s)
- Takashi Kawahara
- Departments of Pathology and Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, Rochester, New York
- Department of Urology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Ali Kadhim Aljarah
- Departments of Pathology and Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Department of Biology, University of Baghdad College of Science, Baghdad, Iraq
| | - Hasanain Khaleel Shareef
- Departments of Pathology and Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Department of Biology, University of Babylon College of Science for Women, Babylon, Iraq
| | - Satoshi Inoue
- Departments of Pathology and Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Hiroki Ide
- Departments of Pathology and Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - John D Patterson
- Departments of Pathology and Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Eiji Kashiwagi
- Departments of Pathology and Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Bin Han
- Departments of Pathology and Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Yi Li
- Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, Rochester, New York
| | - Yichun Zheng
- Departments of Pathology and Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, Rochester, New York
| | - Hiroshi Miyamoto
- Departments of Pathology and Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, Rochester, New York
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18
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Lasham A, Mehta SY, Fitzgerald SJ, Woolley AG, Hearn JI, Hurley DG, Ruza I, Algie M, Shelling AN, Braithwaite AW, Print CG. A novel EGR-1 dependent mechanism for YB-1 modulation of paclitaxel response in a triple negative breast cancer cell line. Int J Cancer 2016; 139:1157-70. [PMID: 27072400 DOI: 10.1002/ijc.30137] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 03/01/2016] [Accepted: 03/03/2016] [Indexed: 12/18/2022]
Abstract
Chemotherapy with taxanes such as paclitaxel (PTX) is a key component of triple negative breast cancer (TNBC) treatment. PTX is used in combination with other drugs in both the adjuvant setting and in advanced breast cancer. Because a proportion of patients respond poorly to PTX or relapse after its use, a greater understanding of the mechanisms conferring resistance to PTX is required. One protein shown to be involved in drug resistance is Y-box binding protein 1 (YB-1). High levels of YB-1 have previously been associated with resistance to PTX in TNBCs. In this study, we aimed to determine mechanisms by which YB-1 confers PTX resistance. We generated isogenic TNBC cell lines that differed by YB-1 levels and treated these with PTX. Using microarray analysis, we identified EGR1 as a potential target of YB-1. We found that low EGR1 mRNA levels are associated with poor breast cancer patient prognosis, and that EGR1 and YBX1 mRNA expression was inversely correlated in a TNBC line and in a proportion of TNBC tumours. Reducing the levels of EGR1 caused TNBC cells to become more resistant to PTX. Given that PTX targets cycling cells, we propose a model whereby high YB-1 levels in some TNBC cells can lead to reduced levels of EGR1, which in turn promotes slow cell cycling and resistance to PTX. Therefore YB-1 and EGR1 levels are biologically linked and may provide a biomarker for TNBC response to PTX.
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Affiliation(s)
- Annette Lasham
- Department of Molecular Medicine and Pathology, School of Medical Sciences, University of Auckland, Auckland, New Zealand.,Maurice Wilkins Centre, University of Auckland, Auckland, New Zealand
| | - Sunali Y Mehta
- Department of Molecular Medicine and Pathology, School of Medical Sciences, University of Auckland, Auckland, New Zealand.,Maurice Wilkins Centre, University of Auckland, Auckland, New Zealand
| | - Sandra J Fitzgerald
- Department of Molecular Medicine and Pathology, School of Medical Sciences, University of Auckland, Auckland, New Zealand
| | - Adele G Woolley
- Department of Pathology, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand
| | - James I Hearn
- Department of Molecular Medicine and Pathology, School of Medical Sciences, University of Auckland, Auckland, New Zealand
| | - Daniel G Hurley
- Maurice Wilkins Centre, University of Auckland, Auckland, New Zealand.,Bioinformatics Institute, University of Auckland, Auckland, New Zealand.,Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.,Systems Biology Laboratory, Melbourne School of Engineering, University of Melbourne, Melbourne, Australia
| | - Igor Ruza
- Department of Pathology, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand
| | - Michael Algie
- Department of Pathology, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand
| | - Andrew N Shelling
- Department of Obstetrics and Gynaecology, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Antony W Braithwaite
- Maurice Wilkins Centre, University of Auckland, Auckland, New Zealand.,Department of Pathology, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand
| | - Cristin G Print
- Department of Molecular Medicine and Pathology, School of Medical Sciences, University of Auckland, Auckland, New Zealand.,Maurice Wilkins Centre, University of Auckland, Auckland, New Zealand.,Bioinformatics Institute, University of Auckland, Auckland, New Zealand
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19
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Wang W, Wang HJ, Wang B, Li Y, Qin Y, Zheng LS, Zhou JS, Qu PH, Shi JH, Zhang HS. The Role of the Y Box Binding Protein 1 C-Terminal Domain in Vascular Endothelial Cell Proliferation, Apoptosis, and Angiogenesis. DNA Cell Biol 2015; 35:24-32. [PMID: 26430912 DOI: 10.1089/dna.2015.2908] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Different domains of the multifunctional transcription factor Y-box binding protein 1 (YB1) regulate proliferation, differentiation, and apoptosis by transactivating or repressing the promoters of various genes. Here we report that the C-terminal domain of YB1 (YB1 CTD) is involved in endothelial cell proliferation, apoptosis, and tube formation. The oligo pull-down assays demonstrated that YB1 directly binds double-stranded GC box sequences in endothelial cells through the 125-220 amino acids. Adenovirus expression vectors harboring green fluorescent protein (GFP) or GFP-tagged YB1 CTD were constructed and used to infect EA.hy926 endothelial cells. Overexpression of the YB1 CTD significantly increased p21 expression, decreased cyclin B1 expression, and inhibited the proliferation of EA.hy926 cells. YB1 CTD overexpression also increased Bax and active caspase 3 expression, decreased Bcl-2 expression, and induced apoptosis in EA.hy926 cells. Furthermore, overexpression of the YB1 CTD significantly suppressed migration and tube formation in EA.hy926 cells. Finally, YB1 CTD decreased ERK1/2 phosphorylation in EA.hy926 cells. These findings demonstrated vital roles for YB1 in endothelial cell proliferation, apoptosis, and tube formation through transcriptional regulation of GC box-related genes.
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Affiliation(s)
- Wei Wang
- 1 Central Laboratory, Affiliated Hospital of Hebei University , Baoding, China .,2 Department of Cardiovascular Internal Medicine, Baoding First Central Hospital , Baoding, China
| | - Hong-jie Wang
- 1 Central Laboratory, Affiliated Hospital of Hebei University , Baoding, China
| | - Bing Wang
- 1 Central Laboratory, Affiliated Hospital of Hebei University , Baoding, China
| | - Ying Li
- 3 Department of Geriatrics, Baoding Second Hospital , Baoding, China
| | - Yan Qin
- 1 Central Laboratory, Affiliated Hospital of Hebei University , Baoding, China
| | - Li-shuang Zheng
- 1 Central Laboratory, Affiliated Hospital of Hebei University , Baoding, China
| | - Jin-sa Zhou
- 4 Department of Preventive Medicine, Hebei University , Baoding, China
| | - Peng-huan Qu
- 4 Department of Preventive Medicine, Hebei University , Baoding, China
| | - Jian-hong Shi
- 1 Central Laboratory, Affiliated Hospital of Hebei University , Baoding, China
| | - Hai-song Zhang
- 5 Department of Kidney Internal Medicine, Affiliated Hospital of Hebei University , Baoding, China
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Saupe M, Rauschenberger L, Preuß M, Oswald S, Fussek S, Zimmermann U, Walther R, Knabbe C, Burchardt M, Stope MB. Differential expression of the multidrug resistance 1 (MDR1) protein in prostate cancer cells is independent from anticancer drug treatment and Y box binding protein 1 (YB-1) activity. World J Urol 2014; 33:1481-6. [DOI: 10.1007/s00345-014-1469-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Accepted: 12/18/2014] [Indexed: 01/29/2023] Open
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