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Stiegeler N, Garsed DW, Au-Yeung G, Bowtell DDL, Heinzelmann-Schwarz V, Zwimpfer TA. Homologous recombination proficient subtypes of high-grade serous ovarian cancer: treatment options for a poor prognosis group. Front Oncol 2024; 14:1387281. [PMID: 38894867 PMCID: PMC11183307 DOI: 10.3389/fonc.2024.1387281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Accepted: 05/15/2024] [Indexed: 06/21/2024] Open
Abstract
Approximately 50% of tubo-ovarian high-grade serous carcinomas (HGSCs) have functional homologous recombination-mediated (HR) DNA repair, so-called HR-proficient tumors, which are often associated with primary platinum resistance (relapse within six months after completion of first-line therapy), minimal benefit from poly(ADP-ribose) polymerase (PARP) inhibitors, and shorter survival. HR-proficient tumors comprise multiple molecular subtypes including cases with CCNE1 amplification, AKT2 amplification or CDK12 alteration, and are often characterized as "cold" tumors with fewer infiltrating lymphocytes and decreased expression of PD-1/PD-L1. Several new treatment approaches aim to manipulate these negative prognostic features and render HR-proficient tumors more susceptible to treatment. Alterations in multiple different molecules and pathways in the DNA damage response are driving new drug development to target HR-proficient cancer cells, such as inhibitors of the CDK or P13K/AKT pathways, as well as ATR inhibitors. Treatment combinations with chemotherapy or PARP inhibitors and agents targeting DNA replication stress have shown promising preclinical and clinical results. New approaches in immunotherapy are also being explored, including vaccines or antibody drug conjugates. Many approaches are still in the early stages of development and further clinical trials will determine their clinical relevance. There is a need to include HR-proficient tumors in ovarian cancer trials and to analyze them in a more targeted manner to provide further evidence for their specific therapy, as this will be crucial in improving the overall prognosis of HGSC and ovarian cancer in general.
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Affiliation(s)
| | - Dale W. Garsed
- Cancer Research, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Melbourne, VIC, Australia
| | - George Au-Yeung
- Cancer Research, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Melbourne, VIC, Australia
| | - David D. L. Bowtell
- Cancer Research, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Melbourne, VIC, Australia
| | | | - Tibor A. Zwimpfer
- Cancer Research, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
- Department of Gynecological Oncology, University Hospital Basel, Basel, Switzerland
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2
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Fu X, Li P, Zhou Q, He R, Wang G, Zhu S, Bagheri A, Kupfer G, Pei H, Li J. Mechanism of PARP inhibitor resistance and potential overcoming strategies. Genes Dis 2024; 11:306-320. [PMID: 37588193 PMCID: PMC10425807 DOI: 10.1016/j.gendis.2023.02.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 01/27/2023] [Accepted: 02/02/2023] [Indexed: 08/18/2023] Open
Abstract
PARP inhibitors (PARPi) are a kind of cancer therapy that targets poly (ADP-ribose) polymerase. PARPi is the first clinically approved drug to exert synthetic lethality by obstructing the DNA single-strand break repair process. Despite the significant therapeutic effect in patients with homologous recombination (HR) repair deficiency, innate and acquired resistance to PARPi is a main challenge in the clinic. In this review, we mainly discussed the underlying mechanisms of PARPi resistance and summarized the promising solutions to overcome PARPi resistance, aiming at extending PARPi application and improving patient outcomes.
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Affiliation(s)
- Xiaoyu Fu
- Department of Oncology, Georgetown Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China
| | - Ping Li
- Cancer Center, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China
| | - Qi Zhou
- Department of Oncology, Georgetown Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
- Cancer Center, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China
| | - Ruyuan He
- Department of Thoracic Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China
| | - Guannan Wang
- Department of Oncology, Georgetown Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Shiya Zhu
- Department of Oncology, Georgetown Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Amir Bagheri
- Department of Oncology, Georgetown Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Gary Kupfer
- Department of Oncology, Georgetown Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Huadong Pei
- Department of Oncology, Georgetown Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, USA
| | - Juanjuan Li
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China
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3
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Ye J, Wu J, Liu B. Therapeutic strategies of dual-target small molecules to overcome drug resistance in cancer therapy. Biochim Biophys Acta Rev Cancer 2023; 1878:188866. [PMID: 36842765 DOI: 10.1016/j.bbcan.2023.188866] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Revised: 01/12/2023] [Accepted: 01/31/2023] [Indexed: 02/28/2023]
Abstract
Despite some advances in targeted therapeutics of human cancers, curative cancer treatment still remains a tremendous challenge due to the occurrence of drug resistance. A variety of underlying resistance mechanisms to targeted cancer drugs have recently revealed that the dual-target therapeutic strategy would be an attractive avenue. Compared to drug combination strategies, one agent simultaneously modulating two druggable targets generally shows fewer adverse reactions and lower toxicity. As a consequence, the dual-target small molecule has been extensively explored to overcome drug resistance in cancer therapy. Thus, in this review, we focus on summarizing drug resistance mechanisms of cancer cells, such as enhanced drug efflux, deregulated cell death, DNA damage repair, and epigenetic alterations. Based upon the resistance mechanisms, we further discuss the current therapeutic strategies of dual-target small molecules to overcome drug resistance, which will shed new light on exploiting more intricate mechanisms and relevant dual-target drugs for future cancer therapeutics.
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Affiliation(s)
- Jing Ye
- State Key Laboratory of Biotherapy and Cancer Center and Department of Otolaryngology, Head and Neck Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Junhao Wu
- State Key Laboratory of Biotherapy and Cancer Center and Department of Otolaryngology, Head and Neck Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Bo Liu
- State Key Laboratory of Biotherapy and Cancer Center and Department of Otolaryngology, Head and Neck Surgery, West China Hospital, Sichuan University, Chengdu 610041, China.
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4
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Lee EK, Liu JF. Rational Combinations of PARP Inhibitors with HRD-Inducing Molecularly Targeted Agents. Cancer Treat Res 2023; 186:171-188. [PMID: 37978136 DOI: 10.1007/978-3-031-30065-3_10] [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] [Indexed: 11/19/2023]
Abstract
Cancers with wild-type BRCA, homologous recombination proficiency, or de novo or acquired resistance to PARP inhibition represent a growing population of patients who may benefit from combinatorial PARP inhibitor strategies. We review targeted inhibitors of angiogenesis, epigenetic regulators, and PI3K, MAPK, and other cellular signaling pathways as inducers of homologous recombination deficiency, providing support for the use of PARP inhibitors in contexts not previously considered susceptible to PARP inhibition.
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5
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Washington CR, Moore KN. Resistance to Poly (ADP-Ribose) Polymerase Inhibitors (PARPi): Mechanisms and Potential to Reverse. Curr Oncol Rep 2022; 24:1685-1693. [PMID: 36346509 DOI: 10.1007/s11912-022-01337-6] [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] [Accepted: 06/30/2022] [Indexed: 11/10/2022]
Abstract
PURPOSE OF REVIEW This review will focus on the most common mechanisms for poly (ADP-ribose) polymerase inhibitors' (PARPi) resistance and the main strategies for overcoming acquired or de novo PARPi resistance. RECENT FINDINGS Initial approvals for PARPi as part of treatment for advanced epithelial ovarian cancer (EOC) started in 2014 with patient with recurrent cancer characterized by BRCA mutations in the 3rd and 4th line and now have approvals for front-line maintenance in both the BRCA mutated and BRCAwt populations. As with all therapies, patients will eventually develop resistance to treatment. The most common mechanisms for PARPi resistance include reversion mutations, methylation events, and restoration of homologous recombination deficiency (HRD) through combinations and targeting replication stress. As more and more patients receive initial treatment (and potential retreatment with PARPi), we need to better understand the mechanisms in which tumors acquire PARPi resistance.
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Affiliation(s)
- Christina R Washington
- Stephenson Cancer Center, University of Oklahoma HSC, 800 NE 10th St, Suite 5050, Oklahoma City, OK, 73104, USA.
| | - Kathleen N Moore
- Stephenson Cancer Center, University of Oklahoma HSC, 800 NE 10th St, Suite 5050, Oklahoma City, OK, 73104, USA
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6
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Hu X, Bian C, Zhao X, Yi T. Efficacy evaluation of multi-immunotherapy in ovarian cancer: From bench to bed. Front Immunol 2022; 13:1034903. [PMID: 36275669 PMCID: PMC9582991 DOI: 10.3389/fimmu.2022.1034903] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 09/26/2022] [Indexed: 11/18/2022] Open
Abstract
Ovarian cancer, one of the most common gynecological malignancies, is characterized by high mortality and poor prognosis. Cytoreductive surgery and chemotherapy remain the mainstay of ovarian cancer treatment, and most women experience recurrence after standard care therapies. There is compelling evidence that ovarian cancer is an immunogenic tumor. For example, the accumulation of tumor-infiltrating lymphocytes is associated with increased survival, while increases in immunosuppressive regulatory T cells are correlated with poor clinical outcomes. Therefore, immunotherapies targeting components of the tumor microenvironment have been gradually integrated into the existing treatment options, including immune checkpoint blockade, adoptive cell therapy, and cancer vaccines. Immunotherapies have changed guidelines for maintenance treatment and established a new paradigm in ovarian cancer treatment. Despite single immunotherapies targeting DNA repair mechanisms, immune checkpoints, and angiogenesis bringing inspiring efficacy, only a subset of patients can benefit much from it. Thus, the multi-immunotherapy investigation remains an active area for ovarian cancer treatment. The current review provides an overview of various clinically oriented forms of multi-immunotherapy and explores potentially effective combinational therapies for ovarian cancer.
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7
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Wu Q, Wei M, Yao L, Cheng X, Lu W, Xie X, Li X. Hyperthermia synergistically enhances antitumor efficacy of PARP inhibitor through impacting homologous recombination repair and oxidative stress in vitro. Biochem Biophys Res Commun 2022; 619:49-55. [PMID: 35738064 DOI: 10.1016/j.bbrc.2022.06.049] [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: 05/17/2022] [Revised: 06/07/2022] [Accepted: 06/15/2022] [Indexed: 11/28/2022]
Abstract
Tumors with homologous recombination (HR) deficiency are particularly responsive to PARP inhibitors, however strategies to improve the sensitivity of epithelial ovarian carcinoma (EOC) with sufficient HR abilities still need to be deeply explored. In the present study, we firstly validated that hyperthermia (HT) changed diverse genes and signal pathways related to HR and oxidative stress in HR proficient EOC cells. HT impaired HR efficiency through inhibiting Olaparib (Olap) induced RAD51 foci formation in EOC cells, which was independent of the expression level of RAD51. Combination therapy of HT and Olap synergistically induced oxidative stress and oxidative DNA damage of EOC cells. Furthermore, we revealed that HT and Olap synergistically aggravated double-strand breaks of DNA in EOC cells. Conclusively, our findings confirmed that HT could synergistically enhance HR proficient EOC cells' sensitivity to PARP inhibitor through impairing HR efficiency and increasing oxidative stress.
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Affiliation(s)
- Qianqian Wu
- Department of Gynecologic Oncology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310006, China; Zhejiang Provincial Key Laboratory of Precision Diagnosis and Therapy for Major Gynecological Diseases, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310006, China
| | - Mingjing Wei
- Department of Gynecologic Oncology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310006, China; Zhejiang Provincial Key Laboratory of Precision Diagnosis and Therapy for Major Gynecological Diseases, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310006, China
| | - Lifang Yao
- Department of Gynecologic Oncology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310006, China; Zhejiang Provincial Key Laboratory of Precision Diagnosis and Therapy for Major Gynecological Diseases, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310006, China; Department of Obstetrics and Gynecology, Shaoxing Maternal and Child Health Hospital, Shaoxing, Zhejiang, 312000, China
| | - Xiaodong Cheng
- Department of Gynecologic Oncology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310006, China; Zhejiang Provincial Key Laboratory of Precision Diagnosis and Therapy for Major Gynecological Diseases, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310006, China; Cancer Center, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Weiguo Lu
- Department of Gynecologic Oncology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310006, China; Zhejiang Provincial Key Laboratory of Precision Diagnosis and Therapy for Major Gynecological Diseases, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310006, China; Cancer Center, Zhejiang University, Hangzhou, Zhejiang, 310058, China; Center for Uterine Cancer Diagnosis & Therapy Research of Zhejiang Province, Hangzhou, 310006, China
| | - Xing Xie
- Department of Gynecologic Oncology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310006, China; Zhejiang Provincial Key Laboratory of Precision Diagnosis and Therapy for Major Gynecological Diseases, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310006, China; Cancer Center, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Xiao Li
- Department of Gynecologic Oncology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310006, China; Zhejiang Provincial Key Laboratory of Precision Diagnosis and Therapy for Major Gynecological Diseases, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310006, China; Cancer Center, Zhejiang University, Hangzhou, Zhejiang, 310058, China.
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8
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Koole SN, Schouten PC, Hauke J, Kluin RJC, Nederlof P, Richters LK, Krebsbach G, Sikorska K, Alkemade M, Opdam M, Schagen van Leeuwen JH, Schreuder HWR, Hermans RHM, de Hingh IHJT, Mom CH, Arts HJG, van Ham M, van Dam P, Vuylsteke P, Sanders J, Horlings HM, van de Vijver KK, Hahnen E, van Driel WJ, Schmutzler R, Sonke GS, Linn SC. Effect of HIPEC according to HRD/BRCAwt genomic profile in stage III ovarian cancer - results from the phase III OVHIPEC trial. Int J Cancer 2022; 151:1394-1404. [PMID: 35583992 DOI: 10.1002/ijc.34124] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 04/09/2022] [Accepted: 04/21/2022] [Indexed: 11/07/2022]
Abstract
The addition of hyperthermic intraperitoneal chemotherapy (HIPEC) with cisplatin to interval cytoreductive surgery improves recurrence-free (RFS) and overall survival (OS) in patients with stage III ovarian cancer. Homologous recombination deficient (HRD) ovarian tumors are usually more platinum sensitive. Since hyperthermia impairs BRCA1/2 protein function, we hypothesized that HRD tumors respond best to treatment with HIPEC. We analyzed the effect of HIPEC in patients in the OVHIPEC trial, stratified by HRD status and BRCAm status. Clinical data and tissue samples were collected from patients included in the randomized, phase III OVHIPEC-1 trial. DNA copy number variation (CNV) profiles, HRD-related pathogenic mutations, and BRCA1 promotor hypermethylation were determined. CNV-profiles were categorized as HRD or non-HRD, based on a previously validated algorithm-based BRCA1-like classifier. Hazard ratios (HR) and corresponding 99% confidence intervals (CI) for the effect of RFS and OS of HIPEC in the BRCAm, the HRD/BRCAwt and the non-HRD group were estimated using Cox proportional hazard models. DNA was available from 200/245 (82%) patients. Seventeen (9%) tumors carried a pathogenic mutation in BRCA1 and 14 (7%) in BRCA2. Ninety-one (46%) tumors classified as BRCA1-like. The effect of HIPEC on RFS and OS was absent in BRCAm tumors (HR 1.25; 99%CI 0.48-3.29), and most present in HRD/BRCAwt (HR 0.44; 99%CI 0.21-0.91), and non-HRD/BRCAwt tumors (HR 0.82; 99%CI 0.48-1.42), interaction p-value: 0.024. Patients with HRD tumors without pathogenic BRCA1/2 mutation appear to benefit most from treatment with HIPEC, while benefit in patients with BRCA1/2 pathogenic mutations and patients without HRD seems less evident.
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Affiliation(s)
- Simone N Koole
- Department of Gynecology, The Netherlands Cancer Institute, Center of Gynecologic Oncology Amsterdam, Amsterdam, The Netherlands
- Department of Medical Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Philip C Schouten
- Department of Molecular Pathology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Jan Hauke
- Faculty of Medicine and Center for Familial Breast and Ovarian Cancer and Center for Integrated Oncology (CIO), Cologne, University Hospital Cologne, Cologne, Germany
| | - Roel J C Kluin
- Genomics Core Facility, Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Petra Nederlof
- Department of Pathology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Lisa K Richters
- Faculty of Medicine and Center for Familial Breast and Ovarian Cancer and Center for Integrated Oncology (CIO), Cologne, University Hospital Cologne, Cologne, Germany
| | - Gabriele Krebsbach
- Faculty of Medicine and Center for Familial Breast and Ovarian Cancer and Center for Integrated Oncology (CIO), Cologne, University Hospital Cologne, Cologne, Germany
| | - Karolina Sikorska
- Department of Biometrics, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Maartje Alkemade
- Core Facility of Molecular Pathology and Biobanking, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Mark Opdam
- Core Facility of Molecular Pathology and Biobanking, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | | | - Henk W R Schreuder
- Department of Gynecological Oncology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Ralph H M Hermans
- Department of Gynecology and Obstetrics, Catharina Hospital, Eindhoven, The Netherlands
| | | | - Constantijne H Mom
- Department of Obstetrics and Gynecology, Amsterdam University Medical Center, Center of Gynecologic Oncology Amsterdam, Amsterdam, The Netherlands
| | - Henriette J G Arts
- Department of Gynecological Oncology, University Medical Center Groningen, Groningen, The Netherlands
| | - Maaike van Ham
- Department of Gynecological Oncology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Peter van Dam
- Department of Gynecologic Oncology, University Hospital Antwerp, Antwerp, Belgium
| | - Peter Vuylsteke
- Department of Medical Oncology, UCL Louvain, CHU Namur Sainte-Elisabeth, Namur, Belgium
- University of Botswana, Gaborone, Botswana
| | - Joyce Sanders
- Department of Pathology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Hugo M Horlings
- Department of Pathology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | | | - Eric Hahnen
- Faculty of Medicine and Center for Familial Breast and Ovarian Cancer and Center for Integrated Oncology (CIO), Cologne, University Hospital Cologne, Cologne, Germany
| | - Willemien J van Driel
- Department of Gynecology, The Netherlands Cancer Institute, Center of Gynecologic Oncology Amsterdam, Amsterdam, The Netherlands
| | - Rita Schmutzler
- Faculty of Medicine and Center for Familial Breast and Ovarian Cancer and Center for Integrated Oncology (CIO), Cologne, University Hospital Cologne, Cologne, Germany
| | - Gabe S Sonke
- Department of Medical Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Sabine C Linn
- Department of Medical Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
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9
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Dual-target inhibitors based on PARP1: new trend in the development of anticancer research. Future Med Chem 2022; 14:511-525. [PMID: 35257598 DOI: 10.4155/fmc-2021-0292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
PARP1 is a hot target, and its inhibitors have been approved for cancer therapy. However, some undesirable properties restrict the application of PARP1 inhibitors, including drug resistance, side effects and low efficiency. For multifactorial diseases, dual-target drugs have exhibited excellent synergistic effects, such as reduced drug resistance, low side effects and high therapeutic efficacy, by simultaneously regulating the main pathogenic and compensatory signal pathways of diseases. In recent years, several dual-target inhibitors based on PARP1 have been reported and have demonstrated unique advantages. In this review we summarize the research progress in dual-target inhibitors based on PARP1 and discuss the related drug design strategies and structure-activity relationships. This work is expected to provide references for the development of PARP1 inhibitors.
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10
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Ho KT, Chen PF, Chuang JY, Gean PW, Hsueh YS. A heat shock protein 90 inhibitor reduces oncoprotein expression and induces cell death in heterogeneous glioblastoma cells with EGFR, PDGFRA, CDK4, and NF1 aberrations. Life Sci 2022; 288:120176. [PMID: 34848192 DOI: 10.1016/j.lfs.2021.120176] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 11/18/2021] [Accepted: 11/19/2021] [Indexed: 01/09/2023]
Abstract
AIMS Glioblastoma (GBM) is a highly malignant brain tumor. After treatment with the first-line drug temozolomide, only 50% of patients are responsive. Recent literature shows that the difficulty in treating GBM is mainly due to the heterogeneity of its four major cellular states, which are characterized by differences in EGFR, PDGFRA, CDK4, and NF1. Therefore, development of a multitarget drug is a potential strategy for treating heterogeneous GBM. MAIN METHODS In this study, the antitumor ability of a potent heat shock protein 90 inhibitor, NVP-AUY922 (AUY922), was evaluated in GBM cell lines (U-87 MG and T98G cells) and patient-derived GBM cell lines [P#5 and P#5 temozolomide-resistant (TMZ-R) cells]. KEY FINDINGS We found that AUY922 significantly reduced cell viability and colony formation in four GBM cell lines. AUY922 also significantly induced apoptosis by increasing PARP1 cleavage and the number of annexin V-positive cells. The autophagy indicators as MAP1LC3B cleavage and MAP1LC3B puncta were increased after AUY922 treatment. AUY922-induced cell death could be partially reversed by pharmacological inhibition of either apoptotic inhibitor or autophagy inhibitor. Moreover, AUY922 reduced the mRNA and protein expressions of EGFR, PDGFRA, CDK4, and NF1, which contribute to the four cellular state subtypes in GBM cells. In addition, the downstream signaling proteins of these four proteins, AKT/p-AKT, MAPK/p-MAPK, and BRAF, were downregulated after AUY922 treatment. SIGNIFICANCE Taken together, AUY922 led to GBM cell death via apoptosis and autophagy, and reduced the mRNA and protein expression of EGFR, PDGFRA, CDK4, and NF1in heterogeneous GBM cells.
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Affiliation(s)
- Kuan-Ta Ho
- Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Pei-Fan Chen
- Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Jian-Ying Chuang
- Graduate Institute of Neural Regenerative Medicine, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan
| | - Po-Wu Gean
- Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Department of Biotechnology and Bioindustry Sciences, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, Taiwan.
| | - Yuan-Shuo Hsueh
- Department of Biotechnology and Bioindustry Sciences, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, Taiwan; Department of Medical Science Industries, College of Health Sciences, Chang Jung Christian University, Tainan, Taiwan.
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11
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Kurop MK, Huyen CM, Kelly JH, Blagg BSJ. The heat shock response and small molecule regulators. Eur J Med Chem 2021; 226:113846. [PMID: 34563965 PMCID: PMC8608735 DOI: 10.1016/j.ejmech.2021.113846] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 09/07/2021] [Accepted: 09/07/2021] [Indexed: 01/09/2023]
Abstract
The heat shock response (HSR) is a highly conserved cellular pathway that is responsible for stress relief and the refolding of denatured proteins [1]. When a host cell is exposed to conditions such as heat shock, ischemia, or toxic substances, heat shock factor-1 (HSF-1), a transcription factor, activates the genes that encode for the heat shock proteins (Hsps), which are a family of proteins that work alongside other chaperones to relieve stress and refold proteins that have been denatured (Burdon, 1986) [2]. Along with the refolding of denatured proteins, Hsps facilitate the removal of misfolded proteins by escorting them to degradation pathways, thereby preventing the accumulation of misfolded proteins [3]. Research has indicated that many pathological conditions, such as diabetes, cancer, neuropathy, cardiovascular disease, and aging have a negative impact on HSR function and are commonly associated with misfolded protein aggregation [4,5]. Studies indicate an interplay between mitochondrial homeostasis and HSF-1 levels can impact stress resistance, proteostasis, and malignant cell growth, which further support the role of Hsps in pathological and metabolic functions [6]. On the other hand, Hsp activation by specific small molecules can induce the heat shock response, which can afford neuroprotection and other benefits [7]. This review will focus on the modulation of Hsps and the HSR as therapeutic options to treat these conditions.
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Affiliation(s)
- Margaret K Kurop
- Warren Center for Drug Discovery, Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Cormac M Huyen
- Warren Center for Drug Discovery, Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - John H Kelly
- Warren Center for Drug Discovery, Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Brian S J Blagg
- Warren Center for Drug Discovery, Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, 46556, USA.
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12
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Biegała Ł, Gajek A, Marczak A, Rogalska A. PARP inhibitor resistance in ovarian cancer: Underlying mechanisms and therapeutic approaches targeting the ATR/CHK1 pathway. Biochim Biophys Acta Rev Cancer 2021; 1876:188633. [PMID: 34619333 DOI: 10.1016/j.bbcan.2021.188633] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 09/14/2021] [Accepted: 10/01/2021] [Indexed: 01/01/2023]
Abstract
Ovarian cancer (OC) constitutes the most common cause of gynecologic cancer-related death in women worldwide. Despite consistent developments in treatment strategies for OC, the management of advanced-stage disease remains a significant challenge. Recent improvements in targeted treatments based on poly(ADP-ribose) polymerase (PARP) inhibitors (PARPi) have provided invaluable benefits to patients with OC. Unfortunately, numerous patients do not respond to PARPi due to intrinsic resistance or acquisition of resistance. Here, we discuss mechanisms of resistance to PARPi that have specifically emerged in OC including increased drug efflux, restoration of HR repair, re-establishment of replication fork stability, reduced PARP1 trapping, abnormalities in PARP signaling, and less common pathways associated with alternative DNA sensing and repair pathways. Elucidation of the precise mechanisms is essential for the development of novel strategies to re-sensitize OC cells to PARPi agents. Additionally, novel potential concepts for preventing and combating resistance to PARPi under development and relevant clinical reports on treatment strategies have been reviewed, with emphasis on the exploitation of the ATR/CHK1 kinase pathway in sensitization to PARPi to overcome resistance-induced vulnerability in ovarian cancer.
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Affiliation(s)
- Łukasz Biegała
- Department of Medical Biophysics, Institute of Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland.
| | - Arkadiusz Gajek
- Department of Medical Biophysics, Institute of Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland.
| | - Agnieszka Marczak
- Department of Medical Biophysics, Institute of Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland.
| | - Aneta Rogalska
- Department of Medical Biophysics, Institute of Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland.
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13
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Wattenberg MM, Reiss KA. Determinants of Homologous Recombination Deficiency in Pancreatic Cancer. Cancers (Basel) 2021; 13:4716. [PMID: 34572943 PMCID: PMC8466888 DOI: 10.3390/cancers13184716] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 09/10/2021] [Accepted: 09/16/2021] [Indexed: 12/23/2022] Open
Abstract
Pancreatic cancer is a treatment-resistant malignancy associated with high mortality. However, defective homologous recombination (HR), a DNA repair mechanism required for high-fidelity repair of double-strand DNA breaks, is a therapeutic vulnerability. Consistent with this, a subset of patients with pancreatic cancer show unique tumor responsiveness to HR-dependent DNA damage triggered by certain treatments (platinum chemotherapy and PARP inhibitors). While pathogenic mutations in HR genes are a major driver of this sensitivity, another layer of diverse tumor intrinsic and extrinsic factors regulate the HR deficiency (HRD) phenotype. Defining the mechanisms that drive HRD may guide the development of novel strategies and therapeutics to induce treatment sensitivity in non-HRD tumors. Here, we discuss the complexity underlying HRD in pancreatic cancer and highlight implications for identifying and treating this distinct subset of patients.
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Affiliation(s)
- Max M. Wattenberg
- Division of Hematology-Oncology, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA;
- Abramson Cancer Center, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Kim A. Reiss
- Division of Hematology-Oncology, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA;
- Abramson Cancer Center, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
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14
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Wang Y, Chen Q, Wu D, Chen Q, Gong G, He L, Wu X. Lamin-A interacting protein Hsp90 is required for DNA damage repair and chemoresistance of ovarian cancer cells. Cell Death Dis 2021; 12:786. [PMID: 34381017 PMCID: PMC8358027 DOI: 10.1038/s41419-021-04074-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2021] [Revised: 07/27/2021] [Accepted: 07/29/2021] [Indexed: 12/20/2022]
Abstract
Ovarian cancer is the most malignant gynecologic cancer. Previous studies found that lamin-A was associated with DNA damage repair proteins but the underlying mechanism remains unclear. We speculate that this may be related to its interacting proteins, such as Hsp90. The aim of this study is to investigate the effects of Hsp90 on DNA damage repair and chemoresistance of ovarian cancer cells. In our research, co-immunoprecipitation (co-IP) and mass spectrometry (MS) were used to identify proteins interacting with lamin-A and the interaction domain. Next, the relationship between lamin-A and Hsp90 was explored by Western blotting (WB) and immunofluorescence staining. Then, effect of Hsp90 inhibition on DNA damage repair was assessed through detecting Rad50 and Ku80 by WB. Furthermore, to test the roles of 17-AAG on cell chemosensitivity, CCK-8 and colony formation assay were carried out. Meanwhile, IC50 of cells were calculated, followed by immunofluorescence to detect DNA damage. At last, the mouse xenograft model was used in determining the capacity of 17-AAG and DDP to suppress tumor growth and metastatic potential. The results showed that lamin-A could interact with Hsp90 via the domain of lamin-A1-430. Besides, the distribution of Hsp90 could be affected by lamin-A. After lamin-A knockdown, Hsp90 decreased in the cytoplasm and increased in the nucleus, suggesting that the interaction between lamin-A and Hsp90 may be related to the nucleocytoplasmic transport of Hsp90. Moreover, inhibition of Hsp90 led to an obvious decrease in the expression of DSBs (DNA double-strand break) repair proteins, as well as cell proliferation ability upon DDP treatment and IC50 of DDP, causing more serious DNA damage. In addition, the combination of 17-AAG and DDP restrained the growth of ovarian cancer efficiently in vivo and prolonged the survival time of tumor-bearing mice.
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Affiliation(s)
- Yixuan Wang
- Department of Pathology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan Province, P. R. China
- Department of Pathology, School of Basic Medical Science, Central South University, Changsha, 410008, Hunan Province, P. R. China
| | - Quan Chen
- Department of Pathology, School of Basic Medical Science, Central South University, Changsha, 410008, Hunan Province, P. R. China
| | - Di Wu
- Department of Pathology, School of Basic Medical Science, Central South University, Changsha, 410008, Hunan Province, P. R. China
| | - Qifeng Chen
- Department of Pathology, School of Basic Medical Science, Central South University, Changsha, 410008, Hunan Province, P. R. China
| | - Guanghui Gong
- Department of Pathology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan Province, P. R. China
- Department of Pathology, School of Basic Medical Science, Central South University, Changsha, 410008, Hunan Province, P. R. China
| | - Liuqing He
- Department of Pathology, School of Basic Medical Science, Central South University, Changsha, 410008, Hunan Province, P. R. China
| | - Xiaoying Wu
- Department of Pathology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan Province, P. R. China.
- Department of Pathology, School of Basic Medical Science, Central South University, Changsha, 410008, Hunan Province, P. R. China.
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15
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Liu H, Lu Z, Shi X, Liu L, Zhang P, Golemis EA, Tu Z. HSP90 inhibition downregulates DNA replication and repair genes via E2F1 repression. J Biol Chem 2021; 297:100996. [PMID: 34302809 PMCID: PMC8363837 DOI: 10.1016/j.jbc.2021.100996] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Revised: 07/09/2021] [Accepted: 07/19/2021] [Indexed: 12/15/2022] Open
Abstract
Mantle cell lymphoma (MCL) is an especially aggressive and highly heterogeneous mature B-cell lymphoma. Heat shock protein 90 (HSP90) is considered an attractive therapeutic target in a variety of cancers, including MCL, but no HSP90 inhibitors have succeeded in the clinical trials to date. Exploring fine mechanisms of HSP90 inhibition in cancer cells may shed light on novel therapeutic strategies. Here, we found that HSP90 knockdown and continuous inhibition with ganetespib inhibited growth of MCL cells in vitro and in vivo. To our surprise, transient exposure over 12 h was almost as efficient as continuous exposure, and treatment with ganetespib for 12 h efficiently inhibited growth and induced G1 cell cycle arrest and apoptosis of MCL cells. Transcriptome analysis complemented by functional studies was performed to define critical MCL signaling pathways that are exceptionally sensitive to HSP90 inhibition and vital to cell fate. Six genes (cell division cycle 6, cell division cycle 45, minichromosome maintenance 4, minichromosome maintenance 7, RecQ-mediated genome instability 2, and DNA primase polypeptide 1) involved in DNA replication and repair were identified as consistently downregulated in three MCL cell lines after transient ganetespib treatment. E2F1, an important transcription factor essential for cell cycle progression, was identified as a ganetespib target mediating transcriptional downregulation of these six genes, and its stability was also demonstrated to be maintained by HSP90. This study identifies E2F1 as a novel client protein of HSP90 that is very sensitive and worthy of targeting and also finds that HSP90 inhibitors may be useful in combination therapies for MCL.
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Affiliation(s)
- Hanqing Liu
- School of Pharmacy, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Ziwen Lu
- School of Pharmacy, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Xiaofeng Shi
- Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu, China
| | - Lanlan Liu
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Peishan Zhang
- School of Pharmacy, Jiangsu University, Zhenjiang, Jiangsu, China; Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania, USA
| | - Erica A Golemis
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania, USA.
| | - Zhigang Tu
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu, China.
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16
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Hinchcliff E, Chelariu-Raicu A, Westin SN. Current and future landscape of poly (ADP-ribose) polymerase inhibition resistance. Curr Opin Obstet Gynecol 2021; 33:19-25. [PMID: 33315700 PMCID: PMC7958870 DOI: 10.1097/gco.0000000000000678] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW To highlight relevant strategies to overcome poly(ADP-ribose) polymerase (PARP) inhibitor resistance and present key clinical trials. RECENT FINDINGS The use of PARP inhibition (PARPi) for frontline maintenance offers substantial clinical benefit in patients with homologous recombination-deficient tumors. However, expanding PARPi from recurrent therapy to frontline maintenance may potentially result in more PARPi resistant tumors earlier in the treatment continuum and data for the use of PARPi after PARPi remain limited. Clinical evidence demonstrates tumors may develop resistance to PARPi through demethylation of the BRCA promoter or BRCA reversion mutations. Multiple clinical trials investigating therapeutic strategies to overcome resistance, such as combinations of PARPi with antiangiogenic drugs, PI3K/AKT/mTOR, or MEK inhibitors have already been reported and more are ongoing. Furthermore, increasing the amount of DNA damage in the tumor using chemotherapy or cell cycle inhibitors such as ATM, ATR/CHK1/WEE1 is also under exploration. SUMMARY There is increasing clinical interest to identify options to enhance PARPi efficacy and overcome adaptive resistance. PARPi represent a class of drugs that have significantly impacted the treatment and maintenance of ovarian cancer; as the use of PARPi increases, better understanding of resistance mechanisms is essential.
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Affiliation(s)
- Emily Hinchcliff
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Anca Chelariu-Raicu
- Department of Obstetrics and Gynecology, University Hospital, LMU Munich, Germany
| | - Shannon N. Westin
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
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17
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Lee EK, Matulonis UA. PARP Inhibitor Resistance Mechanisms and Implications for Post-Progression Combination Therapies. Cancers (Basel) 2020; 12:E2054. [PMID: 32722408 PMCID: PMC7465003 DOI: 10.3390/cancers12082054] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 07/21/2020] [Accepted: 07/22/2020] [Indexed: 12/12/2022] Open
Abstract
The use of PARP inhibitors (PARPi) is growing widely as FDA approvals have shifted its use from the recurrence setting to the frontline setting. In parallel, the population developing PARPi resistance is increasing. Here we review the role of PARP, DNA damage repair, and synthetic lethality. We discuss mechanisms of resistance to PARP inhibition and how this informs on novel combinations to re-sensitize cancer cells to PARPi.
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Affiliation(s)
- Elizabeth K. Lee
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215-5450, USA;
| | - Ursula A. Matulonis
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215-5450, USA;
- Division of Gynecologic Oncology, Dana-Farber Cancer Institute, Boston, MA 02215-5450, USA
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18
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Clinical Implications of DNA Repair Defects in High-Grade Serous Ovarian Carcinomas. Cancers (Basel) 2020; 12:cancers12051315. [PMID: 32455819 PMCID: PMC7281678 DOI: 10.3390/cancers12051315] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 05/15/2020] [Accepted: 05/19/2020] [Indexed: 12/21/2022] Open
Abstract
Despite significant improvements in surgical and medical management, high grade serous ovarian cancer (HGSOC) still represents the deadliest gynecologic malignancy and the fifth most frequent cause of cancer-related mortality in women in the USA. Since DNA repair alterations are regarded as the “the Achille’s heel” of HGSOC, both DNA homologous recombination and DNA mismatch repair deficiencies have been explored and targeted in epithelial ovarian cancers in the latest years. In this review, we aim at focusing on the therapeutic issues deriving from a faulty DNA repair machinery in epithelial ovarian cancers, starting from existing and well-established treatments and investigating new therapeutic approaches which could possibly improve ovarian cancer patients’ survival outcomes in the near future. In particular, we concentrate on the role of both Poly (ADP-ribose) Polymerase (PARP) inhibitors (PARPis) and immune checkpoint inhibitors in HGSOC, highlighting their activity in relation to BRCA1/2 mutational status and homologous recombination deficiency (HRD). We investigate the biological rationale supporting their use in the clinical setting, pointing at tracking their route from the laboratory bench to the patient’s bedside. Finally, we deal with the onset of mechanisms of primary and acquired resistance to PARPis, reporting the pioneering strategies aimed at converting homologous-recombination (HR) proficient tumors into homologous recombination (HR)-deficient HGSOC.
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19
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Guan L, Zou Q, Liu Q, Lin Y, Chen S. HSP90 Inhibitor Ganetespib (STA-9090) Inhibits Tumor Growth in c-Myc-Dependent Esophageal Squamous Cell Carcinoma. Onco Targets Ther 2020; 13:2997-3011. [PMID: 32308431 PMCID: PMC7156265 DOI: 10.2147/ott.s245813] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 03/18/2020] [Indexed: 12/18/2022] Open
Abstract
PURPOSE Currently, the paucity of classical effective pharmacological drugs to treat esophageal squamous cell carcinoma (ESCC) is a major problem. The c-Myc (MYC) protein is a promising target as it is overexpressed in ESCC. MYC is a sensitive client protein of the heat shock protein 90 (HSP90) and, therefore, targeting the HSP90-MYC axis by inhibition of HSP90 is a potential therapeutic strategy for ESCC. Here, we evaluated the clinical application value of the HSP90 inhibitor (Ganetespib, STA-9090) as an anti-cancer agent for MYC-positive ESCC. MATERIALS AND METHODS We first analyzed ESCC tissue microarrays and clinical tissue samples to determine MYC expression. The relationship between MYC and HSP90 was analyzed by co-immunoprecipitation assays and immunofluorescence. In in vitro cell models, cell growth was analyzed using the CCK-8 kit, and MYC protein expression was analyzed by Western blot. The in vivo antitumor activity of STA-9090 was assessed in two xenograft animal models. RESULTS We demonstrated that MYC-overexpressing ESCC cells were highly sensitive to STA-9090 treatment through suppressing ESCC cell proliferation, cell cycle progression and survival. Moreover, STA-9090 treatment decreased MYC expression, reducing the half-life of the MYC protein. We further established two xenograft mouse models using ESCC cells and clinical ESCC samples to validate the effectiveness of STA-9090 in vivo. In both xenograft models, STA-9090 substantially inhibited the growth of MYC-positive ESCC tumors in vivo. In contrast, STA-9090 treatment demonstrated no beneficial effects in mice with low-MYC expressing ESCC tumors. CONCLUSION In conclusion, our data support that the HSP90 inhibitor, STA-9090, suppresses the expression of the MYC protein and interferes with HSP90-MYC protein-protein interaction. This, in turn, leads to inhibition of ESCC cell proliferation and promotion of apoptosis in ESCC cells in vitro and reduction of ESCC tumors in vivo. We propose, based on our findings, that STA-9090 is a potential novel therapeutic target for MYC-positive ESCC.
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Affiliation(s)
- Liuliu Guan
- Department of Oncology, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
- Guangdong Provincial Engineering Research Center for Esophageal Cancer Precise Therapy, Guangzhou, The First Affiliated Hospital of Guangdong Pharmaceutical University, People’s Republic of China
| | - Qingqing Zou
- Department of Oncology, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
- Guangdong Provincial Engineering Research Center for Esophageal Cancer Precise Therapy, Guangzhou, The First Affiliated Hospital of Guangdong Pharmaceutical University, People’s Republic of China
| | - Qian Liu
- Guangdong Provincial Engineering Research Center for Esophageal Cancer Precise Therapy, Guangzhou, The First Affiliated Hospital of Guangdong Pharmaceutical University, People’s Republic of China
- Central Laboratory, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
| | - Yiguang Lin
- Central Laboratory, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
- School of Life Sciences, University of Technology Sydney, Sydney, NSW, Australia
- Correspondence: Yiguang Lin School of Life Sciences, University of Technology Sydney, PO Box 123, Broadway, NSW2007, AustraliaTel +61 2 95142223Fax +61 2 95148206 Email
| | - Size Chen
- Department of Oncology, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
- Guangdong Provincial Engineering Research Center for Esophageal Cancer Precise Therapy, Guangzhou, The First Affiliated Hospital of Guangdong Pharmaceutical University, People’s Republic of China
- Central Laboratory, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
- Size Chen Department of Oncology, The First Affiliated Hospital of Guangdong Pharmaceutical University, 19 NonglinXia Road, Guangzhou510080, People’s Republic of ChinaTel +86 20 61325337 Email
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