1
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Marcyk PT, LeBlanc EV, Kuntz DA, Xue A, Ortiz F, Trilles R, Bengtson S, Kenney TM, Huang DS, Robbins N, Williams NS, Krysan DJ, Privé GG, Whitesell L, Cowen LE, Brown LE. Fungal-Selective Resorcylate Aminopyrazole Hsp90 Inhibitors: Optimization of Whole-Cell Anticryptococcal Activity and Insights into the Structural Origins of Cryptococcal Selectivity. J Med Chem 2021; 64:1139-1169. [PMID: 33444025 PMCID: PMC8493596 DOI: 10.1021/acs.jmedchem.0c01777] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The essential eukaryotic chaperone Hsp90 regulates the form and function of diverse client proteins, many of which govern thermotolerance, virulence, and drug resistance in fungal species. However, use of Hsp90 inhibitors as antifungal therapeutics has been precluded by human host toxicities and suppression of immune responses. We recently described resorcylate aminopyrazoles (RAPs) as the first class of Hsp90 inhibitors capable of discriminating between fungal (Cryptococcus neoformans, Candida albicans) and human isoforms of Hsp90 in biochemical assays. Here, we report an iterative structure-property optimization toward RAPs capable of inhibiting C. neoformans growth in culture. In addition, we report the first X-ray crystal structures of C. neoformans Hsp90 nucleotide binding domain (NBD), as the apoprotein and in complexes with the non-species-selective Hsp90 inhibitor NVP-AUY922 and three RAPs revealing unique ligand-induced conformational rearrangements, which reaffirm the hypothesis that intrinsic differences in protein flexibility can confer selective inhibition of fungal versus human Hsp90 isoforms.
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Affiliation(s)
- Paul T. Marcyk
- Department of Chemistry and Center for Molecular Discovery (BU-CMD), Boston University, Boston, Massachusetts 02215, United States
| | - Emmanuelle V. LeBlanc
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, M5G 1M1, Canada
| | - Douglas A. Kuntz
- Princess Margaret Cancer Centre, Toronto, Ontario, M5G 1L7, Canada
| | - Alice Xue
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, M5G 1M1, Canada
| | - Francisco Ortiz
- Department of Biochemistry, UT Southwestern Medical Center, Dallas, Texas 75390-9038, United States
| | - Richard Trilles
- Department of Chemistry and Center for Molecular Discovery (BU-CMD), Boston University, Boston, Massachusetts 02215, United States
| | - Stephen Bengtson
- Department of Chemistry and Center for Molecular Discovery (BU-CMD), Boston University, Boston, Massachusetts 02215, United States
| | - Tristan M.G. Kenney
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, M5G 1L7, Canada
| | - David S. Huang
- Department of Chemistry and Center for Molecular Discovery (BU-CMD), Boston University, Boston, Massachusetts 02215, United States
| | - Nicole Robbins
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, M5G 1M1, Canada
| | - Noelle S. Williams
- Department of Biochemistry, UT Southwestern Medical Center, Dallas, Texas 75390-9038, United States
| | - Damian J. Krysan
- Departments of Pediatrics and Microbiology/Immunology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, 52242, United States
| | - Gilbert G. Privé
- Princess Margaret Cancer Centre, Toronto, Ontario, M5G 1L7, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, M5G 1L7, Canada
- Department of Biochemistry, University of Toronto, Toronto, Ontario, M5S 1A8, Canada
| | - Luke Whitesell
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, M5G 1M1, Canada
| | - Leah E. Cowen
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, M5G 1M1, Canada
| | - Lauren E. Brown
- Department of Chemistry and Center for Molecular Discovery (BU-CMD), Boston University, Boston, Massachusetts 02215, United States
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2
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Singh S, Abu-Zaid A, Lin W, Low J, Abdolvahabi A, Jin H, Wu Q, Cooke B, Fang J, Bowling J, Vaithiyalingam S, Currier D, Yun MK, Fernando DM, Maier J, Tillman H, Bulsara P, Lu Z, Das S, Shelat A, Li Z, Young B, Lee R, Rankovic Z, Murphy AJ, White SW, Davidoff AM, Chen T, Yang J. 17-DMAG dually inhibits Hsp90 and histone lysine demethylases in alveolar rhabdomyosarcoma. iScience 2020; 24:101996. [PMID: 33490904 PMCID: PMC7811140 DOI: 10.1016/j.isci.2020.101996] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 06/09/2020] [Accepted: 12/23/2020] [Indexed: 12/15/2022] Open
Abstract
Histone lysine demethylases (KDMs) play critical roles in oncogenesis and therefore may be effective targets for anticancer therapy. Using a time-resolved fluorescence resonance energy transfer demethylation screen assay, in combination with multiple orthogonal validation approaches, we identified geldanamycin and its analog 17-DMAG as KDM inhibitors. In addition, we found that these Hsp90 inhibitors increase degradation of the alveolar rhabdomyosarcoma (aRMS) driver oncoprotein PAX3-FOXO1 and induce the repressive epigenetic mark H3K9me3 and H3K36me3 at genomic loci of PAX3-FOXO1 targets. We found that as monotherapy 17-DMAG significantly inhibits expression of PAX3-FOXO1 target genes and multiple oncogenic pathways, induces a muscle differentiation signature, delays tumor growth and extends survival in aRMS xenograft mouse models. The combination of 17-DMAG with conventional chemotherapy significantly enhances therapeutic efficacy, indicating that targeting KDM in combination with chemotherapy may serve as a therapeutic approach to PAX3-FOXO1-positive aRMS. Identification of geldanamycin/17-DMAG as histone lysine demethylase inhibitors Geldanamycin/17-DMAG causes degradation of PAX3-FOXO1, an Hsp90 client Geldanamycin/17-DMAG induces epigenetic changes and targets PAX3-FOXO1 pathway 17-DMAG alone or combined with chemotherapy show potency to PAX3-FOXO1 xenografts
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Affiliation(s)
- Shivendra Singh
- Department of Surgery, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis TN 38105, USA
| | - Ahmed Abu-Zaid
- Department of Surgery, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis TN 38105, USA
| | - Wenwei Lin
- Department of Chemical Biology and Therapeutics, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Jonathan Low
- Department of Chemical Biology and Therapeutics, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Alireza Abdolvahabi
- Department of Chemical Biology and Therapeutics, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Hongjian Jin
- Center for Applied Bioinformatics, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Qiong Wu
- Department of Surgery, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis TN 38105, USA
| | - Bailey Cooke
- Department of Surgery, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis TN 38105, USA
| | - Jie Fang
- Department of Surgery, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis TN 38105, USA
| | - John Bowling
- Department of Chemical Biology and Therapeutics, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Sivaraja Vaithiyalingam
- Protein Technologies Center, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA.,Department of Structural Biology, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Duane Currier
- Department of Chemical Biology and Therapeutics, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Mi-Kyung Yun
- Department of Structural Biology, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Dinesh M Fernando
- Department of Chemical Biology and Therapeutics, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Julie Maier
- Department of Chemical Biology and Therapeutics, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Heather Tillman
- Department of Pathology, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Purva Bulsara
- Department of Biostatistics, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Zhaohua Lu
- Department of Biostatistics, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Sourav Das
- Department of Chemical Biology and Therapeutics, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Anang Shelat
- Department of Chemical Biology and Therapeutics, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Zhenmei Li
- Department of Structural Biology, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Brandon Young
- Department of Chemical Biology and Therapeutics, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Richard Lee
- Department of Chemical Biology and Therapeutics, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Zoran Rankovic
- Department of Chemical Biology and Therapeutics, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Andrew J Murphy
- Department of Surgery, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis TN 38105, USA
| | - Stephen W White
- Department of Structural Biology, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA.,Graduate School of Biomedical Sciences, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Andrew M Davidoff
- Department of Surgery, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis TN 38105, USA
| | - Taosheng Chen
- Department of Chemical Biology and Therapeutics, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Jun Yang
- Department of Surgery, St Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis TN 38105, USA
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3
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Huang DS, LeBlanc EV, Shekhar-Guturja T, Robbins N, Krysan DJ, Pizarro J, Whitesell L, Cowen LE, Brown LE. Design and Synthesis of Fungal-Selective Resorcylate Aminopyrazole Hsp90 Inhibitors. J Med Chem 2020; 63:2139-2180. [PMID: 31513387 PMCID: PMC7069776 DOI: 10.1021/acs.jmedchem.9b00826] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The molecular chaperone Hsp90, essential in all eukaryotes, plays a multifaceted role in promoting survival, virulence, and drug resistance across diverse pathogenic fungal species. The chaperone is also critically important, however, to the pathogen's human host, preventing the use of known clinical Hsp90 inhibitors in antifungal applications due to concomitant host toxicity issues. With the goal of developing Hsp90 inhibitors with acceptable therapeutic indices for the treatment of invasive fungal infections, we initiated a program to design and synthesize potent inhibitors with selective activity against fungal Hsp90 isoforms over their human counterparts. Building on our previously reported derivatization of resorcylate natural products to produce fungal-selective compounds, we have developed a series of synthetic aminopyrazole-substituted resorcylate amides with broad, potent, and fungal-selective Hsp90 inhibitory activity. Herein we describe the synthesis of this series, as well as biochemical structure-activity relationships driving selectivity for the Hsp90 isoforms expressed by Cryptococcus neoformans and Candida albicans, two pathogenic fungi of major clinical importance.
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Affiliation(s)
- David S. Huang
- Department of Chemistry and Center for Molecular Discovery (BU-CMD), Boston University, Boston, MA, 02215, USA
| | - Emmanuelle V. LeBlanc
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, M5G 1M1, Canada
| | - Tanvi Shekhar-Guturja
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, M5G 1M1, Canada
| | - Nicole Robbins
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, M5G 1M1, Canada
| | - Damian J. Krysan
- Departments of Pediatrics and Microbiology/Immunology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, 52242, USA
| | - Juan Pizarro
- Department of Tropical Medicine, School of Public Health and Tropical Medicine and Vector-Borne Infectious Disease Research Center, Tulane University, New Orleans, LA, 70112, USA
| | - Luke Whitesell
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, M5G 1M1, Canada
| | - Leah E. Cowen
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, M5G 1M1, Canada
| | - Lauren E. Brown
- Department of Chemistry and Center for Molecular Discovery (BU-CMD), Boston University, Boston, MA, 02215, USA
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4
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Arnhold V, Schmelz K, Proba J, Winkler A, Wünschel J, Toedling J, Deubzer HE, Künkele A, Eggert A, Schulte JH, Hundsdoerfer P. Reactivating TP53 signaling by the novel MDM2 inhibitor DS-3032b as a therapeutic option for high-risk neuroblastoma. Oncotarget 2017; 9:2304-2319. [PMID: 29416773 PMCID: PMC5788641 DOI: 10.18632/oncotarget.23409] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Accepted: 12/04/2017] [Indexed: 02/06/2023] Open
Abstract
Fewer than 50% of patients with high-risk neuroblastoma survive five years after diagnosis with current treatment protocols. Molecular targeted therapies are expected to improve survival. Although MDM2 has been validated as a promising target in preclinical models, no MDM2 inhibitors have yet entered clinical trials for neuroblastoma patients. Toxic side effects, poor bioavailability and low efficacy of the available MDM2 inhibitors that have entered phase I/II trials drive the development of novel MDM2 inhibitors with an improved risk-benefit profile. We investigated the effect of the novel MDM2 small molecular inhibitor, DS-3032b, on viability, proliferation, senescence, migration, cell cycle arrest and apoptosis in a panel of six neuroblastoma cell lines with different TP53 and MYCN genetic backgrounds, and assessed efficacy in a murine subcutaneous model for high-risk neuroblastoma. Re-analysis of existing expression data from 476 primary neuroblastomas showed that high-level MDM2 expression correlated with poor patient survival. DS-3032b treatment enhanced TP53 target gene expression and induced G1 cell cycle arrest, senescence and apoptosis. CRISPR-mediated MDM2 knockout in neuroblastoma cells mimicked DS-3032b treatment. TP53 signaling was selectively activated by DS-3032b in neuroblastoma cells with wildtype TP53, regardless of the presence of MYCN amplification, but was significantly reduced by TP53 mutations or expression of a dominant-negative TP53 mutant. Oral DS-3032b administration inhibited xenograft tumor growth and prolonged mouse survival. Our in vitro and in vivo data demonstrate that DS-3032b reactivates TP53 signaling even in the presence of MYCN amplification in neuroblastoma cells, to reduce proliferative capacity and cause cytotoxicity.
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Affiliation(s)
- Viktor Arnhold
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Pediatric Hematology/Oncology/Stem Cell Transplantation, Berlin, Germany.,Berlin Institute of Health (BIH), Anna-Louisa-Karsch 2, Berlin, Germany
| | - Karin Schmelz
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Pediatric Hematology/Oncology/Stem Cell Transplantation, Berlin, Germany
| | - Jutta Proba
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Pediatric Hematology/Oncology/Stem Cell Transplantation, Berlin, Germany
| | - Annika Winkler
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Pediatric Hematology/Oncology/Stem Cell Transplantation, Berlin, Germany
| | - Jasmin Wünschel
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Pediatric Hematology/Oncology/Stem Cell Transplantation, Berlin, Germany
| | - Joern Toedling
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Pediatric Hematology/Oncology/Stem Cell Transplantation, Berlin, Germany
| | - Hedwig E Deubzer
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Pediatric Hematology/Oncology/Stem Cell Transplantation, Berlin, Germany.,Berlin Institute of Health (BIH), Anna-Louisa-Karsch 2, Berlin, Germany.,Neuroblastoma Research Group, Experimental and Clinical Research Center (ECRC), Berlin, Germany
| | - Annette Künkele
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Pediatric Hematology/Oncology/Stem Cell Transplantation, Berlin, Germany.,Berlin Institute of Health (BIH), Anna-Louisa-Karsch 2, Berlin, Germany
| | - Angelika Eggert
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Pediatric Hematology/Oncology/Stem Cell Transplantation, Berlin, Germany.,Berlin Institute of Health (BIH), Anna-Louisa-Karsch 2, Berlin, Germany.,German Cancer Consortium (DKTK), Heidelberg, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Johannes H Schulte
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Pediatric Hematology/Oncology/Stem Cell Transplantation, Berlin, Germany.,Berlin Institute of Health (BIH), Anna-Louisa-Karsch 2, Berlin, Germany.,German Cancer Consortium (DKTK), Heidelberg, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Patrick Hundsdoerfer
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Pediatric Hematology/Oncology/Stem Cell Transplantation, Berlin, Germany.,Berlin Institute of Health (BIH), Anna-Louisa-Karsch 2, Berlin, Germany
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5
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Jones L, Carol H, Evans K, Richmond J, Houghton PJ, Smith MA, Lock RB. A review of new agents evaluated against pediatric acute lymphoblastic leukemia by the Pediatric Preclinical Testing Program. Leukemia 2016; 30:2133-2141. [PMID: 27416986 DOI: 10.1038/leu.2016.192] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2016] [Revised: 05/31/2016] [Accepted: 07/04/2016] [Indexed: 02/07/2023]
Abstract
Acute lymphoblastic leukemia (ALL) in children exemplifies how multi-agent chemotherapy has improved the outcome for patients. Refinements in treatment protocols and improvements in supportive care for this most common pediatric malignancy have led to a cure rate that now approaches 90%. However, certain pediatric ALL subgroups remain relatively intractable to treatment and many patients who relapse face a similarly dismal outcome. Moreover, survivors of pediatric ALL suffer the long-term sequelae of their intensive treatment throughout their lives. Therefore, the development of drugs to treat relapsed/refractory pediatric ALL, as well as those that more specifically target leukemia cells, remains a high priority. As pediatric malignancies represent a minority of the overall cancer burden, it is not surprising that they are generally underrepresented in drug development efforts. The identification of novel therapies relies largely on the reappropriation of drugs developed for adult malignancies. However, despite the large number of experimental agents available, clinical evaluation of novel drugs for pediatric ALL is hindered by limited patient numbers and the availability of effective established drugs. The Pediatric Preclinical Testing Program (PPTP) was established in 2005 to provide a mechanism by which novel therapeutics could be evaluated against xenograft and cell line models of the most common childhood malignancies, including ALL, to prioritize those with the greatest activity for clinical evaluation. In this article, we review the results of >50 novel agents and combinations tested against the PPTP ALL xenografts, highlighting comparisons between PPTP results and clinical data where possible.
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Affiliation(s)
- L Jones
- Leukaemia Biology Program, Children's Cancer Institute, Lowy Cancer Research Centre, UNSW, Sydney, New South Wales, Australia
| | - H Carol
- Leukaemia Biology Program, Children's Cancer Institute, Lowy Cancer Research Centre, UNSW, Sydney, New South Wales, Australia
| | - K Evans
- Leukaemia Biology Program, Children's Cancer Institute, Lowy Cancer Research Centre, UNSW, Sydney, New South Wales, Australia
| | - J Richmond
- Leukaemia Biology Program, Children's Cancer Institute, Lowy Cancer Research Centre, UNSW, Sydney, New South Wales, Australia
| | - P J Houghton
- Molecular Medicine, Greehey Children's Cancer Research Institute, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - M A Smith
- Cancer Therapy Evaluation Program, NCI, Bethesda, MD, USA
| | - R B Lock
- Leukaemia Biology Program, Children's Cancer Institute, Lowy Cancer Research Centre, UNSW, Sydney, New South Wales, Australia
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6
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Advances in HSP27 and HSP90-targeting strategies for glioblastoma. J Neurooncol 2016; 127:209-19. [PMID: 26842818 DOI: 10.1007/s11060-016-2070-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 01/26/2016] [Indexed: 12/20/2022]
Abstract
Glioblastoma (GBM) is the most common and malignant primary brain tumor in adults. There is a critical need for novel strategies to abolish the molecular mechanisms that support GBM growth, invasion and treatment resistance. The heat shock proteins, HSP27 and HSP90, serve these pivotal roles in tumor cells and have been identified as effective targets for developing therapeutics. Natural and synthetic inhibitors have been evaluated in clinical trials for several forms of systemic cancer but none as yet for GBM. This topic review summarizes the current preclinical evidence and rationale to define the potential of HSP27 and HSP90 inhibitors in GBM management.
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7
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Saletta F, Wadham C, Ziegler DS, Marshall GM, Haber M, McCowage G, Norris MD, Byrne JA. Molecular profiling of childhood cancer: Biomarkers and novel therapies. BBA CLINICAL 2014; 1:59-77. [PMID: 26675306 PMCID: PMC4633945 DOI: 10.1016/j.bbacli.2014.06.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 06/16/2014] [Accepted: 06/24/2014] [Indexed: 12/11/2022]
Abstract
BACKGROUND Technological advances including high-throughput sequencing have identified numerous tumor-specific genetic changes in pediatric and adolescent cancers that can be exploited as targets for novel therapies. SCOPE OF REVIEW This review provides a detailed overview of recent advances in the application of target-specific therapies for childhood cancers, either as single agents or in combination with other therapies. The review summarizes preclinical evidence on which clinical trials are based, early phase clinical trial results, and the incorporation of predictive biomarkers into clinical practice, according to cancer type. MAJOR CONCLUSIONS There is growing evidence that molecularly targeted therapies can valuably add to the arsenal available for treating childhood cancers, particularly when used in combination with other therapies. Nonetheless the introduction of molecularly targeted agents into practice remains challenging, due to the use of unselected populations in some clinical trials, inadequate methods to evaluate efficacy, and the need for improved preclinical models to both evaluate dosing and safety of combination therapies. GENERAL SIGNIFICANCE The increasing recognition of the heterogeneity of molecular causes of cancer favors the continued development of molecularly targeted agents, and their transfer to pediatric and adolescent populations.
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Key Words
- ALK, anaplastic lymphoma kinase
- ALL, acute lymphoblastic leukemia
- AML, acute myeloid leukemia
- ARMS, alveolar rhabdomyosarcoma
- AT/RT, atypical teratoid/rhabdoid tumor
- AURKA, aurora kinase A
- AURKB, aurora kinase B
- BET, bromodomain and extra terminal
- Biomarkers
- CAR, chimeric antigen receptor
- CML, chronic myeloid leukemia
- Childhood cancer
- DFMO, difluoromethylornithine
- DIPG, diffuse intrinsic pontine glioma
- EGFR, epidermal growth factor receptor
- ERMS, embryonal rhabdomyosarcoma
- HDAC, histone deacetylases
- Hsp90, heat shock protein 90
- IGF-1R, insulin-like growth factor type 1 receptor
- IGF/IGFR, insulin-like growth factor/receptor
- Molecular diagnostics
- NSCLC, non-small cell lung cancer
- ODC1, ornithine decarboxylase 1
- PARP, poly(ADP-ribose) polymerase
- PDGFRA/B, platelet derived growth factor alpha/beta
- PI3K, phosphatidylinositol 3′-kinase
- PLK1, polo-like kinase 1
- Ph +, Philadelphia chromosome-positive
- RMS, rhabdomyosarcoma
- SHH, sonic hedgehog
- SMO, smoothened
- SYK, spleen tyrosine kinase
- TOP1/TOP2, DNA topoisomerase 1/2
- TRAIL, TNF-related apoptosis-inducing ligand
- Targeted therapy
- VEGF/VEGFR, vascular endothelial growth factor/receptor
- mAb, monoclonal antibody
- mAbs, monoclonal antibodies
- mTOR, mammalian target of rapamycin
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Affiliation(s)
- Federica Saletta
- Children's Cancer Research Unit, Kids Research Institute, Westmead 2145, New South Wales, Australia
| | - Carol Wadham
- Children's Cancer Institute Australia, Lowy Cancer Research Centre, UNSW, Randwick 2031, New South Wales, Australia
| | - David S. Ziegler
- Children's Cancer Institute Australia, Lowy Cancer Research Centre, UNSW, Randwick 2031, New South Wales, Australia
- Kids Cancer Centre, Sydney Children's Hospital, Randwick 2031, New South Wales, Australia
| | - Glenn M. Marshall
- Children's Cancer Institute Australia, Lowy Cancer Research Centre, UNSW, Randwick 2031, New South Wales, Australia
- Kids Cancer Centre, Sydney Children's Hospital, Randwick 2031, New South Wales, Australia
| | - Michelle Haber
- Children's Cancer Institute Australia, Lowy Cancer Research Centre, UNSW, Randwick 2031, New South Wales, Australia
| | - Geoffrey McCowage
- The Children's Hospital at Westmead, Westmead 2145, New South Wales, Australia
| | - Murray D. Norris
- Children's Cancer Institute Australia, Lowy Cancer Research Centre, UNSW, Randwick 2031, New South Wales, Australia
| | - Jennifer A. Byrne
- Children's Cancer Research Unit, Kids Research Institute, Westmead 2145, New South Wales, Australia
- The University of Sydney Discipline of Paediatrics and Child Health, The Children's Hospital at Westmead, Westmead 2145, New South Wales, Australia
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8
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Houghton PJ. New insights into drug development for pediatric solid tumors: what preclinical data justify clinical trials in pediatric cancer? Expert Rev Anticancer Ther 2013; 13:1135-8. [PMID: 24093514 DOI: 10.1586/14737140.2013.845094] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Peter J Houghton
- Center for Childhood Cancer, The Research Institute, Nationwide Children's Hospital, 700 Children's Drive, Columbus, OH 43205, USA +1 614 355 2670 +1 614 355 2927
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9
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Liu H, Xiao F, Serebriiskii IG, O’Brien SW, Maglaty MA, Astsaturov I, Litwin S, Martin LP, Proia DA, Golemis EA, Connolly DC. Network analysis identifies an HSP90-central hub susceptible in ovarian cancer. Clin Cancer Res 2013; 19:5053-67. [PMID: 23900136 PMCID: PMC3778161 DOI: 10.1158/1078-0432.ccr-13-1115] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
PURPOSE Epithelial ovarian cancer (EOC) is usually detected at an advanced stage and is frequently lethal. Although many patients respond to initial surgery and standard chemotherapy consisting of a platinum-based agent and a taxane, most experience recurrence and eventually treatment-resistant disease. Although there have been numerous efforts to apply protein-targeted agents in EOC, these studies have so far documented little efficacy. Our goal was to identify broadly susceptible signaling proteins or pathways in EOC. EXPERIMENTAL DESIGN As a new approach, we conducted data-mining meta-analyses integrating results from multiple siRNA screens to identify gene targets that showed significant inhibition of cell growth. On the basis of this meta-analysis, we established that many genes with such activity were clients of the protein chaperone HSP90. We therefore assessed ganetespib, a clinically promising second-generation small-molecule HSP90 inhibitor, for activity against EOC, both as a single agent and in combination with cytotoxic and targeted therapeutic agents. RESULTS Ganetespib significantly reduced cell growth, induced cell-cycle arrest and apoptosis in vitro, inhibited growth of orthotopic xenografts and spontaneous ovarian tumors in transgenic mice in vivo, and inhibited expression and activation of numerous proteins linked to EOC progression. Importantly, paclitaxel significantly potentiated ganetespib activity in cultured cells and tumors. Moreover, combined treatment of cells with ganetespib and siRNAs or small molecules inhibiting genes identified in the meta-analysis in several cases resulted in enhanced activity. CONCLUSION These results strongly support investigation of ganetespib, a single-targeted agent with effects on numerous proteins and pathways, in augmenting standard EOC therapies.
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Affiliation(s)
- Hanqing Liu
- Developmental Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, USA
| | - Fang Xiao
- Developmental Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, USA
| | - Ilya G. Serebriiskii
- Developmental Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, USA
| | - Shane W. O’Brien
- Developmental Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, USA
| | - Marisa A. Maglaty
- Developmental Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, USA
| | - Igor Astsaturov
- Developmental Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, USA
| | - Samuel Litwin
- Biostatistics Facility, Fox Chase Cancer Center, Philadelphia, PA, USA
| | - Lainie P. Martin
- Developmental Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, USA
- Department of Medical Oncology, Fox Chase Cancer Center, Philadelphia, PA, USA
| | | | - Erica A. Golemis
- Developmental Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, USA
| | - Denise C. Connolly
- Developmental Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, USA
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Sampson VB, Kamara DF, Kolb EA. Xenograft and genetically engineered mouse model systems of osteosarcoma and Ewing's sarcoma: tumor models for cancer drug discovery. Expert Opin Drug Discov 2013; 8:1181-9. [PMID: 23844615 DOI: 10.1517/17460441.2013.817988] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
INTRODUCTION There are > 75 histological types of solid tumors that are classified into two major groups: bone and soft-tissue sarcomas. These diseases are more prevalent in children, and pediatric sarcomas tend to be highly aggressive and rapidly progressive. Sarcomas in adults may follow a more indolent course, but aggressive tumors are also common. Sarcomas that are metastatic at diagnosis, or recurrent following therapy, remain refractory to current treatment options with dismal overall survival rates. A major focus of clinical trials, for patients with sarcoma, is to identify novel and more effective therapeutic strategies targeted to genomic or proteomic aberrations specific to the malignant cells. Critical to the understanding of the potential for targeted therapies are models of disease that are representative of clinical disease and predictive of relevant clinical responses. AREAS COVERED In this article, the authors discuss the use of mouse xenograft models and genetically engineered mice in cancer drug discovery. The authors provide a special focus on models for the two most common bone sarcomas: osteosarcoma (OS) and Ewing's sarcoma (ES). EXPERT OPINION Predicting whether a new anticancer agent will have a positive therapeutic index in patients with OS and ES remains a challenge. The use of mouse sarcoma models for understanding the mechanisms involved in the response of tumors to new treatments is an important step in the process of drug discovery and the development of clinically relevant therapeutic strategies for these diseases.
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Affiliation(s)
- Valerie B Sampson
- A.I. duPont Hospital for Children, Cancer Therapeutics Laboratory , 1701 Rockland Rd, Wilmington DE, 19803 , USA
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