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Abstract
Monoclonal antibodies (mAbs) are immunoglobulins designed to target a specific epitope on an antigen. Immunoglobulins of identical amino-acid sequence were originally produced by hybridomas grown in culture and, subsequently, by recombinant DNA technology using mammalian cell expression systems. The antigen-binding region of the mAb is formed by the variable domains of the heavy and light chains and contains the complementarity-determining region that imparts the high specificity for the target antigen. The pharmacokinetics of mAbs involves target-mediated and non-target-related factors that influence their disposition.Preclinical safety evaluation of mAbs differs substantially from that of small molecular (chemical) entities. Immunogenicity of mAbs has implications for their pharmacokinetics and safety. Early studies of mAbs in humans require careful consideration of the most suitable study population, route/s of administration, starting dose, study design and the potential difference in pharmacokinetics in healthy subjects compared to patients expressing the target antigen.Of the ever-increasing diversity of therapeutic indications for mAbs, we have concentrated on two that have proved dramatically successful. The contribution that mAbs have made to the treatment of inflammatory conditions, in particular arthritides and inflammatory bowel disease, has been nothing short of revolutionary. Their benefit has also been striking in the treatment of solid tumours and, most recently, as immunotherapy for a wide variety of cancers. Finally, we speculate on the future with various new approaches to the development of therapeutic antibodies.
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Xie K, Song S, Zhou L, Wan J, Qiao Y, Wang M, Xie H, Zhou L, Zheng S, Wang H. Revival of a potent therapeutic maytansinoid agent using a strategy that combines covalent drug conjugation with sequential nanoparticle assembly. Int J Pharm 2018; 556:159-171. [PMID: 30553007 DOI: 10.1016/j.ijpharm.2018.12.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 11/10/2018] [Accepted: 12/03/2018] [Indexed: 01/16/2023]
Abstract
Maytansine and its related analogues are a class of highly potent anti-proliferation agents that have failed to be exploited as clinical drugs for human therapy due to unacceptable systemic toxicity. Here, we delineate a novel strategy that combines rational drug conjugation with subsequent nanoparticle assembly to systemically deliver this highly potent and toxic drug. To demonstrate this concept, we covalently coupled the thiolated maytansine derivative, the DM1 agent, to amphiphilic block co-polymers, polyethylene glycol (PEG)-block-polylactide (PLA), in varying molecular weights to generate two prodrug constructs (i.e., PEG2K-PLA2K-DM1 and PEG2K-PLA4K-DM1) via the maleimide-thiol reaction. The resulting two constructs are amenable to self-assembly in aqueous solutions and are systemically injectable for preclinical studies. In vivo evaluations indicate that PEG-PLA-DM1 conjugate-assembled nanoparticles (NPs) display substantially reduced drug toxicity compared to the free drug forms and NPs that physically encapsulate DM1. Furthermore, following systemic administration, these nanodrugs produced superior therapeutic efficacy over free DM1 in a colon tumor xenograft-bearing mouse model. Therefore, this study provides evidence that the conjugation of toxic drugs to assembling copolymers enables the alleviation of cancer drug toxicity and effective delivery of anticancer drugs. Thus, this DM1-formulated platform represents a new generation of nanotherapeutics that are available for further clinical evaluation.
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Affiliation(s)
- Ke Xie
- The First Affiliated Hospital, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Key Laboratory of Combined Multi-Organ Transplantation, Ministry of Public Health, School of Medicine, Zhejiang University, Hangzhou 310003, PR China
| | - Shanshan Song
- Institute of Microanalytical Systems, Department of Chemistry, Zhejiang University, Hangzhou 310058, PR China
| | - Liqian Zhou
- The First Affiliated Hospital, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Key Laboratory of Combined Multi-Organ Transplantation, Ministry of Public Health, School of Medicine, Zhejiang University, Hangzhou 310003, PR China
| | - Jianqin Wan
- The First Affiliated Hospital, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Key Laboratory of Combined Multi-Organ Transplantation, Ministry of Public Health, School of Medicine, Zhejiang University, Hangzhou 310003, PR China
| | - Yiting Qiao
- The First Affiliated Hospital, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Key Laboratory of Combined Multi-Organ Transplantation, Ministry of Public Health, School of Medicine, Zhejiang University, Hangzhou 310003, PR China
| | - Min Wang
- Institute of Microanalytical Systems, Department of Chemistry, Zhejiang University, Hangzhou 310058, PR China
| | - Haiyang Xie
- The First Affiliated Hospital, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Key Laboratory of Combined Multi-Organ Transplantation, Ministry of Public Health, School of Medicine, Zhejiang University, Hangzhou 310003, PR China
| | - Lin Zhou
- The First Affiliated Hospital, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Key Laboratory of Combined Multi-Organ Transplantation, Ministry of Public Health, School of Medicine, Zhejiang University, Hangzhou 310003, PR China
| | - Shusen Zheng
- The First Affiliated Hospital, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Key Laboratory of Combined Multi-Organ Transplantation, Ministry of Public Health, School of Medicine, Zhejiang University, Hangzhou 310003, PR China.
| | - Hangxiang Wang
- The First Affiliated Hospital, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Key Laboratory of Combined Multi-Organ Transplantation, Ministry of Public Health, School of Medicine, Zhejiang University, Hangzhou 310003, PR China.
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Moore KN, O'Malley DM, Vergote I, Martin LP, Gonzalez-Martin A, Malek K, Birrer MJ. Safety and activity findings from a phase 1b escalation study of mirvetuximab soravtansine, a folate receptor alpha (FRα)-targeting antibody-drug conjugate (ADC), in combination with carboplatin in patients with platinum-sensitive ovarian cancer. Gynecol Oncol 2018; 151:46-52. [DOI: 10.1016/j.ygyno.2018.07.017] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 07/18/2018] [Accepted: 07/21/2018] [Indexed: 02/06/2023]
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Moore KN, Vergote I, Oaknin A, Colombo N, Banerjee S, Oza A, Pautier P, Malek K, Birrer MJ. FORWARD I: a Phase III study of mirvetuximab soravtansine versus chemotherapy in platinum-resistant ovarian cancer. Future Oncol 2018; 14:1669-1678. [DOI: 10.2217/fon-2017-0646] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Mirvetuximab soravtansine, an antibody–drug conjugate that binds with high affinity to folate receptor-α to provide tumor-directed delivery of the potent microtubule-disrupting agent DM4, has emerged as a promising investigational agent for the treatment of ovarian cancer, particularly in the setting of platinum-resistant disease. Here we describe the rationale and design of FORWARD I (NCT02631876), the first randomized, multicenter Phase III study to compare the safety and efficacy of mirvetuximab soravtansine versus investigator's choice of chemotherapy in women with folate receptor-α-positive, platinum-resistant epithelial ovarian, primary peritoneal or fallopian tube cancer. Patients will be randomized in a 2:1 ratio. The primary end point is progression-free survival, and key secondary objectives include comparison of overall response rates, overall survival and duration of response.
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Affiliation(s)
- Kathleen N Moore
- Department of Obstetrics & Gynecology, Stephenson Oklahoma Cancer Center at the University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Ignace Vergote
- Gynaecological Oncology, Leuven Cancer Institute, Leuven 3000, Belgium
| | - Ana Oaknin
- Medical Oncology Department, Vall D'Hebron Institute of Oncology (VHIO), Barcelona 08035, Spain
| | - Nicoletta Colombo
- Gynecologic Oncology, The European Institute of Oncology, Milan 20141, Italy
| | - Susana Banerjee
- Gynaecology Unit, Royal Marsden Hospital, London, SW3 6JJ, UK
| | - Amit Oza
- Division of Medical Oncology & Hematology, Princess Margaret Cancer Centre, Toronto M5G 2M9, Canada
| | - Patricia Pautier
- Department of Adult Medicine, Gustave Roussy Cancer Campus, Villejuif 94800, France
| | - Karim Malek
- Clinical Development, ImmunoGen, Inc., Waltham, MA 02451, USA
| | - Michael J Birrer
- Division of Hematology–Oncology, University of Alabama at Birmingham Comprehensive Cancer Center, Birmingham, AL 35294, USA
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Lee BC, Chalouni C, Doll S, Nalle SC, Darwish M, Tsai SP, Kozak KR, Del-Rosario G, Yu SF, Erickson H, Vandlen R. FRET Reagent Reveals the Intracellular Processing of Peptide-Linked Antibody–Drug Conjugates. Bioconjug Chem 2018; 29:2468-2477. [DOI: 10.1021/acs.bioconjchem.8b00362] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Byoung-Chul Lee
- Department of Protein Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Cecile Chalouni
- Department of Pathology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Sophia Doll
- Department of Protein Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
- Department of Pathology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Sam C. Nalle
- Department of Cancer Immunology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Martine Darwish
- Department of Protein Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Siao Ping Tsai
- Department of Biochemical and Cellular Pharmacology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Katherine R. Kozak
- Department of Biochemical and Cellular Pharmacology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Geoffrey Del-Rosario
- Department of Translational Oncology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Shang-Fan Yu
- Department of Translational Oncology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Hans Erickson
- Department of Protein Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Richard Vandlen
- Department of Protein Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
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56
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Menchon G, Prota AE, Lucena-Agell D, Bucher P, Jansen R, Irschik H, Müller R, Paterson I, Díaz JF, Altmann KH, Steinmetz MO. A fluorescence anisotropy assay to discover and characterize ligands targeting the maytansine site of tubulin. Nat Commun 2018; 9:2106. [PMID: 29844393 PMCID: PMC5974090 DOI: 10.1038/s41467-018-04535-8] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 05/01/2018] [Indexed: 01/26/2023] Open
Abstract
Microtubule-targeting agents (MTAs) like taxol and vinblastine are among the most successful chemotherapeutic drugs against cancer. Here, we describe a fluorescence anisotropy-based assay that specifically probes for ligands targeting the recently discovered maytansine site of tubulin. Using this assay, we have determined the dissociation constants of known maytansine site ligands, including the pharmacologically active degradation product of the clinical antibody-drug conjugate trastuzumab emtansine. In addition, we discovered that the two natural products spongistatin-1 and disorazole Z with established cellular potency bind to the maytansine site on β-tubulin. The high-resolution crystal structures of spongistatin-1 and disorazole Z in complex with tubulin allowed the definition of an additional sub-site adjacent to the pocket shared by all maytansine-site ligands, which could be exploitable as a distinct, separate target site for small molecules. Our study provides a basis for the discovery and development of next-generation MTAs for the treatment of cancer.
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Affiliation(s)
- Grégory Menchon
- Laboratory of Biomolecular Research, Division of Biology and Chemistry, Paul Scherrer Institut, Villigen PSI, 5232, Switzerland
| | - Andrea E Prota
- Laboratory of Biomolecular Research, Division of Biology and Chemistry, Paul Scherrer Institut, Villigen PSI, 5232, Switzerland
| | - Daniel Lucena-Agell
- Chemical and Physical Biology, Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Cientificas CIB-CSIC, Madrid, 28040, Spain
| | - Pascal Bucher
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, ETH Zürich, Zürich, 8093, Switzerland
| | - Rolf Jansen
- Abteilung Mikrobielle Wirkstoffe, Helmholtz Zentrum für Infektionsforschung, Braunschweig, 38124, Germany
| | - Herbert Irschik
- Abteilung Mikrobielle Wirkstoffe, Helmholtz Zentrum für Infektionsforschung, Braunschweig, 38124, Germany
| | - Rolf Müller
- Department Microbial Natural Products and Department of Pharmacy at Saarland University, Helmholtz Institute for Pharmaceutical Research Saarland, Helmholtz Centre for Infection Research, Saarbrücken, 66123, Germany
| | - Ian Paterson
- University Chemical Laboratory, Cambridge University, Cambridge, CB2 1EW, UK
| | - J Fernando Díaz
- Chemical and Physical Biology, Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Cientificas CIB-CSIC, Madrid, 28040, Spain
| | - Karl-Heinz Altmann
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, ETH Zürich, Zürich, 8093, Switzerland
| | - Michel O Steinmetz
- Laboratory of Biomolecular Research, Division of Biology and Chemistry, Paul Scherrer Institut, Villigen PSI, 5232, Switzerland.
- University of Basel, Biozentrum, Basel, 4056, Switzerland.
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57
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Abrams T, Connor A, Fanton C, Cohen SB, Huber T, Miller K, Hong EE, Niu X, Kline J, Ison-Dugenny M, Harris S, Walker D, Krauser K, Galimi F, Wang Z, Ghoddusi M, Mansfield K, Lee-Hoeflich ST, Holash J, Pryer N, Kluwe W, Ettenberg SA, Sellers WR, Lees E, Kwon P, Abraham JA, Schleyer SC. Preclinical Antitumor Activity of a Novel Anti-c-KIT Antibody-Drug Conjugate against Mutant and Wild-type c-KIT-Positive Solid Tumors. Clin Cancer Res 2018; 24:4297-4308. [PMID: 29764854 DOI: 10.1158/1078-0432.ccr-17-3795] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 04/13/2018] [Accepted: 05/10/2018] [Indexed: 11/16/2022]
Abstract
Purpose: c-KIT overexpression is well recognized in cancers such as gastrointestinal stromal tumors (GIST), small cell lung cancer (SCLC), melanoma, non-small cell lung cancer (NSCLC), and acute myelogenous leukemia (AML). Treatment with the small-molecule inhibitors imatinib, sunitinib, and regorafenib resulted in resistance (c-KIT mutant tumors) or limited activity (c-KIT wild-type tumors). We selected an anti-c-KIT ADC approach to evaluate the anticancer activity in multiple disease models.Experimental Design: A humanized anti-c-KIT antibody LMJ729 was conjugated to the microtubule destabilizing maytansinoid, DM1, via a noncleavable linker (SMCC). The activity of the resulting ADC, LOP628, was evaluated in vitro against GIST, SCLC, and AML models and in vivo against GIST and SCLC models.Results: LOP628 exhibited potent antiproliferative activity on c-KIT-positive cell lines, whereas LMJ729 displayed little to no effect. At exposures predicted to be clinically achievable, LOP628 demonstrated single administration regressions or stasis in GIST and SCLC xenograft models in mice. LOP628 also displayed superior efficacy in an imatinib-resistant GIST model. Further, LOP628 was well tolerated in monkeys with an adequate therapeutic index several fold above efficacious exposures. Safety findings were consistent with the pharmacodynamic effect of neutropenia due to c-KIT-directed targeting. Additional toxicities were considered off-target and were consistent with DM1, such as effects in the liver and hematopoietic/lymphatic system.Conclusions: The preclinical findings suggest that the c-KIT-directed ADC may be a promising therapeutic for the treatment of mutant and wild-type c-KIT-positive cancers and supported the clinical evaluation of LOP628 in GIST, AML, and SCLC patients. Clin Cancer Res; 24(17); 4297-308. ©2018 AACR.
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Affiliation(s)
- Tinya Abrams
- Novartis Institutes of Biomedical Research, Emeryville, California.
| | - Anu Connor
- Novartis Institutes of Biomedical Research, Cambridge, Massachusetts
| | - Christie Fanton
- Novartis Institutes of Biomedical Research, Emeryville, California
| | - Steven B Cohen
- Genomics Institute of the Novartis Institute Foundation, San Diego, California
| | - Thomas Huber
- Novartis Institutes of Biomedical Research, Campus Klybeckstrasse, Basel, Switzerland
| | - Kathy Miller
- Novartis Institutes of Biomedical Research, Emeryville, California
| | | | - Xiaohong Niu
- Novartis Institutes of Biomedical Research, Emeryville, California
| | - Janine Kline
- Novartis Institutes of Biomedical Research, Emeryville, California
| | | | - Sarah Harris
- Genomics Institute of the Novartis Institute Foundation, San Diego, California
| | - Dana Walker
- Novartis Institutes of Biomedical Research, Cambridge, Massachusetts
| | - Klaus Krauser
- Genomics Institute of the Novartis Institute Foundation, San Diego, California
| | - Francesco Galimi
- Genomics Institute of the Novartis Institute Foundation, San Diego, California
| | - Zhen Wang
- Novartis Institutes of Biomedical Research, Emeryville, California
| | - Majid Ghoddusi
- Novartis Institutes of Biomedical Research, Emeryville, California
| | - Keith Mansfield
- Novartis Institutes of Biomedical Research, Cambridge, Massachusetts
| | | | - Jocelyn Holash
- Novartis Institutes of Biomedical Research, Emeryville, California
| | - Nancy Pryer
- Novartis Institutes of Biomedical Research, Emeryville, California
| | - William Kluwe
- Novartis Pharmaceuticals Corporation, East Hanover, New Jersey
| | - Seth A Ettenberg
- Novartis Institutes of Biomedical Research, Cambridge, Massachusetts
| | - William R Sellers
- Novartis Institutes of Biomedical Research, Cambridge, Massachusetts
| | - Emma Lees
- Novartis Institutes of Biomedical Research, Emeryville, California
| | - Paul Kwon
- Novartis Institutes of Biomedical Research, Emeryville, California
| | - Judith A Abraham
- Novartis Institutes of Biomedical Research, Emeryville, California
| | - Siew C Schleyer
- Novartis Institutes of Biomedical Research, Emeryville, California
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58
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Li G, Guo J, Shen BQ, Yadav DB, Sliwkowski MX, Crocker LM, Lacap JA, Phillips GDL. Mechanisms of Acquired Resistance to Trastuzumab Emtansine in Breast Cancer Cells. Mol Cancer Ther 2018; 17:1441-1453. [PMID: 29695635 DOI: 10.1158/1535-7163.mct-17-0296] [Citation(s) in RCA: 111] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 08/03/2017] [Accepted: 04/12/2018] [Indexed: 11/16/2022]
Abstract
The receptor tyrosine kinase HER2 is overexpressed in approximately 20% of breast cancer, and its amplification is associated with reduced survival. Trastuzumab emtansine (Kadcyla, T-DM1), an antibody-drug conjugate that is comprised of trastuzumab covalently linked to the antimitotic agent DM1 through a stable linker, was designed to selectively deliver DM1 to HER2-overexpressing tumor cells. T-DM1 is approved for the treatment of patients with HER2-positive metastatic breast cancer following progression on trastuzumab and a taxane. Despite the improvement in clinical outcome, many patients who initially respond to T-DM1 treatment eventually develop progressive disease. The mechanisms that contribute to T-DM1 resistance are not fully understood. To this end, we developed T-DM1-resistant in vitro models to examine the mechanisms of acquired T-DM1 resistance. We demonstrate that decreased HER2 and upregulation of MDR1 contribute to T-DM1 resistance in KPL-4 T-DM1-resistant cells. In contrast, both loss of SLC46A3 and PTEN deficiency play a role in conferring resistance in BT-474M1 T-DM1-resistant cells. Our data suggest that these two cell lines acquire resistance through distinct mechanisms. Furthermore, we show that the KPL-4 T-DM1 resistance can be overcome by treatment with an inhibitor of MDR1, whereas a PI3K inhibitor can rescue PTEN loss-induced resistance in T-DM1-resistant BT-474M1 cells. Our results provide a rationale for developing therapeutic strategies to enhance T-DM1 clinical efficacy by combining T-DM1 and other inhibitors that target signaling transduction or resistance pathways. Mol Cancer Ther; 17(7); 1441-53. ©2018 AACR.
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Affiliation(s)
- Guangmin Li
- Department of Translational Oncology, Genentech, Inc., South San Francisco, California.
| | - Jun Guo
- Department of Translational Oncology, Genentech, Inc., South San Francisco, California
| | - Ben-Quan Shen
- Department of Preclinical and Translational Pharmacokinetics, Genentech, Inc., South San Francisco, California
| | - Daniela Bumbaca Yadav
- Department of Preclinical and Translational Pharmacokinetics, Genentech, Inc., South San Francisco, California
| | - Mark X Sliwkowski
- Department of Translational Oncology, Genentech, Inc., South San Francisco, California
| | - Lisa M Crocker
- Department of Translational Oncology, Genentech, Inc., South San Francisco, California
| | - Jennifer A Lacap
- Department of Translational Oncology, Genentech, Inc., South San Francisco, California
| | - Gail D Lewis Phillips
- Department of Translational Oncology, Genentech, Inc., South San Francisco, California
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59
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Saatci Ö, Borgoni S, Akbulut Ö, Durmuş S, Raza U, Eyüpoğlu E, Alkan C, Akyol A, Kütük Ö, Wiemann S, Şahin Ö. Targeting PLK1 overcomes T-DM1 resistance via CDK1-dependent phosphorylation and inactivation of Bcl-2/xL in HER2-positive breast cancer. Oncogene 2018; 37:2251-2269. [PMID: 29391599 DOI: 10.1038/s41388-017-0108-9] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Revised: 10/22/2017] [Accepted: 11/12/2017] [Indexed: 12/18/2022]
Abstract
Trastuzumab-refractory, HER2 (human epidermal growth factor receptor 2)-positive breast cancer is commonly treated with trastuzumab emtansine (T-DM1), an antibody-drug conjugate of trastuzumab and the microtubule-targeting agent, DM1. However, drug response reduces greatly over time due to acquisition of resistance whose molecular mechanisms are mostly unknown. Here, we uncovered a novel mechanism of resistance against T-DM1 by combining whole transcriptome sequencing (RNA-Seq), proteomics and a targeted small interfering RNA (siRNA) sensitization screen for molecular level analysis of acquired and de novo T-DM1-resistant models of HER2-overexpressing breast cancer. We identified Polo-like kinase 1 (PLK1), a mitotic kinase, as a resistance mediator whose genomic as well as pharmacological inhibition restored drug sensitivity. Both acquired and de novo resistant models exhibited synergistic growth inhibition upon combination of T-DM1 with a selective PLK1 inhibitor, volasertib, at a wide concentration range of the two drugs. Mechanistically, T-DM1 sensitization upon PLK1 inhibition with volasertib was initiated by a spindle assembly checkpoint (SAC)-dependent mitotic arrest, leading to caspase activation, followed by DNA damage through CDK1-dependent phosphorylation and inactivation of Bcl-2/xL. Furthermore, we showed that Ser70 phosphorylation of Bcl-2 directly regulates apoptosis by disrupting the binding to and sequestration of the pro-apoptotic protein Bim. Importantly, T-DM1 resistance signature or PLK1 expression correlated with cell cycle progression and DNA repair, and predicted a lower sensitivity to taxane/trastuzumab combination in HER2-positive breast cancer patients. Finally, volasertib in combination with T-DM1 greatly synergized in models of T-DM1 resistance in terms of growth inhibition both in three dimensional (3D) cell culture and in vivo. Altogether, our results provide promising pre-clinical evidence for potential testing of T-DM1/volasertib combination in T-DM1 refractory HER2-positive breast cancer patients for whom there is currently no treatment available.
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Affiliation(s)
- Özge Saatci
- Department of Molecular Biology and Genetics, Faculty of Science, Bilkent University, 06800, Ankara, Turkey
| | - Simone Borgoni
- Division of Molecular Genome Analysis, German Cancer Research Center (DKFZ), INF580, Heidelberg, 69120, Germany
| | - Özge Akbulut
- Department of Molecular Biology and Genetics, Faculty of Science, Bilkent University, 06800, Ankara, Turkey
| | - Selvi Durmuş
- Department of Molecular Biology and Genetics, Faculty of Science, Bilkent University, 06800, Ankara, Turkey
| | - Umar Raza
- Department of Molecular Biology and Genetics, Faculty of Science, Bilkent University, 06800, Ankara, Turkey
| | - Erol Eyüpoğlu
- Department of Molecular Biology and Genetics, Faculty of Science, Bilkent University, 06800, Ankara, Turkey
| | - Can Alkan
- Department of Computer Engineering, Bilkent University, 06800, Ankara, Turkey
| | - Aytekin Akyol
- Department of Pathology, Hacettepe University School of Medicine, 06410, Ankara, Turkey
| | - Özgür Kütük
- Department of Medical Genetics, Başkent University, 01250, Adana, Turkey
| | - Stefan Wiemann
- Division of Molecular Genome Analysis, German Cancer Research Center (DKFZ), INF580, Heidelberg, 69120, Germany
| | - Özgür Şahin
- Department of Molecular Biology and Genetics, Faculty of Science, Bilkent University, 06800, Ankara, Turkey.
- National Nanotechnology Research Center (UNAM), Bilkent University, 06800, Ankara, Turkey.
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60
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Chalouni C, Doll S. Fate of Antibody-Drug Conjugates in Cancer Cells. J Exp Clin Cancer Res 2018; 37:20. [PMID: 29409507 PMCID: PMC5802061 DOI: 10.1186/s13046-017-0667-1] [Citation(s) in RCA: 120] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 12/15/2017] [Indexed: 02/08/2023] Open
Abstract
Antibody-Drug Conjugates (ADCs) are a class of cancer therapeutics that combines antigen specificity and potent cytotoxicity in a single molecule as they are comprised of an engineered antibody linked chemically to a cytotoxic drug. Four ADCs have received approval by the Food and Drug Administration (FDA) and the European Medicine Agency (EMA) and can be prescribed for metastatic conditions while around 60 ADCs are currently enrolled in clinical trials. The efficacy of an ADC greatly relies on its intracellular trafficking and processing of its components to trigger tumor cell death. A limited number of studies have addressed these critical processes that both challenge and help foster the design of ADCs. This review highlights those mechanisms and their relevance for future development of ADCs as cancer therapeutics.
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61
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Taplin S, Vashisht K, Walles M, Calise D, Kluwe W, Bouchard P, Johnson R. Hepatotoxicity with antibody maytansinoid conjugates: A review of preclinical and clinical findings. J Appl Toxicol 2018; 38:600-615. [DOI: 10.1002/jat.3582] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Revised: 11/29/2017] [Accepted: 11/30/2017] [Indexed: 01/19/2023]
Affiliation(s)
- Sarah Taplin
- Novartis Pharmaceuticals Inc.; East Hanover NJ USA
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62
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Moore KN, Martin LP, O'Malley DM, Matulonis UA, Konner JA, Vergote I, Ponte JF, Birrer MJ. A review of mirvetuximab soravtansine in the treatment of platinum-resistant ovarian cancer. Future Oncol 2018; 14:123-136. [DOI: 10.2217/fon-2017-0379] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Resistance to platinum-based therapy poses a significant clinical challenge for the management of advanced ovarian cancer, a leading cause of cancer mortality among women. Mirvetuximab soravtansine is a novel antibody–drug conjugate that targets folate receptor-α, a validated molecular target for therapeutic intervention in this disease. Here, we examine mirvetuximab soravtansine's mechanism of action and pharmacology, and review its clinical evaluation in ovarian cancer to date. We focus on the favorable tolerability and encouraging signals of efficacy that have emerged, most notably in patients with platinum-resistant disease. Ongoing Phase III monotherapy and Phase Ib/II combination trials evaluating its activity in the setting of platinum resistance are emphasized, which will help define its role in the evolving landscape of ovarian cancer therapy.
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Affiliation(s)
- Kathleen N Moore
- Department of Obstetrics & Gynecology, Stephenson Oklahoma Cancer Center at the University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Lainie P Martin
- Department of Hematology/Oncology, Fox Chase Cancer Center, Philadelphia, PA 19111, USA
| | - David M O'Malley
- Department of Obstetrics & Gynecology, The Ohio State University, Columbus, OH 43210, USA
| | - Ursula A Matulonis
- Department of Medical Oncology, Dana Farber Cancer Institute, Boston, MA 02115, USA
| | - Jason A Konner
- Medical Oncology, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Ignace Vergote
- Gynaecological Oncology, Leuven Cancer Institute, Leuven 3000, Belgium
| | - Jose F Ponte
- Pharmacology, ImmunoGen, Inc, Waltham, MA 02451, USA
| | - Michael J Birrer
- Gillette Center for Gynecologic Oncology, Massachusetts General Hospital, Boston, MA 02114, USA
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Antibody–Drug Conjugates for the Treatment of Solid Tumors: Clinical Experience and Latest Developments. Target Oncol 2017; 12:719-739. [DOI: 10.1007/s11523-017-0535-0] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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64
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Martin LP, Konner JA, Moore KN, Seward SM, Matulonis UA, Perez RP, Su Y, Berkenblit A, Ruiz-Soto R, Birrer MJ. Characterization of folate receptor alpha (FRα) expression in archival tumor and biopsy samples from relapsed epithelial ovarian cancer patients: A phase I expansion study of the FRα-targeting antibody-drug conjugate mirvetuximab soravtansine. Gynecol Oncol 2017; 147:402-407. [PMID: 28843653 PMCID: PMC6893864 DOI: 10.1016/j.ygyno.2017.08.015] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 08/08/2017] [Accepted: 08/12/2017] [Indexed: 11/30/2022]
Abstract
PURPOSE To characterize folate receptor alpha (FRα) expression in archival and fresh biopsy tumor samples from relapsed ovarian cancer patients. METHODS Patients with ovarian tumors amenable to biopsy were eligible to enroll. Eligibility included a minimum requirement of FRα positivity in archival tumor samples (≥25% of cells with ≥2+ staining intensity). Patients received mirvetuximab soravtansine at 6mg/kg once every 3weeks. Core needle biopsies were collected before and after treatment and FRα levels assessed by immunohistochemistry. Descriptive statistics were used to summarize the association between receptor expression and response. RESULTS Twenty-seven heavily pre-treated patients were enrolled. Six individuals (22%) did not have evaluable pre-treatment biopsies due to insufficient tumor cells. The concordance of FRα expression in archival and biopsy tissues was 71%, and no major shifts in receptor expression were seen in matched pre- and post-treatment biopsy samples. Adverse events were generally mild (≤grade 2) with keratopathy (48%), fatigue (44%), diarrhea, and blurred vision (each 37%) being the most common treatment-related toxicities. The confirmed objective response rate (ORR) was 22%, including two complete responses and four partial responses. Superior efficacy measures were observed in the subset of patients with the highest FRα levels (ORR, 31%; progression-free survival, 5.4months). CONCLUSION Concordance of FRα expression in biopsy versus archival tumor samples suggests that archival tissue can reliably identify patients with receptor-positive tumors and is appropriate for patient selection in mirvetuximab soravtansine clinical trials. Regardless of the tissue source analyzed, higher FRα expression was associated with greater antitumor activity.
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Affiliation(s)
| | - Jason A Konner
- Memorial Sloan Kettering Cancer Center, New York, NY, United States.
| | - Kathleen N Moore
- Stephenson Oklahoma Cancer Center at the University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States.
| | - Shelly M Seward
- Wayne State University - Karmanos Cancer Institute, Huntington Woods, MI, United States.
| | | | | | - Ying Su
- ImmunoGen, Inc., Waltham, MA, United States.
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65
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Malik P, Phipps C, Edginton A, Blay J. Pharmacokinetic Considerations for Antibody-Drug Conjugates against Cancer. Pharm Res 2017; 34:2579-2595. [PMID: 28924691 DOI: 10.1007/s11095-017-2259-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 09/09/2017] [Indexed: 12/26/2022]
Abstract
Antibody-drug conjugates (ADCs) are ushering in the next era of targeted therapy against cancer. An ADC for cancer therapy consists of a potent cytotoxic payload that is attached to a tumour-targeted antibody by a chemical linker, usually with an average drug-to-antibody ratio (DAR) of 3.5-4. The theory is to deliver potent cytotoxic payloads directly to tumour cells while sparing healthy cells. However, practical application has proven to be more difficult. At present there are only two ADCs approved for clinical use. Nevertheless, in the last decade there has been an explosion of options for ADC engineering to optimize target selection, Fc receptor interactions, linker, payload and more. Evaluation of these strategies requires an understanding of the mechanistic underpinnings of ADC pharmacokinetics. Development of ADCs for use in cancer further requires an understanding of tumour properties and kinetics within the tumour environment, and how the presence of cancer as a disease will impact distribution and elimination. Key pharmacokinetic considerations for the successful design and clinical application of ADCs in oncology are explored in this review, with a focus on the mechanistic determinants of distribution and elimination.
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Affiliation(s)
- Paul Malik
- School of Pharmacy, University of Waterloo, 10A Victoria St South, Kitchener, Ontario, N2G 1C5, Canada
| | - Colin Phipps
- School of Pharmacy, University of Waterloo, 10A Victoria St South, Kitchener, Ontario, N2G 1C5, Canada.,DMPK & Translational Modeling, Abbvie Inc., North Chicago, Illinois, 60064, USA
| | - Andrea Edginton
- School of Pharmacy, University of Waterloo, 10A Victoria St South, Kitchener, Ontario, N2G 1C5, Canada.
| | - Jonathan Blay
- School of Pharmacy, University of Waterloo, 10A Victoria St South, Kitchener, Ontario, N2G 1C5, Canada
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66
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Wang H, Wang W, Xu Y, Yang Y, Chen X, Quan H, Lou L. Aberrant intracellular metabolism of T-DM1 confers T-DM1 resistance in human epidermal growth factor receptor 2-positive gastric cancer cells. Cancer Sci 2017; 108:1458-1468. [PMID: 28388007 PMCID: PMC5497802 DOI: 10.1111/cas.13253] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 03/29/2017] [Accepted: 04/04/2017] [Indexed: 12/12/2022] Open
Abstract
Trastuzumab emtansine (T-DM1), an antibody-drug conjugate (ADC) consisting of human epidermal growth factor receptor 2 (HER2)-targeted mAb trastuzumab linked to antimicrotubule agent mertansine (DM1), has been approved for the treatment of HER2-positive metastatic breast cancer. Acquired resistance has been a major obstacle to T-DM1 treatment, and mechanisms remain incompletely understood. In the present study, we established a T-DM1-resistant N87-KR cell line from HER2-positive N87 gastric cancer cells to investigate mechanisms of acquired resistance and develop strategies for overcoming it. Although the kinetics of binding, internalization, and externalization of T-DM1 were the same in N87-KR cells and N87 cells, N87-KR was strongly resistant to T-DM1, but remained sensitive to both trastuzumab and DM1. T-DM1 failed to inhibit microtubule polymerization in N87-KR cells. Consistently, lysine-MCC-DM1, the active T-DM1 metabolite that inhibits microtubule polymerization, accumulated much less in N87-KR cells than in N87 cells. Furthermore, lysosome acidification, achieved by vacuolar H+ -ATPase (V-ATPase), was much diminished in N87-KR cells. Notably, treatment of sensitive N87 cells with the V-ATPase selective inhibitor bafilomycin A1 induced T-DM1 resistance, suggesting that aberrant V-ATPase activity decreases T-DM1 metabolism, leading to T-DM1 resistance in N87-KR cells. Interestingly, HER2-targeted ADCs containing a protease-cleavable linker, such as hertuzumab-vc-monomethyl auristatin E, were capable of efficiently overcoming this resistance. Our results show for the first time that a decrease in T-DM1 metabolites induced by aberrant V-ATPase activity contributes to T-DM1 resistance, which could be overcome by HER2-targeted ADCs containing different linkers, including a protease-cleavable linker. Accordingly, we propose that V-ATPase activity in lysosomes is a novel biomarker for predicting T-DM1 resistance.
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MESH Headings
- Ado-Trastuzumab Emtansine
- Animals
- Antibodies, Monoclonal, Humanized/metabolism
- Antibodies, Monoclonal, Humanized/pharmacology
- Antineoplastic Agents/metabolism
- Antineoplastic Agents/pharmacology
- Blotting, Western
- Cell Line, Tumor
- Drug Resistance, Neoplasm/physiology
- Humans
- Immunoconjugates/metabolism
- Immunoconjugates/pharmacology
- Maytansine/analogs & derivatives
- Maytansine/metabolism
- Maytansine/pharmacology
- Mice
- Mice, Nude
- Microscopy, Fluorescence
- Receptor, ErbB-2/biosynthesis
- Stomach Neoplasms/metabolism
- Trastuzumab
- Vacuolar Proton-Translocating ATPases/metabolism
- Xenograft Model Antitumor Assays
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Affiliation(s)
- Hongbin Wang
- Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghaiChina
- University of Chinese Academy of SciencesBeijingChina
| | - Wenqian Wang
- Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghaiChina
| | - Yongping Xu
- Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghaiChina
| | - Yong Yang
- Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghaiChina
| | - Xiaoyan Chen
- Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghaiChina
| | - Haitian Quan
- Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghaiChina
| | - Liguang Lou
- Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghaiChina
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67
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Colby AH, Oberlies NH, Pearce CJ, Herrera VLM, Colson YL, Grinstaff MW. Nanoparticle drug-delivery systems for peritoneal cancers: a case study of the design, characterization and development of the expansile nanoparticle. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2017; 9. [PMID: 28185434 DOI: 10.1002/wnan.1451] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 11/30/2016] [Accepted: 12/17/2016] [Indexed: 12/24/2022]
Abstract
Nanoparticle (NP)-based drug-delivery systems are frequently employed to improve the intravenous administration of chemotherapy; however, few reports explore their application as an intraperitoneal therapy. We developed a pH-responsive expansile nanoparticle (eNP) specifically designed to leverage the intraperitoneal route of administration to treat intraperitoneal malignancies, such as mesothelioma, ovarian, and pancreatic carcinomatoses. This review describes the design, evaluation, and evolution of the eNP technology and, specifically, a Materials-Based Targeting paradigm that is unique among the many active- and passive-targeting strategies currently employed by NP-delivery systems. pH-responsive eNP swelling is responsible for the extended residence at the target tumor site as well as the subsequent improvement in tumoral drug delivery and efficacy observed with paclitaxel-loaded eNPs (PTX-eNPs) compared to the standard clinical formulation of paclitaxel, Taxol®. Superior PTX-eNP efficacy is demonstrated in two different orthotopic models of peritoneal cancer-mesothelioma and ovarian cancer; in a third model-of pancreatic cancer-PTX-eNPs demonstrated comparable efficacy to Taxol with reduced toxicity. Furthermore, the unique structural and responsive characteristics of eNPs enable them to be used in three additional treatment paradigms, including: treatment of lymphatic metastases in breast cancer; use as a highly fluorescent probe to visually guide the resection of peritoneal implants; and, in a two-step delivery paradigm for concentrating separately administered NP and drug at a target site. This case study serves as an important example of using the targeted disease-state's pathophysiology to inform the NP design as well as the method of use of the delivery system. WIREs Nanomed Nanobiotechnol 2017, 9:e1451. doi: 10.1002/wnan.1451 For further resources related to this article, please visit the WIREs website.
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Affiliation(s)
- Aaron H Colby
- Departments of Biomedical Engineering and Chemistry, Boston University, Boston, MA, USA.,Division of Thoracic Surgery, Department of Surgery, Brigham and Women's Hospital, Boston, MA, USA
| | - Nicholas H Oberlies
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, USA
| | | | - Victoria L M Herrera
- Department of Medicine and Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA, USA
| | - Yolonda L Colson
- Division of Thoracic Surgery, Department of Surgery, Brigham and Women's Hospital, Boston, MA, USA
| | - Mark W Grinstaff
- Departments of Biomedical Engineering, Chemistry, and Medicine, Boston University, Boston, MA, USA
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68
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Olziersky AM, Labidi-Galy SI. Clinical Development of Anti-mitotic Drugs in Cancer. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 1002:125-152. [PMID: 28600785 DOI: 10.1007/978-3-319-57127-0_6] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Mitosis is one of the most fundamental processes of life by which a mammalian cell divides into two daughter cells. Mitosis has been an attractive target for anticancer therapies since fast proliferation was identified as one of the hallmarks of cancer cells. Despite efforts into developing specific inhibitors for mitotic kinases and kinesins, very few drugs have shown the efficiency of microtubule targeting-agents in cancer cells with paclitaxel being the most successful. A deeper translational research accompanying clinical trials of anti-mitotic drugs will help in identifying potent biomarkers predictive for response. Here, we review the current knowledge of mitosis targeting agents that have been tested so far in the clinics.
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Affiliation(s)
- Anna-Maria Olziersky
- Department of Cell Physiology and Metabolism, Faculty of Medicine, Geneva University, Geneva, Switzerland
| | - S Intidhar Labidi-Galy
- Department of Oncology, Geneva University Hospitals, Rue Gabrielle Perret-Gentil 4, Geneva, 1205, Switzerland.
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69
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Ku M, Chong G, Hawkes EA. Tumour cell surface antigen targeted therapies in B-cell lymphomas: Beyond rituximab. Blood Rev 2017; 31:23-35. [DOI: 10.1016/j.blre.2016.08.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 06/26/2016] [Accepted: 08/02/2016] [Indexed: 01/16/2023]
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70
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Yang Y, Guo Q, Chen X, Zhang J, Guo H, Qian W, Hou S, Dai J, Li B, Guo Y, Wang H. Preclinical studies of a Pro-antibody-drug conjugate designed to selectively target EGFR-overexpressing tumors with improved therapeutic efficacy. MAbs 2016; 8:405-13. [PMID: 26760045 DOI: 10.1080/19420862.2015.1127491] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
Antibody-drug conjugates (ADCs) have exhibited potent clinical benefits in cancer therapy. However, development of ADCs against epidermal growth factor receptor (EGFR) has limitations because of wide expression of EGFR in both normal and tumor tissues. Previously, we developed an anti-EGFR protease-activated antibody (pro-antibody), termed as PanP, which remains inert against EGFR until activated by tumor-specific protease. Herein, we for the first time report a new class of pro-antibody-drug conjugate (PDC) against EGFR, denoted as PanP-DM1. It has been designed to selectively target the EGFR-overexpressing tumor cells and exert greater anti-tumor activity compared with PanP. Our data showed that PanP-DM1 also could be selectively activated by tumor-specific protease 'uPA'. Furthermore, activated PanP-DM1 was potently cytotoxic against EGFR-overexpressing tumor cell lines in vitro. Crucially, our data indicated that PanP-DM1 was significantly more effective in eradicating EGFR-overexpressing tumors in vivo. Additionally, toxicity was preliminarily evaluated in mice as measured by body weight loss. In summary, our study suggests that PanP-DM1, a novel pro-antibody-drug conjugate, has cancer-selectivity, efficacy and safety profile that supports its potential use for EGFR-overexpressing tumors.
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Affiliation(s)
- Yun Yang
- a International Joint Cancer Institute, Second Military Medical University , Shanghai , China.,b School of Basic Medical Sciences, Xinxiang Medical University , Xinxiang , China.,c State Key Laboratory of Antibody Medicine and Targeted Therapy , Shanghai , China
| | - Qingcheng Guo
- a International Joint Cancer Institute, Second Military Medical University , Shanghai , China.,c State Key Laboratory of Antibody Medicine and Targeted Therapy , Shanghai , China
| | - Xi Chen
- a International Joint Cancer Institute, Second Military Medical University , Shanghai , China.,c State Key Laboratory of Antibody Medicine and Targeted Therapy , Shanghai , China
| | - Junjie Zhang
- c State Key Laboratory of Antibody Medicine and Targeted Therapy , Shanghai , China.,f School of Bioscience and Bioengineering, South China University of Technology , Guangzhou , China
| | - Huaizu Guo
- a International Joint Cancer Institute, Second Military Medical University , Shanghai , China.,c State Key Laboratory of Antibody Medicine and Targeted Therapy , Shanghai , China.,d Zhangjiang Biotechnology Co. Ltd , Shanghai , China
| | - Weizhu Qian
- a International Joint Cancer Institute, Second Military Medical University , Shanghai , China.,c State Key Laboratory of Antibody Medicine and Targeted Therapy , Shanghai , China.,d Zhangjiang Biotechnology Co. Ltd , Shanghai , China
| | - Sheng Hou
- a International Joint Cancer Institute, Second Military Medical University , Shanghai , China.,c State Key Laboratory of Antibody Medicine and Targeted Therapy , Shanghai , China
| | - Jianxin Dai
- a International Joint Cancer Institute, Second Military Medical University , Shanghai , China.,c State Key Laboratory of Antibody Medicine and Targeted Therapy , Shanghai , China
| | - Bohua Li
- a International Joint Cancer Institute, Second Military Medical University , Shanghai , China.,c State Key Laboratory of Antibody Medicine and Targeted Therapy , Shanghai , China
| | - Yajun Guo
- c State Key Laboratory of Antibody Medicine and Targeted Therapy , Shanghai , China.,e School of Pharmacy, Liaocheng University , Liaocheng , China.,f School of Bioscience and Bioengineering, South China University of Technology , Guangzhou , China
| | - Hao Wang
- a International Joint Cancer Institute, Second Military Medical University , Shanghai , China.,c State Key Laboratory of Antibody Medicine and Targeted Therapy , Shanghai , China.,e School of Pharmacy, Liaocheng University , Liaocheng , China
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71
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Mirvetuximab Soravtansine (IMGN853), a Folate Receptor Alpha-Targeting Antibody-Drug Conjugate, Potentiates the Activity of Standard of Care Therapeutics in Ovarian Cancer Models. Neoplasia 2016; 18:775-784. [PMID: 27889646 PMCID: PMC5126132 DOI: 10.1016/j.neo.2016.11.002] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 11/01/2016] [Accepted: 11/01/2016] [Indexed: 11/23/2022] Open
Abstract
Elevated folate receptor alpha (FRα) expression is characteristic of epithelial ovarian cancer (EOC), thus establishing this receptor as a candidate target for the development of novel therapeutics to treat this disease. Mirvetuximab soravtansine (IMGN853) is an antibody-drug conjugate (ADC) that targets FRα for tumor-directed delivery of the maytansinoid DM4, a potent agent that induces mitotic arrest by suppressing microtubule dynamics. Here, combinations of IMGN853 with approved therapeutics were evaluated in preclinical models of EOC. Combinations of IMGN853 with carboplatin or doxorubicin resulted in synergistic antiproliferative effects in the IGROV-1 ovarian cancer cell line in vitro. IMGN853 potentiated the cytotoxic activity of carboplatin via growth arrest and augmented DNA damage; cell cycle perturbations were also observed in cells treated with the IMGN853/doxorubicin combination. These benefits translated into improved antitumor activity in patient-derived xenograft models in vivo in both the platinum-sensitive (IMGN853/carboplatin) and platinum-resistant (IMGN853/pegylated liposomal doxorubicin) settings. IMGN853 co-treatment also improved the in vivo efficacy of bevacizumab in platinum-resistant EOC models, with combination regimens causing significant regressions and complete responses in the majority of tumor-bearing mice. Histological analysis of OV-90 ovarian xenograft tumors revealed that concurrent administration of IMGN853 and bevacizumab caused rapid disruption of tumor microvasculature and extensive necrosis, underscoring the superior bioactivity profile of the combination regimen. Overall, these demonstrations of combinatorial benefit conferred by the addition of the first FRα-targeting ADC to established therapies provide a compelling framework for the potential application of IMGN853 in the treatment of patients with advanced ovarian cancer.
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72
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Junttila MR, Mao W, Wang X, Wang BE, Pham T, Flygare J, Yu SF, Yee S, Goldenberg D, Fields C, Eastham-Anderson J, Singh M, Vij R, Hongo JA, Firestein R, Schutten M, Flagella K, Polakis P, Polson AG. Targeting LGR5+ cells with an antibody-drug conjugate for the treatment of colon cancer. Sci Transl Med 2016; 7:314ra186. [PMID: 26582901 DOI: 10.1126/scitranslmed.aac7433] [Citation(s) in RCA: 118] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Cancer stem cells (CSCs) are hypothesized to actively maintain tumors similarly to how their normal counterparts replenish differentiated cell types within tissues, making them an attractive therapeutic target for the treatment of cancer. Because most CSC markers also label normal tissue stem cells, it is unclear how to selectively target them without compromising normal tissue homeostasis. We evaluated a strategy that targets the cell surface leucine-rich repeat-containing G protein-coupled receptor 5 (LGR5), a well-characterized tissue stem cell and CSC marker, with an antibody conjugated to distinct cytotoxic drugs. One antibody-drug conjugate (ADC) demonstrated potent tumor efficacy and safety in vivo. Furthermore, the ADC decreased tumor size and proliferation, translating to improved survival in a genetically engineered model of intestinal tumorigenesis. These data demonstrate that ADCs can be leveraged to exploit differences between normal and cancer stem cells to successfully target gastrointestinal cancers.
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Affiliation(s)
- Melissa R Junttila
- Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA.
| | - Weiguang Mao
- Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | - Xi Wang
- Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | - Bu-Er Wang
- Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | - Thinh Pham
- Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | - John Flygare
- Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | - Shang-Fan Yu
- Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | - Sharon Yee
- Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | - David Goldenberg
- Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | - Carter Fields
- Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | | | - Mallika Singh
- Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | - Rajesh Vij
- Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | - Jo-Anne Hongo
- Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | - Ron Firestein
- Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | - Melissa Schutten
- Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | - Kelly Flagella
- Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | - Paul Polakis
- Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | - Andrew G Polson
- Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA.
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Antibody-Drug Conjugates for Cancer Therapy. Biomedicines 2016; 4:biomedicines4030014. [PMID: 28536381 PMCID: PMC5344263 DOI: 10.3390/biomedicines4030014] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Revised: 06/24/2016] [Accepted: 06/27/2016] [Indexed: 11/18/2022] Open
Abstract
Antibody–drug conjugates (ADCs) take advantage of the specificity of a monoclonal antibody to deliver a linked cytotoxic agent directly into a tumour cell. The development of these compounds provides exciting opportunities for improvements in patient care. Here, we review the key issues impacting on the clinical success of ADCs in cancer therapy. Like many other developing therapeutic classes, there remain challenges in the design and optimisation of these compounds. As the clinical applications for ADCs continue to expand, key strategies to improve patient outcomes include better patient selection for treatment and the identification of mechanisms of therapy resistance.
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74
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New developments for antibody-drug conjugate-based therapeutic approaches. Curr Opin Immunol 2016; 40:14-23. [DOI: 10.1016/j.coi.2016.02.008] [Citation(s) in RCA: 195] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Revised: 02/23/2016] [Accepted: 02/23/2016] [Indexed: 01/05/2023]
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75
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Bellat V, Lee HH, Vahdat L, Law B. Smart Nanotransformers with Unique Enzyme-Inducible Structural Changes and Drug Release Properties. Biomacromolecules 2016; 17:2040-9. [PMID: 27180972 DOI: 10.1021/acs.biomac.6b00227] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We previously reported a high aspect ratio peptide nanofiber that could be effectively delivered to tumors with minimal nonspecific uptake by other organs. The peptidic nature offers the design flexibility of smart formulation with unique responsiveness. Two new formulations that behave congruously as nanotransformers (NTFs) are reported herein. NTF1 and NTF2 could biomechanically remodel upon enzyme activation to generate a degradable and an aggregable effect, respectively, within the lysosomal compartment. These NTFs were further evaluated as carriers of mertansine (DM1), a microtubule inhibitor. DM1-loaded NTF1 could be degraded by cathepsin B (CathB) to release the same active metabolite, as previously described in the lysosomal degradation of antibody-DM1 conjugate. In contrast, CathB only partially digested DM1-loaded NTF2 and induced aggregate formation to become a storage reservoir with slow payload release property. The DM1-loaded NTF1 exhibited a comparable cytotoxicity to the free drug and was more effective than the NTF2 formulation in eradicating triple negative breast cancer. Our data suggested that biological transformers with distinct enzyme-induced structural changes and payload release profiles could be designed for the intracellular delivery of cytotoxic and imaging agents.
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Affiliation(s)
- Vanessa Bellat
- Molecular Imaging Innovations Institute, Department of Radiology, Weill Cornell Medicine , 413 East 69th Street, New York, New York 10021, United States
| | - Hyun Hee Lee
- Molecular Imaging Innovations Institute, Department of Radiology, Weill Cornell Medicine , 413 East 69th Street, New York, New York 10021, United States
| | - Linda Vahdat
- Department of Medicine, Weill Cornell Medicine , 425 East 61st Street, New York, New York 10065, United States
| | - Benedict Law
- Molecular Imaging Innovations Institute, Department of Radiology, Weill Cornell Medicine , 413 East 69th Street, New York, New York 10021, United States
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76
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Singh AP, Maass KF, Betts AM, Wittrup KD, Kulkarni C, King LE, Khot A, Shah DK. Evolution of Antibody-Drug Conjugate Tumor Disposition Model to Predict Preclinical Tumor Pharmacokinetics of Trastuzumab-Emtansine (T-DM1). AAPS JOURNAL 2016; 18:861-75. [PMID: 27029797 DOI: 10.1208/s12248-016-9904-3] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 03/08/2016] [Indexed: 01/17/2023]
Abstract
A mathematical model capable of accurately characterizing intracellular disposition of ADCs is essential for a priori predicting unconjugated drug concentrations inside the tumor. Towards this goal, the objectives of this manuscript were to: (1) evolve previously published cellular disposition model of ADC with more intracellular details to characterize the disposition of T-DM1 in different HER2 expressing cell lines, (2) integrate the improved cellular model with the ADC tumor disposition model to a priori predict DM1 concentrations in a preclinical tumor model, and (3) identify prominent pathways and sensitive parameters associated with intracellular activation of ADCs. The cellular disposition model was augmented by incorporating intracellular ADC degradation and passive diffusion of unconjugated drug across tumor cells. Different biomeasures and chemomeasures for T-DM1, quantified in the companion manuscript, were incorporated into the modified model of ADC to characterize in vitro pharmacokinetics of T-DM1 in three HER2+ cell lines. When the cellular model was integrated with the tumor disposition model, the model was able to a priori predict tumor DM1 concentrations in xenograft mice. Pathway analysis suggested different contribution of antigen-mediated and passive diffusion pathways for intracellular unconjugated drug exposure between in vitro and in vivo systems. Global and local sensitivity analyses revealed that non-specific deconjugation and passive diffusion of the drug across tumor cell membrane are key parameters for drug exposure inside a cell. Finally, a systems pharmacokinetic model for intracellular processing of ADCs has been proposed to highlight our current understanding about the determinants of ADC activation inside a cell.
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Affiliation(s)
- Aman P Singh
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, The State University of New York at Buffalo, 455 Kapoor Hall, Buffalo, New York, 14214-8033, USA
| | - Katie F Maass
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.,David H. Koch Institute of Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Alison M Betts
- Translational Research Group, Department of Pharmacokinetics Dynamics and Metabolism, Pfizer, Groton, Connecticut, USA
| | - K Dane Wittrup
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.,David H. Koch Institute of Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.,Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Chethana Kulkarni
- Oncology Medicinal Chemistry, Worldwide Medicinal Chemistry, Pfizer, Groton, Connecticut, USA
| | - Lindsay E King
- Translational Research Group, Department of Pharmacokinetics Dynamics and Metabolism, Pfizer, Groton, Connecticut, USA
| | - Antari Khot
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, The State University of New York at Buffalo, 455 Kapoor Hall, Buffalo, New York, 14214-8033, USA
| | - Dhaval K Shah
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, The State University of New York at Buffalo, 455 Kapoor Hall, Buffalo, New York, 14214-8033, USA.
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Singh R, Setiady YY, Ponte J, Kovtun YV, Lai KC, Hong EE, Fishkin N, Dong L, Jones GE, Coccia JA, Lanieri L, Veale K, Costoplus JA, Skaletskaya A, Gabriel R, Salomon P, Wu R, Qiu Q, Erickson HK, Lambert JM, Chari RVJ, Widdison WC. A New Triglycyl Peptide Linker for Antibody-Drug Conjugates (ADCs) with Improved Targeted Killing of Cancer Cells. Mol Cancer Ther 2016; 15:1311-20. [PMID: 27197308 DOI: 10.1158/1535-7163.mct-16-0021] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Accepted: 03/19/2016] [Indexed: 11/16/2022]
Abstract
A triglycyl peptide linker (CX) was designed for use in antibody -: drug conjugates (ADC), aiming to provide efficient release and lysosomal efflux of cytotoxic catabolites within targeted cancer cells. ADCs comprising anti-epithelial cell adhesion molecule (anti-EpCAM) and anti-EGFR antibodies with maytansinoid payloads were prepared using CX or a noncleavable SMCC linker (CX and SMCC ADCs). The in vitro cytotoxic activities of CX and SMCC ADCs were similar for several cancer cell lines; however, the CX ADC was more active (5-100-fold lower IC50) than the SMCC ADC in other cell lines, including a multidrug-resistant line. Both CX and SMCC ADCs showed comparable MTDs and pharmacokinetics in CD-1 mice. In Calu-3 tumor xenografts, antitumor efficacy was observed with the anti-EpCAM CX ADC at a 5-fold lower dose than the corresponding SMCC ADC in vivo Similarly, the anti-EGFR CX ADC showed improved antitumor activity over the respective SMCC conjugate in HSC-2 and H1975 tumor models; however, both exhibited similar activity against FaDu xenografts. Mechanistically, in contrast with the charged lysine-linked catabolite of SMCC ADC, a significant fraction of the carboxylic acid catabolite of CX ADC could be uncharged in the acidic lysosomes, and thus diffuse out readily into the cytosol. Upon release from tumor cells, CX catabolites are charged at extracellular pH and do not penetrate and kill neighboring cells, similar to the SMCC catabolite. Overall, these data suggest that CX represents a promising linker option for the development of ADCs with improved therapeutic properties. Mol Cancer Ther; 15(6); 1311-20. ©2016 AACR.
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Affiliation(s)
| | | | | | | | | | | | | | - Ling Dong
- ImmunoGen, Inc., Waltham, Massachusetts
| | | | | | | | | | | | | | | | | | - Rui Wu
- ImmunoGen, Inc., Waltham, Massachusetts
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78
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Abstract
PURPOSE OF REVIEW Recent advances in nanotechnology have addressed some of the issues related to lack of selectivity and nonspecific toxicities associated with conventional chemotherapy. Nanoparticles are therapeutic carriers that can be fine tuned for specific application and for passive or active tumor targeting. RECENT FINDINGS Although the nanoparticle field is rapidly expanding, there are to date only six nanoparticle-based drug delivery platforms and two antibody-drug conjugates that are clinically approved for cancer therapy. Here, we review the clinical data of liposomal anthracyclines, nanoparticle formulations of paclitaxel and trastuzumab emtansine. We then briefly comment on efficacy and safety issues of nanoparticles, as well as on the next-generation nanoparticles for cancer therapy. SUMMARY The emerging development of cancer nanotechnology offers the opportunity of reinvestigating the potential of cytotoxic agents, improving tumor targeting and drug delivery, leading to better safety profile and antitumor activity. Adding specificity to nanoparticles may allow personalization of cancer therapy using chemotherapy.
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Van den Mooter T, Teuwen LA, Rutten A, Dirix L. Trastuzumab emtansine in advanced human epidermal growth factor receptor 2-positive breast cancer. Expert Opin Biol Ther 2015; 15:749-60. [PMID: 25865453 DOI: 10.1517/14712598.2015.1036026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
INTRODUCTION Ado- trastuzumab emtansine (T-DM1) is a human epidermal growth factor receptor 2 (HER2)-targeted antibody-drug conjugate composed of trastuzumab, a stable linker (MCC), and the cytotoxic agent DM1 (derivative of maytansine; mertansine). T-DM1 retains the mechanisms of action of trastuzumab, but also acts as a, selectively delivered, tubulin inhibitor. Following antigen-mediated binding to the tumor cell, T-DM1 is endocytosed and intracellularly catabolized resulting in the release of its cytotoxic moiety. AREAS COVERED T-DM1 has completed Phase III development and compared favorably with the lapatinib/capecitabine combination with a superior response rate (objective response rate [ORR]) and duration of response, longer duration of disease control (progression-free survival [PFS]), prolonged overall survival and improved tolerability and quality of life in patients with prior treatment with trastuzumab and a taxane. In a separate Phase III, T-DM1 was compared with any other chosen regimen in patients who had at least received two prior HER2-directed therapies. T-DM1 nearly doubled PFS. EXPERT OPINION T-DM1 (Kadcyla) has become the treatment of choice in second-line and beyond for patients with advanced HER2-expressing breast cancer.
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Affiliation(s)
- Tom Van den Mooter
- Sint-Augustinus Cancer Center, Department of Medical Oncology , Sint-Augustinus, Oosterveldlaan 24, 2610 Wilrijk-Antwerp , Belgium +003234433737 ;
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80
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Kim EG, Kim KM. Strategies and Advancement in Antibody-Drug Conjugate Optimization for Targeted Cancer Therapeutics. Biomol Ther (Seoul) 2015; 23:493-509. [PMID: 26535074 PMCID: PMC4624065 DOI: 10.4062/biomolther.2015.116] [Citation(s) in RCA: 110] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 09/16/2015] [Accepted: 09/23/2015] [Indexed: 11/05/2022] Open
Abstract
Antibody-drug conjugates utilize the antibody as a delivery vehicle for highly potent cytotoxic molecules with specificity for tumor-associated antigens for cancer therapy. Critical parameters that govern successful antibody-drug conjugate development for clinical use include the selection of the tumor target antigen, the antibody against the target, the cytotoxic molecule, the linker bridging the cytotoxic molecule and the antibody, and the conjugation chemistry used for the attachment of the cytotoxic molecule to the antibody. Advancements in these core antibody-drug conjugate technology are reflected by recent approval of Adectris(®) (anti-CD30-drug conjugate) and Kadcyla(®) (anti-HER2 drug conjugate). The potential approval of an anti-CD22 conjugate and promising new clinical data for anti-CD19 and anti-CD33 conjugates are additional advancements. Enrichment of antibody-drug conjugates with newly developed potent cytotoxic molecules and linkers are also in the pipeline for various tumor targets. However, the complexity of antibody-drug conjugate components, conjugation methods, and off-target toxicities still pose challenges for the strategic design of antibody-drug conjugates to achieve their fullest therapeutic potential. This review will discuss the emergence of clinical antibody-drug conjugates, current trends in optimization strategies, and recent study results for antibody-drug conjugates that have incorporated the latest optimization strategies. Future challenges and perspectives toward making antibody-drug conjugates more amendable for broader disease indications are also discussed.
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Affiliation(s)
- Eunhee G. Kim
- Department of Systems Immunology, College of Biomedical Science, Kangwon National University, Chuncheon 24341,
Republic of Korea
| | - Kristine M. Kim
- Department of Systems Immunology, College of Biomedical Science, Kangwon National University, Chuncheon 24341,
Republic of Korea
- Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 24341,
Republic of Korea
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81
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Mechanism of action of ixabepilone and its interactions with the βIII-tubulin isotype. Cancer Chemother Pharmacol 2015; 76:1013-24. [PMID: 26416565 DOI: 10.1007/s00280-015-2863-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Accepted: 09/01/2015] [Indexed: 10/23/2022]
Abstract
Ixabepilone (Ixempra, BMS-247550), a semisynthetic analog of epothilone B, is a microtubule-targeted drug in clinical use for treatment of metastatic or locally advanced breast cancer. Ixabepilone's binding and mechanism of action on microtubules and their dynamics, as well as its interactions with isotypically altered microtubules, both in vitro and in tumor cells, have not been described. Microtubules are dynamic polymers of the protein tubulin that function in mitosis, intracellular transport, cell proliferation, and migration. They continually undergo dynamic instability, periods of slow growth and rapid shortening that are crucial to these cell functions. We determined ixabepilone's microtubule binding and polymerization effects in vitro and also determined its effects on inhibition of dynamic instability in vitro and in cells, both with and without removal of the βIII isotype of tubulin. The βIII isotype of tubulin is associated with drug resistance and tumor aggressivity. We found that removal (in vitro) and knockdown (in cells) of βIII-tubulin led to increased inhibition of microtubule dynamic instability by ixabepilone. Depletion of βIII-tubulin from MCF7 human breast cancer cells also induced increased mitotic arrest by ixabepilone. Thus, βIII-tubulin expression suppresses the antitumor effects of ixabepilone, indicating that increased βIII-tubulin may be an important contributor to the development of resistance to ixabepilone.
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Abstract
INTRODUCTION Trastuzumab emtansine (T-DM1) is a human epidermal growth factor receptor 2 (HER2)-targeted antibody-drug conjugate (ADC) composed of trastuzumab, a stable linker (MCC), and the cytotoxic agent DM1 (derivative of maytansine). Administration of T-DM1 leads to limited systemic exposure of free DM1, with no evidence of DM1 accumulation after repeated dosing. AREAS COVERED Phase I and Phase II clinical trials with T-DM1 as a single agent and in combination with paclitaxel, docetaxel, and pertuzumab have shown substantial clinical activity and a favorable safety profile. A randomized, open-label, first-line trial comparing trastuzumab and docetaxel with single agent T-DM1 showed a significant improved progression-free survival for T-DM1. EXPERT OPINION T-DM1 has successfully completed second-line Phase III development for advanced HER2-positive breast cancer. The Phase III EMILIA study demonstrated an overall survival benefit for T-DM1 compared to the combination of lapatinib and capecitabine in taxane-trastuzumab pretreated patients. T-DM1 may offer delivery on a personalized basis of very potent cytotoxic agents in a cellular selective manner.
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Affiliation(s)
- Luc Y Dirix
- St Augustinus Hospital, Translational Cancer Research Group Antwerp, Oosterveldlaan 24, Wilrijk-Antwerp, 2610, Belgium
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83
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Dhillon S. Trastuzumab emtansine: a review of its use in patients with HER2-positive advanced breast cancer previously treated with trastuzumab-based therapy. Drugs 2015; 74:675-86. [PMID: 24659374 DOI: 10.1007/s40265-014-0201-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Trastuzumab emtansine (Kadcyla™) is an antibody-drug conjugate consisting of the humanized anti-human epidermal growth factor receptor (HER) 2 antibody trastuzumab covalently linked to the highly potent microtubule inhibitory drug DM1 (a cytotoxic derivative of maytansine) via a stable thioether linker. Intravenous trastuzumab emtansine was recently approved for use in patients with HER2-positive, unresectable, locally advanced (in the EU) or metastatic (in the USA and EU) breast cancer who had previously received trastuzumab and a taxane (separately or in combination), making it the first antibody-drug conjugate approved in this indication. This article reviews the efficacy and tolerability of trastuzumab emtansine in these patients and summarizes its pharmacology. In the well-designed EMILIA study, trastuzumab emtansine significantly prolonged progression-free survival and overall survival, relative to treatment with lapatinib plus capecitabine, in patients with HER2-positive, unresectable, locally advanced or metastatic breast cancer who were previously treated with trastuzumab and a taxane. Trastuzumab emtansine was generally well tolerated in this study, with <6% of patients discontinuing treatment because of adverse events. Based on its efficacy and favourable tolerability, the US National Comprehensive Cancer Network guidelines recommend trastuzumab emtansine as the preferred option in patients with HER2-positive metastatic breast cancer who have received previous trastuzumab-based therapy.
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Affiliation(s)
- Sohita Dhillon
- Adis, 41 Centorian Drive, Private Bag 65901, Mairangi Bay, North Shore, 0754, Auckland, New Zealand,
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84
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Peters C, Brown S. Antibody-drug conjugates as novel anti-cancer chemotherapeutics. Biosci Rep 2015; 35:e00225. [PMID: 26182432 PMCID: PMC4613712 DOI: 10.1042/bsr20150089] [Citation(s) in RCA: 287] [Impact Index Per Article: 31.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Revised: 05/18/2015] [Accepted: 05/29/2015] [Indexed: 12/19/2022] Open
Abstract
Over the past couple of decades, antibody-drug conjugates (ADCs) have revolutionized the field of cancer chemotherapy. Unlike conventional treatments that damage healthy tissues upon dose escalation, ADCs utilize monoclonal antibodies (mAbs) to specifically bind tumour-associated target antigens and deliver a highly potent cytotoxic agent. The synergistic combination of mAbs conjugated to small-molecule chemotherapeutics, via a stable linker, has given rise to an extremely efficacious class of anti-cancer drugs with an already large and rapidly growing clinical pipeline. The primary objective of this paper is to review current knowledge and latest developments in the field of ADCs. Upon intravenous administration, ADCs bind to their target antigens and are internalized through receptor-mediated endocytosis. This facilitates the subsequent release of the cytotoxin, which eventually leads to apoptotic cell death of the cancer cell. The three components of ADCs (mAb, linker and cytotoxin) affect the efficacy and toxicity of the conjugate. Optimizing each one, while enhancing the functionality of the ADC as a whole, has been one of the major considerations of ADC design and development. In addition to these, the choice of clinically relevant targets and the position and number of linkages have also been the key determinants of ADC efficacy. The only marketed ADCs, brentuximab vedotin and trastuzumab emtansine (T-DM1), have demonstrated their use against both haematological and solid malignancies respectively. The success of future ADCs relies on improving target selection, increasing cytotoxin potency, developing innovative linkers and overcoming drug resistance. As more research is conducted to tackle these issues, ADCs are likely to become part of the future of targeted cancer therapeutics.
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Affiliation(s)
- Christina Peters
- School of Life Sciences, Nottingham Medical School, Queen's Medical Centre, Nottingham NG7 2UH, U.K
| | - Stuart Brown
- School of Life Sciences, Nottingham Medical School, Queen's Medical Centre, Nottingham NG7 2UH, U.K.
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85
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Ab O, Whiteman KR, Bartle LM, Sun X, Singh R, Tavares D, LaBelle A, Payne G, Lutz RJ, Pinkas J, Goldmacher VS, Chittenden T, Lambert JM. IMGN853, a Folate Receptor-α (FRα)-Targeting Antibody-Drug Conjugate, Exhibits Potent Targeted Antitumor Activity against FRα-Expressing Tumors. Mol Cancer Ther 2015; 14:1605-13. [PMID: 25904506 DOI: 10.1158/1535-7163.mct-14-1095] [Citation(s) in RCA: 124] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2014] [Accepted: 04/10/2015] [Indexed: 11/16/2022]
Abstract
A majority of ovarian and non-small cell lung adenocarcinoma cancers overexpress folate receptor α (FRα). Here, we report the development of an anti-FRα antibody-drug conjugate (ADC), consisting of a FRα-binding antibody attached to a highly potent maytansinoid that induces cell-cycle arrest and cell death by targeting microtubules. From screening a large panel of anti-FRα monoclonal antibodies, we selected the humanized antibody M9346A as the best antibody for targeted delivery of a maytansinoid payload into FRα-positive cells. We compared M9346A conjugates with various linker/maytansinoid combinations, and found that a conjugate, now denoted as IMGN853, with the N-succinimidyl 4-(2-pyridyldithio)-2-sulfobutanoate (sulfo-SPDB) linker and N(2')-deacetyl-N(2')-(4-mercapto-4-methyl-1-oxopentyl)-maytansine (DM4) exhibited the most potent antitumor activity in several FRα-expressing xenograft tumor models. The level of expression of FRα on the surface of cells was a major determinant in the sensitivity of tumor cells to the cytotoxic effect of the conjugate. Efficacy studies of IMGN853 in xenografts of ovarian cancer and non-small cell lung cancer cell lines and of a patient tumor-derived xenograft model demonstrated that the ADC was highly active against tumors that expressed FRα at levels similar to those found on a large fraction of ovarian and non-small cell lung cancer patient tumors, as assessed by immunohistochemistry. IMGN853 displayed cytotoxic activity against FRα-negative cells situated near FRα-positive cells (bystander cytotoxic activity), indicating its ability to eradicate tumors with heterogeneous expression of FRα. Together, these findings support the clinical development of IMGN853 as a novel targeted therapy for patients with FRα-expressing tumors.
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Affiliation(s)
- Olga Ab
- Department of Cell Biology, ImmunoGen, Inc., Waltham, Massachusetts.
| | - Kathleen R Whiteman
- Department of Pharmacology Toxicology, ImmunoGen, Inc., Waltham, Massachusetts
| | - Laura M Bartle
- Department of Cell Biology, ImmunoGen, Inc., Waltham, Massachusetts
| | - Xiuxia Sun
- Department of Biochemistry, ImmunoGen, Inc., Waltham, Massachusetts
| | - Rajeeva Singh
- Department of Biochemistry, ImmunoGen, Inc., Waltham, Massachusetts
| | - Daniel Tavares
- Department of Antibody Engineering, ImmunoGen, Inc., Waltham, Massachusetts
| | - Alyssa LaBelle
- Department of Biomarkers, ImmunoGen, Inc., Waltham, Massachusetts
| | - Gillian Payne
- Department of Bioanalytical Science, ImmunoGen, Inc., Waltham, Massachusetts
| | - Robert J Lutz
- Department of Translational Research and Development, ImmunoGen, Inc., Waltham, Massachusetts
| | - Jan Pinkas
- Department of Pharmacology Toxicology, ImmunoGen, Inc., Waltham, Massachusetts
| | | | | | - John M Lambert
- Research and Development, ImmunoGen, Inc., Waltham, Massachusetts
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86
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Salomon PL, Singh R. Sensitive ELISA Method for the Measurement of Catabolites of Antibody–Drug Conjugates (ADCs) in Target Cancer Cells. Mol Pharm 2015; 12:1752-61. [DOI: 10.1021/acs.molpharmaceut.5b00028] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Paulin L. Salomon
- ImmunoGen, Inc., 830 Winter Street, Waltham, Massachusetts 02451, United States
| | - Rajeeva Singh
- ImmunoGen, Inc., 830 Winter Street, Waltham, Massachusetts 02451, United States
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87
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Goldmacher VS, Audette CA, Guan Y, Sidhom EH, Shah JV, Whiteman KR, Kovtun YV. High-affinity accumulation of a maytansinoid in cells via weak tubulin interaction. PLoS One 2015; 10:e0117523. [PMID: 25671541 PMCID: PMC4324968 DOI: 10.1371/journal.pone.0117523] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 12/27/2014] [Indexed: 11/18/2022] Open
Abstract
The microtubule-targeting maytansinoids accumulate in cells and induce mitotic arrest at 250- to 1000-fold lower concentrations than those required for their association with tubulin or microtubules. To identify the mechanisms of this intracellular accumulation and exceptional cytotoxicity of maytansinoids we studied interaction of a highly cytotoxic maytansinoid, S-methyl DM1 and several other maytansinoids with cells. S-methyl DM1 accumulated inside the cells with a markedly higher apparent affinity than to tubulin or microtubules. The apparent affinities of maytansinoids correlated with their cytotoxicities. The number of intracellular binding sites for S-methyl DM1 in MCF7 cells was comparable to the number of tubulin molecules per cell (~ 4-6 × 10(7) copies). Efflux of 3[H]-S-methyl DM1 from cells was enhanced in the presence of an excess of non-labeled S-methyl DM1, indicating that re-binding of 3 [H]-S-methyl DM1 to intracellular binding sites contributed to its intracellular retention. Liposomes loaded with non-polymerized tubulin recapitulated the apparent high-affinity association of S-methyl DM1 to cells. We propose a model for the intracellular accumulation of maytansinoids in which molecules of the compounds diffuse into a cell and associate with tubulin. Affinities of maytansinoids for individual tubulin molecules are weak, but the high intracellular concentration of tubulin favors, after dissociation of a compound-tubulin complex, their re-binding to a tubulin molecule, or to a tip of a microtubule in the same cell, over their efflux. As a result, a significant fraction of microtubule tips is occupied with a maytansinoid when added to cells at sub-nanomolar concentrations, inducing mitotic arrest and cell death.
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Affiliation(s)
- Victor S. Goldmacher
- Department of Cell Biology, ImmunoGen, Inc., Waltham, Massachusetts, United States of America
- * E-mail:
| | - Charlene A. Audette
- Department of Cell Biology, ImmunoGen, Inc., Waltham, Massachusetts, United States of America
| | - Yinghua Guan
- Department of Systems Biology, Harvard Medical School, Boston, Massachusetts, United States of America
- Renal Division, Brigham and Women’s Hospital, Boston, Massachusetts, United States of America
| | - Eriene-Heidi Sidhom
- Department of Systems Biology, Harvard Medical School, Boston, Massachusetts, United States of America
- Renal Division, Brigham and Women’s Hospital, Boston, Massachusetts, United States of America
| | - Jagesh V. Shah
- Department of Systems Biology, Harvard Medical School, Boston, Massachusetts, United States of America
- Renal Division, Brigham and Women’s Hospital, Boston, Massachusetts, United States of America
| | - Kathleen R. Whiteman
- Department of Cell Biology, ImmunoGen, Inc., Waltham, Massachusetts, United States of America
| | - Yelena V. Kovtun
- Department of Cell Biology, ImmunoGen, Inc., Waltham, Massachusetts, United States of America
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88
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Lopus M, Naik PK. Taking aim at a dynamic target: Noscapinoids as microtubule-targeted cancer therapeutics. Pharmacol Rep 2015; 67:56-62. [DOI: 10.1016/j.pharep.2014.09.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2014] [Revised: 09/06/2014] [Accepted: 09/08/2014] [Indexed: 10/24/2022]
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Lai KC, Deckert J, Setiady YY, Shah P, Wang L, Chari R, Lambert JM. Evaluation of Targets for Maytansinoid ADC Therapy Using a Novel Radiochemical Assay. Pharm Res 2015; 32:3593-603. [PMID: 25630819 DOI: 10.1007/s11095-015-1633-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Accepted: 01/16/2015] [Indexed: 10/24/2022]
Abstract
PURPOSE Many antibody-drug conjugates (ADCs) become active only after antigen-mediated internalization and release of the cytotoxic agent via antibody degradation. Quantifying these processes can provide critical information on the suitability of a particular receptor target or antibody for ADC therapy by providing insight into the amount of cytotoxic agent released. We describe a simple and inexpensive radiolabel assay to monitor this process in cultured cancer cells. METHODS Monoclonal antibodies were trace-labeled at their lysine residues by treatment with the N-hydroxysuccinimide ester of [(3)H]propionic acid. Human cancer cell cultures were treated with the labeled antibody at concentrations sufficient to saturate the targeted antigen. After washing to remove unbound antibody, cells were incubated and analyzed for antigen expression, conjugate degradation and catabolite formation. Results were compared with data obtained from similar assays run with radiolabeled antibody-[(3)H]maytansinoid conjugates ([(3)H]AMCs). To exemplify the method, studies were conducted with a panel of [(3)H]propionamide-antibodies to evaluate processing efficiency in EGFR-expressing SCCHN cell lines, and in NHL cell lines expressing the B-cell targets CD19, CD20, CD22 and CD37. RESULTS Use of the [(3)H]propionamide-antibody assay yielded cell-mediated processing results similar to those obtained with corresponding maytansinoid ADCs. Further exploration allowed comparison of expression levels, antigen-dependent degradation, and catabolite formation across a panel of EGFR-expressing SCCHN cell lines, and for multiple targets in various B-cell cancer indications. CONCLUSIONS The [(3)H]propionamide-antibody assay described here is a sensitive, facile method which enables rapid and robust assessment of relative antibody processing amounts for target, antibody, and cell line evaluation.
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Affiliation(s)
| | | | | | - Prerak Shah
- ImmunoGen, Inc., Waltham, Massachusetts, USA
| | - Lintao Wang
- ImmunoGen, Inc., Waltham, Massachusetts, USA
| | - Ravi Chari
- ImmunoGen, Inc., Waltham, Massachusetts, USA
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90
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Microtubule-targeting agents augment the toxicity of DNA-damaging agents by disrupting intracellular trafficking of DNA repair proteins. Proc Natl Acad Sci U S A 2015; 112:1571-6. [PMID: 25605897 DOI: 10.1073/pnas.1416418112] [Citation(s) in RCA: 133] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The paradigm that microtubule-targeting agents (MTAs) cause cell death via mitotic arrest applies to rapidly dividing cells but cannot explain MTA activity in slowly growing human cancers. Many preferred cancer regimens combine a MTA with a DNA-damaging agent (DDA). We hypothesized that MTAs synergize with DDAs by interfering with trafficking of DNA repair proteins on interphase microtubules. We investigated nine proteins involved in DNA repair: ATM, ATR, DNA-PK, Rad50, Mre11, p95/NBS1, p53, 53BP1, and p63. The proteins were sequestered in the cytoplasm by vincristine and paclitaxel but not by an aurora kinase inhibitor, colocalized with tubulin by confocal microscopy and coimmunoprecipitated with the microtubule motor dynein. Furthermore, adding MTAs to radiation, doxorubicin, or etoposide led to more sustained γ-H2AX levels. We conclude DNA damage-repair proteins traffic on microtubules and addition of MTAs sequesters them in the cytoplasm, explaining why MTA/DDA combinations are common anticancer regimens.
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91
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Using the Lessons Learned From the Clinic to Improve the Preclinical Development of Antibody Drug Conjugates. Pharm Res 2014; 32:3458-69. [PMID: 25339341 PMCID: PMC4596896 DOI: 10.1007/s11095-014-1536-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Accepted: 09/29/2014] [Indexed: 12/22/2022]
Abstract
The treatment options for cancer patients include surgery, chemotherapeutics, radiation therapy, antibody therapy and various combinations of these therapies. The challenge with each therapy is finding the balance between maximizing the anti-tumor efficacy while minimizing the dose limiting toxicities. Antibodies, unlike small molecule chemotherapeutics, selectively bind to cell surface tumor antigens and can be used to deliver radionucleotides or small molecule chemotherapeutic drugs directly to the tumor. Advances in antibody engineering, linker chemistry and the identification of potent cytotoxic drugs led to the recent approval of two antibody drug conjugates to treat breast cancer and lymphoma patients. We will discuss how the observations from the clinical development of antibody drug conjugates can guide the preclinical development of the next generation of antibody drug conjugates.
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Abstract
Antibody-drug conjugates (ADCs) represent a promising therapeutic modality for the clinical management of cancer. The recent approvals of brentuximab vedotin and ado-trastuzumab emtansine plus emerging data for many molecules in clinical trials highlight the potential for ADCs to offer new therapeutic options for patients. Currently, more than 30 ADCs are being evaluated in early- or late-stage clinical trials. Accordingly, much has been done to refine and transform the early-generation ADCs to the highly effective products that we now have in clinical development. These changes include a better understanding of optimal target selection, advances in antibody engineering, improvements in linker/payload conjugation strategies, and the generation of highly potent ADC payloads. In this review, we detail the current status of ADCs in both preclinical and clinical development, highlight technological advancements in ADC development, and speculate towards the future of this targeted therapeutic platform.
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Affiliation(s)
- Fiona Mack
- Oncology Research Unit, World Wide Research and Development, Pfizer Inc, Pearl River, NY
| | - Michael Ritchie
- Oncology Research Unit, World Wide Research and Development, Pfizer Inc, Pearl River, NY
| | - Puja Sapra
- Oncology Research Unit, World Wide Research and Development, Pfizer Inc, Pearl River, NY.
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93
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Azarenko O, Smiyun G, Mah J, Wilson L, Jordan MA. Antiproliferative mechanism of action of the novel taxane cabazitaxel as compared with the parent compound docetaxel in MCF7 breast cancer cells. Mol Cancer Ther 2014; 13:2092-103. [PMID: 24980947 DOI: 10.1158/1535-7163.mct-14-0265] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Cabazitaxel, a novel chemotherapeutic taxane, is effective against docetaxel-resistant cells and tumors. It is approved for treatment of metastatic hormone-refractory prostate cancer in patients pretreated with docetaxel. Objective responses have been observed in many other cancers, including pretreated metastatic breast cancer. Cabazitaxel and docetaxel share a high degree of structural similarity. The basis for cabazitaxel's efficacy is unclear, and its mechanism has not been described. We compared the effects of cabazitaxel and docetaxel on MCF7 human breast cancer cells expressing fluorescent tubulin. Both drugs inhibited cell proliferation (IC50s, cabazitaxel, 0.4 ± 0.1 nmol/L, docetaxel, 2.5 ± 0.5 nmol/L) and arrested cells in metaphase by inducing mitotic spindle abnormalities. Drug concentrations required for half-maximal mitotic arrest at 24 hours were similar (1.9 nmol/L cabazitaxel and 2.2 nmol/L docetaxel). Cabazitaxel suppressed microtubule dynamic instability significantly more potently than docetaxel. In particular, cabazitaxel (2 nmol/L) suppressed the microtubule shortening rate by 59% (compared with 49% for 2 nmol/L docetaxel), the growing rate by 33% (vs. 19%), and overall dynamicity by 83% (vs. 64%). Cabazitaxel was taken up into cells significantly faster than docetaxel, attaining an intracellular concentration of 25 μmol/L within 1 hour, compared with 10 hours for docetaxel. Importantly, after washing, the intracellular cabazitaxel concentration remained high, whereas the docetaxel concentration was significantly reduced. The data indicate that the potency of cabazitaxel in docetaxel-resistant tumors is due to stronger suppression of microtubule dynamics, faster drug uptake, and better intracellular retention than occurs with docetaxel.
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Affiliation(s)
- Olga Azarenko
- Department of Molecular, Cellular, and Developmental Biology and the Neuroscience Research Institute, University of California Santa Barbara, Santa Barbara, California
| | - Gregoriy Smiyun
- Department of Molecular, Cellular, and Developmental Biology and the Neuroscience Research Institute, University of California Santa Barbara, Santa Barbara, California
| | - Jeffrey Mah
- Department of Molecular, Cellular, and Developmental Biology and the Neuroscience Research Institute, University of California Santa Barbara, Santa Barbara, California
| | - Leslie Wilson
- Department of Molecular, Cellular, and Developmental Biology and the Neuroscience Research Institute, University of California Santa Barbara, Santa Barbara, California
| | - Mary Ann Jordan
- Department of Molecular, Cellular, and Developmental Biology and the Neuroscience Research Institute, University of California Santa Barbara, Santa Barbara, California
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94
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Azarenko O, Jordan MA, Wilson L. Erucin, the major isothiocyanate in arugula (Eruca sativa), inhibits proliferation of MCF7 tumor cells by suppressing microtubule dynamics. PLoS One 2014; 9:e100599. [PMID: 24950293 PMCID: PMC4065051 DOI: 10.1371/journal.pone.0100599] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Accepted: 05/28/2014] [Indexed: 01/25/2023] Open
Abstract
Consumption of cruciferous vegetables is associated with reduced risk of various types of cancer. Isothiocyanates including sulforaphane and erucin are believed to be responsible for this activity. Erucin [1-isothiocyanato-4-(methylthio)butane], which is metabolically and structurally related to sulforaphane, is present in large quantities in arugula (Eruca sativa, Mill.), kohlrabi and Chinese cabbage. However, its cancer preventive mechanisms remain poorly understood. We found that erucin inhibits proliferation of MCF7 breast cancer cells (IC50 = 28 µM) in parallel with cell cycle arrest at mitosis (IC50 = 13 µM) and apoptosis, by a mechanism consistent with impairment of microtubule dynamics. Concentrations of 5-15 µM erucin suppressed the dynamic instability of microtubules during interphase in the cells. Most dynamic instability parameters were inhibited, including the rates and extents of growing and shortening, the switching frequencies between growing and shortening, and the overall dynamicity. Much higher erucin concentrations were required to reduce the microtubule polymer mass. In addition, erucin suppressed dynamic instability of microtubules reassembled from purified tubulin in similar fashion. The effects of erucin on microtubule dynamics, like those of sulforaphane, are similar qualitatively to those of much more powerful clinically-used microtubule-targeting anticancer drugs, including taxanes and the vinca alkaloids. The results suggest that suppression of microtubule dynamics by erucin and the resulting impairment of critically important microtubule-dependent cell functions such as mitosis, cell migration and microtubule-based transport may be important in its cancer preventive activities.
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Affiliation(s)
- Olga Azarenko
- Department of Molecular, Cellular, and Developmental Biology, and the Neuroscience Research Institute, University of California Santa Barbara, Santa Barbara, California, United States of America
| | - Mary Ann Jordan
- Department of Molecular, Cellular, and Developmental Biology, and the Neuroscience Research Institute, University of California Santa Barbara, Santa Barbara, California, United States of America
| | - Leslie Wilson
- Department of Molecular, Cellular, and Developmental Biology, and the Neuroscience Research Institute, University of California Santa Barbara, Santa Barbara, California, United States of America
- * E-mail:
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95
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Cretella D, Saccani F, Quaini F, Frati C, Lagrasta C, Bonelli M, Caffarra C, Cavazzoni A, Fumarola C, Galetti M, La Monica S, Ampollini L, Tiseo M, Ardizzoni A, Petronini PG, Alfieri RR. Trastuzumab emtansine is active on HER-2 overexpressing NSCLC cell lines and overcomes gefitinib resistance. Mol Cancer 2014; 13:143. [PMID: 24898067 PMCID: PMC4058446 DOI: 10.1186/1476-4598-13-143] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 05/30/2014] [Indexed: 12/19/2022] Open
Abstract
Background HER-2 represents a relatively new therapeutic target for non small cell lung cancer (NSCLC) patients. The incidence for reported HER-2 overexpression/amplification/mutations ranges from 2 to 20% in NSCLC. Moreover, HER-2 amplification is a potential mechanism of resistance to tyrosine kinase inhibitors of the epidermal growth factor receptor (EGFR-TKI) (about 10% of cases). T-DM1, trastuzumab emtansine is an antibody-drug conjugate composed by the monoclonal antibody trastuzumab and the microtubule polymerization inhibitor DM1. The activity of T-DM1 has been studied in breast cancer but the role of T-DM1 in lung cancer remains unexplored. Methods Antiproliferative and proapoptotic effects of T-DM1 have been investigated in different NSCLC cell lines by MTT, crystal violet staining, morphological study and Western blotting. HER-2 expression and cell cycle were evaluated by flow cytometry and Western blotting. Antibody dependent cell cytotoxicity (ADCC) was measured with a CytoTox assay. Xenografted mice model has been generated using a NSCLC cell line to evaluate the effect of T-DM1 on tumor growth. Moreover, a morphometric and immunohistochemical analysis of tumor xenografts was conducted. Results In this study we investigated the effect of T-DM1 in a panel of NSCLC cell lines with different HER-2 expression levels, in H1781 cell line carrying HER-2 mutation and in gefitinib resistant HER-2 overexpressing PC9/HER2cl1 cell clone. T-DM1 efficiently inhibited proliferation with arrest in G2-M phase and induced cell death by apoptosis in cells with a significant level of surface expression of HER-2. Antibody-dependent cytotoxicity assay documented that T-DM1 maintained the same activity of trastuzumab. Our data also suggest that targeting HER-2 with T-DM1 potentially overcomes gefitinib resistance. In addition a correlation between cell density/tumor size with both HER-2 expression and T-DM1 activity was established in vitro and in an in vivo xenograft model. Conclusions Our results indicate that targeting HER-2 with T-DM1 may offer a new therapeutic approach in HER-2 over-expressing lung cancers including those resistant to EGFR TKIs.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Roberta R Alfieri
- Department of Clinical and Experimental Medicine, University of Parma, Via Gramsci 14, Parma, 43126, Italy.
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96
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Amiri-Kordestani L, Blumenthal GM, Xu QC, Zhang L, Tang SW, Ha L, Weinberg WC, Chi B, Candau-Chacon R, Hughes P, Russell AM, Miksinski SP, Chen XH, McGuinn WD, Palmby T, Schrieber SJ, Liu Q, Wang J, Song P, Mehrotra N, Skarupa L, Clouse K, Al-Hakim A, Sridhara R, Ibrahim A, Justice R, Pazdur R, Cortazar P. FDA approval: ado-trastuzumab emtansine for the treatment of patients with HER2-positive metastatic breast cancer. Clin Cancer Res 2014; 20:4436-41. [PMID: 24879797 DOI: 10.1158/1078-0432.ccr-14-0012] [Citation(s) in RCA: 211] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
On February 22, 2013, the FDA licensed ado-trastuzumab emtansine (Kadcyla; Genentech, Inc.) for use as a single agent for the treatment of patients with human epidermal growth factor receptor 2 (HER2)-positive metastatic breast cancer (MBC) who previously received trastuzumab and a taxane, separately or in combination. The clinical basis for licensure was a phase III trial in 991 patients with HER2-positive MBC that randomly allocated patients to receive ado-trastuzumab emtansine (n=495) or lapatinib in combination with capecitabine (n=496). The coprimary endpoints were progression-free survival (PFS) based on tumor assessments by an independent review committee and overall survival (OS). Statistically significant improvements in PFS and OS were observed in patients receiving ado-trastuzumab emtansine compared with patients receiving lapatinib plus capecitabine [difference in PFS medians of 3.2 months, HR, 0.65 (95% confidence interval, CI, 0.55-0.77), P<0.0001 and difference in OS medians of 5.8 months, HR, 0.68 (95% CI, 0.55-0.85), P=0.0006]. The most common adverse reactions in patients receiving ado-trastuzumab emtansine were fatigue, nausea, musculoskeletal pain, thrombocytopenia, headache, increased aminotransferase levels, and constipation. Other significant adverse reactions included hepatobiliary disorders and left ventricular dysfunction. Given the PFS and OS results, the benefit-risk profile was considered favorable.
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Affiliation(s)
- Laleh Amiri-Kordestani
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland.
| | - Gideon M Blumenthal
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Qiang Casey Xu
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Lijun Zhang
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Shenghui W Tang
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Linan Ha
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Wendy C Weinberg
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Bo Chi
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Reyes Candau-Chacon
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Patricia Hughes
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Anne M Russell
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Sarah Pope Miksinski
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Xiao Hong Chen
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - W David McGuinn
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Todd Palmby
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Sarah J Schrieber
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Qi Liu
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Jian Wang
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Pengfei Song
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Nitin Mehrotra
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Lisa Skarupa
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Kathleen Clouse
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Ali Al-Hakim
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Rajeshwari Sridhara
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Amna Ibrahim
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Robert Justice
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Richard Pazdur
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
| | - Patricia Cortazar
- Center for Drug Evaluation and Research, U.S. Food and Drug Administration, White Oak, Maryland
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Das V, Sim DA, Miller JH. Effect of taxoid and nontaxoid site microtubule-stabilizing agents on axonal transport of mitochondria in untransfected and ECFP-htau40-transfected rat cortical neurons in culture. J Neurosci Res 2014; 92:1155-66. [PMID: 24788108 DOI: 10.1002/jnr.23394] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2013] [Revised: 01/26/2014] [Accepted: 03/26/2014] [Indexed: 01/09/2023]
Abstract
An important aspect of synaptic plasticity in the brain is axonal transport of essential components such as mitochondria from the soma to the synapse. For uninterrupted transport of cellular cargo down the axon, functional microtubules are required. Altered microtubule dynamics induced by changes in expression of microtubule-associated tau protein affects normal microtubule function and interferes with axonal transport. Here we investigate the effects of the nontaxoid-binding-site microtubule-stabilizing agents peloruside A (PelA) and laulimalide, compared with the taxoid-site-binding agents paclitaxel (Ptx) and ixabepilone, on axonal transport of mitochondria in 1-day-old rat pup cerebral cortical neuron cultures. The differences in effects of these two types of compound on mitochondrial trafficking were specifically compared under conditions of excess tau expression. PelA and laulimalide had no adverse effects on their own on mitochondrial transport compared with Ptx and ixabepilone, which inhibited mitochondrial run length at higher concentrations. PelA, like Ptx, was able to partially reverse the blocked mitochondrial transport seen in ECFP-htau40-overexpressing neurons, although at higher concentrations of microtubule-stabilizing agent, the PelA response was improved over the Ptx response. These results support a neuroprotective effect of microtubule stabilization in maintaining axonal transport in neurons overexpressing tau protein and may be beneficial in reducing the severity of neurodegenerative diseases such as Alzheimer's disease.
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Affiliation(s)
- Viswanath Das
- Laboratory of Experimental Medicine, Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University, Olomouc, Czech Republic; School of Biological Sciences and Centre for Biodiscovery, Victoria University of Wellington, Wellington, New Zealand
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98
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Risinger AL, Riffle SM, Lopus M, Jordan MA, Wilson L, Mooberry SL. The taccalonolides and paclitaxel cause distinct effects on microtubule dynamics and aster formation. Mol Cancer 2014; 13:41. [PMID: 24576146 PMCID: PMC4015978 DOI: 10.1186/1476-4598-13-41] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Accepted: 02/23/2014] [Indexed: 02/05/2023] Open
Abstract
Background Microtubule stabilizers suppress microtubule dynamics and, at the lowest antiproliferative concentrations, disrupt the function of mitotic spindles, leading to mitotic arrest and apoptosis. At slightly higher concentrations, these agents cause the formation of multiple mitotic asters with distinct morphologies elicited by different microtubule stabilizers. Results We tested the hypothesis that two classes of microtubule stabilizing drugs, the taxanes and the taccalonolides, cause the formation of distinct aster structures due, in part, to differential effects on microtubule dynamics. Paclitaxel and the taccalonolides suppressed the dynamics of microtubules formed from purified tubulin as well as in live cells. Both agents suppressed microtubule dynamic instability, with the taccalonolides having a more pronounced inhibition of microtubule catastrophe, suggesting that they stabilize the plus ends of microtubules more effectively than paclitaxel. Live cell microscopy was also used to evaluate the formation and resolution of asters after drug treatment. While each drug had similar effects on initial formation, substantial differences were observed in aster resolution. Paclitaxel-induced asters often coalesced over time resulting in fewer, larger asters whereas numerous compact asters persisted once they were formed in the presence of the taccalonolides. Conclusions We conclude that the increased resistance of microtubule plus ends to catastrophe may play a role in the observed inability of taccalonolide-induced asters to coalesce during mitosis, giving rise to the distinct morphologies observed after exposure to these agents.
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Affiliation(s)
- April L Risinger
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA.
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The CD37-targeted antibody-drug conjugate IMGN529 is highly active against human CLL and in a novel CD37 transgenic murine leukemia model. Leukemia 2014; 28:1501-10. [PMID: 24445867 PMCID: PMC4090271 DOI: 10.1038/leu.2014.32] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 12/27/2013] [Accepted: 01/08/2014] [Indexed: 12/18/2022]
Abstract
Therapeutic regimens for chronic lymphocytic leukemia (CLL) have increasingly utilized monoclonal antibodies since the chimeric anti-CD20 antibody rituximab was introduced. Despite improved clinical outcomes, current CLL therapies are not curative. Therefore, antibodies with greater efficacy and novel targets are desirable. One promising target is CD37, a tetraspanin protein highly expressed on malignant B-cells in CLL and non-Hodgkin lymphoma. Although several novel CD37-directed therapeutics are emerging, detailed preclinical evaluation of these agents is limited by lack of appropriate animal models with spontaneous leukemia expressing the human CD37 (hCD37) target. To address this, we generated a murine CLL model that develops transplantable hCD37+ leukemia. Subsequently, we engrafted healthy mice with this leukemia to evaluate IMGN529, a novel hCD37-targeting antibody-drug conjugate. IMGN529 rapidly eliminated peripheral blood leukemia and improved overall survival. In contrast, the antibody component of IMGN529 could not alter disease course despite exhibiting substantial in vitro cytotoxicity. Furthermore, IMGN529 is directly cytotoxic to human CLL in vitro, depletes B-cells in patient whole blood and promotes killing by macrophages and natural killer cells. Our results demonstrate the utility of a novel mouse model for evaluating anti-human CD37 therapeutics and highlight the potential of IMGN529 for treatment of CLL and other CD37-positive B-cell malignancies.
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100
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Whiteman KR, Johnson HA, Mayo MF, Audette CA, Carrigan CN, LaBelle A, Zukerberg L, Lambert JM, Lutz RJ. Lorvotuzumab mertansine, a CD56-targeting antibody-drug conjugate with potent antitumor activity against small cell lung cancer in human xenograft models. MAbs 2014; 6:556-66. [PMID: 24492307 DOI: 10.4161/mabs.27756] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Lorvotuzumab mertansine (LM) is an antibody-drug conjugate composed of a humanized anti-CD56 antibody, lorvotuzumab, linked via a cleavable disulfide linker to the tubulin-binding maytansinoid DM1. CD56 is expressed on most small cell lung cancers (SCLC), providing a promising therapeutic target for treatment of this aggressive cancer, which has a poor five-year survival rate of only 5-10%. We performed immunohistochemical staining on SCLC tumor microarrays, which confirmed that CD56 is expressed at high levels on most (~74%) SCLC tumors. Conjugation of lorvotuzumab with DM1 did not alter its specific binding to cells and LM demonstrated potent target-dependent cytotoxicity against CD56-positive SCLC cells in vitro. The anti-tumor activity of LM was evaluated against SCLC xenograft models in mice, both as monotherapy and in combination with platinum/etoposide and paclitaxel/carboplatin. Dose-dependent and antigen-specific anti-tumor activity of LM monotherapy was demonstrated at doses as low as 3 mg/kg. LM was highly active in combination with standard-of-care platinum/etoposide therapies, even in relatively resistant xenograft models. LM demonstrated outstanding anti-tumor activity in combination with carboplatin/etoposide, with superior activity over chemotherapy alone when LM was used in combinations at significantly reduced doses (6-fold below the minimally efficacious dose for LM monotherapy). The combination of LM with carboplatin/paclitaxel was also highly active. This study provides the rationale for clinical evaluation of LM as a promising novel targeted therapy for SCLC, both as monotherapy and in combination with chemotherapy.
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Affiliation(s)
| | | | | | | | | | | | - Lawrence Zukerberg
- Harvard Medical School and Massachusetts General Hospital; Boston, MA USA
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