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O'Kane GM, Labbé C, Doherty MK, Young K, Albaba H, Leighl NB. Monitoring and Management of Immune-Related Adverse Events Associated With Programmed Cell Death Protein-1 Axis Inhibitors in Lung Cancer. Oncologist 2016; 22:70-80. [PMID: 27534573 DOI: 10.1634/theoncologist.2016-0164] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Accepted: 06/29/2016] [Indexed: 12/12/2022] Open
Abstract
Monoclonal antibodies targeting programmed cell death protein-1 (PD-1) represent a new treatment paradigm in non-small cell lung cancer. Three phase III trials have demonstrated a survival benefit and improved tolerability of nivolumab and pembrolizumab when compared with standard second-line chemotherapy. Nevertheless, the adverse events associated with PD-1 inhibitors are unique; early recognition and treatment are essential. This review summarizes the required monitoring and appropriate management of immune-related adverse events in lung cancer patients receiving these agents. THE ONCOLOGIST 2017;22:70-80 IMPLICATIONS FOR PRACTICE: : The potential adverse events of immune checkpoint inhibitors differ from conventional chemotherapy and can require a multidisciplinary approach. Continued education is important for all physicians to ensure optimal care for patients.
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Affiliation(s)
- Grainne M O'Kane
- Department of Medical Oncology and Hematology, Princess Margaret Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Catherine Labbé
- Department of Medical Oncology and Hematology, Princess Margaret Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Mark K Doherty
- Department of Medical Oncology and Hematology, Princess Margaret Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Kelvin Young
- Department of Medical Oncology and Hematology, Princess Margaret Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Hamzeh Albaba
- Department of Medical Oncology and Hematology, Princess Margaret Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Natasha B Leighl
- Department of Medical Oncology and Hematology, Princess Margaret Cancer Centre, University of Toronto, Toronto, Ontario, Canada
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Chan TSY, Khong PL, Kwong YL. Pembrolizumab for relapsed anaplastic large cell lymphoma after allogeneic haematopoietic stem cell transplantation: efficacy and safety. Ann Hematol 2016; 95:1913-5. [PMID: 27473193 DOI: 10.1007/s00277-016-2764-1] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Accepted: 07/20/2016] [Indexed: 11/26/2022]
MESH Headings
- Adult
- Antibodies, Monoclonal, Humanized/immunology
- Antibodies, Monoclonal, Humanized/therapeutic use
- Antineoplastic Agents/immunology
- Antineoplastic Agents/therapeutic use
- Antineoplastic Combined Chemotherapy Protocols/therapeutic use
- B7-H1 Antigen/antagonists & inhibitors
- B7-H1 Antigen/immunology
- Brentuximab Vedotin
- Female
- Graft vs Host Disease/etiology
- Hematopoietic Stem Cell Transplantation
- Humans
- Immunoconjugates/administration & dosage
- Lung Diseases, Fungal/diagnostic imaging
- Lung Diseases, Fungal/etiology
- Lymphoma, Large-Cell, Anaplastic/drug therapy
- Lymphoma, Large-Cell, Anaplastic/therapy
- Neoplasm Proteins/antagonists & inhibitors
- Neoplasm Proteins/immunology
- Positron Emission Tomography Computed Tomography
- Recurrence
- Remission Induction
- Salvage Therapy
- Transplantation, Homologous
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Affiliation(s)
- Thomas S Y Chan
- Department of Medicine, Queen Mary Hospital, Pokfulam Road, Pok Fu Lam, Hong Kong
| | - Pek-Lan Khong
- Department of Diagnostic Radiology, Queen Mary Hospital, Pok Fu Lam, Hong Kong
| | - Yok-Lam Kwong
- Department of Medicine, Queen Mary Hospital, Pokfulam Road, Pok Fu Lam, Hong Kong.
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van Brummelen EMJ, Ros W, Wolbink G, Beijnen JH, Schellens JHM. Antidrug Antibody Formation in Oncology: Clinical Relevance and Challenges. Oncologist 2016; 21:1260-1268. [PMID: 27440064 DOI: 10.1634/theoncologist.2016-0061] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 06/09/2016] [Indexed: 12/12/2022] Open
Abstract
: In oncology, an increasing number of targeted anticancer agents and immunotherapies are of biological origin. These biological drugs may trigger immune responses that lead to the formation of antidrug antibodies (ADAs). ADAs are directed against immunogenic parts of the drug and may affect efficacy and safety. In other medical fields, such as rheumatology and hematology, the relevance of ADA formation is well established. However, the relevance of ADAs in oncology is just starting to be recognized, and literature on this topic is scarce. In an attempt to fill this gap in the literature, we provide an up-to-date status of ADA formation in oncology. In this focused review, data on ADAs was extracted from 81 clinical trials with biological anticancer agents. We found that most biological anticancer drugs in these trials are immunogenic and induce ADAs (63%). However, it is difficult to establish the clinical relevance of these ADAs. In order to determine this relevance, the possible effects of ADAs on pharmacokinetics, efficacy, and safety parameters need to be investigated. Our data show that this was done in fewer than 50% of the trials. In addition, we describe the incidence and consequences of ADAs for registered agents. We highlight the challenges in ADA detection and argue for the importance of validating, standardizing, and describing well the used assays. Finally, we discuss prevention strategies such as immunosuppression and regimen adaptations. We encourage the launch of clinical trials that explore these strategies in oncology. IMPLICATIONS FOR PRACTICE Because of the increasing use of biologicals in oncology, many patients are at risk of developing antidrug antibodies (ADAs) during therapy. Although clinical consequences are uncertain, ADAs may affect pharmacokinetics, patient safety, and treatment efficacy. ADA detection and reporting is currently highly inconsistent, which makes it difficult to evaluate the clinical consequences. Standardized reporting of ADA investigations in the context of the aforementioned parameters is critical to understanding the relevance of ADA formation for each drug. Furthermore, the development of trials that specifically aim to investigate clinical prevention strategies in oncology is needed.
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Affiliation(s)
- Emilie M J van Brummelen
- Department of Clinical Pharmacology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Willeke Ros
- Department of Clinical Pharmacology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Gertjan Wolbink
- Immunopathology, Sanquin Research, Amsterdam, The Netherlands Reade Amsterdam Rheumatology and Immunology Center, Amsterdam, The Netherlands
| | - Jos H Beijnen
- Department of Pharmacy, The Netherlands Cancer Institute, Amsterdam, The Netherlands Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | - Jan H M Schellens
- Department of Clinical Pharmacology, The Netherlands Cancer Institute, Amsterdam, The Netherlands Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
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Venniyoor A. Immune checkpoint inhibitors for Indian patients: A note of caution. Indian J Cancer 2016; 53:468-469. [PMID: 28244488 DOI: 10.4103/0019-509x.200660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Affiliation(s)
- A Venniyoor
- National Oncology Center, The Royal Hospital, Muscat, Sultanate of Oman
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55
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Guo R, Cao L, Guo W, Liu H, Xu H, Fang Q, Hong Z. HER2-targeted immunotoxins with low nonspecific toxicity and immunogenicity. Biochem Biophys Res Commun 2016; 475:93-9. [PMID: 27178207 DOI: 10.1016/j.bbrc.2016.05.044] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Accepted: 05/09/2016] [Indexed: 01/31/2023]
Abstract
Immunotoxins have efficient anti-tumor activity due to their extreme potency. However, dose-limiting off-target toxicity and immunogenicity are the critical barriers for these immunotoxins to be used in a clinical setting. In this study, we designed a Pseudomonas exotoxin A (PE)-based human epidermal growth factor receptor-2 (HER2)-specific immunotoxin HER2-PE25-X7 by deleting most of domain II and introducing seven point mutations into domain III of the PE38 toxin. The anti-cancer activity, off-target toxicity and immunogenicity of this immunotoxin were carefully evaluated in vitro and in vivo. This new construct maintained the therapeutic potency of the original PE38-based immunotoxin HER2-PE38, with a greatly reduced off-target toxicity and immunogenicity. To compare with HER2-PE38, which resulted in the death of most of the mice after a single dose of 1.0 mg/kg, the new construct was completely tolerated at a dose of 10 mg/kg by the mice and almost completely depleted the tumor after treatment with five doses of 5 mg/kg of the immunotoxin. This work demonstrates a potentially attractive therapeutic modality for HER2-specific cancer treatment.
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Affiliation(s)
- Rui Guo
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin, 300071, PR China
| | - Li Cao
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin, 300071, PR China
| | - Wenjun Guo
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin, 300071, PR China
| | - Hui Liu
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin, 300071, PR China
| | - Hua Xu
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin, 300071, PR China
| | - Qi Fang
- Quzhou People's Hospital, Quzhou, Zhejiang, 324000, PR China.
| | - Zhangyong Hong
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin, 300071, PR China.
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Abstract
BACKGROUND Ganoderma lucidum is a natural medicine that is widely used and recommended by Asian physicians and naturopaths for its supporting effects on immune system. Laboratory research and a handful of preclinical trials have suggested that G. lucidum carries promising anticancer and immunomodulatory properties. The popularity of taking G. lucidum as an alternative medicine has been increasing in cancer patients. However, there is no systematic review that has been conducted to evaluate the actual benefits of G. lucidum in cancer treatment. OBJECTIVES To evaluate the clinical effects of G. lucidum on long-term survival, tumour response, host immune functions and quality of life in cancer patients, as well as adverse events associated with its use. SEARCH METHODS We searched an extensive set of databases including the Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE, EMBASE, NIH, AMED, CBM, CNKI, CMCC and VIP Information/Chinese Scientific Journals Database was searched for randomised controlled trials (RCTs) in October 2011. Other strategies used were scanning the references of articles retrieved, handsearching of the International Journal of Medicinal Mushrooms and contact with herbal medicine experts and manufacturers of G. lucidum. For this update we updated the searches in February 2016. SELECTION CRITERIA To be eligible for being included in this review, studies had to be RCTs comparing the efficacy of G. lucidum medications to active or placebo control in patients with cancer that had been diagnosed by pathology. All types and stages of cancer were eligible for inclusion. Trials were not restricted on the basis of language. DATA COLLECTION AND ANALYSIS Five RCTs met the inclusion criteria and were included in this review. Two independent review authors assessed the methodological quality of individual trials. Common primary outcomes were tumour response evaluated according to the World Health Organization (WHO) criteria, immune function parameters such as natural killer (NK)-cell activity and T-lymphocyte co-receptor subsets, and quality of life measured by the Karnofsky scale score. No trial had recorded long-term survival rates. Associated adverse events were reported in one study. A meta-analysis was performed to pool available data from the primary trials. Results were gauged using relative risks (RR) and standard mean differences (SMD) for dichotomous and continuous data respectively, with a 95% confidence interval (CI). MAIN RESULTS The methodological quality of primary studies was generally unsatisfying and the results were reported inadequately in many aspects. Additional information was not available from primary trialists. The meta-analysis results showed that patients who had been given G. lucidum alongside with chemo/radiotherapy were more likely to respond positively compared to chemo/radiotherapy alone (RR 1.50; 95% CI 0.90 to 2.51, P = 0.02). G. lucidum treatment alone did not demonstrate the same regression rate as that seen in combined therapy. The results for host immune function indicators suggested that G. lucidum simultaneously increases the percentage of CD3, CD4 and CD8 by 3.91% (95% CI 1.92% to 5.90%, P < 0.01), 3.05% (95% CI 1.00% to 5.11%, P < 0.01) and 2.02% (95% CI 0.21% to 3.84%, P = 0.03), respectively. In addition, leukocyte, NK-cell activity and CD4/CD8 ratio were marginally elevated. Four studies showed that patients in the G. lucidum group had relatively improved quality of life in comparison to controls. One study recorded minimal side effects, including nausea and insomnia. No significant haematological or hepatological toxicity was reported. AUTHORS' CONCLUSIONS Our review did not find sufficient evidence to justify the use of G. lucidum as a first-line treatment for cancer. It remains uncertain whether G. lucidum helps prolong long-term cancer survival. However, G. lucidum could be administered as an alternative adjunct to conventional treatment in consideration of its potential of enhancing tumour response and stimulating host immunity. G. lucidum was generally well tolerated by most participants with only a scattered number of minor adverse events. No major toxicity was observed across the studies. Although there were few reports of harmful effect of G. lucidum, the use of its extract should be judicious, especially after thorough consideration of cost-benefit and patient preference. Future studies should put emphasis on the improvement in methodological quality and further clinical research on the effect of G. lucidum on cancer long-term survival are needed. An update to this review will be performed every two years.
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Affiliation(s)
- Xingzhong Jin
- University of TasmaniaMenzies Institute for Medical Research17 Liverpool StreetHobartTasmaniaAustralia7000
| | | | | | - Godfrey CF Chan
- The University of Hong Kong, Queen Mary HospitalDepartment of Pediatrics and Adolescent Medicine121 Pokfulam RoadHong KongChina
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57
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Graham F, Superstein R, Carret AS, Paradis L, Hamel P, Des Roches A. First case of type IV hypersensitivity to periocular topotecan. Ann Allergy Asthma Immunol 2016; 116:469-70. [PMID: 27021003 DOI: 10.1016/j.anai.2016.03.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Revised: 02/26/2016] [Accepted: 03/01/2016] [Indexed: 11/17/2022]
Affiliation(s)
- François Graham
- Centre hospitalier de l'Université de Montréal, Hôpital Notre-Dame, Montreal, Quebec, Canada; Department of Allergy and Immunology, Centre hospitalier universitaire Sainte-Justine, Montreal, Quebec, Canada
| | - Rosanne Superstein
- Department of Ophthalmology, Centre hospitalier universitaire Sainte-Justine, Montreal, Quebec, Canada
| | - Anne-Sophie Carret
- Department of Hematology and Oncology, Centre hospitalier universitaire Sainte-Justine, Montreal, Quebec, Canada
| | - Louis Paradis
- Centre hospitalier de l'Université de Montréal, Hôpital Notre-Dame, Montreal, Quebec, Canada; Department of Allergy and Immunology, Centre hospitalier universitaire Sainte-Justine, Montreal, Quebec, Canada
| | - Patrick Hamel
- Department of Ophthalmology, Centre hospitalier universitaire Sainte-Justine, Montreal, Quebec, Canada
| | - Anne Des Roches
- Department of Allergy and Immunology, Centre hospitalier universitaire Sainte-Justine, Montreal, Quebec, Canada.
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58
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Tang H, Wang Y, Chlewicki LK, Zhang Y, Guo J, Liang W, Wang J, Wang X, Fu YX. Facilitating T Cell Infiltration in Tumor Microenvironment Overcomes Resistance to PD-L1 Blockade. Cancer Cell 2016; 29:285-296. [PMID: 26977880 PMCID: PMC4794755 DOI: 10.1016/j.ccell.2016.02.004] [Citation(s) in RCA: 265] [Impact Index Per Article: 33.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Revised: 12/30/2015] [Accepted: 02/08/2016] [Indexed: 12/31/2022]
Abstract
Immune checkpoint blockade therapies fail to induce responses in the majority of cancer patients, so how to increase the objective response rate becomes an urgent challenge. Here, we demonstrate that sufficient T cell infiltration in tumor tissues is a prerequisite for response to PD-L1 blockade. Targeting tumors with tumor necrosis factor superfamily member LIGHT activates lymphotoxin β-receptor signaling, leading to the production of chemokines that recruit massive numbers of T cells. Furthermore, targeting non-T cell-inflamed tumor tissues by antibody-guided LIGHT creates a T cell-inflamed microenvironment and overcomes tumor resistance to checkpoint blockade. Our data indicate that targeting LIGHT might be a potent strategy to increase the responses to checkpoint blockades and other immunotherapies in non-T cell-inflamed tumors.
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Affiliation(s)
- Haidong Tang
- Department of Pathology and Committee on Immunology, University of Chicago, Chicago, IL 60637, USA; Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX 75235, USA
| | - Yang Wang
- Department of Pathology and Committee on Immunology, University of Chicago, Chicago, IL 60637, USA; Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX 75235, USA
| | - Lukasz K Chlewicki
- Department of Pathology and Committee on Immunology, University of Chicago, Chicago, IL 60637, USA
| | - Yuan Zhang
- Department of Pathology and Committee on Immunology, University of Chicago, Chicago, IL 60637, USA
| | - Jingya Guo
- Chinese Academy of Science Key Laboratory for Infection and Immunity, IBP-UTSW Joint Immunotherapy Group, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Wei Liang
- Chinese Academy of Science Key Laboratory for Infection and Immunity, IBP-UTSW Joint Immunotherapy Group, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Jieyi Wang
- Oncology Biologics, AbbVie Biotherapeutics Research (ABR), 1500 Seaport Boulevard, Redwood City, CA 94063, USA
| | | | - Yang-Xin Fu
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX 75235, USA; Chinese Academy of Science Key Laboratory for Infection and Immunity, IBP-UTSW Joint Immunotherapy Group, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China.
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Lindorfer MA, Cook EM, Tupitza JC, Zent CS, Burack R, de Jong RN, Beurskens FJ, Schuurman J, Parren PWHI, Taylor RP. Real-time analysis of the detailed sequence of cellular events in mAb-mediated complement-dependent cytotoxicity of B-cell lines and of chronic lymphocytic leukemia B-cells. Mol Immunol 2015; 70:13-23. [PMID: 26690706 DOI: 10.1016/j.molimm.2015.12.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Revised: 12/03/2015] [Accepted: 12/04/2015] [Indexed: 12/16/2022]
Abstract
Complement-dependent cytotoxicity is an important mechanism of action of certain mAbs used in cancer immunotherapy, including ofatumumab and rituximab. However, the detailed sequence of cellular changes that occur in nucleated cells attacked by mAb and complement has not been delineated. Recently developed CD20 mAbs, engineered to form hexamers on binding to cells, react with B-cells in serum, chelate C1q, and then activate complement and promote cell killing considerably more effectively than their wild-type precursors. We used these engineered mAbs as a model to investigate the sequence of events that occur when mAbs bind to B-cell lines and to primary cells from patients with chronic lymphocytic leukemia and then activate complement. Based on four-color confocal microscopy real-time movies and high resolution digital imaging, we find that after CD20 mAb binding and C1q uptake, C3b deposits on cells, followed by Ca(2+) influx, revealed by bright green signals generated on cells labeled with FLUO-4, a Ca(2+) indicator. The bright FLUO-4/Ca(2+) signal fades, replaced by punctate green signals in mitochondria, indicating Ca(2+) localization. This step leads to mitochondrial poisoning followed by cell death. The entire sequence is completed in <2 min for hexamerization-enhanced CD20 mAb-mediated killing. To our knowledge this is the first time the entire process has been characterized in detail in real time. By identifying multiple discrete steps in the cytotoxic pathway for nucleated cells our findings may inform future development and more effective application of complement-fixing mAbs to cancer treatment.
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Affiliation(s)
- Margaret A Lindorfer
- Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA, USA
| | - Erika M Cook
- Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA, USA
| | - Jillian C Tupitza
- Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA, USA
| | - Clive S Zent
- Wilmot Cancer Institute, University of Rochester Medical Center, Rochester, NY, USA
| | - Richard Burack
- Department of Pathology, University of Rochester Medical Center, Rochester, NY, USA
| | | | | | | | | | - Ronald P Taylor
- Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA, USA.
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Eroglu Z, Kim DW, Wang X, Camacho LH, Chmielowski B, Seja E, Villanueva A, Ruchalski K, Glaspy JA, Kim KB, Hwu WJ, Ribas A. Long term survival with cytotoxic T lymphocyte-associated antigen 4 blockade using tremelimumab. Eur J Cancer 2015; 51:2689-97. [PMID: 26364516 PMCID: PMC4821004 DOI: 10.1016/j.ejca.2015.08.012] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 06/25/2015] [Accepted: 08/14/2015] [Indexed: 11/23/2022]
Abstract
PURPOSE One of the hallmarks of cancer immunotherapy is the long duration of responses, evident with cytokines like interleukin-2 or a variety of cancer vaccines. However, there is limited information available on very long term outcomes of patients treated with anti-cytotoxic T lymphocyte-associated antigen 4 (CTLA-4) antibodies. Tremelimumab is an anti-CTLA-4 antibody of immunoglobulin G2 (IgG2) isotype initially tested in patients with advanced melanoma over 12 years ago. METHODS We reviewed the outcomes of patients with advanced melanoma enrolled in four phase 1 and 2 tremelimumab trials at two sites to determine response rates and long-term survival. RESULTS A total of 143 patients were enrolled at two institutions from 2002 to 2008. Tremelimumab administration varied between a single dose of 0.01 mg/kg and 15 mg/kg every 3 months. Median overall survival was 13 months (95% confidence interval (CI), 10-16.6), ranging from less than a month to 12+ years. An objective response rate of 15.6% was observed, with median duration of response of 6.5 years, range of 3-136+ months. The Kaplan-Meier estimated 5 year survival rate was 20% (95% CI, 13-26%), with 10 and 12.5 year survival rates of 16% (95% CI, 9-23%). CONCLUSIONS CTLA-4 blockade with tremelimumab can lead to very long duration of objective anti-tumour responses beyond 12 years.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Antibodies, Monoclonal/immunology
- Antibodies, Monoclonal/therapeutic use
- Antibodies, Monoclonal, Humanized
- Antineoplastic Agents/immunology
- Antineoplastic Agents/therapeutic use
- CTLA-4 Antigen/antagonists & inhibitors
- CTLA-4 Antigen/immunology
- Clinical Trials, Phase I as Topic
- Clinical Trials, Phase II as Topic
- Dose-Response Relationship, Drug
- Drug Administration Schedule
- Female
- Humans
- Immunotherapy/methods
- Kaplan-Meier Estimate
- Male
- Melanoma/immunology
- Melanoma/mortality
- Melanoma/therapy
- Middle Aged
- Outcome Assessment, Health Care/methods
- Outcome Assessment, Health Care/statistics & numerical data
- Remission Induction
- Retrospective Studies
- Survival Rate
- Survivors/statistics & numerical data
- Time Factors
- Young Adult
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Affiliation(s)
- Zeynep Eroglu
- Department of Medical Oncology, City of Hope National Medical Center, Duarte, CA, USA
| | - Dae Won Kim
- Department of Melanoma Medical Oncology, The University of Texas-MD Anderson Cancer Center, Houston, TX, USA
| | - Xiaoyan Wang
- Department of Medicine Statistics Core, University of California Los Angeles, Los Angeles, CA, USA
| | - Luis H Camacho
- St. Luke's Medical Center Cancer Center, Houston, TX, USA
| | - Bartosz Chmielowski
- Department of Medicine, Division of Hematology/Oncology, Jonsson Comprehensive Cancer Center at UCLA, Los Angeles, CA, USA
| | - Elizabeth Seja
- Department of Medicine, Division of Hematology/Oncology, Jonsson Comprehensive Cancer Center at UCLA, Los Angeles, CA, USA
| | - Arturo Villanueva
- Department of Medicine, Division of Hematology/Oncology, Jonsson Comprehensive Cancer Center at UCLA, Los Angeles, CA, USA
| | - Kathleen Ruchalski
- Department of Radiology, University of California Los Angeles, Los Angeles, CA, USA
| | - John A Glaspy
- Department of Medicine, Division of Hematology/Oncology, Jonsson Comprehensive Cancer Center at UCLA, Los Angeles, CA, USA
| | - Kevin B Kim
- Department of Melanoma Medical Oncology, The University of Texas-MD Anderson Cancer Center, Houston, TX, USA; California Pacific Medical Center, San Francisco, CA, USA
| | - Wen-Jen Hwu
- Department of Melanoma Medical Oncology, The University of Texas-MD Anderson Cancer Center, Houston, TX, USA
| | - Antoni Ribas
- Department of Medicine, Division of Hematology/Oncology, Jonsson Comprehensive Cancer Center at UCLA, Los Angeles, CA, USA.
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Schmohl JU, Todhunter D, Oh S, Vallera DA. Mutagenic Deimmunization of Diphtheria Toxin for Use in Biologic Drug Development. Toxins (Basel) 2015; 7:4067-82. [PMID: 26473923 PMCID: PMC4626721 DOI: 10.3390/toxins7104067] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 09/09/2015] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Targeted toxins require multiple treatments and therefore must be deimmunized. We report a method of protein deimmunization based on the point mutation of highly hydrophilic R, K, D, E, and Q amino acids on the molecular surface of truncated diphtheria-toxin (DT390). METHODS Based on their surface position derived from an X-ray-crystallographic model, residues were chosen for point mutation that were located in prominent positions on the molecular surface and away from the catalytic site. Mice were immunized with a targeted toxin containing either a mutated DT390 containing seven critical point mutations or the non-mutated parental toxin form. RESULTS Serum analysis revealed a significant 90% reduction in anti-toxin antibodies in mice immunized with the mutant, but not the parental drug form despite multiple immunizations. The experiment was repeated in a second strain of mice with a different MHC-haplotype to address whether point mutation removed T or B cell epitopes. Findings were identical indicating that B cell epitopes were eliminated from DT. The mutant drug form lost only minimal activity in vitro as well as in vivo. CONCLUSION These findings indicate that this method may be effective for deimmunizing of other proteins and that discovery of a deimmunized form of DT may lead to the development of more effective targeted toxin.
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Affiliation(s)
- Joerg U Schmohl
- University of Minnesota Masonic Cancer Center, Section of Molecular Cancer Therapeutics, Therapeutic Radiology-Radiation Oncology, University of Minnesota, Minneapolis, MN 55423, USA.
- Department for Hematology and Oncology, Department of Medicine 2, University Hospital of Tuebingen, Tuebingen 72076, Germany.
| | - Deborah Todhunter
- University of Minnesota Masonic Cancer Center, Section of Molecular Cancer Therapeutics, Therapeutic Radiology-Radiation Oncology, University of Minnesota, Minneapolis, MN 55423, USA.
| | - Seung Oh
- University of Minnesota Masonic Cancer Center, Section of Molecular Cancer Therapeutics, Therapeutic Radiology-Radiation Oncology, University of Minnesota, Minneapolis, MN 55423, USA.
| | - Daniel A Vallera
- University of Minnesota Masonic Cancer Center, Section of Molecular Cancer Therapeutics, Therapeutic Radiology-Radiation Oncology, University of Minnesota, Minneapolis, MN 55423, USA.
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Liu J, Wang L, Zhao F, Tseng S, Narayanan C, Shura L, Willingham S, Howard M, Prohaska S, Volkmer J, Chao M, Weissman IL, Majeti R. Pre-Clinical Development of a Humanized Anti-CD47 Antibody with Anti-Cancer Therapeutic Potential. PLoS One 2015; 10:e0137345. [PMID: 26390038 PMCID: PMC4577081 DOI: 10.1371/journal.pone.0137345] [Citation(s) in RCA: 341] [Impact Index Per Article: 37.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Accepted: 08/14/2015] [Indexed: 12/25/2022] Open
Abstract
CD47 is a widely expressed cell surface protein that functions as a regulator of phagocytosis mediated by cells of the innate immune system, such as macrophages and dendritic cells. CD47 serves as the ligand for a receptor on these innate immune cells, SIRP-alpha, which in turn delivers an inhibitory signal for phagocytosis. We previously found increased expression of CD47 on primary human acute myeloid leukemia (AML) stem cells, and demonstrated that blocking monoclonal antibodies directed against CD47 enabled the phagocytosis and elimination of AML, non-Hodgkin’s lymphoma (NHL), and many solid tumors in xenograft models. Here, we report the development of a humanized anti-CD47 antibody with potent efficacy and favorable toxicokinetic properties as a candidate therapeutic. A novel monoclonal anti-human CD47 antibody, 5F9, was generated, and antibody humanization was carried out by grafting its complementarity determining regions (CDRs) onto a human IgG4 format. The resulting humanized 5F9 antibody (Hu5F9-G4) bound monomeric human CD47 with an 8 nM affinity. Hu5F9-G4 induced potent macrophage-mediated phagocytosis of primary human AML cells in vitro and completely eradicated human AML in vivo, leading to long-term disease-free survival of patient-derived xenografts. Moreover, Hu5F9-G4 synergized with rituximab to eliminate NHL engraftment and cure xenografted mice. Finally, toxicokinetic studies in non-human primates showed that Hu5F9-G4 could be safely administered intravenously at doses able to achieve potentially therapeutic serum levels. Thus, Hu5F9-G4 is actively being developed for and has been entered into clinical trials in patients with AML and solid tumors (ClinicalTrials.gov identifier: NCT02216409).
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MESH Headings
- Animals
- Antibodies, Monoclonal/immunology
- Antibodies, Monoclonal/pharmacokinetics
- Antibodies, Monoclonal/therapeutic use
- Antibodies, Monoclonal, Humanized/immunology
- Antibodies, Monoclonal, Humanized/pharmacokinetics
- Antibodies, Monoclonal, Humanized/therapeutic use
- Antibody Affinity
- Antineoplastic Agents/immunology
- Antineoplastic Agents/pharmacokinetics
- Antineoplastic Agents/therapeutic use
- CD47 Antigen/immunology
- Female
- Haplorhini
- Humans
- Leukemia, Myeloid, Acute/drug therapy
- Leukemia, Myeloid, Acute/immunology
- Leukemia, Myeloid, Acute/pathology
- Macaca fascicularis
- Mice
- Mice, Inbred BALB C
- Phagocytosis/drug effects
- Rituximab/therapeutic use
- Tumor Cells, Cultured
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Affiliation(s)
- Jie Liu
- Institute for Stem Cell Biology and Regenerative Medicine and the Ludwig Cancer Center, Stanford University School of Medicine, Stanford, California, United States of America
| | - Lijuan Wang
- Institute for Stem Cell Biology and Regenerative Medicine and the Ludwig Cancer Center, Stanford University School of Medicine, Stanford, California, United States of America
| | - Feifei Zhao
- Institute for Stem Cell Biology and Regenerative Medicine and the Ludwig Cancer Center, Stanford University School of Medicine, Stanford, California, United States of America
| | - Serena Tseng
- Institute for Stem Cell Biology and Regenerative Medicine and the Ludwig Cancer Center, Stanford University School of Medicine, Stanford, California, United States of America
| | - Cyndhavi Narayanan
- Institute for Stem Cell Biology and Regenerative Medicine and the Ludwig Cancer Center, Stanford University School of Medicine, Stanford, California, United States of America
| | - Lei Shura
- Institute for Stem Cell Biology and Regenerative Medicine and the Ludwig Cancer Center, Stanford University School of Medicine, Stanford, California, United States of America
| | - Stephen Willingham
- Institute for Stem Cell Biology and Regenerative Medicine and the Ludwig Cancer Center, Stanford University School of Medicine, Stanford, California, United States of America
| | - Maureen Howard
- Institute for Stem Cell Biology and Regenerative Medicine and the Ludwig Cancer Center, Stanford University School of Medicine, Stanford, California, United States of America
| | - Susan Prohaska
- Institute for Stem Cell Biology and Regenerative Medicine and the Ludwig Cancer Center, Stanford University School of Medicine, Stanford, California, United States of America
| | - Jens Volkmer
- Institute for Stem Cell Biology and Regenerative Medicine and the Ludwig Cancer Center, Stanford University School of Medicine, Stanford, California, United States of America
| | - Mark Chao
- Institute for Stem Cell Biology and Regenerative Medicine and the Ludwig Cancer Center, Stanford University School of Medicine, Stanford, California, United States of America
| | - Irving L. Weissman
- Institute for Stem Cell Biology and Regenerative Medicine and the Ludwig Cancer Center, Stanford University School of Medicine, Stanford, California, United States of America
- * E-mail: (ILW); (RM)
| | - Ravindra Majeti
- Institute for Stem Cell Biology and Regenerative Medicine and the Ludwig Cancer Center, Stanford University School of Medicine, Stanford, California, United States of America
- Department of Medicine, Division of Hematology, Stanford University School of Medicine, Stanford, California, United States of America
- * E-mail: (ILW); (RM)
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Brower V. American Association of Cancer Research Showcases Immunotherapy Advances. J Natl Cancer Inst 2015; 107:djv231. [PMID: 26243202 DOI: 10.1093/jnci/djv231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Beerli RR, Hell T, Merkel AS, Grawunder U. Sortase Enzyme-Mediated Generation of Site-Specifically Conjugated Antibody Drug Conjugates with High In Vitro and In Vivo Potency. PLoS One 2015; 10:e0131177. [PMID: 26132162 PMCID: PMC4488448 DOI: 10.1371/journal.pone.0131177] [Citation(s) in RCA: 150] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Accepted: 05/31/2015] [Indexed: 01/16/2023] Open
Abstract
Antibody drug conjugates (ADCs) have recently been proven to be highly potent anti-tumor drugs, typically exceeding the efficacy of conventional monoclonal antibodies (mAbs). ADCs are currently produced by chemical conjugation of a small-molecule toxin to the mAb through lysine or cysteine side chains. This leads to heterogeneous mixtures of ADCs in which variable numbers of drugs are conjugated to individual antibodies and in which the site of conjugation cannot be defined. Consequently, there is currently significant interest in further development of drug conjugation technologies, with a particular focus on site-specific payload conjugation. Here, we present an enzymatic conjugation platform based on the S. aureus sortase A-mediated transpeptidation reaction, allowing the efficient generation of ADCs with toxins conjugated to pre-defined sites at pre-defined drug-to-antibody ratios. For this, two modifications were introduced: first, immunoglobulin heavy (IgH) and light (IgL) chains were modified at their C-termini by addition of the sortase A recognition motif LPETG, and second, the small molecule tubulin polymerization inhibitors monomethylauristatin E (MMAE) and maytansine were modified by addition of a pentaglycine peptide, thus making them suitable substrates for sortase A-mediated transpeptidation. We demonstrate efficient generation and characterization of the anti-CD30 ADC Ac10-vcPAB-MMAE, an enzymatically conjugated counterpart of brentuximab vedotin (Adcetris), as well as several anti-HER-2 ADCs including trastuzumab-maytansine, the counterpart of trastuzumab emtansine (Kadcyla). ADCs generated in this manner were found to display in vitro cell killing activities indistinguishable from the classic conjugates. Further, when tested in vivo in a HER-2-overexpressing ovarian cancer xenograft mouse model, enzymatically generated trastuzumab-maytansine was found to lead to complete regression of established tumors, similar to Kadcyla.
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MESH Headings
- Ado-Trastuzumab Emtansine
- Aminoacyltransferases/chemistry
- Aminoacyltransferases/immunology
- Animals
- Antibodies, Monoclonal/chemistry
- Antibodies, Monoclonal/immunology
- Antibodies, Monoclonal/pharmacology
- Antibodies, Monoclonal, Humanized/chemistry
- Antibodies, Monoclonal, Humanized/immunology
- Antibodies, Monoclonal, Humanized/pharmacology
- Antineoplastic Agents/chemistry
- Antineoplastic Agents/immunology
- Antineoplastic Agents/pharmacology
- Bacterial Proteins/chemistry
- Bacterial Proteins/immunology
- Brentuximab Vedotin
- Cysteine Endopeptidases/chemistry
- Cysteine Endopeptidases/immunology
- Female
- Humans
- Immunoconjugates/chemistry
- Immunoconjugates/immunology
- Immunoconjugates/pharmacology
- Ki-1 Antigen/antagonists & inhibitors
- Ki-1 Antigen/genetics
- Ki-1 Antigen/immunology
- Maytansine/analogs & derivatives
- Maytansine/chemistry
- Maytansine/immunology
- Maytansine/pharmacology
- Mice
- Mice, Nude
- Oligopeptides/chemistry
- Oligopeptides/immunology
- Ovarian Neoplasms/drug therapy
- Ovarian Neoplasms/immunology
- Ovarian Neoplasms/pathology
- Protein Engineering
- Receptor, ErbB-2/antagonists & inhibitors
- Receptor, ErbB-2/genetics
- Receptor, ErbB-2/immunology
- Staphylococcus aureus/chemistry
- Staphylococcus aureus/enzymology
- Trastuzumab
- Xenograft Model Antitumor Assays
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Affiliation(s)
- Roger R. Beerli
- NBE-Therapeutics AG, Hochbergerstrasse, Basel, Switzerland
- * E-mail:
| | - Tamara Hell
- NBE-Therapeutics AG, Hochbergerstrasse, Basel, Switzerland
| | - Anna S. Merkel
- NBE-Therapeutics AG, Hochbergerstrasse, Basel, Switzerland
| | - Ulf Grawunder
- NBE-Therapeutics AG, Hochbergerstrasse, Basel, Switzerland
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65
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Abstract
UNLABELLED Traditional treatment modalities for advanced cancer (radiotherapy, chemotherapy, or targeted agents) act directly on tumors to inhibit or destroy them. Along with surgery, these modalities are predominantly palliative, with toxicity and only modest improvements in survival in patients with advanced solid tumors. Accordingly, long-term survival rates for most patients with advanced cancer remain low, thus there is a need for cancer treatments with favorable benefit and toxicity profiles that can potentially result in long-term survival. The immune system plays a critical role in the recognition and eradication of tumor cells ("immune surveillance"), and immunotherapies based on this concept have been used for decades with some success against a few tumor types; however, most immunotherapies were limited by a lack of either substantial efficacy or specificity, resulting in toxicity. We now have a greater understanding of the complex interactions between the immune system and tumors and have identified key molecules that govern these interactions. This information has revitalized the interest in immunotherapy as an evolving treatment modality using immunotherapeutics designed to overcome the mechanisms exploited by tumors to evade immune destruction. Immunotherapies have potentially complementary mechanisms of action that may allow them to be combined with other immunotherapeutics, chemotherapy, targeted therapy, or other traditional therapies. This review discusses the concepts and data behind immunotherapies, with a focus on the checkpoint inhibitors and their responses, toxicities, and potential for long-term survival, and explores promising single-agent and combination therapies in development. IMPLICATIONS FOR PRACTICE Immunotherapy is an evolving treatment approach based on the role of the immune system in eradicating cancer. An example of an immunotherapeutic is ipilimumab, an antibody that blocks cytotoxic T-lymphocyte antigen-4 (CTLA-4) to augment antitumor immune responses. Ipilimumab is approved for advanced melanoma and induced long-term survival in a proportion of patients. The programmed death-1 (PD-1) checkpoint inhibitors are promising immunotherapies with demonstrated sustained antitumor responses in several tumors. Because they harness the patient's own immune system, immunotherapies have the potential to be a powerful weapon against cancer.
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Affiliation(s)
- Gregory K Pennock
- Levine Cancer Institute, Charlotte, North Carolina, USA; University of Washington, Seattle, Washington, USA
| | - Laura Q M Chow
- Levine Cancer Institute, Charlotte, North Carolina, USA; University of Washington, Seattle, Washington, USA
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66
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Kanwar JR, Roy K, Patel Y, Zhou SF, Singh MR, Singh D, Nasir M, Sehgal R, Sehgal A, Singh RS, Garg S, Kanwar RK. Multifunctional iron bound lactoferrin and nanomedicinal approaches to enhance its bioactive functions. Molecules 2015; 20:9703-31. [PMID: 26016555 PMCID: PMC6272382 DOI: 10.3390/molecules20069703] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Accepted: 05/13/2015] [Indexed: 02/08/2023] Open
Abstract
Lactoferrin (Lf), an iron-binding protein from the transferrin family has been reported to have numerous functions. Even though Lf was first isolated from milk, it is also found in most exocrine secretions and in the secondary granules of neutrophils. Antimicrobial and anti-inflammatory activity reports on lactoferrin identified its significance in host defense against infection and extreme inflammation. Anticarcinogenic reports on lactoferrin make this protein even more valuable. This review is focused on the structural configuration of iron-containing and iron-free forms of lactoferrin obtained from different sources such as goat, camel and bovine. Apart for emphasizing on the specific beneficial properties of lactoferrin from each of these sources, the general antimicrobial, immunomodulatory and anticancer activities of lactoferrin are discussed here. Implementation of nanomedicinial strategies that enhance the bioactive function of lactoferrin are also discussed, along with information on lactoferrin in clinical trials.
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Affiliation(s)
- Jagat R Kanwar
- Nanomedicine-Laboratory of Immunology and Molecular Biomedical Research (NLIMBR), School of Medicine (SoM), Molecular and Medical Research (MMR) Strategic Research Centre, Faculty of Health, Deakin University, Waurn Ponds, Victoria 3217, Australia.
| | - Kislay Roy
- Nanomedicine-Laboratory of Immunology and Molecular Biomedical Research (NLIMBR), School of Medicine (SoM), Molecular and Medical Research (MMR) Strategic Research Centre, Faculty of Health, Deakin University, Waurn Ponds, Victoria 3217, Australia.
| | - Yogesh Patel
- Nanomedicine-Laboratory of Immunology and Molecular Biomedical Research (NLIMBR), School of Medicine (SoM), Molecular and Medical Research (MMR) Strategic Research Centre, Faculty of Health, Deakin University, Waurn Ponds, Victoria 3217, Australia.
| | - Shu-Feng Zhou
- Department of Pharmaceutical Sciences, College of Pharmacy, University of South Florida, Tampa, FL 33612, USA.
| | - Manju Rawat Singh
- University Institute of Pharmacy, Pt. Ravishankar Shukla University, Raipur 492 010, India.
| | - Deependra Singh
- University Institute of Pharmacy, Pt. Ravishankar Shukla University, Raipur 492 010, India.
| | - Muhammad Nasir
- Department of Food Science & Human Nutrition, Faculty of Bio-Sciences, University of Veterinary & Animal Sciences, Lahore, Punjab 54000, Pakistan.
| | - Rakesh Sehgal
- Department of Medical Parasitology, Postgraduate Institute of Medical Education & Research, Chandigarh 160012, India.
| | - Alka Sehgal
- Department of Obstetrics & Gynecology, Government Medical College & Hospital, Sector 32, Chandigarh 160031, India.
| | - Ram Sarup Singh
- Carbohydrate and Protein Biotechnology Laboratory, Department of Biotechnology, Punjabi University, Patiala 147002, India.
| | - Sanjay Garg
- Centre for Pharmaceutical Innovation and Development (CPID), School of Pharmacy and Medical Sciences, University of South Australia, Adelaide SA 5000, Australia.
| | - Rupinder K Kanwar
- Nanomedicine-Laboratory of Immunology and Molecular Biomedical Research (NLIMBR), School of Medicine (SoM), Molecular and Medical Research (MMR) Strategic Research Centre, Faculty of Health, Deakin University, Waurn Ponds, Victoria 3217, Australia.
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67
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Vinther AG, Claësson MH. [The influence of melatonin on the immune system and cancer]. Ugeskr Laeger 2015; 177:V10140568. [PMID: 26027592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Melatonin has been shown to play a fundamental part in neuroimmunomodulation. Besides regulating the circadian rhythm it works as a natural antioxidant with immune stimulatory and anti-cancer properties. Melatonin is a regulator of haemopoiesis and modifies various cells and cytokines of the immune system. Also, melatonin elicits oncostatic properties in a variety of different tumour cell lines. A number of studies have documented that when given in combination with chemo-therapy to patients with disseminated disease, melatonin increases the overall one-year survival and reduces toxic side effects.
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68
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Shalapour S, Font-Burgada J, Di Caro G, Zhong Z, Sanchez-Lopez E, Dhar D, Willimsky G, Ammirante M, Strasner A, Hansel DE, Jamieson C, Kane CJ, Klatte T, Birner P, Kenner L, Karin M. Immunosuppressive plasma cells impede T-cell-dependent immunogenic chemotherapy. Nature 2015; 521:94-8. [PMID: 25924065 PMCID: PMC4501632 DOI: 10.1038/nature14395] [Citation(s) in RCA: 392] [Impact Index Per Article: 43.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Accepted: 03/09/2015] [Indexed: 12/14/2022]
Abstract
Cancer-associated genetic alterations induce expression of tumour antigens that can activate CD8(+) cytotoxic T cells (CTLs), but the microenvironment of established tumours promotes immune tolerance through poorly understood mechanisms. Recently developed therapeutics that overcome tolerogenic mechanisms activate tumour-directed CTLs and are effective in some human cancers. Immune mechanisms also affect treatment outcome, and certain chemotherapeutic drugs stimulate cancer-specific immune responses by inducing immunogenic cell death and other effector mechanisms. Our previous studies revealed that B cells recruited by the chemokine CXCL13 into prostate cancer tumours promote the progression of castrate-resistant prostate cancer by producing lymphotoxin, which activates an IκB kinase α (IKKα)-BMI1 module in prostate cancer stem cells. Because castrate-resistant prostate cancer is refractory to most therapies, we examined B cell involvement in the acquisition of chemotherapy resistance. Here we focus on oxaliplatin, an immunogenic chemotherapeutic agent that is effective in aggressive prostate cancer. We show that mouse B cells modulate the response to low-dose oxaliplatin, which promotes tumour-directed CTL activation by inducing immunogenic cell death. Three different mouse prostate cancer models were refractory to oxaliplatin unless genetically or pharmacologically depleted of B cells. The crucial immunosuppressive B cells are plasmocytes that express IgA, interleukin (IL)-10 and programmed death ligand 1 (PD-L1), the appearance of which depends on TGFβ receptor signalling. Elimination of these cells, which also infiltrate human-therapy-resistant prostate cancer, allows CTL-dependent eradication of oxaliplatin-treated tumours.
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Affiliation(s)
- Shabnam Shalapour
- 1] Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology, School of Medicine, University of California San Diego (UCSD), 9500 Gilman Drive, San Diego, California 92093, USA [2] Department of Pathology, School of Medicine, University of California San Diego, 9500 Gilman Drive, San Diego, California 92093, USA
| | - Joan Font-Burgada
- 1] Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology, School of Medicine, University of California San Diego (UCSD), 9500 Gilman Drive, San Diego, California 92093, USA [2] Department of Pathology, School of Medicine, University of California San Diego, 9500 Gilman Drive, San Diego, California 92093, USA
| | - Giuseppe Di Caro
- 1] Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology, School of Medicine, University of California San Diego (UCSD), 9500 Gilman Drive, San Diego, California 92093, USA [2] Department of Pathology, School of Medicine, University of California San Diego, 9500 Gilman Drive, San Diego, California 92093, USA
| | - Zhenyu Zhong
- 1] Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology, School of Medicine, University of California San Diego (UCSD), 9500 Gilman Drive, San Diego, California 92093, USA [2] Department of Pathology, School of Medicine, University of California San Diego, 9500 Gilman Drive, San Diego, California 92093, USA
| | - Elsa Sanchez-Lopez
- 1] Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology, School of Medicine, University of California San Diego (UCSD), 9500 Gilman Drive, San Diego, California 92093, USA [2] Department of Pathology, School of Medicine, University of California San Diego, 9500 Gilman Drive, San Diego, California 92093, USA
| | - Debanjan Dhar
- 1] Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology, School of Medicine, University of California San Diego (UCSD), 9500 Gilman Drive, San Diego, California 92093, USA [2] Department of Pathology, School of Medicine, University of California San Diego, 9500 Gilman Drive, San Diego, California 92093, USA
| | - Gerald Willimsky
- Institute of Immunology, Charité Campus Buch, 13125 Berlin, Germany
| | - Massimo Ammirante
- 1] Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology, School of Medicine, University of California San Diego (UCSD), 9500 Gilman Drive, San Diego, California 92093, USA [2] Department of Pathology, School of Medicine, University of California San Diego, 9500 Gilman Drive, San Diego, California 92093, USA
| | - Amy Strasner
- 1] Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology, School of Medicine, University of California San Diego (UCSD), 9500 Gilman Drive, San Diego, California 92093, USA [2] Department of Pathology, School of Medicine, University of California San Diego, 9500 Gilman Drive, San Diego, California 92093, USA
| | - Donna E Hansel
- Department of Pathology, School of Medicine, University of California San Diego, 9500 Gilman Drive, San Diego, California 92093, USA
| | - Christina Jamieson
- Department of Surgery, Urology Division, University of California San Diego, 3855 Health Sciences Drive, San Diego, California 92093, USA
| | - Christopher J Kane
- Department of Surgery, Urology Division, University of California San Diego, 3855 Health Sciences Drive, San Diego, California 92093, USA
| | - Tobias Klatte
- Department of Urology, Medical University of Vienna, 1090 Vienna, Austria
| | - Peter Birner
- Department of Pathology, Medical University of Vienna, 1090 Vienna, Austria
| | - Lukas Kenner
- 1] Department of Pathology, Medical University of Vienna, 1090 Vienna, Austria [2] Clinical Institute of Pathology, Ludwig Boltzmann Institute for Cancer Research, Medical University of Vienna, Unit of Pathology of Laboratory Animals (UPLA), University of Veterinary Medicine Vienna, 1210 Vienna, Austria
| | - Michael Karin
- 1] Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology, School of Medicine, University of California San Diego (UCSD), 9500 Gilman Drive, San Diego, California 92093, USA [2] Department of Pathology, School of Medicine, University of California San Diego, 9500 Gilman Drive, San Diego, California 92093, USA
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MESH Headings
- Antibodies, Bispecific/immunology
- Antibodies, Bispecific/therapeutic use
- Antigens, CD19/drug effects
- Antigens, CD19/immunology
- Antineoplastic Agents/immunology
- Antineoplastic Agents/therapeutic use
- Gene Transfer Techniques
- Hematologic Neoplasms/immunology
- Hematologic Neoplasms/therapy
- Humans
- Immunotherapy/methods
- Leukemia, Lymphocytic, Chronic, B-Cell/immunology
- Leukemia, Lymphocytic, Chronic, B-Cell/therapy
- Lymphoma/immunology
- Lymphoma/therapy
- Lymphoma, Large B-Cell, Diffuse/immunology
- Lymphoma, Large B-Cell, Diffuse/therapy
- Lymphoma, Non-Hodgkin/immunology
- Lymphoma, Non-Hodgkin/therapy
- Orphan Drug Production
- Precursor Cell Lymphoblastic Leukemia-Lymphoma/immunology
- Precursor Cell Lymphoblastic Leukemia-Lymphoma/therapy
- Receptors, Antigen, T-Cell/immunology
- Receptors, Antigen, T-Cell/therapeutic use
- Recombinant Fusion Proteins/therapeutic use
- United States
- United States Food and Drug Administration
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70
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Gao W, Tang Z, Zhang Y, Feng M, Qian M, Dimitrov DS, Ho M. Immunotoxin targeting glypican-3 regresses liver cancer via dual inhibition of Wnt signalling and protein synthesis. Nat Commun 2015; 6:6536. [PMID: 25758784 PMCID: PMC4357278 DOI: 10.1038/ncomms7536] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Accepted: 02/05/2015] [Indexed: 12/14/2022] Open
Abstract
Glypican-3 is a cell surface glycoprotein that associates with Wnt in liver cancer. We develop two antibodies targeting glypican-3, HN3 and YP7. The first antibody recognizes a functional epitope and inhibits Wnt signalling, whereas the second antibody recognizes a C-terminal epitope but does not inhibit Wnt signalling. Both are fused to a fragment of Pseudomonas exotoxin A (PE38) to create immunotoxins. Interestingly, the immunotoxin based on HN3 (HN3-PE38) has superior antitumor activity as compared with YP7 (YP7-PE38) both in vitro and in vivo. Intravenous administration of HN3-PE38 alone, or in combination with chemotherapy, induces regression of Hep3B and HepG2 liver tumour xenografts in mice. This study establishes glypican-3 as a promising candidate for immunotoxin-based liver cancer therapy. Our results demonstrate immunotoxin-induced tumour regression via dual mechanisms: inactivation of cancer signalling via the antibody and inhibition of protein synthesis via the toxin.
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Affiliation(s)
- Wei Gao
- Antibody Therapy Section, Laboratory of Molecular Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Zhewei Tang
- Antibody Therapy Section, Laboratory of Molecular Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
- Institute of Biomedical Sciences, School of Life Sciences, East China Normal University, Shanghai 200062, China
| | - Yifan Zhang
- Antibody Therapy Section, Laboratory of Molecular Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Mingqian Feng
- Antibody Therapy Section, Laboratory of Molecular Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Min Qian
- Institute of Biomedical Sciences, School of Life Sciences, East China Normal University, Shanghai 200062, China
| | - Dimiter S. Dimitrov
- Protein Interaction Group, Laboratory of Experimental Immunology, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, USA
| | - Mitchell Ho
- Antibody Therapy Section, Laboratory of Molecular Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
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71
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Stakheeva MN, Kzhyshkowska YG, Buldakov MA, Cherdyntseva NV. [Mechanisms of immune system contribution to efficiency of antitumor cytostatic therapy]. Vopr Onkol 2015; 61:546-555. [PMID: 26571821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Increasing the efficiency of antitumor therapy is one of major relevant tasks of oncology today. During recent years experimental evidence for active involvement of immune system in the regulation antitumor effects of cytostatic thereby has been obtained and theoretically justified. It was demonstrated that efficient cytostatic treatment is related to the cytotoxic activities of immune cells targeted against tumor cells. Such cytotoxic activities of immune cells are induced by radiotherapy or chemotherapy, where both innate and adaptive immune mechanisms are involved. However the disturbance in the functions of immune system can result in the impaired efficiency of cytostatic anti-tumor therapy. Cytotoxic agents can affect immune reactions by increasing the antigenic properties of tumor cells, facilitating their recognition of immune system, by stimulation of functional activation effector immune cells, elimination of immunosuppressive factors as well as systemic effects of antitumor therapy. A consideration of the crucial role of immune system in the providing of the efficiency of cytostatic antitumor therapy develops novel therapeutic approaches for treatment of malignant disorders based on balanced synergistic action of cytostatic agents and innovative immunomodulatory approaches.
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72
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Sokolova EA, Zdobnova TA, Stremovskiy OA, Balalaeva IV, Deyev SM. Novel recombinant anti-HER2/neu immunotoxin: design and antitumor efficiency. Biochemistry (Mosc) 2014; 79:1376-81. [PMID: 25716732 DOI: 10.1134/s0006297914120128] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The novel HER2/neu-specific recombinant immunotoxin 4D5scFv-PE40 consisting of 4D5scFv antibody (targeting module) and Pseudomonas exotoxin A fragment (effector module) combined in a single polypeptide chain via a flexible linker has been expressed and purified. This immunotoxin conserves specificity and affinity that are characteristics of the parental antibody 4D5scFv and exhibits selective and strong cytotoxic effect against cancer cells overexpressing HER2/neu receptor. The results of the experiments both in vitro (in cell cultures) and in vivo (in tumor-bearing animals) demonstrate high potential of 4D5scFv-PE40 for targeted therapy of tumors overexpressing HER2/neu.
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Affiliation(s)
- E A Sokolova
- Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, 603950, Russia.
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73
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D’Souza JW, Reddy S, Goldsmith LE, Shchaveleva I, Marks JD, Litwin S, Robinson MK. Combining anti-ERBB3 antibodies specific for domain I and domain III enhances the anti-tumor activity over the individual monoclonal antibodies. PLoS One 2014; 9:e112376. [PMID: 25386657 PMCID: PMC4227695 DOI: 10.1371/journal.pone.0112376] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Accepted: 10/15/2014] [Indexed: 01/19/2023] Open
Abstract
Background Inappropriate signaling through the epidermal growth factor receptor family (EGFR1/ERBB1, ERBB2/HER2, ERBB3/HER3, and ERBB4/HER4) of receptor tyrosine kinases leads to unregulated activation of multiple downstream signaling pathways that are linked to cancer formation and progression. In particular, ERBB3 plays a critical role in linking ERBB signaling to the phosphoinositide 3-kinase and Akt signaling pathway and increased levels of ERBB3-dependent signaling is also increasingly recognized as a mechanism for acquired resistance to ERBB-targeted therapies. Methods We had previously reported the isolation of a panel of anti-ERBB3 single-chain Fv antibodies through use of phage-display technology. In the current study scFv specific for domain I (F4) and domain III (A5) were converted into human IgG1 formats and analyzed for efficacy. Results Treatment of cells with an oligoclonal mixture of the A5/F4 IgGs appeared more effective at blocking both ligand-induced and ligand-independent signaling through ERBB3 than either single IgG alone. This correlated with improved ability to inhibit the cell growth both as a single agent and in combination with other ERBB-targeted therapies. Treatment of NCI-N87 tumor xenografts with the A5/F4 oligoclonal led to a statistically significant decrease in tumor growth rate that was further enhanced in combination with trastuzumab. Conclusion These results suggest that an oligoclonal antibody mixture may be a more effective approach to downregulate ERBB3-dependent signaling.
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Affiliation(s)
- Jimson W. D’Souza
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, United States of America
| | - Smitha Reddy
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, United States of America
| | - Lisa E. Goldsmith
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, United States of America
| | - Irina Shchaveleva
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, United States of America
| | - James D. Marks
- Department of Anesthesia and Pharmaceutical Chemistry, University of California San Francisco, San Francisco, California, United States of America
| | - Samuel Litwin
- Biostatistics and Bioinformatics Facility, Fox Chase Cancer Center, Philadelphia, PA, United States of America
| | - Matthew K. Robinson
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, United States of America
- * E-mail:
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74
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Abstract
Studies on the biologic and molecular genetic underpinnings of multiple myeloma (MM) have identified the pleiotropic, pro-inflammatory cytokine, interleukin-6 (IL-6), as a factor crucial to the growth, proliferation and survival of myeloma cells. IL-6 is also a potent stimulator of osteoclastogenesis and a sculptor of the tumor microenvironment in the bone marrow of patients with myeloma. This knowledge has engendered considerable interest in targeting IL-6 for therapeutic purposes, using a variety of antibody- and small-molecule-based therapies. However, despite the early recognition of the importance of IL-6 for myeloma and the steady progress in our knowledge of IL-6 in normal and malignant development of plasma cells, additional efforts will be required to translate the promise of IL-6 as a target for new myeloma therapies into significant clinical benefits for patients with myeloma. This review summarizes published research on the role of IL-6 in myeloma development and describes ongoing efforts by the University of Iowa Myeloma Multidisciplinary Oncology Group to develop new approaches to the design and testing of IL-6-targeted therapies and preventions of MM.
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Affiliation(s)
- Timothy R Rosean
- Interdisciplinary Graduate Program in Immunology, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
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75
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Fu W, Wang Y, Zhang Y, Xiong L, Takeda H, Ding L, Xu Q, He L, Tan W, Bethune AN, Zhou L. Insights into HER2 signaling from step-by-step optimization of anti-HER2 antibodies. MAbs 2014; 6:978-90. [PMID: 24838231 PMCID: PMC4171031 DOI: 10.4161/mabs.28786] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2014] [Revised: 04/03/2014] [Accepted: 04/04/2014] [Indexed: 02/04/2023] Open
Abstract
HER2, a ligand-free tyrosine kinase receptor of the HER family, is frequently overexpressed in breast cancer. The anti-HER2 antibody trastuzumab has shown significant clinical benefits in metastatic breast cancer; however, resistance to trastuzumab is common. The development of monoclonal antibodies that have complementary mechanisms of action results in a more comprehensive blockade of ErbB2 signaling, especially HER2/HER3 signaling. Use of such antibodies may have clinical benefits if these antibodies can become widely accepted. Here, we describe a novel anti-HER2 antibody, hHERmAb-F0178C1, which was isolated from a screen of a phage display library. A step-by-step optimization method was employed to maximize the inhibitory effect of this anti-HER2 antibody. Crystallographic analysis was used to determine the three-dimensional structure to 3.5 Å resolution, confirming that the epitope of this antibody is in domain III of HER2. Moreover, this novel anti-HER2 antibody exhibits superior efficacy in blocking HER2/HER3 heterodimerization and signaling, and its use in combination with pertuzumab has a synergistic effect. Characterization of this antibody revealed the important role of a ligand binding site within domain III of HER2. The results of this study clearly indicate the unique potential of hHERmAb-F0178C1, and its complementary inhibition effect on HER2/HER3 signaling warrants its consideration as a promising clinical treatment.
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MESH Headings
- Animals
- Antibodies, Monoclonal, Humanized/genetics
- Antibodies, Monoclonal, Humanized/immunology
- Antibodies, Monoclonal, Humanized/pharmacology
- Antibodies, Neoplasm/genetics
- Antibodies, Neoplasm/immunology
- Antibodies, Neoplasm/pharmacology
- Antineoplastic Agents/immunology
- Antineoplastic Agents/pharmacology
- Breast Neoplasms/drug therapy
- Breast Neoplasms/immunology
- Breast Neoplasms/pathology
- Cell Line, Tumor
- Female
- Humans
- Mice
- Mice, Inbred BALB C
- Mice, Nude
- Protein Engineering/methods
- Receptor, ErbB-2/antagonists & inhibitors
- Receptor, ErbB-2/immunology
- Receptor, ErbB-3/immunology
- Signal Transduction/drug effects
- Signal Transduction/immunology
- Trastuzumab
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Affiliation(s)
- Wenyan Fu
- Central Laboratory; Navy General Hospital; Beijing, PR China
- Cancer Center; PLA General Hospital; PLA Postgraduate School of Medicine; Beijing, PR China
| | - Yuxiao Wang
- Central Laboratory; Navy General Hospital; Beijing, PR China
| | - Yunshan Zhang
- Department of Ultrasound in Medicine; Navy General Hospital; Beijing, PR China
| | - Lijuan Xiong
- Central Laboratory; Navy General Hospital; Beijing, PR China
| | - Hiroaki Takeda
- Department of Biochemistry; Norman Institute for Cancer Research; Toronto, ON CA
| | - Li Ding
- Central Laboratory; Navy General Hospital; Beijing, PR China
| | - Qunfang Xu
- The Department of Laboratory Medicine; State Grid Beijing Electric Power Hospital; Beijing, PR China
| | - Lidong He
- Central Laboratory; Navy General Hospital; Beijing, PR China
| | - Wenlong Tan
- Beijing Institute of Radiation Medicine; Beijing, PR China
| | - Augus N. Bethune
- Department of Molecular Oncology; Norman Institute for Cancer Research; Toronto, ON CA
| | - Lijun Zhou
- Central Laboratory; Navy General Hospital; Beijing, PR China
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76
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Tomić S, Đokić J, Vasilijić S, Ogrinc N, Rudolf R, Pelicon P, Vučević D, Milosavljević P, Janković S, Anžel I, Rajković J, Rupnik MS, Friedrich B, Čolić M. Size-dependent effects of gold nanoparticles uptake on maturation and antitumor functions of human dendritic cells in vitro. PLoS One 2014; 9:e96584. [PMID: 24802102 PMCID: PMC4011871 DOI: 10.1371/journal.pone.0096584] [Citation(s) in RCA: 84] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Accepted: 04/08/2014] [Indexed: 12/23/2022] Open
Abstract
Gold nanoparticles (GNPs) are claimed as outstanding biomedical tools for cancer diagnostics and photo-thermal therapy, but without enough evidence on their potentially adverse immunological effects. Using a model of human dendritic cells (DCs), we showed that 10 nm- and 50 nm-sized GNPs (GNP10 and GNP50, respectively) were internalized predominantly via dynamin-dependent mechanisms, and they both impaired LPS-induced maturation and allostimulatory capacity of DCs, although the effect of GNP10 was more prominent. However, GNP10 inhibited LPS-induced production of IL-12p70 by DCs, and potentiated their Th2 polarization capacity, while GNP50 promoted Th17 polarization. Such effects of GNP10 correlated with a stronger inhibition of LPS-induced changes in Ca2+ oscillations, their higher number per DC, and more frequent extra-endosomal localization, as judged by live-cell imaging, proton, and electron microscopy, respectively. Even when released from heat-killed necrotic HEp-2 cells, GNP10 inhibited the necrotic tumor cell-induced maturation and functions of DCs, potentiated their Th2/Th17 polarization capacity, and thus, impaired the DCs' capacity to induce T cell-mediated anti-tumor cytotoxicity in vitro. Therefore, GNP10 could potentially induce more adverse DC-mediated immunological effects, compared to GNP50.
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Affiliation(s)
- Sergej Tomić
- Medical Faculty of the Military Medical Academy, University of Defense, Belgrade, Serbia
- Institute for Medical Research of the Military Medical Academy, University of Defense, Belgrade, Serbia
| | - Jelena Đokić
- Medical Faculty of the Military Medical Academy, University of Defense, Belgrade, Serbia
| | - Saša Vasilijić
- Medical Faculty of the Military Medical Academy, University of Defense, Belgrade, Serbia
- Institute for Medical Research of the Military Medical Academy, University of Defense, Belgrade, Serbia
| | - Nina Ogrinc
- Microanalytical Center, Jožef Stefan Institute, Ljubljana, Slovenia
- LOTRIČ Metrology, Selca, Slovenia
| | - Rebeka Rudolf
- Faculty of Mechanical Engineering, University of Maribor, Maribor, Slovenia
- Zlatarna Celje d.d., Celje, Slovenia
| | - Primož Pelicon
- Microanalytical Center, Jožef Stefan Institute, Ljubljana, Slovenia
| | - Dragana Vučević
- Medical Faculty of the Military Medical Academy, University of Defense, Belgrade, Serbia
- Institute for Medical Research of the Military Medical Academy, University of Defense, Belgrade, Serbia
| | - Petar Milosavljević
- Institute for Medical Research of the Military Medical Academy, University of Defense, Belgrade, Serbia
| | | | - Ivan Anžel
- Faculty of Mechanical Engineering, University of Maribor, Maribor, Slovenia
| | | | | | - Bernd Friedrich
- Department of Process Metallurgy and Metal Recycling, Rheinisch-Westfälische Technische Hochschule, Aachen University, Aachen, Germany
| | - Miodrag Čolić
- Medical Faculty of the Military Medical Academy, University of Defense, Belgrade, Serbia
- Medical Faculty, University of Niš, Niš, Serbia
- * E-mail:
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77
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Dangi-Garimella S. Nivolumab provides favorable results in patients with advanced melanoma. Am J Manag Care 2014; 20:E11. [PMID: 25618626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
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78
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Zimmerman MP, Mehr SR. Targeted programmed cell death in lung cancer treatment. Am J Manag Care 2014; 20:E3. [PMID: 25618630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
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79
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Bauman JE, Ferris RL. Integrating novel therapeutic monoclonal antibodies into the management of head and neck cancer. Cancer 2014; 120:624-32. [PMID: 24222079 PMCID: PMC4095869 DOI: 10.1002/cncr.28380] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Revised: 08/21/2013] [Accepted: 08/23/2013] [Indexed: 12/12/2022]
Abstract
Head and neck squamous cell carcinoma (HNSCC) is an immunosuppressive malignancy. Interest in developing novel immunotherapies in HNSCC has been reawakened by the success of cetuximab, a therapeutic monoclonal antibody (mAb) against the epidermal growth factor receptor, which likely relies on immune as well as antisignaling mechanisms. This review focuses on novel therapeutic mAbs in current clinical development against established mechanisms of immune evasion in HNSCC, targeting: 1) tumor antigens, with resultant potential to induce antibody-dependent cell-mediated cytotoxicity and T cell activation; 2) immunosuppressive cytokines; 3) costimulatory tumor necrosis factor-family receptors; and 4) coinhibitory immune checkpoint receptors. Clinical trials of immunotherapeutic mAbs as monotherapy, in combination with cytolytic standard therapies exposing tumor antigens or in combination with other immunomodulatory mAbs, are urgently needed in HNSCC.
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MESH Headings
- Antibodies, Monoclonal/immunology
- Antibodies, Monoclonal/pharmacology
- Antibodies, Monoclonal/therapeutic use
- Antibodies, Monoclonal, Humanized/immunology
- Antibodies, Monoclonal, Humanized/therapeutic use
- Antibody-Dependent Cell Cytotoxicity/drug effects
- Antibody-Dependent Cell Cytotoxicity/immunology
- Antigens, Neoplasm/drug effects
- Antineoplastic Agents/immunology
- Antineoplastic Agents/pharmacology
- Antineoplastic Agents/therapeutic use
- Carcinoma, Squamous Cell/drug therapy
- Carcinoma, Squamous Cell/immunology
- Cetuximab
- Cytokines/antagonists & inhibitors
- Head and Neck Neoplasms/drug therapy
- Head and Neck Neoplasms/immunology
- Humans
- Immunoglobulin G/drug effects
- Immunotherapy/methods
- Receptors, Tumor Necrosis Factor/antagonists & inhibitors
- Squamous Cell Carcinoma of Head and Neck
- T-Lymphocytes, Cytotoxic/drug effects
- T-Lymphocytes, Cytotoxic/immunology
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Affiliation(s)
- Julie E Bauman
- Department of Internal Medicine (Division of Hematology/Oncology), University of Pittsburgh Cancer Institute, Pittsburgh, Pennsylvania
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80
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Jin B, Yeo AET. Editorial: Cancer immunotherapy: does an increasing arsenal of tools point to more fruitful avenues for research? Anticancer Agents Med Chem 2014; 14:181-2. [PMID: 24237216 DOI: 10.2174/18715206113136660379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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81
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Lehmann D, Spanholtz J, Sturtzel C, Tordoir M, Schlechta B, Groenewegen D, Hofer E. IL-12 directs further maturation of ex vivo differentiated NK cells with improved therapeutic potential. PLoS One 2014; 9:e87131. [PMID: 24498025 PMCID: PMC3909052 DOI: 10.1371/journal.pone.0087131] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Accepted: 12/18/2013] [Indexed: 11/18/2022] Open
Abstract
The possibility to modulate ex vivo human NK cell differentiation towards specific phenotypes will contribute to a better understanding of NK cell differentiation and facilitate tailored production of NK cells for immunotherapy. In this study, we show that addition of a specific low dose of IL-12 to an ex vivo NK cell differentiation system from cord blood CD34(+) stem cells will result in significantly increased proportions of cells with expression of CD62L as well as KIRs and CD16 which are preferentially expressed on mature CD56(dim) peripheral blood NK cells. In addition, the cells displayed decreased expression of receptors such as CCR6 and CXCR3, which are typically expressed to a lower extent by CD56(dim) than CD56(bright) peripheral blood NK cells. The increased number of CD62L and KIR positive cells prevailed in a population of CD33(+)NKG2A(+) NK cells, supporting that maturation occurs via this subtype. Among a series of transcription factors tested we found Gata3 and TOX to be significantly downregulated, whereas ID3 was upregulated in the IL-12-modulated ex vivo NK cells, implicating these factors in the observed changes. Importantly, the cells differentiated in the presence of IL-12 showed enhanced cytokine production and cytolytic activity against MHC class I negative and positive targets. Moreover, in line with the enhanced CD16 expression, these cells exhibited improved antibody-dependent cellular cytotoxicity for B-cell leukemia target cells in the presence of the clinically applied antibody rituximab. Altogether, these data provide evidence that IL-12 directs human ex vivo NK cell differentiation towards more mature NK cells with improved properties for potential cancer therapies.
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MESH Headings
- Antibodies, Monoclonal, Murine-Derived/immunology
- Antibodies, Monoclonal, Murine-Derived/pharmacology
- Antibody-Dependent Cell Cytotoxicity/drug effects
- Antibody-Dependent Cell Cytotoxicity/immunology
- Antigens, CD34/immunology
- Antigens, CD34/metabolism
- Antineoplastic Agents/immunology
- Antineoplastic Agents/pharmacology
- Cell Differentiation/drug effects
- Cell Differentiation/genetics
- Cell Differentiation/immunology
- Cell Line, Tumor
- Cells, Cultured
- Dose-Response Relationship, Drug
- Fetal Blood/cytology
- Fetal Blood/immunology
- Fetal Blood/metabolism
- Flow Cytometry
- GATA3 Transcription Factor/genetics
- GATA3 Transcription Factor/immunology
- Hematopoietic Stem Cells/drug effects
- Hematopoietic Stem Cells/immunology
- Hematopoietic Stem Cells/metabolism
- High Mobility Group Proteins/genetics
- High Mobility Group Proteins/immunology
- Humans
- Immunotherapy, Adoptive/methods
- Inhibitor of Differentiation Proteins/genetics
- Inhibitor of Differentiation Proteins/immunology
- Interleukin-2/immunology
- Interleukin-2/pharmacology
- K562 Cells
- Killer Cells, Natural/drug effects
- Killer Cells, Natural/immunology
- Killer Cells, Natural/metabolism
- L-Selectin/immunology
- L-Selectin/metabolism
- Neoplasm Proteins/genetics
- Neoplasm Proteins/immunology
- Receptors, CCR6/immunology
- Receptors, CCR6/metabolism
- Receptors, CXCR3/immunology
- Receptors, CXCR3/metabolism
- Receptors, IgG/immunology
- Receptors, IgG/metabolism
- Receptors, KIR/immunology
- Receptors, KIR/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Rituximab
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Affiliation(s)
- Dorit Lehmann
- Department of Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Jan Spanholtz
- Glycostem Therapeutics, s-Hertogenbosch, Nijmegen, The Netherlands
| | - Caterina Sturtzel
- Department of Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Marleen Tordoir
- Glycostem Therapeutics, s-Hertogenbosch, Nijmegen, The Netherlands
| | - Bernhard Schlechta
- Department of Obstetrics and Gynecology, Medical University of Vienna, Vienna, Austria
| | - Dirk Groenewegen
- Glycostem Therapeutics, s-Hertogenbosch, Nijmegen, The Netherlands
| | - Erhard Hofer
- Department of Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
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Azuma K, Komatsu N, Hattori S, Matsueda S, Kawahara A, Sasada T, Itoh K, Hoshino T. Humoral immune responses to EGFR-derived peptides predict progression-free and overall survival of non-small cell lung cancer patients receiving gefitinib. PLoS One 2014; 9:e86667. [PMID: 24497964 PMCID: PMC3909003 DOI: 10.1371/journal.pone.0086667] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Accepted: 12/12/2013] [Indexed: 11/19/2022] Open
Abstract
Somatic mutations in the epidermal growth factor receptor (EGFR) gene are associated with clinical response to EGFR tyrosine kinase inhibitors (TKIs), such as gefitinib, in patients with non-small cell lung cancer (NSCLC). However, humoral immune responses to EGFR in NSCLC patients have not been well studied. In this study, we investigated the clinical significance of immunoglobulin G (IgG) responses to EGFR-derived peptides in NSCLC patients receiving gefitinib. Plasma IgG titers to each of 60 different EGFR-derived 20-mer peptides were measured by the Luminex system in 42 NSCLC patients receiving gefitinib therapy. The relationships between the peptide-specific IgG titers and presence of EGFR mutations or patient survival were evaluated statistically. IgG titers against the egfr_481–500, egfr_721–740, and egfr_741–760 peptides were significantly higher in patients with exon 21 mutation than in those without it. On the other hand, IgG titers against the egfr_841–860 and egfr_1001–1020 peptides were significantly lower and higher, respectively, in patients with deletion in exon 19. Multivariate Cox regression analysis showed that IgG responses to egfr_41_ 60, egfr_61_80 and egfr_481_500 were significantly prognostic for progression-free survival independent of other clinicopathological characteristics, whereas those to the egfr_41_60 and egfr_481_500 peptides were significantly prognostic for overall survival. Detection of IgG responses to EGFR-derived peptides may be a promising method for prognostication of NSCLC patients receiving gefitinib. Our results may provide new insight for better understanding of humoral responses to EGFR in NSCLC patients.
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Affiliation(s)
- Koichi Azuma
- Division of Respirology, Neurology, and Rheumatology, Department of Internal Medicine, Kurume University School of Medicine, Kurume, Fukuoka, Japan
- * E-mail:
| | - Nobukazu Komatsu
- Department of Immunology, Kurume University School of Medicine, Kurume, Fukuoka, Japan
| | - Satoshi Hattori
- Biostatistics Center, Kurume University, Kurume, Fukuoka, Japan
| | - Satoko Matsueda
- Department of Immunology, Kurume University School of Medicine, Kurume, Fukuoka, Japan
| | - Akihiko Kawahara
- Department of Diagnostic Pathology, Kurume University Hospital, Kurume, Fukuoka, Japan
| | - Tetsuro Sasada
- Department of Immunology, Kurume University School of Medicine, Kurume, Fukuoka, Japan
| | - Kyogo Itoh
- Department of Immunology, Kurume University School of Medicine, Kurume, Fukuoka, Japan
| | - Tomoaki Hoshino
- Division of Respirology, Neurology, and Rheumatology, Department of Internal Medicine, Kurume University School of Medicine, Kurume, Fukuoka, Japan
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83
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Abstract
Melanoma is the most serious form of skin cancer. Metastatic melanoma historically carries a poor prognosis and until recently there have been few effective agents available to treat widely disseminated disease. Recognition of the immunogenic nature of melanoma has resulted in the development of various immunotherapeutic approaches, especially with regards to the programmed cell death 1 (PD-1) receptor and its ligand (PD-L1). Antibodies targeting the PD-1 axis have shown enormous potential in the treatment of metastatic melanoma. Here, we will review the immune basis for the disease and discuss approved immunotherapeutic options for advanced melanoma, as well as the current state of development of PD-1 and PD-L1 antibodies and their importance in shaping the future of melanoma treatment.
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Key Words
- AE, adverse event
- APC, antigen presenting cell
- ASCO, American Society of Clinical Oncology
- BMS-936559
- CTLA-4, cytotoxic T-lymphocyte-associated protein 4
- FDA, Food and Drug Administration
- ITIM , immunoreceptor tyrosine-based inhibitory motif
- ITSM, immunoreceptor tyrosine-based switch motif
- Ig, immunoglobulin
- MAPK, mitogen-activated protein kinase
- MHC, major histocompatibility complex
- MPDL3280A
- NK, natural killer
- ORR, objective response rate
- OS, overall survival
- PD, progressive disease
- PD-1
- PD-1, programmed cell death 1
- PD-L1
- PD-L1, programmed cell death ligand 1
- PD-L2
- PFS, progression free survival
- TCR, T cell receptor
- TIL, tumor infiltrating lymphocyte
- gp100, glycoprotein 100 vaccine
- immunotherapy
- melanoma
- nivolumab
- pembrolizumab
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Affiliation(s)
- Katy K Tsai
- University of California San Francisco; San Francisco, CA USA
| | - Inés Zarzoso
- University of California San Francisco; San Francisco, CA USA
| | - Adil I Daud
- University of California San Francisco; San Francisco, CA USA
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84
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Torino F, Barnabei A, Paragliola RM, Marchetti P, Salvatori R, Corsello SM. Endocrine side-effects of anti-cancer drugs: mAbs and pituitary dysfunction: clinical evidence and pathogenic hypotheses. Eur J Endocrinol 2013; 169:R153-64. [PMID: 24001893 DOI: 10.1530/eje-13-0434] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
mAbs are established targeted therapies for several diseases, including hematological and solid malignancies. These agents have shown a favorable toxicity profile, but, despite their high selectivity, new typical side-effects have emerged. In cancer patients, pituitary dysfunction may be mainly due to brain metastases or primary tumors and to related surgery and radiotherapy. Anticancer agents may induce hypopituitarism in patients cured for childhood cancers. These agents infrequently affect pituitary function in adult cancer patients. Notably, hypophysitis, a previously very rare disease, has emerged as a distinctive side-effect of ipilimumab and tremelimumab, two mAbs inhibiting the cytotoxic T-lymphocyte antigen-4 receptor, being occasionally seen with nivolumab, another immune checkpoint inhibitor. Enhanced antitumor immunity is the suggested mechanism of action of these drugs and autoimmunity the presumptive mechanism of their toxicity. Recently, ipilimumab has been licensed for the treatment of patients affected by metastatic melanoma. With the expanding use of these drugs, hypophysitis will be progressively encountered by oncologists and endocrinologists in clinical practice. The optimal management of this potentially life-threatening adverse event needs a rapid and timely diagnostic and therapeutic intervention. Hypopituitarism caused by these agents is rarely reversible, requiring prolonged or lifelong substitutive hormonal treatment. Further studies are needed to clarify several clinical and pathogenic aspects of this new form of secondary pituitary dysfunction.
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Affiliation(s)
- Francesco Torino
- Department of Systems Medicine, Chair of Medical Oncology, Tor Vergata University of Rome, Rome, Italy
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85
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Perez HL, Cardarelli PM, Deshpande S, Gangwar S, Schroeder GM, Vite GD, Borzilleri RM. Antibody-drug conjugates: current status and future directions. Drug Discov Today 2013; 19:869-81. [PMID: 24239727 DOI: 10.1016/j.drudis.2013.11.004] [Citation(s) in RCA: 299] [Impact Index Per Article: 27.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Revised: 09/27/2013] [Accepted: 11/04/2013] [Indexed: 01/25/2023]
Abstract
Antibody-drug conjugates (ADCs) aim to take advantage of the specificity of monoclonal antibodies (mAbs) to deliver potent cytotoxic drugs selectively to antigen-expressing tumor cells. Despite the simple concept, various parameters must be considered when designing optimal ADCs, such as selection of the appropriate antigen target and conjugation method. Each component of the ADC (the antibody, linker and drug) must also be optimized to fully realize the goal of a targeted therapy with improved efficacy and tolerability. Advancements over the past several decades have led to a new generation of ADCs comprising non-immunogenic mAbs, linkers with balanced stability and highly potent cytotoxic agents. Although challenges remain, recent clinical success has generated intense interest in this therapeutic class.
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Affiliation(s)
- Heidi L Perez
- Bristol-Myers Squibb Research & Development, Princeton, NJ 08543, USA
| | - Pina M Cardarelli
- Bristol-Myers Squibb Research & Development, Redwood City, CA 94063, USA
| | - Shrikant Deshpande
- Bristol-Myers Squibb Research & Development, Redwood City, CA 94063, USA
| | - Sanjeev Gangwar
- Bristol-Myers Squibb Research & Development, Redwood City, CA 94063, USA
| | | | - Gregory D Vite
- Bristol-Myers Squibb Research & Development, Princeton, NJ 08543, USA
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86
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Zitvogel L, Galluzzi L, Smyth MJ, Kroemer G. Mechanism of action of conventional and targeted anticancer therapies: reinstating immunosurveillance. Immunity 2013; 39:74-88. [PMID: 23890065 DOI: 10.1016/j.immuni.2013.06.014] [Citation(s) in RCA: 655] [Impact Index Per Article: 59.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2013] [Indexed: 12/15/2022]
Abstract
Conventional chemotherapeutics and targeted antineoplastic agents have been developed based on the simplistic notion that cancer constitutes a cell-autonomous genetic or epigenetic disease. However, it is becoming clear that many of the available anticancer drugs that have collectively saved millions of life-years mediate therapeutic effects by eliciting de novo or reactivating pre-existing tumor-specific immune responses. Here, we discuss the capacity of both conventional and targeted anticancer therapies to enhance the immunogenic properties of malignant cells and to stimulate immune effector cells, either directly or by subverting the immunosuppressive circuitries that preclude antitumor immune responses in cancer patients. Accumulating evidence indicates that the therapeutic efficacy of several antineoplastic agents relies on their capacity to influence the tumor-host interaction, tipping the balance toward the activation of an immune response specific for malignant cells. We surmise that the development of successful anticancer therapies will be improved and accelerated by the immunological characterization of candidate agents.
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87
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Abstract
We present a patient with advanced breast cancer treated with three cycles of docetaxel who developed repeated episodes of hypersensitivity pneumonitis, progressed to respiratory failure and death despite treatment with corticosteroids and supportive care. Docetaxel-induced hypersensitivity pneumonitis was diagnosed by excluding infection and tumor spread with bronchoalveolar lavage and lung biopsy. Physicians should consider such a condition in all patients who present with interstitial pneumonitis and respiratory failure when they are receiving docetaxel and treat them aggressively with steroids and supportive care, as it can be fatal.
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88
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Hedlund G, Eriksson H, Sundstedt A, Forsberg G, Jakobsen BK, Pumphrey N, Rödström K, Lindkvist-Petersson K, Björk P. The tumor targeted superantigen ABR-217620 selectively engages TRBV7-9 and exploits TCR-pMHC affinity mimicry in mediating T cell cytotoxicity. PLoS One 2013; 8:e79082. [PMID: 24194959 PMCID: PMC3806850 DOI: 10.1371/journal.pone.0079082] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2013] [Accepted: 09/26/2013] [Indexed: 01/20/2023] Open
Abstract
The T lymphocytes are the most important effector cells in immunotherapy of cancer. The conceptual objective for developing the tumor targeted superantigen (TTS) ABR-217620 (naptumomab estafenatox, 5T4Fab-SEA/E-120), now in phase 3 studies for advanced renal cell cancer, was to selectively coat tumor cells with cytotoxic T lymphocytes (CTL) target structures functionally similar to natural CTL pMHC target molecules. Here we present data showing that the molecular basis for the anti-tumor activity by ABR-217620 resides in the distinct interaction between the T cell receptor β variable (TRBV) 7-9 and the engineered superantigen (Sag) SEA/E-120 in the fusion protein bound to the 5T4 antigen on tumor cells. Multimeric but not monomeric ABR-217620 selectively stains TRBV7-9 expressing T lymphocytes from human peripheral blood similar to antigen specific staining of T cells with pMHC tetramers. SEA/E-120 selectively activates TRBV7-9 expressing T lymphocytes resulting in expansion of the subset. ABR-217620 selectively triggers TRBV7-9 expressing cytotoxic T lymphocytes to kill 5T4 positive tumor cells. Furthermore, ABR-217620 activates TRBV7-9 expressing T cell line cells in the presence of cell- and bead-bound 5T4 tumor antigen. Surface plasmon resonance analysis revealed that ABR-217620 binds to 5T4 with high affinity, to TRBV7-9 with low affinity and to MHC class II with very low affinity. The T lymphocyte engagement by ABR-217620 is constituted by displaying high affinity binding to the tumor cells (KD approximately 1 nM) and with the mimicry of natural productive immune TCR-pMHC contact using affinities of around 1 µM. This difference in kinetics between the two components of the ABR-217620 fusion protein will bias the binding towards the 5T4 target antigen, efficiently activating T-cells via SEA/E-120 only when presented by the tumor cells.
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Affiliation(s)
| | | | | | | | | | | | - Karin Rödström
- Experimental Medical Science, Lund University, Lund, Sweden
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89
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Peng Q, Cai H, Sun X, Li X, Mo Z, Shi J. Alocasia cucullata exhibits strong antitumor effect in vivo by activating antitumor immunity. PLoS One 2013; 8:e75328. [PMID: 24086508 PMCID: PMC3783377 DOI: 10.1371/journal.pone.0075328] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Accepted: 08/11/2013] [Indexed: 12/31/2022] Open
Abstract
Chinese herbal medicines have long been used to treat various illnesses by modulating the human immune response. In this study, we investigate the immuno-modulating effect and antitumor activity of Alocasia Cucullata (AC), a Chinese herb traditionally used to treat infection and cancer. We found that the whole water extract of AC roots could significantly attenuate tumor growth in mouse tumor models. The median survival time of the AC-treated mice was 43 days, 16 days longer than that of the control group. Moreover, the AC-treated mice showed substantially higher induction of key antitumor cytokines, such as IL-2, IFN-γ, and TNF-α, indicating that AC may exert antitumor effect by activating antitumor immunity. To further pinpoint the cellular and molecular mechanism of AC, we studied the dose response of a human monocytic cell line, THP-1, to the whole water extract of AC. Treatment of the AC extract significantly induced THP-1 differentiation into macrophage-like cells and the differentiated THP-1 showed expression of specific macrophage surface markers, such as CD11b and CD14, as well as productions of antitumor cytokines, e.g. IFN-γ and TNF-α. Our data thus point to AC as potentially a new, alternative immuno-modulating herbal remedy for anticancer treatment.
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Affiliation(s)
- Qiuxian Peng
- School of Chinese Medicine, Southern Medical University, Guangzhou, China
- Centre for Quantitative Systems Biology, Department of Physics and Department of Biology, Hong Kong Baptist University, Hong Kong, China
| | - Hongbing Cai
- School of Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Xuegang Sun
- School of Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Xin Li
- School of Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Zhixian Mo
- School of Chinese Medicine, Southern Medical University, Guangzhou, China
- * E-mail: (ZM); (JS)
| | - Jue Shi
- School of Chinese Medicine, Southern Medical University, Guangzhou, China
- Centre for Quantitative Systems Biology, Department of Physics and Department of Biology, Hong Kong Baptist University, Hong Kong, China
- * E-mail: (ZM); (JS)
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90
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Vannucci L, Krizan J, Sima P, Stakheev D, Caja F, Rajsiglova L, Horak V, Saieh M. Immunostimulatory properties and antitumor activities of glucans (Review). Int J Oncol 2013; 43:357-64. [PMID: 23739801 PMCID: PMC3775562 DOI: 10.3892/ijo.2013.1974] [Citation(s) in RCA: 127] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Accepted: 05/17/2013] [Indexed: 12/25/2022] Open
Abstract
New foods and natural biological modulators have recently become of scientific interest in the investigation of the value of traditional medical therapeutics. Glucans have an important part in this renewed interest. These fungal wall components are claimed to be useful for various medical purposes and they are obtained from medicinal mushrooms commonly used in traditional Oriental medicine. The immunotherapeutic properties of fungi extracts have been reported, including the enhancement of anticancer immunity responses. These properties are principally related to the stimulation of cells of the innate immune system. The discovery of specific receptors for glucans on dendritic cells (dectin-1), as well as interactions with other receptors, mainly expressed by innate immune cells (e.g., Toll-like receptors, complement receptor-3), have raised new attention toward these products as suitable therapeutic agents. We briefly review the characteristics of the glucans from mycelial walls as modulators of the immunity and their possible use as antitumor treatments.
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Affiliation(s)
- Luca Vannucci
- Laboratory of Immunotherapy, Department of Immunology and Gnotobiology, Institute of Microbiology, Academy of Sciences of Czech Republic, v.v.i., 142 20 Prague 4, Czech Republic.
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91
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Stephenson RM, Lim CM, Matthews M, Dietsch G, Hershberg R, Ferris RL. TLR8 stimulation enhances cetuximab-mediated natural killer cell lysis of head and neck cancer cells and dendritic cell cross-priming of EGFR-specific CD8+ T cells. Cancer Immunol Immunother 2013; 62:1347-57. [PMID: 23685782 PMCID: PMC3720845 DOI: 10.1007/s00262-013-1437-3] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Accepted: 05/10/2013] [Indexed: 11/24/2022]
Abstract
BACKGROUND Cetuximab is an anti-epidermal growth factor receptor (EGFR) monoclonal antibody that prolongs survival in the treatment for head and neck cancer (HNC), but only in 10-20 % of patients. An immunological mechanism of action such as natural killer (NK) cell-mediated antibody-dependent cellular cytotoxicity (ADCC) has been suggested. We investigated the effects of activating toll-like receptor (TLR)-8 to enhance activity of cetuximab-stimulated, FcγR-bearing cells. OBJECTIVE To determine the capability of TLR8-stimulation to enhance the activation and function of NK cells and dendritic cells (DC) in the presence of cetuximab-coated HNC cells. METHODS Peripheral blood mononuclear cells (PBMC), NK, DC, and CD8(+) T cells were isolated and analyzed using (51)Cr release ADCC, flow cytometry analysis, cytokine ELISA, and EGFR853-861 tetramer staining. RESULTS TLR8 stimulation of unfractionated PBMC led to enhanced cetuximab-mediated ADCC in healthy donors (p < 0.01) and HNC patients (p < 0.001), which was dependent on NK cells. Secretion of Th1 cytokines TNFα (p < 0.0001), IFNγ (p < 0.0001), and IL-12p40 (p < 0.005) was increased. TLR8 stimulation of PBMC augmented cetuximab-enhanced NK cell degranulation (p < 0.001). TLR8-stimulated NK cells enhanced DC maturation markers CD80, CD83, and CD86 in co-culture with cetuximab-treated HNC cells. TLR8 stimulation of NK-DC co-cultures significantly increased DC priming of EGFR-specific CD8(+) T cells in the presence of cetuximab. DISCUSSION VTX-2337 and cetuximab combination therapy can activate innate and adaptive anti-cancer immune responses. Further investigation in human trials will be important for determining the clinical benefit of this combination and for determining biomarkers of response.
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MESH Headings
- Antibodies, Monoclonal, Humanized/immunology
- Antibodies, Monoclonal, Humanized/pharmacology
- Antibody-Dependent Cell Cytotoxicity/drug effects
- Antibody-Dependent Cell Cytotoxicity/immunology
- Antigens, CD/immunology
- Antigens, CD/metabolism
- Antineoplastic Agents/immunology
- Antineoplastic Agents/pharmacology
- B7-1 Antigen/immunology
- B7-1 Antigen/metabolism
- B7-2 Antigen/immunology
- B7-2 Antigen/metabolism
- Benzazepines/immunology
- Benzazepines/pharmacology
- CD8-Positive T-Lymphocytes/immunology
- CD8-Positive T-Lymphocytes/metabolism
- Cell Line, Tumor
- Cells, Cultured
- Cetuximab
- Coculture Techniques
- Cross-Priming/immunology
- Dendritic Cells/immunology
- Dendritic Cells/metabolism
- Enzyme-Linked Immunosorbent Assay
- ErbB Receptors/immunology
- ErbB Receptors/metabolism
- Flow Cytometry
- Head and Neck Neoplasms/immunology
- Head and Neck Neoplasms/metabolism
- Head and Neck Neoplasms/pathology
- Humans
- Immunoglobulins/immunology
- Immunoglobulins/metabolism
- Interferon-gamma/immunology
- Interferon-gamma/metabolism
- Interleukin-12 Subunit p40/immunology
- Interleukin-12 Subunit p40/metabolism
- Killer Cells, Natural/immunology
- Killer Cells, Natural/metabolism
- Membrane Glycoproteins/immunology
- Membrane Glycoproteins/metabolism
- Toll-Like Receptor 8/agonists
- Toll-Like Receptor 8/immunology
- Toll-Like Receptor 8/metabolism
- Tumor Necrosis Factor-alpha/immunology
- Tumor Necrosis Factor-alpha/metabolism
- CD83 Antigen
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Affiliation(s)
- Ryan M. Stephenson
- Department of Otolaryngology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Chwee Ming Lim
- Department of Otolaryngology, University of Pittsburgh, Pittsburgh, PA, USA
| | | | | | | | - Robert L. Ferris
- Department of Otolaryngology, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Immunology, University of Pittsburgh, Pittsburgh, PA, USA
- Cancer Immunology Program, University of Pittsburgh Cancer Institute, Pittsburgh, PA, USA
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92
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Wolchok JD, Hodi FS, Weber JS, Allison JP, Urba WJ, Robert C, O'Day SJ, Hoos A, Humphrey R, Berman DM, Lonberg N, Korman AJ. Development of ipilimumab: a novel immunotherapeutic approach for the treatment of advanced melanoma. Ann N Y Acad Sci 2013; 1291:1-13. [PMID: 23772560 PMCID: PMC3910157 DOI: 10.1111/nyas.12180] [Citation(s) in RCA: 217] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The immunotherapeutic agent ipilimumab has helped address a significant unmet need in the treatment of advanced melanoma. Ipilimumab is a fully human monoclonal antibody that targets cytotoxic T-lymphocyte antigen-4 (CTLA-4), thereby augmenting antitumor immune responses. After decades in which a number of clinical trials were conducted, ipilimumab was the first therapy to improve overall survival in a randomized, controlled phase III trial of patients with advanced melanoma. These results led to the regulatory approval of ipilimumab at 3 mg/kg for the treatment of unresectable or metastatic melanoma. More than 17,000 patients worldwide have received ipilimumab, either as a commercial drug at 3 mg/kg or in clinical trials and expanded access programs at different doses. Consistent with its proposed mechanism of action, the most common toxicities associated with ipilimumab therapy are inflammatory in nature. These immune-related adverse events were mostly reversible when effective treatment guidelines were followed. Importantly, long-term follow-up of patients who received ipilimumab in a phase III trial showed that 24% survived at least two years, and in phase II studies, a proportion of patients survived at least five years. Evaluation of ipilimumab is ongoing in the adjuvant setting for melanoma, and for advanced disease in nonsmall cell lung, small cell lung, prostate, ovarian, and gastric cancers.
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Affiliation(s)
- Jedd D Wolchok
- Memorial Sloan-Kettering Cancer Center, New York, New York 10021, USA.
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93
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Hashimi SM, Yu S, Alqurashi N, Ipe DS, Wei MQ. Immunotoxin-mediated targeting of claudin-4 inhibits the proliferation of cancer cells. Int J Oncol 2013; 42:1911-8. [PMID: 23563899 DOI: 10.3892/ijo.2013.1881] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2012] [Accepted: 11/26/2012] [Indexed: 11/06/2022] Open
Abstract
Immunotoxins are engineered chimeric proteins that consist of a fragment of a toxin fused to a modified antibody or growth factor capable of targeting specific cells. Furthermore, these proteins can be targeted to receptors that are commonly overexpressed on cancer cells. The majority of immunotoxins function by binding to cells, translocating into the cytosol and inhibiting protein synthesis. In this study, the expression of claudin‑4 (CLDN4) in various cancer cells was analysed as a potential target for immunotoxins. To target CLDN4-expressing cancer cells, the c-terminal CLDN4‑binding domain of Clostridium perfringens enterotoxin (CPE) was fused to the Pseudomonas aeruginosa exotoxin A (ETA) domain to create an immunotoxin (CPE‑ETA'). Subsequently, the capacity of such an immunotoxin in suppressing the proliferation of CLDN4-positive cancer cells was investigated. We report that head and neck squamous carcinoma cells (HN5) have an elevated CLDN4 expression compared to the other cell lines tested. Our findings further demonstrate that CPE‑ETA' is highly potent against MCF-7 breast [50% inhibitory concentration (IC50) 9.8 ng/ml] and HN5 head/neck (IC50 8.8 ng/ml) cancer cell lines, while it has no cytotoxic effects on HeLa cells (CLDN4‑negative). The immunotoxin was subsequently expressed in the tumour colonising oncolytic strain, Clostridium ghonii. Most importantly, the strictly anaerobic Clostridium ghonii was able to overexpress and secrete a functional CPE‑ETA' fusion protein. Our findings open the possibility of the targeted delivery of the immunotoxin locally to tumour sites at a high concentration using strictly anaerobic Clostridium ghonii for the treatment of CLDN4-positive cancer cells.
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Affiliation(s)
- S M Hashimi
- Division of Molecular and Gene Therapies, Griffith Health Institute and School of Medical Science, Griffith University, Gold Coast, Queensland 4215, Australia
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94
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Patel SP, Bristol A, Saric O, Wang XP, Dubeykovskiy A, Arlen PM, Morse MA. Anti-tumor activity of a novel monoclonal antibody, NPC-1C, optimized for recognition of tumor antigen MUC5AC variant in preclinical models. Cancer Immunol Immunother 2013; 62:1011-9. [PMID: 23591984 PMCID: PMC11029159 DOI: 10.1007/s00262-013-1420-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2012] [Accepted: 03/20/2013] [Indexed: 12/22/2022]
Abstract
PURPOSE NPC-1C is a chimeric immunoglobulin IgG1 developed from antigen tested in the Hollinshead tumor vaccine trials that recognizes an immunogenic MUC5AC-related tumor-associated antigen. In this article, we describe the pre-clinical characterization of this antibody that is currently being tested in human clinical trials. EXPERIMENTAL DESIGN The specificity of NPC-1C for pancreatic and colorectal cancer cell lines was tested by flow cytometry assays and immunohistochemical staining. Antibody-dependent cell cytotoxicity was measured using a tumor cell line lysis assay. Anti-tumor efficacy and biodistribution were assessed in nude mice bearing human pancreatic tumor xenografts. RESULTS Human tumor cell binding measured by flow cytometry ranged from 52 to 94 % of cells stained positive with NPC-1C in three colorectal and one pancreatic cell lines, while IHC demonstrated staining of 43 % of colon cancers and 48 % of pancreatic cancer tissues, with little or no cross-reactivity of NPC-1C with normal colon or pancreas tissues. In vitro NPC-1C-mediated tumor cell killing occurred in a median of 44.5 % of four colorectal and three pancreatic tumor cell lines. In vivo anti-tumor efficacy in a human pancreatic CFPAC-1 tumor xenograft model was demonstrated with a twofold to threefold reduction in tumor growth in the NPC-1C-treated mice compared to saline and human IgG controls. Pharmacodynamic studies indicate NPC-1C localizes in antigen-positive tumors and has minimal uptake in normal mouse tissues. CONCLUSIONS NPC-1C, a chimeric monoclonal antibody that reacts with a MUC5AC-related antigen expressed by pancreatic and colorectal tumor tissues, has promising preclinical activity in pancreatic and colorectal adenocarcinoma.
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Affiliation(s)
- Sandip Pravin Patel
- Division of Hematology/Oncology, Duke Cancer Institute, Duke University Medical Center, DUMC 3841, 2301 Erwin Road, Durham, NC 27710, USA.
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95
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Ladányi A, Balatoni T. [Unblocking antitumor immune response: novel possibilities for the immunotherapy of melanoma]. Magy Onkol 2013; 57:100-107. [PMID: 23795355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Accepted: 04/28/2013] [Indexed: 06/02/2023]
Abstract
Recent advances in tumor immunology, a better understanding of mechanisms regulating the immune response has led to experimental and clinical testing of a novel type of immunotherapeutics: antibodies blocking negative regulatory mechanisms of T-cell activation [corrected]. The application of the CTLA-4 antagonist ipilimumab, the prototype of this new class of immune stimulating agents, represents the first treatment that resulted in significant prolongation of the survival of metastatic melanoma patients in randomized, controlled trial, leading to the approval of its use for the therapy of these patients in 2011. Together with the BRAF inhibitor vemurafenib, which was also approved in 2011, ipilimumab has changed the standard therapy of metastatic melanoma, and also paved the way for other agents aiming at influencing immune regulating molecules, of which antibodies blocking the PD-1 pathway also showed promising clinical activity. According to clinical experience collected so far, these agents induce objective tumor response in a relatively small proportion of patients, with a characteristic response kinetics frequently showing delayed activity, but resulting in durable remission in a considerable proportion of the responding patients. On the other hand, antitumor activity is frequently accompanied by significant toxicity. The spectrum of side effects is different from that of conventional therapies, and a large part of them is caused by the enhanced systemic immune activity. In order to spare non-responding patients of the severe side effects and to increase response rate, the search for biomarkers that could help in identifying patients likely to react to the treatment represents an important focus of studies. Furthermore, development of combinations with other immunotherapeutic modalities, chemo- or targeted therapies may further increase the efficiency of immunomodulatory antibodies.
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Affiliation(s)
- Andrea Ladányi
- Sebészi és Molekuláris Patológiai Osztály, Országos Onkológiai Intézet, Budapest, Hungary.
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96
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Wang Z, You H, Song S. [Inhibiting effect of IL-10 in tumor microenvironment on anti-tumor activity of SOCS1-silenced DC vaccine]. Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi 2013; 29:379-383. [PMID: 23643168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
OBJECTIVE To observe the anti-tumor effect of suppressors of cytokine signaling 1(SOCS1)-silenced dentritic cell (DC) vaccines in melanoma-bearing mice, and the influence of IL-10 in the tumor microenvironment on DC vaccine action. METHODS To obtain SOCS1-silenced DCs, DCs derived from mouse bone marrow cells ex vivo were induced to differentiation in the presence of granulocyte-macrophage colony-stimulating factor (GM-CSF) and IL-4, and then transduced with Len-SOCS1-shRNA or control Len-GFP lentiviruses. The SOCS1-silenced DCs were loaded by TRP2 peptide to prepare the DC vaccine, which was induced to mature by LPS. The DCs were analyzed by flow cytometry (FCM) for surface expressions of MHCII and CD86 and by real-time PCR for the expressions of SOCS1, IL-10 as well as IL-12p40. B16 or IL-10-silenced B16 (IL-10(-/-);) cells were inoculated into C57BL/6 mice. Five days later, the mice were randomly divided into 3 groups (PBS-DC, Len-DC and SOCS1-shRNA-DC groups) and injected with 1×10⁶;/100 μL per mouse of the transduced DCs or PBS-DCs. We observed the tumor growth and the survival of the tumor-bearing mice. Tumor-infiltrating leukocytes (TIL) were isolated from tumor tissues using the discontinuous gradient centrifugation and the distribution of CD8⁺;T was analyzed by FCM; IFN-γ secretion and CTL activity were detected by the ELISpot and the standard microcytotoxicity assay, respectively. RESULTS SOCS1 expression in DCs was down-regulated by 80% after Len-SOCS1-shRNA lentivirus infection. In the DCs with down-regulated SOCS1 expression, the expressions of MHCII and CD86 increased a little, which did not differ significantly from the control DCs, and IL-10 level dropped and IL-12p40 went up significantly compared with the control DCs. There was no any effect of SOCS1-silenced DCs on the survival of melanoma-bearing mice, however, the survival of B16-IL-10(-/-);-bearing mice was promoted(P<0.05). The further investigation showed that SOCS1-shRNA DCs raised the number of CD8⁺;T lymphocytes, promoted the TRP2-specific IFN-γ production and CTL responses in B16-IL-10(-/-);-bearing mice. CONCLUSION The activity of the DC vaccine could be enhanced by silencing SOCS1 expression; however, the anti-tumor activity of SOCS1-silenced DC vaccine could be inhibited by IL-10 in tumor microenvironment.
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Affiliation(s)
- Zhihua Wang
- Key Laboratory of Senile Disease, Hebei People's Hospital, Shijiazhuang 050012, China.
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97
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Eisenberg S. The case of the regional risk. ONS Connect 2013; 28:40. [PMID: 23495530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
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98
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Thomas M, Kienast Y, Scheuer W, Bähner M, Kaluza K, Gassner C, Herting F, Brinkmann U, Seeber S, Kavlie A, Welschof M, Ries S, Weidner KM, Regula JT, Klein C. A novel angiopoietin-2 selective fully human antibody with potent anti-tumoral and anti-angiogenic efficacy and superior side effect profile compared to Pan-Angiopoietin-1/-2 inhibitors. PLoS One 2013; 8:e54923. [PMID: 23405099 PMCID: PMC3566157 DOI: 10.1371/journal.pone.0054923] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2012] [Accepted: 12/19/2012] [Indexed: 11/29/2022] Open
Abstract
There is increasing experimental evidence for an important role of Angiopoietin-2 (Ang-2) in tumor angiogenesis and progression. In addition, Ang-2 is up-regulated in many cancer types and correlated with poor prognosis. To investigate the functional role of Ang-2 inhibition in tumor development and progression, we generated novel fully human antibodies that neutralize specifically the binding of Ang-2 to its receptor Tie2. The selected antibodies LC06 and LC08 recognize both rodent and human Ang-2 with high affinity, but LC06 shows a higher selectivity for Ang-2 over Ang-1 compared to LC08 which can be considered an Ang-2/Ang-1 cross-reactive antibody. Our data demonstrate that Ang-2 blockade results in potent tumor growth inhibition and pronounced tumor necrosis in subcutaneous and orthotopic tumor models. These effects are attended with a reduction of intratumoral microvessel density and tumor vessels characterized by fewer branches and increased pericyte coverage. Furthermore, anti-Ang-2 treatment strongly inhibits the dissemination of tumor cells to the lungs. Interestingly, in contrast to the Ang-2/Ang-1 cross-reactive antibody LC08 that leads to a regression of physiological vessels in the mouse trachea, the inhibition with the selective anti-Ang-2 antibody LC06 appears to be largely restricted to tumor vasculature without obvious effects on normal vasculature. Taken together, these data provide strong evidence for the selective Ang-2 antibody LC06 as promising new therapeutic agent for the treatment of various cancers.
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Affiliation(s)
- Markus Thomas
- Discovery Oncology, Pharma Research and Early Development, Roche Diagnostics GmbH, Penzberg, Germany.
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Si S, Song S, Shi L, Liu J, Xu B, Yi Y, Tan X, Zhang J. [Simulated weightlessness inhibits antitumor immunity of T lymphocytes in melanoma-bearing mice]. Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi 2013; 29:127-131. [PMID: 23388329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
OBJECTIVE To investigate the effects of simulated weightlessness on antitumor immunity of T lymphocytes in mice. METHODS The malignant melanoma was xenografted by subcutaneous injection of B16 cells into the right hind limb of every mouse. The mice suspended by tail at a -15 degree to 20 degree head-down tilt were used as simulated weightlessness models. The effects of simulated weightlessness on tumor volume and survival time were observed. T the numbers of leucocytes, lymphocytes and T lymphocyte subsets in peripheral blood of tumor-bearing mice under simulated weightlessness were monitored by an automatic hemacytometer and a flow cytometer. The effects of simulated weightlessness on the production of IL-2, TNF-α and IFN-γ in T lymphocytes and the cytotoxicities of tumor-specific CTLs to tumor cells were analyzed by ELISA and LDH release. RESULTS Compared with control group, the tumors grew faster, the survival times were shorter, the number of lymphocytes, the ratio of lymphocytes, CD3(+);, CD4(+);/CD3(+); and CD8(+);/CD3(+); T lymphocytes in peripheral blood dropped, and the proliferation of splenic T lymphocytes induced by mitogen was reduced (P<0.05 or P<0.01) in the simulated weightlessness group. The production of IL-2, TNF-α and IFN-γ induced by tumor cells and cytotoxicities of tumor-specific CTLs to tumor cells were inhibited in mice under simulated weightlessness (P<0.05 or P<0.01). CONCLUSION Simulated weightlessness inhibits antitumor immunity of T lymphocytes.
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Affiliation(s)
- Shaoyan Si
- Department of Pathology and Experimental Medicine, 306th Hospital of PLA, Beijing 100101, China.
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100
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Tang Z, Feng M, Gao W, Phung Y, Chen W, Chaudhary A, St Croix B, Qian M, Dimitrov DS, Ho M. A human single-domain antibody elicits potent antitumor activity by targeting an epitope in mesothelin close to the cancer cell surface. Mol Cancer Ther 2013; 12:416-26. [PMID: 23371858 DOI: 10.1158/1535-7163.mct-12-0731] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Monoclonal antibodies against mesothelin are being evaluated for the treatment of mesothelioma and multiple forms of cancers, and show great promise for clinical development for solid cancers. Antibodies against mesothelin have been shown to act via immunotoxin-based inhibition of tumor growth and induction of antibody-dependent cell-mediated cytotoxicity (ADCC). However, complement-dependent cytotoxicity (CDC), considered an important additional mechanism of therapeutic antibodies against tumors, is inactive for such antibodies. Here, we used phage display antibody engineering technology and synthetic peptide screening to identify SD1, a human single-domain antibody to mesothelin. SD1 recognizes a conformational epitope at the C-terminal end (residues 539-588) of mesothelin close to the cell surface. To investigate SD1 as a potential therapeutic agent, we generated a recombinant human Fc (SD1-hFc) fusion protein. Interestingly, the SD1-hFc protein exhibits strong CDC activity, in addition to ADCC, against mesothelin-expressing tumor cells. Furthermore, it causes growth inhibition of human tumor xenografts in nude mice as a single agent. SD1 is the first human single-domain antibody targeting mesothelin-expressing tumors, shows potential as a cancer therapeutic candidate, and may improve current antibody therapy targeting mesothelin-expressing tumors.
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Affiliation(s)
- Zhewei Tang
- Institute of Biomedical Sciences, School of Life Sciences, East China Normal University, Shanghai, China
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