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Zhou R, Wu ST, Yazdanifar M, Williams C, Sanders A, Brouwer C, Maher J, Mukherjee P. Mucin-1-Targeted Chimeric Antigen Receptor T Cells Are Effective and Safe in Controlling Solid Tumors in Immunocompetent Host. J Immunother 2024; 47:77-88. [PMID: 38270462 PMCID: PMC10913860 DOI: 10.1097/cji.0000000000000505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 12/14/2023] [Indexed: 01/26/2024]
Abstract
The chimeric antigen receptor (CAR) T-cell therapy in solid epithelial tumors has been explored, however, with limited success. As much of the preclinical work has relied on xenograft models in immunocompromised animals, the immune-related efficacies and toxicities may have been missed. In this study, we engineered syngeneic murine CAR T cells targeting the tumor form of human mucin-1 (tMUC1) and tested the MUC1 CAR T cells' efficacy and toxicity in the immunocompetent human MUC1-expressing mouse models. The MUC1 CAR T cells significantly eliminated murine pancreatic and breast cancer cell lines in vitro. In vivo, MUC1 CAR T cells significantly slowed the mammary gland tumor progression in the spontaneous PyVMT×MUC1.Tg (MMT) mice, prevented lung metastasis, and prolonged survival. Most importantly, there was minimal short or long-term toxicity with acceptable levels of transient liver toxicity but no kidney toxicity. In addition, the mice did not show any signs of weight loss or other behavioral changes with the treatment. We also report that a single dose of MUC1 CAR T-cell treatment modestly reduced the pancreatic tumor burden in a syngeneic orthotopic model of pancreatic ductal adenocarcinoma given at late stage of an established tumor. Taken together, these findings suggested the further development of tMUC1-targeted CAR T cells as an effective and relatively safe treatment modality for various tMUC1-expressing solid tumors.
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Affiliation(s)
- Ru Zhou
- Department of Biological Sciences, University of North Carolina at Charlotte, Charlotte, NC
| | - Shu-ta Wu
- Department of Biological Sciences, University of North Carolina at Charlotte, Charlotte, NC
- Medpace, Irving, TX
| | - Mahboubeh Yazdanifar
- Department of Biological Sciences, University of North Carolina at Charlotte, Charlotte, NC
- Adaptive Biotechnologies, South San Francisco, CA
| | - Chandra Williams
- Department of Biological Sciences, University of North Carolina at Charlotte, Charlotte, NC
- Pfizer, Cambridge, MA
| | - Alexa Sanders
- Department of Bioinformatics, University of North Carolina at Charlotte, Charlotte, NC
| | - Cory Brouwer
- Department of Bioinformatics, University of North Carolina at Charlotte, Charlotte, NC
| | - John Maher
- King’s College London, School of Cancer and Pharmaceutical Sciences, Guy’s Cancer Centre, London, UK
| | - Pinku Mukherjee
- Department of Biological Sciences, University of North Carolina at Charlotte, Charlotte, NC
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2
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Pifferi C, Aguinagalde L, Ruiz-de-Angulo A, Sacristán N, Baschirotto PT, Poveda A, Jiménez-Barbero J, Anguita J, Fernández-Tejada A. Development of synthetic, self-adjuvanting, and self-assembling anticancer vaccines based on a minimal saponin adjuvant and the tumor-associated MUC1 antigen. Chem Sci 2023; 14:3501-3513. [PMID: 37006677 PMCID: PMC10055764 DOI: 10.1039/d2sc05639a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 03/01/2023] [Indexed: 03/05/2023] Open
Abstract
The overexpression of aberrantly glycosylated tumor-associated mucin-1 (TA-MUC1) in human cancers makes it a major target for the development of anticancer vaccines derived from synthetic MUC1-(glyco)peptide antigens. However, glycopeptide-based subunit vaccines are weakly immunogenic, requiring adjuvants and/or additional immunopotentiating approaches to generate optimal immune responses. Among these strategies, unimolecular self-adjuvanting vaccine constructs that do not need coadministration of adjuvants or conjugation to carrier proteins emerge as a promising but still underexploited approach. Herein, we report the design, synthesis, immune-evaluation in mice, and NMR studies of new, self-adjuvanting and self-assembling vaccines based on our QS-21-derived minimal adjuvant platform covalently linked to TA-MUC1-(glyco)peptide antigens and a peptide helper T-cell epitope. We have developed a modular, chemoselective strategy that harnesses two distal attachment points on the saponin adjuvant to conjugate the respective components in unprotected form and high yields via orthogonal ligations. In mice, only tri-component candidates but not unconjugated or di-component combinations induced significant TA-MUC1-specific IgG antibodies able to recognize the TA-MUC1 on cancer cells. NMR studies revealed the formation of self-assembled aggregates, in which the more hydrophilic TA-MUC1 moiety gets exposed to the solvent, favoring B-cell recognition. While dilution of the di-component saponin-(Tn)MUC1 constructs resulted in partial aggregate disruption, this was not observed for the more stably-organized tri-component candidates. This higher structural stability in solution correlates with their increased immunogenicity and suggests a longer half-life of the construct in physiological media, which together with the enhanced antigen multivalent presentation enabled by the particulate self-assembly, points to this self-adjuvanting tri-component vaccine as a promising synthetic candidate for further development.
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Affiliation(s)
- Carlo Pifferi
- Chemical Immunology Laboratory, Center for Cooperative Research in Biosciences (CIC BioGUNE), Basque Research and Technology Alliance (BRTA) Biscay Technology Park, Building 801A 48160 Derio Spain
| | - Leire Aguinagalde
- Chemical Immunology Laboratory, Center for Cooperative Research in Biosciences (CIC BioGUNE), Basque Research and Technology Alliance (BRTA) Biscay Technology Park, Building 801A 48160 Derio Spain
| | - Ane Ruiz-de-Angulo
- Chemical Immunology Laboratory, Center for Cooperative Research in Biosciences (CIC BioGUNE), Basque Research and Technology Alliance (BRTA) Biscay Technology Park, Building 801A 48160 Derio Spain
| | - Nagore Sacristán
- Chemical Immunology Laboratory, Center for Cooperative Research in Biosciences (CIC BioGUNE), Basque Research and Technology Alliance (BRTA) Biscay Technology Park, Building 801A 48160 Derio Spain
| | - Priscila Tonon Baschirotto
- Chemical Immunology Laboratory, Center for Cooperative Research in Biosciences (CIC BioGUNE), Basque Research and Technology Alliance (BRTA) Biscay Technology Park, Building 801A 48160 Derio Spain
| | - Ana Poveda
- Chemical Glycobiology Laboratory, CIC BioGUNE, BRTA Spain
| | - Jesús Jiménez-Barbero
- Chemical Glycobiology Laboratory, CIC BioGUNE, BRTA Spain
- Ikerbasque, Basque Foundation for Science Maria Diaz de Haro 13 48009 Bilbao Spain
- Department of Organic Chemistry II, Faculty of Science & Technology, University of the Basque Country 48940 Leioa Spain
- Centro de Investigación Biomédica En Red de Enfermedades Respiratorias Av. Monforte de Lemos, 3-5 28029 Madrid Spain
| | - Juan Anguita
- Ikerbasque, Basque Foundation for Science Maria Diaz de Haro 13 48009 Bilbao Spain
- Inflammation and Macrophage Plasticity Laboratory, CIC BioGUNE, BRTA Spain
| | - Alberto Fernández-Tejada
- Chemical Immunology Laboratory, Center for Cooperative Research in Biosciences (CIC BioGUNE), Basque Research and Technology Alliance (BRTA) Biscay Technology Park, Building 801A 48160 Derio Spain
- Ikerbasque, Basque Foundation for Science Maria Diaz de Haro 13 48009 Bilbao Spain
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Dong P, Cheng S, Wang Y, Gao H, Zhang Y, Zhu T, Yu P, Meng X. A self-adjuvanting anti-tumor nanoliposomal vaccine based on fluorine-substituted MUC1 glycopeptide. Chem Commun (Camb) 2022; 58:8642-8645. [PMID: 35820186 DOI: 10.1039/d2cc02143a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Herein, a self-adjuvanting fluorinated MUC1-based nanoliposomal antitumor vaccine was constructed for the first time. Both the tumor-associated antigen and the mode of its presentation affect the immune response for antitumor vaccines.
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Affiliation(s)
- Peijie Dong
- Key Laboratory of Industrial Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Tianjin 300457, P. R. China.
| | - Suying Cheng
- Key Laboratory of Industrial Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Tianjin 300457, P. R. China.
| | - Yudie Wang
- Key Laboratory of Industrial Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Tianjin 300457, P. R. China.
| | - Hang Gao
- Key Laboratory of Industrial Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Tianjin 300457, P. R. China.
| | - Yongmin Zhang
- Key Laboratory of Industrial Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Tianjin 300457, P. R. China. .,Sorbonne Université, Institut Parisien de Chimie Moléculaire, UMR CNRS 8232, 4 place Jussieu, 75005, Paris, France
| | - Tao Zhu
- Key Laboratory of Industrial Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Tianjin 300457, P. R. China. .,CanSino Biologics Inc., Tianjin Enterprise Key Laboratory of Respiratory Bacterial Recombination and Conjugated Vaccine, Tianjin 300457, China
| | - Peng Yu
- Key Laboratory of Industrial Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Tianjin 300457, P. R. China.
| | - Xin Meng
- Key Laboratory of Industrial Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Tianjin 300457, P. R. China.
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McFall-Boegeman H, Huang X. Mechanisms of cellular and humoral immunity through the lens of VLP-based vaccines. Expert Rev Vaccines 2022; 21:453-469. [PMID: 35023430 PMCID: PMC8960355 DOI: 10.1080/14760584.2022.2029415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
INTRODUCTION Vaccination can be effective defense against many infectious agents and the corresponding diseases. Discoveries elucidating the mechanisms of the immune system have given hopes to developing vaccines against diseases recalcitrant to current treatment/prevention strategies. One such finding is the ability of immunogenic biological nanoparticles to powerfully boost the immunogenicity of poorer antigens conjugated to them with virus-like particle (VLP)-based vaccines as a key example. VLPs take advantage of the well-defined molecular structures associated with sub-unit vaccines and the immunostimulatory nature of conjugate vaccines. AREAS COVERED In this review, we will discuss how advances in understanding the immune system can inform VLP-based vaccine design and how VLP-based vaccines have uncovered underlying mechanisms in the immune system. EXPERT OPINION As our understanding of mechanisms underlying the immune system increases, that knowledge should inform our vaccine design. Testing of proof-of-concept vaccines in the lab should seek to elucidate the underlying mechanisms of immune responses. The integration of these approaches will allow for VLP-based vaccines to live up to their promise as a powerful plug-and-play platform for next generation vaccine development.
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Affiliation(s)
- Hunter McFall-Boegeman
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA.,Institute for Quantitative Health Science and Engineering, Michigan State University, East Lansing, Michigan 48824, USA
| | - Xuefei Huang
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA.,Institute for Quantitative Health Science and Engineering, Michigan State University, East Lansing, Michigan 48824, USA.,Department of Biomedical Engineering, Michigan State University, East Lansing, Michigan 48824, USA
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5
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Kumar AR, Devan AR, Nair B, Nair RR, Nath LR. Biology, Significance and Immune Signaling of Mucin 1 in Hepatocellular Carcinoma. Curr Cancer Drug Targets 2022; 22:725-740. [PMID: 35301949 DOI: 10.2174/1568009622666220317090552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 12/14/2021] [Accepted: 12/21/2021] [Indexed: 02/08/2023]
Abstract
Mucin 1 (MUC 1) is a highly glycosylated tumor-associated antigen (TAA) overexpressed in hepatocellular carcinoma (HCC). This protein plays a critical role in various immune-mediated signaling pathways at its transcriptional and post-transcriptional levels, leading to immune evasion and metastasis in HCC. HCC cells maintain an immune-suppressive environment with the help of immunesuppressive tumor-associated antigens, resulting in a metastatic spread of the disease. The development of intense immunotherapeutic strategies to target tumor-associated antigen is critical to overcoming the progression of HCC. MUC 1 remains the most recognized tumor-associated antigen since its discovery over 30 years ago. A few promising immunotherapies targeting MUC 1 are currently under clinical trials, including CAR-T and CAR-pNK-mediated therapies. This review highlights the biosynthesis, significance, and clinical implication of MUC 1 as an immune target in HCC.
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Affiliation(s)
- Ayana R Kumar
- Department of Pharmacognosy, Amrita School of Pharmacy, Amrita Vishwa Vidyapeetham, AIMS Health Science Campus, Kochi-682041, Kerala, India
| | - Aswathy R Devan
- Department of Pharmacognosy, Amrita School of Pharmacy, Amrita Vishwa Vidyapeetham, AIMS Health Science Campus, Kochi-682041, Kerala, India
| | - Bhagyalakshmi Nair
- Department of Pharmacognosy, Amrita School of Pharmacy, Amrita Vishwa Vidyapeetham, AIMS Health Science Campus, Kochi-682041, Kerala, India
| | | | - Lekshmi R Nath
- Department of Pharmacognosy, Amrita School of Pharmacy, Amrita Vishwa Vidyapeetham, AIMS Health Science Campus, Kochi-682041, Kerala, India
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Delivering Two Tumour Antigens Survivin and Mucin-1 on Virus-Like Particles Enhances Anti-Tumour Immune Responses. Vaccines (Basel) 2021; 9:vaccines9050463. [PMID: 34066318 PMCID: PMC8148150 DOI: 10.3390/vaccines9050463] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 04/29/2021] [Accepted: 04/30/2021] [Indexed: 11/20/2022] Open
Abstract
Breast cancer (BC) is the most frequently diagnosed cancer in women, with many patients experiencing recurrence following treatment. Antigens delivered on virus-like particles (VLPs) induce a targeted immune response and here we investigated whether the co-delivery of multiple antigens could induce a superior anti-cancer response for BC immunotherapy. VLPs were designed to recombinantly express murine survivin and conjugated with an aberrantly glycosylated mucin-1 (MUC1) peptide using an intracellular cleavable bis-arylhydrazone linker. Western blotting, electron microscopy and UV absorption confirmed survivin-VLP expression and MUC1 conjugation. To assess the therapeutic efficacy of VLPs, orthotopic BC tumours were established by injecting C57mg.MUC1 cells into the mammary fat pad of mice, which were then vaccinated with surv.VLP-SS-MUC1 or VLP controls. While wild-type mice vaccinated with surv.VLP-SS-MUC1 showed enhanced survival compared to VLPs delivering either antigen alone, MUC1 transgenic mice vaccinated with surv.VLP-SS-MUC1 showed no enhanced survival compared to controls. Hence, while co-delivery of two tumour antigens on VLPs can induce a superior anti-tumour immune response compared to the delivery of single antigens, additional strategies must be employed to break tolerance when targeted tumour antigens are expressed as endogenous self-proteins. Using VLPs for the delivery of multiple antigens represents a promising approach to improving BC immunotherapy, and has the potential to be an integral part of combination therapy in the future.
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7
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Brockhausen I, Melamed J. Mucins as anti-cancer targets: perspectives of the glycobiologist. Glycoconj J 2021; 38:459-474. [PMID: 33704667 DOI: 10.1007/s10719-021-09986-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 02/22/2021] [Accepted: 02/26/2021] [Indexed: 12/11/2022]
Abstract
Mucins are highly O-glycosylated glycoproteins that carry a heterogenous variety of O-glycan structures. Tumor cells tend to overexpress specific mucins, such as the cell surface mucins MUC1 and MUC4 that are engaged in signaling and cell growth, and exhibit abnormal glycosylation. In particular, the Tn and T antigens and their sialylated forms are common in cancer mucins. We review herein methods chosen to use cancer-associated glycans and mucins as targets for the design of anti-cancer immunotherapies. Mucin peptides from the glycosylated and transmembrane domains have been combined with immune-stimulating adjuvants in a wide variety of approaches to produce anti-tumor antibodies and vaccines. These mucin conjugates have been tested on cancer cells in vitro and in mice with significant successes in stimulating anti-tumor responses. The clinical trials in humans, however, have shown limited success in extending survival. It seems critical that the individual-specific epitope expression of cancer mucins is considered in future therapies to result in lasting anti-tumor responses.
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Affiliation(s)
- Inka Brockhausen
- Biomedical and Molecular Sciences, Queen's University, 18 Stuart St, Kingston, ON, K7L 3N6, Canada.
| | - Jacob Melamed
- Biomedical and Molecular Sciences, Queen's University, 18 Stuart St, Kingston, ON, K7L 3N6, Canada
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8
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Abstract
Personalized cancer vaccines (PCVs) are reinvigorating vaccine strategies in cancer immunotherapy. In contrast to adoptive T-cell therapy and checkpoint blockade, the PCV strategy modulates the innate and adaptive immune systems with broader activation to redeploy antitumor immunity with individualized tumor-specific antigens (neoantigens). Following a sequential scheme of tumor biopsy, mutation analysis, and epitope prediction, the administration of neoantigens with synthetic long peptide (SLP) or mRNA formulations dramatically improves the population and activity of antigen-specific CD4+ and CD8+ T cells. Despite the promising prospect of PCVs, there is still great potential for optimizing prevaccination procedures and vaccine potency. In particular, the arduous development of tumor-associated antigen (TAA)-based vaccines provides valuable experience and rational principles for augmenting vaccine potency which is expected to advance PCV through the design of adjuvants, delivery systems, and immunosuppressive tumor microenvironment (TME) reversion since current personalized vaccination simply admixes antigens with adjuvants. Considering the broader application of TAA-based vaccine design, these two strategies complement each other and can lead to both personalized and universal therapeutic methods. Chemical strategies provide vast opportunities for (1) exploring novel adjuvants, including synthetic molecules and materials with optimizable activity, (2) constructing efficient and precise delivery systems to avoid systemic diffusion, improve biosafety, target secondary lymphoid organs, and enhance antigen presentation, and (3) combining bioengineering methods to innovate improvements in conventional vaccination, "smartly" re-educate the TME, and modulate antitumor immunity. As chemical strategies have proven versatility, reliability, and universality in the design of T cell- and B cell-based antitumor vaccines, the union of such numerous chemical methods in vaccine construction is expected to provide new vigor and vitality in cancer treatment.
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Affiliation(s)
- Wen-Hao Li
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, 100084 Beijing, China
| | - Yan-Mei Li
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, 100084 Beijing, China.,Beijing Institute for Brain Disorders, 100069 Beijing, China.,Center for Synthetic and Systems Biology, Tsinghua University, 100084 Beijing, China
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9
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Synthesis and Immunological Evaluation of a Single Molecular Construct MUC1 Vaccine Containing l-Rhamnose Repeating Units. Molecules 2020; 25:molecules25143137. [PMID: 32659971 PMCID: PMC7397004 DOI: 10.3390/molecules25143137] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 07/03/2020] [Accepted: 07/05/2020] [Indexed: 11/24/2022] Open
Abstract
A rhamnose targeting strategy for generating effective anticancer vaccines was successful in our previous studies. We showed that by utilizing natural anti-rhamnose antibodies, a rhamnose-containing vaccine can be targeted to antigen-presenting cells, such as dendritic cells. In this case, rhamnose (Rha) was linked directly to the liposomes bearing the antigen. However, in the current approach, we conjugated a multivalent Tri-Rha ligand with the antigen itself, making it a single component vaccine construct, unlike the previous two-component vaccine construct where Rha cholesterol and Mucin1 (MUC1) antigen were both linked separately to the liposomes. Synthesis required the development of a linker for coupling of the Rha-Ser residues. We compared those two systems in a mouse model and found increased production of anti-MUC1 antibodies and more primed antigen-specific CD4+ T cells in both of the targeted approaches when compared to the control group, suggesting that this one-component vaccine construct could be a potential design used in our MUC1 targeting mechanisms.
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10
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Fernandes E, Sores J, Cotton S, Peixoto A, Ferreira D, Freitas R, Reis CA, Santos LL, Ferreira JA. Esophageal, gastric and colorectal cancers: Looking beyond classical serological biomarkers towards glycoproteomics-assisted precision oncology. Am J Cancer Res 2020; 10:4903-4928. [PMID: 32308758 PMCID: PMC7163443 DOI: 10.7150/thno.42480] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Accepted: 01/16/2020] [Indexed: 12/24/2022] Open
Abstract
Esophageal (OC), gastric (GC) and colorectal (CRC) cancers are amongst the digestive track tumors with higher incidence and mortality due to significant molecular heterogeneity. This constitutes a major challenge for patients' management at different levels, including non-invasive detection of the disease, prognostication, therapy selection, patient's follow-up and the introduction of improved and safer therapeutics. Nevertheless, important milestones have been accomplished pursuing the goal of molecular-based precision oncology. Over the past five years, high-throughput technologies have been used to interrogate tumors of distinct clinicopathological natures, generating large-scale biological datasets (e.g. genomics, transcriptomics, and proteomics). As a result, GC and CRC molecular subtypes have been established to assist patient stratification in the clinical settings. However, such molecular panels still require refinement and are yet to provide targetable biomarkers. In parallel, outstanding advances have been made regarding targeted therapeutics and immunotherapy, paving the way for improved patient care; nevertheless, important milestones towards treatment personalization and reduced off-target effects are also to be accomplished. Exploiting the cancer glycoproteome for unique molecular fingerprints generated by dramatic alterations in protein glycosylation may provide the necessary molecular rationale towards this end. Therefore, this review presents functional and clinical evidences supporting a reinvestigation of classical serological glycan biomarkers such as sialyl-Tn (STn) and sialyl-Lewis A (SLeA) antigens from a tumor glycoproteomics perspective. We anticipate that these glycobiomarkers that have so far been employed in non-invasive cancer prognostication may hold unexplored value for patients' management in precision oncology settings.
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Yu K, Rohr J, Liu Y, Li M, Xu J, Wang K, Chai J, Zhao D, Liu Y, Ma J, Fan L, Wang Z, Guo S. Progress in triple negative breast carcinoma pathophysiology: Potential therapeutic targets. Pathol Res Pract 2020; 216:152874. [PMID: 32088086 DOI: 10.1016/j.prp.2020.152874] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 01/17/2020] [Accepted: 02/11/2020] [Indexed: 12/17/2022]
Abstract
Triple-negative breast carcinoma (TNBC) is a subtype of breast carcinoma defined by negativity for estrogen receptor (ER) or progesterone receptor (PR) by immunohistochemical analysis and negativity for human epidermal growth factor receptor (Her2) by immunohistochemistry or in situ hybridization. TNBC is clinically marked by its high aggressiveness, particularly poor outcomes including a low survival rate, and the lack of specific and effective treatments. Therefore, new potential targets for the treatment of TNBC must be identified. This review summarizes recent evidence supporting novel targets and possible therapeutic regimens in the treatment of TNBC.
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Affiliation(s)
- Kangjie Yu
- State Key Laboratory of Tumor Biology, Department of Pathology, Xi Jing Hospital, the Fourth Military Medical University, Xi'an, Shaan Xi Province,710032, China
| | - Joseph Rohr
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Yang Liu
- State Key Laboratory of Tumor Biology, Department of Pathology, Xi Jing Hospital, the Fourth Military Medical University, Xi'an, Shaan Xi Province,710032, China
| | - Mingyang Li
- State Key Laboratory of Tumor Biology, Department of Pathology, Xi Jing Hospital, the Fourth Military Medical University, Xi'an, Shaan Xi Province,710032, China
| | - Junpeng Xu
- State Key Laboratory of Tumor Biology, Department of Pathology, Xi Jing Hospital, the Fourth Military Medical University, Xi'an, Shaan Xi Province,710032, China
| | - Kaijing Wang
- State Key Laboratory of Tumor Biology, Department of Pathology, Xi Jing Hospital, the Fourth Military Medical University, Xi'an, Shaan Xi Province,710032, China
| | - Jia Chai
- State Key Laboratory of Tumor Biology, Department of Pathology, Xi Jing Hospital, the Fourth Military Medical University, Xi'an, Shaan Xi Province,710032, China
| | - Danhui Zhao
- State Key Laboratory of Tumor Biology, Department of Pathology, Xi Jing Hospital, the Fourth Military Medical University, Xi'an, Shaan Xi Province,710032, China
| | - Yixiong Liu
- State Key Laboratory of Tumor Biology, Department of Pathology, Xi Jing Hospital, the Fourth Military Medical University, Xi'an, Shaan Xi Province,710032, China
| | - Jing Ma
- State Key Laboratory of Tumor Biology, Department of Pathology, Xi Jing Hospital, the Fourth Military Medical University, Xi'an, Shaan Xi Province,710032, China
| | - Linni Fan
- State Key Laboratory of Tumor Biology, Department of Pathology, Xi Jing Hospital, the Fourth Military Medical University, Xi'an, Shaan Xi Province,710032, China
| | - Zhe Wang
- State Key Laboratory of Tumor Biology, Department of Pathology, Xi Jing Hospital, the Fourth Military Medical University, Xi'an, Shaan Xi Province,710032, China.
| | - Shuangping Guo
- State Key Laboratory of Tumor Biology, Department of Pathology, Xi Jing Hospital, the Fourth Military Medical University, Xi'an, Shaan Xi Province,710032, China.
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12
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Marqvorsen MHS, Araman C, van Kasteren SI. Going Native: Synthesis of Glycoproteins and Glycopeptides via Native Linkages To Study Glycan-Specific Roles in the Immune System. Bioconjug Chem 2019; 30:2715-2726. [PMID: 31580646 PMCID: PMC6873266 DOI: 10.1021/acs.bioconjchem.9b00588] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 09/30/2019] [Indexed: 12/16/2022]
Abstract
Glycosylation plays a myriad of roles in the immune system: Certain glycans can interact with specific immune receptors to kickstart a pro-inflammatory response, whereas other glycans can do precisely the opposite and ameliorate the immune response. Specific glycans and glycoforms can themselves become the targets of the adaptive immune system, leading to potent antiglycan responses that can lead to the killing of altered self- or pathogenic species. This hydra-like set of roles glycans play is of particular importance in cancer immunity, where it influences the anticancer immune response, likely playing pivotal roles in tumor survival or clearance. The complexity of carbohydrate biology requires synthetic access to glycoproteins and glycopeptides that harbor homogeneous glycans allowing the probing of these systems with high precision. One particular complicating factor in this is that these synthetic structures are required to be as close to the native structures as possible, as non-native linkages can themselves elicit immune responses. In this Review, we discuss examples and current strategies for the synthesis of natively linked single glycoforms of peptides and proteins that have enabled researchers to gain new insights into glycoimmunology, with a particular focus on the application of these reagents in cancer immunology.
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Affiliation(s)
- Mikkel H. S. Marqvorsen
- Leiden
Institute of Chemistry, Institute for Chemical Immunology Gorlaeus
Laboratories, Leiden University, Einsteinweg 55, 2333 CC, Leiden, The Netherlands
| | - Can Araman
- Leiden
Institute of Chemistry, Institute for Chemical Immunology Gorlaeus
Laboratories, Leiden University, Einsteinweg 55, 2333 CC, Leiden, The Netherlands
| | - Sander I. van Kasteren
- Leiden
Institute of Chemistry, Institute for Chemical Immunology Gorlaeus
Laboratories, Leiden University, Einsteinweg 55, 2333 CC, Leiden, The Netherlands
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13
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Burke EE, Kodumudi K, Ramamoorthi G, Czerniecki BJ. Vaccine Therapies for Breast Cancer. Surg Oncol Clin N Am 2019; 28:353-367. [DOI: 10.1016/j.soc.2019.02.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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14
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Use of Dendritic Cell Receptors as Targets for Enhancing Anti-Cancer Immune Responses. Cancers (Basel) 2019; 11:cancers11030418. [PMID: 30909630 PMCID: PMC6469018 DOI: 10.3390/cancers11030418] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 03/19/2019] [Indexed: 12/15/2022] Open
Abstract
A successful anti-cancer vaccine construct depends on its ability to induce humoral and cellular immunity against a specific antigen. Targeting receptors of dendritic cells to promote the loading of cancer antigen through an antibody-mediated antigen uptake mechanism is a promising strategy in cancer immunotherapy. Researchers have been targeting different dendritic cell receptors such as Fc receptors (FcR), various C-type lectin-like receptors such as dendritic and thymic epithelial cell-205 (DEC-205), dendritic cell-specific intercellular adhesion molecule-3-grabbing non-integrin (DC-SIGN), and Dectin-1 to enhance the uptake process and subsequent presentation of antigen to T cells through major histocompatibility complex (MHC) molecules. In this review, we compare different subtypes of dendritic cells, current knowledge on some important receptors of dendritic cells, and recent articles on targeting those receptors for anti-cancer immune responses in mouse models.
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15
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Compañón I, Guerreiro A, Mangini V, Castro-López J, Escudero-Casao M, Avenoza A, Busto JH, Castillón S, Jiménez-Barbero J, Asensio JL, Jiménez-Osés G, Boutureira O, Peregrina JM, Hurtado-Guerrero R, Fiammengo R, Bernardes GJL, Corzana F. Structure-Based Design of Potent Tumor-Associated Antigens: Modulation of Peptide Presentation by Single-Atom O/S or O/Se Substitutions at the Glycosidic Linkage. J Am Chem Soc 2019; 141:4063-4072. [PMID: 30726084 DOI: 10.1021/jacs.8b13503] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
GalNAc-glycopeptides derived from mucin MUC1 are an important class of tumor-associated antigens. α- O-glycosylation forces the peptide to adopt an extended conformation in solution, which is far from the structure observed in complexes with a model anti-MUC1 antibody. Herein, we propose a new strategy for designing potent antigen mimics based on modulating peptide/carbohydrate interactions by means of O → S/Se replacement at the glycosidic linkage. These minimal chemical modifications bring about two key structural changes to the glycopeptide. They increase the carbohydrate-peptide distance and change the orientation and dynamics of the glycosidic linkage. As a result, the peptide acquires a preorganized and optimal structure suited for antibody binding. Accordingly, these new glycopeptides display improved binding toward a representative anti-MUC1 antibody relative to the native antigens. To prove the potential of these glycopeptides as tumor-associated MUC1 antigen mimics, the derivative bearing the S-glycosidic linkage was conjugated to gold nanoparticles and tested as an immunogenic formulation in mice without any adjuvant, which resulted in a significant humoral immune response. Importantly, the mice antisera recognize cancer cells in biopsies of breast cancer patients with high selectivity. This finding demonstrates that the antibodies elicited against the mimetic antigen indeed recognize the naturally occurring antigen in its physiological context. Clinically, the exploitation of tumor-associated antigen mimics may contribute to the development of cancer vaccines and to the improvement of cancer diagnosis based on anti-MUC1 antibodies. The methodology presented here is of general interest for applications because it may be extended to modulate the affinity of biologically relevant glycopeptides toward their receptors.
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Affiliation(s)
- Ismael Compañón
- Departamento de Química , Universidad de La Rioja , Centro de Investigación en Síntesis Química , 26006 Logroño , Spain
| | - Ana Guerreiro
- Instituto de Medicina Molecular, Faculdade de Medicina , Universidade de Lisboa , Avenida Professor Egas Moniz , 1649-028 Lisboa , Portugal
| | - Vincenzo Mangini
- Center for Biomolecular Nanotechnologies@UniLe , Istituto Italiano di Tecnologia (IIT) , 73010 Arnesano , Lecce , Italy
| | - Jorge Castro-López
- Institute of Biocomputation and Physics of Complex Systems (BIFI) , University of Zaragoza , BIFI-IQFR (CSIC), Fundación ARAID , 50018 Zaragoza , Spain
| | - Margarita Escudero-Casao
- Departament de Química Analítica i Química Orgànica, Facultat de Química , Universitat Rovira i Virgili , 43007 Tarragona , Spain
| | - Alberto Avenoza
- Departamento de Química , Universidad de La Rioja , Centro de Investigación en Síntesis Química , 26006 Logroño , Spain
| | - Jesús H Busto
- Departamento de Química , Universidad de La Rioja , Centro de Investigación en Síntesis Química , 26006 Logroño , Spain
| | - Sergio Castillón
- Departament de Química Analítica i Química Orgànica, Facultat de Química , Universitat Rovira i Virgili , 43007 Tarragona , Spain
| | - Jesús Jiménez-Barbero
- CIC bioGUNE , Bizkaia Technology Park , Building 801A , 48170 Derio , Spain.,Ikerbasque , Basque Foundation for Science , Maria Diaz de Haro 13 , 48009 Bilbao , Spain.,Department of Organic Chemistry II, Faculty of Science & Technology , University of the Basque Country , 48940 Leioa , Spain
| | - Juan L Asensio
- Instituto de Química Orgánica General , IQOG-CSIC , 28006 Madrid , Spain
| | - Gonzalo Jiménez-Osés
- Departamento de Química , Universidad de La Rioja , Centro de Investigación en Síntesis Química , 26006 Logroño , Spain.,CIC bioGUNE , Bizkaia Technology Park , Building 801A , 48170 Derio , Spain
| | - Omar Boutureira
- Departament de Química Analítica i Química Orgànica, Facultat de Química , Universitat Rovira i Virgili , 43007 Tarragona , Spain
| | - Jesús M Peregrina
- Departamento de Química , Universidad de La Rioja , Centro de Investigación en Síntesis Química , 26006 Logroño , Spain
| | - Ramón Hurtado-Guerrero
- Institute of Biocomputation and Physics of Complex Systems (BIFI) , University of Zaragoza , BIFI-IQFR (CSIC), Fundación ARAID , 50018 Zaragoza , Spain
| | - Roberto Fiammengo
- Center for Biomolecular Nanotechnologies@UniLe , Istituto Italiano di Tecnologia (IIT) , 73010 Arnesano , Lecce , Italy
| | - Gonçalo J L Bernardes
- Instituto de Medicina Molecular, Faculdade de Medicina , Universidade de Lisboa , Avenida Professor Egas Moniz , 1649-028 Lisboa , Portugal.,Department of Chemistry , University of Cambridge , Lensfield Road , CB2 1EW Cambridge , U.K
| | - Francisco Corzana
- Departamento de Química , Universidad de La Rioja , Centro de Investigación en Síntesis Química , 26006 Logroño , Spain
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16
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Escher TE, Lui AJ, Geanes ES, Walter KR, Tawfik O, Hagan CR, Lewis-Wambi J. Interaction Between MUC1 and STAT1 Drives IFITM1 Overexpression in Aromatase Inhibitor-Resistant Breast Cancer Cells and Mediates Estrogen-Induced Apoptosis. Mol Cancer Res 2019; 17:1180-1194. [PMID: 30655323 DOI: 10.1158/1541-7786.mcr-18-0916] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 11/30/2018] [Accepted: 01/03/2019] [Indexed: 12/19/2022]
Abstract
The human oncoprotein, mucin 1 (MUC1), drives tumorigenesis in breast carcinomas by promoting epithelial-to-mesenchymal transition (EMT), epigenetic reprogramming, and evasion of immune response. MUC1 interacts with STAT1, through JAK/STAT signaling, and stimulates transcription of IFN-stimulated genes, specifically IFN-induced transmembrane protein 1 (IFITM1). Our laboratory has previously shown that IFITM1 overexpression in aromatase inhibitor (AI)-resistant breast cancer cells promotes aggressiveness. Here, we demonstrate that differential regulation of MUC1 in AI-sensitive (MCF-7 and T-47D) compared with AI-resistant (MCF-7:5C) cells is critical in mediating IFITM1 expression. A tumor microarray of 94 estrogen receptor-positive human breast tumors correlated coexpression of MUC1 and IFITM1 with poor recurrence-free survival, poor overall survival, and AI-resistance. In this study, we investigated the effects of MUC1/IFITM1 on cell survival and proliferation. We knocked down MUC1 levels with siRNA and pharmacologic inhibitors, which abrogated IFITM1 mRNA and protein expression and induced cell death in AI-resistant cells. In vivo, estrogen and ruxolitinib significantly reduced tumor size and decreased expression of MUC1, P-STAT1, and IFITM1. IMPLICATIONS: MUC1 and IFITM1 overexpression drives AI resistance and can be targeted with currently available therapies.Visual Overview: http://mcr.aacrjournals.org/content/molcanres/17/5/1180/F1.large.jpg.
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Affiliation(s)
- Taylor E Escher
- Department of Cancer Biology, University of Kansas Medical Center, Kansas City, Kansas
| | - Asona J Lui
- Department of Cancer Biology, University of Kansas Medical Center, Kansas City, Kansas
- Department of Physiology, University of Kansas Medical Center, Kansas City, Kansas
| | - Eric S Geanes
- Department of Cancer Biology, University of Kansas Medical Center, Kansas City, Kansas
| | - Katherine R Walter
- Department of Cancer Biology, University of Kansas Medical Center, Kansas City, Kansas
| | - Ossama Tawfik
- Department of Pathology and Laboratory Medicine, University of Kansas Medical Center, Kansas City, Kansas
| | - Christy R Hagan
- Department of Cancer Biology, University of Kansas Medical Center, Kansas City, Kansas
- Department of Biochemistry and Molecular Biology, University of Kansas Medical Center, Kansas City, Kansas
- The University of Kansas Cancer Center, Kansas City, Kansas
| | - Joan Lewis-Wambi
- Department of Cancer Biology, University of Kansas Medical Center, Kansas City, Kansas.
- Department of Physiology, University of Kansas Medical Center, Kansas City, Kansas
- The University of Kansas Cancer Center, Kansas City, Kansas
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17
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Wu X, Yin Z, McKay C, Pett C, Yu J, Schorlemer M, Gohl T, Sungsuwan S, Ramadan S, Baniel C, Allmon A, Das R, Westerlind U, Finn MG, Huang X. Protective Epitope Discovery and Design of MUC1-based Vaccine for Effective Tumor Protections in Immunotolerant Mice. J Am Chem Soc 2018; 140:16596-16609. [PMID: 30398345 DOI: 10.1021/jacs.8b08473] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Human mucin-1 (MUC1) is a highly attractive antigen for the development of anticancer vaccines. However, in human clinical trials of multiple MUC1 based vaccines, despite the generation of anti-MUC1 antibodies, the antibodies often failed to exhibit much binding to tumor presumably due to the challenges in inducing protective immune responses in the immunotolerant environment. To design effective MUC1 based vaccines functioning in immunotolerant hosts, vaccine constructs were first synthesized by covalently linking the powerful bacteriophage Qβ carrier with MUC1 glycopeptides containing 20-22 amino acid residues covering one full length of the tandem repeat region of MUC1. However, IgG antibodies elicited by these first generation constructs in tolerant human MUC1 transgenic (Tg) mice did not bind tumor cells strongly. To overcome this, a peptide array has been synthesized. By profiling binding selectivities of antibodies, the long MUC1 glycopeptide was found to contain immunodominant but nonprotective epitopes. Critical insights were obtained into the identity of the key protective epitope. Redesign of the vaccine focusing on the protective epitope led to a new Qβ-MUC1 construct, which was capable of inducing higher levels of anti-MUC1 IgG antibodies in MUC1.Tg mice to react strongly with and kill a wide range of tumor cells compared to the construct containing the gold standard protein carrier, i.e., keyhole limpet hemocyanin. Vaccination with this new Qβ-MUC1 conjugate led to significant protection of MUC1.Tg mice in both metastatic and solid tumor models. The antibodies exhibited remarkable selectivities toward human breast cancer tissues, suggesting its high translational potential.
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Affiliation(s)
| | | | - Craig McKay
- School of Chemistry & Biochemistry and School of Biological Sciences , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
| | - Christian Pett
- Leibniz-Institut für Analytische Wissenschaften-ISAS-e.V. , 44227 Dortmund , Germany.,Department of Chemistry , Umeå University , 901 87 Umeå , Sweden
| | - Jin Yu
- Leibniz-Institut für Analytische Wissenschaften-ISAS-e.V. , 44227 Dortmund , Germany
| | - Manuel Schorlemer
- Leibniz-Institut für Analytische Wissenschaften-ISAS-e.V. , 44227 Dortmund , Germany
| | - Trevor Gohl
- Department of Physiology , Michigan State University , East Lansing , Michigan 48824 , United States
| | | | - Sherif Ramadan
- Chemistry Department, Faculty of Science , Benha University , Benha , Qaliobiya 13518 , Egypt
| | | | | | - Rupali Das
- Department of Physiology , Michigan State University , East Lansing , Michigan 48824 , United States
| | - Ulrika Westerlind
- Leibniz-Institut für Analytische Wissenschaften-ISAS-e.V. , 44227 Dortmund , Germany.,Department of Chemistry , Umeå University , 901 87 Umeå , Sweden
| | - M G Finn
- School of Chemistry & Biochemistry and School of Biological Sciences , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
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18
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Yin Z, Wu X, Kaczanowska K, Sungsuwan S, Comellas Aragones M, Pett C, Yu J, Baniel C, Westerlind U, Finn M, Huang X. Antitumor Humoral and T Cell Responses by Mucin-1 Conjugates of Bacteriophage Qβ in Wild-type Mice. ACS Chem Biol 2018; 13:1668-1676. [PMID: 29782143 DOI: 10.1021/acschembio.8b00313] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Mucin-1 (MUC1) is one of the top ranked tumor associated antigens. In order to generate effective anti-MUC1 immune responses as potential anticancer vaccines, MUC1 peptides and glycopeptides have been covalently conjugated to bacteriophage Qβ. Immunization of mice with these constructs led to highly potent antibody responses with IgG titers over one million, which are among the highest anti-MUC1 IgG titers reported to date. Furthermore, the high IgG antibody levels persisted for more than six months. The constructs also elicited MUC1 specific cytotoxic T cells, which can selectively kill MUC1 positive tumor cells. The unique abilities of Qβ-MUC1 conjugates to powerfully induce both antibody and cytotoxic T cell immunity targeting tumor cells bode well for future translation of the constructs as anticancer vaccines.
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Affiliation(s)
| | | | - Katarzyna Kaczanowska
- Department of Chemistry and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, California 92037, United States
| | | | - Marta Comellas Aragones
- Department of Chemistry and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, California 92037, United States
| | - Christian Pett
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., 44227, Dortmund, Germany
- Department of Chemistry, Umeå University, 901 87 Umeå, Sweden
| | - Jin Yu
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., 44227, Dortmund, Germany
| | | | - Ulrika Westerlind
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., 44227, Dortmund, Germany
- Department of Chemistry, Umeå University, 901 87 Umeå, Sweden
| | - M.G. Finn
- Department of Chemistry and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, California 92037, United States
- School of Chemistry & Biochemistry and School of Biological Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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19
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Martínez-Sáez N, Peregrina JM, Corzana F. Principles of mucin structure: implications for the rational design of cancer vaccines derived from MUC1-glycopeptides. Chem Soc Rev 2018; 46:7154-7175. [PMID: 29022615 DOI: 10.1039/c6cs00858e] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Cancer is currently one of the world's most serious public health problems. Significant efforts are being made to develop new strategies that can eradicate tumours selectively without detrimental effects to healthy cells. One promising approach is focused on the design of vaccines that contain partially glycosylated mucins in their formulation. Although some of these vaccines are in clinical trials, a lack of knowledge about the molecular basis that governs the antigen presentation, and the interactions between antigens and the elicited antibodies has limited their success thus far. This review focuses on the most significant milestones achieved to date in the conformational analysis of tumour-associated MUC1 derivatives both in solution and bound to antibodies. The effect that the carbohydrate scaffold has on the peptide backbone structure and the role of the sugar in molecular recognition by antibodies are emphasised. The outcomes summarised in this review may be a useful guide to develop new antigens for the design of cancer vaccines in the near future.
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Affiliation(s)
- Nuria Martínez-Sáez
- Departamento de Química, Universidad de La Rioja, Centro de Investigación en Síntesis Química, 26006 Logroño, Spain.
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20
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Hafstrand I, Badia-Martinez D, Josey BJ, Norström M, Buratto J, Pellegrino S, Duru AD, Sandalova T, Achour A. Crystal structures of H-2Db in complex with the LCMV-derived peptides GP92 and GP392 explain pleiotropic effects of glycosylation on antigen presentation and immunogenicity. PLoS One 2017; 12:e0189584. [PMID: 29253009 PMCID: PMC5734757 DOI: 10.1371/journal.pone.0189584] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Accepted: 11/29/2017] [Indexed: 01/16/2023] Open
Abstract
Post-translational modifications significantly broaden the epitope repertoire for major histocompatibility class I complexes (MHC-I) and may allow viruses to escape immune recognition. Lymphocytic choriomeningitis virus (LCMV) infection of H-2b mice generates CD8+ CTL responses directed towards several MHC-I-restricted epitopes including the peptides GP92 (CSANNSHHYI) and GP392 (WLVTNGSYL), both with a N-glycosylation site. Interestingly, glycosylation has different effects on the immunogenicity and association capacity of these two epitopes to H-2Db. To assess the structural bases underlying these functional results, we determined the crystal structures of H-2Db in complex with GP92 (CSANNSHHYI) and GP392 (WLVTNGSYL) to 2.4 and 2.5 Å resolution, respectively. The structures reveal that while glycosylation of GP392 most probably impairs binding, the glycosylation of the asparagine residue in GP92, which protrudes towards the solvent, possibly allows for immune escape and/or forms a neo-epitope that may select for a different set of CD8 T cells. Altogether, the presented results provide a structural platform underlying the effects of post-translational modifications on epitope binding and/or immunogenicity, resulting in viral immune escape.
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Affiliation(s)
- Ida Hafstrand
- Science for Life Laboratory, Department of Medicine Solna, Karolinska Institutet, and Department of Infectious Diseases, Karolinska University Hospital, Solna, Stockholm, Sweden
| | - Daniel Badia-Martinez
- Science for Life Laboratory, Department of Medicine Solna, Karolinska Institutet, and Department of Infectious Diseases, Karolinska University Hospital, Solna, Stockholm, Sweden
| | - Benjamin John Josey
- NSU Cell Therapy Institute, Nova Southeastern University, Fort Lauderdale, FL, United State of America
- College of Allopathic Medicine, Nova Southeastern University, Fort Lauderdale, FL, United State of America
| | - Melissa Norström
- Science for Life Laboratory, Department of Medicine Solna, Karolinska Institutet, and Department of Infectious Diseases, Karolinska University Hospital, Solna, Stockholm, Sweden
| | - Jérémie Buratto
- Science for Life Laboratory, Department of Medicine Solna, Karolinska Institutet, and Department of Infectious Diseases, Karolinska University Hospital, Solna, Stockholm, Sweden
| | - Sara Pellegrino
- DISFARM, Dipartimento di Scienze Farmaceutiche, Sezinone Chimica Generale e Organica, Università degli Studi, Milano, Italy
| | - Adil Doganay Duru
- NSU Cell Therapy Institute, Nova Southeastern University, Fort Lauderdale, FL, United State of America
- College of Allopathic Medicine, Nova Southeastern University, Fort Lauderdale, FL, United State of America
| | - Tatyana Sandalova
- Science for Life Laboratory, Department of Medicine Solna, Karolinska Institutet, and Department of Infectious Diseases, Karolinska University Hospital, Solna, Stockholm, Sweden
| | - Adnane Achour
- Science for Life Laboratory, Department of Medicine Solna, Karolinska Institutet, and Department of Infectious Diseases, Karolinska University Hospital, Solna, Stockholm, Sweden
- * E-mail:
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21
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Shajahan A, Supekar NT, Heiss C, Ishihara M, Azadi P. Tool for Rapid Analysis of Glycopeptide by Permethylation via One-Pot Site Mapping and Glycan Analysis. Anal Chem 2017; 89:10734-10743. [PMID: 28921966 PMCID: PMC5973789 DOI: 10.1021/acs.analchem.7b01730] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
To overcome the challenges in the analysis of protein glycosylation, we have developed a comprehensive and universal tool through permethylation of glycopeptides and their tandem mass spectrometric analysis. This method has the potential to simplify glycoprotein analysis by integrating glycan sequencing and glycopeptide analysis in a single experiment. Moreover, glycans with unique glycosidic linkages, particularly from prokaryotes, which are resistant to enzymatic or chemical release, could also be detected and analyzed by this methodology. Here we present a strategy for the permethylation of intact glycopeptides, obtained via controlled protease digest, and their characterization by using advanced mass spectrometry. We used bovine RNase B, human transferrin, and bovine fetuin as models to demonstrate the feasibility of the method. Remarkably, the glycan patterns, glycosylation site, and their occupancy by N-glycans are all detected and identified in a single experimental procedure. Acquisition on a high resolution tandem-MSn system with fragmentation methodologies such as high-energy collision dissociation (HCD) and collision induced dissociation (CID), provided the complete sequence of the glycan structures attached to the peptides. The behavior of 20 natural amino acids under the basic permethylation conditions was probed by permethylating a library of short synthetic peptides. Our studies indicate that the permethylation imparts simple, limited, and predictable chemical transformations on peptides and do not interfere with the interpretation of MS/MS data. In addition to this, permethylated O-glycans in unreduced form (released by β elimination) were also detected, allowing us to profile O-linked glycan structures simultaneously.
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Affiliation(s)
- Asif Shajahan
- Complex Carbohydrate Research Center, The University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
| | - Nitin T. Supekar
- Complex Carbohydrate Research Center, The University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
| | - Christian Heiss
- Complex Carbohydrate Research Center, The University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
| | - Mayumi Ishihara
- Complex Carbohydrate Research Center, The University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
| | - Parastoo Azadi
- Complex Carbohydrate Research Center, The University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
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22
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Nabavinia MS, Gholoobi A, Charbgoo F, Nabavinia M, Ramezani M, Abnous K. Anti-MUC1 aptamer: A potential opportunity for cancer treatment. Med Res Rev 2017; 37:1518-1539. [PMID: 28759115 DOI: 10.1002/med.21462] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 06/19/2017] [Accepted: 06/30/2017] [Indexed: 01/10/2023]
Abstract
Mucin 1 (MUC1) is a protein usually found on the apical surface of most normal secretory epithelial cells. However, in most adenocarcinomas, MUC1 is overexpressed, so that it not only appears over the entire cell surface, but is also shed as MUC1 fragments into the blood stream. These phenomena pinpoint MUC1 as a potential target for the diagnosis and treatment of cancer; consequently, interest has increased in MUC1 as a molecular target for overcoming cancer therapy challenges. MUC1 currently ranks second among 75 antigen candidates for cancer vaccines, and different antibodies or aptamers against MUC1 protein are proving useful for tracing cancer cells in the emerging field of targeted delivery. The unique properties of MUC1 aptamers as novel targeting agents, and the revolutionary role that MUC1 now plays in cancer therapy, are the focus of this review. Recent advancements in MUC1-targeted cancer therapy are also assessed.
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Affiliation(s)
- Maryam Sadat Nabavinia
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Aida Gholoobi
- Department of Modern Sciences and Technologies, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Fahimeh Charbgoo
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.,Pharmaceutical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | | | - Mohammad Ramezani
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.,Nanotechnology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Khalil Abnous
- Pharmaceutical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Medicinal Chemistry, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
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23
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Pathangey LB, McCurry DB, Gendler SJ, Dominguez AL, Gorman JE, Pathangey G, Mihalik LA, Dang Y, Disis ML, Cohen PA. Surrogate in vitro activation of innate immunity synergizes with interleukin-7 to unleash rapid antigen-driven outgrowth of CD4+ and CD8+ human peripheral blood T-cells naturally recognizing MUC1, HER2/neu and other tumor-associated antigens. Oncotarget 2017; 8:10785-10808. [PMID: 27974697 PMCID: PMC5355224 DOI: 10.18632/oncotarget.13911] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Accepted: 11/23/2016] [Indexed: 01/21/2023] Open
Abstract
Effective adoptive immunotherapy has proved elusive for many types of human cancer, often due to difficulties achieving robust expansion of natural tumor-specific T-cells from peripheral blood. We hypothesized that antigen-driven T-cell expansion might best be triggered in vitro by acute activation of innate immunity to mimic a life-threatening infection. Unfractionated peripheral blood mononuclear cells (PBMC) were subjected to a two-step culture, first synchronizing their exposure to exogenous antigens with aggressive surrogate activation of innate immunity, followed by γ-chain cytokine-modulated T-cell hyperexpansion. Step 1 exposure to GM-CSF plus paired Toll-like receptor agonists (resiquimod and LPS), stimulated abundant IL-12 and IL-23 secretion, as well as upregulated co-stimulatory molecules and CD11c expression within the myeloid (CD33+) subpopulation. Added synthetic long peptides (>20aa) derived from widely expressed oncoproteins (MUC1, HER2/neu and CMVpp65), were reliably presented to CD4+ T-cells and cross-presented to CD8+ T-cells. Both presentation and cross-presentation demonstrated proteasomal and Sec61 dependence that could bypass the endoplasmic reticulum. Step 2 exposure to exogenous IL-7 or IL-7+IL-2 produced selective and sustained expansion of both CD4+ and CD8+ peptide-specific T-cells with a predominant interferon-γ-producing T1-type, as well as the antigen-specific ability to lyse tumor targets. Other γ-chain cytokines and/or combinations were initially proliferogenic, but followed by a contractile phase not observed with IL-7 or IL-7+IL-2. Regulatory T-cells were minimally propagated under these culture conditions. This mechanistically rational culture sequence, effective even for unvaccinated donors, enables rapid preparation of T-cells recognizing tumor-associated antigens expressed by the majority of human cancers, including pancreatic cancers, breast cancers and glioblastomas.
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Affiliation(s)
- Latha B Pathangey
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Scottsdale, AZ, USA
| | - Dustin B McCurry
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Scottsdale, AZ, USA
| | - Sandra J Gendler
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Scottsdale, AZ, USA.,Department of Immunology, Mayo Clinic, Scottsdale, AZ, USA.,Department of Hematology and Oncology, Mayo Clinic, Scottsdale, AZ, USA
| | - Ana L Dominguez
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Scottsdale, AZ, USA
| | - Jessica E Gorman
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Scottsdale, AZ, USA
| | - Girish Pathangey
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Scottsdale, AZ, USA
| | - Laurie A Mihalik
- Department of Hematology and Oncology, Mayo Clinic, Scottsdale, AZ, USA
| | - Yushe Dang
- Tumor Vaccine Group, Center for Translational Medicine in Women's Health, University of Washington, Seattle, WA, USA
| | - Mary L Disis
- Tumor Vaccine Group, Center for Translational Medicine in Women's Health, University of Washington, Seattle, WA, USA
| | - Peter A Cohen
- Department of Immunology, Mayo Clinic, Scottsdale, AZ, USA.,Department of Hematology and Oncology, Mayo Clinic, Scottsdale, AZ, USA
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24
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Scheikl-Gatard T, Tosch C, Lemonnier F, Rooke R. Identification of new MUC1 epitopes using HLA-transgenic animals: implication for immunomonitoring. J Transl Med 2017; 15:154. [PMID: 28679396 PMCID: PMC5499006 DOI: 10.1186/s12967-017-1254-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2017] [Accepted: 06/24/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The success of immunotherapeutics in oncology and the search for further improvements has prompted revisiting the use of cancer vaccines. In this context, knowledge of the immunogenic epitopes and the monitoring of the immune response cancer vaccines generate are essential. MUC1 has been considered one of the most important tumor associated antigen for decades. METHODS To identify HLA-restricted MUC1 peptides we used eight human MHC class I transgenic mouse lines, together covering more than 80% of the human population. MUC1 peptides were identified by vaccinating each line with full length MUC1 coding sequences and using an IFNγ ELIspot restimulation assay. Relevant peptides were tested in a flow cytometry-based tetramer assay and for their capacity to serve as target in an in vivo killing assay. RESULTS Four previously identified MUC1 peptides were confirmed and five are described here for the first time. These nine peptide-MHC combinations were further characterized. Six gave above-background tetramer staining of splenocytes from immunized animals and three peptides were induced more than 5% specific in vivo killing. CONCLUSIONS These data describe for the first time five new HLA class I-restricted peptides and revisit some that were previously described. They also emphasize the importance of using in vivo/ex vivo models to screen for immunogenic peptides and define the functions for individual peptide-HLA combinations.
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Affiliation(s)
| | - Caroline Tosch
- Transgene SA, 400 Bld Gonthier d'Andernach, 67400, Illkirch Graffenstaden, France
| | - François Lemonnier
- Unité INSERM 1016, Département Endocrinologie, Métabolisme et Diabète. Equipe Immunologie des Diabètes, Bâtiment Cassini, 123 Bd Port Royal, 75014, Paris, France
| | - Ronald Rooke
- Institut de Recherche Servier, 125 Chemin de Ronde, 78290, Croissy, France.
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25
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Michalek J, Hezova R, Turanek-Knötigova P, Gabkova J, Strioga M, Lubitz W, Kudela P. Oncolysate-loaded Escherichia coli bacterial ghosts enhance the stimulatory capacity of human dendritic cells. Cancer Immunol Immunother 2017; 66:149-159. [PMID: 27864613 PMCID: PMC11029152 DOI: 10.1007/s00262-016-1932-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Accepted: 11/14/2016] [Indexed: 12/15/2022]
Abstract
The natural adjuvant properties of bacterial ghosts (BGs) lie within the presence of intact pathogen-associated molecular patterns on their surface. BGs can improve the direct delivery, natural processing and presentation of target antigens within dendritic cells (DCs). Moreover, sensitization of human DCs by cancer cell lysate (oncolysate)-loaded BGs in the presence of IFN-α and GM-CSF enhanced DC maturation as indicated by an increased expression of maturation markers and co-stimulatory molecules, higher production of IL-12p70 and stimulation of significantly increased proliferation of both autologous CD4+ and CD8+ T cells compared to DCs matured in the presence of purified lipopolysaccharide. The induced T cells efficiently recognized oncolysate-derived tumor-associated antigens expressed by cancer cells used for the production of oncolysate. Our optimized one-step simultaneous antigen delivery and DC maturation-inducing method emerges as a promising tool for the development and implementation of next-generation cellular cancer immunotherapies.
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Affiliation(s)
- Jaroslav Michalek
- Cellthera, s.r.o., Brno, Czech Republic
- Advanced Cell Immunotherapy Unit, Department of Pharmacology, Medical Faculty, Masaryk University, Brno, Czech Republic
- Department of Pediatrics, The University Hospital Brno, Brno, Czech Republic
| | - Renata Hezova
- Advanced Cell Immunotherapy Unit, Department of Pharmacology, Medical Faculty, Masaryk University, Brno, Czech Republic
| | - Pavlina Turanek-Knötigova
- Advanced Cell Immunotherapy Unit, Department of Pharmacology, Medical Faculty, Masaryk University, Brno, Czech Republic
- Department of Pharmacology and Immunotherapy, Veterinary Research Institute, Brno, Czech Republic
| | - Jana Gabkova
- Institute of Mathematics and Physics, Faculty of Mechanical Engineering, Slovak University of Technology, Bratislava, Slovak Republic
| | - Marius Strioga
- Department of Immunology, National Cancer Institute, Vilnius, Lithuania
| | - Werner Lubitz
- BIRD-C GmbH, Dr. Bohrgasse 2-8, 1030, Vienna, Austria
| | - Pavol Kudela
- BIRD-C GmbH, Dr. Bohrgasse 2-8, 1030, Vienna, Austria.
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26
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Kavunja HW, Lang S, Sungsuwan S, Yin Z, Huang X. Delivery of foreign cytotoxic T lymphocyte epitopes to tumor tissues for effective antitumor immunotherapy against pre-established solid tumors in mice. Cancer Immunol Immunother 2016; 66:451-460. [PMID: 28011995 DOI: 10.1007/s00262-016-1948-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Accepted: 12/18/2016] [Indexed: 11/26/2022]
Abstract
Cytotoxic T lymphocyte (CTL) can have remarkable abilities to kill tumor cells. However, the establishment of successful CTL-based anticancer therapy has met with many challenges. Within tumor cells, there exist subpopulations with low or no expression of the targeted antigen (termed as antigen-loss variants). In addition, tumor cells can downregulate the levels of major histocompatibility complex class I (MHC-I) molecules on cell surface due to immune pressure. As a result, some tumor cells can escape the immune pressure bestowed by CTLs, resulting in treatment failure. To address these difficulties, a new approach is developed to deliver foreign high-affinity CTL epitopes to tumor tissues utilizing pH-responsive "smart" microparticles (MPs). These MPs could encapsulate CTL peptide epitope, release the peptide under acidic condition encountered in tumor tissues and enhance CTL activation. Mice bearing pre-established tumor as "antigen-loss variant" solid tumor models were administered intratumorally with MPs containing the CTL peptide, which showed 100% survival following the treatment. In contrast, all control mice died from tumor. Significant protection from tumor-induced death was also observed with systemic administration of CTL peptide-MPs. The therapeutic efficacy can be attributed to enhanced delivery of the epitope to tumor tissues, presentation of the epitope by tumor cells as well as tumor stromal cells and/or generation of epitope-specific CTLs by the peptide-containing MPs. These findings offer a promising new direction for treating established solid tumor using CTL therapy.
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Affiliation(s)
- Herbert W Kavunja
- Department of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, MI, 48824, USA
| | - Shuyao Lang
- Department of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, MI, 48824, USA
| | - Suttipun Sungsuwan
- Department of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, MI, 48824, USA
| | - Zhaojun Yin
- Department of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, MI, 48824, USA
| | - Xuefei Huang
- Department of Chemistry, Michigan State University, 578 S. Shaw Lane, East Lansing, MI, 48824, USA.
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27
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De La Cruz LM, Nocera NF, Czerniecki BJ. Restoring anti-oncodriver Th1 responses with dendritic cell vaccines in HER2/neu-positive breast cancer: progress and potential. Immunotherapy 2016; 8:1219-32. [PMID: 27605070 PMCID: PMC5967360 DOI: 10.2217/imt-2016-0052] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 06/23/2016] [Indexed: 12/16/2022] Open
Abstract
HER2/neu is expressed in the majority of in situ breast cancers, but maintained in 20-30% of invasive breast cancer (IBC). During breast tumorigenesis, there is a progressive loss of anti-HER2 CD4(pos) Th1 (anti-HER2Th1) from benign to ductal carcinoma in situ, with almost complete loss in IBC. This anti-HER2Th1 response can predict response to neoadjuvant therapy, risk of recurrence and disease-free survival. Vaccines consisting of HER2-pulsed type I polarized dendritic cells (DC1) administered during ductal carcinoma in situ and early IBC can efficiently correct anti-HER2Th1 response and have clinical impact on the disease. In this review, we will discuss the role of anti-HER2Th1 response in the three phases of immunoediting during HER2 breast cancer development and opportunities for reversing these processes using DC1 vaccines alone or in combination with standard therapies. Correcting the anti-HER2Th1 response may represent an opportunity for improving outcomes and providing a path to eliminate escape variants.
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Affiliation(s)
- Lucy M De La Cruz
- Department of Endocrine & Oncologic Surgery, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Nadia F Nocera
- Department of Endocrine & Oncologic Surgery, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Brian J Czerniecki
- Department of Breast Oncology, H. Lee Moffitt Cancer Center, Tampa, FL 33617, USA
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28
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Immunological Evaluation of Recent MUC1 Glycopeptide Cancer Vaccines. Vaccines (Basel) 2016; 4:vaccines4030025. [PMID: 27472370 PMCID: PMC5041019 DOI: 10.3390/vaccines4030025] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 07/13/2016] [Accepted: 07/21/2016] [Indexed: 12/13/2022] Open
Abstract
Aberrantly glycosylated mucin 1 (MUC1) is a recognized tumor-specific antigen on epithelial cell tumors. A wide variety of MUC1 glycopeptide anti-cancer vaccines have been formulated by many research groups. Some researchers have used MUC1 alone as an immunogen whereas other groups used different antigenic carrier proteins such as bovine serum albumin or keyhole limpet hemocyanin for conjugation with MUC1 glycopeptide. A variety of adjuvants have been used with MUC1 glycopeptides to improve their immunogenicity. Fully synthetic multicomponent vaccines have been synthesized by incorporating different T helper cell epitopes and Toll-like receptor agonists. Some vaccine formulations utilized liposomes or nanoparticles as vaccine delivery systems. In this review, we discuss the immunological evaluation of different conjugate or synthetic MUC1 glycopeptide vaccines in different tumor or mouse models that have been published since 2012.
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29
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Aberrant Glycosylation of Anchor-Optimized MUC1 Peptides Can Enhance Antigen Binding Affinity and Reverse Tolerance to Cytotoxic T Lymphocytes. Biomolecules 2016; 6:biom6030031. [PMID: 27367740 PMCID: PMC5039417 DOI: 10.3390/biom6030031] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2016] [Revised: 06/07/2016] [Accepted: 06/07/2016] [Indexed: 12/22/2022] Open
Abstract
Cancer vaccines have often failed to live up to their promise, although recent results with checkpoint inhibitors are reviving hopes that they will soon fulfill their promise. Although mutation-specific vaccines are under development, there is still high interest in an off-the-shelf vaccine to a ubiquitous antigen, such as MUC1, which is aberrantly expressed on most solid and many hematological tumors, including more than 90% of breast carcinomas. Clinical trials for MUC1 have shown variable success, likely because of immunological tolerance to a self-antigen and to poor immunogenicity of tandem repeat peptides. We hypothesized that MUC1 peptides could be optimized, relying on heteroclitic optimizations of potential anchor amino acids with and without tumor-specific glycosylation of the peptides. We have identified novel MUC1 class I peptides that bind to HLA-A*0201 molecules with significantly higher affinity and function than the native MUC1 peptides. These peptides elicited CTLs from normal donors, as well as breast cancer patients, which were highly effective in killing MUC1-expressing MCF-7 breast cancer cells. Each peptide elicited lytic responses in greater than 6/8 of normal individuals and 3/3 breast cancer patients. The CTLs generated against the glycosylated-anchor modified peptides cross reacted with the native MUC1 peptide, STAPPVHNV, suggesting these analog peptides may offer substantial improvement in the design of epitope-based vaccines.
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