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Stergiou N, Urschbach M, Gabba A, Schmitt E, Kunz H, Besenius P. The Development of Vaccines from Synthetic Tumor-Associated Mucin Glycopeptides and their Glycosylation-Dependent Immune Response. CHEM REC 2021; 21:3313-3331. [PMID: 34812564 DOI: 10.1002/tcr.202100182] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 10/31/2021] [Accepted: 11/02/2021] [Indexed: 12/15/2022]
Abstract
Tumor-associated carbohydrate antigens are overexpressed as altered-self in most common epithelial cancers. Their glycosylation patterns differ from those of healthy cells, functioning as an ID for cancer cells. Scientists have been developing anti-cancer vaccines based on mucin glycopeptides, yet the interplay of delivery system, adjuvant and tumor associated MUC epitopes in the induced immune response is not well understood. The current state of the art suggests that the identity, abundancy and location of the glycans on the MUC backbone are all key parameters in the cellular and humoral response. This review shares lessons learned by us in over two decades of research in glycopeptide vaccines. By bridging synthetic chemistry and immunology, we discuss efforts in designing synthetic MUC1/4/16 vaccines and focus on the role of glycosylation patterns. We provide a brief introduction into the mechanisms of the immune system and aim to promote the development of cancer subunit vaccines.
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Affiliation(s)
- Natascha Stergiou
- Radionuclide Center, Radiology and Nuclear medicine Amsterdam UMC, VU University, De Boelelaan 1085c, 1081 HV, Amsterdam, the Netherlands
| | - Moritz Urschbach
- Department of Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
| | - Adele Gabba
- Department of Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
| | - Edgar Schmitt
- Institute of Immunology, University Medical Center Mainz, Langenbeckstr. 1, 55131, Mainz, Germany
| | - Horst Kunz
- Department of Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
| | - Pol Besenius
- Department of Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
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2
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Gao T, Cen Q, Lei H. A review on development of MUC1-based cancer vaccine. Biomed Pharmacother 2020; 132:110888. [PMID: 33113416 DOI: 10.1016/j.biopha.2020.110888] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 10/05/2020] [Accepted: 10/12/2020] [Indexed: 12/30/2022] Open
Abstract
Mucin 1 (MUC1) is a transmembrane mucin glycoprotein expressed on the surface of almost all epithelial cells. Aberrantly glycosylated MUC1 is associated with cellular transformation from a normal to malignant phenotype in human cancers. Therefore, MUC1 is the major target for the design and development of cancer vaccines. MUC1-based cancer vaccines are a promising strategy for preventing cancer progression and metastasis. This review summarizes the most significant milestones achieved to date in the development of different MUC-1-based vaccine approaches in clinical trials. Further, it provides perspectives for future research that may promote clinical advances in infection-associated cancers.
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Affiliation(s)
- Tong Gao
- College of Medicine, Southwest Jiaotong University, Chengdu 610031, China
| | - Qianhong Cen
- College of Medicine, Southwest Jiaotong University, Chengdu 610031, China
| | - Han Lei
- College of Medicine, Southwest Jiaotong University, Chengdu 610031, China.
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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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ICOSL-augmented adenoviral-based vaccination induces a bipolar Th17/Th1 T cell response against unglycosylated MUC1 antigen. Vaccine 2018; 36:6262-6269. [PMID: 30219366 DOI: 10.1016/j.vaccine.2018.09.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 07/18/2018] [Accepted: 09/07/2018] [Indexed: 01/14/2023]
Abstract
Cellular immunity established via immunotherapy holds the potential to eliminate solid tumors. Yet, cancer vaccines have failed to induce tumor-reactive T cells of sufficient quality to control disease. The inducible T cell costimulator (ICOS) pathway has been implicated in both the selective induction of immunity over tolerance as well as licensing of IL-17-polarized cellular immunity. Herein, we evaluated the ability of ICOS ligand (ICOSL) to augment the immunogenicity of adenoviral-based vaccination targeting the unglycosylated MUC1 peptide antigen. Vaccination disrupted immunotolerance in a transgenic mouse model recognizing human MUC1 as a self-antigen, inducing robust MUC1-specific immunity. Augmenting vaccination with ICOSL induced a bipolar Th17/Th1 effector profile, marked by increased MUC1-specific IL-17A production and RORγt expression in CD4+ but not CD8+ T cells which predominantly expressed IFNγ/IL-2 and T-bet. The polarization and maintenance of Th17 cells established following ICOSL augmented vaccination was highly durable, with elevated IL-17A and RORγt levels detected in CD4+ T cells up to 10 months after initial immunization. Furthermore, provision of ICOSL significantly enhanced MUC1-specific IgG antibody in response to immunization. ICOSL signaling dramatically influenced CD4+ T cell phenotype, altering gene expression of transcription factors and regulators of effector function following immunization. Interestingly, ICOSL augmentation failed to alter the transcriptional profile of CD8+ T cells following immunization, affecting the magnitude, but not distribution, of gene expression. Collectively, ICOSL supports the induction of durable, antigen-specific Th17/Th1-mediated immunity in vivo, establishing a vaccination platform to enhance CD4+ T cell-mediated antitumor immunity and providing a crucial component of an effective cancer vaccine.
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Stergiou N, Glaffig M, Jonuleit H, Schmitt E, Kunz H. Immunization with a Synthetic Human MUC1 Glycopeptide Vaccine against Tumor‐Associated MUC1 Breaks Tolerance in Human MUC1 Transgenic Mice. ChemMedChem 2017; 12:1424-1428. [DOI: 10.1002/cmdc.201700387] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Natascha Stergiou
- Johannes Gutenberg University MainzUniversity Medical Center – Institute of Immunology Langenbeckstraße 1, Building 708 55131 Mainz Germany
| | - Markus Glaffig
- Johannes Gutenberg University MainzInstitute of Organic Chemistry Duesbergweg 10–14 55128 Mainz Germany
| | - Helmut Jonuleit
- Johannes Gutenberg University MainzUniversity Medical Center – Dermatology Langenbeckstraße 1, Building 401 55116 Mainz Germany
| | - Edgar Schmitt
- Johannes Gutenberg University MainzUniversity Medical Center – Institute of Immunology Langenbeckstraße 1, Building 708 55131 Mainz Germany
| | - Horst Kunz
- Johannes Gutenberg University MainzInstitute of Organic Chemistry Duesbergweg 10–14 55128 Mainz Germany
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Pett C, Cai H, Liu J, Palitzsch B, Schorlemer M, Hartmann S, Stergiou N, Lu M, Kunz H, Schmitt E, Westerlind U. Microarray Analysis of Antibodies Induced with Synthetic Antitumor Vaccines: Specificity against Diverse Mucin Core Structures. Chemistry 2017; 23:3875-3884. [PMID: 27957769 DOI: 10.1002/chem.201603921] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Indexed: 01/08/2023]
Abstract
Glycoprotein research is pivotal for vaccine development and biomarker discovery. Many successful methodologies for reliably increasing the antigenicity toward tumor-associated glycopeptide structures have been reported. Deeper insights into the quality and specificity of the raised polyclonal, humoral reactions are often not addressed, despite the fact that an immunological memory, which produces antibodies with cross-reactivity to epitopes exposed on healthy cells, may cause autoimmune diseases. In the current work, three MUC1 antitumor vaccine candidates conjugated with different immune stimulants are evaluated immunologically. For assessment of the influence of the immune stimulant on antibody recognition, a comprehensive library of mucin 1 glycopeptides (>100 entries) is synthesized and employed in antibody microarray profiling; these range from small tumor-associated glycans (TN , STN , and T-antigen structures) to heavily extended O-glycan core structures (type-1 and type-2 elongated core 1-3 tri-, tetra-, and hexasaccharides) glycosylated in variable density at the five different sites of the MUC1 tandem repeat. This is one of the most extensive glycopeptide libraries ever made through total synthesis. On tumor cells, the core 2 β-1,6-N-acetylglucosaminyltransferase-1 (C2GlcNAcT-1) is down-regulated, resulting in lower amounts of the branched core 2 structures, which favor formation of linear core 1 or core 3 structures, and in particular, truncated tumor-associated antigen structures. The core 2 structures are commonly found on healthy cells and the elucidation of antibody cross-reactivity to such epitopes may predict the tumor-selectivity and safety of synthetic vaccines. With the extended mucin core structures in hand, antibody cross-reactivity toward the branched core 2 glycopeptide epitopes is explored. It is observed that the induced antibodies recognize MUC1 peptides with very high glycosylation site specificity. The nature of the antibody response is characteristically different for antibodies directed to glycosylation sites in either the immune-dominant PDTR or the GSTA domain. All antibody sera show high reactivity to the tumor-associated saccharide structures on MUC1. Extensive glycosylation with branched core 2 structures, typically found on healthy cells, abolishes antibody recognition of the antisera and suggests that all vaccine conjugates preferentially induce a tumor-specific humoral immune response.
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Affiliation(s)
- Christian Pett
- Gesellschaft zur Förderung der Analytischen Wissenschaften e.V. ISAS-Leibniz Institute for Analytical Sciences, Otto-Hahn-Str. 6b, 44227, Dortmund, Germany
| | - Hui Cai
- Gesellschaft zur Förderung der Analytischen Wissenschaften e.V. ISAS-Leibniz Institute for Analytical Sciences, Otto-Hahn-Str. 6b, 44227, Dortmund, Germany
| | - Jia Liu
- Institute for Virology, University Hospital of Essen, University of Duisburg-Essen, Essen, Germany
| | - Björn Palitzsch
- Institute of Organic Chemistry, Johannes Gutenberg, University of Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
| | - Manuel Schorlemer
- Gesellschaft zur Förderung der Analytischen Wissenschaften e.V. ISAS-Leibniz Institute for Analytical Sciences, Otto-Hahn-Str. 6b, 44227, Dortmund, Germany
| | - Sebastian Hartmann
- Institute of Organic Chemistry, Johannes Gutenberg, University of Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
| | - Natascha Stergiou
- University Medical Center, Institute of Immunology, Johannes Gutenberg University of Mainz, Langenbeckstr. 1, Geb. 708, 55101, Mainz, Germany
| | - Mengji Lu
- Institute for Virology, University Hospital of Essen, University of Duisburg-Essen, Essen, Germany
| | - Horst Kunz
- Institute of Organic Chemistry, Johannes Gutenberg, University of Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
| | - Edgar Schmitt
- University Medical Center, Institute of Immunology, Johannes Gutenberg University of Mainz, Langenbeckstr. 1, Geb. 708, 55101, Mainz, Germany
| | - Ulrika Westerlind
- Gesellschaft zur Förderung der Analytischen Wissenschaften e.V. ISAS-Leibniz Institute for Analytical Sciences, Otto-Hahn-Str. 6b, 44227, Dortmund, Germany
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Shi L, Cai H, Huang ZH, Sun ZY, Chen YX, Zhao YF, Kunz H, Li YM. Synthetic MUC1 Antitumor Vaccine Candidates with Varied Glycosylation Pattern BearingR/S-configured Pam3CysSerLys4. Chembiochem 2016; 17:1412-5. [DOI: 10.1002/cbic.201600206] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Lei Shi
- Key Laboratory of Bioorganic Phosphorus Chemistry and; Chemical Biology (Ministry of Education); Department of Chemistry; Tsinghua University; Beijing 100084 China
| | - Hui Cai
- Key Laboratory of Bioorganic Phosphorus Chemistry and; Chemical Biology (Ministry of Education); Department of Chemistry; Tsinghua University; Beijing 100084 China
| | - Zhi-Hua Huang
- Key Laboratory of Bioorganic Phosphorus Chemistry and; Chemical Biology (Ministry of Education); Department of Chemistry; Tsinghua University; Beijing 100084 China
| | - Zhan-Yi Sun
- Key Laboratory of Bioorganic Phosphorus Chemistry and; Chemical Biology (Ministry of Education); Department of Chemistry; Tsinghua University; Beijing 100084 China
| | - Yong-Xiang Chen
- Key Laboratory of Bioorganic Phosphorus Chemistry and; Chemical Biology (Ministry of Education); Department of Chemistry; Tsinghua University; Beijing 100084 China
| | - Yu-Fen Zhao
- Key Laboratory of Bioorganic Phosphorus Chemistry and; Chemical Biology (Ministry of Education); Department of Chemistry; Tsinghua University; Beijing 100084 China
| | - Horst Kunz
- Institute of Organic Chemistry; Johannes Gutenberg University of Mainz; Duesbergweg 10-14 55128 Mainz Germany
| | - Yan-Mei Li
- Key Laboratory of Bioorganic Phosphorus Chemistry and; Chemical Biology (Ministry of Education); Department of Chemistry; Tsinghua University; Beijing 100084 China
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Palitzsch B, Gaidzik N, Stergiou N, Stahn S, Hartmann S, Gerlitzki B, Teusch N, Flemming P, Schmitt E, Kunz H. A Synthetic Glycopeptide Vaccine for the Induction of a Monoclonal Antibody that Differentiates between Normal and Tumor Mammary Cells and Enables the Diagnosis of Human Pancreatic Cancer. Angew Chem Int Ed Engl 2016; 55:2894-8. [PMID: 26800384 DOI: 10.1002/anie.201509935] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Indexed: 11/06/2022]
Abstract
In studies within the realm of cancer immunotherapy, the synthesis of exactly specified tumor-associated glycopeptide antigens is shown to be a key strategy for obtaining a highly selective biological reagent, that is, a monoclonal antibody that completely differentiates between tumor and normal epithelial cells and specifically marks the tumor cells in pancreas tumors. Mucin MUC1, which is overexpressed in many prevalent cancers, was identified as a promising target for this strategy. Tumor-associated MUC1 differs significantly from that expressed by normal cells, in particular by altered glycosylation. Structurally defined tumor-associated MUC1 cannot be isolated from tumor cells. We synthesized MUC1-glycopeptide vaccines and analyzed their structure-activity relationships in immunizations; a monoclonal antibody that specifically distinguishes between human normal and tumor epithelial cells was thus generated.
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Affiliation(s)
- Björn Palitzsch
- Institut für Organische Chemie, Universität Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
| | - Nikola Gaidzik
- Institut für Organische Chemie, Universität Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
| | - Natascha Stergiou
- Institut für Immunologie, Universitätsmedizin der Universität Mainz, Langenbeckstrasse 1, G. 708, 55101, Mainz, Germany
| | - Sonja Stahn
- Fakultät für Naturwissenschaften, Technische Hochschule Köln, Kaiser-Wilhelm-Allee, G. E39, 51373, Leverkusen, Germany
| | - Sebastian Hartmann
- Institut für Organische Chemie, Universität Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
| | - Bastian Gerlitzki
- Institut für Immunologie, Universitätsmedizin der Universität Mainz, Langenbeckstrasse 1, G. 708, 55101, Mainz, Germany
| | - Nicole Teusch
- Fakultät für Naturwissenschaften, Technische Hochschule Köln, Kaiser-Wilhelm-Allee, G. E39, 51373, Leverkusen, Germany
| | - Peer Flemming
- Pathologisches Institut Celle, Wittinger Strasse 14, 29223, Celle, Germany
| | - Edgar Schmitt
- Institut für Immunologie, Universitätsmedizin der Universität Mainz, Langenbeckstrasse 1, G. 708, 55101, Mainz, Germany
| | - Horst Kunz
- Institut für Organische Chemie, Universität Mainz, Duesbergweg 10-14, 55128, Mainz, Germany.
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Palitzsch B, Gaidzik N, Stergiou N, Stahn S, Hartmann S, Gerlitzki B, Teusch N, Flemming P, Schmitt E, Kunz H. Ein durch eine synthetische Glycopeptid-Vakzine induzierter monoklonaler Antiköper unterscheidet normale von malignen Brustzellen und ermöglicht die Diagnose von humanen Pankreaskarzinomen. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201509935] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Björn Palitzsch
- Institut für Organische Chemie; Universität Mainz; Duesbergweg 10-14 55128 Mainz Deutschland
| | - Nikola Gaidzik
- Institut für Organische Chemie; Universität Mainz; Duesbergweg 10-14 55128 Mainz Deutschland
| | - Natascha Stergiou
- Institut für Immunologie; Universitätsmedizin der Universität Mainz; Langenbeckstraße 1, G. 708 55101 Mainz Deutschland
| | - Sonja Stahn
- Fakultät für Naturwissenschaften; Technische Hochschule Köln; Kaiser-Wilhelm-Allee, G. E39 51373 Leverkusen Deutschland
| | - Sebastian Hartmann
- Institut für Organische Chemie; Universität Mainz; Duesbergweg 10-14 55128 Mainz Deutschland
| | - Bastian Gerlitzki
- Institut für Immunologie; Universitätsmedizin der Universität Mainz; Langenbeckstraße 1, G. 708 55101 Mainz Deutschland
| | - Nicole Teusch
- Fakultät für Naturwissenschaften; Technische Hochschule Köln; Kaiser-Wilhelm-Allee, G. E39 51373 Leverkusen Deutschland
| | - Peer Flemming
- Pathologisches Institut Celle; Wittinger Straße 14 29223 Celle Deutschland
| | - Edgar Schmitt
- Institut für Immunologie; Universitätsmedizin der Universität Mainz; Langenbeckstraße 1, G. 708 55101 Mainz Deutschland
| | - Horst Kunz
- Institut für Organische Chemie; Universität Mainz; Duesbergweg 10-14 55128 Mainz Deutschland
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Buba AE, Löwe H, Kunz H. Fluorenylmethoxycarbonyl-ProtectedO-Glycosyl-N-methyl Amino Acids: Building Blocks for the Synthesis of Conformationally Tuned Glycopeptide Antigens. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500929] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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11
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Hartmann S, Nuhn L, Palitzsch B, Glaffig M, Stergiou N, Gerlitzki B, Schmitt E, Kunz H, Zentel R. CpG-loaded multifunctional cationic nanohydrogel particles as self-adjuvanting glycopeptide antitumor vaccines. Adv Healthc Mater 2015; 4:522-7. [PMID: 25327631 DOI: 10.1002/adhm.201400460] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 09/19/2014] [Indexed: 12/14/2022]
Abstract
Self-adjuvanting antitumor vaccines by multifunctional cationic nanohydrogels loaded with CpG. A conjugate consisting of tumor-associated MUC1-glycopeptide B-cell epitope and tetanus toxin T-cell epitope P2 is linked to cationic nanogels. Oligonucleotide CpG complexation enhances toll-like receptor (TLR) stimulated T-cell proliferation and rapid immune activation. This co-delivery promotes induction of specific MUC1-antibodies binding to human breast tumor cells without external adjuvant.
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Affiliation(s)
- Sebastian Hartmann
- Institute of Organic Chemistry; Johannes Gutenberg-University Mainz; Duesbergweg 10-14 55128 Mainz Germany
| | - Lutz Nuhn
- Institute of Organic Chemistry; Johannes Gutenberg-University Mainz; Duesbergweg 10-14 55128 Mainz Germany
| | - Björn Palitzsch
- Institute of Organic Chemistry; Johannes Gutenberg-University Mainz; Duesbergweg 10-14 55128 Mainz Germany
| | - Markus Glaffig
- Institute of Organic Chemistry; Johannes Gutenberg-University Mainz; Duesbergweg 10-14 55128 Mainz Germany
| | - Natascha Stergiou
- University Medical Center - Institute of Immunology; Johannes Gutenberg-University Mainz; Langenbeckstrasse 1, Geb. 708 55101 Mainz Germany
| | - Bastian Gerlitzki
- University Medical Center - Institute of Immunology; Johannes Gutenberg-University Mainz; Langenbeckstrasse 1, Geb. 708 55101 Mainz Germany
| | - Edgar Schmitt
- University Medical Center - Institute of Immunology; Johannes Gutenberg-University Mainz; Langenbeckstrasse 1, Geb. 708 55101 Mainz Germany
| | - Horst Kunz
- Institute of Organic Chemistry; Johannes Gutenberg-University Mainz; Duesbergweg 10-14 55128 Mainz Germany
| | - Rudolf Zentel
- Institute of Organic Chemistry; Johannes Gutenberg-University Mainz; Duesbergweg 10-14 55128 Mainz Germany
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12
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Palitzsch B, Glaffig M, Kunz H. Mucin Glycopeptide-Protein Conjugates - Promising Antitumor Vaccine Candidates. Isr J Chem 2015. [DOI: 10.1002/ijch.201400131] [Citation(s) in RCA: 188] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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13
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Palitzsch B, Hartmann S, Stergiou N, Glaffig M, Schmitt E, Kunz H. Eine vollsynthetische Vier-Komponenten-Antitumor-Vakzine mit einem MUC1-Glycopeptid und drei verschiedenen T-Helferzell- Epitopen. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201406843] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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14
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Palitzsch B, Hartmann S, Stergiou N, Glaffig M, Schmitt E, Kunz H. A Fully Synthetic Four-Component Antitumor Vaccine Consisting of a Mucin Glycopeptide Antigen Combined with Three Different T-Helper-Cell Epitopes. Angew Chem Int Ed Engl 2014; 53:14245-9. [DOI: 10.1002/anie.201406843] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Indexed: 11/07/2022]
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15
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Xie N, Taylor CM. Synthesis of Oligomers of β-l-Arabinofuranosides of (4R)-4-Hydroxy-l-proline Relevant to the Mugwort Pollen Allergen, Art v 1. J Org Chem 2014; 79:7459-67. [DOI: 10.1021/jo501191b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Ning Xie
- Department
of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Carol M. Taylor
- Department
of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
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16
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Glaffig M, Palitzsch B, Hartmann S, Schüll C, Nuhn L, Gerlitzki B, Schmitt E, Frey H, Kunz H. A Fully Synthetic Glycopeptide Antitumor Vaccine Based on Multiple Antigen Presentation on a Hyperbranched Polymer. Chemistry 2014; 20:4232-6. [DOI: 10.1002/chem.201400256] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Indexed: 11/07/2022]
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17
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Aydillo C, Navo CD, Busto JH, Corzana F, Zurbano MM, Avenoza A, Peregrina JM. A Double Diastereoselective Michael-Type Addition as an Entry to Conformationally Restricted Tn Antigen Mimics. J Org Chem 2013; 78:10968-77. [DOI: 10.1021/jo4019396] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Carlos Aydillo
- Departamento de Química
and Centro de Investigación en Síntesis Química, Universidad de La Rioja, 26006 Logroño, Spain
| | - Claudio D. Navo
- Departamento de Química
and Centro de Investigación en Síntesis Química, Universidad de La Rioja, 26006 Logroño, Spain
| | - Jesús H. Busto
- Departamento de Química
and Centro de Investigación en Síntesis Química, Universidad de La Rioja, 26006 Logroño, Spain
| | - Francisco Corzana
- Departamento de Química
and Centro de Investigación en Síntesis Química, Universidad de La Rioja, 26006 Logroño, Spain
| | - María M. Zurbano
- Departamento de Química
and Centro de Investigación en Síntesis Química, Universidad de La Rioja, 26006 Logroño, Spain
| | - Alberto Avenoza
- Departamento de Química
and Centro de Investigación en Síntesis Química, Universidad de La Rioja, 26006 Logroño, Spain
| | - Jesús M. Peregrina
- Departamento de Química
and Centro de Investigación en Síntesis Química, Universidad de La Rioja, 26006 Logroño, Spain
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Nuhn L, Hartmann S, Palitzsch B, Gerlitzki B, Schmitt E, Zentel R, Kunz H. Mit Glycopeptid-Antigenen und T-Zell-Epitopen verknüpfte wasserlösliche Polymere als potenzielle Antitumor-Vakzine. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201304212] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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20
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Nuhn L, Hartmann S, Palitzsch B, Gerlitzki B, Schmitt E, Zentel R, Kunz H. Water-soluble polymers coupled with glycopeptide antigens and T-cell epitopes as potential antitumor vaccines. Angew Chem Int Ed Engl 2013; 52:10652-6. [PMID: 24038824 DOI: 10.1002/anie.201304212] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Indexed: 12/29/2022]
Abstract
Highly decorated: Tumor-associated MUC1 glycopeptide and tetanus toxoid T-cell epitope P2 can be attached to water-soluble poly(N-(2-hydroxypropyl)methacrylamide) carriers by orthogonal ligation techniques. Fully synthetic vaccine A with additional nanostructure-promoting domains induced antibodies that exhibit high affinity to tumor cells.
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Affiliation(s)
- Lutz Nuhn
- Institute of Organic Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, 55128 Mainz (Germany)
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21
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Barchi JJ. Mucin-Type Glycopeptide Structure in Solution: Past, Present, and Future. Biopolymers 2013; 99:713-23. [DOI: 10.1002/bip.22313] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2013] [Accepted: 06/05/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Joseph J. Barchi
- Chemical Biology Laboratory; Center for Cancer Research, National Cancer Institute at Frederick; Frederick; MD; 21702
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22
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Cai H, Chen MS, Sun ZY, Zhao YF, Kunz H, Li YM. MUC1-Glycopeptidkonjugate mit T-Zellepitopen von Tetanus-Toxoid als vollsynthetische Antitumor-Vakzine mit Eigenverstärkungseffekt. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201300390] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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23
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Cai H, Chen MS, Sun ZY, Zhao YF, Kunz H, Li YM. Self-Adjuvanting Synthetic Antitumor Vaccines from MUC1 Glycopeptides Conjugated to T-Cell Epitopes from Tetanus Toxoid. Angew Chem Int Ed Engl 2013; 52:6106-10. [DOI: 10.1002/anie.201300390] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Revised: 02/15/2013] [Indexed: 12/15/2022]
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24
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Gaidzik N, Westerlind U, Kunz H. The development of synthetic antitumour vaccines from mucin glycopeptide antigens. Chem Soc Rev 2013; 42:4421-42. [PMID: 23440054 DOI: 10.1039/c3cs35470a] [Citation(s) in RCA: 344] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Based on important cell-biological and biochemical results concerning the structural difference between membrane glycoproteins of normal epithelial cells and epithelial tumour cells, tumour-associated glycopeptide antigens have been chemically synthesised and structurally confirmed. Glycopeptide structures of the tandem repeat sequence of mucin MUC1 of epithelial tumour cells constitute the most promising tumour-associated antigens. In order to generate a sufficient immunogenicity of these endogenous structures, usually tolerated by the immune system, these synthetic glycopeptide antigens were conjugated to immune stimulating components: in fully synthetic two-component vaccines either with T-cell peptide epitopes or with Toll-like receptor2 lipopeptide ligands or in three-component vaccines with both these stimulants. Alternatively, the synthetic glycopeptide antigens were coupled to immune stimulating carrier proteins. In particular, MUC1 glycopeptide conjugates with Tetanus toxoid proved to be efficient vaccines inducing very strong immune responses in mice. The antibodies elicited with the fully synthetic vaccines showed selective recognition of the tumour-associated glycopeptides as was shown by neutralisation and micro-array binding experiments. After booster immunisations, most of the immune responses showed the installation of an immunological memory. Immunisation with fully synthetic three-component vaccines induced immune reactions with therapeutic effects in terms of reduction of the tumour burden in mice or in killing of tumour cells in culture, while MUC1 glycopeptide-Tetanus toxoid vaccines elicited antibodies in mice which recognised tumour cells in human tumour tissues. The results achieved so far are considered to be promising for the development of an active immunisation against tumours.
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Affiliation(s)
- Nikola Gaidzik
- Johannes Gutenberg-Universität Mainz, Institut für Organische Chemiem, Duesbergweg 10-14, D-55128 Mainz, Germany
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Immune recognition of tumor-associated mucin MUC1 is achieved by a fully synthetic aberrantly glycosylated MUC1 tripartite vaccine. Proc Natl Acad Sci U S A 2011; 109:261-6. [PMID: 22171012 DOI: 10.1073/pnas.1115166109] [Citation(s) in RCA: 437] [Impact Index Per Article: 33.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The mucin MUC1 is typically aberrantly glycosylated by epithelial cancer cells manifested by truncated O-linked saccharides. The resultant glycopeptide epitopes can bind cell surface major histocompatibility complex (MHC) molecules and are susceptible to recognition by cytotoxic T lymphocytes (CTLs), whereas aberrantly glycosylated MUC1 protein on the tumor cell surface can be bound by antibodies to mediate antibody-dependent cell-mediated cytotoxicity (ADCC). Efforts to elicit CTLs and IgG antibodies against cancer-expressed MUC1 have not been successful when nonglycosylated MUC1 sequences were used for vaccination, probably due to conformational dissimilarities. Immunizations with densely glycosylated MUC1 peptides have also been ineffective due to impaired susceptibility to antigen processing. Given the challenges to immuno-target tumor-associated MUC1, we have identified the minimum requirements to consistently induce CTLs and ADCC-mediating antibodies specific for the tumor form of MUC1 resulting in a therapeutic response in a mouse model of mammary cancer. The vaccine is composed of the immunoadjuvant Pam(3)CysSK(4), a peptide T(helper) epitope and an aberrantly glycosylated MUC1 peptide. Covalent linkage of the three components was essential for maximum efficacy. The vaccine produced CTLs, which recognized both glycosylated and nonglycosylated peptides, whereas a similar nonglycosylated vaccine gave CTLs which recognized only nonglycosylated peptide. Antibodies elicited by the glycosylated tripartite vaccine were significantly more lytic compared with the unglycosylated control. As a result, immunization with the glycosylated tripartite vaccine was superior in tumor prevention. Besides its own aptness as a clinical target, these studies of MUC1 are likely predictive of a covalent linking strategy applicable to many additional tumor-associated antigens.
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26
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Gaidzik N, Kaiser A, Kowalczyk D, Westerlind U, Gerlitzki B, Sinn HP, Schmitt E, Kunz H. Synthetic Antitumor Vaccines Containing MUC1 Glycopeptides with Two Immunodominant Domains-Induction of a Strong Immune Response against Breast Tumor Tissues. Angew Chem Int Ed Engl 2011; 50:9977-81. [DOI: 10.1002/anie.201104529] [Citation(s) in RCA: 273] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2011] [Indexed: 11/11/2022]
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27
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Gaidzik N, Kaiser A, Kowalczyk D, Westerlind U, Gerlitzki B, Sinn HP, Schmitt E, Kunz H. Synthetische Antitumor-Vakzine aus MUC1-Glycopeptiden mit zwei immundominanten Domänen - Induktion einer starken Immunreaktion gegen Brusttumorgewebe. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201104529] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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28
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Xie N, Taylor CM. Synthesis of a Dimer of β-(1,4)-l-Arabinosyl-(2S,4R)-4-hydroxyproline Inspired by Art v 1, the Major Allergen of Mugwort. Org Lett 2010; 12:4968-71. [DOI: 10.1021/ol102112z] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ning Xie
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Carol M. Taylor
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
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29
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Corzana F, Busto J, García de Luis M, Jiménez-Barbero J, Avenoza A, Peregrina J. The Nature and Sequence of the Amino Acid Aglycone Strongly Modulates the Conformation and Dynamics Effects of Tn Antigen's Clusters. Chemistry 2009; 15:3863-74. [DOI: 10.1002/chem.200801777] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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30
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Fernández-Tejada A, Corzana F, Busto JH, Avenoza A, Peregrina JM. Stabilizing unusual conformations in small peptides and glucopeptides using a hydroxylated cyclobutane amino acid. Org Biomol Chem 2009; 7:2885-93. [DOI: 10.1039/b907091p] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Corzana F, Busto JH, Engelsen SB, Jiménez-Barbero J, Asensio JL, Peregrina JM, Avenoza A. Effect of beta-O-glucosylation on L-Ser and L-Thr diamides: a bias toward alpha-helical conformations. Chemistry 2007; 12:7864-71. [PMID: 16850514 DOI: 10.1002/chem.200600128] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Beta-D-O-glucosylation produces a remarkable effect on the peptide backbone of the model peptides derived from serine and threonine. Consequently, this type of glycosylation is responsible for the experimentally observed shift from extended conformations (model peptides) towards the folded conformations (model glycopeptides). The conclusion has been solidly assessed by a combined NMR/MD protocol. Interestingly, the MD (molecular dynamics) results for the glycopeptides point towards the existence of water-bridging molecules between the sugar and peptide moieties, which could explain the stabilization of the folded conformers in aqueous solution.
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Affiliation(s)
- Francisco Corzana
- Departamento de Química, Universidad de La Rioja UA-CSIC. 26006 Logroño, Spain
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32
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Dziadek S, Griesinger C, Kunz H, Reinscheid UM. Synthesis and structural model of an alpha(2,6)-sialyl-t glycosylated MUC1 eicosapeptide under physiological conditions. Chemistry 2007; 12:4981-93. [PMID: 16642533 DOI: 10.1002/chem.200600144] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
To study the effect of O-glycosylation on the conformational propensities of a peptide backbone, a 20-residue peptide (GSTAPPAHGVTSAPDTRPAP) representing the full length tandem repeat sequence of the human mucin MUC1 and its analogue glycosylated with the (2,6)-sialyl-T antigen on Thr11, were prepared and investigated by NMR and molecular modeling. The peptides contain both the GVTSAP sequence, which is an effective substrate for GalNAc transferases, and the PDTRP fragment, a known epitope recognized by several anti-MUC1 monoclonal antibodies. It has been shown that glycosylation of threonine in the GVTSAP sequence is a prerequisite for subsequent glycosylation of the serine at GVTSAP. Furthermore, carbohydrates serve as additional epitopes for MUC1 antibodies. Investigation of the solution structure of the sialyl-T glycoeicosapeptide in a H(2)O/D(2)O mixture (9:1) under physiological conditions (25 degrees C and pH 6.5) revealed that the attachment of the saccharide side-chain affects the conformational equilibrium of the peptide backbone near the glycosylated Thr11 residue. For the GVTSA region, an extended, rod-like secondary structure was found by restrained molecular dynamics simulation. The APDTR region formed a turn structure which is more flexibly organized. Taken together, the joined sequence GVTSAPDTR represents the largest structural model of MUC1 derived glycopeptides analyzed so far.
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Affiliation(s)
- Sebastian Dziadek
- Institut für Organische Chemie der Universität Mainz, Duesbergweg 10-14, 55099 Mainz, Germany
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33
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Kuhn A, Kunz H. Vom Kohlenhydrat induzierte Peptidkonformation in Glycopeptiden aus der Erkennungsregion von LI-Cadherin. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200602494] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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34
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Kuhn A, Kunz H. Saccharide-Induced Peptide Conformation in Glycopeptides of the Recognition Region of LI-Cadherin. Angew Chem Int Ed Engl 2007; 46:454-8. [PMID: 17154199 DOI: 10.1002/anie.200602494] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Axel Kuhn
- Institut für Organische Chemie, Universität Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
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35
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Dziadek S, Kowalczyk D, Kunz H. Synthetische Vakzine aus tumorassoziierten MUC1-Glycopeptid-Antigenen und Rinderserumalbumin. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200501593] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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36
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Dziadek S, Kowalczyk D, Kunz H. Synthetic Vaccines Consisting of Tumor-Associated MUC1 Glycopeptide Antigens and Bovine Serum Albumin. Angew Chem Int Ed Engl 2005; 44:7624-30. [PMID: 16247814 DOI: 10.1002/anie.200501593] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sebastian Dziadek
- Institut für Organische Chemie, Johannes Gutenberg-Universität Mainz, Mainz, Germany
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37
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Nolen EG, Kurish AJ, Potter JM, Donahue LA, Orlando MD. Stereoselective Synthesis of α-C-Glucosyl Serine and Alanine via a Cross-Metathesis/Cyclization Strategy. Org Lett 2005; 7:3383-6. [PMID: 16018666 DOI: 10.1021/ol051341q] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
C-Glycosyl amino acids represent stable mimics of monomeric units within natural O-linked glycoproteins. Olefin cross-metathesis has been used to provide alkene precursors for a mercury(II)-mediated cyclization, yielding alpha-C-glucosyl serine and alanine.
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Affiliation(s)
- Ernest G Nolen
- Department of Chemistry, Colgate University, Hamilton, New York 13346, USA.
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38
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Palian MM, Boguslavsky VI, O'Brien DF, Polt R. Glycopeptide-membrane interactions: glycosyl enkephalin analogues adopt turn conformations by NMR and CD in amphipathic media. J Am Chem Soc 2003; 125:5823-31. [PMID: 12733923 DOI: 10.1021/ja0268635] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Four enkephalin analogues (Tyr-D-Thr-Gly-Phe-Leu-Ser-CONH(2), 1, and the related O-linked glycopeptides bearing the monosaccharide beta-glucose, 2, the disaccharide beta-maltose, 3, and the trisaccharide beta-maltotriose, 4) were synthesized, purified by HPLC, and biophysical studies were conducted to examine their interactions with membrane model systems. Glycopeptide 2 has been previously reported to penetrate the blood-brain barrier (BBB), and produce potent analgesia superior to morphine in mice (J. Med. Chem.2000, 43, 2586-90 and J. Pharm. Exp. Ther. 2001, 299, 967-972). The parent peptide and its three glycopeptide derivatives were studied in aqueous solution and in the presence of micelles using 2-D NMR, CD, and molecular mechanics (Monte Carlo studies). Consistent with previous conformational studies on cyclic opioid agonist glycopeptides, it was seen that glycosylation did not significantly perturb the peptide backbone in aqueous solution, but all four compounds strongly associated with 5-30 mM SDS or DPC micelles, and underwent profound membrane-induced conformational changes. Interaction was also observed with POPC:POPE:cholesterol lipid vesicles (LUV) in equilibrium dialysis experiments. Although the peptide backbones of 1-4 possessed random coil structures in water, in the presence of the lipid phase they each formed a nearly identical pair of structures, all with a stable beta-turn motif at the C-terminus. Use of spin labels (Mn(2+) and 5-DOXYL-stearic acid) allowed for the determination of the position and orientation of the compounds relative to the surface of the micelle.
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Affiliation(s)
- Michael M Palian
- Carl S. Marvel Laboratories, Department of Chemistry, The University of Arizona, Tucson, Arizona 85721, USA
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39
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Schuman J, Campbell AP, Koganty RR, Longenecker BM. Probing the conformational and dynamical effects of O-glycosylation within the immunodominant region of a MUC1 peptide tumor antigen. THE JOURNAL OF PEPTIDE RESEARCH : OFFICIAL JOURNAL OF THE AMERICAN PEPTIDE SOCIETY 2003; 61:91-108. [PMID: 12558945 DOI: 10.1034/j.1399-3011.2003.00031.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
MUC1 mucin is a large transmembrane glycoprotein, the extracellular domain of which is formed by a repeating 20 amino acid sequence, GVTSAPDTRPAPGSTAPPAH. In normal breast epithelial cells, the extracellular domain is densely covered with highly branched complex carbohydrate structures. However, in neoplastic breast tissue, the extracellular domain is under-glycosylated, resulting in the exposure of a highly immunogenic core peptide epitope (PDTRP in bold above), as well as in the exposure of normally cryptic core Tn (GalNAc), STn (sialyl alpha2-6 GalNAc) and TF (Gal beta1-3 GalNAc) carbohydrates. Here, we report the results of 1H NMR structural studies, natural abundance 13C NMR relaxation measurements and distance-restrained MD simulations designed to probe the structural and dynamical effects of Tn-glycosylation within the PDTRP core peptide epitope. Two synthetic peptides were studied: a nine-residue MUC1 peptide of the sequence, Thr1-Ser2-Ala3-Pro4-Asp5-Thr6-Arg7-Pro8-Ala9, and a Tn-glycosylated version of this peptide, Thr1-Ser2-Ala3-Pro4-Asp5-Thr6(alphaGalNAc)-Arg7-Pro8-Ala9. The results of these studies show that a type I beta-turn conformation is adopted by residues PDTR within the PDTRP region of the unglycosylated MUC1 sequence. The existence of a similar beta-turn within the PDTRP core peptide epitope of the under-glycosylated cancer-associated MUC1 mucin protein might explain the immunodominance of this region in vivo, as the presence of defined secondary structure within peptide epitope regions has been correlated with increased immunogenicity in other systems. Our results have also shown that Tn glycosylation at the central threonine within the PDTRP core epitope region shifts the conformational equilibrium away from the type I beta-turn conformation and toward a more rigid and extended state. The significance of these results are discussed in relation to the possible roles that peptide epitope secondary structure and glycosylation state may play in MUC1 tumor immunogenicity.
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Affiliation(s)
- J Schuman
- Department of Medicinal Chemistry, School of Pharmacy, University of Washington, Seattle 98195, USA.
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40
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Coltart DM, Royyuru AK, Williams LJ, Glunz PW, Sames D, Kuduk SD, Schwarz JB, Chen XT, Danishefsky SJ, Live DH. Principles of mucin architecture: structural studies on synthetic glycopeptides bearing clustered mono-, di-, tri-, and hexasaccharide glycodomains. J Am Chem Soc 2002; 124:9833-44. [PMID: 12175243 DOI: 10.1021/ja020208f] [Citation(s) in RCA: 138] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The structural characteristics of a mucin glycopeptide motif derived from the N-terminal fragment STTAV of the cell surface glycoprotein CD43 have been investigated by NMR. In this study, a series of molecules prepared by total synthesis were examined, consisting of the peptide itself, three glycopeptides having clustered sites of alpha-O-glycosylation on the serine and threonine side chains with the Tn, TF, and STF carbohydrate antigens, respectively, and one with the beta-O-linked TF antigen. Additionally, a glycopeptide having the sequence SSSAVAV, triglycosylated with the Le(y) epitope, was investigated. NMR data for the tri-STF-STTAV glycopeptide were used to solve the structure of this construct through restrained molecular dynamics calculations. The calculations revealed a defined conformation for the glycopeptide core rooted in the interaction of the peptide and the first N-acetylgalactosamine residue. The similarity of the NMR data for each of the alpha-O-linked glycopeptides demonstrates that this structure persists for each construct and that the mode of attachment of the first sugar and the peptide is paramount in establishing the organization of the core. The core provides a common framework on which a variety of glycans may be displayed. Remarkably, while there is a profound organizational effect on the peptide backbone with the alpha-linked glycans, attachment via a beta-linkage has little apparent consequence.
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Affiliation(s)
- Don M Coltart
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota Medical School, Minneapolis, Minnesota 55455, USA
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41
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Keil S, Claus C, Dippold W, Kunz H. Zur Entwicklung von Antitumor-Impfstoffen: ein synthetisches Konjugat aus tumorassoziiertem MUC1-Glycopeptidantigen und dem Tetanustoxin-Epitop. Angew Chem Int Ed Engl 2001. [DOI: 10.1002/1521-3757(20010119)113:2<379::aid-ange379>3.0.co;2-s] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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42
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Keil S, Claus C, Dippold W, Kunz H. Towards the Development of Antitumor Vaccines: A Synthetic Conjugate of a Tumor-Associated MUC1 Glycopeptide Antigen and a Tetanus Toxin Epitope. Angew Chem Int Ed Engl 2001; 40:366-369. [DOI: 10.1002/1521-3773(20010119)40:2<366::aid-anie366>3.0.co;2-j] [Citation(s) in RCA: 104] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2000] [Indexed: 11/08/2022]
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