201
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Challenges in Antibody Development against Tn and Sialyl-Tn Antigens. Biomolecules 2015. [DOI: 10.3390/biom5031783 and 5081=5081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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202
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Kudelka MR, Ju T, Heimburg-Molinaro J, Cummings RD. Simple sugars to complex disease--mucin-type O-glycans in cancer. Adv Cancer Res 2015; 126:53-135. [PMID: 25727146 DOI: 10.1016/bs.acr.2014.11.002] [Citation(s) in RCA: 357] [Impact Index Per Article: 39.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Mucin-type O-glycans are a class of glycans initiated with N-acetylgalactosamine (GalNAc) α-linked primarily to Ser/Thr residues within glycoproteins and often extended or branched by sugars or saccharides. Most secretory and membrane-bound proteins receive this modification, which is important in regulating many biological processes. Alterations in mucin-type O-glycans have been described across tumor types and include expression of relatively small-sized, truncated O-glycans and altered terminal structures, both of which are associated with patient prognosis. New discoveries in the identity and expression of tumor-associated O-glycans are providing new avenues for tumor detection and treatment. This chapter describes mucin-type O-glycan biosynthesis, altered mucin-type O-glycans in primary tumors, including mechanisms for structural changes and contributions to the tumor phenotype, and clinical approaches to detect and target altered O-glycans for cancer treatment and management.
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Affiliation(s)
- Matthew R Kudelka
- Department of Biochemistry, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Tongzhong Ju
- Department of Biochemistry, Emory University School of Medicine, Atlanta, Georgia, USA
| | | | - Richard D Cummings
- Department of Biochemistry, Emory University School of Medicine, Atlanta, Georgia, USA.
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203
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Ju T, Aryal RP, Kudelka MR, Wang Y, Cummings RD. The Cosmc connection to the Tn antigen in cancer. Cancer Biomark 2015; 14:63-81. [PMID: 24643043 DOI: 10.3233/cbm-130375] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The Tn antigen is a tumor-associated carbohydrate antigen that is not normally expressed in peripheral tissues or blood cells. Expression of this antigen, which is found in a majority of human carcinomas of all types, arises from a blockage in the normal O-glycosylation pathway in which glycans are extended from the common precursor GalNAcα1-O-Ser/Thr (Tn antigen). This precursor is generated in the Golgi apparatus on newly synthesized glycoproteins by a family of polypeptide α-N-acetylgalactosaminyltransferases (ppGalNAcTs) and then extended to the common core 1 O-glycan Galβ1-3GalNAcα1-O-Ser/Thr (T antigen) by a single enzyme termed the T-synthase (core 1 β3-galactosyltransferase or C1GalT). Formation of the active form of the T-synthase requires a unique molecular chaperone termed Cosmc, encoded by Cosmc on the X-chromosome (Xq24 in humans, Xc3 in mice). Cosmc resides in the endoplasmic reticulum (ER) and prevents misfolding, aggregation, and proteasome-dependent degradation of newly synthesized T-synthase. Loss of expression of active T-synthase or Cosmc can lead to expression of the Tn antigen, along with its sialylated version Sialyl Tn antigen as observed in several cancers. Both genetic and epigenetic pathways, in addition to potential metabolic regulation, can result in abnormal expression of the Tn antigen. Engineered expression of the Tn antigen by disruption of either C1GalT (T-syn) or Cosmc in mice is associated with a tremendous range of pathologies and engineered expression of the Tn antigen in mouse embryos leads to embryonic death. Studies indicate that many membrane glycoproteins expressing the Tn antigen and/or truncated O-glycans may be dysfunctional, due to degradation and/or misfolding. Thus, expression of normal O-glycans is associated with health and homeostasis whereas truncation of O-glycans, e.g. the Tn and/or Sialyl Tn antigens is associated with cancer and other pathologies.
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Affiliation(s)
- Tongzhong Ju
- Department of Biochemistry and the Emory Glycomics Center, Emory University School of Medicine, Atlanta, GA, USA
| | - Rajindra P Aryal
- Department of Biochemistry and the Emory Glycomics Center, Emory University School of Medicine, Atlanta, GA, USA
| | - Matthew R Kudelka
- Department of Biochemistry and the Emory Glycomics Center, Emory University School of Medicine, Atlanta, GA, USA
| | - Yingchun Wang
- Department of Biochemistry and the Emory Glycomics Center, Emory University School of Medicine, Atlanta, GA, USA
| | - Richard D Cummings
- Department of Biochemistry and the Emory Glycomics Center, Emory University School of Medicine, Atlanta, GA, USA
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204
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Ju T, Wang Y, Aryal RP, Lehoux SD, Ding X, Kudelka MR, Cutler C, Zeng J, Wang J, Sun X, Heimburg-Molinaro J, Smith DF, Cummings RD. Tn and sialyl-Tn antigens, aberrant O-glycomics as human disease markers. Proteomics Clin Appl 2013; 7:618-31. [PMID: 23857728 DOI: 10.1002/prca.201300024] [Citation(s) in RCA: 113] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Accepted: 04/24/2013] [Indexed: 12/12/2022]
Abstract
In many different human disorders, the cellular glycome is altered. An interesting but poorly understood alteration occurs in the mucin-type O-glycome, in which there is aberrant expression of the truncated O-glycans Tn (GalNAcα1-Ser/Thr) and its sialylated version sialyl-Tn (STn) (Neu5Acα2,6GalNAcα1-Ser/Thr). Both Tn and STn are tumor-associated carbohydrate antigens and tumor biomarkers, since they are not expressed normally and appear early in tumorigenesis. Moreover, their expression is strongly associated with poor prognosis and tumor metastasis. The Tn and STn antigens are also expressed in other human diseases and disorders, such as Tn syndrome and IgA nephropathy. The major pathological mechanism for expression of the Tn and STn antigens is compromised T-synthase activity, resulting from alteration of the X-linked gene that encodes for Cosmc, a molecular chaperone specifically required for the correct folding of T-synthase to form active enzyme. This review will summarize our current understanding of the Tn and STn antigens in terms of their biochemistry and role in pathology.
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Affiliation(s)
- Tongzhong Ju
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Yingchun Wang
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA, USA
| | - Rajindra P Aryal
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA, USA
| | - Sylvain D Lehoux
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA, USA
| | - Xiaokun Ding
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA, USA
| | - Matthew R Kudelka
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA, USA
| | - Christopher Cutler
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA, USA
| | - Junwei Zeng
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA, USA
| | - Jianmei Wang
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA, USA
| | - Xiaodong Sun
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA, USA
| | | | - David F Smith
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA, USA
| | - Richard D Cummings
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA, USA
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205
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Wang R, Yu C, Zhao D, Wu M, Yang Z. The mucin-type glycosylating enzyme polypeptide N-acetylgalactosaminyltransferase 14 promotes the migration of ovarian cancer by modifying mucin 13. Oncol Rep 2013; 30:667-76. [PMID: 23708057 DOI: 10.3892/or.2013.2493] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Accepted: 04/10/2013] [Indexed: 11/05/2022] Open
Abstract
A high expression of O-glycosylated proteins is one of the prominent characteristics of ovarian carcinoma cells associated with cell migration, which would be attributed to the upregulated expression of glycosyltransferases. Therefore, elucidating glycosyltransferases and their substrates may improve our understanding of their roles in tumor metastasis. In the present study, we reported that knockdown of polypeptide N-acetylgalactosaminyltransferase 14 (GALNT14) by small interfering RNA significantly suppressed the cell migration and altered cellular morphology. Immunoprecipitation and western blot analyses indicated that GALNT14 contributed to the glycosylation of transmembrane mucin 13 (MUC13), which was significantly higher in ovarian cancer cells compared with the normal/benign ovary tissues. Furthermore, interleukin-8 (IL-8), which could regulate the migration ability of epithelial ovarian cancer (EOC) cells, had no remarkable effect on the expression of GALNT14 and the tumor-associated carbohydrate epitope Tn antigen. In addition, extracellular signal-regulated kinase 1/2 (ERK1/2) inhibitor modulated the expression levels of GALNT14. Our findings provide evidence that GALNT14 may contribute to ovarian carcinogenesis through aberrant glycosylation of MUC13, but not through the IL-8 pathway. These data provide novel insights into understanding the function of MUC13 on neoplasm metastasis and may aid in the development of new anticancer drugs for EOC.
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MESH Headings
- Antigens, Tumor-Associated, Carbohydrate/genetics
- Antigens, Tumor-Associated, Carbohydrate/metabolism
- Carcinogenesis/genetics
- Carcinogenesis/metabolism
- Carcinogenesis/pathology
- Carcinoma, Ovarian Epithelial
- Cell Line, Tumor
- Cell Movement/genetics
- Cell Movement/physiology
- Female
- Glycosylation
- Humans
- Interleukin-8/genetics
- Interleukin-8/metabolism
- MAP Kinase Signaling System/genetics
- Mucins/genetics
- Mucins/metabolism
- N-Acetylgalactosaminyltransferases/genetics
- N-Acetylgalactosaminyltransferases/metabolism
- Neoplasm Metastasis
- Neoplasms, Glandular and Epithelial/enzymology
- Neoplasms, Glandular and Epithelial/genetics
- Neoplasms, Glandular and Epithelial/metabolism
- Neoplasms, Glandular and Epithelial/pathology
- Ovarian Neoplasms/enzymology
- Ovarian Neoplasms/genetics
- Ovarian Neoplasms/metabolism
- Ovarian Neoplasms/pathology
- Polypeptide N-acetylgalactosaminyltransferase
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Affiliation(s)
- Ranran Wang
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, PR China
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206
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Fujita-Yamaguchi Y. Renewed interest in basic and applied research involving monoclonal antibodies against an oncofetal Tn-antigen. J Biochem 2013; 154:103-5. [PMID: 23740330 DOI: 10.1093/jb/mvt052] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Tn-antigen (GalNAcα-Ser/Thr) is one of the most common aberrations associated with cancer progression and metastasis, and thus is an excellent target for development of cancer diagnostics and therapeutics. MLS128 monoclonal antibody (mAb), derived from a mouse immunized with human colon carcinoma cells, was reported to bind to two or three consecutive Tn-antigens (Tn2 or Tn3) with one-order higher affinity for Tn3 than for Tn2. Our recent studies demonstrated that MLS128 significantly inhibits breast and colon cancer cell growth. Molecular cloning of the variable regions of heavy (VH) and light (VL) chains revealed that the VH sequence of MLS128 shared 97% nucleotide sequence identity with the VH of 83D4 mAb, derived from breast cancer-immunized mice, which has a similar affinity for Tn2/Tn3. MLS128 single-chain antibodies (scFv) and scFv-Fc were constructed to confirm the affinity for synthetic Tn2/Tn3 peptides. Thermodynamic studies on MLS128 binding to Tn2/Tn3 revealed its unique nature of temperature-dependent binding.
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Affiliation(s)
- Yoko Fujita-Yamaguchi
- Department of Applied Biochemistry, Tokai University School of Engineering, Hiratsuka, Kanagawa, Japan.
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207
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Mazal D, Lo-Man R, Bay S, Pritsch O, Dériaud E, Ganneau C, Medeiros A, Ubillos L, Obal G, Berois N, Bollati-Fogolin M, Leclerc C, Osinaga E. Monoclonal antibodies toward different Tn-amino acid backbones display distinct recognition patterns on human cancer cells. Implications for effective immuno-targeting of cancer. Cancer Immunol Immunother 2013; 62:1107-22. [PMID: 23604173 PMCID: PMC11029704 DOI: 10.1007/s00262-013-1425-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Accepted: 03/31/2013] [Indexed: 02/06/2023]
Abstract
The Tn antigen (GalNAcα-O-Ser/Thr) is a well-established tumor-associated marker which represents a good target for the design of anti-tumor vaccines. Several studies have established that the binding of some anti-Tn antibodies could be affected by the density of Tn determinant or/and by the amino acid residues neighboring O-glycosylation sites. In the present study, using synthetic Tn-based vaccines, we have generated a panel of anti-Tn monoclonal antibodies. Analysis of their binding to various synthetic glycopeptides, modifying the amino acid carrier of the GalNAc(*) (Ser* vs Thr*), showed subtle differences in their fine specificities. We found that the recognition of these glycopeptides by some of these MAbs was strongly affected by the Tn backbone, such as a S*S*S* specific MAb (15G9) which failed to recognize a S*T*T* or a T*T*T* structure. Different binding patterns of these antibodies were also observed in FACS and Western blot analysis using three human cancer cell lines (MCF-7, LS174T and Jurkat). Importantly, an immunohistochemical analysis of human tumors (72 breast cancer and 44 colon cancer) showed the existence of different recognition profiles among the five antibodies evaluated, demonstrating that the aglyconic part of the Tn structure (Ser vs Thr) plays a key role in the anti-Tn specificity for breast and colon cancer detection. This new structural feature of the Tn antigen could be of important clinical value, notably due to the increasing interest of this antigen in anticancer vaccine design as well as for the development of anti-Tn antibodies for in vivo diagnostic and therapeutic strategies.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Amino Acid Sequence
- Animals
- Antibodies, Monoclonal/immunology
- Antibodies, Monoclonal/metabolism
- Antibody Specificity/immunology
- Antigens, Tumor-Associated, Carbohydrate/chemistry
- Antigens, Tumor-Associated, Carbohydrate/immunology
- Antigens, Tumor-Associated, Carbohydrate/metabolism
- Biomarkers, Tumor
- Breast Neoplasms/immunology
- Breast Neoplasms/metabolism
- Breast Neoplasms/pathology
- Cell Line, Tumor
- Colonic Neoplasms/immunology
- Colonic Neoplasms/metabolism
- Colonic Neoplasms/pathology
- Female
- Glycopeptides/chemistry
- Glycopeptides/immunology
- Glycopeptides/metabolism
- Humans
- Male
- Mice
- Middle Aged
- Neoplasm Staging
- Neoplasms/immunology
- Neoplasms/metabolism
- Neoplasms/pathology
- Protein Binding/immunology
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Affiliation(s)
- Daniel Mazal
- Departamento de Anatomía Patológica y Citología del Hospital de la Mujer, Centro Hospitalario Pereira Rossell, Montevideo, Uruguay
| | - Richard Lo-Man
- Unité de Régulation Immunitaire et Vaccinologie, Institut Pasteur, Paris, France
- Institut National de la Santé et de la Recherche Médicale, U1041 Paris, France
| | - Sylvie Bay
- Unité de Chimie des Biomolécules, Institut Pasteur, Paris, France
- Centre National de la Recherche Scientifique UMR 3523, Paris, France
| | - Otto Pritsch
- Departamento de Inmunobiologia, Facultad de Medicina, Universidad de la República, Avda Gral Flores 2125, 11800 Montevideo, Uruguay
- Unidad de Biofísica de Proteínas, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Edith Dériaud
- Unité de Régulation Immunitaire et Vaccinologie, Institut Pasteur, Paris, France
- Institut National de la Santé et de la Recherche Médicale, U1041 Paris, France
| | - Christelle Ganneau
- Unité de Chimie des Biomolécules, Institut Pasteur, Paris, France
- Centre National de la Recherche Scientifique UMR 3523, Paris, France
| | - Andrea Medeiros
- Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Luis Ubillos
- Departamento de Inmunobiologia, Facultad de Medicina, Universidad de la República, Avda Gral Flores 2125, 11800 Montevideo, Uruguay
| | - Gonzalo Obal
- Departamento de Inmunobiologia, Facultad de Medicina, Universidad de la República, Avda Gral Flores 2125, 11800 Montevideo, Uruguay
- Unidad de Biofísica de Proteínas, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | - Nora Berois
- Laboratorio de Glicobiología e Inmunología Tumoral, Institut Pasteur de Montevideo, Montevideo, Uruguay
| | | | - Claude Leclerc
- Unité de Régulation Immunitaire et Vaccinologie, Institut Pasteur, Paris, France
- Institut National de la Santé et de la Recherche Médicale, U1041 Paris, France
| | - Eduardo Osinaga
- Departamento de Inmunobiologia, Facultad de Medicina, Universidad de la República, Avda Gral Flores 2125, 11800 Montevideo, Uruguay
- Laboratorio de Glicobiología e Inmunología Tumoral, Institut Pasteur de Montevideo, Montevideo, Uruguay
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208
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Primary breast cancer tumours contain high amounts of IgA1 immunoglobulin: an immunohistochemical analysis of a possible carrier of the tumour-associated Tn antigen. PLoS One 2013; 8:e61749. [PMID: 23637900 PMCID: PMC3630176 DOI: 10.1371/journal.pone.0061749] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Accepted: 03/13/2013] [Indexed: 12/20/2022] Open
Abstract
The Tn antigen (GalNAc alpha-O-Ser/Thr) as defined by the binding of the lectin, helix pomatia agglutinin (HPA) or anti-Tn monoclonal antibodies, is known to be exposed in a majority of cancers, and it has also been shown to correlate positively with the metastatic capacity in breast carcinoma. The short O-glycan that forms the antigen is carried by a number of different proteins. One potential carrier of the Tn antigen is immunoglobulin A1 (IgA1), which we surprisingly found in tumour cells of the invasive parts of primary breast carcinoma. Conventional immunohistochemical analysis of paraffin-embedded sections from primary breast cancers showed IgA1 to be present in the cytoplasm and plasma membrane of 35 out of 36 individual primary tumours. The immunohistochemical staining of HPA and anti-Tn antibody (GOD3-2C4) did to some extent overlap with the presence of IgA1 in the tumours, but differences were seen in the percentage of stained cells and in the staining pattern in the different breast cancers analysed. Anti-Tn antibody and HPA were also shown to specifically bind to a number of possible constellations of the Tn antigen in the hinge region of IgA1. Both reagents could also detect the presence of Tn positive IgA in serum. On average 51% of the tumour cells in the individual breast cancer tumour sections showed staining for IgA1. The overall amount of staining in the invasive part of the tumour with the anti Tn antibody was 67%, and 93% with HPA. The intra-expression or uptake of IgA1 in breast cancer makes it a new potential carrier of the tumour associated and immunogenic Tn antigen.
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209
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Yuasa N, Ogawa H, Koizumi T, Tsukamoto K, Matsumoto-Takasaki A, Asanuma H, Nakada H, Fujita-Yamaguchi Y. Construction and expression of anti-Tn-antigen-specific single-chain antibody genes from hybridoma producing MLS128 monoclonal antibody. J Biochem 2012; 151:371-81. [DOI: 10.1093/jb/mvs007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
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210
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Matsumoto-Takasaki A, Hanashima S, Aoki A, Yuasa N, Ogawa H, Sato R, Kawakami H, Mizuno M, Nakada H, Yamaguchi Y, Fujita-Yamaguchi Y. Surface plasmon resonance and NMR analyses of anti Tn-antigen MLS128 monoclonal antibody binding to two or three consecutive Tn-antigen clusters. J Biochem 2011; 151:273-82. [DOI: 10.1093/jb/mvr138] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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211
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Blixt O, Lavrova OI, Mazurov DV, Cló E, Kracun SK, Bovin NV, Filatov AV. Analysis of Tn antigenicity with a panel of new IgM and IgG1 monoclonal antibodies raised against leukemic cells. Glycobiology 2011; 22:529-42. [PMID: 22143985 DOI: 10.1093/glycob/cwr178] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
CD175 or Tn antigen is a carbohydrate moiety of N-acetylgalactosamine (GalNAc)α1-O- linked to the residue of amino acid serine or threonine in a polypeptide chain. Despite the chemical simplicity of the Tn antigen, its antigenic structure is considered to be complex and the clear determinants of Tn antigenicity remain poorly understood. As a consequence, a broad variety of anti-Tn monoclonal antibodies (mAbs) have been generated. To further investigate the nature and complexity of the Tn antigen, we generated seven different anti-Tn mAbs of IgM and IgG classes raised against human Jurkat T cells, which are Tn-positive due to the low activity of T-synthase and mutation in specific chaperone Cosmc. The binding analysis of anti-Tn mAbs with the array of synthetic saccharides, glycopeptides and O-glycoproteins revealed unexpected differences in specificities of anti-Tn mAbs. IgM mAbs bound the terminal GalNAc residue of the Tn antigen irrespective of the peptide context or with low selectivity to the glycoproteins. In contrast, IgG mAbs recognized the Tn antigen in the context of a specific peptide motif. Particularly, JA3 mAb reacted to the GSPP or GSPAPP, and JA5 mAb recognized specifically the GSP motif (glycosylation sites are underlined). The major O-glycan carrier proteins CD43 and CD162 and isoforms of CD45 expressed on Jurkat cells were precipitated by anti-Tn mAbs with different affinities. In summary, our data suggest that Tn antigen-Ab binding capacity is determined by the peptide context of the Tn antigen, antigenic specificity of the Ab and class of the immunoglobulin. The newly generated anti-Tn IgG mAbs with the strong specificity to glycoprotein CD43 can be particularly interesting for the application in leukemia diagnostics and therapy.
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Affiliation(s)
- Ola Blixt
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, University of Copenhagen, Blegdamsvej 3, dept. 24.6.48, DK-2200 N Copenhagen, Denmark
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212
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Heimburg-Molinaro J, Lum M, Vijay G, Jain M, Almogren A, Rittenhouse-Olson K. Cancer vaccines and carbohydrate epitopes. Vaccine 2011; 29:8802-26. [PMID: 21964054 PMCID: PMC3208265 DOI: 10.1016/j.vaccine.2011.09.009] [Citation(s) in RCA: 175] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2011] [Revised: 08/18/2011] [Accepted: 09/06/2011] [Indexed: 12/17/2022]
Abstract
Tumor-associated carbohydrate antigens (TACA) result from the aberrant glycosylation that is seen with transformation to a tumor cell. The carbohydrate antigens that have been found to be tumor-associated include the mucin related Tn, Sialyl Tn, and Thomsen-Friedenreich antigens, the blood group Lewis related Lewis(Y), Sialyl Lewis(X) and Sialyl Lewis(A), and Lewis(X) (also known as stage-specific embryonic antigen-1, SSEA-1), the glycosphingolipids Globo H and stage-specific embryonic antigen-3 (SSEA-3), the sialic acid containing glycosphingolipids, the gangliosides GD2, GD3, GM2, fucosyl GM1, and Neu5GcGM3, and polysialic acid. Recent developments have furthered our understanding of the T-independent type II response that is seen in response to carbohydrate antigens. The selection of a vaccine target antigen is based on not only the presence of the antigen in a variety of tumor tissues but also on the role this antigen plays in tumor growth and metastasis. These roles for TACAs are being elucidated. Newly acquired knowledge in understanding the T-independent immune response and in understanding the key roles that carbohydrates play in metastasis are being applied in attempts to develop an effective vaccine response to TACAs. The role of each of the above mentioned carbohydrate antigens in cancer growth and metastasis and vaccine attempts using these antigens will be described.
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Affiliation(s)
| | - Michelle Lum
- Department of Cellular and Molecular Biology, Roswell Park Cancer Institute, Buffalo, NY 14263
| | - Geraldine Vijay
- University of Texas, MD Anderson Cancer Center, Houston, Texas 77030
| | - Miten Jain
- Department of Biomolecular Engineering, University of California Santa Cruz, CA 95064
| | - Adel Almogren
- Department Of Pathology, College of Medicine, King Saud University, Riyadh, 11461 Saudi Arabia
| | - Kate Rittenhouse-Olson
- Department Of Pathology, College of Medicine, King Saud University, Riyadh, 11461 Saudi Arabia
- Department of Biotechnical and Clinical Laboratory Sciences, University at Buffalo, Buffalo, NY 14214
- Department of Microbiology and Immunology, University at Buffalo, Buffalo, NY 14214
- Department of Immunology, Roswell Park Cancer Institute, Buffalo, NY 14263
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213
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Hubert P, Heitzmann A, Viel S, Nicolas A, Sastre-Garau X, Oppezzo P, Pritsch O, Osinaga E, Amigorena S. Antibody-dependent cell cytotoxicity synapses form in mice during tumor-specific antibody immunotherapy. Cancer Res 2011; 71:5134-43. [PMID: 21697279 DOI: 10.1158/0008-5472.can-10-4222] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Antibody-dependent cell cytotoxicity (ADCC) plays a critical role in monoclonal antibody (mAb)-mediated cancer therapy. ADCC, however, has not been directly shown in vivo but inferred from the requirement for IgG Fc receptors (FcγR) in tumor rejection in mice. Here, we investigated the mechanism of action of a Tn antigen-specific chimeric mAb (Chi-Tn), which binds selectively to a wide variety of carcinomas, but not to normal tissues, in both humans and mice. Chi-Tn mAb showed no direct toxicity against carcinomas cell lines in vitro but induced the rejection of a murine breast tumor in 80% to 100% of immunocompetent mice, when associated with cyclophosphamide. Tumor rejection was abolished in Fc receptors-associated γ chain (FcR-γ)-deficient mice, suggesting a role for ADCC. Indeed, tumor cells formed stable conjugates in vivo with FcR-γ chain-expressing macrophages and neutrophils in Chi-Tn mAb-treated but not in control mAb-treated mice. The contact zone between tumor cells and ADCC effectors accumulated actin, FcγR and phospho-tyrosines. The in vivo formed ADCC synapses were organized in multifocal supra-molecular activation clusters. These results show that in vivo ADCC mediated by macrophages and neutrophils during tumor rejection by Chi-Tn mAb involves a novel type of multifocal immune synapse between effectors of innate immunity and tumor cells.
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Affiliation(s)
- Pascale Hubert
- Institut Curie, Hôpital, Département de Biologie des tumeurs, Paris, France
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214
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Welinder C, Baldetorp B, Borrebaeck C, Fredlund BM, Jansson B. A new murine IgG1 anti-Tn monoclonal antibody with in vivo anti-tumor activity. Glycobiology 2011; 21:1097-107. [PMID: 21470982 DOI: 10.1093/glycob/cwr048] [Citation(s) in RCA: 224] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The Tn antigen (GalNAc α-O-Ser/Thr) is heterogeneously synthesized by a variety of tumors and contains an epitope defined by lectins and antibodies as a cluster of αGalNAc carbohydrates synthesized within a peptide sequence, which is rich in serine and/or threonine. The Tn antigen has been utilized as a target in vaccine experiments and also used as a biomarker for prognosis of different cancer forms. In this paper, we present a new monoclonal antibody, GOD3-2C4, with the clear hallmarks of an anti-Tn antibody. It was generated through somatic cell hybridization after immunization of a mouse with a tumor cell line and a Tn carrying mucin. The antibody recognizes synthetic Tn antigen and binds breast, colon, lung, ovarian and pancreas cancer. The GOD3-2C4 antibody has antibody-dependent cellular cytotoxicity activity against Jurkat cells in vitro, and for the first time, it can be shown that an anti-Tn antibody has a significant in vivo effect on a human cancer cell line grown as a xenograft in severe combined immunodeficiency mice.
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Affiliation(s)
- Charlotte Welinder
- Department of Oncology, Clinical Sciences, Lund University, Lund, Sweden
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215
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Rich RL, Myszka DG. Grading the commercial optical biosensor literature-Class of 2008: 'The Mighty Binders'. J Mol Recognit 2010; 23:1-64. [PMID: 20017116 DOI: 10.1002/jmr.1004] [Citation(s) in RCA: 109] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Optical biosensor technology continues to be the method of choice for label-free, real-time interaction analysis. But when it comes to improving the quality of the biosensor literature, education should be fundamental. Of the 1413 articles published in 2008, less than 30% would pass the requirements for high-school chemistry. To teach by example, we spotlight 10 papers that illustrate how to implement the technology properly. Then we grade every paper published in 2008 on a scale from A to F and outline what features make a biosensor article fabulous, middling or abysmal. To help improve the quality of published data, we focus on a few experimental, analysis and presentation mistakes that are alarmingly common. With the literature as a guide, we want to ensure that no user is left behind.
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Affiliation(s)
- Rebecca L Rich
- Center for Biomolecular Interaction Analysis, University of Utah, Salt Lake City, UT 84132, USA
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216
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Sakai K, Yuasa N, Tsukamoto K, Takasaki-Matsumoto A, Yajima Y, Sato R, Kawakami H, Mizuno M, Takayanagi A, Shimizu N, Nakata M, Fujita-Yamaguchi Y. Isolation and characterization of antibodies against three consecutive Tn-antigen clusters from a phage library displaying human single-chain variable fragments. J Biochem 2010; 147:809-17. [PMID: 20147453 DOI: 10.1093/jb/mvq014] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
The Tn-antigen, GalNAcalpha-Ser/Thr, is a tumour-associated carbohydrate antigen that may provide a sensitive and specific marker for pre-clinical detection of carcinoma and a target for cancer therapies. We recently reported that MLS128 monoclonal antibody treatment significantly inhibited colon and breast cancer cell growth. On the basis of our observations, the present study aimed to produce human anti-Tn-antigen antibodies with specificity similar to that of MLS128 monoclonal antibody, which recognizes a structure of three consecutive Tn-antigens (Tn3). Six phage clones displaying human single-chain variable fragments (scFvs) were isolated from a newly constructed phage library by panning and screening with a synthetic Tn3-peptide. Deduced amino-acid sequences of six anti-Tn3 scFvs exhibited a high degree of homology. Of those, anti-Tn3 4E10 and 4G2 scFv proteins were successfully purified from phage-infected Escherichia coli to near homogeneity. Surface plasmon resonance analyses revealed a K(D) of purified scFv proteins for Tn3 on an order of 10(-7) M, which is high for carbohydrate-specific monovalent antibodies. Further analyses suggested that both scFv proteins also bind to Tn2 and cultured colon and breast cancer cells. These results demonstrated the potential for use of these scFvs in developing antibody therapeutics targeting colon and breast cancer.
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Affiliation(s)
- Keiko Sakai
- Department of Applied Biochemistry, Tokai University School of Engineering, Kanagawa 259-1292, Japan
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217
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Danussi C, Coslovi A, Campa C, Mucignat MT, Spessotto P, Uggeri F, Paoletti S, Colombatti A. A newly generated functional antibody identifies Tn antigen as a novel determinant in the cancer cell-lymphatic endothelium interaction. Glycobiology 2009; 19:1056-67. [PMID: 19528665 PMCID: PMC2736043 DOI: 10.1093/glycob/cwp085] [Citation(s) in RCA: 227] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Malignant transformation of epithelial cells is frequently associated with the alteration of glycosylation pathways. Tn is a common tumor-associated carbohydrate antigen present in 90% of human carcinomas and its expression correlates with metastatic potential and poor prognosis. Despite its relevance, the functional role of Tn in tumor biology has not been firmly established probably for the lack of appropriate experimental tools. Our aims were to produce highly reactive monoclonal antibodies against Tn making use of synthetically produced Tn and to test their usefulness for in vivo imaging as well as to define their potential functional activity in tumor cell spread. We immunized mice with Tn clustered on cationized BSA and screened the positive hybridomas with Tn-biotinylated alginate. Enzyme-linked immuno sorbent assay and immunofluorescence assays revealed that the most reactive anti-Tn IgM mAb (2154F12A4) selectively recognized Tn on the MCF7 breast cancer cell line since its binding to the cell membrane was completely abolished by preincubation with purified Tn. Importantly, QDot 800-conjugated mAb injected in MCF7-tumor bearing mice specifically bound to primary tumor lesions as well as to metastases in lymph nodes. In addition, this mAb was able to inhibit cancer cell adhesion to lymphatic endothelium suggesting a novel involvement of Tn in the lymphatic dissemination of cancer cells and hypothesizing future applications in inhibiting lymphatic metastases.
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Affiliation(s)
- Carla Danussi
- Division of Experimental Oncology 2, Department of Molecular Oncology and Translational Research, CRO-IRCCS, 33081 Aviano, Pordenone, Italy
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