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Flores AR, Lemos I, Rema A, Taulescu M, Seixas F, Reis CA, Gärtner F, Amorim I. Tn and Sialyl-Tn antigens in canine gastric tissues. Vet Comp Oncol 2020; 18:615-625. [PMID: 32134186 DOI: 10.1111/vco.12586] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 02/24/2020] [Accepted: 03/02/2020] [Indexed: 12/16/2022]
Abstract
Malignant transformation is often associated with abnormal protein glycosylation expressed, amongst others, by the accumulation of simple mucin-type carbohydrates namely Tn and Sialyl-Tn (STn) antigens. These are usually limited in normal tissues and their increased expression has been associated with cancer progression and poor prognosis. This study aims to evaluate the role of Tn and STn antigens in the neoplastic transformation of the canine gastric mucosa and to correlate their putative immunoexpression alterations with some pathological features. Tn and STn antigens expression were immunohistochemically evaluated in canine normal gastric mucosa (n = 3), gastric polyps (n = 9) and gastric carcinomas (n = 25), neoplastic emboli (n = 12) and metastases (n = 8). In normal gastric mucosa, Tn antigen was detected in the gastric epithelial cells, while STn antigen was absent. Similarly, all gastric polyps expressed Tn antigen, but none displayed STn antigen immunostaining. In carcinomas, Tn antigen was expressed in 96% of the cases and STn antigen in 68% of the neoplasms. STn antigen was significantly higher in carcinomas compared with normal mucosa (P < .05). No correlation was found between each antigen and the different subtypes of tumours according to WHO classification, tumour differentiation, lymph vascular invasion or metastasis. All neoplastic emboli expressed both antigens, and the expression score was similar or higher than that displayed by the neoplastic cells of the primary tumour. The high prevalence of STn antigen in gastric carcinomas compared with normal mucosa highlights the cancer-associated nature of this antigen. Our results link STn antigen expression to neoplastic transformation and suggest that it may be a useful marker of gastric cancer progression in dogs.
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Affiliation(s)
- Ana R Flores
- Department of Pathology and Molecular Immunology of the Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal.,Institute of Molecular Pathology and Immunology, University of Porto (IPATIMUP), Porto, Portugal.,Center of Animal and Veterinary Sciences (CECAV), University of Trás-os-Montes e Alto Douro (UTAD), Vila Real, Portugal
| | - Isabel Lemos
- Department of Pathology and Molecular Immunology of the Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - Alexandra Rema
- Department of Pathology and Molecular Immunology of the Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - Marian Taulescu
- Department of Pathology, Faculty of Veterinary Medicine, University of Agricultural Sciences and Veterinary Medicine, Cluj-Napoca, Romania
| | - Fernanda Seixas
- Center of Animal and Veterinary Sciences (CECAV), University of Trás-os-Montes e Alto Douro (UTAD), Vila Real, Portugal
| | - Celso A Reis
- Institute of Molecular Pathology and Immunology, University of Porto (IPATIMUP), Porto, Portugal.,Institute for Research and Innovation in Health, (i3S), University of Porto, Porto, Portugal.,Department of Molecular Biology of the Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - Fátima Gärtner
- Department of Pathology and Molecular Immunology of the Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal.,Institute of Molecular Pathology and Immunology, University of Porto (IPATIMUP), Porto, Portugal.,Institute for Research and Innovation in Health, (i3S), University of Porto, Porto, Portugal
| | - Irina Amorim
- Department of Pathology and Molecular Immunology of the Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal.,Institute of Molecular Pathology and Immunology, University of Porto (IPATIMUP), Porto, Portugal.,Institute for Research and Innovation in Health, (i3S), University of Porto, Porto, Portugal
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Wei H, Cheng Z, Ouyang C, Zhang Y, Hu Y, Chen S, Wang C, Lu F, Zhang J, Wang Y, Liu X. Glycoprotein screening in colorectal cancer based on differentially expressed Tn antigen. Oncol Rep 2016; 36:1313-24. [DOI: 10.3892/or.2016.4937] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 03/02/2016] [Indexed: 11/06/2022] Open
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