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Gyulai M, Harko T, Fabian K, Karsko L, Agocs L, Szigeti B, Fillinger J, Szallasi Z, Pipek O, Moldvay J. Claudin expression in pulmonary adenoid cystic carcinoma and mucoepidermoid carcinoma. Pathol Oncol Res 2023; 29:1611328. [PMID: 37621953 PMCID: PMC10444951 DOI: 10.3389/pore.2023.1611328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Accepted: 07/27/2023] [Indexed: 08/26/2023]
Abstract
Background: Although the expression of tight junction protein claudins (CLDNs) is well known in common histological subtypes of lung cancer, it has not been investigated in rare lung cancers. The aim of our study was to examine the expression of different CLDNs in pulmonary salivary gland tumors. Methods: 35 rare lung cancers including pathologically confirmed 12 adenoid cystic carcinomas (ACCs) and 23 mucoepidermoid carcinomas (MECs) were collected retrospectively. Immunohistochemical (IHC) staining was performed on formalin fixed paraffin embedded (FFPE) tumor tissues, and CLDN1, -2, -3, -4, -5, -7, and -18 protein expressions were analyzed. The levels of immunopositivity were determined with H-score. Certain pathological characteristics of ACC and MEC samples (tumor grade, presence of necrosis, presence of blood vessel infiltration, and degree of lymphoid infiltration) were also analyzed. Results: CLDN overexpression was observed in both tumor types, especially in CLDN2, -7, and -18 IHC. Markedly different patterns of CLDN expression were found for ACC and MEC tumors, especially for CLDN1, -2, -4, and -7, although none of these trends remained significant after correction for multiple testing. Positive correlations between expressions of CLDN2 and -5, CLDN3 and -4, and CLDN5 and -18 were also demonstrated. Tumors of never-smokers presented lower levels of CLDN18 than tumors of current smokers (p-value: 0.003). Conclusion: This is the first study to comprehensively describe the expression of different CLDNs in lung ACC and MEC. Overexpression of certain CLDNs may pave the way for targeted anti-claudin therapy in these rare histological subtypes of lung cancer.
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Affiliation(s)
- Marton Gyulai
- County Institute of Pulmonology, Torokbalint, Hungary
- Karoly Racz Doctoral School of Clinical Medicine, Semmelweis University, Budapest, Hungary
| | - Tunde Harko
- Department of Pathology, National Koranyi Institute of Pulmonology, Budapest, Hungary
| | - Katalin Fabian
- Department of Pathology, South-Buda Center Hospital St. Imre University Teaching Hospital, Budapest, Hungary
| | - Luca Karsko
- Department of Thoracic Surgery, National Koranyi Institute of Pulmonology, Budapest, Hungary
| | - Laszlo Agocs
- Department of Thoracic Surgery, National Koranyi Institute of Pulmonology, Budapest, Hungary
- Department of Thoracic Surgery, National Institute of Oncology, Semmelweis University, Budapest, Hungary
| | - Balazs Szigeti
- Department of Pathology, National Koranyi Institute of Pulmonology, Budapest, Hungary
| | - Janos Fillinger
- Department of Pathology, National Koranyi Institute of Pulmonology, Budapest, Hungary
| | - Zoltan Szallasi
- National Koranyi Institute of Pulmonology, Budapest, Hungary
- Department of Bioinformatics, Semmelweis University, Budapest, Hungary
- Computational Health Informatics Program, Boston Children’s Hospital, Harvard Medical School, Boston, MA, United States
- Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Orsolya Pipek
- Department of Physics of Complex Systems, ELTE Eotvos Lorand University, Budapest, Hungary
| | - Judit Moldvay
- Ist Department of Pulmonology, National Koranyi Institute of Pulmonology, Budapest, Hungary
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Stoeckelhuber M, Grill FD, Wolff KD, Kesting MR, Wolff CT, Fichter AM, Loeffelbein DJ, Schmitz C, Ritschl LM. Infantile human labial glands: Distribution of aquaporins and claudins in the context of paracellular and transcellular pathways. Tissue Cell 2023; 82:102052. [PMID: 36905859 DOI: 10.1016/j.tice.2023.102052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 02/27/2023] [Accepted: 03/01/2023] [Indexed: 03/06/2023]
Abstract
Human labial glands consist of saliva-secreting cells which are formed by serous and predominantly mucous glandular cells. The following excretory duct system converts the isotonic saliva into a hypotonic fluid. Liquids are transported across the membrane of epithelial cells by paracellular or transcellular mode of action. We studied aquaporins (AQP) and tight junction proteins in the endpieces and duct system of human labial glands of 3-5-month-old infants for the first time. AQP1, AQP3, and AQP5 represent the transcellular transport; tight junction proteins like claudin-1, - 3, - 4, and - 7 regulate the permeability of the paracellular pathway. Specimens of 28 infants were included in this study and analyzed histologically. AQP1 was present in myoepithelial cells and in endothelial cells of small blood vessels. AQP3 showed basolateral plasmamembrane localization in glandular endpieces. AQP5 was localized at the apical cytomembrane in serous and mucous glandular cells and at the lateral membrane in serous cells. Ducts remained unstained with the antibody to AQP1, AQP3, and AQP5. Claudin-1, - 3, - 4, and - 7 were expressed mainly in the lateral plasmamembrane of serous glandular cells. In the ducts, claudin-1, - 4, and - 7 were detected at the basal cell layer, claudin-7 also at the lateral cytomembrane. Our findings provide new insights into the localization of epithelial barrier components necessary for regulating saliva-modification in infantile labial glands.
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Affiliation(s)
- Mechthild Stoeckelhuber
- Department of Oral and Maxillofacial Surgery, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany.
| | - Florian D Grill
- Department of Oral and Maxillofacial Surgery, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Klaus-Dietrich Wolff
- Department of Oral and Maxillofacial Surgery, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Marco R Kesting
- Department of Oral and Maxillofacial Surgery, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nuernberg, Erlangen, Germany
| | - Constantin T Wolff
- Department of Oral and Maxillofacial Surgery, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Andreas M Fichter
- Department of Oral and Maxillofacial Surgery, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Denys J Loeffelbein
- Department of Oral and Maxillofacial Surgery, Helios Hospital Munich West, Teaching Hospital of Ludwig-Maximilians-University of Munich, Munich, Germany
| | - Christoph Schmitz
- Department of Anatomy II, Faculty of Medicine, Ludwig-Maximilians-University of Munich, Munich, Germany
| | - Lucas M Ritschl
- Department of Oral and Maxillofacial Surgery, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
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Arrojo ML, Oliveira KK, Bettim BB, Kowalski LP, Carraro DM, Meira ITJE, Torrezan GT, Lourenço SV, Coutinho-Camillo CM. Tight junction gene expression in salivary gland tumors. Pathol Res Pract 2022; 238:154113. [PMID: 36099718 DOI: 10.1016/j.prp.2022.154113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 08/29/2022] [Accepted: 08/31/2022] [Indexed: 11/18/2022]
Abstract
Salivary gland neoplasms comprise a heterogeneous group of lesions with multiple histological subtypes, each with distinct growth patterns, resulting in a spectrum of tumor-specific prognoses; pleomorphic adenoma (PA) and mucoepidermoid carcinoma (MEC) are the most common representatives of these neoplasms. Many studies have associated specific profiles of membrane and adhesion molecules in salivary gland tissues; these profiles appear to be relevant in tumor biology as well as be interpreted as fingerprints for tumor classification, diagnostic prognostic and therapeutic targets. One of these membrane molecule complexes are the tight junctions, composed by various proteins, in which claudins are protagonists. The aim of this study was to evaluate the expressions of genes that encode tight junction proteins (CLDN-1, -3, -4, -5, -7, and -11, occludin [OCLN], zonula occludens [TJP1, TJP2, and TJP3] and junctional adhesion molecule A [F11R]) in MEC and PA using real time RT-PCR. We observed high expression of CLDN-1 and -7 and low expression of CLDN-3, -11 and TJP2 in MEC compared to PA. PA samples demonstrated high OCLN expression when compared to MEC. CRTC1::MAML2 fusion was detected in 12 of 20 (60.0%) MEC samples and was associated with CLDN7 expression, while the absence of fusion was associated with high histological grade. Increased CLDN5 expression was associated with submandibular gland tumors. This study demonstrated differential expressions of genes encoding tight junction constituent proteins and their associations with tumor characteristics, suggesting their potential future role as diagnostic and prognostic markers.
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Affiliation(s)
- Maria Luiza Arrojo
- International Research Center, A.C.Camargo Cancer Center, São Paulo, Brazil
| | | | | | - Luiz Paulo Kowalski
- Department of Head and Neck Surgery and Otorhinolaryngology, A.C.Camargo Cancer Center, São Paulo, Brazil
| | - Dirce Maria Carraro
- Clinical and Functional Genomics Group, International Research Center A.C.Camargo Cancer Center, São Paulo, Brazil
| | - Isabella Tanus Job E Meira
- Clinical and Functional Genomics Group, International Research Center A.C.Camargo Cancer Center, São Paulo, Brazil
| | - Giovana Tardin Torrezan
- Clinical and Functional Genomics Group, International Research Center A.C.Camargo Cancer Center, São Paulo, Brazil
| | - Silvia Vanessa Lourenço
- Department of General Pathology, Dental School, University of São Paulo, São Paulo, SP, Brazil
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Withaferin A mitigates metastatic traits in human oral squamous cell carcinoma caused by aberrant claudin-1 expression. Cell Biol Toxicol 2021; 38:147-165. [PMID: 33665778 DOI: 10.1007/s10565-021-09584-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 01/24/2021] [Indexed: 12/27/2022]
Abstract
Abnormal expression of claudin-1 (CLDN1) has important roles in carcinogenesis and metastasis in various cancers. The role of CLDN1 in human oral squamous cell carcinoma (OSCC) remains unknown. Here, we report the functional role of CLDN1 in metastasis of human OSCC, as a potential target regulated by withaferin A. From gene expression profiling with microarray technology, we found that the majority of notable differentially expressed genes were classified into migration/invasion category. Withaferin A impaired the motility of human OSCC cells in vitro and suppressed metastatic nodule formation in an in vivo metastasis model, both associated with reduced CLDN1. CLDN1 overexpression enhanced metastatic nodule formation in vivo, resulting in severe metastatic lesions in lung tissue. Moreover, CLDN1 expression was positively correlated to lymphatic metastasis in OSCC patients. The impaired motility of human OSCC cells upon withaferin A treatment was restored by CLDN1 overexpression. Furthermore, upregulation of let-7a induced by withaferin A was inversely correlated to CLDN1 expression. Overall, these give us an insight into the function of CLDN1 for prognosis and treatment of human OSCC, substantiating further investigation into the use of withaferin A as good anti-metastatic drug candidate.
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Uc PY, Miranda J, Raya-Sandino A, Alarcón L, Roldán ML, Ocadiz-Delgado R, Cortés-Malagón EM, Chávez-Munguía B, Ramírez G, Asomoza R, Shoshani L, Gariglio P, González-Mariscal L. E7 oncoprotein from human papillomavirus 16 alters claudins expression and the sealing of epithelial tight junctions. Int J Oncol 2020; 57:905-924. [PMID: 32945372 PMCID: PMC7473757 DOI: 10.3892/ijo.2020.5105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Accepted: 04/16/2020] [Indexed: 11/24/2022] Open
Abstract
Tight junctions (TJs) are cell-cell adhesion structures frequently altered by oncogenic transformation. In the present study the role of human papillomavirus (HPV) 16 E7 oncoprotein on the sealing of TJs was investigated and also the expression level of claudins in mouse cervix and in epithelial Madin-Darby Canine Kidney (MDCK) cells. It was found that there was reduced expression of claudins -1 and -10 in the cervix of 7-month-old transgenic K14E7 mice treated with 17β-estradiol (E2), with invasive cancer. In addition, there was also a transient increase in claudin-1 expression in the cervix of 2-month-old K14E7 mice, and claudin-10 accumulated at the border of cells in the upper layer of the cervix in FvB mice treated with E2, and in K14E7 mice treated with or without E2. These changes were accompanied by an augmented paracellular permeability of the cervix in 2- and 7-monthold FvB mice treated with E2, which became more pronounced in K14E7 mice treated with or without E2. In MDCK cells the stable expression of E7 increased the space between adjacent cells and altered the architecture of the monolayers, induced the development of an acute peak of transepithelial electrical resistance accompanied by a reduced expression of claudins -1, -2 and -10, and an increase in claudin-4. Moreover, E7 enhances the ability of MDCK cells to migrate through a 3D matrix and induces cell stiffening and stress fiber formation. These observations revealed that cell transformation induced by HPV16 E7 oncoprotein was accompanied by changes in the pattern of expression of claudins and the degree of sealing of epithelial TJs.
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Affiliation(s)
- Perla Yaceli Uc
- Department of Physiology, Biophysics and Neuroscience, Center for Research and Advanced Studies, Mexico City 07360, Mexico
| | - Jael Miranda
- Department of Physiology, Biophysics and Neuroscience, Center for Research and Advanced Studies, Mexico City 07360, Mexico
| | - Arturo Raya-Sandino
- Department of Physiology, Biophysics and Neuroscience, Center for Research and Advanced Studies, Mexico City 07360, Mexico
| | - Lourdes Alarcón
- Department of Physiology, Biophysics and Neuroscience, Center for Research and Advanced Studies, Mexico City 07360, Mexico
| | - María Luisa Roldán
- Department of Physiology, Biophysics and Neuroscience, Center for Research and Advanced Studies, Mexico City 07360, Mexico
| | - Rodolfo Ocadiz-Delgado
- Department of Genetics and Molecular Biology, Center for Research and Advanced Studies, Mexico City 07360, Mexico
| | - Enoc Mariano Cortés-Malagón
- Research Unit on Genetics and Cancer, Research Division, Hospital Juárez de México, Mexico City 07760, Mexico
| | - Bibiana Chávez-Munguía
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies, Mexico City 07360, Mexico
| | - Georgina Ramírez
- Department of Electrical Engineering, Center for Research and Advanced Studies, Mexico City 07360, Mexico
| | - René Asomoza
- Department of Electrical Engineering, Center for Research and Advanced Studies, Mexico City 07360, Mexico
| | - Liora Shoshani
- Department of Physiology, Biophysics and Neuroscience, Center for Research and Advanced Studies, Mexico City 07360, Mexico
| | - Patricio Gariglio
- Department of Genetics and Molecular Biology, Center for Research and Advanced Studies, Mexico City 07360, Mexico
| | - Lorenza González-Mariscal
- Department of Physiology, Biophysics and Neuroscience, Center for Research and Advanced Studies, Mexico City 07360, Mexico
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Sawant PR, Spadigam A, Dhupar A, Syed S, Carvalho K. Assessing the prognostic significance of MUC4β in mucoepidermoid carcinoma of the salivary glands: An immunohistochemical study. Heliyon 2019; 5:e02753. [PMID: 31844699 PMCID: PMC6895766 DOI: 10.1016/j.heliyon.2019.e02753] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 08/05/2019] [Accepted: 10/25/2019] [Indexed: 12/12/2022] Open
Abstract
Objectives – Routine histopathological grading for salivary gland mucoepidermoid carcinoma (MEC) have failed to prognosticate these tumors, resulting in poor post-surgical outcomes. In developing countries, the lack of technologically advanced infrastructure curtails, efficient treatment modalities. This study aimed at determining if MUC4β can characterize salivary gland MEC and serve as a practical and inexpensive method to prognosticate salivary gland MEC. Materials and methods – Fifteen cases of archived paraffin embedded tissue blocks of mucoepidermoid carcinomas were reassessed for histopathological grading using Healey's system, modified by Batsakis and Luna and immunohistochemically evaluated for expression of MUC4β. Statistical analysis (Kappa statistics and Spearman's rho correlation coefficient) was performed to assess inter-observer reproducibility and to correlate the expression of MUC4β with the histopathological grade of the tumor. Results MUC4β expression is related to tumor differentiation in an inverse relationship. Two cases of high grade MEC were the exception to this rule. Conclusion Our study revealed that MUC4β alone cannot serve as a reliable prognostic marker due to its divergent tumor suppressor and oncogenic pathway. The role of MUC4β needs further evaluation and research so as to potentiate therapeutics depending upon its context dependent function, as a cancer marker or an oncogenic factor.
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Affiliation(s)
- Poonam R Sawant
- Department of Oral & Maxillofacial Pathology, Goa Dental College & Hospital, Bambolim, Goa, 403202, India
| | - Anita Spadigam
- Department of Oral & Maxillofacial Pathology, Goa Dental College & Hospital, Bambolim, Goa, 403202, India
| | - Anita Dhupar
- Department of Oral & Maxillofacial Pathology, Goa Dental College & Hospital, Bambolim, Goa, 403202, India
| | - Shaheen Syed
- Department of Oral & Maxillofacial Pathology, Goa Dental College & Hospital, Bambolim, Goa, 403202, India
| | - Karla Carvalho
- Department of Oral & Maxillofacial Pathology, Goa Dental College & Hospital, Bambolim, Goa, 403202, India
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7
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Aoyama T, Takasawa A, Murata M, Osanai M, Takano K, Hasagawa T, Sawada N. Immunoreactivity patterns of tight junction proteins are useful for differential diagnosis of human salivary gland tumors. Med Mol Morphol 2018; 52:23-35. [PMID: 29955965 DOI: 10.1007/s00795-018-0199-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Accepted: 06/18/2018] [Indexed: 01/03/2023]
Abstract
The expression pattern of tight junction proteins (TJPs) varies among organs and tumor types. In this study, we examined the immunoreactivity of claudin (CLDN)-1, -4, and -7, and JAM-A in salivary gland tumors (SGTs) by histological types and cell types to estimate their usefulness as differential diagnostic markers. Immunoreactivity of CLDN1 was higher in ductal epithelium cells of SGTs than in non-tumor tissues. Conversely, immunoreactivity of CLDN1 was significantly decreased in basal/myoepithelium cells of SGTs compared with that in non-tumor tissues. There was no significant difference between the immunoreactivity of CLDN1 in benign tumors and that in malignant tumors. Immunoreactivity of CLDN4, CLDN7, and JAM-A in ductal epithelium cells was higher in many SGTs than in non-tumor tissues. There was a difference depending on the histological type of SGT in immunoreactivity of CLDN4, CLDN7, and JAM-A in basaloid/myoepithelial cells. It was possible to classify SGTs by a hierarchical clustering using immunoreactivity of TJPs. The results suggest that an immunohistochemical marker panel including these TJPs may be useful for differential diagnosis of SGTs and that CLDN1 is associated with tumorigenesis of SGTs.
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Affiliation(s)
- Tomoyuki Aoyama
- Department of Pathology, Sapporo Medical University School of Medicine, S1. W17, Sapporo, 060-8556, Japan.,Department of Surgical Pathology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Akira Takasawa
- Department of Pathology, Sapporo Medical University School of Medicine, S1. W17, Sapporo, 060-8556, Japan
| | - Masaki Murata
- Department of Pathology, Sapporo Medical University School of Medicine, S1. W17, Sapporo, 060-8556, Japan.
| | - Makoto Osanai
- Department of Pathology, Sapporo Medical University School of Medicine, S1. W17, Sapporo, 060-8556, Japan
| | - Kenichi Takano
- Department of Otolaryngology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Tadashi Hasagawa
- Department of Surgical Pathology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Norimasa Sawada
- Department of Pathology, Sapporo Medical University School of Medicine, S1. W17, Sapporo, 060-8556, Japan
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Salivary mucoepidermoid carcinoma revisited. Eur Arch Otorhinolaryngol 2014; 272:799-819. [PMID: 24771140 DOI: 10.1007/s00405-014-3053-z] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2014] [Accepted: 04/07/2014] [Indexed: 12/29/2022]
Abstract
Clinicopathological features, prognosis and therapeutic strategies for mucoepidermoid carcinoma originating in salivary and salivary-type glands of the head and neck are reviewed. We emphasise histopathological aspects, appraise the value of histochemistry, electron microscopy, immunohistochemistry and cytophotometry, and discuss histogenesis and characteristic gene translocations. We additionally consider possible diagnostic difficulties, problems related to histological grading and accuracy of existing literature, and areas of controversy or uncertainty which may benefit from further investigations.
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Korvala J, Harjula T, Siirilä K, Almangush A, Aro K, Mäkitie AA, Grénman R, Karttunen TJ, Leivo I, Kauppila JH, Salo T. Toll-like receptor 9 expression in mucoepidermoid salivary gland carcinoma may associate with good prognosis. J Oral Pathol Med 2014; 43:530-7. [DOI: 10.1111/jop.12160] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/12/2013] [Indexed: 12/29/2022]
Affiliation(s)
- Johanna Korvala
- Department of Dentistry; University of Oulu; Oulu Finland
- Medical Research Center Oulu; Oulu Finland
| | - Teresa Harjula
- Department of Dentistry; University of Oulu; Oulu Finland
| | | | - Alhadi Almangush
- Institute of Dentistry; University of Helsinki; Helsinki Finland
| | - Katri Aro
- Department of Otorhinolaryngology; Helsinki University Central Hospital and University of Helsinki; Helsinki Finland
| | - Antti A. Mäkitie
- Department of Otorhinolaryngology; Helsinki University Central Hospital and University of Helsinki; Helsinki Finland
| | - Reidar Grénman
- Department of Otorhinolaryngology, Head and Neck Surgery; Turku University Hospital and University of Turku; Turku Finland
| | - Tuomo J. Karttunen
- Medical Research Center Oulu; Oulu Finland
- Department of Pathology; University of Oulu; Oulu Finland
- Oulu University Hospital; Oulu Finland
| | - Ilmo Leivo
- Department of Otorhinolaryngology, Head and Neck Surgery; Turku University Hospital and University of Turku; Turku Finland
| | - Joonas H. Kauppila
- Medical Research Center Oulu; Oulu Finland
- Department of Pathology; University of Oulu; Oulu Finland
- Oulu University Hospital; Oulu Finland
- Department of Surgery; University of Oulu; Oulu Finland
| | - Tuula Salo
- Department of Dentistry; University of Oulu; Oulu Finland
- Medical Research Center Oulu; Oulu Finland
- Institute of Dentistry; University of Helsinki; Helsinki Finland
- Oulu University Hospital; Oulu Finland
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10
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Abd El-Ghani SF, Kasem RF, Ghallab NA, Shaker OG. Detection of claudin-4 in salivary gland neoplasms (a study utilizing RT-PCR and immunohistochemistry). J Oral Pathol Med 2013; 42:781-7. [PMID: 23614611 DOI: 10.1111/jop.12070] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/22/2013] [Indexed: 02/03/2023]
Abstract
BACKGROUND Claudins are transmembrane proteins of tight junctions emerging as targets for diagnosis, prediction of prognosis, disease recurrence, and metastasis. Our goal was to evaluate expression of claudin-4 in the most common benign and malignant salivary gland neoplasms. METHODS Claudin-4 gene levels and protein expression were determined by real-time polymerase chain reaction (PCR), and immunohistochemistry in a total of 30 specimens containing normal salivary tissue, pleomorphic adenoma, Warthin's tumor, mucoepidermoid carcinoma, and adenoid cystic carcinoma. RESULTS We identified down-regulation of claudin-4 gene levels and protein expression from normal control to benign salivary gland neoplasms and reached their lowest values in the malignant salivary gland neoplasms. CONCLUSIONS Low claudin-4 expression could be considered as a sign of increasing cellular disorientation and invasion of salivary gland tumors.
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Affiliation(s)
- Safa F Abd El-Ghani
- Department of Oral Pathology, Faculty of Oral and Dental Medicine, Cairo University, Cairo, Egypt
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11
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Regulation of Tight Junctions for Therapeutic Advantages. CANCER METASTASIS - BIOLOGY AND TREATMENT 2013. [DOI: 10.1007/978-94-007-6028-8_9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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12
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Ouban A, Hamdan H, Hakam A, Ahmed AA. Claudin-1 expression in squamous cell carcinomas of different organs: comparative study of cancerous tissues and normal controls. Int J Surg Pathol 2011; 20:132-8. [PMID: 21997594 DOI: 10.1177/1066896911424488] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Claudins are the main sealing proteins of the intercellular tight junctions and play an important role in cancer cell progression and dissemination. This study examined and compared the expression of claudin-1 by immunohistochemistry in 60 squamous cell carcinomas of different tissue types and normal 33 controls, arranged in 2 tissue microarray slides. A score was generated to classify claudin-1 expression into negative, low, medium, and high. Most squamous cell carcinomas (91.67%) showed positive membranous staining. Medium to high claudin-1 expression was prevalent in carcinomas from the head-neck, skin, and genitourinary regions and was less frequent in other locations. An inverse correlation was noted between claudin-1 expression and tumor grade in tumors of the genitourinary and breast-gynecologic regions. Of the normal organs, significant claudin-1 expression was present mainly in the skin whereas other epithelial tissues had only minimal to low expression levels. Claudin-1 expression in squamous cell carcinoma varies in organ-specific manner reflecting influence of local factors and different mechanisms of claudin-1 expression. Knowledge of this fact is important in planning biologic therapy targeting claudin-1.
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