1
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Wiseman L, Cinti N, Guinn BA. Identification and prioritization of tumour-associated antigens for immunotherapeutic and diagnostic capacity in epithelial ovarian cancer: a systematic literature review. Carcinogenesis 2022; 43:1015-1029. [PMID: 36318800 DOI: 10.1093/carcin/bgac084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 09/18/2022] [Accepted: 10/31/2022] [Indexed: 12/15/2022] Open
Abstract
Epithelial ovarian cancer (EOC) is a prevalent carcinoma in the female population associated with poor prognostic outcomes, in part due to the late stage of the disease at diagnosis. Aiming to identify tumour-associated antigens (TAAs) with the potential to facilitate earlier detection and targeted therapy of EOC, five scientific literature repositories were systemically searched for primary literature sources reporting the expression of a TAA in the tissue or serum of adult females diagnosed with EOC and healthy women. We identified 7120 articles of which 32 met our inclusion criteria and passed the bias-quality assessment. Subsequently, data were collated on 29 TAAs whose expression had been analysed in 2181 patients and 589 healthy individuals. Reports of CA125 and EpCAM expression were numerous while tissue expression data were available for 28 TAAs. Data were segregated into three meta-cohorts for statistical scrutiny and their capacity for diagnostic and treatment targeting was assessed. We showed that CA-125 was expressed homogenously in EOC patients while EpCAM was expressed heterogeneously. CA-125 was the most promising TAA target for both diagnosis and treatment, gaining a priority score of 12 (/12) while EpCAM gained a priority score of seven. Tissue expression of EOC TAAs was homogenous; 90% of the EOC population express any identified TAA while just 20% of healthy individuals will be positive for the same TAA. We suggest TAA profiling should be a fundamental aspect of EOC diagnosis, sitting alongside the FIGO framework, promoting reduced mortality and directing the development of TAA-targeted therapeutics.
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Affiliation(s)
- Lucy Wiseman
- Centre for Biomedicine, Hull York Medical School, University of Hull, Hull HU6 7RX, UK
| | - Noemi Cinti
- Centre for Biomedicine, Hull York Medical School, University of Hull, Hull HU6 7RX, UK
| | - Barbara-Ann Guinn
- Centre for Biomedicine, Hull York Medical School, University of Hull, Hull HU6 7RX, UK
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2
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Popova OP, Kuznetsova AV, Bogomazova SY, Ivanov AA. Claudins as biomarkers of differential diagnosis and prognosis of tumors. J Cancer Res Clin Oncol 2021; 147:2803-2817. [PMID: 34241653 DOI: 10.1007/s00432-021-03725-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 06/30/2021] [Indexed: 12/30/2022]
Abstract
Claudins are a superfamily of transmembrane proteins, the optimal expression and localization of which are important for the normal physiological function of the epithelium and any imbalance may have pathological consequences. Not only insufficient but also excessive production of claudins in cancer cells, as well as their aberrant localization, equally manifest the formation of a malignant phenotype. Many works are distinguished by contradictory data, which demonstrate the action of the same claudins both in the role of tumor-growth suppressors and promoters in the same cancers. The most important possible causes of significant discrepancies in the results of the works are a considerable variability of sampling and the absence of a consistent approach both to the assessment of the immune reactivity of claudins and to the differential analysis of their subcellular localization. Combined, these drawbacks hinder the histological assessment of the link between claudins and tumor progression. In particular, ambiguous expression of claudins in breast cancer subtypes, revealed by various authors in immunohistochemical analysis, not only fails to facilitate the identification of the claudin-low molecular subtype but rather complicates these efforts. Research into the role of claudins in carcinogenesis has undoubtedly confirmed the potential value of this class of proteins as significant biomarkers in some cancer types; however, the immunohistochemical approach to the assessment of claudins still has limitations, needs standardization, and, to date, has not reached a diagnostic or a prognostic value.
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Affiliation(s)
- Olga P Popova
- A.I. Evdokimov Moscow State University of Medicine and Dentistry, Ministry of Health of the Russian Federation, 20, Bld 1, Delegatskaya Street, Moscow, 127473, Russia
| | - Alla V Kuznetsova
- A.I. Evdokimov Moscow State University of Medicine and Dentistry, Ministry of Health of the Russian Federation, 20, Bld 1, Delegatskaya Street, Moscow, 127473, Russia.,Koltzov Institute of Developmental Biology, Russian Academy of Sciences, 26 Vavilov Street, Moscow, 119334, Russia
| | - Svetlana Yu Bogomazova
- Department of Pathology, National Medical Research Treatment and Rehabilitation Centre, Ministry of Health of the Russian Federation, Ivankovskoe shosse, 3, Moscow, 125367, Russia
| | - Alexey A Ivanov
- A.I. Evdokimov Moscow State University of Medicine and Dentistry, Ministry of Health of the Russian Federation, 20, Bld 1, Delegatskaya Street, Moscow, 127473, Russia.
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3
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Romani C, Zizioli V, Silvestri M, Ardighieri L, Bugatti M, Corsini M, Todeschini P, Marchini S, D'Incalci M, Zanotti L, Ravaggi A, Facchetti F, Gambino A, Odicino F, Sartori E, Santin AD, Mitola S, Bignotti E, Calza S. Low Expression of Claudin-7 as Potential Predictor of Distant Metastases in High-Grade Serous Ovarian Carcinoma Patients. Front Oncol 2020; 10:1287. [PMID: 32850397 PMCID: PMC7417514 DOI: 10.3389/fonc.2020.01287] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 06/22/2020] [Indexed: 12/15/2022] Open
Abstract
High-grade serous ovarian carcinoma (HGSOC) usually spreads directly into the peritoneal cavity following a transcoelomic dissemination route, although distant hematogenous metastasis exist and have been reported. However, no tumor markers can currently predict the risk of distant metastases in HGSOC. Claudins, belonging to tight-junction proteins, are dysregulated in HGSOC and functionally related to cancer progression. Here we analyzed claudin-3, -4, and -7 expression as potential markers of distant metastases. Using quantitative RT-PCR and immunohistochemistry we assessed the expression of claudins in primary HGSOC tissues, normal ovarian, and normal fallopian tube epithelia and correlated it with clinicopathological features, including the site of metastasis and the route of dissemination. Gene set enrichment analysis was performed on microarray-generated gene expression data to investigate key pathways in patients with distant metastases. We found the overall expression level of claudin-3, -4, and -7 mRNA decreased in HGSOC compared to normal tubal epithelium, currently considered the potential site of origin of many HGSOC. The reduced expression of claudin-7 is significantly associated with the development of distant metastases (p = 0.016), mainly by hematogenous route (p = 0.025). In patients with diminished expression of claudin-7, immunohistochemical staining revealed a heterogeneous pattern of membranous staining with discontinuous expression of claudin-7 along the cell border, indicative of a dischoesive architecture. The estimated reduction in the probability of distant disease is of 39% per unit increase in the level of claudin-7 (p = 0.03). Genes involved in epithelial to mesenchymal transition, hypoxia, and angiogenesis processes resulted strongly associated to hematogenous recurrence. Our data suggest a potential role of claudin-7 in discriminating distant metastatic events in HGSOC patients. The quantification of its expression levels could be a useful tool to identify patient deserving a personalized follow-up in terms of clinical and radiological assessment.
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Affiliation(s)
- Chiara Romani
- Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
- Division of Obstetrics and Gynecology, ‘Angelo Nocivelli’ Institute of Molecular Medicine, University of Brescia and ASST-Spedali Civili of Brescia, Brescia, Italy
| | - Valentina Zizioli
- Division of Obstetrics and Gynecology, ASST Spedali Civili di Brescia, Brescia, Italy
| | - Marco Silvestri
- Biomarkers Unit, Department of Applied Research and Technological Development, Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Milan, Italy
- Unit of Biostatistics and Bioinformatics, Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
| | - Laura Ardighieri
- Department of Pathology, ASST Spedali Civili of Brescia, Brescia, Italy
| | - Mattia Bugatti
- Department of Pathology, ASST Spedali Civili of Brescia, Brescia, Italy
| | - Michela Corsini
- Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
| | - Paola Todeschini
- Division of Obstetrics and Gynecology, ASST Spedali Civili di Brescia, Brescia, Italy
| | - Sergio Marchini
- Department of Oncology, IRCCS, “Mario Negri” Institute for Pharmacological Research, Milan, Italy
| | - Maurizio D'Incalci
- Department of Oncology, IRCCS, “Mario Negri” Institute for Pharmacological Research, Milan, Italy
| | - Laura Zanotti
- Division of Obstetrics and Gynecology, ASST Spedali Civili di Brescia, Brescia, Italy
| | - Antonella Ravaggi
- Division of Obstetrics and Gynecology, ‘Angelo Nocivelli’ Institute of Molecular Medicine, University of Brescia and ASST-Spedali Civili of Brescia, Brescia, Italy
- Division of Obstetrics and Gynecology, ASST Spedali Civili di Brescia, Brescia, Italy
- Division of Obstetrics and Gynecology, Department of Clinical and Experimental Sciences University of Brescia, Brescia, Italy
| | - Fabio Facchetti
- Department of Pathology, ASST Spedali Civili of Brescia, Brescia, Italy
| | - Angela Gambino
- Division of Obstetrics and Gynecology, ASST Spedali Civili di Brescia, Brescia, Italy
- Division of Obstetrics and Gynecology, Department of Clinical and Experimental Sciences University of Brescia, Brescia, Italy
| | - Franco Odicino
- Division of Obstetrics and Gynecology, ASST Spedali Civili di Brescia, Brescia, Italy
- Division of Obstetrics and Gynecology, Department of Clinical and Experimental Sciences University of Brescia, Brescia, Italy
| | - Enrico Sartori
- Division of Obstetrics and Gynecology, ASST Spedali Civili di Brescia, Brescia, Italy
- Division of Obstetrics and Gynecology, Department of Clinical and Experimental Sciences University of Brescia, Brescia, Italy
| | - Alessandro Davide Santin
- Department of Obstetrics, Gynecology and Reproductive Sciences, Yale University School of Medicine, New Haven, CT, United States
| | - Stefania Mitola
- Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
| | - Eliana Bignotti
- Division of Obstetrics and Gynecology, ‘Angelo Nocivelli’ Institute of Molecular Medicine, University of Brescia and ASST-Spedali Civili of Brescia, Brescia, Italy
- Division of Obstetrics and Gynecology, ASST Spedali Civili di Brescia, Brescia, Italy
| | - Stefano Calza
- Unit of Biostatistics and Bioinformatics, Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
- Big & Open Data Innovation Laboratory, University of Brescia, Brescia, Italy
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4
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Quan JC, Peng J, Guan X, Liu Z, Jiang Z, Chen HP, Zhuang M, Wang S, Sun P, Wang HY, Zou SM, Wang XS. Evaluation of clinical significance of claudin 7 and construction of prognostic grading system for stage II colorectal cancer. World J Clin Cases 2020; 8:2190-2200. [PMID: 32548149 PMCID: PMC7281043 DOI: 10.12998/wjcc.v8.i11.2190] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Revised: 04/27/2020] [Accepted: 05/18/2020] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Claudin 7 is often abnormally expressed in cancers and promotes the progression of some malignancies. However, the role of claudin 7 in stage II colorectal cancer (CRC) has not been studied.
AIM To assess the expression and prognostic value of claudin 7 in stage II CRC.
METHODS We retrospectively studied 231 stage II CRC patients who underwent radical surgery at our hospital from 2013 to 2014. The protein expression level of claudin 7 was assessed and its relationship with clinicopathological features and prognosis was statistically analyzed. The independent prognostic factors were identified by Cox proportional hazards models. A prognostic grading system was constructed to stratify the survival of CRC patients.
RESULTS The expression of claudin 7 was significantly reduced in cancer tissues compared with normal tissues (P < 0.001), and its low expression was closely related to recurrence of the disease (P = 0.017). Multivariate analysis confirmed that claudin 7 low expression (claudin 7-low) (P = 0.028) and perineural invasion positivity (PNI+) (P = 0.026) were independent predictors of poor disease-free survival (DFS). A prognostic grading system based on the status of claudin 7 and PNI classified the patients into three prognostic grades: grade A (claudin 7-high and PNI-), grade B (claudin 7-low and PNI-, claudin 7-high and PNI+), and grade C (claudin 7-low and PNI+). The DFS was significantly different among the three grades (grade B vs grade A, P = 0.032; grade C vs grade A, P < 0.001; grade C vs grade B, P = 0.040).
CONCLUSION Claudin 7 can be used as a new prognostic marker to predict the DFS of patients with stage II CRC. The prognostic grading system with the addition of claudin 7 can further improve prognosis stratification of patients.
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Affiliation(s)
- Ji-Chuan Quan
- Department of Colorectal Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Jian Peng
- State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Xu Guan
- Department of Colorectal Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Zheng Liu
- Department of Colorectal Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Zheng Jiang
- Department of Colorectal Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Hai-Peng Chen
- Department of Colorectal Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Meng Zhuang
- Department of Colorectal Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Song Wang
- Department of Colorectal Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin 150081, Heilongjiang Province, China
| | - Peng Sun
- Department of Colorectal Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin 150081, Heilongjiang Province, China
| | - Hong-Ying Wang
- State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Shuang-Mei Zou
- Department of Pathology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Xi-Shan Wang
- Department of Colorectal Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
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5
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Ji H, Ding X, Zhang W, Zheng Y, Du H, Zheng Y, Song H, Li M, Jiang Y, Xie J, Wu M, Jiao P, Wang Z, Wu H, Zhong Y. Claudin-7 Inhibits Proliferation and Metastasis in Salivary Adenoid Cystic Carcinoma Through Wnt/β-Catenin Signaling. Cell Transplant 2020; 29:963689720943583. [PMID: 32749148 PMCID: PMC7563826 DOI: 10.1177/0963689720943583] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 06/14/2020] [Accepted: 06/25/2020] [Indexed: 12/23/2022] Open
Abstract
The aim of this study was to investigate claudin-7 (CLDN7) expression in salivary adenoid cystic carcinoma (SACC) and its function in SACC cells. We determined CLDN7 expression in SACC tumors via immunohistochemistry and western blotting and evaluated the association between CLDN7 expression and clinicopathologic variables. Besides this, we constructed a stably transfected CLDN7 knockdown SACC-LM cell line via RNAi and assessed its biological behavior changes (cell viability, migration, and invasion). The correlation between CLDN7 and epithelial-mesenchymal transition (EMT) was analyzed. Additionally, a subcutaneous tumor formation model was used to assess SACC-LM cells tumorigenicity after the CLDN7 knockdown. In the present study, we found the CLDN7 expression of tumor group was lower than that in normal salivary glands and was significantly correlated with lymph node metastasis, recurrence, and gender. CLDN7 knockdown could add the proliferation and metastasis ability of SACC by regulating EMT through Wnt/β-catenin signaling pathway. In addition, CLDN7 knockdown in SACC promoted tumor growth in nude mice. CLDN7 inhibits cell proliferation and metastasis by inactivating the Wnt/β-catenin signaling in SACC. Thus, CLDN7 expression might be a useful marker to identify the potential for progression in SACC.
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Affiliation(s)
- Huan Ji
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
- Institute of Stomatology, Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
- Both the authors are co-first authors
| | - Xu Ding
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
- Institute of Stomatology, Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
- Both the authors are co-first authors
| | - Wei Zhang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
- Institute of Stomatology, Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Yang Zheng
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
- Institute of Stomatology, Department of Oral Pathology, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Hongming Du
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
- Institute of Stomatology, Department of Oral Pathology, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Yangyu Zheng
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
- Institute of Stomatology, Department of Oral Pathology, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Haiyang Song
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
- Institute of Stomatology, Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Meng Li
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
- Institute of Stomatology, Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Yue Jiang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
- Institute of Stomatology, Department of Oral Pathology, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Jiaxiang Xie
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
- Institute of Stomatology, Department of Oral Pathology, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Ming Wu
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
- Institute of Stomatology, Department of Oral Pathology, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Pengfei Jiao
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
- Institute of Stomatology, Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Zeyu Wang
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
- Institute of Stomatology, Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Heming Wu
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
- Institute of Stomatology, Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Yi Zhong
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
- Institute of Stomatology, Department of Oral Pathology, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
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Zhou Y, Xiang J, Bhandari A, Guan Y, Xia E, Zhou X, Wang Y, Wang O. CLDN10 is Associated with Papillary Thyroid Cancer Progression. J Cancer 2018; 9:4712-4717. [PMID: 30588256 PMCID: PMC6299396 DOI: 10.7150/jca.28636] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 08/31/2018] [Indexed: 12/20/2022] Open
Abstract
The incidence of thyroid cancer is staying at a high level. Claudin family is a skelemin contacting with the intercellular junction and can keep a dynamic balance between cells. Recently, many types of research indicated that the expression level of claudins is closely related to various cancer types and they can be novel diagnostic markers. For instance, Claudin-10(CLDN10) is the high expression in primary hepatocellular carcinoma, papillary thyroid cancer (PTC) and so on. But the biological role and function of CLDN10 in PTC are unclear. In our study, we measured the expression of CLDN10 in human normal tissues and matched PTC tissues by quantitative real-time polymerase chain reaction (qRT-PCR) and this observation was consistent with that in the TCGA cohort. We discovered that high expression of CLDN10 was correlated with lymph node metastasis, age and Histological type in TCGA cohorts. Kaplan-Meier analysis showed that patients with higher CLDN10 expression had a worse overall survival. In vitro, CLDN10 could promote cellular proliferation, migration, and invasion in PTC cell lines. In a word, CLDN10 is a functionally gene facilitating tumorgenesis in PTC and acts as an oncogene in PTC.
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Affiliation(s)
- Yili Zhou
- Department of Thyroid & Breast Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, PR China
| | - Jingjing Xiang
- Department of Thyroid & Breast Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, PR China
| | - Adheesh Bhandari
- Department of Thyroid & Breast Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, PR China
| | - Yaoyao Guan
- Department of Thyroid & Breast Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, PR China
| | - Erjie Xia
- Department of Thyroid & Breast Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, PR China
| | - Xiaofen Zhou
- Department of Thyroid & Breast Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, PR China
| | - Yinghao Wang
- Department of Thyroid & Breast Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, PR China
| | - Ouchen Wang
- Department of Thyroid & Breast Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, PR China
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7
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Hashimoto Y, Yagi K, Kondoh M. Roles of the first-generation claudin binder, Clostridium perfringens enterotoxin, in the diagnosis and claudin-targeted treatment of epithelium-derived cancers. Pflugers Arch 2016; 469:45-53. [PMID: 27629072 DOI: 10.1007/s00424-016-1878-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 08/20/2016] [Accepted: 09/06/2016] [Indexed: 12/11/2022]
Abstract
Given that most malignant tumors are derived from epithelium, developing a strategy for treatment of epithelium-derived cancers (i.e., carcinomas) is a pivotal issue in cancer therapy. Carcinomas, including ovarian, breast, prostate, and pancreatic cancers, are known to overexpress various claudins (CLDNs); in particular, CLDN-3 and -4 are frequently overexpressed in malignant case. The generation of CLDN binders is a key for expanding CLDN-targeted cancer therapy but has been delayed due to the small size of CLDN extracellular domains (approximately 50 amino acids for the first domain and 15 amino acids for the second) and their high homology among species. Interestingly, however, the receptors for Clostridium perfringens enterotoxin (CPE), a foodborne toxin in humans, happen to be identical to CLDN-3 and -4. Thus, the first CLDN binder, CPE, has provided us CLDN-targeted cancer therapy from a concept into a potential reality. In this review, we describe roles of CPE technology in cancer therapy and discuss future directions in the CLDN-targeting concept-to-therapy process.
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Affiliation(s)
- Yosuke Hashimoto
- Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Kiyohito Yagi
- Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Masuo Kondoh
- Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan.
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8
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Karabulut M, Alis H, Bas K, Karabulut S, Afsar CU, Oguz H, Gunaldi M, Akarsu C, Kones O, Aykan NF. Clinical significance of serum claudin-1 and claudin-7 levels in patients with colorectal cancer. Mol Clin Oncol 2015; 3:1255-1267. [PMID: 26807230 PMCID: PMC4665381 DOI: 10.3892/mco.2015.626] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Accepted: 08/18/2015] [Indexed: 12/25/2022] Open
Abstract
The present study aimed to investigate the serum levels and clinical relevance of claudin (CLDN) 1 and CLDN7 in patients with colorectal cancer (CRC). A total of 140 patients with a pathologically confirmed diagnosis of CRC were enrolled in this study. The serum levels of CLDN1 and CLDN7 were determined using the solid-phase sandwich ELISA method. A total of 40 healthy age- and gender-matched controls were included in the analysis. The median age of the patients was 60 years (range, 24-84 years). The localization of the tumor in the majority of the patients was the colon (n=81, 58%). Of the 55 metastatic patients who received palliative chemotheraphy, 31% were chemotherapy-responsive. The baseline median serum CLDN1 and CLDN7 levels were significantly lower in non-metastatic and metastatic patients compared with those in healthy controls (CLND1, P=0.008 and 0.002; and CLND7, P=0.002 and 0.002, respectively). Moreover, known clinical variables, including poor performance status and high carcinoembryonic antigen (CEA) levels were found to be associated with lower serum CLDN1 concentrations for all patients (P=0.03 and P=0.03, respectively). High T stage and high CEA levels were found to be correlated with lower serum CLDN7 concentrations for all patients (P=0.04 and 0.03, respectively). A correlation was identified between CLDN1 and CLDN7 levels in non-metastatic and metastatic CRC patients (both P-values <0.001). Our study results did not reveal any statistical significance for serum CLDN1 or CLND7 concentrations regarding progression-free and overall survival rate. Therefore, reduced serum levels of CLDN1 and CLND7 may be useful markers in the differential diagnosis of CRC.
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Affiliation(s)
- Mehmet Karabulut
- Clinic of General Surgery, Istanbul Bakırköy Dr Sadi Konuk Education and Research Hospital, 34156 Istanbul, Turkey
| | - Halil Alis
- Clinic of General Surgery, Istanbul Bakırköy Dr Sadi Konuk Education and Research Hospital, 34156 Istanbul, Turkey
| | - Koray Bas
- Clinic of General Surgery, Istanbul Bakırköy Dr Sadi Konuk Education and Research Hospital, 34156 Istanbul, Turkey
| | - Senem Karabulut
- Department of Medical Oncology, Institute of Oncology, Istanbul University, 34093 Istanbul, Turkey
| | - Cigdem Usul Afsar
- Department of Medical Oncology, Istanbul Education and Research Hospital, 34098 Istanbul, Turkey
| | - Hilal Oguz
- Department of Basic Oncology, Institute of Oncology, Istanbul University, 34390 Istanbul, Turkey
| | - Meral Gunaldi
- Clinic of Medical Oncology, Istanbul Bakirköy Dr Sadi Konuk Education and Research Hospital, 34156 Istanbul, Turkey
| | - Cevher Akarsu
- Clinic of General Surgery, Istanbul Bakırköy Dr Sadi Konuk Education and Research Hospital, 34156 Istanbul, Turkey
| | - Osman Kones
- Clinic of General Surgery, Istanbul Bakırköy Dr Sadi Konuk Education and Research Hospital, 34156 Istanbul, Turkey
| | - Nuri Faruk Aykan
- Department of Medical Oncology, Institute of Oncology, Istanbul University, 34093 Istanbul, Turkey
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Lu Z, Kim DH, Fan J, Lu Q, Verbanac K, Ding L, Renegar R, Chen YH. A non-tight junction function of claudin-7-Interaction with integrin signaling in suppressing lung cancer cell proliferation and detachment. Mol Cancer 2015; 14:120. [PMID: 26081244 PMCID: PMC4470020 DOI: 10.1186/s12943-015-0387-0] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2014] [Accepted: 05/18/2015] [Indexed: 02/08/2023] Open
Abstract
Background Claudins are a family of tight junction (TJ) membrane proteins involved in a broad spectrum of human diseases including cancer. Claudin-7 is a unique TJ membrane protein in that it has a strong basolateral membrane distribution in epithelial cells and in tissues. Therefore, this study aims to investigate the functional significance of this non-TJ localization of claudin-7 in human lung cancer cells. Methods Claudin-7 expression was suppressed or deleted by lentivirus shRNA or by targeted-gene deletion. Cell cycle analysis and antibody blocking methods were employed to assay cell proliferation and cell attachment, respectively. Electron microscopy and transepthelial electrical resistance measurement were performed to examine the TJ ultrastructure and barrier function. Co-immunolocalization and co-immunoprecipitation was used to study claudin-7 interaction with integrin β1. Tumor growth in vivo were analyzed using athymic nude mice. Results Claudin-7 co-localizes and forms a stable complex with integrin β1. Both suppressing claudin-7 expression by lentivirus shRNA in human lung cancer cells (KD cells) and deletion of claudin-7 in mouse lungs lead to the reduction in integrin β1 and phospho-FAK levels. Suppressing claudin-7 expression increases cell growth and cell cycle progression. More significantly, claudin-7 KD cells have severe defects in cell-matrix interactions and adhere poorly to culture plates with a remarkably reduced integrin β1 expression. When cultured on uncoated glass coverslips, claudin-7 KD cells grow on top of each other and form spheroids while the control cells adhere well and grow as a monolayer. Reintroducing claudin-7 reduces cell proliferation, upregulates integrin β1 expression and increases cell-matrix adhesion. Integrin β1 transfection partially rescues the cell attachment defect. When inoculated into nude mice, claudin-7 KD cells produced significantly larger tumors than control cells. Conclusion In this study, we identified a previously unrecognized function of claudin-7 in regulating cell proliferation and maintaining epithelial cell attachment through engaging integrin β1. Electronic supplementary material The online version of this article (doi:10.1186/s12943-015-0387-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Zhe Lu
- School of Medicine, Hangzhou Normal University, Hangzhou, 310036, China. .,Department of Anatomy and Cell Biology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA.
| | - Do Hyung Kim
- Department of Anatomy and Cell Biology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA.
| | - Junming Fan
- Department of Anatomy and Cell Biology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA.
| | - Qun Lu
- Department of Anatomy and Cell Biology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA. .,Leo Jenkins Cancer Center, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA.
| | - Kathryn Verbanac
- Leo Jenkins Cancer Center, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA. .,Department of Surgery, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA.
| | - Lei Ding
- Department of Anatomy and Cell Biology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA.
| | - Randall Renegar
- Department of Anatomy and Cell Biology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA.
| | - Yan-Hua Chen
- Department of Anatomy and Cell Biology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA. .,Leo Jenkins Cancer Center, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA.
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10
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Liu Z, Lu Y, He Z, Chen L, Lu Y. Expression analysis of the estrogen receptor target genes in renal cell carcinoma. Mol Med Rep 2014; 11:75-82. [PMID: 25351113 PMCID: PMC4237094 DOI: 10.3892/mmr.2014.2766] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Accepted: 07/04/2014] [Indexed: 02/05/2023] Open
Abstract
The aim of the present study was to investigate the differentially expressed genes (DEGs) and target genes of the estrogen receptor (ER) in renal cell carcinoma. The data (GSE12090) were downloaded from the gene expression omnibus database. Data underwent preprocessing using the affy package for Bioconductor software, then the DEGs were selected via the significance analysis of microarray algorithm within the siggenes package. Subsequently, the DEGs underwent functional and pathway enrichment analysis using Database for Annotation Visualization and Integrated Discovery software. Following data analysis, transcriptional regulatory networks between the DEGs and transcription factors were constructed. Finally, the ER target genes were subjected to gene ontology enrichment analysis. A total of 215 DEGs were identified between the chromophobe renal cell carcinoma samples and the oncocytoma samples, including 126 upregulated and 89 downregulated genes. Functional enrichment analysis indicated that 25% of the DEGs were significantly enriched in functions associated with the plasma membrane. Among those DEGs, 105 were regulated by the ER. Further regulatory network analysis indicated that the ER was mainly involved in the regulation of oncogenes and tumor suppressor genes, including protease serine 8, claudin 7 and Ras-related protein Rab-25. In the present study, the identified ER target genes were demonstrated to be closely associated with tumor development; this knowledge may improve the understanding of the ER regulatory mechanisms during tumor development and promote the discovery of predictive markers for renal cell carcinoma.
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Affiliation(s)
- Zhihong Liu
- Department of Urology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - You Lu
- Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Zonghai He
- Department of Urology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Libo Chen
- Department of Urology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Yiping Lu
- Department of Urology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
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Wong YL, Dali AZHM, Mohamed Rose I, Jamal R, Mokhtar NM. Potential molecular signatures in epithelial ovarian cancer by genome wide expression profiling. Asia Pac J Clin Oncol 2014; 12:e259-68. [PMID: 24673814 DOI: 10.1111/ajco.12182] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/17/2014] [Indexed: 11/29/2022]
Abstract
AIMS Ovarian cancer is the deadliest of all gynecologic cancers because of its late diagnosis and poor treatment outcomes. This study aimed to identify potential molecular signatures associated with biological processes that are implicated in epithelial ovarian cancer (EOC). METHODS Expression profiling was carried out on 16 fresh frozen EOC and normal ovarian tissue samples using the Illumina Whole Genome DASL assay (cDNA-mediated annealing, selection, extension and ligation). The differentially expressed genes were analyzed using the GeneSpring GX11.5 and Pathway Studio 8.0 software. The microarray results were validated using the immunohistochemistry analyses. RESULTS Unpaired t-test identified 652 (270 up- and 382 downregulated) significant differentially expressed genes (P < 0.001 and fold change ≥2.0). Hierarchical clustering analysis displayed a distinct separation of cancer and normal samples. Gene set enrichment analysis identified alterations in the expression of genes associated with cancer development and progression. Positive immunostaining of claudin-7, ephrin receptor A1 and Forkhead Box M1 in EOC was consistent with the upregulation of these genes in the microarray result. However, the positive immunostaining of fibroblast growth factor-7 in cancer tissues was not in accordance with the downregulation of this gene in the microarray result. CONCLUSION These results identify significant genes and their related biological processes which may contribute to the better understanding of development and progression of epithelial ovarian cancer.
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Affiliation(s)
- Yin-Ling Wong
- Department of Physiology, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | | | - Isa Mohamed Rose
- Department of Pathology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Rahman Jamal
- UKM Medical Molecular Biology Institute, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Norfilza Mohd Mokhtar
- Department of Physiology, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia.,UKM Medical Molecular Biology Institute, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
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Kwon MJ. Emerging roles of claudins in human cancer. Int J Mol Sci 2013; 14:18148-80. [PMID: 24009024 PMCID: PMC3794774 DOI: 10.3390/ijms140918148] [Citation(s) in RCA: 155] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 08/23/2013] [Accepted: 08/27/2013] [Indexed: 02/07/2023] Open
Abstract
Claudins are major integral membrane proteins of tight junctions. Altered expression of several claudin proteins, in particular claudin-1, -3, -4 and -7, has been linked to the development of various cancers. Although their dysregulation in cancer suggests that claudins play a role in tumorigenesis, the exact underlying mechanism remains unclear. The involvement of claudins in tumor progression was suggested by their important role in the migration, invasion and metastasis of cancer cells in a tissue-dependent manner. Recent studies have shown that they play a role in epithelial to mesenchymal transition (EMT), the formation of cancer stem cells or tumor-initiating cells (CSCs/TICs), and chemoresistance, suggesting that claudins are promising targets for the treatment of chemoresistant and recurrent tumors. A recently identified claudin-low breast cancer subtype that is characterized by the enrichment of EMT and stem cell-like features is significantly associated with disease recurrence, underscoring the importance of claudins as predictors of tumor recurrence. The critical role of epigenetic mechanisms in the regulation of claudin expression indicates the possible application of epigenetic therapy to target claudins. A better understanding of the emerging role of claudins in CSC/TICs and chemoresistance may help to develop therapies against recurrent cancers.
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Affiliation(s)
- Mi Jeong Kwon
- College of Pharmacy, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 702-701, Korea.
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13
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Regulation of the Epithelial-Mesenchymal Transition by Claudin-3 and Claudin-4. PLoS One 2013; 8:e67496. [PMID: 23805314 PMCID: PMC3689737 DOI: 10.1371/journal.pone.0067496] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Accepted: 05/20/2013] [Indexed: 01/06/2023] Open
Abstract
The mechanisms that control intracellular adhesion are central to the process of invasion and metastasis. Claudin-3 (CLDN3) and claudin-4 (CLDN4) are major structural molecules of the tight junctions that link epithelial cells. Our prior work has demonstrated that knockdown of the expression of either CLDN3 or CLDN4 produces marked changes in the phenotype of ovarian carcinoma cells including increases in growth rate in vivo, migration, invasion, metastasis, and drug resistance, similar to those produced by the epithelial-to-mesenchymal transition (EMT). We postulated that these changes may result from the ability of CLDN3 or CLDN4 to suppress EMT. In this study we found that knockdown of either CLDN3 or CLDN4 increased cell size and resulted in flattened morphology. While knockdown of CLDN3 or CLDN4 did not alter the expression of vimentin, it significantly down-regulated the level of E-cadherin and up-regulated N-cadherin expression. Conversely, over-expression of CLDN3 or CLDN4 in a cell line that does not express endogenous CLDN3 or CLDN4 decreased N-cadherin expression. Re-expression of E-cadherin in the CLDN3 or CLDN4 knockdown cells reduced migration, invasion and tumor growth in vivo. Loss of either CLDN3 or CLDN4 resulted in activation of the PI3K pathway as evidenced by increased Akt phosphorylation, elevated cellular PIP3 content and PI3K activity as well as up-regulation of the mRNA and protein levels of the transcription factor Twist. Taken together, these findings suggest that CLDN3 and CLDN4 function to sustain an epithelial phenotype and that their loss promotes EMT.
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English DP, Santin AD. Claudins overexpression in ovarian cancer: potential targets for Clostridium Perfringens Enterotoxin (CPE) based diagnosis and therapy. Int J Mol Sci 2013; 14:10412-37. [PMID: 23685873 PMCID: PMC3676847 DOI: 10.3390/ijms140510412] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Revised: 04/26/2013] [Accepted: 04/27/2013] [Indexed: 02/06/2023] Open
Abstract
Claudins are a family of tight junction proteins regulating paracellular permeability and cell polarity with different patterns of expression in benign and malignant human tissues. There are approximately 27 members of the claudin family identified to date with varying cell and tissue-specific expression. Claudins-3, -4 and -7 represent the most highly differentially expressed claudins in ovarian cancer. While their exact role in ovarian tumors is still being elucidated, these proteins are thought to be critical for ovarian cancer cell invasion/dissemination and resistance to chemotherapy. Claudin-3 and claudin-4 are the natural receptors for the Clostridium perfringens enterotoxin (CPE), a potent cytolytic toxin. These surface proteins may therefore represent attractive targets for the detection and treatment of chemotherapy-resistant ovarian cancer and other aggressive solid tumors overexpressing claudin-3 and -4 using CPE-based theranostic agents.
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Affiliation(s)
- Diana P. English
- Department of Obstetrics, Gynecology and Reproductive Sciences, Yale University School of Medicine, New Haven, CT 06520, USA; E-Mail:
| | - Alessandro D. Santin
- Department of Obstetrics, Gynecology and Reproductive Sciences, Yale University School of Medicine, New Haven, CT 06520, USA; E-Mail:
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15
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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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Li J, Tu Y, Jiang L, Xu H, Zhang S. [Expression and significance of Snail and Claudin-3 in non-small cell lung cancer]. ZHONGGUO FEI AI ZA ZHI = CHINESE JOURNAL OF LUNG CANCER 2012; 15:583-90. [PMID: 23075682 PMCID: PMC5999829 DOI: 10.3779/j.issn.1009-3419.2012.10.04] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
背景与目的 上皮-间质转化(epithelial mesenchymal transition, EMT)是肿瘤浸润和转移的关键步骤,上皮细胞极性丧失是其主要标志,表现为Claudin等上皮标记丢失。锌指转录因子Snail是调控EMT的重要转录因子,近年来对肿瘤侵袭转移机制研究发现Snail能提高多种肿瘤的侵袭能力。本研究旨在利用组织芯片技术探讨转录因子Snail和紧密连接蛋白(Claudin-3)在非小细胞肺癌(non-small cell lung cancer, NSCLC)及其淋巴结转移灶中的表达和意义。 方法 分别采用免疫组织化学MaxVision法和EnVision法检测59例癌旁正常肺组织、302例NSCLC原发灶以及57例淋巴结转移灶中Snail和Claudin-3的表达。 结果 Snail在癌旁正常肺组织、NSCLC原发灶以及淋巴结转移灶中的表达逐渐增强,差异具有统计学意义(P < 0.05);Claudin-3在癌旁正常肺组织、NSCLC原发灶以及淋巴结转移灶中的表达逐渐减弱,差异具有统计学意义(P < 0.05)。在NSCLC原发灶中,Snail和Claudin-3的表达与肿瘤组织学类型有关(P < 0.05)。Spearman等级相关分析显示Snail与Claudin-3的表达呈负相关(r=-0.178, P=0.002)。Kaplan-Meier生存分析显示肿瘤大小、组织学类型、病理分级、有无癌转移、TNM分期、Snail的表达以及Snail与Claudin-3的差异性表达影响NSCLC患者的术后生存时间(P < 0.05)。Cox回归分析提示肿瘤大小、组织学类型、病理分级、有无癌转移和TNM分期是影响NSCLC患者预后的独立危险因素(P < 0.05)。 结论 Snail和Claudin-3在NSCLC的浸润、转移中具有重要意义,有助于对NSCLC患者预后的评价。
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Affiliation(s)
- Juan Li
- Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
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Abstract
Epithelial ovarian cancer (EOC) remains the most lethal gynecological malignancy despite several decades of progress in diagnosis and treatment. Taking advantage of the robust development of discovery and utility of prognostic biomarkers, clinicians and researchers are developing personalized and targeted treatment strategies. This review encompasses recently discovered biomarkers of ovarian cancer, the utility of published prognostic biomarkers for EOC (especially biomarkers related to angiogenesis and key signaling pathways), and their integration into clinical practice.
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Affiliation(s)
- Jie Huang
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
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Davidson B, Tropé CG, Reich R. Epithelial-mesenchymal transition in ovarian carcinoma. Front Oncol 2012; 2:33. [PMID: 22655269 PMCID: PMC3356037 DOI: 10.3389/fonc.2012.00033] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2012] [Accepted: 03/21/2012] [Indexed: 12/22/2022] Open
Abstract
Ovarian cancer is the most lethal gynecologic malignancy, with the majority of patients dying within 5 years of diagnosis. This poor survival of patients diagnosed with this malignancy is attributed to diagnosis at advanced stage, when the tumor has metastasized, and to chemotherapy resistance, either primary or developing along tumor progression. However, ovarian carcinomas, constituting the vast majority of ovarian cancers, additionally have unique biology, one aspect of which is the ability to co-express epithelial and mesenchymal determinants. epithelial–mesenchymal transition (EMT), a physiological process by which mesenchymal cells are formed and migrate to target organs during embryogenesis, is involved in cancer cell invasion and metastasis. However, these changes do not fully occur in ovarian carcinoma, and are even reversed in tumor cells present in malignant peritoneal and pleural effusions. This review summarizes current knowledge in this area, including the characteristics of EMT related to adhesion, transcriptional regulation and chemoresistance, and their clinical relevance, as well as the recently observed regulation of EMT by microRNA.
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Affiliation(s)
- Ben Davidson
- Division of Pathology, Norwegian Radium Hospital, Oslo University Hospital Oslo, Norway
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Turksen K, Troy TC. Junctions gone bad: Claudins and loss of the barrier in cancer. Biochim Biophys Acta Rev Cancer 2011; 1816:73-9. [DOI: 10.1016/j.bbcan.2011.04.001] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2011] [Revised: 04/05/2011] [Accepted: 04/08/2011] [Indexed: 12/13/2022]
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Claudin-7 is frequently overexpressed in ovarian cancer and promotes invasion. PLoS One 2011; 6:e22119. [PMID: 21789222 PMCID: PMC3137611 DOI: 10.1371/journal.pone.0022119] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2010] [Accepted: 06/16/2011] [Indexed: 12/14/2022] Open
Abstract
Background Claudins are tight junction proteins that are involved in tight junction formation and function. Previous studies have shown that claudin-7 is frequently upregulated in epithelial ovarian cancer (EOC) along with claudin-3 and claudin-4. Here, we investigate in detail the expression patterns of claudin-7, as well as its possible functions in EOC. Methodology/Principal Findings A total of 95 ovarian tissue samples (7 normal ovarian tissues, 65 serous carcinomas, 11 clear cell carcinomas, 8 endometrioid carcinomas and 4 mucinous carcinomas) were studied for claudin-7 expression. In real-time RT-PCR analysis, the gene for claudin-7, CLDN7, was found to be upregulated in all the tumor tissue samples studied. Similarly, immunohistochemical analysis and western blotting showed that claudin-7 protein was significantly overexpressed in the vast majority of EOCs. Small interfering RNA-mediated knockdown of claudin-7 in ovarian cancer cells led to significant changes in gene expression as measured by microarrays and validated by RT-PCR and immunoblotting. Analyses of the genes differentially expressed revealed that the genes altered in response to claudin-7 knockdown were associated with pathways implicated in various molecular and cellular functions such as cell cycle, cellular growth and proliferation, cell death, development, and cell movement. Through functional experiments in vitro, we found that both migration and invasion were altered in cells where CLDN7 had been knocked down or overexpressed. Interestingly, claudin-7 expression was associated with a net increase in invasion, but also with a decrease in migration. Conclusion/Significance Our work shows that claudin-7 is significantly upregulated in EOC and that it may be functionally involved in ovarian carcinoma invasion. CLDN7 may therefore represent potential marker for ovarian cancer detection and a target for therapy.
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Li R, Zhang D, Cai C, Dong J. [The clinical significance of Claudin-7 and slug expression in lung squamous cell carcinoma and adenocarcinoma]. ZHONGGUO FEI AI ZA ZHI = CHINESE JOURNAL OF LUNG CANCER 2011; 14:492-6. [PMID: 21645451 PMCID: PMC5999881 DOI: 10.3779/j.issn.1009-3419.2011.06.03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
背景与目的 Claudins是紧密连接的骨架蛋白,Claudin-7是Claudins家族成员之一。本研究旨在观察Claudin-7和Slug在肺鳞癌和腺癌中的表达及其与临床病理因素的关系,并探讨Claudin-7和Slug的相互关系。 方法 采用免疫组织化学SP法检测101例原发性肺鳞癌、腺癌组织中Claudin-7和Slug的表达,同时应用Western blot检测30例新鲜肺癌组织及其配对的癌旁组织中Claudin-7和Slug的表达情况。 结果 Claudin-7在肺癌中的表达明显低于正常肺组织,并且与分化程度和淋巴结转移有关(P < 0.05),Slug在肺癌中的表达明显高于正常肺组织,除与分化程度和淋巴结转移有关外,还与TNM分期有关(P < 0.05),肺鳞癌、腺癌中Claudin-7与Slug的表达具有负相关性(r=-0.566, 8)。 结论 肺鳞癌、腺癌中Claudin-7的低表达与Slug的高表达可能是肺组织恶性转变和转移的有关标志物之一。
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Affiliation(s)
- Rui Li
- Department of Pathology, China Medical University, and Liaoning Cancer Hospital, Shenyang 110001, China
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Baumgartner HK, Beeman N, Hodges RS, Neville MC. A D-peptide analog of the second extracellular loop of claudin-3 and -4 leads to mislocalized claudin and cellular apoptosis in mammary epithelial cells. Chem Biol Drug Des 2011; 77:124-36. [PMID: 21266016 DOI: 10.1111/j.1747-0285.2010.01061.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Claudins are cell adhesion proteins thought to mediate cell-cell contacts at the tight junction. Although a major role of claudins is to control paracellular diffusion, increasing evidence suggests that they may also function in tumor progression. To examine the role of the second extracellular loop in cell adhesion, a small peptide was designed, which mimics a conserved sequence, DFYNP, within specific 'classic' claudin subtypes. Using fluorescent indicators with mammary epithelial cells, treatment with both the L- and D-forms of this peptide showed mislocalization of claudin-4 and claudin-3 and activation of caspase-8 and caspase-3, indicating apoptosis. To test specificity, peptides were made both with various end-groups and with glycine substitutions at each of the five residues. Changing end-groups did not influence the activity of the peptide. Amino acid substitutions at F147, Y148, N149, or P150, however, prevented peptide activity. A fluorescent-labeled peptide was shown to associate with the tight junction at 4 °C and cause apoptosis when the cultures were warmed to 37 °C. In conclusion, both the D- and L-forms of a small peptide that mimics a sequence in the second extracellular loop of claudins can target and disrupt claudin proteins in an epithelial monolayer and initiate apoptosis.
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Affiliation(s)
- Heidi K Baumgartner
- Department of Physiology and Biophysics, University of Colorado Denver, School of Medicine, 12800 E. 19th Ave, Aurora, CO 80045, USA.
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Bornholdt J, Friis S, Godiksen S, Poulsen SS, Santoni-Rugiu E, Bisgaard HC, Lothe IMB, Ikdahl T, Tveit KM, Johnson E, Kure EH, Vogel LK. The level of claudin-7 is reduced as an early event in colorectal carcinogenesis. BMC Cancer 2011; 11:65. [PMID: 21310043 PMCID: PMC3045986 DOI: 10.1186/1471-2407-11-65] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2010] [Accepted: 02/10/2011] [Indexed: 12/11/2022] Open
Abstract
Background Compromised epithelial barriers are found in dysplastic tissue of the gastrointestinal tract. Claudins are transmembrane proteins important for tight junctions. Claudins regulate the paracellular transport and are crucial for maintaining a functional epithelial barrier. Down-regulation of the oncogenic serine protease, matriptase, induces leakiness in epithelial barriers both in vivo and in vitro. We found in an in-silico search tight co-regulation between matriptase and claudin-7 expression. We have previously shown that the matriptase expression level decreases during colorectal carcinogenesis. In the present study we investigated whether claudin-7 expression is likewise decreased during colorectal carcinogenesis, thereby causing or contributing to the compromised epithelial leakiness of dysplastic tissue. Methods The mRNA level of claudin-7 (CLDN7) was determined in samples from 18 healthy individuals, 100 individuals with dysplasia and 121 colorectal cancer patients using quantitative real time RT-PCR. In addition, immunohistochemical stainings were performed on colorectal adenomas and carcinomas, to confirm the mRNA findings. Results A 2.7-fold reduction in the claudin-7 mRNA level was found when comparing the biopsies from healthy individuals with the biopsies of carcinomas (p < 0.001). Reductions in the claudin-7 mRNA levels were also detected in mild/moderate dysplasia (p < 0.001), severe dysplasia (p < 0.01) and carcinomas (p < 0.01), compared to a control sample from the same individual. The decrease at mRNA level was confirmed at the protein level by immunohistochemical stainings. Conclusions Our results show that the claudin-7 mRNA level is decreased already as an early event in colorectal carcinogenesis, probably contributing to the compromised epithelial barrier in adenomas.
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Affiliation(s)
- Jette Bornholdt
- Department of Cellular and Molecular Medicine, Faculty of Health Science, University of Copenhagen, Denmark
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Kim CJ, Lee JW, Choi JJ, Choi HY, Park YA, Jeon HK, Sung CO, Song SY, Lee YY, Choi CH, Kim TJ, Lee JH, Kim BG, Bae DS. High claudin-7 expression is associated with a poor response to platinum-based chemotherapy in epithelial ovarian carcinoma. Eur J Cancer 2010; 47:918-25. [PMID: 21134740 DOI: 10.1016/j.ejca.2010.11.007] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2010] [Revised: 10/27/2010] [Accepted: 11/05/2010] [Indexed: 12/18/2022]
Abstract
BACKGROUND Claudin-7 (CLDN-7) is a tight junction protein that has been shown overexpressed in several human cancers. We investigated prognostic significance of CLDN-7 overexpression in patients with epithelial ovarian carcinoma (EOC) and its functional role on cell proliferation in ovarian carcinoma cell lines. PATIENTS AND METHODS CLDN-7 expression was evaluated by real-time RT-PCR and immunohistochemical analysis in 71 patients with EOC. We assessed the association of CLDN-7 expressions with prognosis of the patients including sensitivity to platinum-based chemotherapy. In vitro experiment was performed with and without inhibition of CLDN-7 by its siRNA to evaluate the sensitivity of the human ovarian cancer cells to cisplatin chemotherapy. RESULTS CLDN-7 transcripts in EOCs were significantly up-regulated compared with normal ovarian tissues (P<0.001). The expression of CLDN-7 protein was observed in majority (69/71, 97.1%) of the EOCs but not in normal ovarian tissues (P<0.001). High CLDN-7 expression in primary tumour correlated with shorter progression-free survival (PFS) of the patients (P=0.005) and poor sensitivity to platinum-based chemotherapy (P=0.024). Moreover, CLDN-7 was highly expressed in 2774 and HeyA8 human ovarian cancer cells and inhibition of CLDN-7 by its siRNA significantly enhanced the sensitivity of 2774 and HeyA8 cells to cisplatin treatment. CONCLUSION These findings suggest CLDN-7 expression is an independent prognostic factor for PFS and it may play a role in regulating response to platinum-based chemotherapy in the treatment of EOC.
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Affiliation(s)
- Chul Jung Kim
- Department of Obstetrics and Gynecology, College of Medicine, Konyang University, Daejeon 302-718, Republic of Korea
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Yamamoto T, Oshima T, Yoshihara K, Yamanaka S, Nishii T, Arai H, Inui K, Kaneko T, Nozawa A, Woo T, Rino Y, Masuda M, Imada T. Reduced expression of claudin-7 is associated with poor outcome in non-small cell lung cancer. Oncol Lett 2010; 1:501-505. [PMID: 22966332 DOI: 10.3892/ol_00000088] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2009] [Accepted: 03/02/2010] [Indexed: 12/18/2022] Open
Abstract
Claudin-7 is a tight junction protein that plays an important role in tumorigenesis, tumor invasion and metastasis. We examined the clinical significance of claudin-7 expression in 75 postsurgical non-small cell lung cancer (NSCLC) patients. Claudin-7 expression was measured immunohistochemically and was found to be high in 25 patients (33.3%) and low in 50 (66.7%). Survival was significantly poorer in patients with claudin-7-low than in those with claudin-7-high NSCLCs (P=0.024). In particular, survival was significantly poorer in patients with claudin-7-low than in those with claudin-7-high squamous cell carcinomas (P=0.011). A reduced expression of claudin-7 was associated with poor outcome in NSCLCs. Claudin-7 may thus be a useful biomarker and a potential therapeutic target in patients with NSCLC.
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