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Chan ET, Kural C. Targeting endocytosis to sensitize cancer cells to programmed cell death. Biochem Soc Trans 2024:BST20231332. [PMID: 39092762 DOI: 10.1042/bst20231332] [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: 04/24/2024] [Revised: 07/01/2024] [Accepted: 07/18/2024] [Indexed: 08/04/2024]
Abstract
Evading programmed cell death (PCD) is a hallmark of cancer that allows tumor cells to survive and proliferate unchecked. Endocytosis, the process by which cells internalize extracellular materials, has emerged as a key regulator of cell death pathways in cancer. Many tumor types exhibit dysregulated endocytic dynamics that fuel their metabolic demands, promote resistance to cytotoxic therapies, and facilitate immune evasion. This review examines the roles of endocytosis in apoptotic resistance and immune escape mechanisms utilized by cancer cells. We highlight how inhibiting endocytosis can sensitize malignant cells to therapeutic agents and restore susceptibility to PCD. Strategies to modulate endocytosis for enhanced cancer treatment are discussed, including targeting endocytic regulatory proteins, altering membrane biophysical properties, and inhibiting Rho-associated kinases. While promising, challenges remain regarding the specificity and selectivity of endocytosis-targeting agents. Nonetheless, harnessing endocytic pathways represents an attractive approach to overcome apoptotic resistance and could yield more effective therapies by rendering cancer cells vulnerable to PCD. Understanding the interplay between endocytosis and PCD regulation is crucial for developing novel anticancer strategies that selectively induce tumor cell death.
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Affiliation(s)
- Emily T Chan
- Interdisciplinary Biophysics Graduate Program, The Ohio State University, Columbus, OH 43210, U.S.A
| | - Cömert Kural
- Interdisciplinary Biophysics Graduate Program, The Ohio State University, Columbus, OH 43210, U.S.A
- Department of Physics, The Ohio State University, Columbus, OH 43210, U.S.A
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2
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Antwi FD, Awad T, Larin M, Heesom K, Lewis P, Reddell P, Poghosyan Z, Dewitt S, Moseley R, Knäuper V. Tigilanol Tiglate-Induced Changes in Secretome Profiles Alter C-Met Phosphorylation and Cell Surface Protein Expression in H357 Head and Neck Cancer Cells. Cells 2024; 13:982. [PMID: 38891113 PMCID: PMC11171882 DOI: 10.3390/cells13110982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Revised: 05/31/2024] [Accepted: 06/01/2024] [Indexed: 06/21/2024] Open
Abstract
Tigilanol tiglate (TT, also known as EBC-46) is a novel, plant-derived diterpene ester possessing anticancer and wound-healing properties. Here, we show that TT-evoked PKC-dependent S985 phosphorylation of the tyrosine kinase MET leads to subsequent degradation of tyrosine phosphorylated p-Y1003 and p-Y1234/5 MET species. PKC inhibition with BIM-1 blocked S985 phosphorylation of MET and led to MET cell surface accumulation. Treatment with metalloproteinase inhibitors prevented MET-ECD release into cell culture media, which was also blocked by PKC inhibitors. Furthermore, unbiased secretome analysis, performed using TMT-technology, identified additional targets of TT-dependent release of cell surface proteins from H357 head and neck cancer cells. We confirm that the MET co-signalling receptor syndecan-1 was cleaved from the cell surface in response to TT treatment. This was accompanied by rapid cleavage of the cellular junction adhesion protein Nectin-1 and the nerve growth factor receptor NGFRp75/TNFR16. These findings, that TT is a novel negative regulator of protumorigenic c-MET and NGFRp75/TNFR16 signalling, as well as regulating Nectin-1-mediated cell adhesion, further contribute to our understanding of the mode of action and efficacy of TT in the treatment of solid tumours.
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Affiliation(s)
- Frank Dickson Antwi
- School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Cardiff CF14 4XY, UK (S.D.); (R.M.)
| | - Tufaha Awad
- School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Cardiff CF14 4XY, UK (S.D.); (R.M.)
| | - Meghan Larin
- School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Cardiff CF14 4XY, UK (S.D.); (R.M.)
| | - Kate Heesom
- Bristol Proteomics Facility, Biomedical Sciences Building, University Walk, University of Bristol, Bristol BS8 1TD, UK
| | - Phil Lewis
- Bristol Proteomics Facility, Biomedical Sciences Building, University Walk, University of Bristol, Bristol BS8 1TD, UK
| | | | - Zaruhi Poghosyan
- School of Medicine, College of Biomedical and Life Sciences, Cardiff University, Cardiff CF14 4XN, UK
| | - Sharon Dewitt
- School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Cardiff CF14 4XY, UK (S.D.); (R.M.)
| | - Ryan Moseley
- School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Cardiff CF14 4XY, UK (S.D.); (R.M.)
| | - Vera Knäuper
- School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Cardiff CF14 4XY, UK (S.D.); (R.M.)
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3
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Iwamoto S, Mori Y, Yamashita T, Ojima K, Akita K, Togano S, Kushiyama S, Yashiro M, Yatera Y, Yamaguchi T, Komiyama A, Sago Y, Itano N, Nakada H. Trophoblast cell surface antigen-2 phosphorylation triggered by binding of galectin-3 drives metastasis through down-regulation of E-cadherin. J Biol Chem 2023; 299:104971. [PMID: 37380081 PMCID: PMC10392139 DOI: 10.1016/j.jbc.2023.104971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 05/24/2023] [Accepted: 05/26/2023] [Indexed: 06/30/2023] Open
Abstract
The expression of trophoblast cell surface antigen-2 (Trop-2) is enhanced in many tumor tissues and is correlated with increased malignancy and poor survival of patients with cancer. Previously, we demonstrated that the Ser-322 residue of Trop-2 is phosphorylated by protein kinase Cα (PKCα) and PKCδ. Here, we demonstrate that phosphomimetic Trop-2 expressing cells have markedly decreased E-cadherin mRNA and protein levels. Consistently, mRNA and protein of the E-cadherin-repressing transcription factors zinc finger E-Box binding homeobox 1 (ZEB1) were elevated, suggesting transcriptional regulation of E-cadherin expression. The binding of galectin-3 to Trop-2 enhanced the phosphorylation and subsequent cleavage of Trop-2, followed by intracellular signaling by the resultant C-terminal fragment. Binding of β-catenin/transcription factor 4 (TCF4) along with the C-terminal fragment of Trop-2 to the ZEB1 promoter upregulated ZEB1 expression. Of note, siRNA-mediated knockdown of β-catenin and TCF4 increased the expression of E-cadherin through ZEB1 downregulation. Knockdown of Trop-2 in MCF-7 cells and DU145 cells resulted in downregulation of ZEB1 and subsequent upregulation of E-cadherin. Furthermore, wild-type and phosphomimetic Trop-2 but not phosphorylation-blocked Trop-2 were detected in the liver and/or lung of some nude mice bearing primary tumors inoculated intraperitoneally or subcutaneously with wild-type or mutated Trop-2 expressing cells, suggesting that Trop-2 phosphorylation, plays an important role in tumor cell mobility in vivo, too. Together with our previous finding of Trop-2 dependent regulation of claudin-7, we suggest that the Trop-2-mediated cascade involves concurrent derangement of both tight and adherence junctions, which may drive metastasis of epithelial tumor cells.
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Affiliation(s)
- Shungo Iwamoto
- Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kyoto, Japan
| | - Yugo Mori
- Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kyoto, Japan
| | - Tomoko Yamashita
- Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kyoto, Japan
| | - Kazuki Ojima
- Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kyoto, Japan
| | - Kaoru Akita
- Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kyoto, Japan
| | - Shingo Togano
- Department of Molecular Oncology and Therapeutics, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Shuhei Kushiyama
- Department of Molecular Oncology and Therapeutics, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Masakazu Yashiro
- Department of Molecular Oncology and Therapeutics, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Yuki Yatera
- Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kyoto, Japan
| | - Tomoko Yamaguchi
- Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kyoto, Japan
| | - Akane Komiyama
- Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kyoto, Japan
| | - Yuki Sago
- Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kyoto, Japan
| | - Naoki Itano
- Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kyoto, Japan
| | - Hiroshi Nakada
- Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kyoto, Japan.
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4
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Zhang F, Zheng Z, Wang L, Zeng W, Wei W, Zhang C, Zhao Z, Liang W. PKC-ζ mediated reduction of the extracellular vesicles-associated TGF-β1 overcomes radiotherapy resistance in breast cancer. Breast Cancer Res 2023; 25:38. [PMID: 37029374 PMCID: PMC10082517 DOI: 10.1186/s13058-023-01641-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 03/20/2023] [Indexed: 04/09/2023] Open
Abstract
BACKGROUND Radiotherapy is widely applied in breast cancer treatment, while radiotherapy resistance is inevitable. TGF-β1 has been considered to be an endogenous factor for the development of radiotherapy resistance. As a large portion of TGF-β1 is secreted in an extracellular vesicles-associated form (TGF-β1EV), particularly in radiated tumors. Thus, the understanding of the regulation mechanisms and the immunosuppressive functions of TGF-β1EV will pave a way for overcoming the radiotherapy resistance in cancer treatment. METHODS The superoxide-Zinc-PKC-ζ-TGF-β1EV pathway in breast cancer cells was identified through sequence alignments of different PKC isoforms, speculation and experimental confirmation. A series of functional and molecular studies were performed by quantitative real-time PCR, western blot and flow cytometry analysis. Mice survival and tumor growth were recorded. Student's t test or two-way ANOVA with correction was used for comparisons of groups. RESULTS The radiotherapy resulted in an increased expression of the intratumoral TGF-β1 and an enhanced infiltration of the Tregs in the breast cancer tissues. The intratumoral TGF-β1 was found mainly in the extracellular vesicles associated form both in the murine breast cancer model and in the human lung cancer tissues. Furthermore, radiation induced more TGF-β1EV secretion and higher percentage of Tregs by promoting the expression and phosphorylation of protein kinase C zeta (PKC-ζ). Importantly, we found that naringenin rather than 1D11 significantly improved radiotherapy efficacy with less side effects. Distinct from TGF-β1 neutralizing antibody 1D11, the mechanism of naringenin was to downregulate the radiation-activated superoxide-Zinc-PKC-ζ-TGF-β1EV pathway. CONCLUSIONS The superoxide-zinc-PKC-ζ-TGF-β1EV release pathway was elucidated to induce the accumulation of Tregs, resulting in radiotherapy resistance in the TME. Therefore, targeting PKC-ζ to counteract TGF-β1EV function could represent a novel strategy to overcome radiotherapy resistance in the treatment of breast cancer or other cancers. TRIAL REGISTRATION The using of patient tissues with malignant Non-Small Cell Lung Cancer (NSCLC) was approved by the ethics committees at Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China (NCC2022C-702, from June 8th, 2022).
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Affiliation(s)
- Fayun Zhang
- Protein and Peptide Pharmaceutical Laboratory, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China.
| | - Zifeng Zheng
- Protein and Peptide Pharmaceutical Laboratory, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Luoyang Wang
- School of Basic Medicine, Qingdao University, Qingdao, 266071, China
| | - Wenfeng Zeng
- Protein and Peptide Pharmaceutical Laboratory, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wenjing Wei
- Protein and Peptide Pharmaceutical Laboratory, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chunling Zhang
- Protein and Peptide Pharmaceutical Laboratory, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Ziran Zhao
- Thoracic Surgery Department, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital,, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
| | - Wei Liang
- Protein and Peptide Pharmaceutical Laboratory, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
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5
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Propionate-producing Veillonella parvula regulates the malignant properties of tumor cells of OSCC. Med Oncol 2023; 40:98. [PMID: 36808012 DOI: 10.1007/s12032-023-01962-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 01/28/2023] [Indexed: 02/23/2023]
Abstract
Oral squamous cell carcinoma (OSCC), main head and neck squamous cell carcinomas (HNSCCs), remains a global health concern with unknown pathogenesis. Veillonella parvula NCTC11810 was observed to decrease in saliva microbiome of OSCC patients in this study and the aim was to detect the novel role of Veillonella parvula NCTC11810 in regulating the biological characteristics of OSCC through TROP2/PI3K/Akt pathway. Oral microbial community changes of OSCC patients were detected by 16S rDNA gene sequencing technology. CCK8 assay, Transwell assay, and Annexin V-FITC/PI staining were used for proliferation, invasion, and apoptosis analysis of OSCC cell lines. Expression of proteins were determined by Western blotting analysis. Veillonella parvula NCTC11810 showed decreased in saliva microbiome of TROP2 high-expressed OSCC patients. Culture supernatant of Veillonella parvula NCTC11810 promoted the apoptosis and inhibited the proliferation and invasion ability of HN6 cells, while sodium propionate (SP), the main metabolite of Veillonella parvula NCTC11810, played a similar role through the inhibition of TROP2/PI3K/Akt pathway. Studies above supported the proliferation-inhibiting, invasion-inhibiting, and apoptosis-promoting function of Veillonella parvula NCTC11810 in OSCC cells which provided new insights into oral microbiota and their metabolite as a therapeutic method for OSCC patients with TROP2 high expressing.
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Wang K, Xuan Z, Liu X, Zheng M, Yang C, Wang H. Immunomodulatory role of metalloproteinase ADAM17 in tumor development. Front Immunol 2022; 13:1059376. [PMID: 36466812 PMCID: PMC9715963 DOI: 10.3389/fimmu.2022.1059376] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Accepted: 11/03/2022] [Indexed: 12/25/2023] Open
Abstract
ADAM17 is a member of the a disintegrin and metalloproteinase (ADAM) family of transmembrane proteases involved in the shedding of some cell membrane proteins and regulating various signaling pathways. More than 90 substrates are regulated by ADAM17, some of which are closely relevant to tumor formation and development. Besides, ADAM17 is also responsible for immune regulation and its substrate-mediated signal transduction. Recently, ADAM17 has been considered as a major target for the treatment of tumors and yet its immunomodulatory roles and mechanisms remain unclear. In this paper, we summarized the recent understanding of structure and several regulatory roles of ADAM17. Importantly, we highlighted the immunomodulatory roles of ADAM17 in tumor development, as well as small molecule inhibitors and monoclonal antibodies targeting ADAM17.
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Affiliation(s)
- Kai Wang
- Key Laboratory of Epigenetics and Oncology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, China
| | - Zixue Xuan
- Clinical Pharmacy Center, Department of Pharmacy, Zhejiang Provincial People’s Hospital, Affiliated People’s Hospital, Hangzhou Medical College, Hangzhou, China
| | - Xiaoyan Liu
- Key Laboratory of Epigenetics and Oncology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, China
| | - Meiling Zheng
- Key Laboratory of Epigenetics and Oncology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, China
| | - Chao Yang
- National Engineering Research Center for Marine Aquaculture, Institute of Innovation & Application, Zhejiang Ocean University, Zhoushan, China
| | - Haiyong Wang
- Department of Internal Medicine Oncology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
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7
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Liu X, Deng J, Yuan Y, Chen W, Sun W, Wang Y, Huang H, Liang B, Ming T, Wen J, Huang B, Xing D. Advances in Trop2-targeted therapy: Novel agents and opportunities beyond breast cancer. Pharmacol Ther 2022; 239:108296. [PMID: 36208791 DOI: 10.1016/j.pharmthera.2022.108296] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 09/27/2022] [Accepted: 09/28/2022] [Indexed: 11/07/2022]
Abstract
Trop2 is a transmembrane glycoprotein and calcium signal transducer with limited expression in normal human tissues. It is consistently overexpressed in a variety of malignant tumors and participates in several oncogenic signaling pathways that lead to tumor development, invasion, and metastasis. As a result, Trop2 has become an attractive therapeutic target in cancer treatment. The anti-Trop2 antibody-drug conjugate (Trodelvy™, sacituzumab govitecan) has been approved to treat metastatic triple-negative breast cancer. However, it is still unclear whether the success observed in Trop2-positive breast cancer could be replicated in other tumor types, owing to the differences in the expression levels and functions of Trop2 across cancer types. In this review, we summarize the recent progress on the structures and functions of Trop2 and highlight the potential diagnostic and therapeutic value of Trop2 beyond breast cancer. In addition, the promising novel Trop2-targeted agents in the clinic were discussed, which will likely alter the therapeutic landscape of Trop2-positive tumors in the future.
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Affiliation(s)
- Xinlin Liu
- Cancer Institute, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao Cancer Institute, Qingdao 266071, China
| | - Junwen Deng
- Cancer Institute, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao Cancer Institute, Qingdao 266071, China
| | - Yang Yuan
- Cancer Institute, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao Cancer Institute, Qingdao 266071, China
| | - Wujun Chen
- Cancer Institute, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao Cancer Institute, Qingdao 266071, China
| | - Wenshe Sun
- Cancer Institute, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao Cancer Institute, Qingdao 266071, China
| | - Yanhong Wang
- Cancer Institute, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao Cancer Institute, Qingdao 266071, China
| | - Haiming Huang
- Shanghai Asia United Antibody Medical Co., Ltd, Shanghai 201203, China
| | - Bing Liang
- Cancer Institute, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao Cancer Institute, Qingdao 266071, China
| | - Tao Ming
- Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
| | - Jialian Wen
- School of Social Science, The University of Manchester, Manchester, UK
| | - Binghuan Huang
- Cancer Institute, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao Cancer Institute, Qingdao 266071, China.
| | - Dongming Xing
- Cancer Institute, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao Cancer Institute, Qingdao 266071, China; School of Life Sciences, Tsinghua University, Beijing 100084, China.
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Trop-2, Na+/K+ ATPase, CD9, PKCα, cofilin assemble a membrane signaling super-complex that drives colorectal cancer growth and invasion. Oncogene 2022; 41:1795-1808. [DOI: 10.1038/s41388-022-02220-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 01/10/2022] [Accepted: 01/27/2022] [Indexed: 12/20/2022]
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Kamble PR, Patkar SR, Breed AA, Pathak BR. N-glycosylation status of Trop2 impacts its surface density, interaction with claudin-7 and exosomal release. Arch Biochem Biophys 2021; 714:109084. [PMID: 34774484 DOI: 10.1016/j.abb.2021.109084] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Revised: 10/24/2021] [Accepted: 11/08/2021] [Indexed: 12/31/2022]
Abstract
Trophoblast antigen 2 (Trop2) is a type I transmembrane protein post-translationally modified by N-linked glycosylation. It was originally detected in trophoblasts but was later shown to be frequently overexpressed in many epithelial cancers. Recently, anti-Trop2 antibody-drug conjugate has been FDA approved for the treatment of metastatic triple-negative breast and urothelial carcinomas, making it an important tumor antigen. The current study explored the significance of N-glycosylation of Trop2 by substituting specific N-glycan addition sites by site-directed mutagenesis. The mutant proteins were characterized in transiently transfected HEK293 cells. The N-glycosylation mutants did not affect protein expression, stability, dimerization ability and matriptase mediated cleavage. However, N120A and N208A mutants showed decreased interaction with its binding partner claudin-7. Our earlier reported Trop2 mutant V194A, which shows aberrant glycosylation, also displayed hampered interaction with claudin-7. To further characterize the mutants, stable clones expressing wild type and mutant Trop2 were generated in OVCAR3 cell line. Interestingly, surface biotinylation assay showed significantly higher surface expression of N120A and N208A mutants whereas surface localization was drastically reduced for V194A Trop2 mutant. Though overexpression of wild type Trop2 did not cause any change in fibronectin-mediated FAK (Focal adhesion kinase) signaling; expression of N120A mutant, surprisingly downregulated FAK signaling. Furthermore, exosomal release of Trop2 was also decreased in N120A and N208A mutants. This data suggests that site-specific N-glycan addition determines Trop2 surface density, claudin-7 interaction and exosomal release.
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Affiliation(s)
- Pradnya R Kamble
- Cellular and Structural Biology Division, ICMR-National Institute for Research in Reproductive Health, Mumbai, India
| | - Shivali R Patkar
- Cellular and Structural Biology Division, ICMR-National Institute for Research in Reproductive Health, Mumbai, India
| | - Ananya A Breed
- Cellular and Structural Biology Division, ICMR-National Institute for Research in Reproductive Health, Mumbai, India
| | - Bhakti R Pathak
- Cellular and Structural Biology Division, ICMR-National Institute for Research in Reproductive Health, Mumbai, India.
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Hammood M, Craig AW, Leyton JV. Impact of Endocytosis Mechanisms for the Receptors Targeted by the Currently Approved Antibody-Drug Conjugates (ADCs)-A Necessity for Future ADC Research and Development. Pharmaceuticals (Basel) 2021; 14:ph14070674. [PMID: 34358100 PMCID: PMC8308841 DOI: 10.3390/ph14070674] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 07/10/2021] [Accepted: 07/13/2021] [Indexed: 12/17/2022] Open
Abstract
Biologically-based therapies increasingly rely on the endocytic cycle of internalization and exocytosis of target receptors for cancer therapies. However, receptor trafficking pathways (endosomal sorting (recycling, lysosome localization) and lateral membrane movement) are often dysfunctional in cancer. Antibody-drug conjugates (ADCs) have revitalized the concept of targeted chemotherapy by coupling inhibitory antibodies to cytotoxic payloads. Significant advances in ADC technology and format, and target biology have hastened the FDA approval of nine ADCs (four since 2019). Although the links between aberrant endocytic machinery and cancer are emerging, the impact of dysregulated internalization processes of ADC targets and response rates or resistance have not been well studied. This is despite the reliance on ADC uptake and trafficking to lysosomes for linker cleavage and payload release. In this review, we describe what is known about all the target antigens for the currently approved ADCs. Specifically, internalization efficiency and relevant intracellular sorting activities are described for each receptor under normal processes, and when complexed to an ADC. In addition, we discuss aberrant endocytic processes that have been directly linked to preclinical ADC resistance mechanisms. The implications of endocytosis in regard to therapeutic effectiveness in the clinic are also described. Unexpectedly, information on endocytosis is scarce (absent for two receptors). Moreover, much of what is known about endocytosis is not in the context of receptor-ADC/antibody complexes. This review provides a deeper understanding of the pertinent principles of receptor endocytosis for the currently approved ADCs.
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Affiliation(s)
- Manar Hammood
- Departément de Medécine Nucléaire et Radiobiologie, Faculté de Medécine et des Sciences de la Santé, Centre Hospitalier Universitaire de Sherbrooke (CHUS), Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada;
| | - Andrew W. Craig
- Department of Biomedical and Molecular Sciences, Queen’s University, Kingston, ON K7L 3N6, Canada;
| | - Jeffrey V. Leyton
- Departément de Medécine Nucléaire et Radiobiologie, Faculté de Medécine et des Sciences de la Santé, Centre Hospitalier Universitaire de Sherbrooke (CHUS), Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada;
- Centre d’Imagerie Moleculaire, Centre de Recherche, CHUS, Sherbrooke, QC J1H 5N4, Canada
- Correspondence: ; Tel.: +1-819-346-1110
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11
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Kushiyama S, Yashiro M, Yamamoto Y, Sera T, Sugimoto A, Nishimura S, Togano S, Kuroda K, Yoshii M, Tamura T, Toyokawa T, Tanaka H, Muguruma K, Nakada H, Ohira M. Clinicopathologic significance of TROP2 and phospho-TROP2 in gastric cancer. Mol Clin Oncol 2021; 14:105. [PMID: 33815794 PMCID: PMC8010512 DOI: 10.3892/mco.2021.2267] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 01/19/2021] [Indexed: 01/04/2023] Open
Abstract
Trophoblast cell-surface antigen 2 (TROP2) is a transmembrane glycoprotein expressed in epithelial cells. Increased TROP2 expression has been reported to be associated with malignant progression in most carcinomas; however, TROP2 has a tumor-suppressive function in certain types of cancer. Since the function of TROP2 is controversial, the present study subsequently aimed to clarify the clinicopathologic significance of TROP2 and pTROP2 expression in human gastric cancer (GC). The cases of 704 patients with GC who underwent gastrectomy were retrospectively analyzed. The expression levels of TROP2 and pTROP2 in each tumor were evaluated by immunohistochemistry. The association between the clinicopathologic features of patients with GC and the levels of TROP2 and pTROP2 in their tumors was analyzed. Increased TROP2 and pTROP2 expression was identified in 330 (46.9%) and 306 (43.5%) of the 704 patients with GC, respectively. Increased TROP2 expression was associated with the histological intestinal type, high tumor invasion depth (T3/T4), lymph node metastasis, lymphatic invasion and venous invasion. By contrast, increased pTROP2 expression was associated with intestinal type, low tumor invasion depth (T1/2), no lymph node metastasis and no lymphatic invasion. Increased TROP2 expression was associated with poorer overall survival (OS) (P<0.01; log rank test), whereas increased pTROP2 expression was significantly associated with improved OS (P<0.01; log rank test). In conclusion, increased expression levels of TROP2, but not pTROP2, may be associated with the metastatic ability of GC, resulting in poor prognosis of patients with GC.
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Affiliation(s)
- Shuhei Kushiyama
- Department of Gastroenterological Surgery, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan.,Department of Molecular Oncology and Therapeutics, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan.,Cancer Center for Translational Research, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Masakazu Yashiro
- Department of Gastroenterological Surgery, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan.,Department of Molecular Oncology and Therapeutics, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan.,Cancer Center for Translational Research, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Yurie Yamamoto
- Department of Molecular Oncology and Therapeutics, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan.,Cancer Center for Translational Research, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Tomohiro Sera
- Department of Gastroenterological Surgery, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan.,Department of Molecular Oncology and Therapeutics, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan.,Cancer Center for Translational Research, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Atsushi Sugimoto
- Department of Gastroenterological Surgery, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan.,Department of Molecular Oncology and Therapeutics, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan.,Cancer Center for Translational Research, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Sadaaki Nishimura
- Department of Gastroenterological Surgery, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan.,Department of Molecular Oncology and Therapeutics, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan.,Cancer Center for Translational Research, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Shingo Togano
- Department of Gastroenterological Surgery, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan.,Department of Molecular Oncology and Therapeutics, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan.,Cancer Center for Translational Research, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Kenji Kuroda
- Department of Gastroenterological Surgery, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan.,Department of Molecular Oncology and Therapeutics, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan.,Cancer Center for Translational Research, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Mami Yoshii
- Department of Gastroenterological Surgery, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Tatsuro Tamura
- Department of Gastroenterological Surgery, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Takahiro Toyokawa
- Department of Gastroenterological Surgery, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Hiroaki Tanaka
- Department of Gastroenterological Surgery, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Kazuya Muguruma
- Department of Gastroenterological Surgery, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan
| | - Hiroshi Nakada
- Department of Molecular Biosciences, Faculty of Life Science, Kyoto Sangyo University, Kyoto 603-8555, Japan
| | - Masaichi Ohira
- Department of Gastroenterological Surgery, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan
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12
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Kamble PR, Rane S, Breed AA, Joseph S, Mahale SD, Pathak BR. Proteolytic cleavage of Trop2 at Arg87 is mediated by matriptase and regulated by Val194. FEBS Lett 2020; 594:3156-3169. [PMID: 32761920 DOI: 10.1002/1873-3468.13899] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 06/22/2020] [Accepted: 07/13/2020] [Indexed: 01/08/2023]
Abstract
Proteolytic processing is an important post-translational modification affecting protein activity and stability. In the current study, we investigate the N-terminal cleavage of Trop2, a protein which is overexpressed in many cancers. We demonstrate that Trop2 is cleaved at Arg87 by a transmembrane serine protease, matriptase. Homology modeling and site-directed mutagenesis of amino acids in close proximity to the matriptase cleavage site reveal the importance of Val194 in regulating Trop2 cleavage. Co-immunoprecipitation studies confirm that amino acid substitutions at Arg87, Thr88, Lys189, Val194, and His195 do not affect Trop2 dimerization. However, cleavage of wild-type Trop2 by matriptase is inhibited when it is allowed to dimerize with a V194 A mutant monomer, further confirming the role of Val194 in matriptase-mediated N-terminal cleavage.
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Affiliation(s)
- Pradnya R Kamble
- Division of Structural Biology, ICMR-National Institute for Research in Reproductive Health, Mumbai, India
| | - Sanjana Rane
- Division of Structural Biology, ICMR-National Institute for Research in Reproductive Health, Mumbai, India
| | - Ananya A Breed
- Division of Structural Biology, ICMR-National Institute for Research in Reproductive Health, Mumbai, India
| | - Shaini Joseph
- Genetic Research Center, ICMR-National Institute for Research in Reproductive Health, Mumbai, India
| | - Smita D Mahale
- Division of Structural Biology, ICMR-National Institute for Research in Reproductive Health, Mumbai, India
| | - Bhakti R Pathak
- Division of Structural Biology, ICMR-National Institute for Research in Reproductive Health, Mumbai, India
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13
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Zhang B, Gao S, Li R, Li Y, Cao R, Cheng J, Guo Y, Wang E, Huang Y, Zhang K. Tissue mechanics and expression of TROP2 in oral squamous cell carcinoma with varying differentiation. BMC Cancer 2020; 20:815. [PMID: 32854652 PMCID: PMC7450929 DOI: 10.1186/s12885-020-07257-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 08/04/2020] [Indexed: 12/15/2022] Open
Abstract
Background Trophoblast cell surface antigen 2 (TROP2) is overexpressed in many squamous cell carcinomas and promotes tumor development and invasion. The association between TROP2 expression and occurrence and development of oral squamous cell carcinoma (OSCC) remains to be understood. Methods We investigated the role of TROP2 in OSCC patients using a combination of biophysical approaches. A total of 108 OSCC patient specimens with varying degrees of differentiation were subjected to hematoxylin and eosin staining, immunohistochemistry, Kaplan-Meier survival curve analysis, and atomic force microscopy to analyze TROP2 expression, morphology, and mechanical properties of OSCC tissues. Results TROP2 was overexpressed in 34% of poorly differentiated OSCC samples. High levels of TROP2 were associated with 10.2% survival rate lower than 45.4% and patient age (odds ratio [OR] = 0.437, P = 0.039, 95% confidence interval [CI, 0.198–0.966]), tumor size (OR = 13.148, P = 0.000, 95% CI [5.060–34.168]), and TNM stage (OR = 0.141, P = 0.000, 95% CI [0.082–0.244]). Average surface roughness of low, medium, and highly differentiated OSCC tissues were 448.9 ± 54.8, 792.7 ± 83.6, and 993.0 ± 104.3 nm, respectively. The Pearson coefficient revealed a negative association between tumor stiffness and TROP2 expression (r = − 0.84, P < 0.01). Conclusion Overexpression of TROP2 negatively associated with patient survival, degree of tumor differentiation, and tissue mechanics. Taken together, our findings demonstrated that TROP2 may be an indicator of OSCC differentiation leading to the altered mechanical properties of OSCC tissues.
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Affiliation(s)
- Baoping Zhang
- Department (Hospital) of Stomatology, Lanzhou University, Donggang west Road 199, Lanzhou, 730000, Gansu, China.,Institute of Biomechanics and Medical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Shuting Gao
- Department (Hospital) of Stomatology, Lanzhou University, Donggang west Road 199, Lanzhou, 730000, Gansu, China
| | - Ruiping Li
- Department (Hospital) of Stomatology, Lanzhou University, Donggang west Road 199, Lanzhou, 730000, Gansu, China
| | - Yiting Li
- Department (Hospital) of Stomatology, Lanzhou University, Donggang west Road 199, Lanzhou, 730000, Gansu, China
| | - Rui Cao
- Department (Hospital) of Stomatology, Lanzhou University, Donggang west Road 199, Lanzhou, 730000, Gansu, China
| | - Jingyang Cheng
- Department (Hospital) of Stomatology, Lanzhou University, Donggang west Road 199, Lanzhou, 730000, Gansu, China
| | - Yumeng Guo
- Department (Hospital) of Stomatology, Lanzhou University, Donggang west Road 199, Lanzhou, 730000, Gansu, China
| | - Errui Wang
- Department (Hospital) of Stomatology, Lanzhou University, Donggang west Road 199, Lanzhou, 730000, Gansu, China
| | - Ying Huang
- Department (Hospital) of Stomatology, Lanzhou University, Donggang west Road 199, Lanzhou, 730000, Gansu, China
| | - Kailiang Zhang
- Department (Hospital) of Stomatology, Lanzhou University, Donggang west Road 199, Lanzhou, 730000, Gansu, China.
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14
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Abstract
Rapidly increasing scientific reports of exosomes and their biological effects have improved our understanding of their cellular sources and their cell-to-cell communication. These nano-sized vesicles act as potent carriers of regulatory bio-macromolecules and can induce regulatory functions by delivering them from its source to recipient cells. The details of their communication network are less understood. Recent studies have shown that apart from delivering its cargo to the cells, it can directly act on extracellular matrix (ECM) proteins and growth factors and can induce various remodeling events. More importantly, exosomes carry many surface-bound proteases, which can cleave different ECM proteins and carbohydrates and can shed cell surface receptors. These local extracellular events can modulate signaling cascades, which consequently influences the whole tissue and organ. This review aims to highlight the critical roles of exosomal proteases and their mechanistic insights within the cellular and extracellular environment.
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15
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Tang G, Tang Q, Jia L, Chen Y, Lin L, Kuai X, Gong A, Feng Z. TROP2 increases growth and metastasis of human oral squamous cell carcinoma through activation of the PI3K/Akt signaling pathway. Int J Mol Med 2019; 44:2161-2170. [PMID: 31638186 PMCID: PMC6844621 DOI: 10.3892/ijmm.2019.4378] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Accepted: 09/20/2019] [Indexed: 12/18/2022] Open
Abstract
Most malignant neoplasms of the oral cavity are oral squamous cell carcinoma (OSCC), which is a type of highly malignant tumor with a propensity for forming distant metastases. Trophoblast cell surface antigen 2 (TROP2) is a transmembrane protein that is overexpressed in several types of tumor cells, although its role and regulatory mechanism in OSCC have not been determined. The aim of the present study was to examine the effects of TROP2 in human OSCC cell lines. The present study demonstrated that TROP2 protein expression was upregulated in OSCC cell lines. Transfection of short hairpin RNA (shRNA) targeting TROP2 (sh‑TROP2) reduced cell proliferation, migration and invasion of OSCC cell lines, whereas overexpression of TROP2 increased proliferation, migration and invasion. sh‑TROP2 transfection in OSCC cell lines inhibited tumor growth in OSCC mouse models. Furthermore, TROP2 expression activated the phosphoinositide 3‑kinase (PI3K)/Akt signaling pathway in human OSCC cells. These results suggest that TROP2 induces cell growth, migration and invasion through activation of the PI3K/Akt signaling pathway in OSCC cells.
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Affiliation(s)
- Genxiong Tang
- Department of Stomatology, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210008, P.R. China
| | - Qi Tang
- National Health Commission Key Laboratory of Antibody Technique, Nanjing Medical University, Nanjing, Jiangsu 211166, P.R. China
| | - Lizhou Jia
- National Health Commission Key Laboratory of Antibody Technique, Nanjing Medical University, Nanjing, Jiangsu 211166, P.R. China
| | - Yuan Chen
- Department of Otolaryngology, Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210011, P.R. China
| | - Liangyuan Lin
- Department of Stomatology, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210008, P.R. China
| | - Xingwang Kuai
- Department of Basic Medicine, Jiangsu College of Nursing, Huai'an, Jiangsu 223001, P.R. China
| | - Aixiu Gong
- Department of Stomatology, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu 210008, P.R. China
| | - Zhengqing Feng
- Department of Pathology, Nanjing Medical University, Nanjing, Jiangsu 211166, P.R. China
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16
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Zhao W, Jia L, Kuai X, Tang Q, Huang X, Yang T, Qiu Z, Zhu J, Huang J, Huang W, Feng Z. The role and molecular mechanism of Trop2 induced epithelial-mesenchymal transition through mediated β-catenin in gastric cancer. Cancer Med 2019; 8:1135-1147. [PMID: 30632714 PMCID: PMC6434498 DOI: 10.1002/cam4.1934] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 08/30/2018] [Accepted: 10/29/2018] [Indexed: 12/24/2022] Open
Abstract
The present study elucidates the potential role of Trop2 in tumor invasion and the promotion of epithelial‐mesenchymal transition (EMT) when binding β‐catenin in GC. The role of Trop2 in promoting EMT in GC cells was examined by a variety of experimental assays. Moreover, the underlying molecular mechanism of Trop2 in promoting EMT was studied by in vivo and in vitro assays. The Trop2 expression in relation to tumor metastasis status was detected by IHC in 248 cases of GC tissues and 86 cases of matched adjacent tissues. Trop2 promoted the metastasis and induces EMT in GC. Meanwhile, the elevated protein levels of Trop2 and mesenchymal markers were also found in the TGF‐β1‐induced EMT model in GC cells. Importantly, Trop2 physically bound and activated β‐catenin to promote EMT; moreover, Trop2 increased the accumulation of β‐catenin in the nucleus to accelerate metastasis in GC cells. Inhibition of Trop2 expression in GC cells prevented the migration and invasion of GC cells in vivo. Trop2+/vimentin+ expression was higher in GC tissues than that in matched adjacent tissues, and Trop2+/vimentin+ expression in GC was associated with the differentiation, TNM stage, and distant metastases. These sets of data reveal a novel regulatory network of Trop2 in EMT and GC metastasis, suggesting Trop2 as a useful marker for inducing EMT and metastasis of GC, which may help to lead a better understanding of the pathogenesis of the GC.
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Affiliation(s)
- Wei Zhao
- Department of Pathology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China.,Department of Pathology, Nanjing Medical University, Nanjing, China.,Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing, China
| | - Lizhou Jia
- Department of Pathology, Nanjing Medical University, Nanjing, China.,Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing, China
| | - Xingwang Kuai
- Department of Pathology, Nanjing Medical University, Nanjing, China.,Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing, China
| | - Qi Tang
- Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing, China
| | - Xiaochen Huang
- Department of Pathology, Nanjing Medical University, Nanjing, China.,Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing, China
| | - Tingting Yang
- Department of Pathology, Nanjing Medical University, Nanjing, China.,Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing, China
| | - Zhenning Qiu
- Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing, China
| | - Jin Zhu
- Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing, China.,Huadong Medical Institute of Biotechniques, Nanjing, China
| | - Jianfei Huang
- Department of Pathology, Affiliated Hospital of Nantong University, Nantong, China
| | - Wenbin Huang
- Department of Pathology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Zhenqing Feng
- Department of Pathology, Nanjing Medical University, Nanjing, China.,Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing, China.,Jiangsu Key Lab. of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Cancer Personalized Medicine, Nanjing Medical University, Nanjing, China
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17
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Tang G, Tang Q, Jia L, Xia S, Li J, Chen Y, Li H, Ding X, Wang F, Hou D, Kuai X, Feng Z, Fan Y. High expression of TROP2 is correlated with poor prognosis of oral squamous cell carcinoma. Pathol Res Pract 2018; 214:1606-1612. [PMID: 30098828 DOI: 10.1016/j.prp.2018.07.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 07/04/2018] [Accepted: 07/22/2018] [Indexed: 01/30/2023]
Abstract
Human trophoblastic cell-surface antigen 2 (TROP2) is a cell surface glycoprotein that exhibits high expression in various carcinomas but low or no expression in normal tissues. High TROP2 expression plays an important role in promoting tumor development and aggressiveness, which is correlated with reduced patient survival. However, there are few studies regarding TROP2 in relation to both oral squamous cell carcinoma (OSCC) and oral potentially malignant lesions. The expression of TROP2 protein and mRNA was investigated in OSCC tissues, oral potentially malignant lesion tissues, and normal oral tissues using immunohistochemistry and quantitative real-time polymerase chain reaction (qRT-PCR). The association between TROP2 expression and clinicopathological characteristics of OSCC was also analyzed, and the prognostic value of TROP2 was evaluated. The expression of TROP2 protein and mRNA were both higher in OSCC tissues than in oral potentially malignant lesion tissues or normal oral tissues. Positive TROP2 expression was related to differentiation, lymph node metastases, TNM stage, perineural infiltration, and vascular invasion. Poor overall survival was associated with high TROP2 expression and other factors associated with poor overall survival including poor differentiation, lymph node metastasis, TNM stage, vascular invasion, and perineural invasion in univariate analyses. TROP2 expression as well as TNM stage and vascular invasion were independent prognostic factors associated with the overall survival of OSCC patients in multivariate analyses. In summary, High TROP2 expression is associated with poor overall survival and serves as an independent prognostic factor in OSCC. The results suggest that TROP2 expression could be an effective prognostic biomarker for OSCC.
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Affiliation(s)
- Genxiong Tang
- Department of Stomatology, Affiliated Children's Hospital of Nanjing Medical University, Nanjing 210008, China; Department of Pathology, Nanjing Medical University, Nanjing 211166, China; Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University; Department of Oral Medicine, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing 210029, China
| | - Qi Tang
- Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing 211166, China
| | - Lizhou Jia
- Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing 211166, China
| | - Shujing Xia
- Department of Gastroenterology, Affiliated Xinghua People's Hospital of Yangzhou University, Xinghua 225700, China
| | - Jing Li
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University; Department of Oral Medicine, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing 210029, China
| | - Yuan Chen
- Department of Otolaryngology, Second Affiliated Hospital of Nanjing Medical University, Nanjing 210011, China
| | - Huaiqi Li
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing 210029, China
| | - Xu Ding
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing 210029, China
| | - Feng Wang
- Department of Pathology, Nanjing Medical University, Nanjing 211166, China
| | - Deqiang Hou
- Department of Stomatology, Affiliated Hospital of Jiangnan University, Wuxi 214062, China
| | - Xingwang Kuai
- Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing 211166, China
| | - Zhenqing Feng
- Department of Pathology, Nanjing Medical University, Nanjing 211166, China; Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing 211166, China; Jiangsu Collaborative Innovation Center for Cancer Personalized Medicine, Nanjing Medical University, Nanjing 211166, China; Key Laboratory of Cancer Biomarkers, Prevent and Treatment, Cancer Center, Nanjing Medical University, Nanjing 211166, China.
| | - Yuan Fan
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University; Department of Oral Medicine, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing 210029, China.
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18
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Sekhar V, Pollicino T, Diaz G, Engle RE, Alayli F, Melis M, Kabat J, Tice A, Pomerenke A, Altan-Bonnet N, Zamboni F, Lusso P, Emerson SU, Farci P. Infection with hepatitis C virus depends on TACSTD2, a regulator of claudin-1 and occludin highly downregulated in hepatocellular carcinoma. PLoS Pathog 2018. [PMID: 29538454 PMCID: PMC5882150 DOI: 10.1371/journal.ppat.1006916] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Entry of hepatitis C virus (HCV) into hepatocytes is a complex process that involves numerous cellular factors, including the scavenger receptor class B type 1 (SR-B1), the tetraspanin CD81, and the tight junction (TJ) proteins claudin-1 (CLDN1) and occludin (OCLN). Despite expression of all known HCV-entry factors, in vitro models based on hepatoma cell lines do not fully reproduce the in vivo susceptibility of liver cells to primary HCV isolates, implying the existence of additional host factors which are critical for HCV entry and/or replication. Likewise, HCV replication is severely impaired within hepatocellular carcinoma (HCC) tissue in vivo, but the mechanisms responsible for this restriction are presently unknown. Here, we identify tumor-associated calcium signal transducer 2 (TACSTD2), one of the most downregulated genes in primary HCC tissue, as a host factor that interacts with CLDN1 and OCLN and regulates their cellular localization. TACSTD2 gene silencing disrupts the typical linear distribution of CLDN1 and OCLN along the cellular membrane in both hepatoma cells and primary human hepatocytes, recapitulating the pattern observed in vivo in primary HCC tissue. Mechanistic studies suggest that TACSTD2 is involved in the phosphorylation of CLDN1 and OCLN, which is required for their proper cellular localization. Silencing of TACSTD2 dramatically inhibits HCV infection with a pan-genotype effect that occurs at the level of viral entry. Our study identifies TACSTD2 as a novel regulator of two major HCV-entry factors, CLDN1 and OCLN, which is strongly downregulated in malignant hepatocytes. These results provide new insights into the complex process of HCV entry into hepatocytes and may assist in the development of more efficient cellular systems for HCV propagation in vitro.
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Affiliation(s)
- Vandana Sekhar
- Hepatic Pathogenesis Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Teresa Pollicino
- Hepatic Pathogenesis Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
- Division of Clinical and Molecular Hepatology, Department of Human Pathology, University of Messina, Messina, Italy
| | - Giacomo Diaz
- Department of Biomedical Sciences, University of Cagliari, Cagliari, Italy
| | - Ronald E. Engle
- Hepatic Pathogenesis Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Farah Alayli
- Hepatic Pathogenesis Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Marta Melis
- Hepatic Pathogenesis Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Juraj Kabat
- Biological Imaging Facility/Research Technologies Branch, National Institute of Allergy and Infectious Disease, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Ashley Tice
- Hepatic Pathogenesis Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Anna Pomerenke
- Hepatic Pathogenesis Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Nihal Altan-Bonnet
- Laboratory of Host-Pathogen Dynamics, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Fausto Zamboni
- Liver Transplantation Center, Brotzu Hospital, Cagliari, Italy
| | - Paolo Lusso
- Viral Pathogenesis Section, Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Suzanne U. Emerson
- Molecular Hepatitis Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Patrizia Farci
- Hepatic Pathogenesis Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
- * E-mail:
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19
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Xu P, Zhao Y, Liu K, Lin S, Liu X, Wang M, Yang P, Tian T, Zhu YY, Dai Z. Prognostic role and clinical significance of trophoblast cell surface antigen 2 in various carcinomas. Cancer Manag Res 2017; 9:821-837. [PMID: 29276405 PMCID: PMC5731441 DOI: 10.2147/cmar.s147033] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Introduction Trophoblast cell surface antigen 2 (TROP2) has been linked to disease prognosis in various human cancers and plays a critical role in tumor development, progression, and metastasis. A number of relevant studies have been published on this topic. A meta-analysis of the latest literature to evaluate the value of TROP2 as a predictive prognosticator of cancer was performed. Methods Several online databases were searched, and relevant articles were retrieved. Overall and subcategory meta-analyses were performed, and results were collated. Results Twenty-seven articles, including 29 studies, were included, involving 4,852 cancer patients, and results showed that the above-baseline expression of TROP2 was significantly associated with poorer overall survival (OS) (pooled hazard ratio [HR]: 1.84, 95% confidence interval [CI]: 1.45–2.35), disease-free survival (DFS) (pooled HR: 2.77, 95% CI: 1.73–4.42), and progression-free survival (PFS) (pooled HR: 1.71, 95% CI: 1.25–2.35). The following clinical characteristics were also significantly linked with TROP2 overexpression: moderate/poor differentiation (pooled HR: 3.03, 95% CI: 1.99–4.63), distant metastasis (pooled HR: 2.46, 95% CI: 1.05–5.75), lymph node metastasis (pooled HR: 2.47, 95%: CI 1.72–3.56), and advanced TNM stage (pooled HR: 2.02, 95% CI: 1.38–2.95). Conclusion TROP2 overexpression was predictive of poor prognosis in human cancers and may be an independent prognostic predictive biomarker. Further studies should be performed to confirm the significance of TROP2 in clinical practice.
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Affiliation(s)
- Peng Xu
- Department of Oncology, The Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Yang Zhao
- Department of Oncology, The Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Kang Liu
- Department of Oncology, The Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Shuai Lin
- Department of Oncology, The Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Xinghan Liu
- Department of Oncology, The Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Meng Wang
- Department of Oncology, The Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Pengtao Yang
- Department of Oncology, The Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Tian Tian
- Department of Oncology, The Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Yu-Yao Zhu
- Department of Oncology, The Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Zhijun Dai
- Department of Oncology, The Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
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20
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Recent Advances in ADAM17 Research: A Promising Target for Cancer and Inflammation. Mediators Inflamm 2017; 2017:9673537. [PMID: 29230082 PMCID: PMC5688260 DOI: 10.1155/2017/9673537] [Citation(s) in RCA: 117] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 08/15/2017] [Accepted: 09/11/2017] [Indexed: 02/06/2023] Open
Abstract
Since its discovery, ADAM17, also known as TNFα converting enzyme or TACE, is now known to process over 80 different substrates. Many of these substrates are mediators of cancer and inflammation. The field of ADAM metalloproteinases is at a crossroad with many of the new potential therapeutic agents for ADAM17 advancing into the clinic. Researchers have now developed potential drugs for ADAM17 that are selective and do not have the side effects which were seen in earlier chemical entities that targeted this enzyme. ADAM17 inhibitors have broad therapeutic potential, with properties ranging from tumor immunosurveillance and overcoming drug and radiation resistance in cancer, as treatments for cardiac hypertrophy and inflammatory conditions such as inflammatory bowel disease and rheumatoid arthritis. This review focuses on substrates and inhibitors identified more recently for ADAM17 and their role in cancer and inflammation.
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Ma Y, Zhao Y, Zhang R, Liang X, Yin Z, Geng Y, Shu G, Song X, Zou Y, Li L, Yin L, Yue G, Li Y, Ye G, He C. Astragaloside IV inhibits PMA-induced EPCR shedding through MAPKs and PKC pathway. Immunopharmacol Immunotoxicol 2017; 39:148-156. [PMID: 28367652 DOI: 10.1080/08923973.2017.1306868] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Astragaloside IV (AS-IV), a main active substance isolated from Astragalus membranaceus Bunge, has been shown to have multiple pharmacological effects. Endothelial cell protein C receptor (EPCR) is a marker of inflammation, and is also a major member of protein C (PC) anti-coagulation system. EPCR can be cut off from the cell surface by tumor necrosis factor-α converting enzyme (TACE), which is controlled through mitogen-activated protein kinase (MAPK) and protein kinase C (PKC) pathways. To develop novel therapeutic drug for EPCR shedding, the effect of AS-IV was studied in phorbol-12-myristate 13-acetate (PMA)-induced human umbilical vein endothelial cells (HUVECs) and the potential molecular mechanism of AS-IV action was investigated. The results showed that AS-IV could significantly inhibit PMA-induced EPCR shedding. In further study, AS-IV suppressed the expression and activity of TACE. In addition, AS-IV could decrease the phosphorylation of MAPK such as janus kinase (JNK) and p38, and inhibit activation of PKC through the prevention of non-phosphorylation and phosphorylation of specific PKC isoforms in PMA-stimulated HUVECs. These findings indicate that AS-IV may be used as a natural medicine to treat EPCR-related systemic inflammation and cardiovascular diseases by targeting MAPK and PKC pathway.
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Affiliation(s)
- Yu Ma
- a Natural Medicine Research Center, College of Veterinary Medicine , Sichuan Agricultural University , Chengdu , PR China
| | - Yi Zhao
- a Natural Medicine Research Center, College of Veterinary Medicine , Sichuan Agricultural University , Chengdu , PR China
| | - Ran Zhang
- a Natural Medicine Research Center, College of Veterinary Medicine , Sichuan Agricultural University , Chengdu , PR China
| | - Xiaoxia Liang
- a Natural Medicine Research Center, College of Veterinary Medicine , Sichuan Agricultural University , Chengdu , PR China
| | - Zhongqiong Yin
- a Natural Medicine Research Center, College of Veterinary Medicine , Sichuan Agricultural University , Chengdu , PR China
| | - Yi Geng
- b Department of Pharmacy , Sichuan Agricultural University , Chengdu , PR China
| | - Gang Shu
- b Department of Pharmacy , Sichuan Agricultural University , Chengdu , PR China
| | - Xu Song
- a Natural Medicine Research Center, College of Veterinary Medicine , Sichuan Agricultural University , Chengdu , PR China
| | - Yuanfeng Zou
- a Natural Medicine Research Center, College of Veterinary Medicine , Sichuan Agricultural University , Chengdu , PR China
| | - Lixia Li
- a Natural Medicine Research Center, College of Veterinary Medicine , Sichuan Agricultural University , Chengdu , PR China
| | - Lizi Yin
- a Natural Medicine Research Center, College of Veterinary Medicine , Sichuan Agricultural University , Chengdu , PR China
| | - Guizhou Yue
- c College of Science , Sichuan Agricultural University , Ya'an , PR China
| | - Yinglun Li
- b Department of Pharmacy , Sichuan Agricultural University , Chengdu , PR China
| | - Gang Ye
- b Department of Pharmacy , Sichuan Agricultural University , Chengdu , PR China
| | - Changliang He
- a Natural Medicine Research Center, College of Veterinary Medicine , Sichuan Agricultural University , Chengdu , PR China
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Zhao W, Ding G, Wen J, Tang Q, Yong H, Zhu H, Zhang S, Qiu Z, Feng Z, Zhu J. Correlation between Trop2 and amphiregulin coexpression and overall survival in gastric cancer. Cancer Med 2017; 6:994-1001. [PMID: 28256068 PMCID: PMC5430091 DOI: 10.1002/cam4.1018] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 11/14/2016] [Accepted: 12/27/2016] [Indexed: 12/28/2022] Open
Abstract
Gastric cancer (GC) is a multistep and multistage disease and the majority of GC cells could overexpressed one or more oncogenes. Trop2 and amphiregulin (AREG) are both overexpressed in various epithelial cell cancers and have the role in the increases tumor cells division and metastasis. However, little is known about the function and correlation of two oncogenes coexpressed in GC. The expression level of these two genes in 791 cases of GC tissues were tested, the correlations between two genes expression and clinical pathological characteristics and overall survival in GC patients through immunohistochemistry (IHC) were analyzed. This study also explored the mRNA expression level of two genes in 26 cases of freshly GC tissues by qRT‐PCR. The results indicated that Trop2+/AREG+ coexpression was higher in GC tissues than in adjacent tissues. Trop2+/AREG+ protein coexpression were associated with Tumor Node Metastasis (TNM) stage (χ2 = 50.345, P < 0.001), tumor size (χ2 = 40.349, P < 0.001), lymph node metastases (χ2 = 26.481, P < 0.001), and distant metastases (χ2 = 8.387, P = 0.039). GC patients with Trop2+ and AREG+ protein coexpression had poor overall survival rates (HR = 3.682, 95% CI = 2.038–6.654, P < 0.001). The expression level of Trop2/AREG were positively correlated (r 0.254 and P < 0.001). The result of the mRNA expression was similar to that of the protein expression. Overall, Trop2 and AREG could be seen as prognostic cobiomarker in GC and combined detection of Trop2 and AREG could be viewed as helpful in predicting the prognosis of the GC patients.
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Affiliation(s)
- Wei Zhao
- Department of Pathology, Nanjing Medical University, Nanjing, 210029, China.,School of Public Health, Nantong University, Nantong, 226019, China
| | - Guipeng Ding
- Department of Pathology, Nanjing Medical University, Nanjing, 210029, China
| | - Jinbo Wen
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing, 210029, China
| | - Qi Tang
- Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing, 210029, China
| | - Hongmei Yong
- Department of Oncology, Huai'an Hospital Affiliated of Xuzhou Medical College and Huai'an Second People's Hospital, Huai'an, 223001, China
| | - Huijun Zhu
- Department of Pathology, Affiliated Hospital of Nantong University, Nantong, 226019, China
| | - Shu Zhang
- Department of Pathology, Affiliated Hospital of Nantong University, Nantong, 226019, China
| | - Zhenning Qiu
- Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing, 210029, China
| | - Zhenqing Feng
- Department of Pathology, Nanjing Medical University, Nanjing, 210029, China.,Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing, 210029, China.,Jiangsu Collaborative Innovation Center for Cancer Personalized Medicine, Nanjing Medical University, Nanjing, 210029, China.,Key Laboratory of Cancer Biomarkers, Prevent and Treatment, Cancer Center, Nanjing Medical University, Nanjing, 210029, China
| | - Jin Zhu
- Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing, 210029, China.,Huadong Medical Institute of Biotechniques, Nanjing, 210029, China
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23
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Zhao W, Zhu H, Zhang S, Yong H, Wang W, Zhou Y, Wang B, Wen J, Qiu Z, Ding G, Feng Z, Zhu J. Trop2 is overexpressed in gastric cancer and predicts poor prognosis. Oncotarget 2017; 7:6136-45. [PMID: 26716416 PMCID: PMC4868745 DOI: 10.18632/oncotarget.6733] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Accepted: 12/08/2015] [Indexed: 12/20/2022] Open
Abstract
The cell surface protein Trop2 is overexpressed in a variety of human cancers. Trop2 expression increases tumor development and metastasis and reduces patient survival. However, little is known about the role of Trop2 expression and its prognostic value in gastric cancer (GC), particularly in Chinese populations. We analyzed Trop2 expression in GC tissues collected from Chinese GC patients. Quantitative real-time polymerase chain reaction (qRT-PCR) and immunohistochemistry on tissue microarrays were performed to assess levels of Trop2 mRNA and protein in GC, and correlations between Trop2 expression and clinical characteristics and prognosis were analyzed. Trop2 expression was higher in GC tissues than in neighboring non-tumor tissues. Increased Trop2 protein levels in GC were associated with increased differentiation, tumor node metastasis stage, tumor size, lymph node metastasis, distant metastasis, and H. pylori infection. GC patients with high Trop2 expression also had poor overall survival rates. These data suggest Trop2 is a useful prognostic biomarker for GC.
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Affiliation(s)
- Wei Zhao
- Department of Pathology, Nanjing Medical University, Nanjing 210029, China.,School of Public Health, Nantong University, Nantong 226019, China
| | - Huijun Zhu
- Department of Pathology, Affiliated Hospital of Nantong University, Nantong 226019, China
| | - Shu Zhang
- Department of Pathology, Affiliated Hospital of Nantong University, Nantong 226019, China
| | - Hongmei Yong
- Department of Oncology, Huai'an Hospital Affiliated of Xuzhou Medical College and Huai'an Second People's Hospital, Huai'an 223001, China
| | - Wei Wang
- Department of Pathology, Affiliated Hospital of Nantong University, Nantong 226019, China
| | - Yan Zhou
- Department of Oncology, AoYoung Hospital, Zhangjiagang, Jiangsu 215617, China
| | - Bing Wang
- Department of Oncology, AoYoung Hospital, Zhangjiagang, Jiangsu 215617, China
| | - Jinbo Wen
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing 210029, China
| | - Zhenning Qiu
- Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing 210029, China
| | - Guipeng Ding
- Department of Pathology, Nanjing Medical University, Nanjing 210029, China
| | - Zhenqing Feng
- Department of Pathology, Nanjing Medical University, Nanjing 210029, China.,Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing 210029, China.,Jiangsu Collaborative Innovation Center for Cancer Personalized Medicine, Nanjing Medical University, Nanjing 210029, China.,Key Laboratory of Cancer Biomarkers, Prevent and Treatment, Cancer Center, Nanjing Medical University, Nanjing 210029, China
| | - Jin Zhu
- Key Laboratory of Antibody Technique of Ministry of Health, Nanjing Medical University, Nanjing 210029, China.,Huadong Medical Institute of Biotechniques, Nanjing 210029, China
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Mittal R, Grati M, Yan D, Liu XZ. Pseudomonas aeruginosa Activates PKC-Alpha to Invade Middle Ear Epithelial Cells. Front Microbiol 2016; 7:255. [PMID: 26973629 PMCID: PMC4777741 DOI: 10.3389/fmicb.2016.00255] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 02/16/2016] [Indexed: 12/31/2022] Open
Abstract
Otitis media (OM) is a group of complex inflammatory disorders affecting the middle ear which can be acute or chronic. Chronic suppurative otitis media (CSOM) is a form of chronic OM characterized by tympanic membrane perforation and discharge. Despite the significant impact of CSOM on human population, it is still an understudied and unexplored research area. CSOM is a leading cause of hearing loss and life-threatening central nervous system complications. Bacterial exposure especially Pseudomonas aeruginosa is the most common cause of CSOM. Our previous studies have demonstrated that P. aeruginosa invades human middle ear epithelial cells (HMEECs). However, molecular mechanisms leading to bacterial invasion of HMEECs are not known. The aim of this study is to characterize the role of PKC pathway in the ability of P. aeruginosa to colonize HMEECs. We observed that otopathogenic P. aeruginosa activates the PKC pathway, specifically phosphorylation of PKC-alpha (PKC-α) in HMEECs. The ability of otopathogenic P. aeruginosa to phosphorylate PKC-α depends on bacterial OprF expression. The activation of PKC-α was associated with actin condensation. Blocking the PKC pathway attenuated the ability of bacteria to invade HMEECs and subsequent actin condensation. This study, for the first time, demonstrates that the host PKC-α pathway is involved in invasion of HMEECs by P. aeruginosa and subsequently to cause OM. Characterizing the role of the host signaling pathway in the pathogenesis of CSOM will provide novel avenues to design effective treatment modalities against the disease.
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Affiliation(s)
- Rahul Mittal
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami Florida, USA
| | - M'hamed Grati
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami Florida, USA
| | - Denise Yan
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami Florida, USA
| | - Xue Z Liu
- Department of Otolaryngology, University of Miami Miller School of Medicine, MiamiFlorida, USA; Department of Biochemistry, University of Miami Miller School of Medicine, MiamiFL, USA; Department of Human Genetics, University of Miami Miller School of Medicine, MiamiFL, USA; Department of Otolaryngology, Xiangya Hospital, Central South UniversityChangsha, China
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