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Dhanisha SS, Guruvayoorappan C. Pathological Implications of Mucin Signaling in Metastasis. Curr Cancer Drug Targets 2023; 23:585-602. [PMID: 36941808 DOI: 10.2174/1568009623666230320121332] [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: 06/10/2022] [Revised: 01/11/2023] [Accepted: 01/25/2023] [Indexed: 03/23/2023]
Abstract
The dynamic mucosal layer provides a selective protective barrier for the epithelial cells lining the body cavities. Diverse human malignancies exploit their intrinsic role to protect and repair epithelia for promoting growth and survival. Aberrant expression of mucin has been known to be associated with poor prognosis of many cancers. However, the emergence of new paradigms in the study of metastasis recognizes the involvement of MUC1, MUC4, MUC5AC, MUC5B, and MUC16 during metastasis initiation and progression. Hence mucins can be used as an attractive target in future diagnostic and therapeutic strategies. In this review, we discuss in detail about mucin family and its domains and the role of different mucins in regulating cancer progression and metastasis. In addition, we briefly discuss insights into mucins as a therapeutic agent.
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Affiliation(s)
| | - Chandrasekharan Guruvayoorappan
- Laboratory of Immunopharmacology and Experimental Therapeutics, Division of Cancer Research, Regional Cancer Centre, Medical College Campus, University of Kerala, Thiruvananthapuram, Kerala, 695011, India
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2
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Liberelle M, Jonckheere N, Melnyk P, Van Seuningen I, Lebègue N. EGF-Containing Membrane-Bound Mucins: A Hidden ErbB2 Targeting Pathway? J Med Chem 2020; 63:5074-5088. [PMID: 32027502 DOI: 10.1021/acs.jmedchem.9b02001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Membrane-bound mucins belong to a heterogeneous family of large O-glycoproteins involved in numerous cancers and inflammatory diseases of the epithelium. Some of them are also involved in protein-protein interactions, with receptor tyrosine kinase ErbB2, and fundamental and clinical data showed that these complexes have a detrimental impact on cancer outcome, thus raising interest in therapeutic targeting. This paper aims to demonstrate that MUC3, MUC4, MUC12, MUC13, and MUC17 have a common evolutionary origin and share a common structural organization with EGF-like and SEA domains. Theoretical structure-function relationship analysis of the conserved domains indicated that the studied membrane-bound mucins share common biological properties along with potential specific functions. Finally, the potential druggability of these complexes is discussed, revealing ErbB2-related pathways of cell signaling to be targeted.
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Affiliation(s)
- Maxime Liberelle
- Univ. Lille, Inserm CHU Lille, UMR-S1172-JPArc-Centre de Recherche Jean-Pierre Aubert Neurosciences et Cancer, F-59000 Lille, France.,Univ. Lille, Inserm, CHU Lille, UMR-S 1172-LiNC-Lille Neuroscience & Cognition, F-59000 Lille, France
| | - Nicolas Jonckheere
- Univ. Lille, Inserm CHU Lille, UMR-S1172-JPArc-Centre de Recherche Jean-Pierre Aubert Neurosciences et Cancer, F-59000 Lille, France.,Univ. Lille, CNRS, Inserm, CHU Lille, UMR9020-UMR-S 1277-Canther-Cancer Heterogeneity, Plasticity and Resistance to Therapies, F-59000 Lille, France
| | - Patricia Melnyk
- Univ. Lille, Inserm CHU Lille, UMR-S1172-JPArc-Centre de Recherche Jean-Pierre Aubert Neurosciences et Cancer, F-59000 Lille, France.,Univ. Lille, Inserm, CHU Lille, UMR-S 1172-LiNC-Lille Neuroscience & Cognition, F-59000 Lille, France
| | - Isabelle Van Seuningen
- Univ. Lille, Inserm CHU Lille, UMR-S1172-JPArc-Centre de Recherche Jean-Pierre Aubert Neurosciences et Cancer, F-59000 Lille, France.,Univ. Lille, CNRS, Inserm, CHU Lille, UMR9020-UMR-S 1277-Canther-Cancer Heterogeneity, Plasticity and Resistance to Therapies, F-59000 Lille, France
| | - Nicolas Lebègue
- Univ. Lille, Inserm CHU Lille, UMR-S1172-JPArc-Centre de Recherche Jean-Pierre Aubert Neurosciences et Cancer, F-59000 Lille, France.,Univ. Lille, Inserm, CHU Lille, UMR-S 1172-LiNC-Lille Neuroscience & Cognition, F-59000 Lille, France
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3
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Sawant PR, Spadigam A, Dhupar A, Syed S, Carvalho K. Assessing the prognostic significance of MUC4β in mucoepidermoid carcinoma of the salivary glands: An immunohistochemical study. Heliyon 2019; 5:e02753. [PMID: 31844699 PMCID: PMC6895766 DOI: 10.1016/j.heliyon.2019.e02753] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 08/05/2019] [Accepted: 10/25/2019] [Indexed: 12/12/2022] Open
Abstract
Objectives – Routine histopathological grading for salivary gland mucoepidermoid carcinoma (MEC) have failed to prognosticate these tumors, resulting in poor post-surgical outcomes. In developing countries, the lack of technologically advanced infrastructure curtails, efficient treatment modalities. This study aimed at determining if MUC4β can characterize salivary gland MEC and serve as a practical and inexpensive method to prognosticate salivary gland MEC. Materials and methods – Fifteen cases of archived paraffin embedded tissue blocks of mucoepidermoid carcinomas were reassessed for histopathological grading using Healey's system, modified by Batsakis and Luna and immunohistochemically evaluated for expression of MUC4β. Statistical analysis (Kappa statistics and Spearman's rho correlation coefficient) was performed to assess inter-observer reproducibility and to correlate the expression of MUC4β with the histopathological grade of the tumor. Results MUC4β expression is related to tumor differentiation in an inverse relationship. Two cases of high grade MEC were the exception to this rule. Conclusion Our study revealed that MUC4β alone cannot serve as a reliable prognostic marker due to its divergent tumor suppressor and oncogenic pathway. The role of MUC4β needs further evaluation and research so as to potentiate therapeutics depending upon its context dependent function, as a cancer marker or an oncogenic factor.
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Affiliation(s)
- Poonam R Sawant
- Department of Oral & Maxillofacial Pathology, Goa Dental College & Hospital, Bambolim, Goa, 403202, India
| | - Anita Spadigam
- Department of Oral & Maxillofacial Pathology, Goa Dental College & Hospital, Bambolim, Goa, 403202, India
| | - Anita Dhupar
- Department of Oral & Maxillofacial Pathology, Goa Dental College & Hospital, Bambolim, Goa, 403202, India
| | - Shaheen Syed
- Department of Oral & Maxillofacial Pathology, Goa Dental College & Hospital, Bambolim, Goa, 403202, India
| | - Karla Carvalho
- Department of Oral & Maxillofacial Pathology, Goa Dental College & Hospital, Bambolim, Goa, 403202, India
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Zhu Y, Zhang JJ, Peng YP, Liu X, Xie KL, Tang J, Jiang KR, Gao WT, Tian L, Zhang K, Xu ZK, Miao Y. NIDO, AMOP and vWD domains of MUC4 play synergic role in MUC4 mediated signaling. Oncotarget 2018; 8:10385-10399. [PMID: 28060749 PMCID: PMC5354666 DOI: 10.18632/oncotarget.14420] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 12/13/2016] [Indexed: 12/16/2022] Open
Abstract
MUC4 mucin is well known as an important potential target to overcome pancreatic cancer. Three unique domains (NIDO, AMOP, and vWD) with unclear roles only present in MUC4 but are not found in other membrane-bound mucins. Our previous studies first reported that its splice variant, MUC4/Y can be a model of MUC4 (MUC4 gene fragment is more than 30KB, too huge to clone and eukaryotic express) in pancreatic cancer. More importantly, based on MUC4/Y with the appropriate length of gene sequence, it is easy to construct the unique domain-lacking models of MUC4/Y (MUC4) for research. The present study focuses on investigation of the respective role of the unique NIDO, AMOP, and vWD domain or their synergistic effect on MUC4(MUC4/Y)-mediated functions and mechanisms by series of in vitro assays, sequence-based transcriptome analysis, validation of qRT-PCR & Western blot, and systematic comparative analysis. Our results demonstrate: 1) NIDO, AMOP, and vWD domain or their synergy play significant roles on MUC4/Y-mediated malignant function of pancreatic cancer, downstream of molecule mechanisms, particularly MUC4/Y-triggered malignancy-related positive feedback loops, respectively. 2) The synergistic roles of three unique domains on MUC4/Y-mediated functions and mechanisms are more prominent than the respective domain because the synergy of three domain plays the more remarkable effects on MUC4/Y-mediated signaling hub. Thus, to improve reversed effects of domain-lacking and break the synergism of domains will contribute to block MUC4/Y(MUC4) triggering various oncogenic signaling pathways.
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Affiliation(s)
- Yi Zhu
- Pancreas Institute of Nanjing Medical University, Nanjing, People's Republic of China.,Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China.,Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China
| | - Jing-Jing Zhang
- Pancreas Institute of Nanjing Medical University, Nanjing, People's Republic of China.,Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China.,Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China
| | - Yun-Peng Peng
- Pancreas Institute of Nanjing Medical University, Nanjing, People's Republic of China.,Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China.,Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China
| | - Xian Liu
- Pancreas Institute of Nanjing Medical University, Nanjing, People's Republic of China.,Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China.,Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China
| | - Kun-Ling Xie
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China.,Department of General Surgery, The People's Hospital of Bozhou, Bozhou, Anhui, People's Republic of China
| | - Jie Tang
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China.,Department of Pediatric Surgery, Nanjing Children's Hospital Affiliated to Nanjing Medical University, Nanjing, People's Republic of China
| | - Kui-Rong Jiang
- Pancreas Institute of Nanjing Medical University, Nanjing, People's Republic of China.,Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China.,Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China
| | - Wen-Tao Gao
- Pancreas Institute of Nanjing Medical University, Nanjing, People's Republic of China.,Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China.,Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China
| | - Lei Tian
- Pancreas Institute of Nanjing Medical University, Nanjing, People's Republic of China.,Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China.,Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China
| | - Kai Zhang
- Pancreas Institute of Nanjing Medical University, Nanjing, People's Republic of China.,Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China.,Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China
| | - Ze-Kuan Xu
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China
| | - Yi Miao
- Pancreas Institute of Nanjing Medical University, Nanjing, People's Republic of China.,Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China.,Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China
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5
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Cell membrane-anchored MUC4 promotes tumorigenicity in epithelial carcinomas. Oncotarget 2017; 8:14147-14157. [PMID: 27829225 PMCID: PMC5355169 DOI: 10.18632/oncotarget.13122] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2016] [Accepted: 10/26/2016] [Indexed: 12/17/2022] Open
Abstract
The cell surface membrane-bound mucin protein MUC4 promotes tumorigenicity, aggressive behavior, and poor outcomes in various types of epithelial carcinomas, including pancreatic, breast, colon, ovarian, and prostate cancer. This review summarizes the theories and findings regarding MUC4 function, and its role in epithelial carcinogenesis. Based on these insights, we developed an outline of the processes and mechanisms by which MUC4 critically supports the propagation and survival of cancer cells in various epithelial organs. MUC4 may therefore be a useful prognostic and diagnostic tool that improves our ability to eradicate various forms of cancer.
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6
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Anderson AM, Ragan MA. Palmitoylation: a protein S-acylation with implications for breast cancer. NPJ Breast Cancer 2016; 2:16028. [PMID: 28721385 PMCID: PMC5515344 DOI: 10.1038/npjbcancer.2016.28] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 07/25/2016] [Accepted: 07/27/2016] [Indexed: 12/19/2022] Open
Abstract
Protein S-acylation is a reversible post-translational lipid modification that involves linkage of a fatty acid chain predominantly to a cysteine amino acid via a thioester bond. The fatty acid molecule is primarily palmitate, thus the term 'palmitoylation' is more commonly used. Palmitoylation has been found to modulate all stages of protein function including maturational processing, trafficking, membrane anchoring, signaling range and efficacy, and degradation. In breast cancer, palmitoylation has been shown to control the function of commonly dysregulated genes including estrogen receptors, the epidermal growth factor (EGF) family of receptors, and cancer stem cell markers. Importantly, palmitoylation is a critical factor controlling the formation of complexes at the plasma membrane involving tetraspanins, integrins, and gene products that are key to cell-cell communication. During metastasis, cancer cells enhance their metastatic capacity by interacting with stroma and immune cells. Although aberrant palmitoylation could contribute to tumor initiation and growth, its potential role in these cell-cell interactions is of particular interest, as it may provide mechanistic insight into metastasis, including cancer cell-driven immune modulation. Compelling evidence for a role for aberrant palmitoylation in breast cancer remains to be established. To this end, in this review we summarize emerging evidence and highlight pertinent knowledge gaps, suggesting directions for future research.
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Affiliation(s)
- Alison M Anderson
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
| | - Mark A Ragan
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
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7
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Asić K. Dominant mechanisms of primary resistance differ from dominant mechanisms of secondary resistance to targeted therapies. Crit Rev Oncol Hematol 2016; 97:178-96. [DOI: 10.1016/j.critrevonc.2015.08.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 06/18/2015] [Accepted: 08/04/2015] [Indexed: 02/07/2023] Open
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8
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Transmembrane Mucin Expression and Function in Embryo Implantation and Placentation. ADVANCES IN ANATOMY, EMBRYOLOGY, AND CELL BIOLOGY 2015; 216:51-68. [PMID: 26450494 DOI: 10.1007/978-3-319-15856-3_4] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Transmembrane mucins (TMs) are extremely large, complex glycoproteins that line the apical surfaces of simple epithelia including those of the female reproductive tract. TMs provide a physical barrier consistent with their role as part of the innate immune system. This barrier function must be overcome in the context of embryo implantation to permit blastocyst attachment. Three major TMs have been identified in uterine epithelia of multiple species: MUC1, MUC4, and MUC16. MUC1 has been found in all species studied to date, whereas expression of MUC4 and MUC16 have been less well studied and may be species specific. The strategies for removing mucins to permit embryo attachment also vary in a species-specific way and include both hormonal suppression of TM gene expression and membrane clearance via cell surface proteases. Studies emerging from the cancer literature indicate that TMs can modulate a surprisingly wide variety of signal transduction processes. Furthermore, various cell surface proteins have been identified that bind either the oligosaccharide or protein motifs of TMs suggesting that these molecules may support cell attachment in some contexts, including trophoblast interactions with cells of the immune system. The intimate association of TMs at sites of embryo-maternal interaction and the varied functions these complex molecules can play make them key players in embryo implantation and placentation processes.
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Sawma P, Roth L, Blanchard C, Bagnard D, Crémel G, Bouveret E, Duneau JP, Sturgis JN, Hubert P. Evidence for new homotypic and heterotypic interactions between transmembrane helices of proteins involved in receptor tyrosine kinase and neuropilin signaling. J Mol Biol 2014; 426:4099-4111. [PMID: 25315821 DOI: 10.1016/j.jmb.2014.10.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 09/26/2014] [Accepted: 10/08/2014] [Indexed: 12/31/2022]
Abstract
Signaling in eukaryotic cells frequently relies on dynamic interactions of single-pass membrane receptors involving their transmembrane (TM) domains. To search for new such interactions, we have developed a bacterial two-hybrid system to screen for both homotypic and heterotypic interactions between TM helices. We have explored the dimerization of TM domains from 16 proteins involved in both receptor tyrosine kinase and neuropilin signaling. This study has revealed several new interactions. We found that the TM domain of Mucin-4, a putative intramembrane ligand for erbB2, dimerizes not only with erbB2 but also with all four members of the erbB family. In the Neuropilin/Plexin family of receptors, we showed that the TM domains of Neuropilins 1 and 2 dimerize with themselves and also with Plexin-A1, Plexin-B1, and L1CAM, but we were unable to observe interactions with several other TM domains notably those of members of the VEGF receptor family. The potentially important Neuropilin 1/Plexin-A1 interaction was confirmed using a surface plasmon resonance assay. This work shows that TM domain interactions can be highly specific. Exploring further the propensities of TM helix-helix association in cell membrane should have important practical implications related to our understanding of the structure-function of bitopic proteins' assembly and subsequent function, especially in the regulation of signal transduction.
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Affiliation(s)
- Paul Sawma
- Laboratoire d'Ingénierie des Systèmes Macromoléculaires, UMR 7255, Centre National de la Recherche Scientifique and Aix-Marseille University, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
| | - Lise Roth
- INSERM U 1109 and University of Strasbourg, 3 Avenue Molière, 67200 Strasbourg, France
| | - Cécile Blanchard
- Laboratoire d'Ingénierie des Systèmes Macromoléculaires, UMR 7255, Centre National de la Recherche Scientifique and Aix-Marseille University, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
| | - Dominique Bagnard
- INSERM U 1109 and University of Strasbourg, 3 Avenue Molière, 67200 Strasbourg, France
| | - Gérard Crémel
- INSERM U 1109 and University of Strasbourg, 3 Avenue Molière, 67200 Strasbourg, France
| | - Emmanuelle Bouveret
- Laboratoire d'Ingénierie des Systèmes Macromoléculaires, UMR 7255, Centre National de la Recherche Scientifique and Aix-Marseille University, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
| | - Jean-Pierre Duneau
- Laboratoire d'Ingénierie des Systèmes Macromoléculaires, UMR 7255, Centre National de la Recherche Scientifique and Aix-Marseille University, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
| | - James N Sturgis
- Laboratoire d'Ingénierie des Systèmes Macromoléculaires, UMR 7255, Centre National de la Recherche Scientifique and Aix-Marseille University, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
| | - Pierre Hubert
- Laboratoire d'Ingénierie des Systèmes Macromoléculaires, UMR 7255, Centre National de la Recherche Scientifique and Aix-Marseille University, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France.
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Han M, Deng HY, Jiang R. Effect of Trastuzumab on Notch-1 Signaling Pathway in Breast Cancer SK-BR3 Cells. Chin J Cancer Res 2013; 24:213-9. [PMID: 23358465 DOI: 10.1007/s11670-012-0213-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2011] [Accepted: 11/20/2011] [Indexed: 02/06/2023] Open
Abstract
OBJECTIVE To investigate the effects and mechanisms of trastuzumab on Notch-1 pathway in breast cancer cells, recognizing the significance of Notch-1 signaling pathway in trastuzumab resistance. METHODS Immunocytochemistry staining and Western blotting were employed to justify the expression of Notch-1 protein in HER2-overexpressing SK-BR3 cells and HER2-non-overexpressing breast cancer MDA-MB-231 cells. Western blotting and reverse transcription PCR (RT-PCR) were used to detect the activated Notch-1 and Notch-1 target gene HES-1 mRNA expression after SK-BR3 cells were treated with trastuzumab. Double immunofluorescence staining and co-immunoprecipitation were used to analyze the relationship of Notch-1 and HER2 proteins. RESULTS The level of Notch-1 nuclear localization and activated Notch-1 proteins in HER2-overexpressing cells were significantly lower than in HER2-non-overexpressing cells (P<0.01), and the expressions of activated Notch-1 and HES-1 mRNA were obviously increased after trastuzumab treatment (P<0.05), but HER2 expression did not change significantly for trastuzumab treating (P>0.05). Moreover, Notch-1 was discovered to co-localize and interact with HER2 in SK-BR3 cells. CONCLUSION Overexpression of HER2 decreased Notch-1 activity by the formation of a HER2-Notch1 complex, and trastuzumab can restore the activity of Notch-1 signaling pathway, which could be associated with cell resistance to trastuzumab.
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Affiliation(s)
- Ming Han
- Department of Pathophysiology, Laboratory for Stem Cell and Tissue Engineering, Chongqing Medical University, Chongqing 400016, China
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11
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Algamas-Dimantov A, Yehuda-Shnaidman E, Peri I, Schwartz B. Epigenetic control of HNF-4α in colon carcinoma cells affects MUC4 expression and malignancy. Cell Oncol (Dordr) 2013; 36:155-67. [PMID: 23307400 DOI: 10.1007/s13402-012-0123-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/28/2012] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND We previously found that enhanced expression of hepatocyte nuclear factor 4α (HNF-4α) is associated with hyper-proliferation of colon carcinoma cells. Here, the effect of histone deacetylase (HDAC) inhibitors on proliferation and the expression of HNF-4α and its downstream target genes were assessed in HM7, LS174T, HT29 and Caco-2 colon carcinoma cell lines. RESULTS HNF-4α expression was found to vary in the different colon carcinoma cell lines tested, being highest in HM7. Additionally, a direct correlation with proliferation was observed. In HM7 cells, the weak HDAC inhibitor butyrate significantly inhibited the transcription of HNF-4α, its downstream target gene MUC4, and genes associated with proliferation, including the proliferating cell nuclear antigen gene PCNA. siRNA-mediated silencing of HNF-4α exerted an effect similar to butyrate on HM7 cell proliferation. The stronger HDAC inhibitor trichostatin A (TSA) exerted an effect similar to that of siRNA-mediated HNF-4α silencing and, concomitantly, inhibited the expression of the transcription factor gene SP1. Also, siRNA-mediated silencing of HDAC3 and HDAC4 reduced HNF-4α expression. Chromatin immunoprecipitation (ChIP) assays revealed that TSA induces hyperacetylation of histones H3 and H4 and, concomitantly, inhibits SP1 binding to the HNF-4α promoter. Subsequent electromobility shift assays supported these latter findings. CONCLUSIONS HNF-4α transcriptional expression and activity are tightly controlled by epigenetic mechanisms. HDAC inhibitor targeting of HNF-4α may serve as an effective treatment for advanced colon carcinomas, since downstream cancer-associated target genes such as MUC4 are significantly down-regulated by this treatment.
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Affiliation(s)
- Anna Algamas-Dimantov
- Institute of Biochemistry, Food Science and Nutrition, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot, 76100, Israel
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12
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Zhang H, Pelech S. Using protein microarrays to study phosphorylation-mediated signal transduction. Semin Cell Dev Biol 2012; 23:872-82. [DOI: 10.1016/j.semcdb.2012.05.009] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Revised: 05/30/2012] [Accepted: 05/30/2012] [Indexed: 01/18/2023]
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13
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Orphanos G, Kountourakis P. Targeting the HER2 Receptor in Metastatic Breast Cancer. Hematol Oncol Stem Cell Ther 2012; 5:127-37. [DOI: 10.5144/1658-3876.2012.127] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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14
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Basile A, Zeppa R, Pasquino N, Arra C, Ammirante M, Festa M, Barbieri A, Giudice A, Pascale M, Turco MC, Rosati A. Exposure to 50 Hz electromagnetic field raises the levels of the anti-apoptotic protein BAG3 in melanoma cells. J Cell Physiol 2011; 226:2901-7. [DOI: 10.1002/jcp.22641] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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15
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16
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Distribution of resting and ligand-bound ErbB1 and ErbB2 receptor tyrosine kinases in living cells using number and brightness analysis. Proc Natl Acad Sci U S A 2010; 107:16524-9. [PMID: 20813958 DOI: 10.1073/pnas.1002642107] [Citation(s) in RCA: 123] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Ligand-driven dimerizations of ErbB receptor subunits fulfill a fundamental role in their activation. We have used the number and brightness analysis technique to investigate the existence of preformed ligand-independent dimers and clusters and to characterize the initial steps in the activation of ErbB1 and ErbB2. In cells expressing 50,000-200,000 receptors, ErbB1 was monomeric in the absence of ligand stimulation, whereas in CHO cells with receptor levels >500,000 as much as 30% of ErbB1 was present as preformed dimers. EGF induced the formation of ErbB1 dimers as well as larger clusters (up to pentamers) that colocalized with clathrin-coated pits. The distribution of unstimulated ErbB2 in cells expressing 3·10(5)-10(6) receptors was fundamentally different, in that this receptor was present in preformed homoassociated aggregates containing 5-10 molecules. These constitutive ErbB2 homoclusters colocalized with caveolae, increased in size at subphysiological temperatures, but decreased in size upon EGF stimulation. We conclude that these ErbB2 clusters are promoted primarily by membrane-mediated interactions and are dispersed upon ligand stimulation.
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