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Banga AR, Odiase P, Rachakonda K, Garg AP, Adunyah SE, Rachakonda G. Application of C-Terminal Clostridium Perfringens Enterotoxin in Treatment of Brain Metastasis from Breast Cancer. Cancers (Basel) 2022; 14:cancers14174309. [PMID: 36077843 PMCID: PMC9454751 DOI: 10.3390/cancers14174309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 08/25/2022] [Accepted: 08/26/2022] [Indexed: 11/16/2022] Open
Abstract
Simple Summary Brain metastasis occurs in primary cancers, such as breast cancer, and is correlated with mortality. There are limited options available for treatment, but Clostridium perfringens Enterotoxin (CPE) and its interaction with Claudin-4, a possible diagnostic biomarker for breast cancer, can provide a molecular pathway basis for the development of treatment options for metastatic brain cancer. Analysis of the literature reveals that Claudin-4 plays an important role as a receptor for CPE, allowing for the disruption of cell membrane permeability, an influx of calcium ions, and subsequent cell death. The negligible presence of Claudin-4 in normal brain cancer cells and the high abundance of Claudin-4 in breast cancer cells metastasized to the brain, allow for the targeted binding of CPE to tumor cells in the brain. We show that the C-terminal of CPE conjugated to nanoparticles that cross the blood–brain barrier could serve as a drug delivery tool to treat metastatic cells in the brain. Abstract Claudin-4 is part of the Claudin family of transmembrane tight junction (TJ) proteins found in almost all tissues and, together with adherens junctions and desmosomes, forms epithelial and endothelial junctional complexes. Although the distribution of Claudin-4 occurs in many cell types, the level of expression is cell-specific. Claudin proteins regulate cell proliferation and differentiation by binding cell-signaling ligands, and its expression is upregulated in several cancers. As a result, alterations in Claudin expression patterns or distribution are vital in the pathology of cancer. Profiling the genetic expression of Claudin-4 showed that Claudin-4 is also a receptor for the clostridium perfringens enterotoxin (CPE) and that Claudin-4 has a high sequence similarity with CPE’s high-affinity receptor. CPE is cytolytic due to its ability to form pores in cellular membranes, and CPE treatment in breast cancer cells have shown promising results due to the high expression of Claudin-4. The C-terminal fragment of CPE (c-CPE) provides a less toxic alternative for drug delivery into breast cancer cells, particularly metastatic tumors in the brain, especially as Claudin-4 expression in the central nervous system (CNS) is low. Therefore, c-CPE provides a unique avenue for the treatment of breast–brain metastatic tumors.
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Affiliation(s)
- Amita R. Banga
- Department of Biotechnology, School of Biological Engineering & Sciences, Shobhit Institute of Engineering & Technology, Meerut 250110, India
- Department of Microbiology, Immunology and Physiology, Meharry Medical College, Nashville, TN 37208, USA
| | - Peace Odiase
- Department of Microbiology, Immunology and Physiology, Meharry Medical College, Nashville, TN 37208, USA
| | - Kartik Rachakonda
- Undergraduate Studies, School of Arts and Sciences, University of South Florida, Tampa, FL 33620, USA
| | - Amar P. Garg
- Department of Biotechnology, School of Biological Engineering & Sciences, Shobhit Institute of Engineering & Technology, Meerut 250110, India
| | - Samuel E. Adunyah
- Department of Biochemistry, Cancer Biology, Neuroscience & Pharmacology, Meharry Medical College, Nashville, TN 37208, USA
| | - Girish Rachakonda
- Department of Microbiology, Immunology and Physiology, Meharry Medical College, Nashville, TN 37208, USA
- Correspondence: ; Tel.: +615-775-7478
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EGF-Dependent Activation of ELK1 Contributes to the Induction of CLDND1 Expression Involved in Tight Junction Formation. Biomedicines 2022; 10:biomedicines10081792. [PMID: 35892692 PMCID: PMC9329870 DOI: 10.3390/biomedicines10081792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 07/14/2022] [Accepted: 07/22/2022] [Indexed: 11/23/2022] Open
Abstract
Claudin proteins are intercellular adhesion molecules. Increased claudin domain-containing 1 (CLDND1) expression is associated with the malignant transformation of estrogen receptor-negative breast cancer cells with low sensitivity to hormone therapy. Abnormal CLDND1 expression is also implicated in vascular diseases. Previously, we investigated the regulatory mechanism underlying CLDND1 expression and identified a strong enhancer region near the promoter. In silico analysis of the sequence showed high homology to the ETS domain-containing protein-1 (ELK1)-binding sequence which is involved in cell growth, differentiation, angiogenesis, and cancer. Transcriptional ELK1 activation is associated with the mitogen-activated protein kinase (MAPK) signaling cascade originating from the epidermal growth factor receptor (EGFR). Here, we evaluated the effect of gefitinib, an EGFR tyrosine kinase inhibitor, on the suppression of CLDND1 expression using ELK1 overexpression in luciferase reporter and chromatin immunoprecipitation assays. ELK1 was found to be an activator of the enhancer region, and its transient expression increased that of CLDND1 at the mRNA and protein levels. CLDND1 expression was increased following EGF-induced ELK1 phosphorylation. Furthermore, this increase in CLDND1 was significantly suppressed by gefitinib. Therefore, EGF-dependent activation of ELK1 contributes to the induction of CLDND1 expression. These findings open avenues for the development of new anticancer agents targeting CLDND1.
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Qin Z, Wang W, Ali MA, Wang Y, Zhang Y, Zhang M, Zhou G, Yang JD, Zeng C. Transcriptome-wide m 6A profiling reveals mRNA post-transcriptional modification of boar sperm during cryopreservation. BMC Genomics 2021; 22:588. [PMID: 34344298 PMCID: PMC8335898 DOI: 10.1186/s12864-021-07904-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 07/21/2021] [Indexed: 12/12/2022] Open
Abstract
Background Cryopreservation induces transcriptomic and epigenetic modifications that strongly impairs sperm quality and function, and thus decrease reproductive performance. N6-methyladenosine (m6A) RNA methylation varies in response to stress and has been implicated in multiple important biological processes, including post-transcriptional fate of mRNA, metabolism, and apoptosis. This study aimed to explore whether cryopreservation induces m6A modification of mRNAs associated with sperm energy metabolism, cryoinjuries, and freezability. Results The mRNA and protein expression of m6A modification enzymes were significantly dysregulated in sperm after cryopreservation. Furthermore, m6A peaks were mainly enriched in coding regions and near stop codons with classical RRACH motifs. The mRNAs containing highly methylated m6A peaks (fts vs. fs) were significantly associated with metabolism and gene expression, while the genes with less methylated m6A peaks were primarily involved in processes regulating RNA metabolism and transcription. Furthermore, the joint analysis of DMMGs and differentially expressed genes indicated that both of these play a vital role in sperm energy metabolism and apoptosis. Conclusions Our study is the first to reveal the dynamic m6A modification of mRNAs in boar sperm during cryopreservation. These epigenetic modifications may affect mRNA expression and are closely related to sperm motility, apoptosis, and metabolism, which will provide novel insights into understanding of the cryoinjuries or freezability of boar sperm during cryopreservation. Supplementary Information The online version contains supplementary material available at 10.1186/s12864-021-07904-8.
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Affiliation(s)
- Ziyue Qin
- College of Animal Sciences and Technology, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China.,Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, 611130, Chengdu, Sichuan Province, China
| | - Wencan Wang
- College of Animal Sciences and Technology, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China.,Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, 611130, Chengdu, Sichuan Province, China
| | - Malik Ahsan Ali
- College of Animal Sciences and Technology, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China.,Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, 611130, Chengdu, Sichuan Province, China.,Department of Theriogenology, Riphah College of Veterinary Sciences, 54000, Lahore, Pakistan
| | - Yihan Wang
- College of Animal Sciences and Technology, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China.,Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, 611130, Chengdu, Sichuan Province, China
| | - Yan Zhang
- College of Animal Sciences and Technology, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China.,Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, 611130, Chengdu, Sichuan Province, China
| | - Ming Zhang
- College of Animal Sciences and Technology, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China.,Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, 611130, Chengdu, Sichuan Province, China
| | - Guangbin Zhou
- College of Animal Sciences and Technology, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China.,Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, 611130, Chengdu, Sichuan Province, China
| | - Jian-Dong Yang
- College of Animal Sciences and Technology, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China.,Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, 611130, Chengdu, Sichuan Province, China
| | - Changjun Zeng
- College of Animal Sciences and Technology, Sichuan Agricultural University, 611130, Chengdu, Sichuan, China. .,Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, 611130, Chengdu, Sichuan Province, China.
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Di Paolo A, Eastman G, Mesquita-Ribeiro R, Farias J, Macklin A, Kislinger T, Colburn N, Munroe D, Sotelo Sosa JR, Dajas-Bailador F, Sotelo-Silveira JR. PDCD4 regulates axonal growth by translational repression of neurite growth-related genes and is modulated during nerve injury responses. RNA (NEW YORK, N.Y.) 2020; 26:1637-1653. [PMID: 32747606 PMCID: PMC7566564 DOI: 10.1261/rna.075424.120] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Accepted: 07/20/2020] [Indexed: 05/07/2023]
Abstract
Programmed cell death 4 (PDCD4) protein is a tumor suppressor that inhibits translation through the mTOR-dependent initiation factor EIF4A, but its functional role and mRNA targets in neurons remain largely unknown. Our work identified that PDCD4 is highly expressed in axons and dendrites of CNS and PNS neurons. Using loss- and gain-of-function experiments in cortical and dorsal root ganglia primary neurons, we demonstrated the capacity of PDCD4 to negatively control axonal growth. To explore PDCD4 transcriptome and translatome targets, we used Ribo-seq and uncovered a list of potential targets with known functions as axon/neurite outgrowth regulators. In addition, we observed that PDCD4 can be locally synthesized in adult axons in vivo, and its levels decrease at the site of peripheral nerve injury and before nerve regeneration. Overall, our findings demonstrate that PDCD4 can act as a new regulator of axonal growth via the selective control of translation, providing a target mechanism for axon regeneration and neuronal plasticity processes in neurons.
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Affiliation(s)
- Andrés Di Paolo
- Departamento de Proteínas y Ácidos Nucleicos, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo 11600, Uruguay
| | - Guillermo Eastman
- Departamento de Genómica, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo 11600, Uruguay
| | | | - Joaquina Farias
- Departamento de Genómica, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo 11600, Uruguay
| | - Andrew Macklin
- Princess Margaret Cancer Centre, University Health Network, Toronto M5G 1L7, Canada
| | - Thomas Kislinger
- Princess Margaret Cancer Centre, University Health Network, Toronto M5G 1L7, Canada
- University of Toronto, Department of Medical Biophysics, Toronto M5S 1A1, Canada
| | - Nancy Colburn
- Former Chief of Laboratory of Cancer Prevention at the National Cancer Institute-NIH at Frederick, Maryland 21702, USA
| | - David Munroe
- Former Laboratory of Molecular Technologies, LEIDOS at Frederick National Laboratory for Cancer Research, Frederick, Maryland 21702, USA
| | - José R Sotelo Sosa
- Departamento de Proteínas y Ácidos Nucleicos, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo 11600, Uruguay
| | | | - José R Sotelo-Silveira
- Departamento de Genómica, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo 11600, Uruguay
- Departamento de Biología Celular y Molecular, Facultad de Ciencias UdelaR, Montevideo 11400, Uruguay
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Abstract
In this issue of Cell Chemical Biology, Ko et al. (2019) describe a form of regulated necrosis that depends on active, retrograde transport of vesicles from the plasma membrane to the Golgi. The cell death is distinct from defined modalities including apoptosis, and most tumor lines show enhanced sensitivity to it.
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Affiliation(s)
- Douglas R Green
- Department of Immunology, St. Jude Children's Research Institute, Memphis, TN 38105, USA.
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BAGHERI M, FAZLI M, SAEEDNIA S, GHOLAMI KHARANAGH M, AHMADIANKIA N. Sulforaphane Modulates Cell Migration and Expression of β-Catenin and Epithelial Mesenchymal Transition Markers in Breast Cancer Cells. IRANIAN JOURNAL OF PUBLIC HEALTH 2020; 49:77-85. [PMID: 32309226 PMCID: PMC7152640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
BACKGROUND We aimed to assess the effect of sulforaphane (SFN) on breast cancer cell migration and also its effect on the expression of epithelial mesenchymal transition (EMT) markers and β-catenin. METHODS This study was performed in Shahroud University of Medical Sciences, Shahroud, Iran from 2017-2018. In this experimental study, MDA-MB-231 cells were treated with different concentrations of SFN (5, 10, 20, 30 and 40 μM) at different time points of 24, 48, and 72 h. The control group was untreated cells. The inhibitory effects of different concentrations of SFN on cell migration at different time points were evaluated using scratch assay. Moreover, apoptosis was assessed by using flow cytometric analysis. The expression of β-catenin and EMT markers of ZEB1, fibronectin, and claudin-1 were determined by real-time PCR. Western blotting analysis of β-catenin was applied to determine its changes after SFN treatment. RESULTS SFN markedly inhibited the migration of cells at concentrations of 10, 20, 30, and 40μM after 24, 48, and 72 h. At relatively, high concentrations (30, 40μM), SFN induced apoptosis. Moreover, SFN reduced the gene expression of ZEB1, fibronectin, and claudin-1 after 72 h. The expression of β-catenin revealed a time-dependent decrease at the concentration of 40 μM SFN. CONCLUSION Downregulation of EMT markers and β-catenin showed accordance with the inhibition of migration. SFN could be a promising drug candidate to reduce metastasis in breast cancer.
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Affiliation(s)
- Mehdi BAGHERI
- Clinical Research Development Unit, Imam Hossein Hospital, Shahroud University of Medical Sciences, Shahroud, Iran
| | - Mozhgan FAZLI
- School of Medicine, Shahroud University of Medical Sciences, Shahroud, Iran
| | - Sara SAEEDNIA
- School of Medicine, Shahroud University of Medical Sciences, Shahroud, Iran
| | - Majid GHOLAMI KHARANAGH
- Student Research Committee, School of Medicine, Shahroud University of Medical Sciences, Shahroud, Iran
| | - Naghmeh AHMADIANKIA
- School of Medicine, Shahroud University of Medical Sciences, Shahroud, Iran,Cancer Prevention Research Center, Shahroud University of Medical Sciences, Shahroud, Iran,Corresponding Author:
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7
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Zeisel MB, Dhawan P, Baumert TF. Tight junction proteins in gastrointestinal and liver disease. Gut 2019; 68:547-561. [PMID: 30297438 PMCID: PMC6453741 DOI: 10.1136/gutjnl-2018-316906] [Citation(s) in RCA: 172] [Impact Index Per Article: 34.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 08/16/2018] [Accepted: 08/19/2018] [Indexed: 12/11/2022]
Abstract
Over the past two decades a growing body of evidence has demonstrated an important role of tight junction (TJ) proteins in the physiology and disease biology of GI and liver disease. On one side, TJ proteins exert their functional role as integral proteins of TJs in forming barriers in the gut and the liver. Furthermore, TJ proteins can also be expressed outside TJs where they play important functional roles in signalling, trafficking and regulation of gene expression. A hallmark of TJ proteins in disease biology is their functional role in epithelial-to-mesenchymal transition. A causative role of TJ proteins has been established in the pathogenesis of colorectal cancer and gastric cancer. Among the best characterised roles of TJ proteins in liver disease biology is their function as cell entry receptors for HCV-one of the most common causes of hepatocellular carcinoma. At the same time TJ proteins are emerging as targets for novel therapeutic approaches for GI and liver disease. Here we review our current knowledge of the role of TJ proteins in the pathogenesis of GI and liver disease biology and discuss their potential as therapeutic targets.
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Affiliation(s)
- Mirjam B. Zeisel
- Inserm U1052, CNRS UMR 5286, Cancer Research Center of Lyon (CRCL), Université de Lyon (UCBL), Lyon, France
- Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France
- Université de Strasbourg, Strasbourg, France
| | - Punita Dhawan
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE
- Buffet Cancer Center, University of Nebraska Medical Center, Omaha, NE
- VA Nebraska-Western Iowa Health Care System, Omaha, NE
| | - Thomas F. Baumert
- Inserm, U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France
- Université de Strasbourg, Strasbourg, France
- Institut Hospitalo-Universitaire, Pôle hépato-digestif, Nouvel Hôpital Civil, Strasbourg, France
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Logullo AF, Pasini FS, Nonogaki S, Rocha RM, Soares FA, Brentani MM. Immunoexpression of claudins 4 and 7 among invasive breast carcinoma subtypes: A large diagnostic study using tissue microarray. Mol Clin Oncol 2018; 9:377-388. [PMID: 30214726 PMCID: PMC6125702 DOI: 10.3892/mco.2018.1685] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 07/24/2018] [Indexed: 11/06/2022] Open
Abstract
Molecular phenotyping and tissue microarray (TMA) studies have identified distinct invasive breast carcinoma subtypes: Luminal A, luminal B, enriched with overexpressed human epidermal growth factor receptor 2 (HER-2) and triple-negative, i.e., negative for HER-2, as well as for estrogen and progesterone receptor (ER and PR, respectively) expression. These subtypes are useful in clinical management, since they bear distinct prognoses and predictive responses to targeted therapy. However, although molecular profiling provides important prognostic indicators, breast cancer risk stratification remains a challenge in triple-negative cases. What is referred to as claudin-low subtype was identified as a triple-negative subset that is associated with more aggressive tumor behavior and worse prognosis. However, the immunohistochemical expression of claudins has not yet been standardized. Our objective was to verify whether the immunoexpression of claudins 4 and 7 (the main claudins specifically expressed in human breast tissue) in TMA is associated with survival and prognosis in luminal A, HER-2 and triple-negative molecular subtypes. In this diagnostic study, we investigated ER/PR receptor status, HER-2, claudin 4 and 7 expression and stem cell CD44/24 profiles, and verified the association with prognosis and survival outcomes in 803 invasive breast carcinoma cases arranged in four TMAs. Among these, 503 (62.6%) were positive for claudin 4 and 369 (46.0%) for claudin 7. Claudin 4 exhibited the lowest expression in luminal A and triple-negative subtypes, and the highest frequency of expression in HER-2-enriched subtypes, whereas claudin 7 staining was not associated with any subtype. The stem cell phenotype was not associated with subgroups or claudins 4 and 7. Claudin immunoexpression profile was not able to distinguish between patients with better or worse prognosis, and it was not correlated to triple-negative cases. Therefore, it may be concluded that the immunoexpression of claudins 4 and 7, individually or within the usual immunohistochemical context (ER, PR and HER-2), does not provide additional prognostic information on breast cancer subtypes.
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Affiliation(s)
- Angela Flávia Logullo
- Pathology Department, Federal University of São Paulo (UNIFESP), São Paulo, SP 04023-062, Brazil
| | - Fatima Solange Pasini
- Radiology and Oncology Department (LIM24), São Paulo University, School of Medicine (FMUSP), São Paulo, SP 01246-903, Brazil
| | - Suely Nonogaki
- Department of Pathology, Adolfo Lutz Institute, São Paulo, SP 01246-000, Brazil
| | | | - Fernando Augusto Soares
- Discipline of Pathology, Odontology School, São Paulo University (FOUSP), São Paulo, SP 05508-000, Brazil
| | - Maria Mitzi Brentani
- Radiology and Oncology Department (LIM24), São Paulo University, School of Medicine (FMUSP), São Paulo, SP 01246-903, Brazil.,Pathology Department, A.C. Camargo Cancer Center, São Paulo, SP 01509-020, Brazil
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Cheng J, Liu C, Liu L, Chen X, Shan J, Shen J, Zhu W, Qian C. MEK1 signaling promotes self-renewal and tumorigenicity of liver cancer stem cells via maintaining SIRT1 protein stabilization. Oncotarget 2018; 7:20597-611. [PMID: 26967560 PMCID: PMC4991478 DOI: 10.18632/oncotarget.7972] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 02/02/2016] [Indexed: 12/13/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is the third leading cause of cancer death. This high mortality has been commonly attributed to the presence of residual cancer stem cells (CSCs). Meanwhile, MEK1 signaling is regarded as a key molecular in HCC maintenance and development. However, nobody has figured out the particular mechanisms that how MEK1 signaling regulates liver CSCs self-renewal. In this study, we show that inhibition or depletion of MEK1 can significantly decrease liver CSCs self-renewal and tumor growth both in vitro and vivo conditions. Furthermore, we demonstrate that MEK1 signaling promotes liver CSCs self-renewal and tumorigenicity by maintaining SIRT1 level. Mechanistically, MEK1 signaling keeps SIRT1 protein stabilization through activating SIRT1 ubiquitination, which inhibits proteasomal degradation. Clinical analysis shows that patients co-expression of MEK1 and SIRT1 are associated with poor survival. Our finding indicates that MEK1-SIRT1 can act as a novel diagnostic biomarker and inhibition of MEK1 may be a viable therapeutic option for targeting liver CSCs treatment.
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Affiliation(s)
- Jiamin Cheng
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Chungang Liu
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Limei Liu
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Xuejiao Chen
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Juanjuan Shan
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Junjie Shen
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Wei Zhu
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Cheng Qian
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
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Ohnishi M, Ochiai H, Matsuoka K, Akagi M, Nakayama Y, Shima A, Uda A, Matsuoka H, Kamishikiryo J, Michihara A, Inoue A. Claudin domain containing 1 contributing to endothelial cell adhesion decreases in presence of cerebellar hemorrhage. J Neurosci Res 2017; 95:2051-2058. [DOI: 10.1002/jnr.24040] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 01/11/2017] [Accepted: 01/30/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Masatoshi Ohnishi
- Department of Pharmacotherapeutics, Faculty of Pharmacy and Pharmaceutical Sciences; Fukuyama University; Higashimura-cho, Fukuyama Hiroshima Japan
| | - Hiroyuki Ochiai
- Department of Pharmacotherapeutics, Faculty of Pharmacy and Pharmaceutical Sciences; Fukuyama University; Higashimura-cho, Fukuyama Hiroshima Japan
| | - Kohei Matsuoka
- Department of Pharmacotherapeutics, Faculty of Pharmacy and Pharmaceutical Sciences; Fukuyama University; Higashimura-cho, Fukuyama Hiroshima Japan
| | - Marina Akagi
- Department of Pharmacotherapeutics, Faculty of Pharmacy and Pharmaceutical Sciences; Fukuyama University; Higashimura-cho, Fukuyama Hiroshima Japan
| | - Yuta Nakayama
- Department of Pharmacotherapeutics, Faculty of Pharmacy and Pharmaceutical Sciences; Fukuyama University; Higashimura-cho, Fukuyama Hiroshima Japan
| | - Akiho Shima
- Department of Genome Function and Pathophysiology, Faculty of Pharmacy and Pharmaceutical Sciences; Fukuyama University; Higashimura-cho, Fukuyama Hiroshima Japan
| | - Arisa Uda
- Department of Genome Function and Pathophysiology, Faculty of Pharmacy and Pharmaceutical Sciences; Fukuyama University; Higashimura-cho, Fukuyama Hiroshima Japan
| | - Hiroshi Matsuoka
- Department of Genome Function and Pathophysiology, Faculty of Pharmacy and Pharmaceutical Sciences; Fukuyama University; Higashimura-cho, Fukuyama Hiroshima Japan
| | - Jun Kamishikiryo
- Department of Biochemistry, Faculty of Pharmacy and Pharmaceutical Sciences; Fukuyama University; Higashimura-cho, Fukuyama Hiroshima Japan
| | - Akihiro Michihara
- Department of Genome Function and Pathophysiology, Faculty of Pharmacy and Pharmaceutical Sciences; Fukuyama University; Higashimura-cho, Fukuyama Hiroshima Japan
| | - Atsuko Inoue
- Department of Pharmacotherapeutics, Faculty of Pharmacy and Pharmaceutical Sciences; Fukuyama University; Higashimura-cho, Fukuyama Hiroshima Japan
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11
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GUO YAXIONG, LIN DONGJING, ZHANG MINGZI, ZHANG XIAOWEI, LI YANRU, YANG RUAN, LU YAN, JIN XIANGSHU, YANG MINLAN, WANG MIAOMIAO, ZHAO SHUAI, QUAN CHENGSHI. CLDN6-induced apoptosis via regulating ASK1-p38/JNK signaling in breast cancer MCF-7 cells. Int J Oncol 2016; 48:2435-44. [DOI: 10.3892/ijo.2016.3469] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Accepted: 03/15/2016] [Indexed: 11/06/2022] Open
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12
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Leech AO, Cruz RGB, Hill ADK, Hopkins AM. Paradigms lost-an emerging role for over-expression of tight junction adhesion proteins in cancer pathogenesis. ANNALS OF TRANSLATIONAL MEDICINE 2015; 3:184. [PMID: 26366401 DOI: 10.3978/j.issn.2305-5839.2015.08.01] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 07/23/2015] [Indexed: 12/31/2022]
Abstract
Tight junctions (TJ) are multi-protein complexes located at the apicalmost tip of the lateral membrane in polarised epithelial and endothelial cells. Their principal function is in mediating intercellular adhesion and polarity. Accordingly, it has long been a paradigm that loss of TJ proteins and consequent deficits in cell-cell adhesion are required for tumour cell dissemination in the early stages of the invasive/metastatic cascade. However it is becoming increasingly apparent that TJ proteins play important roles in not just adhesion but also intracellular signalling events, activation of which can contribute to, or even drive, tumour progression and metastasis. In this review, we shall therefore highlight cases wherein the gain of TJ proteins has been associated with signals promoting tumour progression. We will also discuss the potential of overexpressed TJ proteins to act as therapeutic targets in cancer treatment. The overall purpose of this review is not to disprove the fact that loss of TJ-based adhesion contributes to the progression of several cancers, but rather to introduce the growing body of evidence that gain of TJ proteins may have adhesion-independent consequences for promoting progression in other cancers.
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Affiliation(s)
- Astrid O Leech
- Department of Surgery, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Rodrigo G B Cruz
- Department of Surgery, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Arnold D K Hill
- Department of Surgery, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Ann M Hopkins
- Department of Surgery, Royal College of Surgeons in Ireland, Dublin, Ireland
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