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Li Y, Sun B, Zhao X, Wang X, Zhang D, Gu Q, Liu T. MMP-2 and MMP-13 affect vasculogenic mimicry formation in large cell lung cancer. J Cell Mol Med 2017; 21:3741-3751. [PMID: 28766880 PMCID: PMC5706571 DOI: 10.1111/jcmm.13283] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2016] [Accepted: 05/23/2017] [Indexed: 11/30/2022] Open
Abstract
Matrix metalloproteinases (MMPs) have critical functions in tumour vasculogenic mimicry (VM). This study explored the mechanisms underlying MMP-13 and MMP-2 regulation of tumour VM formation in large cell lung cancer (LCLC). In our study, laminin5 (Ln-5) fragments cleaved by MMP-2 promoted tubular structure formation by the LCLC cell lines H460 and H661 in three-dimensional (3D) cultures. Transient up-regulation of MMP-13 or treatment with recombinant MMP-13 protein abrogated tubular structure formation of H460 cells in 3D culture. Treated cells with Ln-5 fragments cleaved by MMP-2 stimulated EGFR and F-actin expression. Ln-5 fragments cleaved by MMP-13 decreased EGFR/F-actin expression and disrupted VM formation. MMP-13 expression was negatively correlated with VM, Ln-5 and EGFR in LCLC tissues and xenograft. In vivo experiments revealed that VM was decreased when the number of endothelium-dependent vessels (EDVs) increased during xenograft tumour growth, whereas MMP-13 expression was progressively increased. In conclusion, MMP-2 promoted and MMP-13 disrupted VM formation in LCLC by cleaving Ln-5 to influence EGFR signal activation. MMP-13 may regulate VM and EDV formation.
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MESH Headings
- Actins/genetics
- Actins/metabolism
- Animals
- Carcinoma, Large Cell/genetics
- Carcinoma, Large Cell/metabolism
- Carcinoma, Large Cell/pathology
- Carcinoma, Large Cell/therapy
- Cell Adhesion Molecules/genetics
- Cell Adhesion Molecules/metabolism
- Cell Adhesion Molecules/pharmacology
- Cell Culture Techniques
- Cell Line, Tumor
- ErbB Receptors/genetics
- ErbB Receptors/metabolism
- Gene Expression Regulation, Neoplastic
- Humans
- Lung Neoplasms/genetics
- Lung Neoplasms/metabolism
- Lung Neoplasms/pathology
- Lung Neoplasms/therapy
- Male
- Matrix Metalloproteinase 13/genetics
- Matrix Metalloproteinase 13/metabolism
- Matrix Metalloproteinase 2/genetics
- Matrix Metalloproteinase 2/metabolism
- Mice
- Mice, Inbred BALB C
- Mice, Nude
- Molecular Mimicry
- Neovascularization, Pathologic/genetics
- Neovascularization, Pathologic/metabolism
- Neovascularization, Pathologic/pathology
- Neovascularization, Pathologic/prevention & control
- Signal Transduction
- Transfection
- Tumor Burden
- Xenograft Model Antitumor Assays
- Kalinin
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Affiliation(s)
- Yanlei Li
- Department of PathologyTianjin Medical UniversityTianjinChina
| | - Baocun Sun
- Department of PathologyTianjin Medical UniversityTianjinChina
- Department of PathologyTianjin Cancer HospitalTianjin Medical UniversityTianjinChina
- Department of PathologyTianjin General HospitalTianjin Medical UniversityTianjinChina
| | - Xiulan Zhao
- Department of PathologyTianjin Medical UniversityTianjinChina
- Department of PathologyTianjin General HospitalTianjin Medical UniversityTianjinChina
| | - Xudong Wang
- Department of Maxillofacial and Otorhinolaryngology Head and Neck SurgeryTianjin Medical University Cancer Institute and HospitalTianjinChina
| | - Danfang Zhang
- Department of PathologyTianjin Medical UniversityTianjinChina
- Department of PathologyTianjin General HospitalTianjin Medical UniversityTianjinChina
| | - Qiang Gu
- Department of PathologyTianjin Medical UniversityTianjinChina
- Department of PathologyTianjin General HospitalTianjin Medical UniversityTianjinChina
| | - Tieju Liu
- Department of PathologyTianjin Medical UniversityTianjinChina
- Department of PathologyTianjin General HospitalTianjin Medical UniversityTianjinChina
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2
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Ávila-Rodríguez D, Solano Agama C, González-Pozos S, Vicente Méndez-Méndez J, Ortiz Plata A, Arreola-Mendoza L, Mendoza-Garrido ME. The shift in GH3 cell shape and cell motility is dependent on MLCK and ROCK. Exp Cell Res 2017; 354:1-17. [PMID: 28300565 DOI: 10.1016/j.yexcr.2017.03.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 03/02/2017] [Accepted: 03/09/2017] [Indexed: 11/24/2022]
Abstract
Cytoskeletal organization, actin-myosin contractility and the cell membrane together regulate cell morphology in response to the cell environment, wherein the extracellular matrix (ECM) is an indispensable component. Plasticity in cell shape enables cells to adapt their migration mode to their surroundings. GH3 endocrine cells respond to different ECM proteins, acquiring different morphologies: a rounded on collagen I-III (C I-III) and an elongated on collagen IV (C IV). However, the identities of the molecules that participate in these responses remain unknown. Considering that actin-myosin contractility is crucial to maintaining cell shape, we analyzed the participation of MLCK and ROCK in the acquisition of cell shape, the generation of cellular tension and the cell motility mode. We found that a rounded shape with high cortical tension depends on MLCK and ROCK, whereas in cells with an elongated shape, MLCK is the primary protein responsible for cell spreading. Further, in cells with a slow and directionally persistent motility, MLCK predominates, while rapid and erratic movement is ROCK-dependent. This behavior also correlates with GTPase activation. Cells on C I-III exhibited higher Rho-GTPase activity than cells on C IV and vice versa with Rac-GTPase activity, showing a plastic response of GH3 cells to their environment, leading to the generation of different cytoskeleton and membrane organizations and resulting in two movement strategies, rounded and fibroblastoid-like.
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Affiliation(s)
- Dulce Ávila-Rodríguez
- Department of Physiology, Biophysics and Neuroscience, Center for Research and Advanced Studies (CINVESTAV), Mexico City, Mexico
| | - Carmen Solano Agama
- Department of Physiology, Biophysics and Neuroscience, Center for Research and Advanced Studies (CINVESTAV), Mexico City, Mexico
| | - Sirenia González-Pozos
- Central Laboratories, Center for Research and Advanced Studies (CINVESTAV), Mexico City, Mexico
| | - Juan Vicente Méndez-Méndez
- Center of Nanosciences and Micro and Nanotechnology (CNMN), National Polytechnic Institute, Mexico City, Mexico
| | - Alma Ortiz Plata
- Laboratory of Experimental Neuropathology, National Institute of Neurology and Neurosurgery, Manuel Velasco Suarez, Mexico City, Mexico
| | - Laura Arreola-Mendoza
- Department of Biosciences and Engineering, Center for Interdisciplinary Research and Studies on Environment and Development (CIIEMAD), National Polytechnic Institute, Mexico City, Mexico
| | - María E Mendoza-Garrido
- Department of Physiology, Biophysics and Neuroscience, Center for Research and Advanced Studies (CINVESTAV), Mexico City, Mexico.
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3
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Syaidah R, Tsukada T, Azuma M, Horiguchi K, Fujiwara K, Kikuchi M, Yashiro T. Fibromodulin Expression in Folliculostellate Cells and Pericytes Is Promoted by TGFβ Signaling in Rat Anterior Pituitary Gland. Acta Histochem Cytochem 2016; 49:171-179. [PMID: 28127105 PMCID: PMC5263227 DOI: 10.1267/ahc.16021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 10/07/2016] [Indexed: 11/22/2022] Open
Abstract
Fibromodulin belongs to the family of small leucine-rich proteoglycans (SLRPs), an active component of extracellular matrix. It directly binds collagens to promote fibrillogenesis and also binds transforming growth factor-beta (TGFβ) to antagonize its actions. Our previous studies of rat anterior pituitary gland revealed that fibromodulin is expressed in folliculostellate cells and pericytes. Although our recent study showed that TGFβ2 secreted from folliculostellate cells induces collagen synthesis in pericytes, the involvement of fibromodulin in TGFβ2-mediated collagen regulation has not been studied. The present study examined the effect of TGFβ2 on fibromodulin synthesis in rat anterior pituitary gland. In situ hybridization for TGFβ receptor II and immunohistological techniques revealed the presence of TGFβ receptor II in folliculostellate cells and pericytes. To confirm canonical TGFβ intracellular signaling, Smad2 immunocytochemistry was performed. Nuclear translocation of Smad2 was observed in folliculostellate cells and pericytes after TGFβ2 treatment. TGFβ2 strongly enhanced fibromodulin mRNA and protein expressions, and TGFβ2-induced mRNA expression was completely blocked by TGFβ receptor I inhibitor (SB431542). These results suggest that folliculostellate cells and pericytes exhibit canonical TGFβ2 signaling, which is associated with fibromodulin production. Thus, this is the first report to show that TGFβ signaling regulates the endogenous TGFβ antagonist fibromodulin in the gland.
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Affiliation(s)
- Rahimi Syaidah
- Division of Histology and Cell Biology, Department of Anatomy, Jichi Medical University School of Medicine
| | - Takehiro Tsukada
- Division of Histology and Cell Biology, Department of Anatomy, Jichi Medical University School of Medicine
| | - Morio Azuma
- Division of Histology and Cell Biology, Department of Anatomy, Jichi Medical University School of Medicine
| | - Kotaro Horiguchi
- Laboratory of Anatomy and Cell Biology, Department of Health Sciences, Kyorin University
| | - Ken Fujiwara
- Division of Histology and Cell Biology, Department of Anatomy, Jichi Medical University School of Medicine
| | - Motoshi Kikuchi
- Division of Histology and Cell Biology, Department of Anatomy, Jichi Medical University School of Medicine
- Laboratory of Natural History, Jichi Medical University School of Medicine
| | - Takashi Yashiro
- Division of Histology and Cell Biology, Department of Anatomy, Jichi Medical University School of Medicine
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4
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Tsukada T, Azuma M, Horiguchi K, Fujiwara K, Kouki T, Kikuchi M, Yashiro T. Folliculostellate cell interacts with pericyte via TGFβ2 in rat anterior pituitary. J Endocrinol 2016; 229:159-70. [PMID: 26957638 DOI: 10.1530/joe-16-0033] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Accepted: 03/07/2016] [Indexed: 12/14/2022]
Abstract
The anterior pituitary gland comprises five types of endocrine cells plus non-endocrine cells including folliculostellate cells, endothelial cells, and capillary mural cells (pericytes). In addition to being controlled by the hypothalamic-pituitary-target organ axis, the functions of these cells are likely regulated by local cell and extracellular matrix (ECM) interactions. However, these complex interactions are not fully understood. We investigated folliculostellate cell-mediated cell-to-cell interaction. Using S100β-GFP transgenic rats, which express GFP in folliculostellate cells, we designed a three-dimensional cell culture to examine the effects of folliculostellate cells. Interestingly, removal of folliculostellate cells reduced collagen synthesis (Col1a1 and Col3a1). Because pericytes are important collagen-producing cells in the gland, we stained for desmin (a pericyte marker). Removal of folliculostellate cells resulted in fewer desmin-positive pericytes and less desmin mRNA. We then attempted to identify the factor mediating folliculostellate cell-pericyte interaction. RT-PCR and in situ hybridization revealed that the important profibrotic factor transforming growth factor beta-2 (TGFβ2) was specifically expressed in folliculostellate cells and that TGFβ receptor II was expressed in pericytes, endothelial cells, and parenchymal cells. Immunocytochemistry showed that TGFβ2 induced SMAD2 nuclear translocation in pericytes. TGFβ2 increased collagen synthesis in a dose-dependent manner. This action was completely blocked by TGFβ receptor I inhibitor (SB431542). Diminished collagen synthesis in folliculostellate cell-deficient cell aggregates was partially recovered by TGFβ2. TGFβ2-mediated folliculostellate cell-pericyte interaction appears to be essential for collagen synthesis in rat anterior pituitary. This finding sheds new light on local cell-ECM interactions in the gland.
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Affiliation(s)
- Takehiro Tsukada
- Division of Histology and Cell BiologyDepartment of Anatomy, Jichi Medical University School of Medicine, Tochigi, Japan
| | - Morio Azuma
- Division of Histology and Cell BiologyDepartment of Anatomy, Jichi Medical University School of Medicine, Tochigi, Japan
| | - Kotaro Horiguchi
- Laboratory of Anatomy and Cell BiologyDepartment of Health Sciences, Kyorin University, Tokyo, Japan
| | - Ken Fujiwara
- Division of Histology and Cell BiologyDepartment of Anatomy, Jichi Medical University School of Medicine, Tochigi, Japan
| | - Tom Kouki
- Division of Histology and Cell BiologyDepartment of Anatomy, Jichi Medical University School of Medicine, Tochigi, Japan
| | - Motoshi Kikuchi
- Laboratory of Natural HistoryJichi Medical University School of Medicine, Tochigi, Japan
| | - Takashi Yashiro
- Division of Histology and Cell BiologyDepartment of Anatomy, Jichi Medical University School of Medicine, Tochigi, Japan
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5
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Wu X, Cao MP, Shen YY, Chu KP, Tao WB, Song WT, Liu LP, Wang XH, Zheng YF, Chen SD, Zeng QL, Xia RH. Weak power frequency magnetic field acting similarly to EGF stimulation, induces acute activations of the EGFR sensitive actin cytoskeleton motility in human amniotic cells. PLoS One 2014; 9:e87626. [PMID: 24505297 PMCID: PMC3914819 DOI: 10.1371/journal.pone.0087626] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Accepted: 12/16/2013] [Indexed: 12/30/2022] Open
Abstract
In this article, we have examined the motility-related effects of weak power frequency magnetic fields (MFs) on the epidermal growth factor receptor (EGFR)-sensitive motility mechanism, including the F-actin cytoskeleton, growth of invasive protrusions and the levels of signal molecules in human amniotic epithelial (FL) cells. Without extracellular EGF stimulation, the field stimulated a large growth of new protrusions, especially filopodia and lamellipodia, an increased population of vinculin-associated focal adhesions. And, an obvious reduction of stress fiber content in cell centers was found, corresponding to larger cell surface areas and decreased efficiency of actin assembly of FL cells in vitro, which was associated with a decrease in overall F-actin content and special distributions. These effects were also associated with changes in protein content or distribution patterns of the EGFR downstream motility-related signaling molecules. All of these effects are similar to those following epidermal growth factor (EGF) stimulation of the cells and are time dependent. These results suggest that power frequency MF exposure acutely affects the migration/motility-related actin cytoskeleton reorganization that is regulated by the EGFR-cytoskeleton signaling pathway. Therefore, upon the MF exposure, cells are likely altered to be ready to transfer into a state of migration in response to the stimuli.
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Affiliation(s)
- Xia Wu
- Physics Department, East China Normal University, Shanghai, China
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, China
| | - Mei-Ping Cao
- Physics Department, East China Normal University, Shanghai, China
| | - Yun-Yun Shen
- Bioelectromagnetics Laboratory, Zhejiang University, Hangzhou, China
| | - Ke-Ping Chu
- Physics Department, East China Normal University, Shanghai, China
| | - Wu-Bin Tao
- Physics Department, East China Normal University, Shanghai, China
| | - Wei-Tao Song
- Physics Department, East China Normal University, Shanghai, China
| | - Li-Ping Liu
- School of Life Sciences, Fudan University, Shanghai, China
| | - Xiang-Hui Wang
- Physics Department, East China Normal University, Shanghai, China
| | - Yu-Fang Zheng
- School of Life Sciences, Fudan University, Shanghai, China
| | - Shu-De Chen
- Physics Department, East China Normal University, Shanghai, China
| | - Qun-Li Zeng
- Bioelectromagnetics Laboratory, Zhejiang University, Hangzhou, China
| | - Ruo-Hong Xia
- Physics Department, East China Normal University, Shanghai, China
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, China
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6
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Choi GCG, Li J, Wang Y, Li L, Zhong L, Ma B, Su X, Ying J, Xiang T, Rha SY, Yu J, Sung JJY, Tsao SW, Chan ATC, Tao Q. The Metalloprotease ADAMTS8 Displays Antitumor Properties through Antagonizing EGFR–MEK–ERK Signaling and Is Silenced in Carcinomas by CpG Methylation. Mol Cancer Res 2013; 12:228-38. [PMID: 24184540 DOI: 10.1158/1541-7786.mcr-13-0195] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Gigi C G Choi
- Room 315, Cancer Center, PWH, The Chinese University of Hong Kong, Shatin, Hong Kong.
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7
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Tsukada T, Kouki T, Fujiwara K, Ramadhani D, Horiguchi K, Kikuchi M, Yashiro T. Reassembly of anterior pituitary organization by hanging drop three-dimensional cell culture. Acta Histochem Cytochem 2013; 46:121-7. [PMID: 24023396 PMCID: PMC3766829 DOI: 10.1267/ahc.13015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Accepted: 07/09/2013] [Indexed: 11/22/2022] Open
Abstract
The anterior pituitary gland comprises 5 types of hormone-producing cells and non-endocrine cells, such as folliculostellate (FS) cells. The cells form a lobular structure surrounded by extracellular matrix (ECM) but are not randomly distributed in each lobule; hormone-producing cells have affinities for specific cell types (topographic affinity), and FS cells form a homotypic meshwork. To determine whether this cell and ECM organization can be reproduced in vitro, we developed a 3-dimensional (3D) model that utilizes hanging drop cell culture. We found that the topographic affinities of hormone-producing cells were indeed maintained (ie, GH to ACTH cells, GH to TSH cells, PRL to LH/FSH cells). Fine structures in hormone-producing cells retained their normal appearance. In addition, FS cells displayed well-developed cytoplasmic protrusions, which interconnected with adjacent FS cells to form a 3D meshwork. In addition, reassembly of gap junctions and pseudofollicles among FS cells was observed in cell aggregates. Major ECM components—collagens and laminin—were deposited and distributed around the cells. In sum, the dissociated anterior pituitary cells largely maintained their in vivo anterior pituitary architectures. This culture system appears to be a powerful experimental tool for detailed analysis of anterior pituitary cell organization.
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Affiliation(s)
- Takehiro Tsukada
- Division of Histology and Cell Biology, Department of Anatomy, Jichi Medical University School of Medicine
| | - Tom Kouki
- Division of Histology and Cell Biology, Department of Anatomy, Jichi Medical University School of Medicine
| | - Ken Fujiwara
- Division of Histology and Cell Biology, Department of Anatomy, Jichi Medical University School of Medicine
| | - Dini Ramadhani
- Division of Histology and Cell Biology, Department of Anatomy, Jichi Medical University School of Medicine
| | - Kotaro Horiguchi
- Division of Histology and Cell Biology, Department of Anatomy, Jichi Medical University School of Medicine
| | - Motoshi Kikuchi
- Division of Histology and Cell Biology, Department of Anatomy, Jichi Medical University School of Medicine
| | - Takashi Yashiro
- Division of Histology and Cell Biology, Department of Anatomy, Jichi Medical University School of Medicine
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8
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Regulation of integrin adhesions by varying the density of substrate-bound epidermal growth factor. Biointerphases 2012; 7:23. [PMID: 22589066 DOI: 10.1007/s13758-012-0023-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2011] [Accepted: 02/13/2012] [Indexed: 01/25/2023] Open
Abstract
Substrates coated with specific bioactive ligands are important for tissue engineering, enabling the local presentation of extracellular stimulants at controlled positions and densities. In this study, we examined the cross-talk between integrin and epidermal growth factor (EGF) receptors following their interaction with surface-immobilized Arg-Gly-Asp (RGD) and EGF ligands, respectively. Surfaces of glass coverslips, modified with biotinylated silane-polyethylene glycol, were functionalized by either biotinylated RGD or EGF (or both) via the biotin-NeutrAvidin interaction. Fluorescent labeling of the adhering A431 epidermoid carcinoma cells for zyxin or actin indicated that EGF had a dual effect on focal adhesions (FA) and stress fibers: at low concentrations (0.1; 1 ng/ml), it stimulated their growth; whereas at higher concentrations, on surfaces with low to intermediate RGD densities, it induced their disassembly, leading to cell detachment. The EGF-dependent dissociation of FAs was, however, attenuated on higher RGD density surfaces. Simultaneous stimulation by both immobilized RGD and EGF suggest a strong synergy between integrin and EGFR signaling, in FA induction and cell spreading. A critical threshold level of EGF was required to induce significant variation in cell adhesion; beyond this critical density, the immobilized molecule had a considerably stronger effect on cell adhesion than did soluble EGF. The mechanisms underlying this synergy between the adhesion ligand and EGF are discussed.
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Wang J, Zhang J, Wu J, Luo D, Su K, Shi W, Liu J, Tian Y, Wei L. MicroRNA-610 inhibits the migration and invasion of gastric cancer cells by suppressing the expression of vasodilator-stimulated phosphoprotein. Eur J Cancer 2011; 48:1904-13. [PMID: 22189055 DOI: 10.1016/j.ejca.2011.11.026] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2011] [Revised: 11/13/2011] [Accepted: 11/24/2011] [Indexed: 02/08/2023]
Abstract
Vasodilator-stimulated phosphoprotein (VASP) has been implicated in the establishment of cancerous phenotypes. However, the role of VASP in gastric cancer progression and metastasis remains poorly understood. Here, we demonstrated that VASP was upregulated by epidermal growth factor (EGF) and promoted the migration and invasion of gastric cancer cells. Then we explored the regulatory mechanisms responsible for high expression of VASP in gastric cancer. Based on miRNA expression profiling of the paired gastric cancer tissues and their adjacent non-tumour gastric tissues 18 miRNAs were identified including microRNA-610 (miR-610) which were down-regulated in gastric cancer. Next, we observed an inverse correlation between VASP and miR-610 expression levels in gastric cancer cells after EGF stimulation. Then we performed bioinformatics analysis, Western blot and reverse transcription polymerase chain reaction (RT-PCR) analysis and luciferase assay to establish that miR-610 directly targets VASP 3'-UTR and inhibits its expression. Functionally, we demonstrated that miR610-mediated inhibition of VASP expression resulted in a significant reduction in the migration and invasion properties of gastric cancer cells. The identification of miR-610 as a novel miRNA regulated by EGF that targets VASP in gastric cancer cells suggests that EGF-miR610-VASP axis may be exploited for therapeutic intervention to inhibit gastric cancer progression and metastasis.
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Affiliation(s)
- Jing Wang
- Department of Pathology and Pathophysiology, School of Basic Medical Sciences, Hubei Provincial Key Laboratory of Allergy and Immune-Related Diseases and Center for Medical Research, Research Center of Food and Drug Evaluation, Wuhan University, Wuhan, PR China
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Fujiwara K, Jindatip D, Kikuchi M, Yashiro T. In situ hybridization reveals that type I and III collagens are produced by pericytes in the anterior pituitary gland of rats. Cell Tissue Res 2010; 342:491-5. [PMID: 21086137 DOI: 10.1007/s00441-010-1078-1] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2010] [Accepted: 10/08/2010] [Indexed: 11/28/2022]
Abstract
Type I and III collagens widely occur in the rat anterior pituitary gland and are the main components of the extracellular matrix (ECM). Although ECM components possibly play an important role in the function of the anterior pituitary gland, little is known about collagen-producing cells. Type I collagen is a heterotrimer of two α1(I) chains (the product of the col1a1 gene) and one α2(I) chain (the product of the col1a2 gene). Type III collagen is a homotrimer of α1(III) chains (the product of the col3a1 gene). We used in situ hybridization with digoxigenin-labeled cRNA probes to examine the expression of col1a1, col1a2, and col3a1 mRNAs in the pituitary gland of adult rats. mRNA expression for these collagen genes was clearly observed, and cells expressing col1a1, col1a2, and col3a1 mRNA were located around capillaries in the gland. We also investigated the possible double-staining of collagen mRNA and pituitary hormones, S-100 protein (a marker of folliculo-stellate cells), or desmin (a marker of pericytes). Col1a1 and col3a1 mRNA were identified in desmin-immunopositive cells. Thus, only pericytes produce type I and III collagens in the rat anterior pituitary gland.
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Affiliation(s)
- Ken Fujiwara
- Department of Anatomy, Division of Histology and Cell Biology, School of Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke, Tochigi 329-0498, Japan
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11
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Kofer-Geles M, Gottfried I, Haklai R, Elad-Zefadia G, Kloog Y, Ashery U. Rasosomes spread Ras signals from plasma membrane 'hotspots'. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2009; 1793:1691-702. [PMID: 19695294 DOI: 10.1016/j.bbamcr.2009.08.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2009] [Revised: 07/28/2009] [Accepted: 08/10/2009] [Indexed: 12/31/2022]
Abstract
Ras proteins regulate cell growth, differentiation, and apoptosis from various cellular platforms. We have recently identified a novel potential signaling platform, the rasosome, which moves rapidly near the plasma membrane (PM) and in the cytosol, carrying multiple copies of palmitoylated Ras proteins. In the present study we demonstrate that rasosomes are unique entities distinct from PM nanoclusters or from endocytotic compartments. In addition, we examine whether rasosomes can act as regulated Ras signaling platforms. We show that a single rasosome simultaneously carries different types of Ras molecules in their active and inactive state, suggesting that rasosomes can upload and download Ras signals. Total internal reflection fluorescence (TIRF) microscopy combined with fast time-lapse and a new spatial analysis algorithm demonstrate that rasosome movement near the PM is restricted to distinctive areas, rasosomal 'hotspots', localized between actin filament cages. In addition, Ras-binding domain of Raf-1 (RBD) is recruited to Ras in rasosomal hotspots as revealed by bimolecular fluorescence complementation experiments. Interestingly, epidermal growth factor stimulates H/NRas activation on rasosomes and the subsequent recruitment of RBD to rasosomes. Moreover, we show that rasosomes are loaded with Ras downstream effectors and modulators. These findings establish that physiological stimulation originating from PM hotspots is transduced to rasosomes, which appear to serve as robust Ras signaling platforms that spread signals across the cell.
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Affiliation(s)
- Merav Kofer-Geles
- Department of Neurobiology, The George S. Wise Faculty of Life Sciences, Tel Aviv University, 69978 Tel Aviv, Israel
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12
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Song W, Xuan H, Lin Q. Epidermal growth factor induces changes of interaction between epidermal growth factor receptor and actin in intact cells. Acta Biochim Biophys Sin (Shanghai) 2008. [DOI: 10.1111/j.1745-7270.2008.00447.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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13
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Uysal-Onganer P, Djamgoz MB. Epidermal growth factor potentiates in vitro metastatic behaviour of human prostate cancer PC-3M cells: involvement of voltage-gated sodium channel. Mol Cancer 2007; 6:76. [PMID: 18036246 PMCID: PMC2211503 DOI: 10.1186/1476-4598-6-76] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2007] [Accepted: 11/24/2007] [Indexed: 12/16/2022] Open
Abstract
Background Although a high level of functional voltage-gated sodium channel (VGSC) expression has been found in strongly metastatic human and rat prostate cancer (PCa) cells, the mechanism(s) responsible for the upregulation is unknown. The concentration of epidermal growth factor (EGF), a modulator of ion channels, in the body is highest in prostatic fluid. Thus, EGF could be involved in the VGSC upregulation in PCa. The effects of EGF on VGSC expression in the highly metastatic human PCa PC-3M cell line, which was shown previously to express both functional VGSCs and EGF receptors, were investigated. A quantitative approach, from gene level to cell behaviour, was used. mRNA levels were determined by real-time PCR. Protein expression was studied by Western blots and immunocytochemistry and digital image analysis. Functional assays involved measurements of transverse migration, endocytic membrane activity and Matrigel invasion. Results Exogenous EGF enhanced the cells' in vitro metastatic behaviours (migration, endocytosis and invasion). Endogenous EGF had a similar involvement. EGF increased VGSC Nav1.7 (predominant isoform in PCa) mRNA and protein expressions. Co-application of the highly specific VGSC blocker tetrodotoxin (TTX) suppressed the effect of EGF on all three metastatic cell behaviours studied. Conclusion 1) EGF has a major involvement in the upregulation of functional VGSC expression in human PCa PC-3M cells. (2) VGSC activity has a significant intermediary role in potentiating effect of EGF in human PCa.
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Affiliation(s)
- Pinar Uysal-Onganer
- Neuroscience Solutions to Cancer Research Group, Division of Cell and Molecular Biology, Sir Alexander Fleming Building, Imperial College London, South Kensington Campus, London SW7 2AZ, UK.
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