1
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Gupta DP, Bhusal A, Rahman MH, Kim JH, Choe Y, Jang J, Jung HJ, Kim UK, Park JS, Maeng LS, Suk K, Song GJ. EBP50 is a key molecule for the Schwann cell-axon interaction in peripheral nerves. Prog Neurobiol 2023; 231:102544. [PMID: 37940033 DOI: 10.1016/j.pneurobio.2023.102544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 10/25/2023] [Accepted: 11/02/2023] [Indexed: 11/10/2023]
Abstract
Peripheral nerve injury disrupts the Schwann cell-axon interaction and the cellular communication between them. The peripheral nervous system has immense potential for regeneration extensively due to the innate plastic potential of Schwann cells (SCs) that allows SCs to interact with the injured axons and exert specific repair functions essential for peripheral nerve regeneration. In this study, we show that EBP50 is essential for the repair function of SCs and regeneration following nerve injury. The increased expression of EBP50 in the injured sciatic nerve of control mice suggested a significant role in regeneration. The ablation of EBP50 in mice resulted in delayed nerve repair, recovery of behavioral function, and remyelination following nerve injury. EBP50 deficiency led to deficits in SC functions, including proliferation, migration, cytoskeleton dynamics, and axon interactions. The adeno-associated virus (AAV)-mediated local expression of EBP50 improved SCs migration, functional recovery, and remyelination. ErbB2-related proteins were not differentially expressed in EBP50-deficient sciatic nerves following injury. EBP50 binds and stabilizes ErbB2 and activates the repair functions to promote regeneration. Thus, we identified EBP50 as a potent SC protein that can enhance the regeneration and functional recovery driven by NRG1-ErbB2 signaling, as well as a novel regeneration modulator capable of potential therapeutic effects.
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Affiliation(s)
- Deepak Prasad Gupta
- Translational Brain Research Center, International St. Mary's Hospital, Catholic Kwandong University, Incheon, Republic of Korea; Department of Pharmacology, Brain Science and Engineering Institute, BK21 Plus KNU Biomedical Convergence Program, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Anup Bhusal
- Department of Pharmacology, Brain Science and Engineering Institute, BK21 Plus KNU Biomedical Convergence Program, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Md Habibur Rahman
- Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Jae-Hong Kim
- Department of Pharmacology, Brain Science and Engineering Institute, BK21 Plus KNU Biomedical Convergence Program, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Youngshik Choe
- Korea Brain Research Institute, Daegu, Republic of Korea
| | - Jaemyung Jang
- Korea Brain Research Institute, Daegu, Republic of Korea
| | - Hyun Jin Jung
- Korea Brain Research Institute, Daegu, Republic of Korea
| | - Un-Kyung Kim
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, Republic of Korea
| | - Jin-Sung Park
- Department of Neurology, School of Medicine, Kyungpook National University, Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea
| | - Lee-So Maeng
- Department of Hospital Pathology, Incheon St. Mary's Hospital College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Kyoungho Suk
- Department of Pharmacology, Brain Science and Engineering Institute, BK21 Plus KNU Biomedical Convergence Program, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Gyun Jee Song
- Translational Brain Research Center, International St. Mary's Hospital, Catholic Kwandong University, Incheon, Republic of Korea; Department of Medicine, College of Medicine, Catholic Kwandong University, Gangneung, Gangwon-do, Republic of Korea.
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2
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Nakagawa M, Matsumoto T, Yokoi A, Hashimura M, Oguri Y, Konno R, Ishibashi Y, Ito T, Ohhigata K, Harada Y, Fukagawa N, Kodera Y, Saegusa M. Interaction between membranous EBP50 and myosin 9 as a favorable prognostic factor in ovarian clear cell carcinoma. Mol Oncol 2023; 17:2168-2182. [PMID: 37539980 PMCID: PMC10552901 DOI: 10.1002/1878-0261.13503] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 06/29/2023] [Accepted: 08/01/2023] [Indexed: 08/05/2023] Open
Abstract
Ezrin-radixin-moesin-binding phosphoprotein 50 (EBP50) is a scaffold protein that is required for epithelial polarity. Knockout (KO) of membranous EBP50 (Me-EBP50) in ovarian clear cell carcinoma (OCCC) cells induced an epithelial-mesenchymal transition (EMT)-like phenotype, along with decreased proliferation, accelerated migration capability, and induction of cancer stem cell (CSC)-like properties. Shotgun proteomics analysis of proteins that co-immunoprecipitated with EBP50 revealed that Me-EBP50 strongly interacts with myosin 9 (MYH9). Specific inhibition of MYH9 with blebbistatin phenocopied Me-EBP50 KO, and blebbistatin treatment potentiated the effects of Me-EBP50 KO. In OCCC cells from clinical samples, Me-EBP50 and MYH9 were co-localized at the apical plasma membrane. Patients with a combination of Me-EBP50-high and MYH9-high scores had the best prognosis for overall and progression-free survival. Our data suggest that Me-EBP50 has tumor-suppressive effects through the establishment and maintenance of epithelial polarization. By contrast, loss of Me-EBP50 expression induces EMT-like phenotypes, probably due to MYH9 dysfunction; this results in increased cell mobility and enhanced CSC-like properties, which in turn promote OCCC progression.
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Affiliation(s)
- Mayu Nakagawa
- Department of PathologyKitasato University School of MedicineSagamiharaJapan
| | - Toshihide Matsumoto
- Department of PathologyKitasato University School of Allied Health ScienceSagamiharaJapan
| | - Ako Yokoi
- Department of PathologyKitasato University School of MedicineSagamiharaJapan
| | - Miki Hashimura
- Department of PathologyKitasato University School of MedicineSagamiharaJapan
| | - Yasuko Oguri
- Department of PathologyKitasato University School of MedicineSagamiharaJapan
| | - Ryo Konno
- Center for Disease Proteomics, School of ScienceKitasato UniversitySagamiharaJapan
| | - Yu Ishibashi
- Department of PathologyKitasato University School of MedicineSagamiharaJapan
| | - Takashi Ito
- Department of PathologyKitasato University School of MedicineSagamiharaJapan
| | - Kensuke Ohhigata
- Department of PathologyKitasato University School of MedicineSagamiharaJapan
| | - Yohei Harada
- Department of PathologyKitasato University School of MedicineSagamiharaJapan
| | - Naomi Fukagawa
- Department of PathologyKitasato University School of MedicineSagamiharaJapan
| | - Yoshio Kodera
- Center for Disease Proteomics, School of ScienceKitasato UniversitySagamiharaJapan
| | - Makoto Saegusa
- Department of PathologyKitasato University School of MedicineSagamiharaJapan
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3
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Oncel S, Basson MD. ZINC40099027 promotes monolayer circular defect closure by a novel pathway involving cytosolic activation of focal adhesion kinase and downstream paxillin and ERK1/2. Cell Tissue Res 2022; 390:261-279. [PMID: 36001146 DOI: 10.1007/s00441-022-03674-1] [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: 03/10/2022] [Accepted: 08/17/2022] [Indexed: 11/02/2022]
Abstract
ZINC40099027 (ZN27) is a specific focal adhesion kinase (FAK) activator that promotes murine mucosal wound closure after ischemic or NSAID-induced injury. Diverse motogenic pathways involve FAK, but the direct consequences of pure FAK activation have not been studied, and how ZN27-induced FAK activation stimulates wound closure remained unclear. We investigated signaling and focal adhesion (FA) turnover after FAK activation by ZN27 in Caco-2 cells, confirming key results in CCD841 cells. ZN27 increased Caco-2 FAK-Y-397, FAK-Y-576/7, paxillin-Y-118, and ERK 1/2 phosphorylation and decreased FAK-Y-925 phosphorylation, without altering FAK-Y-861, p38, Jnk, or Akt phosphorylation. ZN27 increased FAK-paxillin interaction while decreasing FAK-Grb2 association. ZN27 increased membrane-associated FAK-Y-397 and FAK-Y-576/7 phosphorylation and paxillin-Y-118 and ERK 1/2 phosphorylation but decreased FAK-Y-925 phosphorylation without altering Src or Grb2. Moreover, ZN27 increased the fluorescence intensity of GFP-FAK and pFAK-Y397 in FAs and increased the total number of FAs but reduced their size in GFP-FAK-transfected Caco-2 cells, consistent with increased FA turnover. In contrast, FAK-Y397F transfection prevented ZN27 effects on FAK size and number and FAK and pFAK fluorescent intensity in FAs. We confirmed the proposed FAK/paxillin/ERK pathway using PP2 and U0126 to block Src and MEK1/2 in Caco-2 and CCD841 cells. These results suggest that ZN27 promotes intestinal epithelial monolayer defect closure by stimulating autophosphorylation of FAK in the cytosol, distinct from classical models of FAK activation in the FA. Phosphorylated FAK translocates to the membrane, where its downstream substrates paxillin and ERK are phosphorylated, leading to FA turnover and human intestinal epithelial cell migration.
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Affiliation(s)
- Sema Oncel
- Department of Biomedical Sciences, University of North Dakota School of Medicine & Health Sciences, Grand Forks, USA
| | - Marc D Basson
- Department of Biomedical Sciences, Department of Surgery, Department of Pathology, University of North Dakota School of Medicine & Health Sciences, Grand Forks, USA.
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4
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Oliverio R, Patenaude V, Liberelle B, Virgilio N, Banquy X, De Crescenzo G. Macroporous dextran hydrogels for controlled growth factor capture and delivery using coiled-coil interactions. Acta Biomater 2022; 153:190-203. [PMID: 36113720 DOI: 10.1016/j.actbio.2022.09.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 08/24/2022] [Accepted: 09/08/2022] [Indexed: 11/01/2022]
Abstract
Macroporous hydrogels possess a vast potential for various applications in the biomedical field. However, due to their large pore size allowing for unrestricted diffusion in the macropore network, macroporous hydrogels alone are not able to efficiently capture and release biomolecules in a controlled manner. There is thus a need for biofunctionalized, affinity-based gels that can efficiently load and release biomolecules in a sustained and controlled manner. For this purpose, we report here the use of a E/K coiled-coil affinity pair for the controlled capture and delivery of growth factors from highly interconnected, macroporous dextran hydrogels. By conjugating the Kcoil peptide to the dextran backbone, we achieved controlled loading and release of Ecoil-tagged Epidermal and Vascular Endothelial Growth Factors. To finely tune the behavior of the gels, we propose four control parameters: (i) macropore size, (ii) Kcoil grafting density, (iii) Ecoil valency and (iv) E/K affinity. We demonstrate that Kcoil grafting can produce a 20-fold increase in passive growth factor capture by macroporous dextran gels. Furthermore, we demonstrate that our gels can release as little as 20% of the loaded growth factors over one week, while retaining bioactivity. Altogether, we propose a versatile, highly tunable platform for the controlled delivery of growth factors in biomedical applications. STATEMENT OF SIGNIFICANCE: This work presents a highly tunable platform for growth factor capture and sustained delivery using affinity peptides in macroporous, fully interconnected dextran hydrogels. It addresses several ongoing challenges by presenting: (i) a versatile platform for the delivery of a wide range of stable, bioactive molecules, (ii) a passive, affinity-based loading of growth factors in the platform, paving the way for in situ (re)loading of the device and (iii) four different control parameters to finely tune growth factor capture and release. Altogether, our macroporous dextran hydrogels have a vast potential for applications in controlled delivery, tissue engineering and regenerative medicine.
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Affiliation(s)
- Romane Oliverio
- Department of Chemical Engineering, Polytechnique Montréal, Montréal, Québec H3T 1J4, Canada; Faculty of Pharmacy, Axe Formulation et Analyse du Médicament (AFAM), Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Victor Patenaude
- Department of Chemical Engineering, Polytechnique Montréal, Montréal, Québec H3T 1J4, Canada
| | - Benoît Liberelle
- Department of Chemical Engineering, Polytechnique Montréal, Montréal, Québec H3T 1J4, Canada
| | - Nick Virgilio
- Department of Chemical Engineering, Centre de Recherche sur les Systèmes Polymères et Composites à Haute Performance (CREPEC), Polytechnique Montréal, Montréal, Québec H3T 1J4, Canada
| | - Xavier Banquy
- Faculty of Pharmacy, Axe Formulation et Analyse du Médicament (AFAM), Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Gregory De Crescenzo
- Department of Chemical Engineering, Polytechnique Montréal, Montréal, Québec H3T 1J4, Canada.
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Sodium Hydrogen Exchanger Regulatory Factor-1 (NHERF1) Regulates Fetal Membrane Inflammation. Int J Mol Sci 2020; 21:ijms21207747. [PMID: 33092043 PMCID: PMC7589612 DOI: 10.3390/ijms21207747] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 10/13/2020] [Accepted: 10/16/2020] [Indexed: 11/20/2022] Open
Abstract
The fetal inflammatory response, a key contributor of infection-associated preterm birth (PTB), is mediated by nuclear factor kappa B (NF-kB) activation. Na+/H+ exchanger regulatory factor-1 (NHERF1) is an adapter protein that can regulate intracellular signal transduction and thus influence NF-kB activation. Accordingly, NHERF1 has been reported to enhance proinflammatory cytokine release and amplify inflammation in a NF-kB-dependent fashion in different cell types. The objective of this study was to examine the role of NHERF1 in regulating fetal membrane inflammation during PTB. We evaluated the levels of NHERF1 in human fetal membranes from term labor (TL), term not in labor (TNIL), and PTB and in a CD1 mouse model of PTB induced by lipopolysaccharide (LPS). Additionally, primary cultures of fetal membrane cells were treated with LPS, and NHERF1 expression and cytokine production were evaluated. Gene silencing methods using small interfering RNA targeting NHERF1 were used to determine the functional relevance of NHERF1 in primary cultures. NHERF1 expression was significantly (p < 0.001) higher in TL and PTB membranes compared to TNIL membranes, and this coincided with enhanced (p < 0.01) interleukin (IL)-6 and IL-8 expression levels. LPS-treated animals delivering PTB had increased levels of NHERF1, IL-6, and IL-8 compared to phosphate-buffered saline (PBS; control) animals. Silencing of NHERF1 expression resulted in a significant reduction in NF-kB activation and IL-6 and IL-8 production as well as increased IL-10 production. In conclusion, downregulation of NHERF1 increased anti-inflammatory IL-10, and reducing NHERF1 expression could be a potential therapeutic strategy to reduce the risk of infection/inflammation associated with PTB.
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Song GJ, Gupta DP, Rahman MH, Park HT, Al Ghouleh I, Bisello A, Lee MG, Park JY, Park HH, Jun JH, Chung KW, Choi BO, Suk K. Loss-of-function of EBP50 is a new cause of hereditary peripheral neuropathy: EBP50 functions in peripheral nerve system. Glia 2020; 68:1794-1809. [PMID: 32077526 DOI: 10.1002/glia.23805] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 02/04/2020] [Accepted: 02/07/2020] [Indexed: 12/12/2022]
Abstract
Finding causative genetic mutations is important in the diagnosis and treatment of hereditary peripheral neuropathies. This study was conducted to find new genes involved in the pathophysiology of hereditary peripheral neuropathy. We identified a new mutation in the EBP50 gene, which is co-segregated with neuropathic phenotypes, including motor and sensory deficit in a family with Charcot-Marie-Tooth disease. EBP50 is known to be important for the formation of microvilli in epithelial cells, and the discovery of this gene mutation allowed us to study the function of EBP50 in the nervous system. EBP50 was strongly expressed in the nodal and paranodal regions of sciatic nerve fibers, where Schwann cell microvilli contact the axolemma, and at the growth tips of primary Schwann cells. In addition, EBP50 expression was decreased in mouse models of peripheral neuropathy. Knockout mice were used to study EBP50 function in the peripheral nervous system. Interestingly motor function deficit and abnormal histology of nerve fibers were observed in EBP50+/- heterozygous mice at 12 months of age, but not 3 months. in vitro studies using Schwann cells showed that NRG1-induced AKT activation and migration were significantly reduced in cells overexpressing the I325V mutant of EBP50 or cells with knocked-down EBP50 expression. In conclusion, we show for the first time that loss of function due to EBP50 gene deficiency or mutation can cause peripheral neuropathy.
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Affiliation(s)
- Gyun Jee Song
- Department of Medical Science, Institute for Bio-Medical Convergence, Catholic Kwandong University, International St. Mary's Hospital, Incheon, Republic of Korea
| | - Deepak Prasad Gupta
- Department of Pharmacology, Brain Science and Engineering Institute, BK21 Plus KNU Biomedical Convergence Program, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Md Habibur Rahman
- Department of Pharmacology, Brain Science and Engineering Institute, BK21 Plus KNU Biomedical Convergence Program, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Hwan Tae Park
- Department of Molecular Neuroscience, College of Medicine, Dong-A University, Busan, Republic of Korea
| | - Imad Al Ghouleh
- Division of Cardiology, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Alessandro Bisello
- Department of Pharmacology and Chemical Biology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Maan-Gee Lee
- Department of Pharmacology, Brain Science and Engineering Institute, BK21 Plus KNU Biomedical Convergence Program, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Jae-Yong Park
- School of Biosystems and Biomedical Sciences, College of Health Sciences, Korea University, Seoul, Republic of Korea
| | - Hyun Ho Park
- College of Pharmacy, Chung-Ang University, Seoul, Republic of Korea
| | - Jin Hyun Jun
- Department of Senior Healthcare, BK21 Plus Program, Graduate School of Eulji University, Department of Biomedical Laboratory Science, College of Health Science, Eulji University, Seongnam, Republic of Korea
| | - Ki Wha Chung
- Department of Biological Sciences, Kongju National University, Gongju, Republic of Korea
| | - Byung-Ok Choi
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Kyoungho Suk
- Department of Pharmacology, Brain Science and Engineering Institute, BK21 Plus KNU Biomedical Convergence Program, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
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7
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Amado-Azevedo J, de Menezes RX, van Nieuw Amerongen GP, van Hinsbergh VWM, Hordijk PL. A functional siRNA screen identifies RhoGTPase-associated genes involved in thrombin-induced endothelial permeability. PLoS One 2018; 13:e0201231. [PMID: 30048510 PMCID: PMC6062096 DOI: 10.1371/journal.pone.0201231] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 07/11/2018] [Indexed: 12/18/2022] Open
Abstract
Thrombin and other inflammatory mediators may induce vascular permeability through the disruption of adherens junctions between adjacent endothelial cells. If uncontrolled, hyperpermeability leads to an impaired barrier, fluid leakage and edema, which can contribute to multi-organ failure and death. RhoGTPases control cytoskeletal dynamics, adhesion and migration and are known regulators of endothelial integrity. Knowledge of the precise role of each RhoGTPase, and their associated regulatory and effector genes, in endothelial integrity is incomplete. Using a combination of a RNAi screen with electrical impedance measurements, we quantified the effect of individually silencing 270 Rho-associated genes on the barrier function of thrombin-activated, primary endothelial cells. Known and novel RhoGTPase-associated regulators that modulate the response to thrombin were identified (RTKN, TIAM2, MLC1, ARPC1B, SEPT2, SLC9A3R1, RACGAP1, RAPGEF2, RHOD, PREX1, ARHGEF7, PLXNB2, ARHGAP45, SRGAP2, ARHGEF5). In conclusion, with this siRNA screen, we confirmed the roles of known regulators of endothelial integrity but also identified new, potential key players in thrombin-induced endothelial signaling.
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Affiliation(s)
- Joana Amado-Azevedo
- Department of Physiology, Amsterdam Cardiovascular Sciences, VU University Medical Center, Amsterdam, The Netherlands
| | - Renee X. de Menezes
- Department of Epidemiology and Biostatistics, VU University Medical Center, Amsterdam, The Netherlands
| | | | - Victor W. M. van Hinsbergh
- Department of Physiology, Amsterdam Cardiovascular Sciences, VU University Medical Center, Amsterdam, The Netherlands
| | - Peter L. Hordijk
- Department of Physiology, Amsterdam Cardiovascular Sciences, VU University Medical Center, Amsterdam, The Netherlands
- * E-mail:
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8
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Vaquero J, Nguyen Ho-Bouldoires TH, Clapéron A, Fouassier L. Role of the PDZ-scaffold protein NHERF1/EBP50 in cancer biology: from signaling regulation to clinical relevance. Oncogene 2017; 36:3067-3079. [PMID: 28068322 DOI: 10.1038/onc.2016.462] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 10/26/2016] [Accepted: 10/31/2016] [Indexed: 12/14/2022]
Abstract
The transmission of cellular information requires fine and subtle regulation of proteins that need to interact in a coordinated and specific way to form efficient signaling networks. The spatial and temporal coordination relies on scaffold proteins. Thanks to protein interaction domains such as PDZ domains, scaffold proteins organize multiprotein complexes enabling the proper transmission of cellular information through intracellular networks. NHERF1/EBP50 is a PDZ-scaffold protein that was initially identified as an organizer and regulator of transporters and channels at the apical side of epithelia through actin-binding ezrin-moesin-radixin proteins. Since, NHERF1/EBP50 has emerged as a major regulator of cancer signaling network by assembling cancer-related proteins. The PDZ-scaffold EBP50 carries either anti-tumor or pro-tumor functions, two antinomic functions dictated by EBP50 expression or subcellular localization. The dual function of NHERF1/EBP50 encompasses the regulation of several major signaling pathways engaged in cancer, including the receptor tyrosine kinases PDGFR and EGFR, PI3K/PTEN/AKT and Wnt-β-catenin pathways.
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Affiliation(s)
- J Vaquero
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, Centre de Recherche Saint-Antoine (CRSA), Paris, France.,FONDATION ARC, Villejuif, France
| | - T H Nguyen Ho-Bouldoires
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, Centre de Recherche Saint-Antoine (CRSA), Paris, France.,FONDATION ARC, Villejuif, France
| | - A Clapéron
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, Centre de Recherche Saint-Antoine (CRSA), Paris, France
| | - L Fouassier
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, Centre de Recherche Saint-Antoine (CRSA), Paris, France
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9
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Schreier B, Schwerdt G, Heise C, Bethmann D, Rabe S, Mildenberger S, Gekle M. Substance-specific importance of EGFR for vascular smooth muscle cells motility in primary culture. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2016; 1863:1519-33. [PMID: 27012600 DOI: 10.1016/j.bbamcr.2016.03.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 03/01/2016] [Accepted: 03/18/2016] [Indexed: 11/26/2022]
Abstract
Besides their importance for the vascular tone, vascular smooth muscle cells (VSMC) also contribute to pathophysiological vessel alterations. Various G-protein coupled receptor ligands involved in vascular dysfunction and remodeling can transactivate the epidermal growth factor receptor (EGFR) of VSMC, yet the importance of EGFR transactivation for the VSMC phenotype is incompletely understood. The aims of this study were (i) to characterize further the importance of the VSMC-EGFR for proliferation, migration and marker gene expression for inflammation, fibrosis and reactive oxygen species (ROS) homeostasis and (ii) to test the hypothesis that vasoactive substances (endothelin-1, phenylephrine, thrombin, vasopressin and ATP) rely differentially on the EGFR with respect to the abovementioned phenotypic alterations. In primary, aortic VSMC from mice without conditional deletion of the EGFR, proliferation, migration, marker gene expression (inflammation, fibrosis and ROS homeostasis) and cell signaling (ERK 1/2, intracellular calcium) were analyzed. VSMC-EGFR loss reduced collective cell migration and single cell migration probability, while no difference between the genotypes in single cell velocity, chemotaxis or marker gene expression could be observed under control conditions. EGF promoted proliferation, collective cell migration, chemokinesis and chemotaxis and leads to a proinflammatory gene expression profile in wildtype but not in knockout VSMC. Comparing the impact of five vasoactive substances (all reported to transactivate EGFR and all leading to an EGFR dependent increase in ERK1/2 phosphorylation), we demonstrate that the importance of EGFR for their action is substance-dependent and most apparent for crowd migration but plays a minor role for gene expression regulation.
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Affiliation(s)
- Barbara Schreier
- Julius-Bernstein-Institute of Physiology, University of Halle-Wittenberg, Magdeburger Strasse 6, 06112 Halle/Saale, Germany.
| | - Gerald Schwerdt
- Julius-Bernstein-Institute of Physiology, University of Halle-Wittenberg, Magdeburger Strasse 6, 06112 Halle/Saale, Germany
| | - Christian Heise
- Julius-Bernstein-Institute of Physiology, University of Halle-Wittenberg, Magdeburger Strasse 6, 06112 Halle/Saale, Germany
| | - Daniel Bethmann
- Julius-Bernstein-Institute of Physiology, University of Halle-Wittenberg, Magdeburger Strasse 6, 06112 Halle/Saale, Germany
| | - Sindy Rabe
- Julius-Bernstein-Institute of Physiology, University of Halle-Wittenberg, Magdeburger Strasse 6, 06112 Halle/Saale, Germany
| | - Sigrid Mildenberger
- Julius-Bernstein-Institute of Physiology, University of Halle-Wittenberg, Magdeburger Strasse 6, 06112 Halle/Saale, Germany
| | - Michael Gekle
- Julius-Bernstein-Institute of Physiology, University of Halle-Wittenberg, Magdeburger Strasse 6, 06112 Halle/Saale, Germany
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10
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Liu N, Li Y, Chen H, Wei W, An Y, Zhu G. RNA interference-mediated NOTCH3 knockdown induces phenotype switching of vascular smooth muscle cells in vitro. Int J Clin Exp Med 2015; 8:12674-12684. [PMID: 26550181 PMCID: PMC4612866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Accepted: 08/02/2015] [Indexed: 06/05/2023]
Abstract
Notch3 plays an important role in differentiation, migration and signal transduction of vascular smooth muscle cells (VSMCs). In this study, we used RNA interference (RNAi) technique to investigate the effect of knocking down the expression of the NOTCH3 gene in VSMCs on the phenotype determination under pathologic status. Real-time PCR and Western Blot experiments verified the expression levels of Notch3 mRNA and protein were reduced more than 40% and 50% in the NOTCH3 siRNA group. When the expression of Notch3 was decreased, the proliferation, apoptosis and immigration of VSMCs were enhanced compared to control groups (P < 0.01). NOTCH3 siRNA VSMCs observed using confocal microscopy showed abnormal nuclear configuration, a disorganized actin filament system, polygonal cell shapes, and decreasing cell sizes. Additionally, knocking down the expression of NOTCH3 may evoke the CASR and FAK expression. In Conclusion, interfering with the expression of NOTCH3 causes VSMCs to exhibit an intermediate phenotype. CaSR and FAK may be involved in the Notch3 signaling pathway.
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Affiliation(s)
- Nan Liu
- Department of Neurology, Military General Hospital of Beijing PLABeijing, China
| | - Ying Li
- Department of Neurology, Military General Hospital of Beijing PLABeijing, China
| | - Hui Chen
- Department of Neurology, Military General Hospital of Beijing PLABeijing, China
| | - Wei Wei
- Department of Neurology, Military General Hospital of Beijing PLABeijing, China
| | - Yulin An
- Reproductive Medicine and Genetics, Military General Hospital of Beijing PLABeijing 100700, China
| | - Guangming Zhu
- Department of Neurology, Military General Hospital of Beijing PLABeijing, China
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Song GJ, Leslie KL, Barrick S, Mamonova T, Fitzpatrick JM, Drombosky KW, Peyser N, Wang B, Pellegrini M, Bauer PM, Friedman PA, Mierke DF, Bisello A. Phosphorylation of ezrin-radixin-moesin-binding phosphoprotein 50 (EBP50) by Akt promotes stability and mitogenic function of S-phase kinase-associated protein-2 (Skp2). J Biol Chem 2014; 290:2879-87. [PMID: 25492869 DOI: 10.1074/jbc.m114.609768] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The regulation of the cell cycle by the ubiquitin-proteasome system is dependent on the activity of E3 ligases. Skp2 (S-phase kinase associated protein-2) is the substrate recognition subunit of the E3 ligase that ubiquitylates the cell cycle inhibitors p21(cip1) and p27(kip1) thus promoting cell cycle progression. Increased expression of Skp2 is frequently observed in diseases characterized by excessive cell proliferation, such as cancer and neointima hyperplasia. The stability and cellular localization of Skp2 are regulated by Akt, but the molecular mechanisms underlying these effects remain only partly understood. The scaffolding protein Ezrin-Binding Phosphoprotein of 50 kDa (EBP50) contains two PDZ domains and plays a critical role in the development of neointimal hyperplasia. Here we report that EBP50 directly binds Skp2 via its first PDZ domain. Moreover, EBP50 is phosphorylated by Akt on Thr-156 within the second PDZ domain, an event that allosterically promotes binding to Skp2. The interaction with EBP50 causes cytoplasmic localization of Skp2, increases Skp2 stability and promotes proliferation of primary vascular smooth muscle cells. Collectively, these studies define a novel regulatory mechanism contributing to aberrant cell growth and highlight the importance of scaffolding function of EBP50 in Akt-dependent cell proliferation.
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Affiliation(s)
- Gyun Jee Song
- From the Department of Pharmacology and Chemical Biology, Department of Pharmacology, Brain Science and Engineering Institute, School of Medicine, Kungpook National University, Daegu 702-701, Korea, and
| | | | - Stacey Barrick
- From the Department of Pharmacology and Chemical Biology
| | | | | | | | - Noah Peyser
- From the Department of Pharmacology and Chemical Biology
| | - Bin Wang
- From the Department of Pharmacology and Chemical Biology
| | - Maria Pellegrini
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755
| | - Philip M Bauer
- Vascular Medicine Institute, and Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15260
| | | | - Dale F Mierke
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755
| | - Alessandro Bisello
- From the Department of Pharmacology and Chemical Biology, Vascular Medicine Institute, and
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12
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Abstract
PURPOSE OF THE REVIEW The epidermal growth factor receptor (EGFR) is a receptor tyrosine kinase with a wide implication in tumor biology, wound healing and development. Besides acting as a growth factor receptor activated by ligands such as EGF, the EGFR can also be transactivated and thereby mediate cross-talk with different signaling pathways. The aim of this review is to illustrate the Janus-faced function of the EGFR in the vasculature with its relevance for vascular biology and disease. RECENT FINDINGS Over recent years, the number of identified signaling partners of the EGFR has steadily increased, as have the biological processes in which the EGFR is thought to be involved. Recently, new models have allowed investigation of EGFR effects in vivo, shedding some light on the overall function of the EGFR in the vasculature. At the same time, EGFR inhibitors and antibodies have become increasingly established in cancer therapy, providing potential therapeutic tools for decreasing EGFR signaling. SUMMARY The EGFR is a versatile signaling pathway integrator associated with vascular homeostasis and disease. In addition to modulating basal vascular tone and tissue homeostasis, the EGFR also seems to be involved in proinflammatory, proliferative, migratory and remodeling processes, with enhanced deposition of extracellular matrix components, thereby promoting vascular diseases such as hypertension or atherosclerosis.
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13
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Lv L, Meng Q, Ye M, Wang P, Xue G. STAT4 deficiency protects against neointima formation following arterial injury in mice. J Mol Cell Cardiol 2014; 74:284-94. [PMID: 24933129 DOI: 10.1016/j.yjmcc.2014.06.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 06/04/2014] [Accepted: 06/06/2014] [Indexed: 12/29/2022]
Abstract
Signal transducer and activator of transcription 4 (STAT4) has been associated with susceptibility to autoimmune diseases. Intriguingly, we previously reported that STAT4 might play a critical role in vascular smooth muscle cell (VSMC) proliferation. The present study therefore investigated the impact of STAT4 on VSMC migration, apoptosis and neointimal hyperplasia postinjury, as well as the underlying mechanisms. Guide-wire injury was associated with development of intimal neointima, STAT4 and phosphorylated STAT4 (p-STAT4) expressions were apparently up-regulated in the injured arteries. Neointima was greatly blocked in STAT4 knockout (KO) mice compared with wild type (WT) mice. A marked loss of inflammatory cells was identified in the vasculature postinjury in STAT4 KO mice. VSMC apoptosis was enhanced in the vasculature postinjury in STAT4 KO mice compared with WT mice. Cultured primary STAT4 KO VSMCs displayed reduced migration in comparison with WT controls. Mechanically, the deletion of STAT4 potently decreased the level of MCP-1, and its downstream targets MMP1 and MMP2. The effect of STAT4 on VSMC apoptosis was mainly mediated by the activation of the mitochondrial apoptotic pathway, as manifested by increased cytochrome c release and the activation of caspase-3. STAT4 therefore represents a promising molecular target to limit restenosis after artery intervention.
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Affiliation(s)
- Lei Lv
- Department of Vascular Surgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, China
| | - Qiurong Meng
- Department of Vascular Surgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, China
| | - Meng Ye
- Department of Vascular Surgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, China
| | - Peng Wang
- Department of Vascular Surgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, China.
| | - Guanhua Xue
- Department of Vascular Surgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, China
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14
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Boratkó A, Csortos C. NHERF2 is crucial in ERM phosphorylation in pulmonary endothelial cells. Cell Commun Signal 2013; 11:99. [PMID: 24364877 PMCID: PMC3880038 DOI: 10.1186/1478-811x-11-99] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Accepted: 12/03/2013] [Indexed: 11/10/2022] Open
Abstract
Background EBP50 and NHERF2 adaptor proteins are incriminated in various signaling pathways of the cell. They can bind ERM proteins and mediate ERM-membrane protein interactions. Results Binding of ERM to EBP50 and NHERF2 was compared in pulmonary artery endothelial cells by immunoprecipitation. NHERF2 associates with all three ERM, but EBP50 appeared to be a weak binding partner if at all. Furthermore, we detected co-localization of NHERF2 and phospho-ERM at the cell membrane and in the filopodia of dividing cells. Silencing of NHERF2 prevented agonist or angiogenesis induced phosphorylation of ERM, while overexpression of the adaptor elevated the phosphorylation level of ERM, likely catalyzed by Rho kinase 2, which co-immunoprecipitated with NHERF2/ERM in control EC, but did not bind to ERM in NHERF2 depleted cells. Dependence of ERM phosphorylation on NHERF2 was also shown in Matrigel tube formation assay, and NHERF2 was proved to be important in angiogenesis as well. Furthermore, when NHERF2 was depleted or cells were overexpressing a mutant form of NHERF2 unable to bind ERM, we found attenuated cell attachment with ECIS measurements, while it was supported by overexpression of wild type NHERF2. Conclusions Pivotal role of NHERF2 in the phosphorylation process of ERM in pulmonary artery endothelial cells is shown. We propose that NHERF2 provides a common anchoring surface for ERM and Rho kinase 2. Our results demonstrate the essential role of NHERF2 in endothelial cell adhesion/migration and angiogenesis.
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Affiliation(s)
| | - Csilla Csortos
- Department of Medical Chemistry, University of Debrecen Medical and Health Science Center, Egyetem tér 1, Debrecen H-4032, Hungary.
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Leslie KL, Song GJ, Barrick S, Wehbi VL, Vilardaga JP, Bauer PM, Bisello A. Ezrin-radixin-moesin-binding phosphoprotein 50 (EBP50) and nuclear factor-κB (NF-κB): a feed-forward loop for systemic and vascular inflammation. J Biol Chem 2013; 288:36426-36. [PMID: 24196963 DOI: 10.1074/jbc.m113.483339] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The interaction between vascular cells and macrophages is critical during vascular remodeling. Here we report that the scaffolding protein, ezrin-binding phosphoprotein 50 (EBP50), is a central regulator of macrophage and vascular smooth muscle cells (VSMC) function. EBP50 is up-regulated in intimal VSMC following endoluminal injury and promotes neointima formation. However, the mechanisms underlying these effects are not fully understood. Because of the fundamental role that inflammation plays in vascular diseases, we hypothesized that EBP50 mediates macrophage activation and the response of vessels to inflammation. Indeed, EBP50 expression increased in primary macrophages and VSMC, and in the aorta of mice, upon treatment with LPS or TNFα. This increase was nuclear factor-κB (NF-κB)-dependent. Conversely, activation of NF-κB was impaired in EBP50-null VSMC and macrophages. We found that inflammatory stimuli promote the formation of an EBP50-PKCζ complex at the cell membrane that induces NF-κB signaling. Macrophage activation and vascular inflammation after acute LPS treatment were reduced in EBP50-null cells and mice as compared with WT. Furthermore, macrophage recruitment to vascular lesions was significantly reduced in EBP50 knock-out mice. Thus, EBP50 and NF-κB participate in a feed-forward loop leading to increased macrophage activation and enhanced response of vascular cells to inflammation.
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