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Takahashi H, Ito R, Matsumura Y, Sakai J. Environmental factor reversibly determines cellular identity through opposing Integrators that unify epigenetic and transcriptional pathways. Bioessays 2024; 46:e2300084. [PMID: 38013256 DOI: 10.1002/bies.202300084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 09/29/2023] [Accepted: 11/13/2023] [Indexed: 11/29/2023]
Abstract
Organisms must adapt to environmental stresses to ensure their survival and prosperity. Different types of stresses, including thermal, mechanical, and hypoxic stresses, can alter the cellular state that accompanies changes in gene expression but not the cellular identity determined by a chromatin state that remains stable throughout life. Some tissues, such as adipose tissue, demonstrate remarkable plasticity and adaptability in response to environmental cues, enabling reversible cellular identity changes; however, the mechanisms underlying these changes are not well understood. We hypothesized that positive and/or negative "Integrators" sense environmental cues and coordinate the epigenetic and transcriptional pathways required for changes in cellular identity. Adverse environmental factors such as pollution disrupt the coordinated control contributing to disease development. Further research based on this hypothesis will reveal how organisms adapt to fluctuating environmental conditions, such as temperature, extracellular matrix stiffness, oxygen, cytokines, and hormonal cues by changing their cellular identities.
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Grants
- JP20gm1310007 Japan Agency for Medical Research and Development
- JP16H06390 Ministry of Education, Culture, Sports, Science and Technology
- JP21H04826 Ministry of Education, Culture, Sports, Science and Technology
- JP20H04835 Ministry of Education, Culture, Sports, Science and Technology
- JP20K21747 Ministry of Education, Culture, Sports, Science and Technology
- JP22K18411 Ministry of Education, Culture, Sports, Science and Technology
- JP21K21211 Ministry of Education, Culture, Sports, Science and Technology
- JP19J11909 Ministry of Education, Culture, Sports, Science and Technology
- JPMJPF2013 Japan Science and Technology Agency
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Affiliation(s)
- Hiroki Takahashi
- Division of Molecular Physiology and Metabolism, Tohoku University Graduate School of Medicine, Sendai, Japan
- Division of Metabolic Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan
| | - Ryo Ito
- Division of Molecular Physiology and Metabolism, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yoshihiro Matsumura
- Division of Molecular Physiology and Metabolism, Tohoku University Graduate School of Medicine, Sendai, Japan
- Division of Metabolic Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan
| | - Juro Sakai
- Division of Molecular Physiology and Metabolism, Tohoku University Graduate School of Medicine, Sendai, Japan
- Division of Metabolic Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan
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2
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Georgescu MM, Whipple SG, Notarianni CM. Novel neoplasms associated with syndromic pediatric medulloblastoma: integrated pathway delineation for personalized therapy. Cell Commun Signal 2022; 20:123. [PMID: 35978432 PMCID: PMC9382778 DOI: 10.1186/s12964-022-00930-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 07/05/2022] [Indexed: 11/16/2022] Open
Abstract
Medulloblastoma is the most common pediatric embryonal brain tumor, and may occur in cancer predisposition syndromes. We describe novel associations of medulloblastoma with atypical prolactinoma and dural high-grade sarcoma in Li-Fraumeni syndrome (LFS), and epidural desmoid fibromatosis in familial adenomatous polyposis (FAP)/Turcot syndrome. Genomic analysis showing XRCC3 alterations suggested radiotherapy as contributing factor to the progression of LFS-associated medulloblastoma, and demonstrated different mechanisms of APC inactivation in the FAP-associated tumors. The integrated genomic-transcriptomic analysis uncovered the growth pathways driving tumorigenesis, including the prolactin-prolactin receptor (PRLR) autocrine loop and Shh pathway in the LFS-associated prolactinoma and medulloblastoma, respectively, the Wnt pathway in both FAP-associated neoplasms, and the TGFβ and Hippo pathways in the soft tissue tumors, regardless of germline predisposition. In addition, the comparative analysis of paired syndromic neoplasms revealed several growth pathways susceptible to therapeutic intervention by PARP, PRLR, and selective receptor tyrosine kinase (RTK) inhibitors. These could target the defective DNA damage repair in the LFS-associated medulloblastoma, the prolactin autocrine loop in the atypical prolactinoma, the EPHA3/7 and ALK overexpression in the FAP-associated medulloblastoma, and the multi-RTK upregulation in the soft tissue neoplasms. This study presents the spatiotemporal evolution of novel neoplastic associations in syndromic medulloblastoma, and discusses the post-radiotherapy risk for secondary malignancies in syndromic pediatric patients, with important implications for the biology, diagnosis, and therapy of these tumors. Video Abstract.
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Affiliation(s)
| | - Stephen G Whipple
- Department of Neurosurgery, Louisiana State University Shreveport, Shreveport, LA, 71103, USA
| | - Christina M Notarianni
- Department of Neurosurgery, Louisiana State University Shreveport, Shreveport, LA, 71103, USA
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3
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Cayre S, Faraldo MM, Bardin S, Miserey-Lenkei S, Deugnier MA, Goud B. RAB6 GTPase regulates mammary secretory function by controlling the activation of STAT5. Development 2020; 147:dev.190744. [PMID: 32895290 PMCID: PMC7561474 DOI: 10.1242/dev.190744] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 08/19/2020] [Indexed: 12/11/2022]
Abstract
The Golgi-associated RAB GTPases, RAB6A and RAB6A', regulate anterograde and retrograde transport pathways from and to the Golgi. In vitro, RAB6A/A' control several cellular functions including cell division, migration, adhesion and polarity. However, their role remains poorly described in vivo Here, we generated BlgCre; Rab6a F/F mice presenting a specific deletion of Rab6a in the mammary luminal secretory lineage during gestation and lactation. Rab6a loss severely impaired the differentiation, maturation and maintenance of the secretory tissue, compromising lactation. The mutant epithelium displayed a decreased activation of STAT5, a key regulator of the lactogenic process primarily governed by prolactin. Data obtained with a mammary epithelial cell line suggested that defective STAT5 activation might originate from a perturbed transport of the prolactin receptor, altering its membrane expression and signaling cascade. Despite the major functional defects observed upon Rab6a deletion, the polarized organization of the mammary epithelial bilayer was preserved. Altogether, our data reveal a crucial role for RAB6A/A' in the lactogenic function of the mammary gland and suggest that the trafficking pathways controlled by RAB6A/A' depend on cell-type specialization and tissue context.
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Affiliation(s)
- Surya Cayre
- Department of Cell Biology and Cancer, Institut Curie, PSL Research University, Sorbonne Université, CNRS, UMR144, Paris F-75005, France
| | - Marisa M Faraldo
- Department of Cell Biology and Cancer, Institut Curie, PSL Research University, Sorbonne Université, CNRS, UMR144, Paris F-75005, France.,INSERM, Paris F-75013, France
| | - Sabine Bardin
- Department of Cell Biology and Cancer, Institut Curie, PSL Research University, Sorbonne Université, CNRS, UMR144, Paris F-75005, France
| | - Stéphanie Miserey-Lenkei
- Department of Cell Biology and Cancer, Institut Curie, PSL Research University, Sorbonne Université, CNRS, UMR144, Paris F-75005, France
| | - Marie-Ange Deugnier
- Department of Cell Biology and Cancer, Institut Curie, PSL Research University, Sorbonne Université, CNRS, UMR144, Paris F-75005, France .,INSERM, Paris F-75013, France
| | - Bruno Goud
- Department of Cell Biology and Cancer, Institut Curie, PSL Research University, Sorbonne Université, CNRS, UMR144, Paris F-75005, France
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Jeong J, Kim W, Hens J, Dann P, Schedin P, Friedman PA, Wysolmerski JJ. NHERF1 Is Required for Localization of PMCA2 and Suppression of Early Involution in the Female Lactating Mammary Gland. Endocrinology 2019; 160:1797-1810. [PMID: 31087002 PMCID: PMC6619491 DOI: 10.1210/en.2019-00230] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Accepted: 05/07/2019] [Indexed: 12/11/2022]
Abstract
Prior studies have demonstrated that the calcium pump, plasma membrane calcium ATPase 2 (PMCA2), mediates calcium transport into milk and prevents mammary epithelial cell death during lactation. PMCA2 also regulates cell proliferation and cell death in breast cancer cells, in part by maintaining the receptor tyrosine kinase ErbB2/HER2 within specialized plasma membrane domains. Furthermore, the regulation of PMCA2 membrane localization and activity in breast cancer cells requires its interaction with the PDZ domain-containing scaffolding molecule sodium-hydrogen exchanger regulatory factor (NHERF) 1. In this study, we asked whether NHERF1 also interacts with PMCA2 in normal mammary epithelial cells during lactation. Our results demonstrate that NHERF1 expression is upregulated during lactation and that it interacts with PMCA2 at the apical membrane of secretory luminal epithelial cells. Similar to PMCA2, NHERF1 expression is rapidly reduced by milk stasis after weaning. Examining lactating NHERF1 knockout (KO) mice showed that NHERF1 contributes to the proper apical location of PMCA2, for proper apical-basal polarity in luminal epithelial cells, and that it participates in the suppression of Stat3 activation and the prevention of premature mammary gland involution. Additionally, we found that PMCA2 also interacts with the closely related scaffolding molecule, NHERF2, at the apical membrane, which likely maintains PMCA2 at the plasma membrane of mammary epithelial cells in lactating NHERF1KO mice. Based on these data, we conclude that, during lactation, NHERF1 is required for the proper expression and apical localization of PMCA2, which, in turn, contributes to preventing the premature activation of Stat3 and the lysosome-mediated cell death pathway that usually occur only early in mammary involution.
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Affiliation(s)
- Jaekwang Jeong
- Section of Endocrinology and Metabolism, Department of Medicine, Yale University School of Medicine, New Haven, Connecticut
| | - Wonnam Kim
- Division of Pharmacology, College of Korean Medicine, Semyung University, Jecheon, Republic of Korea
| | - Julie Hens
- Section of Endocrinology and Metabolism, Department of Medicine, Yale University School of Medicine, New Haven, Connecticut
| | - Pamela Dann
- Section of Endocrinology and Metabolism, Department of Medicine, Yale University School of Medicine, New Haven, Connecticut
| | - Pepper Schedin
- Department of Cell, Developmental, and Cancer Biology, Oregon Health and Science University, Portland, Oregon
| | - Peter A Friedman
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - John J Wysolmerski
- Section of Endocrinology and Metabolism, Department of Medicine, Yale University School of Medicine, New Haven, Connecticut
- Correspondence: John J. Wysolmerski, MD, Section of Endocrinology and Metabolism, Department of Internal Medicine, TAC S123a, Yale University School of Medicine, 333 Cedar Street, FMT 102, Box 208020, New Haven, Connecticut 06520. E-mail:
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5
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Georgescu MM, Gagea M, Cote G. NHERF1/EBP50 Suppresses Wnt-β-Catenin Pathway-Driven Intestinal Neoplasia. Neoplasia 2017; 18:512-23. [PMID: 27566107 PMCID: PMC5018097 DOI: 10.1016/j.neo.2016.07.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Revised: 07/01/2016] [Accepted: 07/11/2016] [Indexed: 12/31/2022] Open
Abstract
NHERF1/EBP50, an adaptor molecule that interacts with β-catenin, YAP, and PTEN, has been recently implicated in the progression of various human malignancies, including colorectal cancer. We report here that NHERF1 acts as a tumor suppressor in vivo for intestinal adenoma development. NHERF1 is highly expressed at the apical membrane of mucosa intestinal epithelial cells (IECs) and serosa mesothelial cells. NHERF1-deficient mice show overall longer small intestine and colon that most likely could be attributed to a combination of defects, including altered apical brush border of absorbtive IECs and increased number of secretory IECs. NHERF1 deficiency in Apc(Min/+) mice resulted in significantly shorter animal survival due to markedly increased tumor burden. This resulted from a moderate increase of the overall tumor density, more pronounced in females than males, and a massive increase in the number of large adenomas in both genders. The analysis of possible pathways controlling tumor size showed upregulation of Wnt-β-catenin pathway, higher expression of unphosphorylated YAP, and prominent nuclear expression of cyclin D1 in NHERF1-deficient tumors. Similar YAP changes, with relative decrease of phosphorylated YAP and increase of nuclear YAP expression, were observed as early as the adenoma stages in the progression of human colorectal cancer. This study discusses a complex role of NHERF1 for intestinal morphology and presents indisputable evidence for its in vivo tumor suppressor function upstream of Wnt-β-catenin and Hippo-YAP pathways.
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Affiliation(s)
- Maria-Magdalena Georgescu
- Department of Pathology and Translational Pathobiology, Louisiana State University, Shreveport, LA, 71103, USA.
| | - Mihai Gagea
- Department of Veterinary Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Gilbert Cote
- Department of Endocrine Neoplasia and Hormonal Disorders, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
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6
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Lee S, Kelleher SL. Biological underpinnings of breastfeeding challenges: the role of genetics, diet, and environment on lactation physiology. Am J Physiol Endocrinol Metab 2016; 311:E405-22. [PMID: 27354238 PMCID: PMC5005964 DOI: 10.1152/ajpendo.00495.2015] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Accepted: 06/22/2016] [Indexed: 02/06/2023]
Abstract
Lactation is a dynamic process that has evolved to produce a complex biological fluid that provides nutritive and nonnutritive factors to the nursing offspring. It has long been assumed that once lactation is successfully initiated, the primary factor regulating milk production is infant demand. Thus, most interventions have focused on improving breastfeeding education and early lactation support. However, in addition to infant demand, increasing evidence from studies conducted in experimental animal models, production animals, and breastfeeding women suggests that a diverse array of maternal factors may also affect milk production and composition. In this review, we provide an overview of our current understanding of the role of maternal genetics and modifiable factors, such as diet and environmental exposures, on reproductive endocrinology, lactation physiology, and the ability to successfully produce milk. To identify factors that may affect lactation in women, we highlight some information gleaned from studies in experimental animal models and production animals. Finally, we highlight the gaps in current knowledge and provide commentary on future research opportunities aimed at improving lactation outcomes in breastfeeding women to improve the health of mothers and their infants.
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Affiliation(s)
- Sooyeon Lee
- Departments of Cellular and Molecular Physiology
| | - Shannon L Kelleher
- Departments of Cellular and Molecular Physiology, Pharmacology, and Surgery, Pennsylvania State Hershey College of Medicine, Hershey, Pennsylvania; and Department of Nutritional Sciences, The Pennsylvania State University, University Park, Pennsylvania
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Chien EJ, Hsu CH, Chang VHJ, Lin EPY, Kuo TPT, Chien CH, Lin HY. In human T cells mifepristone antagonizes glucocorticoid non-genomic rapid responses in terms of Na(+)/H(+)-exchange 1 activity, but not ezrin/radixin/moesin phosphorylation. Steroids 2016; 111:29-36. [PMID: 26773750 DOI: 10.1016/j.steroids.2016.01.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Accepted: 01/04/2016] [Indexed: 01/01/2023]
Abstract
Glucocorticoids (GCs) and progesterone have been employed as immunosuppressive agents during pregnancy for many years. Intracellular acidification by GCs is due to a rapid non-genomic inhibition of membrane Na(+)/H(+)-exchange 1 (NHE1) activity and is followed by immunosuppression of PHA-stimulated proliferation. NHE1 is tethered to the cortical actin cytoskeleton through ezrin/radixin/moesin (ERM) proteins within lipid rafts; these regulate cell shape, migration and resistance to apoptosis. We explored whether mifepristone (RU486), an antagonist of GCs in T cells, is able to completely block rapid non-genomic responses, namely NHE1 activity and the phosphorylation C-terminal residues of ERM proteins at threonine (cp-ERM). GCs stimulate a rapid non-genomic cp-ERM response in cells within 5min. RU486 antagonized the GC-induced rapid decrease in NHE1 activity, and arrested PHA-stimulated T cells at G0/G1 phase but had no effect on the rapid increase in cp-ERM, which persisted for 24h. However, the cp-ERM response was blocked by staurosporine in both resting and GC stimulated cells. The results of RU486 antagonized the GC induced rapid decrease in NHE1 ion transport activity, but not the increase cp-ERM. This suggests that RU486 in T cells exerts its antagonistic effects at NHE1 containing plasma membrane sites and not where cp-ERM links lipid rafts to cortical cytoskeletons.
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Affiliation(s)
- Eileen Jea Chien
- Institute and Department of Physiology, School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan, ROC; Department of Healthcare Administration, Asia University, Taichung 41354, Taiwan, ROC; Graduate Institute of Basic Medical Science, College of Medicine, China Medical University, Taichung 40402, Taiwan, ROC.
| | - Ching-Hui Hsu
- Division of Allergy-Immunology-Rheumatology, Taipei Veterans General Hospital, Taipei 11217, Taiwan, ROC
| | - Vincent Han-Jhih Chang
- Institute and Department of Physiology, School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan, ROC
| | - Enoch Pin-Yi Lin
- Institute and Department of Physiology, School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan, ROC
| | - Trista Pin-Tsun Kuo
- Institute and Department of Physiology, School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan, ROC
| | - Chau-Heng Chien
- Institute and Department of Physiology, School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan, ROC
| | - Hsiao-Yi Lin
- Department of Medicine, School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan, ROC; Division of Allergy-Immunology-Rheumatology, Taipei Veterans General Hospital, Taipei 11217, Taiwan, ROC.
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8
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Treat AC, Wheeler DS, Stolz DB, Tsang M, Friedman PA, Romero G. The PDZ Protein Na+/H+ Exchanger Regulatory Factor-1 (NHERF1) Regulates Planar Cell Polarity and Motile Cilia Organization. PLoS One 2016; 11:e0153144. [PMID: 27055101 PMCID: PMC4824468 DOI: 10.1371/journal.pone.0153144] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Accepted: 03/24/2016] [Indexed: 12/23/2022] Open
Abstract
Directional flow of the cerebrospinal fluid requires coordinated movement of the motile cilia of the ependymal epithelium that lines the cerebral ventricles. Here we report that mice lacking the Na+/H+ Exchanger Regulatory Factor 1 (NHERF1/Slc9a3r1, also known as EBP50) develop profound communicating hydrocephalus associated with fewer and disorganized ependymal cilia. Knockdown of NHERF1/slc9a3r1 in zebrafish embryos also causes severe hydrocephalus of the hindbrain and impaired ciliogenesis in the otic vesicle. Ultrastructural analysis did not reveal defects in the shape or organization of individual cilia. Similar phenotypes have been described in animals with deficiencies in Wnt signaling and the Planar Cell Polarity (PCP) pathway. We show that NHERF1 binds the PCP core genes Frizzled (Fzd) and Vangl. We further show that NHERF1 assembles a ternary complex with Fzd4 and Vangl2 and promotes translocation of Vangl2 to the plasma membrane, in particular to the apical surface of ependymal cells. Taken together, these results strongly support an important role for NHERF1 in the regulation of PCP signaling and the development of functional motile cilia.
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Affiliation(s)
- Anny Caceres Treat
- Laboratory for GPCR Biology, Department of Pharmacology & Chemical Biology, University of Pittsburgh, Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America
| | - David S Wheeler
- Laboratory for GPCR Biology, Department of Pharmacology & Chemical Biology, University of Pittsburgh, Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America.,Medical Scientist Training Program, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America
| | - Donna B Stolz
- Department of Cell Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America
| | - Michael Tsang
- Department of Developmental Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America
| | - Peter A Friedman
- Laboratory for GPCR Biology, Department of Pharmacology & Chemical Biology, University of Pittsburgh, Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America.,Department of Structural Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America
| | - Guillermo Romero
- Laboratory for GPCR Biology, Department of Pharmacology & Chemical Biology, University of Pittsburgh, Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America
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Gorvin CM. The prolactin receptor: Diverse and emerging roles in pathophysiology. JOURNAL OF CLINICAL AND TRANSLATIONAL ENDOCRINOLOGY 2015; 2:85-91. [PMID: 29204371 PMCID: PMC5685068 DOI: 10.1016/j.jcte.2015.05.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Accepted: 05/10/2015] [Indexed: 12/21/2022]
Abstract
Investigations over two decades have revised understanding of the prolactin hormone. Long thought to be merely a lactogenic hormone, its list of functions has been extended to include: reproduction, islet differentiation, adipocyte control and immune modulation. Prolactin functions by binding cell-surface expressed prolactin receptor, initiating signaling cascades, primarily utilizing Janus kinase-signal transducer and activator of transcription (JAK-STAT). Pathway disruption has been implicated in tumorigenesis, reproductive abnormalities, and diabetes. Prolactin can also be secreted from extrapituitary sources adding complexity to understanding of its physiological functions. This review aims to describe how prolactin exerts its pathophysiological roles by endocrine and autocrine means.
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Affiliation(s)
- Caroline M Gorvin
- Academic Endocrine Unit, University of Oxford, Oxford Centre for Diabetes, Endocrinology and Metabolism, Radcliffe Department of Medicine, Oxford, OX3 7LJ, UK
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10
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NHERF1/EBP50 is an organizer of polarity structures and a diagnostic marker in ependymoma. Acta Neuropathol Commun 2015; 3:11. [PMID: 25775275 PMCID: PMC4352254 DOI: 10.1186/s40478-015-0197-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Accepted: 02/18/2015] [Indexed: 12/01/2022] Open
Abstract
NHERF1/EBP50, an adaptor protein required for epithelial morphogenesis, has been implicated in the progression of various human malignancies. NHERF1-deficient mice have intestinal brush border structural defects and we report here that they also have disorganized ependymal cilia with development of non-obstructive hydrocephalus. Examination of mouse and human brain tissues revealed highest NHERF1 expression at the apical plasma membrane of ependymal cells. In ependymal tumors, NHERF1 expression was retained in polarized membrane structures, such as microlumens, rosettes and canals, where it co-localized with some of its ligands, such as moesin and PTEN. Analysis of a comprehensive panel of 113 tumors showed robust NHERF1 labeling of microlumens in 100% of ependymomas, subependymomas, and pediatric anaplastic ependymomas, and in 67% of adult anaplastic ependymomas. NHERF1 staining was present in 35% of ependymoma cases that lacked reactivity for EMA, the routine immunohistochemical marker used for ependymoma diagnosis. NHERF1 labeling of microlumens was either absent or rarely seen in other types of brain tumors analyzed, denoting NHERF1 as a reliable diagnostic marker of ependymal tumors. Anaplastic foci and a subset of adult anaplastic ependymomas showed complete absence of NHERF1-labeled polarity structures, consistent with a loss of differentiation in these aggressive tumors. These data highlight a role for NHERF1 in ependymal morphogenesis with direct application to the diagnosis of ependymal tumors.
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11
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NHERF1/EBP50 controls morphogenesis of 3D colonic glands by stabilizing PTEN and ezrin-radixin-moesin proteins at the apical membrane. Neoplasia 2015; 16:365-74.e1-2. [PMID: 24862762 DOI: 10.1016/j.neo.2014.04.004] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 04/10/2014] [Accepted: 04/14/2014] [Indexed: 11/21/2022] Open
Abstract
Na(+)/H(+) exchanger 3 regulating factor 1/ezrin-radixin-moesin (ERM)-binding phosphoprotein 50 (NHERF1/EBP50), an adaptor molecule that interacts with the ERM-neurofibromatosis type 2 family of cytoskeletal proteins through its ERM-binding region and with phosphatase and tensin homolog (PTEN) and β-catenin through its PDZ domains, has been recently implicated in the progression of various human malignancies, including colorectal cancer (CRC). We report here that NHERF1 controls gland morphogenesis, as demonstrated in three-dimensional (3D) human intestinal glands developing from a single nonpolarized cell. Starting from the early two-cell developmental stage, NHERF1 concentrates at the cellular interface in a central membrane disc that marks the apical pole delimiting the forming lumen. NHERF1 depletion leads to severe disruption of the apical-basal polarity, with formation of enlarged and distorted cell spheroids devoid of a central lumen. This characteristic and the increased number of mitoses in NHERF1-depleted spheroids, including multipolar ones, mimic high-grade dysplasia lesions observed in CRC progression. NHERF1 ERM-binding or PDZ-domain mutants fail to localize apically and impair gland formation most likely by outcompeting endogenous ligands, with the latter mutant completely aborting gland development. Examination of NHERF1 ligands showed that even if both ezrin and moesin colocalized with NHERF1 at the apical membrane, moesin but not ezrin depletion disrupted morphogenesis similarly to NHERF1. NHERF1 depletion resulted also in membrane displacement of PTEN and nuclear translocation of β-catenin, events contributing to polarity loss and increased proliferation. These findings reveal an essential role of NHERF1 in epithelial morphogenesis and polarity and validate this 3D system for modeling the molecular changes observed in CRC.
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12
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Ji M, Yuan L, Lv X, Dong W, Peng X. EBP50 regulates the apoptosis of pancreatic cancer cells by decreasing the expression levels of Bcl-2. Exp Ther Med 2014; 8:919-924. [PMID: 25120624 PMCID: PMC4113643 DOI: 10.3892/etm.2014.1831] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Accepted: 06/05/2014] [Indexed: 01/25/2023] Open
Abstract
Increasing evidence has demonstrated that ezrin-radixin-moesin (ERM)-binding phosphoprotein 50 (EBP50) is involved in the malignant transformation of numerous human cancers. The present study investigated the involvement of EBP50 overexpression in the tumorigenicity of pancreatic cancer (PC). The results revealed that overexpression of EBP50 suppressed cell growth, promoted cell apoptosis and arrested G1-to-S phase progression in two human PC cell lines. Overexpression of EBP50 also suppressed B-cell lymphoma 2 (Bcl-2) expression. Furthermore, nude mouse tumor xenograft models were established by the subcutaneous injection of cell lines stably transfected with an EBP50-expressing plasmid. The in vivo data indicated that overexpression of EBP50 inhibited the growth of the PC tumors and induced cell apoptosis. Thus, the present study demonstrated that EBP50 overexpression induces growth inhibition and apoptosis in PC by decreasing Bcl-2 expression. The results suggest that EBP50 may function as a potential tumor suppressor in vivo and in vitro.
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Affiliation(s)
- Mengyao Ji
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Lei Yuan
- Criminal Science and Technology Studio, Chongqing Banan Police Security Bureau, Chongqing, Chongqing 401320, P.R. China
| | - Xiaoguang Lv
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Weiguo Dong
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Xiulan Peng
- Department of Oncology, The Fifth Hospital of Wuhan, Wuhan 430050, P.R. China
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Chatterjee SJ, McCaffrey L. Emerging role of cell polarity proteins in breast cancer progression and metastasis. BREAST CANCER-TARGETS AND THERAPY 2014; 6:15-27. [PMID: 24648766 PMCID: PMC3929326 DOI: 10.2147/bctt.s43764] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Breast cancer is a heterogeneous group of diseases that frequently exhibits loss of growth control, and disrupted tissue organization and differentiation. Several recent studies indicate that apical–basal polarity provides a tumor-suppressive function, and that disrupting polarity proteins affects many stages of breast cancer progression from initiation through metastasis. In this review we highlight some of the recent advances in our understanding of the molecular mechanisms by which loss of apical–basal polarity deregulates apoptosis, proliferation, and promotes invasion and metastasis in breast cancer.
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Affiliation(s)
- Sudipa June Chatterjee
- Rosalind and Morris Goodman Cancer Centre, Department of Oncology, McGill University, Montreal, QC, Canada
| | - Luke McCaffrey
- Rosalind and Morris Goodman Cancer Centre, Department of Oncology, McGill University, Montreal, QC, Canada
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