1
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Dolgova N, Uhlemann EME, Boniecki MT, Vizeacoumar FS, Ara A, Nouri P, Ralle M, Tonelli M, Abbas SA, Patry J, Elhasasna H, Freywald A, Vizeacoumar FJ, Dmitriev OY. MEMO1 binds iron and modulates iron homeostasis in cancer cells. eLife 2024; 13:e86354. [PMID: 38640016 PMCID: PMC11081632 DOI: 10.7554/elife.86354] [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: 01/21/2023] [Accepted: 04/15/2024] [Indexed: 04/20/2024] Open
Abstract
Mediator of ERBB2-driven cell motility 1 (MEMO1) is an evolutionary conserved protein implicated in many biological processes; however, its primary molecular function remains unknown. Importantly, MEMO1 is overexpressed in many types of cancer and was shown to modulate breast cancer metastasis through altered cell motility. To better understand the function of MEMO1 in cancer cells, we analyzed genetic interactions of MEMO1 using gene essentiality data from 1028 cancer cell lines and found multiple iron-related genes exhibiting genetic relationships with MEMO1. We experimentally confirmed several interactions between MEMO1 and iron-related proteins in living cells, most notably, transferrin receptor 2 (TFR2), mitoferrin-2 (SLC25A28), and the global iron response regulator IRP1 (ACO1). These interactions indicate that cells with high-MEMO1 expression levels are hypersensitive to the disruptions in iron distribution. Our data also indicate that MEMO1 is involved in ferroptosis and is linked to iron supply to mitochondria. We have found that purified MEMO1 binds iron with high affinity under redox conditions mimicking intracellular environment and solved MEMO1 structures in complex with iron and copper. Our work reveals that the iron coordination mode in MEMO1 is very similar to that of iron-containing extradiol dioxygenases, which also display a similar structural fold. We conclude that MEMO1 is an iron-binding protein that modulates iron homeostasis in cancer cells.
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Affiliation(s)
- Natalia Dolgova
- Department of Biochemistry, Microbiology and Immunology, University of SaskatchewanSaskatoonCanada
| | - Eva-Maria E Uhlemann
- Department of Biochemistry, Microbiology and Immunology, University of SaskatchewanSaskatoonCanada
| | - Michal T Boniecki
- Protein Characterization and Crystallization Facility, University of SaskatchewanSaskatoonCanada
| | | | - Anjuman Ara
- Department of Biochemistry, Microbiology and Immunology, University of SaskatchewanSaskatoonCanada
| | - Paria Nouri
- Department of Biochemistry, Microbiology and Immunology, University of SaskatchewanSaskatoonCanada
| | - Martina Ralle
- Department of Molecular and Medical Genetics, Oregon Health and Sciences UniversityPortlandUnited States
| | - Marco Tonelli
- National Magnetic Resonance Facility at Madison (NMRFAM), University of WisconsinMadisonUnited States
| | - Syed A Abbas
- Department of Biochemistry, Microbiology and Immunology, University of SaskatchewanSaskatoonCanada
| | - Jaala Patry
- Department of Biochemistry, Microbiology and Immunology, University of SaskatchewanSaskatoonCanada
| | - Hussain Elhasasna
- Department of Pathology and Laboratory Medicine, University of SaskatchewanSaskatoonCanada
| | - Andrew Freywald
- Department of Pathology and Laboratory Medicine, University of SaskatchewanSaskatoonCanada
| | - Franco J Vizeacoumar
- Cancer Research Department, Saskatchewan Cancer AgencySaskatoonCanada
- Division of Oncology, University of SaskatchewanSaskatoonCanada
| | - Oleg Y Dmitriev
- Department of Biochemistry, Microbiology and Immunology, University of SaskatchewanSaskatoonCanada
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2
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Kiel M, Wuebker S, Remy M, Riemondy K, Smith F, Carey C, Williams T, Van Otterloo E. MEMO1 Is Required for Ameloblast Maturation and Functional Enamel Formation. J Dent Res 2023; 102:1261-1271. [PMID: 37475472 PMCID: PMC11066519 DOI: 10.1177/00220345231185758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/22/2023] Open
Abstract
Coordinated mineralization of soft tissue is central to organismal form and function, while dysregulated mineralization underlies several human pathologies. Oral epithelial-derived ameloblasts are polarized, secretory cells responsible for generating enamel, the most mineralized substance in the human body. Defects in ameloblast development result in enamel anomalies, including amelogenesis imperfecta. Identifying proteins critical in ameloblast development can provide insight into specific pathologies associated with enamel-related disorders or, more broadly, mechanisms of mineralization. Previous studies identified a role for MEMO1 in bone mineralization; however, whether MEMO1 functions in the generation of additional mineralized structures remains unknown. Here, we identify a critical role for MEMO1 in enamel mineralization. First, we show that Memo1 is expressed in ameloblasts and, second, that its conditional deletion from ameloblasts results in enamel defects, characterized by a decline in mineral density and tooth integrity. Histology revealed that the mineralization defects in Memo1 mutant ameloblasts correlated with a disruption in ameloblast morphology. Finally, molecular profiling of ameloblasts and their progenitors in Memo1 oral epithelial mutants revealed a disruption to cytoskeletal-associated genes and a reduction in late-stage ameloblast markers, relative to controls. Collectively, our findings integrate MEMO1 into an emerging network of molecules important for ameloblast development and provide a system to further interrogate the relationship of cytoskeletal and amelogenesis-related defects.
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Affiliation(s)
- M. Kiel
- Iowa Institute for Oral Health Research, University of Iowa, College of Dentistry & Dental Clinics, Iowa City, IA, USA
- Department of Anatomy and Cell Biology, University of Iowa, Carver College of Medicine, Iowa City, IA, USA
| | - S. Wuebker
- Iowa Institute for Oral Health Research, University of Iowa, College of Dentistry & Dental Clinics, Iowa City, IA, USA
- Department of Anatomy and Cell Biology, University of Iowa, Carver College of Medicine, Iowa City, IA, USA
| | - M.T. Remy
- Iowa Institute for Oral Health Research, University of Iowa, College of Dentistry & Dental Clinics, Iowa City, IA, USA
- Roy J. Carver Department of Biomedical Engineering, College of Engineering, University of Iowa, Iowa City, IA, USA
| | - K.A. Riemondy
- RNA Bioscience Initiative, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - F. Smith
- Department of Craniofacial Biology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - C.M. Carey
- Department of Craniofacial Biology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - T. Williams
- Department of Craniofacial Biology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
- Department of Cell and Developmental Biology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
- Department of Pediatrics, University of Colorado Anschutz Medical Campus, Children’s Hospital Colorado, Aurora, CO, USA
| | - E. Van Otterloo
- Iowa Institute for Oral Health Research, University of Iowa, College of Dentistry & Dental Clinics, Iowa City, IA, USA
- Department of Anatomy and Cell Biology, University of Iowa, Carver College of Medicine, Iowa City, IA, USA
- Department of Periodontics, University of Iowa, College of Dentistry & Dental Clinics, Iowa City, IA, USA
- The University of Iowa Craniofacial Anomalies Research Center, University of Iowa, Iowa City, IA, USA
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3
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Dimke H, Griveau C, Ling WME, Brideau G, Cheval L, Muthan P, Müller D, Al-Shebel A, Houillier P, Prot-Bertoye C. Claudin-19 localizes to the thick ascending limb where its expression is required for junctional claudin-16 localization. Ann N Y Acad Sci 2023; 1526:126-137. [PMID: 37344378 DOI: 10.1111/nyas.15014] [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] [Indexed: 06/23/2023]
Abstract
The kidney is critical for mineral homeostasis. Calcium and magnesium reabsorption in the renal thick ascending limb (TAL) involves claudin-16 (CLDN16) and claudin-19 (CLDN19) and pathogenic variants in either gene lead to familial hypomagnesemia with hypercalciuria and nephrocalcinosis (FHHNC) with severe calcium and magnesium wasting. While both CLDN16 and CLDN19 localize to the TAL, varying expression patterns in the renal tubule have been reported using different antibodies. We, therefore, studied the localization of CLDN19 in the kidneys of wild-type and Cldn19-deleted mice using three anti-CLDN19 antibodies and examined the role of Cldn19 deletion on CLDN16 and CLDN10 localization. We find that CLDN19 localizes to basolateral membrane domains of the medullary and cortical TAL but only to the tight junction of TALs in the outer stripe of outer medulla and cortex, where it colocalizes with CLDN16. Furthermore, in TALs from Cldn19-deleted mice, CLDN16 is expressed in basolateral membrane domains but not at the tight junction. In contrast, Cldn19 ablation does not change CLDN10 localization. These findings directly implicate CLDN19 in regulating permeability in the TAL by allowing junctional insertion of CLDN16 and may explain the shared renal phenotypic characteristics in FHHNC patients.
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Affiliation(s)
- Henrik Dimke
- Department of Cardiovascular and Renal Research, University of Southern Denmark, Odense, Denmark
- Department of Nephrology, Odense University Hospital, Odense, Denmark
| | - Camille Griveau
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, Université Paris Cité, Paris, France
- CNRS EMR 8228 - Laboratoire de Physiologie Rénale et Tubulopathies, Paris, France
| | - Wung-Man Evelyne Ling
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, Université Paris Cité, Paris, France
- CNRS EMR 8228 - Laboratoire de Physiologie Rénale et Tubulopathies, Paris, France
| | - Gaelle Brideau
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, Université Paris Cité, Paris, France
- CNRS EMR 8228 - Laboratoire de Physiologie Rénale et Tubulopathies, Paris, France
| | - Lydie Cheval
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, Université Paris Cité, Paris, France
- CNRS EMR 8228 - Laboratoire de Physiologie Rénale et Tubulopathies, Paris, France
| | - Pravina Muthan
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, Université Paris Cité, Paris, France
- CNRS EMR 8228 - Laboratoire de Physiologie Rénale et Tubulopathies, Paris, France
| | - Dominik Müller
- Division of Gastroenterology, Nephrology and Metabolic Diseases, Department of Pediatrics, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Amr Al-Shebel
- Division of Gastroenterology, Nephrology and Metabolic Diseases, Department of Pediatrics, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Pascal Houillier
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, Université Paris Cité, Paris, France
- CNRS EMR 8228 - Laboratoire de Physiologie Rénale et Tubulopathies, Paris, France
- Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges Pompidou, Service de Physiologie, Paris, France
- Centre de Référence des Maladies Rénales Héréditaires de l'Enfant et de l'Adulte (MARHEA), Paris, France
- Centre de Référence des Maladies Rares du Calcium et du Phosphate, Paris, France
| | - Caroline Prot-Bertoye
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, Université Paris Cité, Paris, France
- CNRS EMR 8228 - Laboratoire de Physiologie Rénale et Tubulopathies, Paris, France
- Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges Pompidou, Service de Physiologie, Paris, France
- Centre de Référence des Maladies Rénales Héréditaires de l'Enfant et de l'Adulte (MARHEA), Paris, France
- Centre de Référence des Maladies Rares du Calcium et du Phosphate, Paris, France
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4
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Bartos K, Moor MB. FGFR regulator Memo1 is dispensable for FGF23 expression by osteoblasts during folic acid-driven kidney injury. Physiol Rep 2023; 11:e15650. [PMID: 36967231 PMCID: PMC10040316 DOI: 10.14814/phy2.15650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 03/04/2023] [Accepted: 03/07/2023] [Indexed: 03/28/2023] Open
Abstract
Loss of the mediator Of cell motility 1 (Memo1) in mice caused kidney disease and a bone disease with diminished osteoblast and osteoclast biomarkers in serum, resembling alterations occurring in adynamic bone disease in humans with chronic kidney disease or in Klotho-deficient mice. Here, we investigated whether Memo1 expression in osteoblasts is required for normal bone structure and FGF23 expression. We deleted Memo1 in the osteoblast-osteocyte lineage in Memo fl/fl mice using a Cre under Col1a1 promotor to obtain osteoblast-specific knockout (obKO) mice. We studied organs by micro-computed tomography, qPCR, and western blot. We challenged mice with folic acid for acute kidney injury (AKI) and analyzed organs. Memo obKO were viable without changes in gross anatomy, serum electrolytes, or circulating FGF23 concentrations compared to controls. Memo1 expression was blunted in bones of Memo obKO, whereas it remained unchanged in other organs. Micro-CT revealed no differences between genotypes in bone structure of vertebrae, femur, and tibia. During AKI, Fgf23 expression in calvaria, and renal transcriptional changes were comparable between genotypes. However, renal injury marker expression, circulating FGF23, and parathyroid hormone revealed a sex difference with more severely affected females than males of either genotype. The present data imply that Memo1 in osteoblasts is dispensable for bone structure and expression of Fgf23. Moreover, we found evidence of potential sex differences in murine folic acid nephropathy similar to other experimental models of renal injury that are important to consider when using this experimental model of renal injury.
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Affiliation(s)
- Katalin Bartos
- Department of Nephrology and HypertensionBern University HospitalBernSwitzerland
- Department of Biomedical ResearchUniversity of BernBernSwitzerland
- National Center of Competence in Research (NCCR) Kidney Control of Homeostasis (Kidney.CH), University of ZurichZurichSwitzerland
| | - Matthias B. Moor
- Department of Nephrology and HypertensionBern University HospitalBernSwitzerland
- Department of Biomedical ResearchUniversity of BernBernSwitzerland
- National Center of Competence in Research (NCCR) Kidney Control of Homeostasis (Kidney.CH), University of ZurichZurichSwitzerland
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5
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Pou Casellas C, Rookmaaker MB, Verhaar MC. Controlling cellular plasticity to improve in vitro models for kidney regeneration. CURRENT OPINION IN BIOMEDICAL ENGINEERING 2021. [DOI: 10.1016/j.cobme.2021.100345] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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6
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Prot-Bertoye C, Griveau C, Skjødt K, Cheval L, Brideau G, Lievre L, Ferriere E, Arbaretaz F, Garbin K, Zamani R, Marcussen N, Figueres L, Breiderhoff T, Muller D, Bruneval P, Houillier P, Dimke H. Differential localization patterns of claudin 10, 16, and 19 in human, mouse, and rat renal tubular epithelia. Am J Physiol Renal Physiol 2021; 321:F207-F224. [PMID: 34151590 DOI: 10.1152/ajprenal.00579.2020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Functional properties of the paracellular pathway depend critically on the set of claudins (CLDN) expressed at the tight junction. Two syndromes are causally linked to loss-of-function mutations of claudins: hypohidrosis, electrolyte imbalance, lacrimal gland dysfunction, ichthyosis, and xerostomia (HELIX) syndrome caused by genetic variations in the CLDN10 gene and familial hypomagnesemia with hypercalciuria and nephrocalcinosis caused by genetic variations in the CLDN16 or CLDN19 genes. All three genes are expressed in the kidney, particularly in the thick ascending limb (TAL). However, localization of these claudins in humans and rodents remains to be delineated in detail. We studied the segmental and subcellular expression of CLDN10, CLDN16, and CLDN19 in both paraffin-embedded and frozen kidney sections from the adult human, mouse, and rat using immunohistochemistry and immunofluorescence, respectively. Here, CLDN10 was present in a subset of medullary and cortical TAL cells, localizing to basolateral domains and tight junctions in human and rodent kidneys. Weak expression was detected at the tight junction of proximal tubular cells. CLDN16 was primarily expressed in a subset of TAL cells in the cortex and outer stripe of outer medulla, restricted to basolateral domains and tight junctional structures in both human and rodent kidneys. CLDN19 predominantly colocalized with CLDN16 in tight junctions and basolateral domains of the TAL but was also found in basolateral and junctional domains in more distal sites. CLDN10 expression at tight junctions almost never overlapped with that of CLND16 and CLDN19, consistent with distinct junctional pathways with different permeation profiles in both human and rodent kidneys.NEW & NOTEWORTHY This study used immunohistochemistry and immunofluorescence to investigate the distribution of claudin 10, 16, and 19 in the human, mouse, and rat kidney. The findings showed distinct junctional pathways in both human and rodent kidneys, supporting the existence of different permeation profiles in all species investigated.
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Affiliation(s)
- Caroline Prot-Bertoye
- Centre de Recherche des Cordeliers, Institut National de la Santé et de la Recherche Médicale, Sorbonne Université, Université de Paris, Paris, France.,Centre National de la Recherche Scientifique, ERL 8228-Laboratoire de Physiologie Rénale et Tubulopathies, Paris, France.,Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges Pompidou, Service de Physiologie, Paris, France.,Centre de Référence des Maladies Rénales Héréditaires de l'Enfant et de l'Adulte, Paris, France.,Centre de Référence des Maladies Rares du Calcium et du Phosphate, Paris, France
| | - Camille Griveau
- Centre de Recherche des Cordeliers, Institut National de la Santé et de la Recherche Médicale, Sorbonne Université, Université de Paris, Paris, France.,Centre National de la Recherche Scientifique, ERL 8228-Laboratoire de Physiologie Rénale et Tubulopathies, Paris, France
| | - Karsten Skjødt
- Department of Cancer and Inflammation, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Lydie Cheval
- Centre de Recherche des Cordeliers, Institut National de la Santé et de la Recherche Médicale, Sorbonne Université, Université de Paris, Paris, France.,Centre National de la Recherche Scientifique, ERL 8228-Laboratoire de Physiologie Rénale et Tubulopathies, Paris, France
| | - Gaëlle Brideau
- Centre de Recherche des Cordeliers, Institut National de la Santé et de la Recherche Médicale, Sorbonne Université, Université de Paris, Paris, France.,Centre National de la Recherche Scientifique, ERL 8228-Laboratoire de Physiologie Rénale et Tubulopathies, Paris, France
| | - Loïc Lievre
- Centre de Recherche des Cordeliers, Institut National de la Santé et de la Recherche Médicale, Sorbonne Université, Université de Paris, Paris, France.,Centre National de la Recherche Scientifique, ERL 8228-Laboratoire de Physiologie Rénale et Tubulopathies, Paris, France
| | - Elsa Ferriere
- Centre de Recherche des Cordeliers, Institut National de la Santé et de la Recherche Médicale, Sorbonne Université, Université de Paris, Paris, France.,Centre National de la Recherche Scientifique, ERL 8228-Laboratoire de Physiologie Rénale et Tubulopathies, Paris, France
| | - Floriane Arbaretaz
- Centre d'Histologie, d'Imagerie et de Cytométrie, Centre de Recherche des Cordeliers, Institut National de la Santé et de la Recherche Médicale, Sorbonne Université, Université de Paris, Paris, France
| | - Kevin Garbin
- Centre d'Histologie, d'Imagerie et de Cytométrie, Centre de Recherche des Cordeliers, Institut National de la Santé et de la Recherche Médicale, Sorbonne Université, Université de Paris, Paris, France
| | - Reza Zamani
- Department of Urology, Odense University Hospital, Odense, Denmark
| | - Niels Marcussen
- Department of Clinical Pathology, Odense University Hospital, Odense, Denmark
| | - Lucile Figueres
- Centre de Recherche des Cordeliers, Institut National de la Santé et de la Recherche Médicale, Sorbonne Université, Université de Paris, Paris, France.,Centre National de la Recherche Scientifique, ERL 8228-Laboratoire de Physiologie Rénale et Tubulopathies, Paris, France
| | - Tilman Breiderhoff
- Division of Gastroenterology, Nephrology and Metabolic Diseases, Department of Pediatrics, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Dominik Muller
- Division of Gastroenterology, Nephrology and Metabolic Diseases, Department of Pediatrics, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Patrick Bruneval
- Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges Pompidou, Service d'Anatomopathologie, Paris, France
| | - Pascal Houillier
- Centre de Recherche des Cordeliers, Institut National de la Santé et de la Recherche Médicale, Sorbonne Université, Université de Paris, Paris, France.,Centre National de la Recherche Scientifique, ERL 8228-Laboratoire de Physiologie Rénale et Tubulopathies, Paris, France.,Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges Pompidou, Service de Physiologie, Paris, France.,Centre de Référence des Maladies Rénales Héréditaires de l'Enfant et de l'Adulte, Paris, France.,Centre de Référence des Maladies Rares du Calcium et du Phosphate, Paris, France
| | - Henrik Dimke
- Department of Cardiovascular and Renal Research, University of Southern Denmark, Odense, Denmark.,Department of Nephrology, Odense University Hospital, Odense, Denmark
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7
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Labrecque CL, Hilton CN, Airas J, Blake A, Rubenstein KJ, Parish CA, Pollock JA. Identification of Phenazine-Based MEMO1 Small-Molecule Inhibitors: Virtual Screening, Fluorescence Polarization Validation, and Inhibition of Breast Cancer Migration. ChemMedChem 2021; 16:1163-1171. [PMID: 33332774 DOI: 10.1002/cmdc.202000797] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 12/15/2020] [Indexed: 11/10/2022]
Abstract
Phosphorylation-dependent protein-protein interactions play a significant role in biological signaling pathways; therefore, small molecules that are capable of influencing these interactions can be valuable research tools and have potential as pharmaceutical agents. MEMO1 (mediator of ErbB2-cell driven motility) is a phosphotyrosine-binding protein that interacts with a variety of protein partners and has been found to be upregulated in breast cancer patients. Herein, we report the first small-molecule inhibitors of MEMO1 interactions identified through a virtual screening platform and validated in a competitive fluorescence polarization assay. Initial structure-activity relationships have been investigated for these phenazine-core inhibitors and the binding sites have been postulated using molecular dynamics simulations. The most potent biochemical inhibitor is capable of disrupting the large protein interface with a KI of 2.7 μm. In addition, the most promising phenazine core compounds slow the migration of breast cancer cell lines in a scratch assay.
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Affiliation(s)
- Courtney L Labrecque
- Department of Chemistry, University of Richmond, 138 UR Drive, Richmond, VA 23173, USA
| | - Cassidy N Hilton
- Department of Chemistry, University of Richmond, 138 UR Drive, Richmond, VA 23173, USA
| | - Justin Airas
- Department of Chemistry, University of Richmond, 138 UR Drive, Richmond, VA 23173, USA
| | - Alexis Blake
- Department of Chemistry, University of Richmond, 138 UR Drive, Richmond, VA 23173, USA
| | - Kristen J Rubenstein
- Department of Chemistry, University of Richmond, 138 UR Drive, Richmond, VA 23173, USA
| | - Carol A Parish
- Department of Chemistry, University of Richmond, 138 UR Drive, Richmond, VA 23173, USA
| | - Julie A Pollock
- Department of Chemistry, University of Richmond, 138 UR Drive, Richmond, VA 23173, USA
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8
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Finding MEMO-Emerging Evidence for MEMO1's Function in Development and Disease. Genes (Basel) 2020; 11:genes11111316. [PMID: 33172038 PMCID: PMC7694686 DOI: 10.3390/genes11111316] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 10/29/2020] [Accepted: 10/30/2020] [Indexed: 11/24/2022] Open
Abstract
Although conserved throughout animal kingdoms, the protein encoded by the gene Mediator of ERBB2 Driven Cell Motility 1 or MEMO1, has only recently come into focus. True to its namesake, MEMO1 first emerged from a proteomic screen of molecules bound to the ERBB2 receptor and was found to be necessary for efficient cell migration upon receptor activation. While initially placed within the context of breast cancer metastasis—a pathological state that has provided tremendous insight into MEMO1′s cellular roles—MEMO1′s function has since expanded to encompass additional cancer cell types, developmental processes during embryogenesis and homeostatic regulation of adult organ systems. Owing to MEMO1′s deep conservation, a variety of model organisms have been amenable to uncovering biological facets of this multipurpose protein; facets ranging from the cellular (e.g., receptor signaling, cytoskeletal regulation, redox flux) to the organismal (e.g., mineralization and mineral homeostasis, neuro/gliogenesis, vasculogenesis) level. Although these facets emerge at the intersection of numerous biological and human disease processes, how and if they are interconnected remains to be resolved. Here, we review our current understanding of this ‘enigmatic’ molecule, its role in development and disease and open questions emerging from these previous studies.
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9
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Moor MB, Ramakrishnan SK, Legrand F, Bachtler M, Koesters R, Hynes NE, Pasch A, Bonny O. Elevated serum magnesium lowers calcification propensity in Memo1-deficient mice. PLoS One 2020; 15:e0236361. [PMID: 32706793 PMCID: PMC7380890 DOI: 10.1371/journal.pone.0236361] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Accepted: 07/03/2020] [Indexed: 11/18/2022] Open
Abstract
MEdiator of cell MOtility1 (MEMO1) is a ubiquitously expressed redox protein involved in extracellular ligand-induced cell signaling. We previously reported that inducible whole-body Memo1 KO (cKO) mice displayed a syndrome of premature aging and disturbed mineral metabolism partially recapitulating the phenotype observed in Klotho or Fgf23-deficient mouse models. Here, we aimed at delineating the contribution of systemic mineral load on the Memo1 cKO mouse phenotype. We attempted to rescue the Memo1 cKO phenotype by depleting phosphate or vitamin D from the diet, but did not observe any effect on survival. However, we noticed that, by contrast to Klotho or Fgf23-deficient mouse models, Memo1 cKO mice did not present any soft-tissue calcifications and displayed even a decreased serum calcification propensity. We identified higher serum magnesium levels as the main cause of protection against calcifications. Expression of genes encoding intestinal and renal magnesium channels and the regulator epidermal growth factor were increased in Memo1 cKO. In order to check whether magnesium reabsorption in the kidney alone was driving the higher magnesemia, we generated a kidney-specific Memo1 KO (kKO) mouse model. Memo1 kKO mice also displayed higher magnesemia and increased renal magnesium channel gene expression. Collectively, these data identify MEMO1 as a novel regulator of magnesium homeostasis and systemic calcification propensity, by regulating expression of the main magnesium channels.
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Affiliation(s)
- Matthias B. Moor
- Department of Medical Biosciences, University of Lausanne, Lausanne, Switzerland
- The National Centre of Competence in Research (NCCR) "Kidney.CH - Kidney Control of Homeostasis", Zürich, Switzerland
| | - Suresh K. Ramakrishnan
- Department of Medical Biosciences, University of Lausanne, Lausanne, Switzerland
- The National Centre of Competence in Research (NCCR) "Kidney.CH - Kidney Control of Homeostasis", Zürich, Switzerland
| | - Finola Legrand
- Department of Medical Biosciences, University of Lausanne, Lausanne, Switzerland
| | - Matthias Bachtler
- Calciscon AG, Nidau, Switzerland and Institute for Physiology and Pathophysiology, Johannes Kepler University Linz, Linz, Austria
| | - Robert Koesters
- Department of Nephrology, Hôpital Tenon, Université Pierre et Marie Curie, Paris, France
| | - Nancy E. Hynes
- Friedrich Miescher Institute for Biomedical Research and University of Basel, Basel, Switzerland
| | - Andreas Pasch
- Calciscon AG, Nidau, Switzerland and Institute for Physiology and Pathophysiology, Johannes Kepler University Linz, Linz, Austria
| | - Olivier Bonny
- Department of Medical Biosciences, University of Lausanne, Lausanne, Switzerland
- The National Centre of Competence in Research (NCCR) "Kidney.CH - Kidney Control of Homeostasis", Zürich, Switzerland
- Department of Medicine, Service of Nephrology, Lausanne University Hospital, Lausanne, Switzerland
- * E-mail:
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Moor MB, Bonny O. Memo1 gene expression in kidney and bone is unaffected by dietary mineral load and calciotropic hormones. Physiol Rep 2020; 8:e14410. [PMID: 32291966 PMCID: PMC7156332 DOI: 10.14814/phy2.14410] [Citation(s) in RCA: 2] [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: 02/06/2020] [Revised: 03/07/2020] [Accepted: 03/11/2020] [Indexed: 12/20/2022] Open
Abstract
Mediator of cell motility 1 (MEMO1) is a ubiquitously expressed modulator of cellular responses to growth factors including FGF23 signaling, and Memo1-deficient mice share some phenotypic traits with Fgf23- or Klotho-deficient mouse models. Here, we tested whether Memo1 gene expression is regulated by calciotropic hormones or by changing the dietary mineral load. MLO-Y4 osteocyte-like cells were cultured and treated with 1,25(OH)2 -vitamin D3 . Wild-type C57BL/6N mice underwent treatments with 1,25(OH)2 -vitamin D3 , parathyroid hormone, 17β-estradiol or vehicle. Other cohorts of C57BL/6N mice were fed diets varying in calcium or phosphate content. Expression of Memo1 and control genes was assessed by qPCR. 1,25(OH)2 -vitamin D3 caused an acute decrease in Memo1 transcript levels in vitro, but not in vivo. None of the hormones tested had an influence on Memo1 transcripts, whereas the assessed control genes reacted the expected way. Dietary interventions with calcium and phosphate did not affect Memo1 transcripts but altered the chosen control genes' expression. We observed that Memo1 was not regulated by calciotropic hormones or change in mineral load, suggesting major differences between the regulation and physiological roles of Klotho, Fgf23, and Memo1.
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Affiliation(s)
- Matthias B. Moor
- Department of Biomedical SciencesUniversity of LausanneLausanneSwitzerland
- The National Centre of Competence in Research (NCCR) "Kidney.CH ‐ Kidney Control of Homeostasis" SwitzerlandZürichSwitzerland
- Present address:
Department of Nephrology and HypertensionBern University HospitalBernSwitzerland
| | - Olivier Bonny
- Department of Biomedical SciencesUniversity of LausanneLausanneSwitzerland
- The National Centre of Competence in Research (NCCR) "Kidney.CH ‐ Kidney Control of Homeostasis" SwitzerlandZürichSwitzerland
- Service of NephrologyDepartment of MedicineLausanne University HospitalLausanneSwitzerland
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Developmental Changes in Phosphate Homeostasis. Rev Physiol Biochem Pharmacol 2020; 179:117-138. [PMID: 33398502 DOI: 10.1007/112_2020_52] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Phosphate is a multivalent ion critical for a variety of physiological functions including bone formation, which occurs rapidly in the developing infant. In order to ensure maximal bone mineralization, young animals must maintain a positive phosphate balance. To accomplish this, intestinal absorption and renal phosphate reabsorption are greater in suckling and young animals relative to adults. This review discusses the known intestinal and renal adaptations that occur in young animals in order to achieve a positive phosphate balance. Additionally, we discuss the ontogenic changes in phosphotropic endocrine signalling as it pertains to intestinal and renal phosphate handling, including several endocrine factors not always considered in the traditional dogma of phosphotropic endocrine signalling, such as growth hormone, triiodothyronine, and glucocorticoids. Finally, a proposed model of how these factors may contribute to achieving a positive phosphate balance during development is proposed.
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12
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Liao QS, Du Q, Lou J, Xu JY, Xie R. Roles of Na +/Ca 2+ exchanger 1 in digestive system physiology and pathophysiology. World J Gastroenterol 2019; 25:287-299. [PMID: 30686898 PMCID: PMC6343099 DOI: 10.3748/wjg.v25.i3.287] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 12/20/2018] [Accepted: 12/28/2018] [Indexed: 02/06/2023] Open
Abstract
The Na+/Ca2+ exchanger (NCX) protein family is a part of the cation/Ca2+ exchanger superfamily and participates in the regulation of cellular Ca2+ homeostasis. NCX1, the most important subtype in the NCX family, is expressed widely in various organs and tissues in mammals and plays an especially important role in the physiological and pathological processes of nerves and the cardiovascular system. In the past few years, the function of NCX1 in the digestive system has received increasing attention; NCX1 not only participates in the healing process of gastric ulcer and gastric mucosal injury but also mediates the development of digestive cancer, acute pancreatitis, and intestinal absorption. This review aims to explore the roles of NCX1 in digestive system physiology and pathophysiology in order to guide clinical treatments.
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Affiliation(s)
- Qiu-Shi Liao
- Department of Gastroenterology, Affiliated Hospital to Zunyi Medical College, Zunyi 563000, Guizhou Province, China
| | - Qian Du
- Department of Gastroenterology, Affiliated Hospital to Zunyi Medical College, Zunyi 563000, Guizhou Province, China
| | - Jun Lou
- Department of Gastroenterology, Affiliated Hospital to Zunyi Medical College, Zunyi 563000, Guizhou Province, China
| | - Jing-Yu Xu
- Department of Gastroenterology, Affiliated Hospital to Zunyi Medical College, Zunyi 563000, Guizhou Province, China
| | - Rui Xie
- Department of Gastroenterology, Affiliated Hospital to Zunyi Medical College, Zunyi 563000, Guizhou Province, China
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