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Wan H, Li J, Chen X, Sellers ZM, Dong H. Divergent roles of estrogen receptor subtypes in regulating estrogen-modulated colonic ion transports and epithelial repair. J Biol Chem 2023; 299:105068. [PMID: 37468102 PMCID: PMC10448179 DOI: 10.1016/j.jbc.2023.105068] [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: 06/12/2023] [Revised: 07/10/2023] [Accepted: 07/12/2023] [Indexed: 07/21/2023] Open
Abstract
Although it was described previously for estrogen (E2) regulation of intestinal epithelial Cl- and HCO3- secretion in sex difference, almost nothing is known about the roles of estrogen receptor (ER) subtypes in regulating E2-modulated epithelial ion transports and epithelial restitution. Here, we aimed to investigate ERα and ERβ subtypes in the regulation of E2-modulated colonic epithelial HCO3- and Cl- secretion and epithelial restitution. Through physiological and biochemical studies, in combination of genetic knockdown, we showed that ERα attenuated female colonic Cl- secretion but promoted Ca2+-dependent HCO3- secretion via store-operated calcium entry (SOCE) mechanism in mice. However, ERβ attenuated HCO3- secretion by inhibiting Ca2+via the SOCE and inhibiting cAMP via protein kinases. Moreover, ERα but not ERβ promoted epithelial cell restitution via SOCE/Ca2+ signaling. ERα also enhanced cyclin D1, proliferating cell nuclear antigen, and β-catenin expression in normal human colonic epithelial cells. All ERα-mediated biological effects could be attenuated by its selective antagonist and genetic knockdown. Finally, both ERα and ERβ were expressed in human colonic epithelial cells and mouse colonic tissues. We therefore conclude that E2 modulates complex colonic epithelial HCO3- and Cl- secretion via ER subtype-dependent mechanisms and that ERα is specifically responsible for colonic epithelial regeneration. This study provides novel insights into the molecular mechanisms of how ERα and ERβ subtypes orchestrate functional homeostasis of normal colonic epithelial cells.
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Affiliation(s)
- Hanxing Wan
- Department of Pharmacology, School of Pharmacy, Qingdao University Medical College, Qingdao, China; Department of Gastroenterology, Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Junhui Li
- Department of Pharmacology, School of Pharmacy, Qingdao University Medical College, Qingdao, China
| | - Xiongying Chen
- Department of Pharmacology, School of Pharmacy, Qingdao University Medical College, Qingdao, China
| | - Zachary M Sellers
- Pediatric Gastroenterology Hepatology & Nutrition, Stanford University School of Medicine, Palo Alto, California, USA.
| | - Hui Dong
- Department of Pharmacology, School of Pharmacy, Qingdao University Medical College, Qingdao, China.
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2
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Manneck D, Manz G, Braun HS, Rosendahl J, Stumpff F. The TRPA1 Agonist Cinnamaldehyde Induces the Secretion of HCO 3- by the Porcine Colon. Int J Mol Sci 2021; 22:ijms22105198. [PMID: 34068986 PMCID: PMC8156935 DOI: 10.3390/ijms22105198] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 05/09/2021] [Accepted: 05/10/2021] [Indexed: 02/07/2023] Open
Abstract
A therapeutic potential of the TRPA1 channel agonist cinnamaldehyde for use in inflammatory bowel disease is emerging, but the mechanisms are unclear. Semi-quantitative qPCR of various parts of the porcine gastrointestinal tract showed that mRNA for TRPA1 was highest in the colonic mucosa. In Ussing chambers, 1 mmol·L-1 cinnamaldehyde induced increases in short circuit current (ΔIsc) and conductance (ΔGt) across the colon that were higher than those across the jejunum or after 1 mmol·L-1 thymol. Lidocaine, amiloride or bumetanide did not change the response. The application of 1 mmol·L-1 quinidine or the bilateral replacement of 120 Na+, 120 Cl- or 25 HCO3- reduced ΔGt, while the removal of Ca2+ enhanced ΔGt with ΔIsc numerically higher. ΔIsc decreased after 0.5 NPPB, 0.01 indometacin and the bilateral replacement of 120 Na+ or 25 HCO3-. The removal of 120 Cl- had no effect. Cinnamaldehyde also activates TRPV3, but comparative measurements involving patch clamp experiments on overexpressing cells demonstrated that much higher concentrations are required. We suggest that cinnamaldehyde stimulates the secretion of HCO3- via apical CFTR and basolateral Na+-HCO3- cotransport, preventing acidosis and damage to the epithelium and the colonic microbiome. Signaling may involve the opening of TRPA1, depolarization of the epithelium and a rise in PGE2 following a lower uptake of prostaglandins via OATP2A1.
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Affiliation(s)
- David Manneck
- Department of Veterinary Medicine, Institute of Veterinary Physiology, Freie Universität Berlin, Oertzenweg 19b, 14163 Berlin, Germany; (D.M.); (G.M.)
| | - Gisela Manz
- Department of Veterinary Medicine, Institute of Veterinary Physiology, Freie Universität Berlin, Oertzenweg 19b, 14163 Berlin, Germany; (D.M.); (G.M.)
| | - Hannah-Sophie Braun
- PerformaNat GmbH, Hohentwielsteig 6, 14163 Berlin, Germany; (H.-S.B.); (J.R.)
| | - Julia Rosendahl
- PerformaNat GmbH, Hohentwielsteig 6, 14163 Berlin, Germany; (H.-S.B.); (J.R.)
| | - Friederike Stumpff
- Department of Veterinary Medicine, Institute of Veterinary Physiology, Freie Universität Berlin, Oertzenweg 19b, 14163 Berlin, Germany; (D.M.); (G.M.)
- Correspondence: ; Tel.: +49-30-838-62595
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The electrogenic sodium bicarbonate cotransporter and its roles in the myocardial ischemia-reperfusion induced cardiac diseases. Life Sci 2021; 270:119153. [PMID: 33539911 DOI: 10.1016/j.lfs.2021.119153] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 01/06/2021] [Accepted: 01/22/2021] [Indexed: 12/19/2022]
Abstract
Cardiac tissue ischemia/hypoxia increases glycolysis and lactic acid accumulation in cardiomyocytes, leading to intracellular metabolic acidosis. Sodium bicarbonate cotransporters (NBCs) play a vital role in modulating intracellular pH and maintaining sodium ion concentrations in cardiomyocytes. Cardiomyocytes mainly express electrogenic sodium bicarbonate cotransporter (NBCe1), which has been demonstrated to participate in myocardial ischemia/reperfusion (I/R) injury. This review outlines the structural and functional properties of NBCe1, summarizes the signaling pathways and factors that may regulate the activity of NBCe1, and reviews the roles of NBCe1 in the pathogenesis of I/R-induced cardiac diseases. Further studies revealing the regulatory mechanisms of NBCe1 activity should provide novel therapeutic targets for preventing I/R-induced cardiac diseases.
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Virreira M, Jin L, Djerbib S, De Deken X, Miot F, Massart C, Svoboda M, Van Sande J, Beauwens R, Dumont JE, Boom A. Expression, Localization, and Regulation of the Sodium Bicarbonate Cotransporter NBCe1 in the Thyroid. Thyroid 2019; 29:290-301. [PMID: 30526387 DOI: 10.1089/thy.2017.0576] [Citation(s) in RCA: 2] [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] [Indexed: 11/12/2022]
Abstract
BACKGROUND The intrafollicular space of thyroid follicles is the storage compartment for thyroid hormones. Its pH has been established at around 7.6 at least after thyrotropin (TSH) stimulation. This alkaline intrafollicular pH is thought to be critical for iodide coupling to thyroglobulin and internalization of iodinated thyroglobulin. At least in mice, this alkalinization requires the expression of pendrin (Slc26a4) within the apical membrane, and a lack of pendrin results in acidic follicular lumen pH. Yet, the mechanism importing HCO3- into the cytoplasm is unknown. This study investigated whether the rather ubiquitous sodium bicarbonate cotransporter NBCe1 (SLC4A4) might play this role. It also examined which variant was expressed and where it was localized in both rat and human thyroid tissue. Lastly, the dependence of its expression on TSH was studied. METHODS Reverse transcription polymerase chain reaction, immunofluorescence, and Western blotting were used to test whether TSH stimulated NBCe1 protein expression in vivo. Subcellular localization of NBCe1 was performed using immunofluorescence in both rat and human thyroid. Cultured thyroid cells were also used to attempt to define how TSH affects NBCe1 expression. RESULTS Only transcripts of the NBCe1-B variant were detected in both rat and human thyroid. Of interest, NBCe1-C was not detected in human tissues, not even in the brain. On immunofluorescence microscopy, the immunostaining of NBCe1 mainly appeared in the basolateral membrane upon stimulation with TSH. This TSH induction of basolateral membrane expression of NBCe1 protein was confirmed in vivo in rat thyroid and in vitro on human thyroid slices. CONCLUSIONS This study demonstrates the expression of the sodium bicarbonate cotransporter NBCe1-B in rat and human thyroid. Additionally, the data suggest that TSH blocks the degradation of NBCe1 protein by trafficking it to the basolateral membrane. Hence, TSH increases NBCe1 half-life without increasing its synthesis.
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Affiliation(s)
- Myrna Virreira
- 1 Laboratoire de Physiologie Cellulaire et Moléculaire; de Neuroanatomie et de Neuropahologie, Université libre de Bruxelles, Brussels, Belgium
| | - Ling Jin
- 2 Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire (IRIBHM); de Neuroanatomie et de Neuropahologie, Université libre de Bruxelles, Brussels, Belgium
| | - Sami Djerbib
- 1 Laboratoire de Physiologie Cellulaire et Moléculaire; de Neuroanatomie et de Neuropahologie, Université libre de Bruxelles, Brussels, Belgium
| | - Xavier De Deken
- 2 Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire (IRIBHM); de Neuroanatomie et de Neuropahologie, Université libre de Bruxelles, Brussels, Belgium
| | - Françoise Miot
- 2 Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire (IRIBHM); de Neuroanatomie et de Neuropahologie, Université libre de Bruxelles, Brussels, Belgium
| | - Claude Massart
- 2 Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire (IRIBHM); de Neuroanatomie et de Neuropahologie, Université libre de Bruxelles, Brussels, Belgium
| | - Michal Svoboda
- 3 Laboratoire Chimie Biologique et de la Nutrition; de Neuroanatomie et de Neuropahologie, Université libre de Bruxelles, Brussels, Belgium
| | - Jacqueline Van Sande
- 2 Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire (IRIBHM); de Neuroanatomie et de Neuropahologie, Université libre de Bruxelles, Brussels, Belgium
| | - Renaud Beauwens
- 1 Laboratoire de Physiologie Cellulaire et Moléculaire; de Neuroanatomie et de Neuropahologie, Université libre de Bruxelles, Brussels, Belgium
| | - Jacques-Emile Dumont
- 2 Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire (IRIBHM); de Neuroanatomie et de Neuropahologie, Université libre de Bruxelles, Brussels, Belgium
| | - Alain Boom
- 4 Laboratoire d'Histologie, de Neuroanatomie et de Neuropahologie, Université libre de Bruxelles, Brussels, Belgium
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Grahammer F, Ramakrishnan SK, Rinschen MM, Larionov AA, Syed M, Khatib H, Roerden M, Sass JO, Helmstaedter M, Osenberg D, Kühne L, Kretz O, Wanner N, Jouret F, Benzing T, Artunc F, Huber TB, Theilig F. mTOR Regulates Endocytosis and Nutrient Transport in Proximal Tubular Cells. J Am Soc Nephrol 2016; 28:230-241. [PMID: 27297946 DOI: 10.1681/asn.2015111224] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Accepted: 05/14/2016] [Indexed: 01/03/2023] Open
Abstract
Renal proximal tubular cells constantly recycle nutrients to ensure minimal loss of vital substrates into the urine. Although most of the transport mechanisms have been discovered at the molecular level, little is known about the factors regulating these processes. Here, we show that mTORC1 and mTORC2 specifically and synergistically regulate PTC endocytosis and transport processes. Using a conditional mouse genetic approach to disable nonredundant subunits of mTORC1, mTORC2, or both, we showed that mice lacking mTORC1 or mTORC1/mTORC2 but not mTORC2 alone develop a Fanconi-like syndrome of glucosuria, phosphaturia, aminoaciduria, low molecular weight proteinuria, and albuminuria. Interestingly, proteomics and phosphoproteomics of freshly isolated kidney cortex identified either reduced expression or loss of phosphorylation at critical residues of different classes of specific transport proteins. Functionally, this resulted in reduced nutrient transport and a profound perturbation of the endocytic machinery, despite preserved absolute expression of the main scavenger receptors, MEGALIN and CUBILIN. Our findings highlight a novel mTOR-dependent regulatory network for nutrient transport in renal proximal tubular cells.
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Affiliation(s)
- Florian Grahammer
- Department of Medicine IV, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Suresh K Ramakrishnan
- Institute of Anatomy, Department of Medicine, University of Fribourg, Fribourg, Switzerland
| | - Markus M Rinschen
- Department II of Internal Medicine and Center for Molecular Medicine Cologne, University of Cologne, Cologne, Germany
| | - Alexey A Larionov
- Institute of Anatomy, Department of Medicine, University of Fribourg, Fribourg, Switzerland
| | - Maryam Syed
- Institute of Anatomy, Department of Medicine, University of Fribourg, Fribourg, Switzerland
| | - Hazim Khatib
- Department of Medical IV, Sektion Nieren- und Hochdruckkrankheiten, University of Tübingen, Tübingen, Germany
| | - Malte Roerden
- Department of Medical IV, Sektion Nieren- und Hochdruckkrankheiten, University of Tübingen, Tübingen, Germany
| | - Jörn Oliver Sass
- Bioanalytics and Biochemistry, Department of Natural Sciences, Bonn Rhein Sieg University of Applied Sciences, Rheinbach, Germany.,Division of Clinical Chemistry and Biochemistry and Children's Research Centre, University Children's Hospital Zürich, Zurich, Switzerland
| | - Martin Helmstaedter
- Department of Medicine IV, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Dorothea Osenberg
- Department of Medicine IV, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Lucas Kühne
- Department of Medicine IV, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Oliver Kretz
- Department of Medicine IV, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Nicola Wanner
- Department of Medicine IV, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Francois Jouret
- Groupe Interdisciplinaire de Génoprotéomique Appliquée, Cardiovascular Sciences, University of Liège, Liege, Belgium; and
| | - Thomas Benzing
- Department II of Internal Medicine and Center for Molecular Medicine Cologne, University of Cologne, Cologne, Germany
| | - Ferruh Artunc
- Department of Medical IV, Sektion Nieren- und Hochdruckkrankheiten, University of Tübingen, Tübingen, Germany
| | - Tobias B Huber
- Department of Medicine IV, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany; .,BIOSS, Centre for Biological Signalling Studies and.,FRIAS, Freiburg Institute for Advanced Studies and ZBSA, Center for Biological System Analysis, Albert Ludwigs University of Freiburg, Freiburg, Germany
| | - Franziska Theilig
- Institute of Anatomy, Department of Medicine, University of Fribourg, Fribourg, Switzerland;
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Schrödl-Häußel M, Theparambil SM, Deitmer JW, Roussa E. Regulation of functional expression of the electrogenic sodium bicarbonate cotransporter 1, NBCe1 (SLC4A4), in mouse astrocytes. Glia 2015; 63:1226-39. [DOI: 10.1002/glia.22814] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Revised: 02/17/2015] [Accepted: 02/18/2015] [Indexed: 12/25/2022]
Affiliation(s)
- Magdalena Schrödl-Häußel
- Department of Molecular Embryology; Institute for Anatomy and Cell Biology, University of Freiburg; Freiburg Germany
| | - Shefeeq M. Theparambil
- Department of General Zoology; FB Biology, University of Kaiserslautern; Kaiserslautern Germany
| | - Joachim W. Deitmer
- Department of General Zoology; FB Biology, University of Kaiserslautern; Kaiserslautern Germany
| | - Eleni Roussa
- Department of Molecular Embryology; Institute for Anatomy and Cell Biology, University of Freiburg; Freiburg Germany
- Department of Neuroanatomy; University of Freiburg; Freiburg Germany
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