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Peña-Münzenmayer G, George AT, Llontop N, Mazola Y, Apablaza N, Spichiger C, Brauchi S, Sarmiento J, Zúñiga L, González W, Catalán MA. K +-Driven Cl -/HCO 3- Exchange Mediated by Slc4a8 and Slc4a10. Int J Mol Sci 2024; 25:4575. [PMID: 38674160 PMCID: PMC11050268 DOI: 10.3390/ijms25084575] [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: 03/17/2024] [Revised: 04/11/2024] [Accepted: 04/12/2024] [Indexed: 04/28/2024] Open
Abstract
Slc4a genes encode various types of transporters, including Na+-HCO3- cotransporters, Cl-/HCO3- exchangers, or Na+-driven Cl-/HCO3- exchangers. Previous research has revealed that Slc4a9 (Ae4) functions as a Cl-/HCO3- exchanger, which can be driven by either Na+ or K+, prompting investigation into whether other Slc4a members facilitate cation-dependent anion transport. In the present study, we show that either Na+ or K+ drive Cl-/HCO3- exchanger activity in cells overexpressing Slc4a8 or Slc4a10. Further characterization of cation-driven Cl-/HCO3- exchange demonstrated that Slc4a8 and Slc4a10 also mediate Cl- and HCO3--dependent K+ transport. Full-atom molecular dynamics simulation on the recently solved structure of Slc4a8 supports the coordination of K+ at the Na+ binding site in S1. Sequence analysis shows that the critical residues coordinating monovalent cations are conserved among mouse Slc4a8 and Slc4a10 proteins. Together, our results suggest that Slc4a8 and Slc4a10 might transport K+ in the same direction as HCO3- ions in a similar fashion to that described for Na+ transport in the rat Slc4a8 structure.
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Affiliation(s)
- Gaspar Peña-Münzenmayer
- Instituto de Bioquímica y Microbiología, Facultad de Ciencias, Universidad Austral de Chile, Valdivia 5090000, Chile; (G.P.-M.); (N.A.); (C.S.)
- Millennium Nucleus of Ion Channels-Associated Diseases (MiNICAD), Valdivia 5090000, Chile
| | - Alvin T. George
- Secretory Mechanisms and Dysfunction Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD 20892, USA
| | - Nuria Llontop
- Instituto de Fisiología, Facultad de Medicina, Universidad Austral de Chile, Valdivia 5090000, Chile; (N.L.); (J.S.)
| | - Yuliet Mazola
- Center for Bioinformatics and Molecular Simulations (CBSM), Universidad de Talca, Talca 3460000, Chile (W.G.)
| | - Natalia Apablaza
- Instituto de Bioquímica y Microbiología, Facultad de Ciencias, Universidad Austral de Chile, Valdivia 5090000, Chile; (G.P.-M.); (N.A.); (C.S.)
| | - Carlos Spichiger
- Instituto de Bioquímica y Microbiología, Facultad de Ciencias, Universidad Austral de Chile, Valdivia 5090000, Chile; (G.P.-M.); (N.A.); (C.S.)
| | - Sebastián Brauchi
- Millennium Nucleus of Ion Channels-Associated Diseases (MiNICAD), Valdivia 5090000, Chile
- Instituto de Fisiología, Facultad de Medicina, Universidad Austral de Chile, Valdivia 5090000, Chile; (N.L.); (J.S.)
| | - José Sarmiento
- Instituto de Fisiología, Facultad de Medicina, Universidad Austral de Chile, Valdivia 5090000, Chile; (N.L.); (J.S.)
| | - Leandro Zúñiga
- Centro de Nanomedicina, Diagnóstico y Desarrollo de Fármacos (ND3), Laboratorio de Fisiología Molecular, Escuela de Medicina, Universidad de Talca, Casilla, Talca 3460000, Chile;
| | - Wendy González
- Center for Bioinformatics and Molecular Simulations (CBSM), Universidad de Talca, Talca 3460000, Chile (W.G.)
- Millennium Nucleus of Ion Channels-Associated Diseases (MiNICAD), Talca 3460000, Chile
| | - Marcelo A. Catalán
- Instituto de Fisiología, Facultad de Medicina, Universidad Austral de Chile, Valdivia 5090000, Chile; (N.L.); (J.S.)
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Lashhab R, Essuman G, Chavez-Canales M, Alexander RT, Cordat E. Expression of the kidney anion exchanger 1 affects WNK4 and SPAK phosphorylation and results in claudin-4 phosphorylation. Heliyon 2023; 9:e22280. [PMID: 38034706 PMCID: PMC10687047 DOI: 10.1016/j.heliyon.2023.e22280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 11/07/2023] [Accepted: 11/08/2023] [Indexed: 12/02/2023] Open
Abstract
In the renal collecting ducts, chloride reabsorption occurs through both transcellular and paracellular pathways. Recent literature highlights a functional interplay between both pathways. We recently showed that in polarized inner medullary collecting duct cells, expression of the basolateral kidney anion exchanger 1 (kAE1) results in a decreased transepithelial electrical resistance (TEER), in a claudin-4 dependent pathway. Claudin-4 is a paracellular sodium blocker and chloride pore. Here, we show that kAE1 expression in mouse inner medullary collecting duct cells triggers WNK4, SPAK and claudin-4 phosphorylation. Expression of a functionally dead kAE1 E681Q mutant has no effect on phosphorylation of these proteins. Expression of a catalytically inactive WNK4 D321A or chloride-insensitive WNK4 L319F mutant abolishes kAE1 effect on TEER, supporting a contribution of WNK4 to the process. We propose that variations of the cytosolic pH and chloride concentration upon kAE1 expression alter WNK4 kinase activity and tight junction properties.
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Affiliation(s)
- Rawad Lashhab
- Department of Physiology and Membrane Protein Disease Research Group, University of Alberta, Edmonton, Alberta, Canada
| | - Grace Essuman
- Department of Physiology and Membrane Protein Disease Research Group, University of Alberta, Edmonton, Alberta, Canada
| | - Maria Chavez-Canales
- Unidad de Investigación UNAM-INCICh, Instituto Nacional de Cardiología Ignacio Chávez and Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Tlalpan, Mexico City, 14080, Mexico
| | - R. Todd Alexander
- Department of Physiology and Membrane Protein Disease Research Group, University of Alberta, Edmonton, Alberta, Canada
- Department of Pediatrics, University of Alberta, Edmonton, Alberta, Canada
| | - Emmanuelle Cordat
- Department of Physiology and Membrane Protein Disease Research Group, University of Alberta, Edmonton, Alberta, Canada
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Niu W, Wang H, Wang B, Mao X, Du M. Resveratrol improves muscle regeneration in obese mice through enhancing mitochondrial biogenesis. J Nutr Biochem 2021; 98:108804. [PMID: 34171502 DOI: 10.1016/j.jnutbio.2021.108804] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 04/09/2021] [Accepted: 06/01/2021] [Indexed: 12/13/2022]
Abstract
Obesity is increasing rapidly worldwide and is accompanied by many complications, including impaired muscle regeneration. Obesity is known to inhibit AMP-activated protein kinase (AMPK) activity, which impedes mitochondrial biogenesis, myogenic differentiation and muscle regeneration. Resveratrol has an effective anti-obesity effect, but its effect on regeneration of muscle in obese mice remains to be tested. We hypothesized that resveratrol activates AMPK and mitochondrial biogenesis to improve muscle regeneration. Male C57BL/6J mice were fed a control diet or a 60% high-fat diet with or without resveratrol supplementation for 8 weeks and, then, the tibialis anterior muscle was subjected to cardiotoxin-induced muscle injury. Muscle tissue was collected at 3 and 7 d after injury. We found that resveratrol enhanced both proliferation and differentiation of satellite cells following injury in obese mice. Markers of mitochondrial biogenesis were upregulated in resveratrol-treated mice. In C2C12 myogenic cells, resveratrol activated AMPK and stimulated the expression of peroxisome proliferator-activated receptor gamma coactivator 1-alpha, which were associated with enhanced myogenic differentiation. Such effects of resveratrol were abolished by AMPKα1 ablation, showing the mediatory roles of AMPK. In summary, dietary resveratrol activates AMPK/ proliferator-activated receptor gamma coactivator 1-alpha axis to facilitate mitochondrial biogenesis and muscle regeneration impaired due to obesity.
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Affiliation(s)
- Wenjing Niu
- Key Laboratory of Precision Nutrition and Food Quality, Department of Nutrition and Health, China Agricultural University, Beijing, China; College of Food Science & Nutritional Engineering, China Agricultural University, Beijing, China
| | - Haibo Wang
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization (Southwest Minzu University), Ministry of Education, Chengdu, China
| | - Bo Wang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Xueying Mao
- College of Food Science & Nutritional Engineering, China Agricultural University, Beijing, China
| | - Min Du
- Department of Animal Sciences, Washington State University, Pullman, WA, USA.
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Sun S, Zhang D, Sun G, Song Y, Cai J, Fan Z, Wang H. Solute carrier family 4 member 1 might participate in the pathogenesis of Meniere's disease in a murine endolymphatic hydrop model. Acta Otolaryngol 2019; 139:966-976. [PMID: 31536436 DOI: 10.1080/00016489.2019.1663365] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Background: To date, the pathogenesis of Meniere's disease (MD) remains unclear. Previous research found that the SLC4A1 gene significantly down-regulated. Aims: This study sought to understand the effect of SLC4A1 on the pathogenesis of MD. ELH C57 mice models were induced by intraperitoneal injection of AVP. Material and methods: The mRNA expression levels of SLC4A1, SLC4A10 and SLC26A4 were monitored by real-time quantitative PCR, the protein expression levels of SLC4A1 were monitored by immunoblotting and immunofluorescence before and after the ELH. DIDS is an inhibitor of SLC4A1. The expression levels of SLC4A1 were also monitored in the AVP + DIDS group. Results: We successfully established the model of ELH after applied AVP. The results of HE staining showed displacement of Reissner's membrane with bulge to scala vestibule in ears of the AVP group. Cochlea/ELS SLC4A1 protein and SLC4A1, SLC4A10, SLC26A4 mRNA expressions were reduced significantly in C57 mice of the AVP group. The SLC4A1 protein expression levels and SLC4A1, SLC4A10, SLC26A4 mRNA expression levels declined more obvious in the cochlea and ELS in C57 mice of the AVP + DIDS group. Conclusions and significance: SLC4A1 was a protective factor in the pathogenesis of MD, but the mechanisms were unknown.
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Affiliation(s)
- Shujuan Sun
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial ENT Hospital Affiliated to Shandong University, Jinan 250022, P.R. China
| | - Daogong Zhang
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial ENT Hospital Affiliated to Shandong University, Jinan 250022, P.R. China
| | - Gaoying Sun
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial ENT Hospital Affiliated to Shandong University, Jinan 250022, P.R. China
| | - Yongdong Song
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial ENT Hospital Affiliated to Shandong University, Jinan 250022, P.R. China
| | - Jing Cai
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial ENT Hospital Affiliated to Shandong University, Jinan 250022, P.R. China
| | - Zhaomin Fan
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial ENT Hospital Affiliated to Shandong University, Jinan 250022, P.R. China
| | - Haibo Wang
- Department of Otolaryngology-Head and Neck Surgery, Shandong Provincial ENT Hospital Affiliated to Shandong University, Jinan 250022, P.R. China
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Reithmeier RAF, Casey JR, Kalli AC, Sansom MSP, Alguel Y, Iwata S. Band 3, the human red cell chloride/bicarbonate anion exchanger (AE1, SLC4A1), in a structural context. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2016; 1858:1507-32. [PMID: 27058983 DOI: 10.1016/j.bbamem.2016.03.030] [Citation(s) in RCA: 127] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 03/21/2016] [Accepted: 03/29/2016] [Indexed: 02/03/2023]
Abstract
The crystal structure of the dimeric membrane domain of human Band 3(1), the red cell chloride/bicarbonate anion exchanger 1 (AE1, SLC4A1), provides a structural context for over four decades of studies into this historic and important membrane glycoprotein. In this review, we highlight the key structural features responsible for anion binding and translocation and have integrated the following topological markers within the Band 3 structure: blood group antigens, N-glycosylation site, protease cleavage sites, inhibitor and chemical labeling sites, and the results of scanning cysteine and N-glycosylation mutagenesis. Locations of mutations linked to human disease, including those responsible for Southeast Asian ovalocytosis, hereditary stomatocytosis, hereditary spherocytosis, and distal renal tubular acidosis, provide molecular insights into their effect on Band 3 folding. Finally, molecular dynamics simulations of phosphatidylcholine self-assembled around Band 3 provide a view of this membrane protein within a lipid bilayer.
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Affiliation(s)
- Reinhart A F Reithmeier
- Department of Biochemistry, 1 King's College Circle, University of Toronto, Toronto M5S 1A8, Canada.
| | - Joseph R Casey
- Department of Biochemistry, Membrane Protein Disease Research Group, University of Alberta, Edmonton, Alberta T6G 2H7, Canada
| | - Antreas C Kalli
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Mark S P Sansom
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Yilmaz Alguel
- Division of Molecular Biosciences, Imperial College London, London, SW7 2AZ, UK
| | - So Iwata
- Division of Molecular Biosciences, Imperial College London, London, SW7 2AZ, UK
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Alka K, Casey JR. Bicarbonate transport in health and disease. IUBMB Life 2014; 66:596-615. [PMID: 25270914 DOI: 10.1002/iub.1315] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Accepted: 09/10/2014] [Indexed: 12/28/2022]
Abstract
Bicarbonate (HCO3(-)) has a central place in human physiology as the waste product of mitochondrial energy production and for its role in pH buffering throughout the body. Because bicarbonate is impermeable to membranes, bicarbonate transport proteins are necessary to enable control of bicarbonate levels across membranes. In humans, 14 bicarbonate transport proteins, members of the SLC4 and SLC26 families, function by differing transport mechanisms. In addition, some anion channels and ZIP metal transporters contribute to bicarbonate movement across membranes. Defective bicarbonate transport leads to diseases, including systemic acidosis, brain dysfunction, kidney stones, and hypertension. Altered expression levels of bicarbonate transporters in patients with breast, colon, and lung cancer suggest an important role of these transporters in cancer.
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Affiliation(s)
- Kumari Alka
- Department of Biochemistry, University of Alberta, Edmonton, AB, Canada
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Cordat E, Reithmeier RA. Structure, Function, and Trafficking of SLC4 and SLC26 Anion Transporters. CURRENT TOPICS IN MEMBRANES 2014; 73:1-67. [DOI: 10.1016/b978-0-12-800223-0.00001-3] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Functional rescue of a kidney anion exchanger 1 trafficking mutant in renal epithelial cells. PLoS One 2013; 8:e57062. [PMID: 23460825 PMCID: PMC3584104 DOI: 10.1371/journal.pone.0057062] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Accepted: 01/17/2013] [Indexed: 12/12/2022] Open
Abstract
Mutations in the SLC4A1 gene encoding the anion exchanger 1 (AE1) can cause distal renal tubular acidosis (dRTA), a disease often due to mis-trafficking of the mutant protein. In this study, we investigated whether trafficking of a Golgi-retained dRTA mutant, G701D kAE1, or two dRTA mutants retained in the endoplasmic reticulum, C479W and R589H kAE1, could be functionally rescued to the plasma membrane of Madin-Darby Canine Kidney (MDCK) cells. Treatments with DMSO, glycerol, the corrector VX-809, or low temperature incubations restored the basolateral trafficking of G701D kAE1 mutant. These treatments had no significant rescuing effect on trafficking of the mis-folded C479W or R589H kAE1 mutants. DMSO was the only treatment that partially restored G701D kAE1 function in the plasma membrane of MDCK cells. Our experiments show that trafficking of intracellularly retained dRTA kAE1 mutants can be partially restored, and that one chemical treatment rescued both trafficking and function of a dRTA mutant. These studies provide an opportunity to develop alternative therapeutic solutions for dRTA patients.
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