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Mukherjee S, Roy S, Corpas FJ. Aquaporins: a vital nexus in H 2O 2-gasotransmitter signaling. TRENDS IN PLANT SCIENCE 2024; 29:681-693. [PMID: 38199830 DOI: 10.1016/j.tplants.2023.11.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Revised: 11/20/2023] [Accepted: 11/29/2023] [Indexed: 01/12/2024]
Abstract
Land plants have evolved with a complex mechanism of water uptake facilitated by the activity of aquaporins under normal and challenging environments. However, we lack a clear understanding of its interactions with reactive oxygen species, particularly hydrogen peroxide (H2O2) and the gasotransmitters nitric oxide (NO) and hydrogen sulfide (H2S), under oxidative stress. Here, we assess the crosstalk of aquaporin function, H2O2 homeostasis, and NO-H2S signaling in plants and provide a computational prediction of cysteine-based oxidative post-translational modifications (oxiPTMs) in plant aquaporins. We propose that aquaporin activity could be regulated by three major oxiPTMs, S-nitrosation, S-sulfenylation, and persulfidation, mediated by NO, H2O2, and H2S, respectively. Therefore, aquaporins might be key players in the gasotransmitter-mediated long-distance oxidative stress signals in plant cells.
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Affiliation(s)
- Soumya Mukherjee
- Department of Botany, Jangipur College, University of Kalyani, West Bengal, India
| | - Suchismita Roy
- Department of Cell and Molecular Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Francisco J Corpas
- Group of Antioxidants, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Stress, Development and Signalling in Plants, Estación Experimental del Zaidín (Spanish National Research Council), Granada, Spain.
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2
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Al-Samir S, Yildirim AÖ, Sidhaye VK, King LS, Breves G, Conlon TM, Stoeger C, Gailus-Durner V, Fuchs H, Hrabé de Angelis M, Gros G, Endeward V. Aqp5 -/- mice exhibit reduced maximal body O 2 consumption under cold exposure, normal pulmonary gas exchange, and impaired formation of brown adipose tissue. Am J Physiol Regul Integr Comp Physiol 2023; 324:R109-R119. [PMID: 36409022 DOI: 10.1152/ajpregu.00130.2022] [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: 11/23/2022]
Abstract
The fundamental body functions that determine maximal O2 uptake (V̇o2max) have not been studied in Aqp5-/- mice (aquaporin 5, AQP5). We measured V̇o2max to globally assess these functions and then investigated why it was found altered in Aqp5-/- mice. V̇o2max was measured by the Helox technique, which elicits maximal metabolic rate by intense cold exposure of the animals. We found V̇o2max reduced in Aqp5-/- mice by 20%-30% compared with wild-type (WT) mice. As AQP5 has been implicated to act as a membrane channel for respiratory gases, we studied whether this is caused by the known lack of AQP5 in the alveolar epithelial membranes of Aqp5-/- mice. Lung function parameters as well as arterial O2 saturation were normal and identical between Aqp5-/- and WT mice, indicating that AQP5 does not contribute to pulmonary O2 exchange. The cause for the decreased V̇o2max thus might be found in decreased O2 consumption of an intensely O2-consuming peripheral organ such as activated brown adipose tissue (BAT). We found indeed that absence of AQP5 greatly reduces the amount of interscapular BAT formed in response to 4 wk of cold exposure, from 63% in WT to 25% in Aqp5-/- animals. We conclude that lack of AQP5 does not affect pulmonary O2 exchange, but greatly inhibits transformation of white to brown adipose tissue. As under cold exposure, BAT is a major source of the animals' heat production, reduction of BAT likely causes the decrease in V̇o2max under this condition.
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Affiliation(s)
- Samer Al-Samir
- Zentrum Physiologie, AG Vegetative Physiologie, Medizinische Hochschule, Hannover, Germany
| | - Ali Önder Yildirim
- Comprehensive Pneumology Center, Institute of Lung Biology and Disease, Helmholtz Zentrum München, Member of the German Center for Lung Research (DZL), München, Germany
| | - Venkataramana K Sidhaye
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Johns Hopkins School of Medicine, Baltimore, Maryland
| | - Landon S King
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Johns Hopkins School of Medicine, Baltimore, Maryland
| | - Gerhard Breves
- Institut für Physiologie und Zellbiologie, Tierärztliche Hochschule Hannover, Hannover, Germany
| | - Thomas M Conlon
- Comprehensive Pneumology Center, Institute of Lung Biology and Disease, Helmholtz Zentrum München, Member of the German Center for Lung Research (DZL), München, Germany
| | - Claudia Stoeger
- Institute of Experimental Genetics, German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environmental Health, GmbH, Neuherberg, Germany
| | - Valerie Gailus-Durner
- Institute of Experimental Genetics, German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environmental Health, GmbH, Neuherberg, Germany
| | - Helmut Fuchs
- Institute of Experimental Genetics, German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environmental Health, GmbH, Neuherberg, Germany
| | - Martin Hrabé de Angelis
- Institute of Experimental Genetics, German Mouse Clinic, Helmholtz Zentrum München, German Research Center for Environmental Health, GmbH, Neuherberg, Germany.,German Center for Diabetes Research, Neuherberg, Germany.,Chair of Experimental Genetics, Technische Universität München School of Life Sciences, Technische Universität München, Freising, Germany
| | - Gerolf Gros
- Zentrum Physiologie, AG Vegetative Physiologie, Medizinische Hochschule, Hannover, Germany
| | - Volker Endeward
- Zentrum Physiologie, AG Vegetative Physiologie, Medizinische Hochschule, Hannover, Germany
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3
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Shangzu Z, Dingxiong X, ChengJun M, Yan C, Yangyang L, Zhiwei L, Ting Z, Zhiming M, Yiming Z, Liying Z, Yongqi L. Aquaporins: Important players in the cardiovascular pathophysiology. Pharmacol Res 2022; 183:106363. [PMID: 35905892 DOI: 10.1016/j.phrs.2022.106363] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 07/20/2022] [Accepted: 07/22/2022] [Indexed: 11/15/2022]
Abstract
Aquaporin is a membrane channel protein widely expressed in body tissues, which can control the input and output of water in cells. AQPs are differentially expressed in different cardiovascular tissues and participate in water transmembrane transport, cell migration, metabolism, inflammatory response, etc. The aberrant expression of AQPs highly correlates with the onset of ischemic heart disease, myocardial ischemia-reperfusion injury, heart failure, etc. Despite much attention to the regulatory role of AQPs in the cardiovascular system, the translation of AQPs into clinical application still faces many challenges, including clarification of the localization of AQPs in the cardiovascular system and mechanisms mediating cardiovascular pathophysiology, as well as the development of cardiovascular-specific AQPs modulators.Therefore, in this study, we comprehensively reviewed the critical roles of AQP family proteins in maintaining cardiovascular homeostasis and described the underlying mechanisms by which AQPs mediated the outcomes of cardiovascular diseases. Meanwhile, AQPs serve as important therapeutic targets, which provide a wide range of opportunities to investigate the mechanisms of cardiovascular diseases and the treatment of those diseases.
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Affiliation(s)
- Zhang Shangzu
- Gansu University of traditional Chinese Medicine, LanZhou, China
| | - Xie Dingxiong
- Gansu Institute of Cardiovascular Diseases, LanZhou,China
| | - Ma ChengJun
- Gansu University of traditional Chinese Medicine, LanZhou, China
| | - Chen Yan
- Gansu University of traditional Chinese Medicine, LanZhou, China
| | - Li Yangyang
- Gansu University of traditional Chinese Medicine, LanZhou, China
| | - Liu Zhiwei
- Gansu University of traditional Chinese Medicine, LanZhou, China
| | - Zhou Ting
- Gansu University of traditional Chinese Medicine, LanZhou, China
| | - Miao Zhiming
- Gansu University of traditional Chinese Medicine, LanZhou, China
| | - Zhang Yiming
- Gansu University of traditional Chinese Medicine, LanZhou, China
| | - Zhang Liying
- Gansu University of traditional Chinese Medicine, LanZhou, China; Gansu Institute of Cardiovascular Diseases, LanZhou,China.
| | - Liu Yongqi
- Gansu University of traditional Chinese Medicine, LanZhou, China; Provincial-Level Key Laboratory for Molecular Medicine of Major Diseases and the Prevention and Treatment with Traditional Chinese Medicine Research in Gansu Colleges and Universities Gansu University of Chinese Medicine, Lanzhou, China; Key Laboratory of Dunhuang Medicine and Transformation at Provincial and Ministerial Level, Lanzhou, China.
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4
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Montiel V, Bella R, Michel LYM, Esfahani H, De Mulder D, Robinson EL, Deglasse JP, Tiburcy M, Chow PH, Jonas JC, Gilon P, Steinhorn B, Michel T, Beauloye C, Bertrand L, Farah C, Dei Zotti F, Debaix H, Bouzin C, Brusa D, Horman S, Vanoverschelde JL, Bergmann O, Gilis D, Rooman M, Ghigo A, Geninatti-Crich S, Yool A, Zimmermann WH, Roderick HL, Devuyst O, Balligand JL. Inhibition of aquaporin-1 prevents myocardial remodeling by blocking the transmembrane transport of hydrogen peroxide. Sci Transl Med 2021; 12:12/564/eaay2176. [PMID: 33028705 DOI: 10.1126/scitranslmed.aay2176] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 12/24/2019] [Accepted: 08/31/2020] [Indexed: 12/31/2022]
Abstract
Pathological remodeling of the myocardium has long been known to involve oxidant signaling, but strategies using systemic antioxidants have generally failed to prevent it. We sought to identify key regulators of oxidant-mediated cardiac hypertrophy amenable to targeted pharmacological therapy. Specific isoforms of the aquaporin water channels have been implicated in oxidant sensing, but their role in heart muscle is unknown. RNA sequencing from human cardiac myocytes revealed that the archetypal AQP1 is a major isoform. AQP1 expression correlates with the severity of hypertrophic remodeling in patients with aortic stenosis. The AQP1 channel was detected at the plasma membrane of human and mouse cardiac myocytes from hypertrophic hearts, where it colocalized with NADPH oxidase-2 and caveolin-3. We show that hydrogen peroxide (H2O2), produced extracellularly, is necessary for the hypertrophic response of isolated cardiac myocytes and that AQP1 facilitates the transmembrane transport of H2O2 through its water pore, resulting in activation of oxidant-sensitive kinases in cardiac myocytes. Structural analysis of the amino acid residues lining the water pore of AQP1 supports its permeation by H2O2 Deletion of Aqp1 or selective blockade of the AQP1 intrasubunit pore inhibited H2O2 transport in mouse and human cells and rescued the myocyte hypertrophy in human induced pluripotent stem cell-derived engineered heart muscle. Treatment of mice with a clinically approved AQP1 inhibitor, Bacopaside, attenuated cardiac hypertrophy. We conclude that cardiac hypertrophy is mediated by the transmembrane transport of H2O2 by the water channel AQP1 and that inhibitors of AQP1 represent new possibilities for treating hypertrophic cardiomyopathies.
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Affiliation(s)
- Virginie Montiel
- Institute of Experimental and Clinical Research (IREC), Pharmacology and Therapeutics (FATH), Cliniques Universitaires St Luc and Université Catholique de Louvain (UCLouvain), 1200 Brussels, Belgium
| | - Ramona Bella
- Institute of Experimental and Clinical Research (IREC), Pharmacology and Therapeutics (FATH), Cliniques Universitaires St Luc and Université Catholique de Louvain (UCLouvain), 1200 Brussels, Belgium
| | - Lauriane Y M Michel
- Institute of Experimental and Clinical Research (IREC), Pharmacology and Therapeutics (FATH), Cliniques Universitaires St Luc and Université Catholique de Louvain (UCLouvain), 1200 Brussels, Belgium
| | - Hrag Esfahani
- Institute of Experimental and Clinical Research (IREC), Pharmacology and Therapeutics (FATH), Cliniques Universitaires St Luc and Université Catholique de Louvain (UCLouvain), 1200 Brussels, Belgium
| | - Delphine De Mulder
- Institute of Experimental and Clinical Research (IREC), Pharmacology and Therapeutics (FATH), Cliniques Universitaires St Luc and Université Catholique de Louvain (UCLouvain), 1200 Brussels, Belgium
| | - Emma L Robinson
- Laboratory of Experimental Cardiology, Department of Cardiovascular Sciences, KULeuven, 3000 Leuven, Belgium
| | - Jean-Philippe Deglasse
- Institute of Experimental and Clinical Research (IREC), Endocrinology, Diabetes and Nutrition (EDIN), Université Catholique de Louvain (UCLouvain), 1200 Brussels, Belgium
| | - Malte Tiburcy
- Institute of Pharmacology and Toxicology, University Medical Center Göttingen, 37075 Göttingen, Germany.,DZHK (German Center for Cardiovascular Research), Partner Site Göttingen, 37075 Göttingen, Germany
| | - Pak Hin Chow
- Adelaide Medical School, University of Adelaide, Adelaide, SA 5000, Australia
| | - Jean-Christophe Jonas
- Institute of Experimental and Clinical Research (IREC), Endocrinology, Diabetes and Nutrition (EDIN), Université Catholique de Louvain (UCLouvain), 1200 Brussels, Belgium
| | - Patrick Gilon
- Institute of Experimental and Clinical Research (IREC), Endocrinology, Diabetes and Nutrition (EDIN), Université Catholique de Louvain (UCLouvain), 1200 Brussels, Belgium
| | - Benjamin Steinhorn
- Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 2115, USA
| | - Thomas Michel
- Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 2115, USA
| | - Christophe Beauloye
- Institute of Experimental and Clinical Research (IREC), Pole of Cardiovascular Research (CARD), Cliniques Universitaires St Luc and Université Catholique de Louvain (UCLouvain), 1200 Brussels, Belgium
| | - Luc Bertrand
- Institute of Experimental and Clinical Research (IREC), Pole of Cardiovascular Research (CARD), Cliniques Universitaires St Luc and Université Catholique de Louvain (UCLouvain), 1200 Brussels, Belgium
| | - Charlotte Farah
- Institute of Experimental and Clinical Research (IREC), Pharmacology and Therapeutics (FATH), Cliniques Universitaires St Luc and Université Catholique de Louvain (UCLouvain), 1200 Brussels, Belgium
| | - Flavia Dei Zotti
- Institute of Experimental and Clinical Research (IREC), Pharmacology and Therapeutics (FATH), Cliniques Universitaires St Luc and Université Catholique de Louvain (UCLouvain), 1200 Brussels, Belgium
| | - Huguette Debaix
- Institute of Experimental and Clinical Research (IREC), Nephrology (NEFR), Cliniques Universitaires St Luc and Université Catholique de Louvain (UCLouvain), 1200 Brussels, Belgium.,Institute of Physiology, University of Zürich, CH 8057 Zürich, Switzerland
| | - Caroline Bouzin
- 2IP-IREC Imaging Platform, Institute of Experimental and Clinical Research (IREC), Université Catholique de Louvain (UCLouvain), 1200 Brussels, Belgium
| | - Davide Brusa
- Flow Cytometry Platform, Institute of Experimental and Clinical Research (IREC), Université Catholique de Louvain (UCLouvain), 1200 Brussels, Belgium
| | - Sandrine Horman
- Institute of Experimental and Clinical Research (IREC), Pole of Cardiovascular Research (CARD), Cliniques Universitaires St Luc and Université Catholique de Louvain (UCLouvain), 1200 Brussels, Belgium
| | - Jean-Louis Vanoverschelde
- Institute of Experimental and Clinical Research (IREC), Pole of Cardiovascular Research (CARD), Cliniques Universitaires St Luc and Université Catholique de Louvain (UCLouvain), 1200 Brussels, Belgium
| | - Olaf Bergmann
- Center for Regenerative Therapies Dresden, Technische Universität Dresden, 01062 Dresden, Germany.,Department of Cell and Molecular Biology, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - Dimitri Gilis
- Computational Biology and Bioinformatics (3BIO-BioInfo), Université Libre de Bruxelles (ULB), 1000 Brussels, Belgium
| | - Marianne Rooman
- Computational Biology and Bioinformatics (3BIO-BioInfo), Université Libre de Bruxelles (ULB), 1000 Brussels, Belgium
| | - Alessandra Ghigo
- Molecular Biotechnology Center, Università di Torino, 10124 Torino, Italy
| | | | - Andrea Yool
- Adelaide Medical School, University of Adelaide, Adelaide, SA 5000, Australia
| | - Wolfram H Zimmermann
- Institute of Pharmacology and Toxicology, University Medical Center Göttingen, 37075 Göttingen, Germany.,DZHK (German Center for Cardiovascular Research), Partner Site Göttingen, 37075 Göttingen, Germany.,Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Göttingen, 37075 Göttingen, Germany
| | - H Llewelyn Roderick
- Laboratory of Experimental Cardiology, Department of Cardiovascular Sciences, KULeuven, 3000 Leuven, Belgium
| | - Olivier Devuyst
- Institute of Experimental and Clinical Research (IREC), Nephrology (NEFR), Cliniques Universitaires St Luc and Université Catholique de Louvain (UCLouvain), 1200 Brussels, Belgium.,Institute of Physiology, University of Zürich, CH 8057 Zürich, Switzerland
| | - Jean-Luc Balligand
- Institute of Experimental and Clinical Research (IREC), Pharmacology and Therapeutics (FATH), Cliniques Universitaires St Luc and Université Catholique de Louvain (UCLouvain), 1200 Brussels, Belgium.
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5
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Azad AK, Raihan T, Ahmed J, Hakim A, Emon TH, Chowdhury PA. Human Aquaporins: Functional Diversity and Potential Roles in Infectious and Non-infectious Diseases. Front Genet 2021; 12:654865. [PMID: 33796134 PMCID: PMC8007926 DOI: 10.3389/fgene.2021.654865] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Accepted: 02/22/2021] [Indexed: 12/11/2022] Open
Abstract
Aquaporins (AQPs) are integral membrane proteins and found in all living organisms from bacteria to human. AQPs mainly involved in the transmembrane diffusion of water as well as various small solutes in a bidirectional manner are widely distributed in various human tissues. Human contains 13 AQPs (AQP0-AQP12) which are divided into three sub-classes namely orthodox aquaporin (AQP0, 1, 2, 4, 5, 6, and 8), aquaglyceroporin (AQP3, 7, 9, and 10) and super or unorthodox aquaporin (AQP11 and 12) based on their pore selectivity. Human AQPs are functionally diverse, which are involved in wide variety of non-infectious diseases including cancer, renal dysfunction, neurological disorder, epilepsy, skin disease, metabolic syndrome, and even cardiac diseases. However, the association of AQPs with infectious diseases has not been fully evaluated. Several studies have unveiled that AQPs can be regulated by microbial and parasitic infections that suggest their involvement in microbial pathogenesis, inflammation-associated responses and AQP-mediated cell water homeostasis. This review mainly aims to shed light on the involvement of AQPs in infectious and non-infectious diseases and potential AQPs-target modulators. Furthermore, AQP structures, tissue-specific distributions and their physiological relevance, functional diversity and regulations have been discussed. Altogether, this review would be useful for further investigation of AQPs as a potential therapeutic target for treatment of infectious as well as non-infectious diseases.
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Affiliation(s)
- Abul Kalam Azad
- Department of Genetic Engineering and Biotechnology, School of Life Sciences, Shahjalal University of Science and Technology, Sylhet, Bangladesh
| | - Topu Raihan
- Department of Genetic Engineering and Biotechnology, School of Life Sciences, Shahjalal University of Science and Technology, Sylhet, Bangladesh
| | - Jahed Ahmed
- Department of Genetic Engineering and Biotechnology, School of Life Sciences, Shahjalal University of Science and Technology, Sylhet, Bangladesh
- Louvain Institute of Biomolecular Science and Technology, Université catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Al Hakim
- Department of Genetic Engineering and Biotechnology, School of Life Sciences, Shahjalal University of Science and Technology, Sylhet, Bangladesh
| | - Tanvir Hossain Emon
- Department of Genetic Engineering and Biotechnology, School of Life Sciences, Shahjalal University of Science and Technology, Sylhet, Bangladesh
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6
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da Silva IV, Soveral G. Aquaporins in Immune Cells and Inflammation: New Targets for Drug Development. Int J Mol Sci 2021; 22:ijms22041845. [PMID: 33673336 PMCID: PMC7917738 DOI: 10.3390/ijms22041845] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 02/06/2021] [Accepted: 02/09/2021] [Indexed: 12/25/2022] Open
Abstract
The mammalian immune system senses foreign antigens by mechanisms that involve the interplay of various kinds of immune cells, culminating in inflammation resolution and tissue clearance. The ability of the immune cells to communicate (via chemokines) and to shift shape for migration, phagocytosis or antigen uptake is mainly supported by critical proteins such as aquaporins (AQPs) that regulate water fluid homeostasis and volume changes. AQPs are protein channels that facilitate water and small uncharged molecules’ (such as glycerol or hydrogen peroxide) diffusion through membranes. A number of AQP isoforms were found upregulated in inflammatory conditions and are considered essential for the migration and survival of immune cells. The present review updates information on AQPs’ involvement in immunity and inflammatory processes, highlighting their role as crucial players and promising targets for drug discovery.
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Affiliation(s)
- Inês V. da Silva
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal;
- Department of Pharmaceutical Sciences and Medicines, Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
| | - Graça Soveral
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal;
- Department of Pharmaceutical Sciences and Medicines, Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
- Correspondence: ; Tel.: +351-217946461
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Masuda T, Muto S, Fukuda K, Watanabe M, Ohara K, Koepsell H, Vallon V, Nagata D. Osmotic diuresis by SGLT2 inhibition stimulates vasopressin-induced water reabsorption to maintain body fluid volume. Physiol Rep 2020; 8:e14360. [PMID: 31994353 PMCID: PMC6987478 DOI: 10.14814/phy2.14360] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2019] [Revised: 01/02/2020] [Accepted: 01/05/2020] [Indexed: 12/25/2022] Open
Abstract
Most of the filtered glucose is reabsorbed in the early proximal tubule by the sodium-glucose cotransporter SGLT2. The glycosuric effect of the SGLT2 inhibitor ipragliflozin is linked to a diuretic and natriuretic effect that activates compensatory increases in fluid and food intake to stabilize body fluid volume (BFV). However, the compensatory mechanisms that are activated on the level of renal tubules remain unclear. Type 2 diabetic Goto-Kakizaki (GK) rats were treated with vehicle or 0.01% (in diet) ipragliflozin with free access to fluid and food. After 8 weeks, GK rats were placed in metabolic cages for 24-hr. Ipragliflozin decreased body weight, serum glucose and systolic blood pressure, and increased fluid and food intake, urinary glucose and Na+ excretion, urine volume, and renal osmolar clearance, as well as urine vasopressin and solute-free water reabsorption (TcH2O). BFV, measured by bioimpedance spectroscopy, and fluid balance were similar among the two groups. Urine vasopressin in ipragliflozin-treated rats was negatively and positively associated with fluid balance and TcH2O, respectively. Ipragliflozin increased the renal membrane protein expression of SGLT2, aquaporin (AQP) 2 phosphorylated at Ser269 and vasopressin V2 receptor. The expression of SGLT1, GLUT2, AQP1, and AQP2 was similar between the groups. In conclusion, the SGLT2 inhibitor ipragliflozin induced a sustained glucosuria, diuresis, and natriuresis, with compensatory increases in fluid intake and vasopressin-induced TcH2O in proportion to the reduced fluid balance to maintain BFV. These results indicate that the osmotic diuresis induced by SGLT2 inhibition stimulates compensatory fluid intake and renal water reabsorption to maintain BFV.
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Affiliation(s)
- Takahiro Masuda
- Division of NephrologyDepartment of Internal MedicineJichi Medical UniversityShimotsukeTochigiJapan
| | - Shigeaki Muto
- Division of NephrologyDepartment of Internal MedicineJichi Medical UniversityShimotsukeTochigiJapan
| | - Keiko Fukuda
- Division of NephrologyDepartment of Internal MedicineJichi Medical UniversityShimotsukeTochigiJapan
| | - Minami Watanabe
- Division of NephrologyDepartment of Internal MedicineJichi Medical UniversityShimotsukeTochigiJapan
| | - Ken Ohara
- Division of NephrologyDepartment of Internal MedicineJichi Medical UniversityShimotsukeTochigiJapan
| | - Hermann Koepsell
- Department of Molecular Plant Physiology and BiophysicsJulius‐von‐Sachs‐Institute of BiosciencesUniversity of WürzburgWürzburgBavariaGermany
| | - Volker Vallon
- Division of Nephrology and HypertensionDepartment of Medicine and PharmacologyUniversity of California San Diego &VA San Diego Healthcare SystemSan DiegoCAUSA
| | - Daisuke Nagata
- Division of NephrologyDepartment of Internal MedicineJichi Medical UniversityShimotsukeTochigiJapan
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8
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Physiological and pathological impact of AQP1 knockout in mice. Biosci Rep 2019; 39:BSR20182303. [PMID: 31023968 PMCID: PMC6522737 DOI: 10.1042/bsr20182303] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Revised: 04/21/2019] [Accepted: 04/24/2019] [Indexed: 01/04/2023] Open
Abstract
Aquaporin 1 (AQP1) is a glycoprotein responsible for water passive transport quickly across biological membrane. Here, we reviewed the structural and functional impacts of AQP1 knockout (AQP1-KO) in animal or cell culture models. AQP1 gene deletion can cause a large number of abnormalities including the disturbance in epithelial fluid secretion, polyhydramnios, deficiency of urinary concentrating function, and impairment of pain perception. AQP1-KO mice also displayed aberrations of cardiovascular, gastrointestinal and hepatobiliary, and kidney functions as well as placenta and embryo development. Moreover, AQP1-KO perturbed tumor angiogenesis and led to reduced brain injury upon trauma. On the cellular level, AQP1-KO caused neuroinflammation, aberrant cell proliferation and migration, and macrophages infiltration. Mechanistic studies confirmed that AQP1 gene products regulate the secretory function and participated in balancing the osmotic water flux across the peritoneal membrane. The available data indicated that AQP1 might serve as a potential target for developing novel therapeutic approaches against diverse human diseases.
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9
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Verkerk AO, Lodder EM, Wilders R. Aquaporin Channels in the Heart-Physiology and Pathophysiology. Int J Mol Sci 2019; 20:ijms20082039. [PMID: 31027200 PMCID: PMC6514906 DOI: 10.3390/ijms20082039] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 04/19/2019] [Accepted: 04/23/2019] [Indexed: 12/11/2022] Open
Abstract
Mammalian aquaporins (AQPs) are transmembrane channels expressed in a large variety of cells and tissues throughout the body. They are known as water channels, but they also facilitate the transport of small solutes, gasses, and monovalent cations. To date, 13 different AQPs, encoded by the genes AQP0–AQP12, have been identified in mammals, which regulate various important biological functions in kidney, brain, lung, digestive system, eye, and skin. Consequently, dysfunction of AQPs is involved in a wide variety of disorders. AQPs are also present in the heart, even with a specific distribution pattern in cardiomyocytes, but whether their presence is essential for proper (electro)physiological cardiac function has not intensively been studied. This review summarizes recent findings and highlights the involvement of AQPs in normal and pathological cardiac function. We conclude that AQPs are at least implicated in proper cardiac water homeostasis and energy balance as well as heart failure and arsenic cardiotoxicity. However, this review also demonstrates that many effects of cardiac AQPs, especially on excitation-contraction coupling processes, are virtually unexplored.
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Affiliation(s)
- Arie O Verkerk
- Department of Medical Biology, Amsterdam University Medical Centers, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands.
- Department of Experimental Cardiology, Amsterdam University Medical Centers, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands.
| | - Elisabeth M Lodder
- Department of Experimental Cardiology, Amsterdam University Medical Centers, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands.
| | - Ronald Wilders
- Department of Medical Biology, Amsterdam University Medical Centers, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands.
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Zhu L, Ma N, Wang B, Wang L, Zhou C, Yan Y, He J, Ren Y. Significant prognostic values of aquaporin mRNA expression in breast cancer. Cancer Manag Res 2019; 11:1503-1515. [PMID: 30863160 PMCID: PMC6388951 DOI: 10.2147/cmar.s193396] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Introduction Aquaporins (AQPs), also called water channels, have been shown to have functions in the migration, invasion, and proliferation of human breast tumor cells. Most AQP mRNA expression levels were tested by cell lines, mouse models, and even human breast tissues. However, the mRNA expression of individual AQPs in different clinicopathologic characteristics and prognostic values according to different kinds of classifications of breast cancer patients remains unclear. Materials and methods In the current study, we used the Oncomine database, Breast cancer Gene-Expression Miner v4.1, Kaplan–Meier Plotter, and cBioPortal to investigate the expression distribution and prognostic values of AQPs in breast cancer patients. Results Our study revealed that the mRNA expression levels of AQP8, AQP9, and AQP10 were upregulated, while those of AQP3, AQP4, AQP5, and AQP7 were downregulated in breast cancer. The clinical database showed that lower mRNA levels of AQP1 were associated with a high Scarff–Bloom–Richardson grade, but AQP9 showed the opposite trend. Further survival analyses indicated that high mRNA expression levels of AQP0, AQP1, AQP2, AQP4, AQP6, AQP8, AQP10, and AQP11 were significantly associated with better relapse-free survival (RFS). Conversely, AQP3 and AQP9 were associated with worse RFS in breast cancer patients, suggesting that these two genes might be potential targets in future chemotherapy. Discussion These significant AQP members might be further explored as new biomarkers for breast cancer prognosis, but this needs further study.
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Affiliation(s)
- Lizhe Zhu
- Department of Breast Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China,
| | - Nan Ma
- Department of Pharmacy, Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi Province, China
| | - Bin Wang
- Department of Breast Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China,
| | - Lei Wang
- Department of Gynaecology and Obstetrics, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China
| | - Can Zhou
- Department of Breast Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China,
| | - Yu Yan
- Department of Breast Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China,
| | - Jianjun He
- Department of Breast Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China,
| | - Yu Ren
- Department of Breast Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China,
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Masuda T, Watanabe Y, Fukuda K, Watanabe M, Onishi A, Ohara K, Imai T, Koepsell H, Muto S, Vallon V, Nagata D. Unmasking a sustained negative effect of SGLT2 inhibition on body fluid volume in the rat. Am J Physiol Renal Physiol 2018; 315:F653-F664. [PMID: 29790389 PMCID: PMC6734084 DOI: 10.1152/ajprenal.00143.2018] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 05/08/2018] [Accepted: 05/16/2018] [Indexed: 12/25/2022] Open
Abstract
The chronic intrinsic diuretic and natriuretic tone of sodium-glucose cotransporter 2 (SGLT2) inhibitors is incompletely understood because their effect on body fluid volume (BFV) has not been fully evaluated and because they often increase food and fluid intake at the same time. Here we first compared the effect of the SGLT2 inhibitor ipragliflozin (Ipra, 0.01% in diet for 8 wk) and vehicle (Veh) in Spontaneously Diabetic Torii rat, a nonobese type 2 diabetic model, and nondiabetic Sprague-Dawley rats. In nondiabetic rats, Ipra increased urinary excretion of Na+ (UNaV) and fluid (UV) associated with increased food and fluid intake. Diabetes increased these four parameters, but Ipra had no further effect, probably because of its antihyperglycemic effect, such that glucosuria and, as a consequence, food and fluid intake were unchanged. Fluid balance and BFV, determined by bioimpedance spectroscopy, were similar among the four groups. To study the impact of food and fluid intake, nondiabetic rats were treated for 7 days with Veh, Ipra, or Ipra+pair feeding+pair drinking (Pair-Ipra). Pair-Ipra maintained a small increase in UV and UNaV versus Veh despite similar food and fluid intake. Pair-Ipra induced a negative fluid balance and decreased BFV, whereas Ipra or Veh had no significant effect compared with basal values. In conclusion, SGLT2 inhibition induces a sustained diuretic and natriuretic tone. Homeostatic mechanisms are activated to stabilize BFV, including compensatory increases in fluid and food intake.
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Affiliation(s)
- Takahiro Masuda
- Division of Nephrology, Department of Internal Medicine, Jichi Medical University, Shimotsuke, Japan
| | - Yuko Watanabe
- Division of Nephrology, Department of Internal Medicine, Jichi Medical University, Shimotsuke, Japan
| | - Keiko Fukuda
- Division of Nephrology, Department of Internal Medicine, Jichi Medical University, Shimotsuke, Japan
| | - Minami Watanabe
- Division of Nephrology, Department of Internal Medicine, Jichi Medical University, Shimotsuke, Japan
| | - Akira Onishi
- Division of Nephrology, Department of Internal Medicine, Jichi Medical University, Shimotsuke, Japan
| | - Ken Ohara
- Division of Nephrology, Department of Internal Medicine, Jichi Medical University, Shimotsuke, Japan
| | - Toshimi Imai
- Division of Nephrology, Department of Internal Medicine, Jichi Medical University, Shimotsuke, Japan
| | - Hermann Koepsell
- Department of Molecular Plant Physiology and Biophysics, Julius-von-Sachs-Institute, University of Würzburg , Würzburg , Germany
| | - Shigeaki Muto
- Division of Nephrology, Department of Internal Medicine, Jichi Medical University, Shimotsuke, Japan
| | - Volker Vallon
- Division of Nephrology and Hypertension, Departments of Medicine and Pharmacology, University of California San Diego and VA San Diego Healthcare System, San Diego, CA
| | - Daisuke Nagata
- Division of Nephrology, Department of Internal Medicine, Jichi Medical University, Shimotsuke, Japan
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Aquaporin Membrane Channels in Oxidative Stress, Cell Signaling, and Aging: Recent Advances and Research Trends. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:1501847. [PMID: 29770164 PMCID: PMC5892239 DOI: 10.1155/2018/1501847] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 01/29/2018] [Accepted: 02/20/2018] [Indexed: 02/07/2023]
Abstract
Reactive oxygen species (ROS) are produced as a result of aerobic metabolism and as by-products through numerous physiological and biochemical processes. While ROS-dependent modifications are fundamental in transducing intracellular signals controlling pleiotropic functions, imbalanced ROS can cause oxidative damage, eventually leading to many chronic diseases. Moreover, increased ROS and reduced nitric oxide (NO) bioavailability are main key factors in dysfunctions underlying aging, frailty, hypertension, and atherosclerosis. Extensive investigation aims to elucidate the beneficial effects of ROS and NO, providing novel insights into the current medical treatment of oxidative stress-related diseases of high epidemiological impact. This review focuses on emerging topics encompassing the functional involvement of aquaporin channel proteins (AQPs) and membrane transport systems, also allowing permeation of NO and hydrogen peroxide, a major ROS, in oxidative stress physiology and pathophysiology. The most recent advances regarding the modulation exerted by food phytocompounds with antioxidant action on AQPs are also reviewed.
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Rump K, Adamzik M. Function of aquaporins in sepsis: a systematic review. Cell Biosci 2018; 8:10. [PMID: 29449936 PMCID: PMC5807818 DOI: 10.1186/s13578-018-0211-9] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 02/02/2018] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Sepsis is a common cause of death in intensive care units worldwide. Due to the high complexity of this immunological syndrome development of novel therapeutic strategies is urgent. Promising drug targets or biomarkers may depict aquaporins (AQPs) as they regulate crucial key mechanisms of sepsis. MAIN BODY Here we report on base of the current literature that several AQPs are involved in different physiological processes of sepsis. In immune system mainly AQPs 3, 5 and 9 seem to be important, as they regulate the migration of different immune cells. Several studies showed that AQP3 is essential for T cell function and macrophage migration and that AQP5 and AQP9 regulate neutrophil cell migration and impact sepsis survival. Additionally, to the function in immune system AQPs 1 and 5 play a role in sepsis induced lung injury and their downregulation after inflammatory stimuli impair lung injury. By contrast, AQP4 expression is up-regulated during brain inflammation and aggravates brain edema in sepsis. In kidney AQP2 expression is downregulated during sepsis and can cause renal failure. Some studies also suggest a role of AQP1 in cardiac function. CONCLUSION In conclusion, AQPs are involved in many physiological dysfunctions in sepsis and their expressions are differently regulated. Additional research on the regulatory mechanisms of aquaporins may identify potential therapeutic targets.
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Affiliation(s)
- Katharina Rump
- Klinik für Anästhesiologie, Intensivmedizin und Schmerztherapie, Universitätsklinikum Knappschaftskrankenhaus Bochum-Langendreer, Ruhr-Universität Bochum, In der Schornau 23-25, 45882 Bochum, Germany
| | - Michael Adamzik
- Klinik für Anästhesiologie, Intensivmedizin und Schmerztherapie, Universitätsklinikum Knappschaftskrankenhaus Bochum-Langendreer, Ruhr-Universität Bochum, In der Schornau 23-25, 45882 Bochum, Germany
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14
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Magvanjav O, Gong Y, McDonough CW, Chapman AB, Turner ST, Gums JG, Bailey KR, Boerwinkle E, Beitelshees AL, Tanaka T, Kubo M, Pepine CJ, Cooper-DeHoff RM, Johnson JA. Genetic Variants Associated With Uncontrolled Blood Pressure on Thiazide Diuretic/β-Blocker Combination Therapy in the PEAR (Pharmacogenomic Evaluation of Antihypertensive Responses) and INVEST (International Verapamil-SR Trandolapril Study) Trials. J Am Heart Assoc 2017; 6:e006522. [PMID: 29097388 PMCID: PMC5721751 DOI: 10.1161/jaha.117.006522] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Accepted: 09/11/2017] [Indexed: 12/29/2022]
Abstract
BACKGROUND The majority of hypertensive individuals require combination antihypertensive therapy to achieve adequate blood pressure (BP) control. This study aimed to identify genetic variants associated with uncontrolled BP on combination therapy with a thiazide diuretic and a β-blocker. METHODS AND RESULTS A genome-wide association study of uncontrolled BP on combination therapy was conducted among 314 white participants of the PEAR (Pharmacogenomic Evaluation of Antihypertensive Responses) trial. Multivariable logistic regression analysis was used. Genetic variants meeting a suggestive level of significance (P<1.0E-05) were tested for replication in an external cohort, INVEST (International Verapamil-SR Trandolapril study). We also examined genome-wide variant associations with systolic and diastolic BP response on combination therapy and tested for replication. We discovered a single nucleotide polymorphism, the rs261316 major allele, at chromosome 15 in the gene ALDH1A2 associated with an increased odds of having uncontrolled BP on combination therapy (odds ratio: 2.56, 95% confidence interval, 1.69-3.88, P=8.64E-06). This single nucleotide polymorphism replicated (odds ratio: 1.86, 95% confidence interval, 1.35-2.57, P=0.001) and approached genome-wide significance in the meta-analysis between discovery and replication cohorts (odds ratio: 2.16, 95% confidence interval, 1.63-2.86, P=8.60E-08). Other genes in the region surrounding rs261316 (ALDH1A2) include AQP9 and LIPC. CONCLUSIONS A single nucleotide polymorphism in the gene ALDH1A2 may be associated with uncontrolled BP following treatment with a thiazide diuretic/β-blocker combination. CLINICAL TRIAL REGISTRATION URL: https://www.clinicaltrials.gov. Unique identifier: NCT00246519.
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Affiliation(s)
- Oyunbileg Magvanjav
- Department of Pharmacotherapy and Translational Research and Center for Pharmacogenomics, University of Florida College of Pharmacy, Gainesville, FL
- College of Medicine, University of Florida, Gainesville, FL
| | - Yan Gong
- Department of Pharmacotherapy and Translational Research and Center for Pharmacogenomics, University of Florida College of Pharmacy, Gainesville, FL
| | - Caitrin W McDonough
- Department of Pharmacotherapy and Translational Research and Center for Pharmacogenomics, University of Florida College of Pharmacy, Gainesville, FL
| | - Arlene B Chapman
- Section of Nephrology, Department of Medicine, University of Chicago, Chicago, IL
| | - Stephen T Turner
- Division of Nephrology and Hypertension, Department of Medicine, Mayo Clinic, Rochester, MN
| | - John G Gums
- Department of Pharmacotherapy and Translational Research and Center for Pharmacogenomics, University of Florida College of Pharmacy, Gainesville, FL
| | - Kent R Bailey
- Division of Biomedical Statistics and Informatics, Department of Health Sciences Research, Mayo Clinic, Rochester, MN
| | - Eric Boerwinkle
- Human Genetics Center and Institute of Molecular Medicine, University of Texas Health Science Center, Houston, TX
| | - Amber L Beitelshees
- Division of Endocrinology, Diabetes and Nutrition, University of Maryland School of Medicine, Baltimore, MD
| | | | - Michiaki Kubo
- RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Carl J Pepine
- Division of Cardiovascular Medicine, Department of Medicine, University of Florida College of Medicine, Gainesville, FL
| | - Rhonda M Cooper-DeHoff
- Department of Pharmacotherapy and Translational Research and Center for Pharmacogenomics, University of Florida College of Pharmacy, Gainesville, FL
- Division of Cardiovascular Medicine, Department of Medicine, University of Florida College of Medicine, Gainesville, FL
| | - Julie A Johnson
- Department of Pharmacotherapy and Translational Research and Center for Pharmacogenomics, University of Florida College of Pharmacy, Gainesville, FL
- Division of Cardiovascular Medicine, Department of Medicine, University of Florida College of Medicine, Gainesville, FL
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Toussaint J, Raval CB, Nguyen T, Fadaifard H, Joshi S, Wolberg G, Quarfordt S, Jan KM, Rumschitzki DS. Chronic hypertension increases aortic endothelial hydraulic conductivity by upregulating endothelial aquaporin-1 expression. Am J Physiol Heart Circ Physiol 2017; 313:H1063-H1073. [PMID: 28733452 PMCID: PMC5792199 DOI: 10.1152/ajpheart.00651.2016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 07/14/2017] [Accepted: 07/14/2017] [Indexed: 01/22/2023]
Abstract
Numerous studies have examined the role of aquaporins in osmotic water transport in various systems, but virtually none have focused on the role of aquaporin in hydrostatically driven water transport involving mammalian cells save for our laboratory's recent study of aortic endothelial cells. Here, we investigated aquaporin-1 expression and function in the aortic endothelium in two high-renin rat models of hypertension, the spontaneously hypertensive genetically altered Wistar-Kyoto rat variant and Sprague-Dawley rats made hypertensive by two-kidney, one-clip Goldblatt surgery. We measured aquaporin-1 expression in aortic endothelial cells from whole rat aortas by quantitative immunohistochemistry and function by measuring the pressure-driven hydraulic conductivities of excised rat aortas with both intact and denuded endothelia on the same vessel. We used them to calculate the effective intimal hydraulic conductivity, which is a combination of endothelial and subendothelial components. We observed well-correlated enhancements in aquaporin-1 expression and function in both hypertensive rat models as well as in aortas from normotensive rats whose expression was upregulated by 2 h of forskolin treatment. Upregulated aquaporin-1 expression and function may be a response to hypertension that critically determines conduit artery vessel wall viability and long-term susceptibility to atherosclerosis.NEW & NOTEWORTHY The aortic endothelia of two high-renin hypertensive rat models express greater than two times the aquaporin-1 and, at low pressures, have greater than two times the endothelial hydraulic conductivity of normotensive rats. Data are consistent with theory predicting that higher endothelial aquaporin-1 expression raises the critical pressure for subendothelial intima compression and for artery wall hydraulic conductivity to drop.
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Affiliation(s)
- Jimmy Toussaint
- 1Department of Chemical Engineering, City College of the City University of New York, New York, New York; ,4Wellman Center for Photomedicine, Harvard Medical School, Massachusetts General Hospital, Boston, Massachusetts;
| | - Chirag Bharavi Raval
- 1Department of Chemical Engineering, City College of the City University of New York, New York, New York; ,2Department of Biomedical Engineering, City College of the City University of New York, New York, New York;
| | - Tieuvi Nguyen
- 2Department of Biomedical Engineering, City College of the City University of New York, New York, New York;
| | - Hadi Fadaifard
- 3Department of Computer Science, City College of the City University of New York, New York, New York;
| | - Shripad Joshi
- 1Department of Chemical Engineering, City College of the City University of New York, New York, New York;
| | - George Wolberg
- 3Department of Computer Science, City College of the City University of New York, New York, New York;
| | - Steven Quarfordt
- 1Department of Chemical Engineering, City College of the City University of New York, New York, New York;
| | - Kung-ming Jan
- 5Department of Medicine, Columbia University College of Physicians and Surgeons, New York, New York; and
| | - David S. Rumschitzki
- 1Department of Chemical Engineering, City College of the City University of New York, New York, New York; ,5Department of Medicine, Columbia University College of Physicians and Surgeons, New York, New York; and ,6Biology (Molecular, Cellular, and Developmental Biology) and Chemistry (Biophysics) Departments, The Graduate School and University Center, City University of New York, New York, New York
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Tao X, Li K, Wang J, Zhang L, Li W, Kan B, Yu G, Jian X. Tetramethylpyrazine can ameliorate hepatocellular mitochondrial dysfunction by decreasing the inflammatory response and increasing AQP8 protein expression in septic rats. EUR J INFLAMM 2017. [DOI: 10.1177/1721727x17731003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Sepsis, which could lead to mitochondrial dysfunction and cellular energy loss, always induces acute liver injury and has a high mortality rate. Tetramethylpyrazine (TMP) is an active extract from the Chinese herb Ligusticum chuanxiong and exhibits anti-sepsis activity. In this study, a rat sepsis model was first established via cecal ligation and puncture (CLP). Then, 48 Sprague Dawley male rats were randomly divided into four groups (12 rats in each group): control group (C), sepsis group (S), TMP treatment group (T), and TMP prevention group (P). Serum aspartate aminotransferase (AST), serum alanine aminotransferase (ALT), mitochondrial aspartate aminotransferase (mAST), and adenosine triphosphate (ATP) levels and mitochondrial membrane potential (MMP) were measured and used as indicators of hepatic dysfunction severity and mitochondrial function. In addition, the activities of Na+-K+-ATPase, Mg2+-ATPase, Ca2+-ATPase, and Ca2+-Mg2+-ATPase in the mitochondrial membrane, the expression level of AQP8 and some inflammatory factors, and the level of oxidative stress were measured to explore potential mechanisms. We found that AQP8 accepts signals from inflammatory factors upon stimulation and during various infections, and low AQP8 expression levels could result in further downstream mitochondrial dysfunction. In conclusion, our data demonstrated that TMP could ameliorate hepatocellular mitochondrial dysfunction by decreasing the inflammatory response and increasing AQP8 protein expression.
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Affiliation(s)
- Xiaogen Tao
- Department of Poisoning and Occupational Diseases, Qilu Hospital of Shandong University, Jinan, China
- Intensive Care Unit (ICU), Anhui Provincial Hospital Affiliated Anhui Medical University, Hefei, China
| | - Kun Li
- Intensive Care Unit (ICU), Anhui Provincial Hospital Affiliated Anhui Medical University, Hefei, China
| | - Jinquan Wang
- Intensive Care Unit (ICU), Anhui Provincial Hospital Affiliated Anhui Medical University, Hefei, China
| | - Lin Zhang
- Intensive Care Unit (ICU), Anhui Provincial Hospital Affiliated Anhui Medical University, Hefei, China
| | - Wei Li
- School of Pharmacy, University College London, London, UK
| | - Baotian Kan
- Department of Poisoning and Occupational Diseases, Qilu Hospital of Shandong University, Jinan, China
| | - Guangcai Yu
- Department of Poisoning and Occupational Diseases, Qilu Hospital of Shandong University, Jinan, China
| | - Xiangdong Jian
- Department of Poisoning and Occupational Diseases, Qilu Hospital of Shandong University, Jinan, China
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Sutka M, Amodeo G, Ozu M. Plant and animal aquaporins crosstalk: what can be revealed from distinct perspectives. Biophys Rev 2017; 9:545-562. [PMID: 28871493 DOI: 10.1007/s12551-017-0313-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 08/02/2017] [Indexed: 01/03/2023] Open
Abstract
Aquaporins (AQPs) can be revisited from a distinct and complementary perspective: the outcome from analyzing them from both plant and animal studies. (1) The approach in the study. Diversity found in both kingdoms contrasts with the limited number of crystal structures determined within each group. While the structure of almost half of mammal AQPs was resolved, only a few were resolved in plants. Strikingly, the animal structures resolved are mainly derived from the AQP2-lineage, due to their important roles in water homeostasis regulation in humans. The difference could be attributed to the approach: relevance in animal research is emphasized on pathology and in consequence drug screening that can lead to potential inhibitors, enhancers and/or regulators. By contrast, studies on plants have been mainly focused on the physiological role that AQPs play in growth, development and stress tolerance. (2) The transport capacity. Besides the well-described AQPs with high water transport capacity, large amount of evidence confirms that certain plant AQPs can carry a large list of small solutes. So far, animal AQP list is more restricted. In both kingdoms, there is a great amount of evidence on gas transport, although there is still an unsolved controversy around gas translocation as well as the role of the central pore of the tetramer. (3) More roles than expected. We found it remarkable that the view of AQPs as specific channels has evolved first toward simple transporters to molecules that can experience conformational changes triggered by biochemical and/or mechanical signals, turning them also into signaling components and/or behave as osmosensor molecules.
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Affiliation(s)
- Moira Sutka
- Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires e Instituto de Biodiversidad y Biología Experimental, Universidad de Buenos Aires y Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Gabriela Amodeo
- Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires e Instituto de Biodiversidad y Biología Experimental, Universidad de Buenos Aires y Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina.
| | - Marcelo Ozu
- Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires e Instituto de Biodiversidad y Biología Experimental, Universidad de Buenos Aires y Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina.
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18
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Wintmo P, Johansen SH, Hansen PBL, Lindholt JS, Urbonavicius S, Rasmussen LM, Bie P, Jensen BL, Stubbe J. The water channel AQP1 is expressed in human atherosclerotic vascular lesions and AQP1 deficiency augments angiotensin II-induced atherosclerosis in mice. Acta Physiol (Oxf) 2017; 220:446-460. [PMID: 28129470 DOI: 10.1111/apha.12853] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Revised: 09/29/2016] [Accepted: 01/22/2017] [Indexed: 12/22/2022]
Abstract
AIM The water channel aquaporin 1 (AQP1) promotes endothelial cell migration. It was hypothesized that AQP1 promotes neovascularization and growth of atherosclerotic plaques. METHODS AQP1 immunoreactivity and protein abundance was examined in human and murine atherosclerotic lesions and aortic aneurysms. Apolipoprotein E (ApoE) knockout (-/-) and AQP1-/-ApoE-/- mice were developed and fed Western diet (WD) for 8 and 16 weeks to accelerate the atherosclerosis process. In ApoE-/- and AQP1-/-ApoE-/- mice abdominal aortic aneurysms (AAA) were induced by angiotensin II (ANGII) infusion by osmotic minipumps for 4 weeks. RESULTS In human atherosclerotic lesions and AAA, AQP1 immunoreactive protein was associated with intralesional small vessels. In ApoE-/- mouse aorta, APQ1 mRNA levels were increased with time on WD (n = 7-9, P < 0.003). Both in murine lesions at the aortic root and in the abdominal aortic aneurysmal wall, AQP1 immunoreactivity was associated with microvascular structures. The atherosclerotic lesion burden was enhanced significantly in ANGII-infused AQP1-/-ApoE-/- mice compared with ApoE-/- mice, but neither incidence nor progression of AAA was different. The aortic lesion burden increased with time on WD but was not different between ApoE-/- and AQP1-/-ApoE-/- mice at either 8 or 16 weeks (n = 13-15). Baseline blood pressure and ANGII-induced hypertension were not different between genotypes. CONCLUSION AQP1 is expressed in atherosclerotic lesion neovasculature in human and mouse arteries and AQP1 deficiency augments lesion development in ANGII-promoted atherosclerosis in mice. Normal function of AQP1 affords cardiovascular protection.
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Affiliation(s)
- P. Wintmo
- Department of Cardiovascular and Renal Research; Institute of Molecular Biology; University of Southern Denmark; Odense C Denmark
| | - S. H. Johansen
- Department of Cardiovascular and Renal Research; Institute of Molecular Biology; University of Southern Denmark; Odense C Denmark
| | - P. B. L. Hansen
- Department of Cardiovascular and Renal Research; Institute of Molecular Biology; University of Southern Denmark; Odense C Denmark
| | - J. S. Lindholt
- Department of Cardiothoracic and Vascular Surgery T; University Hospital of Odense; Odense C Denmark
| | - S. Urbonavicius
- Cardiovascular Research Centre; Viborg Hospital; Viborg Denmark
| | - L. M. Rasmussen
- Department of Cardiovascular and Renal Research; Institute of Molecular Biology; University of Southern Denmark; Odense C Denmark
- Department of Clinical Biochemistry and Pharmacology; Odense University Hospital; Odense C Denmark
| | - P. Bie
- Department of Cardiovascular and Renal Research; Institute of Molecular Biology; University of Southern Denmark; Odense C Denmark
| | - B. L. Jensen
- Department of Cardiovascular and Renal Research; Institute of Molecular Biology; University of Southern Denmark; Odense C Denmark
| | - J. Stubbe
- Department of Cardiovascular and Renal Research; Institute of Molecular Biology; University of Southern Denmark; Odense C Denmark
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Al-Samir S, Goossens D, Cartron JP, Nielsen S, Scherbarth F, Steinlechner S, Gros G, Endeward V. Maximal Oxygen Consumption Is Reduced in Aquaporin-1 Knockout Mice. Front Physiol 2016; 7:347. [PMID: 27559317 PMCID: PMC4978734 DOI: 10.3389/fphys.2016.00347] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 07/29/2016] [Indexed: 12/01/2022] Open
Abstract
We have measured maximal oxygen consumption (V˙O2,max) of mice lacking one or two of the established mouse red-cell CO2 channels AQP1, AQP9, and Rhag. We intended to study whether these proteins, by acting as channels for O2, determine O2 exchange in the lung and in the periphery. We found that V˙O2,max as determined by the Helox technique is reduced by ~16%, when AQP1 is knocked out, but not when AQP9 or Rhag are lacking. This figure holds for animals respiring normoxic as well as hypoxic gas mixtures. To see whether the reduction of V˙O2,max is due to impaired O2 uptake in the lung, we measured carotid arterial O2 saturation (SO2) by pulse oximetry. Neither under normoxic (inspiratory O2 21%) nor under hypoxic conditions (11% O2) is there a difference in SO2 between AQP1null and WT mice, suggesting that AQP1 is not critical for O2 uptake in the lung. The fact that the % reduction of V˙O2,max is identical in normoxia and hypoxia indicates moreover that the limitation of V˙O2,max is not due to an O2 diffusion problem, neither in the lung nor in the periphery. Instead, it appears likely that AQP1null animals exhibit a reduced V˙O2,max due to the reduced wall thickness and muscle mass of the left ventricles of their hearts, as reported previously. We conclude that very likely the properties of the hearts of AQP1 knockout mice cause a reduced maximal cardiac output and thus cause a reduced V˙O2,max, which constitutes a new phenotype of these mice.
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Affiliation(s)
- Samer Al-Samir
- Vegetative Physiologie 4220, Abt. Molekular-und Zellphysiologie, Medizinische Hochschule Hannover Hannover, Germany
| | - Dominique Goossens
- Institut National de la Transfusion Sanguine-Institut National de la Santé et de la Recherche Médicale UMR_S1134 Paris, France
| | - Jean-Pierre Cartron
- Institut National de la Transfusion Sanguine-Institut National de la Santé et de la Recherche Médicale UMR_S1134 Paris, France
| | - Søren Nielsen
- Biomedicine, Department Health Science and Technology, Aalborg University Aalborg, Denmark
| | - Frank Scherbarth
- Institut für Zoologie, Tierärztliche Hochschule Hannover Hannover, Germany
| | | | - Gerolf Gros
- Vegetative Physiologie 4220, Abt. Molekular-und Zellphysiologie, Medizinische Hochschule Hannover Hannover, Germany
| | - Volker Endeward
- Vegetative Physiologie 4220, Abt. Molekular-und Zellphysiologie, Medizinische Hochschule Hannover Hannover, Germany
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Netti VA, Iovane AN, Vatrella MC, Zotta E, Fellet AL, Balaszczuk AM. Effects of nitric oxide system and osmotic stress on Aquaporin-1 in the postnatal heart. Biomed Pharmacother 2016; 81:225-234. [DOI: 10.1016/j.biopha.2016.03.050] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 03/31/2016] [Accepted: 03/31/2016] [Indexed: 11/25/2022] Open
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Investigation of the effects of aging on the expression of aquaporin 1 and aquaporin 4 protein in heart tissue. Anatol J Cardiol 2016; 17:18-23. [PMID: 27443479 PMCID: PMC5324856 DOI: 10.14744/anatoljcardiol.2016.7033] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Objective: Aquaporin (AQP) 1 and AQP 4 are expressed in human heart and several studies have been focused on these two aquaporins. For this purpose, the present study is aimed to research the effects of aging on AQP 1 and AQP 4 in heart tissue. Methods: In this study, 14 Balb/C type white mice were used. Animals were divided into two equal groups. Group I consisted of 2-month-old young animals (n=7), and group II consisted of 18-month-old animals (n=7). To determine the AQP1 and AQP4 expression in the myocardium, the heart tissue was removed to perform western blotting and immunohistochemical and histopathological evaluations. Results: Muscle fibers of the heart in aged animals were more irregular and loosely organized in hematoxylin–eosin (H&E) stained sections. H-score analysis revealed that AQP1 and AQP4 immunoreactivity significantly increased in heart tissues of old mice compared with those of young mice (p<0.001). In addition, AQP1 and AQP4 protein expressions in the tissues of old animals were increased significantly according to western blot analysis (p=0.018 and p<0.001 for AQP1 and AQP4, respectively). Conclusion: Increased AQP1 and AQP4 levels in the heart tissue may be correlated with the maintenance of water and electrolytes balance, which decreases with aging. In this context, it might be the result of a compensatory response to decreased AQP4 functions. In addition, this increase with aging as demonstrated in our study might be one of the factors that increases the tendency of ischemia in elder people.
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Al-Samir S, Wang Y, Meissner JD, Gros G, Endeward V. Cardiac Morphology and Function, and Blood Gas Transport in Aquaporin-1 Knockout Mice. Front Physiol 2016; 7:181. [PMID: 27252655 PMCID: PMC4878313 DOI: 10.3389/fphys.2016.00181] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2016] [Accepted: 05/06/2016] [Indexed: 12/24/2022] Open
Abstract
We have studied cardiac and respiratory functions of aquaporin-1-deficient mice by the Pressure-Volume-loop technique and by blood gas analysis. In addition, the morphological properties of the animals' hearts were analyzed. In anesthesia under maximal dobutamine stimulation, the mice exhibit a moderately elevated heart rate of < 600 min−1 and an O2 consumption of ~0.6 ml/min/g, which is about twice the basal rate. In this state, which is similar to the resting state of the conscious animal, all cardiac functions including stroke volume and cardiac output exhibited resting values and were identical between deficient and wildtype animals. Likewise, pulmonary and peripheral exchange of O2 and CO2 were normal. In contrast, several morphological parameters of the heart tissue of deficient mice were altered: (1) left ventricular wall thickness was reduced by 12%, (2) left ventricular mass, normalized to tibia length, was reduced by 10–20%, (3) cardiac muscle fiber cross sectional area was decreased by 17%, and (4) capillary density was diminished by 10%. As the P-V-loop technique yielded normal end-diastolic and end-systolic left ventricular volumes, the deficient hearts are characterized by thin ventricular walls in combination with normal intraventricular volumes. The aquaporin-1-deficient heart thus seems to be at a disadvantage compared to the wild-type heart by a reduced left-ventricular wall thickness and an increased diffusion distance between blood capillaries and muscle mitochondria. While under the present quasi-resting conditions these morphological alterations have no consequences for cardiac function, we expect that the deficient hearts will show a reduced maximal cardiac output.
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Affiliation(s)
- Samer Al-Samir
- Abteilung Molekular- und Zellphysiologie, AG Vegetative Physiologie 4220, Medizinische Hochschule Hannover Hannover, Germany
| | - Yong Wang
- Division Molecular and Translational Cardiology, Department Cardiology and Angiology, Medizinische Hochschule Hannover Hannover, Germany
| | - Joachim D Meissner
- Abteilung Molekular- und Zellphysiologie, AG Vegetative Physiologie 4220, Medizinische Hochschule Hannover Hannover, Germany
| | - Gerolf Gros
- Abteilung Molekular- und Zellphysiologie, AG Vegetative Physiologie 4220, Medizinische Hochschule Hannover Hannover, Germany
| | - Volker Endeward
- Abteilung Molekular- und Zellphysiologie, AG Vegetative Physiologie 4220, Medizinische Hochschule Hannover Hannover, Germany
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Fontijn RD, Volger OL, van der Pouw-Kraan TC, Doddaballapur A, Leyen T, Baggen JM, Boon RA, Horrevoets AJG. Expression of Nitric Oxide-Transporting Aquaporin-1 Is Controlled by KLF2 and Marks Non-Activated Endothelium In Vivo. PLoS One 2015; 10:e0145777. [PMID: 26717516 PMCID: PMC4696733 DOI: 10.1371/journal.pone.0145777] [Citation(s) in RCA: 18] [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: 09/28/2015] [Accepted: 12/08/2015] [Indexed: 02/07/2023] Open
Abstract
The flow-responsive transcription factor Krüppel-like factor 2 (KLF2) maintains an anti-coagulant, anti-inflammatory endothelium with sufficient nitric oxide (NO)-bioavailability. In this study, we aimed to explore, both in vitro and in human vascular tissue, expression of the NO-transporting transmembrane pore aquaporin-1 (AQP1) and its regulation by atheroprotective KLF2 and atherogenic inflammatory stimuli. In silico analysis of gene expression profiles from studies that assessed the effects of KLF2 overexpression in vitro and atherosclerosis in vivo on endothelial cells, identifies AQP1 as KLF2 downstream gene with elevated expression in the plaque-free vessel wall. Biomechanical and pharmaceutical induction of KLF2 in vitro is accompanied by induction of AQP1. Chromosome immunoprecipitation (CHIP) confirms binding of KLF2 to the AQP1 promoter. Inflammatory stimulation of endothelial cells leads to repression of AQP1 transcription, which is restrained by KLF2 overexpression. Immunohistochemistry reveals expression of aquaporin-1 in non-activated endothelium overlying macrophage-poor intimae, irrespective whether these intimae are characterized as being plaque-free or as containing advanced plaque. We conclude that AQP1 expression is subject to KLF2-mediated positive regulation by atheroprotective shear stress and is downregulated under inflammatory conditions both in vitro and in vivo. Thus, endothelial expression of AQP1 characterizes the atheroprotected, non-inflamed vessel wall. Our data provide support for a continuous role of KLF2 in stabilizing the vessel wall via co-temporal expression of eNOS and AQP1 both preceding and during the pathogenesis of atherosclerosis.
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Affiliation(s)
- Ruud D. Fontijn
- Department of Molecular Cell Biology and Immunology, VU Medical Center, Amsterdam, the Netherlands
| | - Oscar L. Volger
- Department of Molecular Cell Biology and Immunology, VU Medical Center, Amsterdam, the Netherlands
| | | | - Anuradha Doddaballapur
- Institute for Cardiovascular Regeneration, Centre of Molecular Medicine, Goethe University, Frankfurt am Main, Germany
| | - Thomas Leyen
- Department of Molecular Cell Biology and Immunology, VU Medical Center, Amsterdam, the Netherlands
| | - Josefien M. Baggen
- Department of Molecular Cell Biology and Immunology, VU Medical Center, Amsterdam, the Netherlands
| | - Reinier A. Boon
- Institute for Cardiovascular Regeneration, Centre of Molecular Medicine, Goethe University, Frankfurt am Main, Germany
| | - Anton J. G. Horrevoets
- Department of Molecular Cell Biology and Immunology, VU Medical Center, Amsterdam, the Netherlands
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Wang L, Shan Y, Ye Y, Jin L, Zhuo Q, Xiong X, Zhao X, Lin L, Miao J. COX-2 inhibition attenuates lung injury induced by skeletal muscle ischemia reperfusion in rats. Int Immunopharmacol 2015; 31:116-22. [PMID: 26724476 DOI: 10.1016/j.intimp.2015.12.019] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2015] [Revised: 11/30/2015] [Accepted: 12/16/2015] [Indexed: 11/30/2022]
Abstract
BACKGROUND Skeletal muscle ischemia reperfusion accounts for high morbidity and mortality, and cyclooxygenase (COX)-2 is implicated in causing muscle damage. Downregulation of aquaporin-1 (AQP-1) transmembrane protein is implicated in skeletal muscle ischemia reperfusion induced remote lung injury. The expression of COX-2 in lung tissue and the effect of COX-2 inhibition on AQP-1 expression and lung injury during skeletal muscle ischemia reperfusion are not known. We investigated the role of COX-2 in lung injury induced by skeletal muscle ischemia reperfusion in rats and evaluated the effects of NS-398, a specific COX-2 inhibitor. METHODS Twenty-four Sprague Dawley rats were randomized into 4 groups: sham group (SM group), sham+NS-398 group (SN group), ischemia reperfusion group (IR group) and ischemia reperfusion+NS-398 group (IN group). Rats in the IR and IN groups were subjected to 3h of bilateral ischemia followed by 6h of reperfusion in hindlimbs, and intravenous NS-398 8 mg/kg was administered in the IN group. In the SM and SN groups, rubber bands were in place without inflation. At the end of reperfusion, myeloperoxidase (MPO) activity, COX-2 and AQP-1 protein expression in lung tissue, PGE2 metabolite (PGEM), tumor necrosis factor (TNF)-α and interleukin (IL)-1β levels in bronchoalveolar lavage (BAL) fluid were assessed. Histological changes in lung and muscle tissues and wet/dry (W/D) ratio were also evaluated. RESULTS MPO activity, COX-2 expression, W/D ratio in lung tissue, and PGEM, TNF-α and IL-1β levels in BAL fluid were significantly increased, while AQP-1 protein expression downregulated in the IR group as compared to that in the SM group (P<0.05). These changes were remarkably mitigated in the IN group (P<0.05). NS-398 treatment also alleviated histological signs of lung and skeletal muscle injury. CONCLUSION COX-2 protein expression was upregulated in lung tissue in response to skeletal muscle ischemia reperfusion. COX-2 inhibition may modulate pulmonary AQP-1 expression and attenuate lung injury.
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Affiliation(s)
- Liangrong Wang
- Department of Anesthesiology, The First Affiliated Hospital of Wenzhou Medical University, People's Republic of China.
| | - Yuanlu Shan
- Department of Anesthesiology, The First Affiliated Hospital of Wenzhou Medical University, People's Republic of China.
| | - Yuzhu Ye
- Department of Anesthesiology, The First Affiliated Hospital of Wenzhou Medical University, People's Republic of China.
| | - Lida Jin
- Department of Anesthesiology, The First Affiliated Hospital of Wenzhou Medical University, People's Republic of China.
| | - Qian Zhuo
- Department of Anesthesiology, The First Affiliated Hospital of Wenzhou Medical University, People's Republic of China.
| | - Xiangqing Xiong
- Department of Anesthesiology, The First Affiliated Hospital of Wenzhou Medical University, People's Republic of China.
| | - Xiyue Zhao
- Department of Anesthesiology, The First Affiliated Hospital of Wenzhou Medical University, People's Republic of China.
| | - Lina Lin
- Department of Anesthesiology, The First Affiliated Hospital of Wenzhou Medical University, People's Republic of China.
| | - JianXia Miao
- Department of Anesthesiology, The First Affiliated Hospital of Wenzhou Medical University, People's Republic of China.
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Odnoshivkina UG, Sytchev VI, Nurullin LF, Giniatullin AR, Zefirov AL, Petrov AM. β2-adrenoceptor agonist-evoked reactive oxygen species generation in mouse atria: implication in delayed inotropic effect. Eur J Pharmacol 2015; 765:140-53. [PMID: 26297975 DOI: 10.1016/j.ejphar.2015.08.020] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Revised: 08/05/2015] [Accepted: 08/17/2015] [Indexed: 12/20/2022]
Abstract
Fenoterol, a β2-adrenoceptor agonist, has anti-apoptotic action in cardiomyocytes and induces a specific pattern of downstream signaling. We have previously reported that exposure to fenoterol (5 μM) results in a delayed positive inotropic effect which is related to changes in both Ca2+ transient and NO. Here, the changes in reactive oxygen species (ROS) production in response to the fenoterol administration and the involvement of ROS in effect of this agonist on contractility were investigated in mouse isolated atria. Stimulation of β2-adrenoceptor increases a level of extracellular ROS, while intracellular ROS level rises only after removal of fenoterol from the bath. NADPH-oxidase inhibitor (apocynin) prevents the increase in ROS production and the Nox2 isoform is immunofluorescently colocalized with β2-adrenoceptor at the atrial myocytes. Treatments with antioxidants (N-acetyl-L-cysteine, NADPH inhibitors, exogenous catalases) significantly inhibit the fenoterol induced increase in the contraction amplitude, probably by attenuating Ca2+ transient and up-regulating NO production. ROS generated in a β2-adrenoceptor-dependent manner can potentiate the activity of some Ca2+ channels. Indeed, inhibition of ryanodine receptors, TRPV-or L-type Ca2+- channels shows a similar efficacy in reduction of positive inotropic effect of both fenoterol and H2O2. In addition, detection of mitochondrial ROS indicates that fenoterol triggers a slow increase in ROS which is prevented by rotenone, but rotenone has no impact on the inotropic effect of fenoterol. We suggest that stimulation of β2-adrenoceptor with fenoterol causes the activation of NADPH-oxidase and after the agonist removal extracellularly generated ROS penetrates into the cell, increasing the atrial contractions probably via Ca2+ channels.
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Affiliation(s)
- Ulia G Odnoshivkina
- Department of Normal Physiology, Kazan State Medical University, Butlerova st., 49, Kazan 420012, Russia
| | - Vaycheslav I Sytchev
- Department of Normal Physiology, Kazan State Medical University, Butlerova st., 49, Kazan 420012, Russia
| | - Leniz F Nurullin
- Kazan Institute of Biochemistry and Biophysics, Kazan Scientific Center of Russian Academy of Sciences, Laboratory of Biophysics of Synaptic Processes, Lobatchevsky str. 2/31, P.O. 30, Kazan 420111, Russia
| | - Arthur R Giniatullin
- Department of Normal Physiology, Kazan State Medical University, Butlerova st., 49, Kazan 420012, Russia
| | - Andrei L Zefirov
- Department of Normal Physiology, Kazan State Medical University, Butlerova st., 49, Kazan 420012, Russia
| | - Alexey M Petrov
- Department of Normal Physiology, Kazan State Medical University, Butlerova st., 49, Kazan 420012, Russia.
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Nguyen T, Toussaint J, Xue Y, Raval C, Cancel L, Russell S, Shou Y, Sedes O, Sun Y, Yakobov R, Tarbell JM, Jan KM, Rumschitzki DS. Aquaporin-1 facilitates pressure-driven water flow across the aortic endothelium. Am J Physiol Heart Circ Physiol 2015; 308:H1051-64. [PMID: 25659484 PMCID: PMC4551120 DOI: 10.1152/ajpheart.00499.2014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Accepted: 01/23/2015] [Indexed: 01/23/2023]
Abstract
Aquaporin-1, a ubiquitous water channel membrane protein, is a major contributor to cell membrane osmotic water permeability. Arteries are the physiological system where hydrostatic dominates osmotic pressure differences. In the present study, we show that the walls of large conduit arteries constitute the first example where hydrostatic pressure drives aquaporin-1-mediated transcellular/transendothelial flow. We studied cultured aortic endothelial cell monolayers and excised whole aortas of male Sprague-Dawley rats with intact and inhibited aquaporin-1 activity and with normal and knocked down aquaporin-1 expression. We subjected these systems to transmural hydrostatic pressure differences at zero osmotic pressure differences. Impaired aquaporin-1 endothelia consistently showed reduced engineering flow metrics (transendothelial water flux and hydraulic conductivity). In vitro experiments with tracers that only cross the endothelium paracellularly showed that changes in junctional transport cannot explain these reductions. Percent reductions in whole aortic wall hydraulic conductivity with either chemical blocking or knockdown of aquaporin-1 differed at low and high transmural pressures. This observation highlights how aquaporin-1 expression likely directly influences aortic wall mechanics by changing the critical transmural pressure at which its sparse subendothelial intima compresses. Such compression increases transwall flow resistance. Our endothelial and historic erythrocyte membrane aquaporin density estimates were consistent. In conclusion, aquaporin-1 significantly contributes to hydrostatic pressure-driven water transport across aortic endothelial monolayers, both in culture and in whole rat aortas. This transport, and parallel junctional flow, can dilute solutes that entered the wall paracellularly or through endothelial monolayer disruptions. Lower atherogenic precursor solute concentrations may slow their intimal entrainment kinetics.
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Affiliation(s)
- Tieuvi Nguyen
- Department of Biomedical Engineering, City College of the City University of New York, New York, New York
| | - Jimmy Toussaint
- Department of Chemical Engineering, City College of the City University of New York, New York, New York
| | - Yan Xue
- Department of Chemical Engineering, City College of the City University of New York, New York, New York; Biology Department, City College and GSUC of The City College of New York, New York, New York; and
| | - Chirag Raval
- Department of Biomedical Engineering, City College of the City University of New York, New York, New York
| | - Limary Cancel
- Department of Biomedical Engineering, City College of the City University of New York, New York, New York
| | - Stewart Russell
- Department of Biomedical Engineering, City College of the City University of New York, New York, New York
| | - Yixin Shou
- Department of Chemical Engineering, City College of the City University of New York, New York, New York
| | - Omer Sedes
- Department of Chemical Engineering, City College of the City University of New York, New York, New York
| | - Yu Sun
- Department of Chemical Engineering, City College of the City University of New York, New York, New York
| | - Roman Yakobov
- Department of Chemical Engineering, City College of the City University of New York, New York, New York
| | - John M Tarbell
- Department of Biomedical Engineering, City College of the City University of New York, New York, New York
| | - Kung-ming Jan
- Department of Medicine, College of Physicians and Surgeons of Columbia University, New York, New York
| | - David S Rumschitzki
- Department of Chemical Engineering, City College of the City University of New York, New York, New York; Biology Department, City College and GSUC of The City College of New York, New York, New York; and Department of Medicine, College of Physicians and Surgeons of Columbia University, New York, New York
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Mobasheri A, Barrett-Jolley R. Aquaporin water channels in the mammary gland: from physiology to pathophysiology and neoplasia. J Mammary Gland Biol Neoplasia 2014; 19:91-102. [PMID: 24338153 PMCID: PMC3947960 DOI: 10.1007/s10911-013-9312-6] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Accepted: 11/13/2013] [Indexed: 12/21/2022] Open
Abstract
Aquaporins are membrane proteins that play fundamental roles in water and small solute transport across epithelial and endothelial barriers. Recent studies suggest that several aquaporin proteins are present in the mammary gland. Immunohistochemical techniques have confirmed the presence of aquaporin 1 (AQP1) and AQP3 water channels in rat, mouse, bovine and human mammary glands. Studies suggest that in addition to AQP1 and AQP3 AQP4, AQP5 and AQP7 proteins are expressed in different locations in the mammary gland. Aquaporins play key roles in tumor biology and are involved in cell growth, migration and formation of ascites via increased water permeability of micro-vessels. Emerging evidence suggests that expression of these proteins is altered in mammary tumors and in breast cancer cell lines although it is not yet clear whether this is a cause or a consequence of neoplastic development. This review analyzes the expression and potential functional roles of aquaporin water channels in the mammary gland. The physiological mechanisms involved in the transport of water and small solutes across mammary endothelial and epithelial barriers are discussed in the context of milk production and lactation. This paper also reviews papers from the recent cancer literature that implicate aquaporins in mammary neoplasia.
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Affiliation(s)
- Ali Mobasheri
- School of Pharmacy, University of Bradford, Richmond Road, Bradford, BD7 1DP, UK,
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Abstract
Aquaporins (AQPs) are a family of membrane water channels that basically function as regulators of intracellular and intercellular water flow. To date, thirteen aquaporins have been characterized. They are distributed wildly in specific cell types in multiple organs and tissues. Each AQP channel consists of six membrane-spanning alpha-helices that have a central water-transporting pore. Four AQP monomers assemble to form tetramers, which are the functional units in the membrane. Some of AQPs also transport urea, glycerol, ammonia, hydrogen peroxide, and gas molecules. AQP-mediated osmotic water transport across epithelial plasma membranes facilitates transcellular fluid transport and thus water reabsorption. AQP-mediated urea and glycerol transport is involved in energy metabolism and epidermal hydration. AQP-mediated CO2 and NH3 transport across membrane maintains intracellular acid-base homeostasis. AQPs are also involved in the pathophysiology of a wide range of human diseases (including water disbalance in kidney and brain, neuroinflammatory disease, obesity, and cancer). Further work is required to determine whether aquaporins are viable therapeutic targets or reliable diagnostic and prognostic biomarkers.
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