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Zhang Y, Liu Y, Sun J, Zhang W, Guo Z, Ma Q. Arachidonic acid metabolism in health and disease. MedComm (Beijing) 2023; 4:e363. [PMID: 37746665 PMCID: PMC10511835 DOI: 10.1002/mco2.363] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Revised: 08/13/2023] [Accepted: 08/17/2023] [Indexed: 09/26/2023] Open
Abstract
Arachidonic acid (AA), an n-6 essential fatty acid, is a major component of mammalian cells and can be released by phospholipase A2. Accumulating evidence indicates that AA plays essential biochemical roles, as it is the direct precursor of bioactive lipid metabolites of eicosanoids such as prostaglandins, leukotrienes, and epoxyeicosatrienoic acid obtained from three distinct enzymatic metabolic pathways: the cyclooxygenase pathway, lipoxygenase pathway, and cytochrome P450 pathway. AA metabolism is involved not only in cell differentiation, tissue development, and organ function but also in the progression of diseases, such as hepatic fibrosis, neurodegeneration, obesity, diabetes, and cancers. These eicosanoids are generally considered proinflammatory molecules, as they can trigger oxidative stress and stimulate the immune response. Therefore, interventions in AA metabolic pathways are effective ways to manage inflammatory-related diseases in the clinic. Currently, inhibitors targeting enzymes related to AA metabolic pathways are an important area of drug discovery. Moreover, many advances have also been made in clinical studies of AA metabolic inhibitors in combination with chemotherapy and immunotherapy. Herein, we review the discovery of AA and focus on AA metabolism in relation to health and diseases. Furthermore, inhibitors targeting AA metabolism are summarized, and potential clinical applications are discussed.
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Affiliation(s)
- Yiran Zhang
- Department of Orthopedic SurgeryOrthopedic Oncology InstituteThe Second Affiliated Hospital of Air Force Medical UniversityXi'anChina
| | - Yingxiang Liu
- Department of Orthopedic SurgeryOrthopedic Oncology InstituteThe Second Affiliated Hospital of Air Force Medical UniversityXi'anChina
| | - Jin Sun
- Department of Orthopedic SurgeryOrthopedic Oncology InstituteThe Second Affiliated Hospital of Air Force Medical UniversityXi'anChina
| | - Wei Zhang
- Department of PathologyThe Second Affiliated Hospital of Air Force Medical UniversityXi'anChina
| | - Zheng Guo
- Department of Orthopedic SurgeryOrthopedic Oncology InstituteThe Second Affiliated Hospital of Air Force Medical UniversityXi'anChina
| | - Qiong Ma
- Department of Orthopedic SurgeryOrthopedic Oncology InstituteThe Second Affiliated Hospital of Air Force Medical UniversityXi'anChina
- Department of PathologyThe Second Affiliated Hospital of Air Force Medical UniversityXi'anChina
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2
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Fuchs MAA, Schrankl J, Leupold C, Wagner C, Kurtz A, Broeker KAE. Intact prostaglandin signaling through EP2 and EP4 receptors in stromal progenitor cells is required for normal development of the renal cortex in mice. Am J Physiol Renal Physiol 2022; 322:F295-F307. [PMID: 35037469 DOI: 10.1152/ajprenal.00414.2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 01/10/2022] [Indexed: 01/20/2023] Open
Abstract
Cyclooxygenase (Cox) inhibitors are known to have severe side effects during renal development. These consist of reduced renal function, underdeveloped subcapsular glomeruli, interstitial fibrosis, and thinner cortical tissue. Global genetic deletion of Cox-2 mimics the phenotype observed after application of Cox inhibitors. This study aimed to investigate which cell types express Cox-2 and prostaglandin E2 receptors and what functions are mediated through this pathway during renal development. Expression of EP2 and EP4 mRNA was detected by RNAscope mainly in descendants of FoxD1+ stromal progenitors; EP1 and EP3, on the other hand, were expressed in tubules. Cox-2 mRNA was detected in medullary interstitial cells and macula densa cells. Functional investigations were performed with a cell-specific approach to delete Cox-2, EP2, and EP4 in FoxD1+ stromal progenitor cells. Our data show that Cox-2 expression in macula densa cells is sufficient to drive renal development. Deletion of EP2 or EP4 in FoxD1+ cells had no functional effect on renal development. Codeletion of EP2 and EP4 in FoxD1+ stromal cells, however, led to severe glomerular defects and a strong decline of glomerular filtration rate (1.316 ± 69.7 µL/min/100 g body wt in controls vs. 644.1 ± 64.58 µL/min/100 g body wt in FoxD1+/Cre EP2-/- EP4ff mice), similar to global deletion of Cox-2. Furthermore, EP2/EP4-deficient mice showed a significant increase in collagen production with a strong downregulation of renal renin expression. This study shows the distinct localization of EP receptors in mice. Functionally, we could identify EP2 and EP4 receptors in stromal FoxD1+ progenitor cells as essential receptor subtypes for normal renal development.NEW & NOTEWORTHY Cyclooxygenase-2 (Cox-2) produces prostaglandins that are essential for normal renal development. It is unclear in which cells Cox-2 and the receptors for prostaglandin E2 (EP receptors) are expressed during late nephrogenesis. This study identified the expression sites for EP subtypes and Cox-2 in neonatal mouse kidneys. Furthermore, it shows that stromal progenitor cells may require intact prostaglandin E2 signaling through EP2 and EP4 receptors for normal renal development.
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MESH Headings
- Animals
- Cyclooxygenase 2/genetics
- Cyclooxygenase 2/metabolism
- Forkhead Transcription Factors/genetics
- Forkhead Transcription Factors/metabolism
- Gene Expression Regulation, Developmental
- Kidney Cortex/cytology
- Kidney Cortex/enzymology
- Male
- Mice, Inbred C57BL
- Mice, Knockout
- Organogenesis
- Prostaglandins/metabolism
- Receptors, Prostaglandin E, EP2 Subtype/genetics
- Receptors, Prostaglandin E, EP2 Subtype/metabolism
- Receptors, Prostaglandin E, EP4 Subtype/genetics
- Receptors, Prostaglandin E, EP4 Subtype/metabolism
- Signal Transduction
- Stem Cells/metabolism
- Stromal Cells/enzymology
- Mice
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Affiliation(s)
| | - Julia Schrankl
- Institute of Physiology, University of Regensburg, Regensburg, Germany
| | - Christina Leupold
- Institute of Physiology, University of Regensburg, Regensburg, Germany
| | - Charlotte Wagner
- Institute of Physiology, University of Regensburg, Regensburg, Germany
| | - Armin Kurtz
- Institute of Physiology, University of Regensburg, Regensburg, Germany
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3
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Sharma M, Singh V, Sharma R, Koul A, McCarthy ET, Savin VJ, Joshi T, Srivastava T. Glomerular Biomechanical Stress and Lipid Mediators during Cellular Changes Leading to Chronic Kidney Disease. Biomedicines 2022; 10:407. [PMID: 35203616 PMCID: PMC8962328 DOI: 10.3390/biomedicines10020407] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Revised: 01/31/2022] [Accepted: 02/04/2022] [Indexed: 02/04/2023] Open
Abstract
Hyperfiltration is an important underlying cause of glomerular dysfunction associated with several systemic and intrinsic glomerular conditions leading to chronic kidney disease (CKD). These include obesity, diabetes, hypertension, focal segmental glomerulosclerosis (FSGS), congenital abnormalities and reduced renal mass (low nephron number). Hyperfiltration-associated biomechanical forces directly impact the cell membrane, generating tensile and fluid flow shear stresses in multiple segments of the nephron. Ongoing research suggests these biomechanical forces as the initial mediators of hyperfiltration-induced deterioration of podocyte structure and function leading to their detachment and irreplaceable loss from the glomerular filtration barrier. Membrane lipid-derived polyunsaturated fatty acids (PUFA) and their metabolites are potent transducers of biomechanical stress from the cell surface to intracellular compartments. Omega-6 and ω-3 long-chain PUFA from membrane phospholipids generate many versatile and autacoid oxylipins that modulate pro-inflammatory as well as anti-inflammatory autocrine and paracrine signaling. We advance the idea that lipid signaling molecules, related enzymes, metabolites and receptors are not just mediators of cellular stress but also potential targets for developing novel interventions. With the growing emphasis on lifestyle changes for wellness, dietary fatty acids are potential adjunct-therapeutics to minimize/treat hyperfiltration-induced progressive glomerular damage and CKD.
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Affiliation(s)
- Mukut Sharma
- Research and Development Service, Kansas City VA Medical Center, Kansas City, MO 64128, USA;
- Midwest Veterans’ Biomedical Research Foundation, Kansas City, MO 64128, USA; (A.K.); (V.J.S.); (T.S.)
- Department of Internal Medicine, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, MO 66160, USA;
| | - Vikas Singh
- Neurology, Kansas City VA Medical Center, Kansas City, MO 64128, USA;
| | - Ram Sharma
- Research and Development Service, Kansas City VA Medical Center, Kansas City, MO 64128, USA;
| | - Arnav Koul
- Midwest Veterans’ Biomedical Research Foundation, Kansas City, MO 64128, USA; (A.K.); (V.J.S.); (T.S.)
| | - Ellen T. McCarthy
- Department of Internal Medicine, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, MO 66160, USA;
| | - Virginia J. Savin
- Midwest Veterans’ Biomedical Research Foundation, Kansas City, MO 64128, USA; (A.K.); (V.J.S.); (T.S.)
| | - Trupti Joshi
- Department of Health Management and Informatics, University of Missouri, Columbia, MO 65201, USA;
| | - Tarak Srivastava
- Midwest Veterans’ Biomedical Research Foundation, Kansas City, MO 64128, USA; (A.K.); (V.J.S.); (T.S.)
- Section of Nephrology, Children’s Mercy Hospital and University of Missouri, Kansas City, MO 64108, USA
- Department of Oral and Craniofacial Sciences, School of Dentistry, University of Missouri, Kansas City, MO 64108, USA
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4
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Jin D, Zhong TP. Prostaglandin signaling in ciliogenesis and development. J Cell Physiol 2021; 237:2632-2643. [PMID: 34927727 DOI: 10.1002/jcp.30659] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 12/02/2021] [Accepted: 12/06/2021] [Indexed: 11/09/2022]
Abstract
Prostaglandin (PG) signaling regulates a wide variety of physiological and pathological processes, including body temperature, cardiovascular homeostasis, reproduction, and inflammation. Recent studies have revealed that PGs play pivotal roles in embryo development, ciliogenesis, and organ formation. Prostaglandin E2 (PGE2) and its receptor EP4 modulate ciliogenesis by increasing the anterograde intraflagellar transport. Many G-protein-coupled receptors (GPCRs) including EP4 are localized in cilia for modulating cAMP signaling under various conditions. During development, PGE2 signaling regulates embryogenesis, hepatocyte differentiation, hematopoiesis, and kidney formation. Prostaglandins are also essential for skeletal muscle repair. This review outlines recent advances in understanding the functions and mechanisms of prostaglandin signaling in ciliogenesis, embryo development, and organ formation.
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Affiliation(s)
- Daqing Jin
- Shanghai Key Laboratory of Regulatory Biology, Institute of Molecular Medicine, School of Life Sciences, East China Normal University, Shanghai, China
| | - Tao P Zhong
- Shanghai Key Laboratory of Regulatory Biology, Institute of Molecular Medicine, School of Life Sciences, East China Normal University, Shanghai, China
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5
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Leverrier-Penna S, Michel A, Lecante LL, Costet N, Suglia A, Desdoits-Lethimonier C, Boulay H, Viel R, Chemouny JM, Becker E, Lavoué V, Rolland AD, Dejucq-Rainsford N, Vigneau C, Mazaud-Guittot S. Exposure of human fetal kidneys to mild analgesics interferes with early nephrogenesis. FASEB J 2021; 35:e21718. [PMID: 34105801 DOI: 10.1096/fj.202100050r] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 05/14/2021] [Accepted: 05/19/2021] [Indexed: 11/11/2022]
Abstract
Acetaminophen, aspirin, and ibuprofen are mild analgesics commonly used by pregnant women, the sole current recommendation being to avoid ibuprofen from the fifth month of gestation. The nephrotoxicity of these three analgesics is well documented in adults, as is their interference with prostaglandins biosynthesis. Here we investigated the effect of these analgesics on human first trimester kidneys ex vivo. We first evaluated prostaglandins biosynthesis functionality by performing a wide screening of prostaglandin expression patterns in first trimester human kidneys. We demonstrated that prostaglandins biosynthesis machinery is functional during early nephrogenesis. Human fetal kidney explants aged 7-12 developmental weeks were exposed ex vivo to ibuprofen, aspirin or acetaminophen for 7 days, and analyzed by histology, immunohistochemistry, and flow cytometry. This study has revealed that these analgesics induced a spectrum of abnormalities within early developing structures, ranging from cell death to a decline in differentiating glomeruli density. These results warrant caution for the use of these medicines during the first trimester of pregnancy.
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Affiliation(s)
- Sabrina Leverrier-Penna
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, Rennes, France.,Univ Poitiers, STIM, CNRS ERL7003, Poitiers, France
| | - Alain Michel
- Univ Rennes, CHU Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, Rennes, France
| | - Laetitia L Lecante
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, Rennes, France
| | - Nathalie Costet
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, Rennes, France
| | - Antonio Suglia
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, Rennes, France
| | - Christèle Desdoits-Lethimonier
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, Rennes, France
| | - Hugoline Boulay
- Univ Rennes, CHU Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, Rennes, France
| | - Roselyne Viel
- University Rennes 1, CNRS, Inserm UMS Biosit, Core Facility H2P2, Rennes, France
| | - Jonathan M Chemouny
- Univ Rennes, CHU Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, Rennes, France
| | - Emmanuelle Becker
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, Rennes, France
| | - Vincent Lavoué
- CHU Rennes, Service Gynécologie et Obstétrique, Rennes, France
| | - Antoine D Rolland
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, Rennes, France
| | - Nathalie Dejucq-Rainsford
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, Rennes, France
| | - Cécile Vigneau
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, Rennes, France.,Univ Rennes, CHU Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, Rennes, France
| | - Séverine Mazaud-Guittot
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, Rennes, France
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6
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Shvedova M, Litvak MM, Roberts JD, Fukumura D, Suzuki T, Şencan İ, Li G, Reventun P, Buys ES, Kim HH, Sakadžić S, Ayata C, Huang PL, Feil R, Atochin DN. cGMP-dependent protein kinase I in vascular smooth muscle cells improves ischemic stroke outcome in mice. J Cereb Blood Flow Metab 2019; 39:2379-2391. [PMID: 31423931 PMCID: PMC6893979 DOI: 10.1177/0271678x19870583] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Accepted: 07/18/2019] [Indexed: 11/15/2022]
Abstract
Recent works highlight the therapeutic potential of targeting cyclic guanosine monophosphate (cGMP)-dependent pathways in the context of brain ischemia/reperfusion injury (IRI). Although cGMP-dependent protein kinase I (cGKI) has emerged as a key mediator of the protective effects of nitric oxide (NO) and cGMP, the mechanisms by which cGKI attenuates IRI remain poorly understood. We used a novel, conditional cGKI knockout mouse model to study its role in cerebral IRI. We assessed neurological deficit, infarct volume, and cerebral perfusion in tamoxifen-inducible vascular smooth muscle cell-specific cGKI knockout mice and control animals. Stroke experiments revealed greater cerebral infarct volume in smooth muscle cell specific cGKI knockout mice (males: 96 ± 16 mm3; females: 93 ± 12 mm3, mean±SD) than in all control groups: wild type (males: 66 ± 19; females: 64 ± 14), cGKI control (males: 65 ± 18; females: 62 ± 14), cGKI control with tamoxifen (males: 70 ± 8; females: 68 ± 10). Our results identify, for the first time, a protective role of cGKI in vascular smooth muscle cells during ischemic stroke injury. Moreover, this protective effect of cGKI was found to be independent of gender and was mediated via improved reperfusion. These results suggest that cGKI in vascular smooth muscle cells should be targeted by therapies designed to protect brain tissue against ischemic stroke.
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Affiliation(s)
- Maria Shvedova
- Cardiovascular Research Center, Division of Cardiology, Department of Medicine, Harvard Medical School, Massachusetts General Hospital, Charlestown, MA, USA
| | - Maxim M Litvak
- Tomsk Polytechnic University, RASA Center, Tomsk, Russian Federation
| | - Jesse D Roberts
- Cardiovascular Research Center, Division of Cardiology, Department of Medicine, Harvard Medical School, Massachusetts General Hospital, Charlestown, MA, USA
- Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Dai Fukumura
- Department of Radiation Oncology, Edwin L. Steele Laboratories, Massachusetts General Hospital, Boston, MA, USA
| | - Tomoaki Suzuki
- Department of Radiology, Neurovascular Research Laboratory, Harvard Medical School, Massachusetts General Hospital, Charlestown, MA, USA
| | - İkbal Şencan
- Athinoula A. Martinos Center for Biomedical Imaging, Harvard Medical School, Massachusetts General Hospital, Charlestown, MA, USA
| | - Ge Li
- Department of Radiology, Neurovascular Research Laboratory, Harvard Medical School, Massachusetts General Hospital, Charlestown, MA, USA
| | - Paula Reventun
- Department of Biology Systems, School of Medicine, University of Alcalá, Madrid, Spain
| | - Emmanuel S Buys
- Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Hyung-Hwan Kim
- Department of Radiology, Neurovascular Research Laboratory, Harvard Medical School, Massachusetts General Hospital, Charlestown, MA, USA
| | - Sava Sakadžić
- Athinoula A. Martinos Center for Biomedical Imaging, Harvard Medical School, Massachusetts General Hospital, Charlestown, MA, USA
| | - Cenk Ayata
- Department of Radiology, Neurovascular Research Laboratory, Harvard Medical School, Massachusetts General Hospital, Charlestown, MA, USA
| | - Paul L Huang
- Cardiovascular Research Center, Division of Cardiology, Department of Medicine, Harvard Medical School, Massachusetts General Hospital, Charlestown, MA, USA
| | - Robert Feil
- Interfaculty Institute of Biochemistry, University of Tübingen, Tübingen, Germany
| | - Dmitriy N Atochin
- Cardiovascular Research Center, Division of Cardiology, Department of Medicine, Harvard Medical School, Massachusetts General Hospital, Charlestown, MA, USA
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7
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Arachidonic Acid Metabolism and Kidney Inflammation. Int J Mol Sci 2019; 20:ijms20153683. [PMID: 31357612 PMCID: PMC6695795 DOI: 10.3390/ijms20153683] [Citation(s) in RCA: 178] [Impact Index Per Article: 35.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 07/19/2019] [Accepted: 07/20/2019] [Indexed: 12/17/2022] Open
Abstract
As a major component of cell membrane lipids, Arachidonic acid (AA), being a major component of the cell membrane lipid content, is mainly metabolized by three kinds of enzymes: cyclooxygenase (COX), lipoxygenase (LOX), and cytochrome P450 (CYP450) enzymes. Based on these three metabolic pathways, AA could be converted into various metabolites that trigger different inflammatory responses. In the kidney, prostaglandins (PG), thromboxane (Tx), leukotrienes (LTs) and hydroxyeicosatetraenoic acids (HETEs) are the major metabolites generated from AA. An increased level of prostaglandins (PGs), TxA2 and leukotriene B4 (LTB4) results in inflammatory damage to the kidney. Moreover, the LTB4-leukotriene B4 receptor 1 (BLT1) axis participates in the acute kidney injury via mediating the recruitment of renal neutrophils. In addition, AA can regulate renal ion transport through 19-hydroxystilbenetetraenoic acid (19-HETE) and 20-HETE, both of which are produced by cytochrome P450 monooxygenase. Epoxyeicosatrienoic acids (EETs) generated by the CYP450 enzyme also plays a paramount role in the kidney damage during the inflammation process. For example, 14 and 15-EET mitigated ischemia/reperfusion-caused renal tubular epithelial cell damage. Many drug candidates that target the AA metabolism pathways are being developed to treat kidney inflammation. These observations support an extraordinary interest in a wide range of studies on drug interventions aiming to control AA metabolism and kidney inflammation.
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Paquette K, Fernandes RO, Xie LF, Cloutier A, Fallaha C, Girard-Bock C, Mian MOR, Lukaszewski MA, Mâsse B, El-Jalbout R, Lapeyraque AL, Santos RA, Luu TM, Nuyt AM. Kidney Size, Renal Function, Ang (Angiotensin) Peptides, and Blood Pressure in Young Adults Born Preterm. Hypertension 2019; 72:918-928. [PMID: 30354721 DOI: 10.1161/hypertensionaha.118.11397] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Preterm birth incurs a higher risk for adult cardiovascular diseases, including hypertension. Because preterm birth may impact nephrogenesis, study objectives were to assess renal size and function of adults born preterm versus full term and to examine their relationship with blood pressure (BP; 24-hour ambulatory BP monitoring) and circulating renin-Ang (angiotensin) system peptides. The study included 92 young adults born (1987-1997) preterm (≤29 weeks of gestation) and term (n=92) matched for age, sex, and race. Young adults born preterm had smaller kidneys (80±17 versus 90±18 cm3/m2; P<0.001), higher urine albumin-to-creatinine ratio (0.70; interquartile range, 0.47-1.14 versus 0.58, interquartile range 0.42 to 0.78 mg/mmol, P=0.007), higher 24-hour systolic (121±9 versus 116±8 mm Hg; P=0.001) and diastolic (69±5 versus 66±6 mm Hg; P=0.004) BP, but similar estimated glomerular filtration rate. BP was inversely correlated with kidney size in preterm participants. Plasma Ang I was higher in preterm versus term participants (36.3; interquartile range, 13.2-62.3 versus 19.4; interquartile range, 9.9-28.1 pg/mL; P<0.001). There was no group difference in renin, Ang II, Ang (1-7), and alamandine. In the preterm, but not in the term group, higher BP was significantly associated with higher renin and alamandine and lower birth weight and gestational age with smaller adult kidney size. Young adults born preterm have smaller kidneys, higher urine albumin-to-creatinine ratio, higher BP, and higher circulating Ang I levels compared with term controls. Preterm young adults with smaller kidneys have higher BP. Clinical Trial Registration- URL: http://www.clinicaltrials.gov . Unique identifier: NCT03261609.
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Affiliation(s)
- Katryn Paquette
- From the Department of Pediatrics, Sainte-Justine University Hospital Research Center (K.P., R.O.F., L.F.X., A.C., C.F., C.G.-B., M.O.R.M., M.-A.L., A.-L.L., T.M.L., A.M.N.), University of Montreal, Quebec, Canada
| | - Rafael Oliveira Fernandes
- From the Department of Pediatrics, Sainte-Justine University Hospital Research Center (K.P., R.O.F., L.F.X., A.C., C.F., C.G.-B., M.O.R.M., M.-A.L., A.-L.L., T.M.L., A.M.N.), University of Montreal, Quebec, Canada
| | - Li Feng Xie
- From the Department of Pediatrics, Sainte-Justine University Hospital Research Center (K.P., R.O.F., L.F.X., A.C., C.F., C.G.-B., M.O.R.M., M.-A.L., A.-L.L., T.M.L., A.M.N.), University of Montreal, Quebec, Canada
| | - Anik Cloutier
- From the Department of Pediatrics, Sainte-Justine University Hospital Research Center (K.P., R.O.F., L.F.X., A.C., C.F., C.G.-B., M.O.R.M., M.-A.L., A.-L.L., T.M.L., A.M.N.), University of Montreal, Quebec, Canada
| | - Catherine Fallaha
- From the Department of Pediatrics, Sainte-Justine University Hospital Research Center (K.P., R.O.F., L.F.X., A.C., C.F., C.G.-B., M.O.R.M., M.-A.L., A.-L.L., T.M.L., A.M.N.), University of Montreal, Quebec, Canada
| | - Camille Girard-Bock
- From the Department of Pediatrics, Sainte-Justine University Hospital Research Center (K.P., R.O.F., L.F.X., A.C., C.F., C.G.-B., M.O.R.M., M.-A.L., A.-L.L., T.M.L., A.M.N.), University of Montreal, Quebec, Canada
| | - Muhammad Oneeb Rehman Mian
- From the Department of Pediatrics, Sainte-Justine University Hospital Research Center (K.P., R.O.F., L.F.X., A.C., C.F., C.G.-B., M.O.R.M., M.-A.L., A.-L.L., T.M.L., A.M.N.), University of Montreal, Quebec, Canada
| | - Marie-Amélie Lukaszewski
- From the Department of Pediatrics, Sainte-Justine University Hospital Research Center (K.P., R.O.F., L.F.X., A.C., C.F., C.G.-B., M.O.R.M., M.-A.L., A.-L.L., T.M.L., A.M.N.), University of Montreal, Quebec, Canada
| | - Benoit Mâsse
- Department of Social and Preventive Medicine, School of Public Health (B.M.), University of Montreal, Quebec, Canada
| | - Ramy El-Jalbout
- Department of Medical Imaging, Sainte-Justine University Hospital (R.E.-J.), University of Montreal, Quebec, Canada
| | - Anne-Laure Lapeyraque
- From the Department of Pediatrics, Sainte-Justine University Hospital Research Center (K.P., R.O.F., L.F.X., A.C., C.F., C.G.-B., M.O.R.M., M.-A.L., A.-L.L., T.M.L., A.M.N.), University of Montreal, Quebec, Canada
| | - Robson A Santos
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, Brazil (R.A.S.)
| | - Thuy Mai Luu
- From the Department of Pediatrics, Sainte-Justine University Hospital Research Center (K.P., R.O.F., L.F.X., A.C., C.F., C.G.-B., M.O.R.M., M.-A.L., A.-L.L., T.M.L., A.M.N.), University of Montreal, Quebec, Canada
| | - Anne Monique Nuyt
- From the Department of Pediatrics, Sainte-Justine University Hospital Research Center (K.P., R.O.F., L.F.X., A.C., C.F., C.G.-B., M.O.R.M., M.-A.L., A.-L.L., T.M.L., A.M.N.), University of Montreal, Quebec, Canada
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9
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Slattery P, Frölich S, Goren I, Nüsing RM. Salt supplementation ameliorates developmental kidney defects in COX-2 −/− mice. Am J Physiol Renal Physiol 2017; 312:F1044-F1055. [DOI: 10.1152/ajprenal.00565.2016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 02/15/2017] [Accepted: 02/27/2017] [Indexed: 11/22/2022] Open
Abstract
Deficiency of cyclooxygenase-2 (COX-2) activity in the early postnatal period causes impairment of kidney development leading to kidney insufficiency. We hypothesize that impaired NaCl reabsorption during the first days of life is a substantial cause for nephrogenic defects observed in COX-2−/− mice and that salt supplementation corrects these defects. Daily injections of NaCl (0.8 mg·g−1·day−1) for the first 10 days after birth ameliorated impaired kidney development in COX-2−/− pups resulting in an increase in glomerular size and fewer immature superficial glomeruli. However, impaired renal subcortical growth was not corrected. Increasing renal tubular flow by volume load or injections of KCl did not relieve the renal histomorphological damage. Administration of torsemide and spironolactone also affected nephrogenesis resulting in diminished glomeruli and cortical thinning. Treatment of COX-2−/− pups with NaCl/DOCA caused a stronger mitigation of glomerular size and induced a slight but significant growth of cortical tissue mass. After birth, renal mRNA expression of NHE3, NKCC2, ROMK, NCCT, ENaC, and Na+/K+-ATPase increased relative to postnatal day 2 in wild-type mice. However, in COX-2−/− mice, a significantly lower expression was observed for NCCT, whereas NaCl/DOCA treatment significantly increased NHE3 and ROMK expression. Long-term effects of postnatal NaCl/DOCA injections indicate improved kidney function with normalization of pathologically enhanced creatinine and urea plasma levels; also, albumin excretion was observed. In summary, we present evidence that salt supplementation during the COX-2-dependent time frame of nephrogenesis partly reverses renal morphological defects in COX-2−/− mice and improves kidney function.
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Affiliation(s)
- Patrick Slattery
- Institute of Clinical Pharmacology, Goethe-University, Frankfurt, Germany; and
| | - Stefanie Frölich
- Institute of Clinical Pharmacology, Goethe-University, Frankfurt, Germany; and
| | - Itamar Goren
- Institute of Pharmacology and Toxicology, Goethe-University, Frankfurt, Germany
| | - Rolf M. Nüsing
- Institute of Clinical Pharmacology, Goethe-University, Frankfurt, Germany; and
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10
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Nuyt AM, Lavoie JC, Mohamed I, Paquette K, Luu TM. Adult Consequences of Extremely Preterm Birth: Cardiovascular and Metabolic Diseases Risk Factors, Mechanisms, and Prevention Avenues. Clin Perinatol 2017; 44:315-332. [PMID: 28477663 DOI: 10.1016/j.clp.2017.01.010] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Extremely preterm babies are exposed to various sources of injury during critical stages of development. The extremely preterm infant faces premature transition to ex utero physiology and undergoes adaptive mechanisms that may be deleterious in the long term because of permanent alterations in organ structure and function. Perinatal events can also directly cause structural injury. These disturbances induce morphologic and functional changes in their organ systems that might heighten their risks for later adult chronic diseases. This review examines the pathophysiology of programming of long-term health and diseases after preterm birth and associated perinatal risk factors.
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Affiliation(s)
- Anne Monique Nuyt
- Division of Neonatology, Department of Pediatrics, Faculty of Medicine, Research Center, Centre Hospitalier Universitaire Sainte-Justine, Université de Montréal, 3175 chemin de la Côte-Sainte-Catherine, Montreal, Quebec H3T 1C5, Canada.
| | - Jean-Claude Lavoie
- Division of Neonatology, Department of Pediatrics, Faculty of Medicine, Research Center, Centre Hospitalier Universitaire Sainte-Justine, Université de Montréal, 3175 chemin de la Côte-Sainte-Catherine, Montreal, Quebec H3T 1C5, Canada; Department of Nutrition, Faculty of Medicine, Research Center, Centre Hospitalier Universitaire Sainte-Justine, Université de Montréal, 3175 chemin de la Côte-Sainte-Catherine, Montreal, Quebec H3T 1C5, Canada
| | - Ibrahim Mohamed
- Division of Neonatology, Department of Pediatrics, Faculty of Medicine, Research Center, Centre Hospitalier Universitaire Sainte-Justine, Université de Montréal, 3175 chemin de la Côte-Sainte-Catherine, Montreal, Quebec H3T 1C5, Canada
| | - Katryn Paquette
- Division of Neonatology, Department of Pediatrics, Faculty of Medicine, Research Center, Centre Hospitalier Universitaire Sainte-Justine, Université de Montréal, 3175 chemin de la Côte-Sainte-Catherine, Montreal, Quebec H3T 1C5, Canada
| | - Thuy Mai Luu
- Division of General Pediatrics, Department of Pediatrics, Faculty of Medicine, Research Center, Centre Hospitalier Universitaire Sainte-Justine, Université de Montréal, 3175 chemin de la Côte-Sainte-Catherine, Montreal, Quebec H3T 1C5, Canada
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11
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Hyperfiltration-associated biomechanical forces in glomerular injury and response: Potential role for eicosanoids. Prostaglandins Other Lipid Mediat 2017; 132:59-68. [PMID: 28108282 DOI: 10.1016/j.prostaglandins.2017.01.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 12/22/2016] [Accepted: 01/10/2017] [Indexed: 12/29/2022]
Abstract
Hyperfiltration is a well-known risk factor in progressive loss of renal function in chronic kidney disease (CKD) secondary to various diseases. A reduced number of functional nephrons due to congenital or acquired cause(s) results in hyperfiltration in the remnant kidney. Hyperfiltration-associated increase in biomechanical forces, namely pressure-induced tensile stress and fluid flow-induced shear stress (FFSS) determine cellular injury and response. We believe the current treatment of CKD yields limited success because it largely attenuates pressure-induced tensile stress changes but not the effect of FFSS on podocytes. Studies on glomerular podocytes, tubular epithelial cells and bone osteocytes provide evidence for a significant role of COX-2 generated PGE2 and its receptors in response to tensile stress and FFSS. Preliminary observations show increased urinary PGE2 in children born with a solitary kidney. FFSS-induced COX2-PGE2-EP2 signaling provides an opportunity to identify targets and, for developing novel agents to complement currently available treatment.
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12
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Angiotensin II-AT1-receptor signaling is necessary for cyclooxygenase-2-dependent postnatal nephron generation. Kidney Int 2016; 91:818-829. [PMID: 28040266 DOI: 10.1016/j.kint.2016.11.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 10/25/2016] [Accepted: 11/03/2016] [Indexed: 11/23/2022]
Abstract
Deletion of cyclooxygenase-2 (COX-2) causes impairment of postnatal kidney development. Here we tested whether the renin angiotensin system contributes to COX-2-dependent nephrogenesis in mice after birth and whether a rescue of impaired renal development and function in COX-2-/- mice was achievable. Plasma renin concentration in mouse pups showed a birth peak and a second peak around day P8 during the first 10 days post birth. Administration of the angiotensin II receptor AT1 antagonist telmisartan from day P1 to P3 did not result in cortical damage. However, telmisartan treatment from day P3 to P8, the critical time frame of renal COX-2 expression, led to hypoplastic glomeruli, a thinned subcapsular cortex and maturational arrest of superficial glomeruli quite similar to that observed in COX-2-/- mice. In contrast, AT2 receptor antagonist PD123319 was without any effect on renal development. Inhibition of the renin angiotensin system by aliskiren and enalapril caused similar glomerular defects as telmisartan. Administration of the AT1 receptor agonist L162313 to COX-2-/- pups improved kidney growth, ameliorated renal defects, but had no beneficial effect on reduced cortical mass. L162313 rescued impaired renal function by reducing serum urea and creatinine and mitigated pathologic albumin excretion. Moreover, glomerulosclerosis in the kidneys of COX-2-/- mice was reduced. Thus, angiotensin II-AT1-receptor signaling is necessary for COX-2-dependent normal postnatal nephrogenesis and maturation.
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13
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Indoxyl Sulfate Induces Mesangial Cell Proliferation via the Induction of COX-2. Mediators Inflamm 2016; 2016:5802973. [PMID: 27843201 PMCID: PMC5097817 DOI: 10.1155/2016/5802973] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 09/27/2016] [Indexed: 11/18/2022] Open
Abstract
Indoxyl sulfate (IS) is one of important uremic toxins and is markedly accumulated in the circulation of end stage renal disease (ESRD) patients, which might contribute to the damage of residual nephrons and progressive loss of residual renal function (RRF). Thus this study was undertaken to investigate the role of IS in modulating mesangial cell (MC) proliferation and the underlying mechanism. The proliferation of MCs induced by IS was determined by cell number counting, DNA synthase rate, and cell cycle phase analysis. COX-2 expression was examined by Western blotting and qRT-PCR, and a specific COX-2 inhibitor NS398 was applied to define its role in IS-induced MC proliferation. Following IS treatment, MCs exhibited increased total cell number, DNA synthesis rate, and number of cells in S and G2 phases paralleled with the upregulation of cyclin A2 and cyclin D1. Next, we found an inducible inflammation-related enzyme COX-2 was remarkably enhanced by IS, and the inhibition of COX-2 by NS398 significantly blocked IS-induced MC proliferation in line with a blockade of PGE2 production. These findings indicated that IS could induce MC proliferation via a COX-2-mediated mechanism, providing new insights into the understanding and therapies of progressive loss of RRF in ESRD.
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Yoshioka W, Kawaguchi T, Nishimura N, Akagi T, Fujisawa N, Yanagisawa H, Matsumura F, Tohyama C. Polyuria-associated hydronephrosis induced by xenobiotic chemical exposure in mice. Am J Physiol Renal Physiol 2016; 311:F752-F762. [DOI: 10.1152/ajprenal.00001.2016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 07/16/2016] [Indexed: 12/19/2022] Open
Abstract
Hydronephrosis is a commonly found disease state characterized by the dilation of renal calices and pelvis, resulting in the loss of kidney function in the severest cases. A generally accepted etiology of hydronephrosis involves the obstruction of urine flow along the urinary tract. In the recent years, we have developed a mouse model of hydronephrosis induced by lactational exposure to dioxin and demonstrated a lack of anatomical obstruction in this model. We also showed that prostaglandin E2 synthesis system plays a critical role in the onset of hydronephrosis. In the present study, we found that neonatal hydronephrosis was not likely to be associated with functional obstruction (impaired peristalsis) but was found to be associated with polyuria and low urine osmolality with the downregulation of proteins involved in the urine concentrating process. The administration of an antidiuretic hormone analog to the dioxin-exposed pups not only suppressed the increased urine output but also decreased the incidence and severity of hydronephrosis. In contrast to the case in pups, administration of dioxin to adult mice failed to induce polyuria and upregulation of prostaglandin E2 synthesis system, and the adult mice were resistant to develop hydronephrosis. These findings suggest the possibility that polyuria could induce hydronephrosis in the absence of anatomical or functional obstruction of the ureter. It is concluded that the present animal model provides a unique example of polyuria-associated type of hydronephrosis, suggesting a need to redefine this disease state.
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Affiliation(s)
- Wataru Yoshioka
- Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
- Department of Public Health and Environmental Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Tatsuya Kawaguchi
- Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Noriko Nishimura
- Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Toshiya Akagi
- Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Nozomi Fujisawa
- Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Hiroyuki Yanagisawa
- Department of Public Health and Environmental Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Fumio Matsumura
- Department of Environmental Toxicology and Center for Environmental Health Sciences, University of California, Davis, California; and
| | - Chiharu Tohyama
- Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
- Environmental Biology Laboratory, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
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15
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Slattery P, Frölich S, Schreiber Y, Nüsing RM. COX-2 gene dosage-dependent defects in kidney development. Am J Physiol Renal Physiol 2016; 310:F1113-22. [PMID: 26984955 DOI: 10.1152/ajprenal.00430.2015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Accepted: 03/10/2016] [Indexed: 12/18/2022] Open
Abstract
Deletion of cyclooxygenase (COX)-2 causes impairment of kidney development, including hypothrophic glomeruli and cortical thinning. A critical role for COX-2 is seen 4-8 days postnatally. The present study was aimed at answering whether different COX-2 gene dosage and partial pharmacological COX-2 inhibition impairs kidney development. We studied kidney development in COX-2(+/+), COX-2(+/-), and COX-2(-/-) mice as well as in C57Bl6 mice treated postnatally with low (5 mg·kg(-1)·day(-1)) and high (10 mg·kg(-1)·day(-1)) doses of the selective COX-2 inhibitor SC-236. COX-2(+/-) mice exhibit impaired kidney development leading to reduced glomerular size but, in contrast to COX-2(-/-) mice, only marginal cortical thinning. Moreover, in COX-2(+/-) and COX-2(-/-) kidneys, juxtamedullary glomeruli, which develop in the very early stages of nephrogenesis, also showed a size reduction. In COX-2(+/-) kidneys at the age of 8 days, we observed significantly less expression of COX-2 mRNA and protein and less PGE2 and PGI2 synthetic activity compared with COX-2(+/+) kidneys. The renal defects in COX-2(-/-) and COX-2(+/-) kidneys could be mimicked by high and low doses of SC-236, respectively. In aged COX-2(+/-) kidneys, glomerulosclerosis was observed; however, in contrast to COX-2(-/-) kidneys, periglomerular fibrosis was absent. COX-2(+/-) mice showed signs of kidney insufficiency, demonstrated by enhanced serum creatinine levels, quite similar to COX-2(-/-) mice, but, in contrast, serum urea remained at the control level. In summary, function of both COX-2 gene alleles is absolutely necessary to ensure physiological development of the mouse kidney. Loss of one copy of the COX-2 gene or partial COX-2 inhibition is associated with distinct renal damage and reduced kidney function.
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Affiliation(s)
- Patrick Slattery
- Institute of Clinical Pharmacology, Goethe-University, Frankfurt, Germany; and
| | - Stefanie Frölich
- Institute of Clinical Pharmacology, Goethe-University, Frankfurt, Germany; and
| | | | - Rolf M Nüsing
- Institute of Clinical Pharmacology, Goethe-University, Frankfurt, Germany; and
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16
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Prostaglandin E2 increases proximal tubule fluid reabsorption, and modulates cultured proximal tubule cell responses via EP1 and EP4 receptors. J Transl Med 2015; 95:1044-55. [PMID: 26121313 DOI: 10.1038/labinvest.2015.79] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Revised: 04/14/2015] [Accepted: 05/13/2015] [Indexed: 12/19/2022] Open
Abstract
Renal prostaglandin (PG) E2 regulates salt and water transport, and affects disease processes via EP1-4 receptors, but its role in the proximal tubule (PT) is unknown. Our study investigates the effects of PGE2 on mouse PT fluid reabsorption, and its role in growth, sodium transporter expression, fibrosis, and oxidative stress in a mouse PT cell line (MCT). To determine which PGE2 EP receptors are expressed in MCT, qPCR for EP1-4 was performed on cells stimulated for 24 h with PGE2 or transforming growth factor beta (TGFβ), a known mediator of PT injury in kidney disease. EP1 and EP4 were detected in MCT, but EP2 and EP3 are not expressed. EP1 was increased by PGE2 and TGFβ, but EP4 was unchanged. To confirm the involvement of EP1 and EP4, sulprostone (SLP, EP1/3 agonist), ONO8711 (EP1 antagonist), and EP1 and EP4 siRNA were used. We first show that PGE2, SLP, and TGFβ reduced H(3)-thymidine and H(3)-leucine incorporation. The effects on cell-cycle regulators were examined by western blot. PGE2 increased p27 via EP1 and EP4, but TGFβ increased p21; PGE2-induced p27 was attenuated by TGFβ. PGE2 and SLP reduced cyclinE, while TGFβ increased cyclinD1, an effect attenuated by PGE2 administration. Na-K-ATPase α1 (NaK) was increased by PGE2 via EP1 and EP4. TGFβ had no effect on NaK. Additionally, PGE2 and TGFβ increased fibronectin levels, reaching 12-fold upon co-stimulation. EP1 siRNA abrogated PGE2-fibronectin. PGE2 also increased ROS generation, and ONO-8711 blocked PGE2-ROS. Finally, PGE2 significantly increased fluid reabsorption by 31 and 46% in isolated perfused mouse PT from C57BL/6 and FVB mice, respectively, and this was attenuated in FVB-EP1 null mice. Altogether PGE2 acting on EP1 and EP4 receptors may prove to be important mediators of PT injury, and salt and water transport.
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17
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Mederle K, Meurer M, Castrop H, Höcherl K. Inhibition of COX-1 attenuates the formation of thromboxane A2 and ameliorates the acute decrease in glomerular filtration rate in endotoxemic mice. Am J Physiol Renal Physiol 2015; 309:F332-40. [DOI: 10.1152/ajprenal.00567.2014] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Accepted: 05/11/2015] [Indexed: 11/22/2022] Open
Abstract
Thromboxane (Tx) A2 has been suggested to be involved in the development of sepsis-induced acute kidney injury (AKI). Therefore, we investigated the impact of cyclooxygenase (COX)-1 and COX-2 activity on lipopolysaccharide (LPS)-induced renal TxA2 formation, and on endotoxemia-induced AKI in mice. Injection of LPS (3 mg/kg ip) decreased glomerular filtration rate (GFR) and the amount of thrombocytes to ∼50% of basal values after 4 h. Plasma and renocortical tissue levels of TxB2 were increased ∼10- and 1.7-fold in response to LPS, respectively. The COX-1 inhibitor SC-560 attenuated the LPS-induced fall in GFR and in platelet count to ∼75% of basal levels. Furthermore, SC-560 abolished the increase in plasma and renocortical tissue levels of TxB2 in response to LPS. The COX-2 inhibitor SC-236 further enhanced the LPS-induced decrease in GFR to ∼40% of basal values. SC-236 did not alter thrombocyte levels nor the LPS-induced increase in plasma and renocortical tissue levels of TxB2. Pretreatment with clopidogrel inhibited the LPS-induced drop in thrombocyte count, but did not attenuate the LPS-induced decrease in GFR and the increase in plasma TxB2 levels. This study demonstrates that endotoxemia-induced TxA2 formation depends on the activity of COX-1. Our study further indicates that the COX-1 inhibitor SC-560 has a protective effect on the decrease in renal function in response to endotoxin. Therefore, our data support a role for TxA2 in the development of AKI in response to LPS.
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Affiliation(s)
- Katharina Mederle
- Institute of Physiology, University of Regensburg, Regensburg, Germany; and
| | - Manuel Meurer
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Hayo Castrop
- Institute of Physiology, University of Regensburg, Regensburg, Germany; and
| | - Klaus Höcherl
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
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18
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Role of the prostaglandin E2/E-prostanoid 2 receptor signalling pathway in TGFβ-induced mice mesangial cell damage. Biosci Rep 2014; 34:e00159. [PMID: 25327961 PMCID: PMC4266927 DOI: 10.1042/bsr20140130] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The prostaglandin E2 receptor, EP2 (E-prostanoid 2), plays an important role in mice glomerular MCs (mesangial cells) damage induced by TGFβ1 (transforming growth factor-β1); however, the molecular mechanisms for this remain unknown. The present study examined the role of the EP2 signalling pathway in TGFβ1-induced MCs proliferation, ECM (extracellular matrix) accumulation and expression of PGES (prostaglandin E2 synthase). We generated primary mice MCs. Results showed MCs proliferation promoted by TGFβ1 were increased; however, the production of cAMP and PGE2 (prostaglandin E2) was decreased. EP2 deficiency in these MCs augmented FN (fibronectin), Col I (collagen type I), COX2 (cyclooxygenase-2), mPGES-1 (membrane-associated prostaglandin E1), CTGF (connective tissue growth factor) and CyclinD1 expression stimulated by TGFβ1. Silencing of EP2 also strengthened TGFβ1-induced p38MAPK (mitogen-activated protein kinase), ERK1/2 (extracellular-signal-regulated kinase 1/2) and CREB1 (cAMP responsive element-binding protein 1) phosphorylation. In contrast, Adenovirus-mediated EP2 overexpression reversed the effects of EP2-siRNA (small interfering RNA). Collectively, the investigation indicates that EP2 may block p38MAPK, ERK1/2 and CREB1 phosphorylation via activation of cAMP production and stimulation of PGE2 through EP2 receptors which prevent TGFβ1-induced MCs damage. Our findings also suggest that pharmacological targeting of EP2 receptors may provide new inroads to antagonize the damage induced by TGFβ1.
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19
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Nasrallah R, Hassouneh R, Hébert RL. Chronic kidney disease: targeting prostaglandin E2 receptors. Am J Physiol Renal Physiol 2014; 307:F243-50. [PMID: 24966087 DOI: 10.1152/ajprenal.00224.2014] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Chronic kidney disease is a leading cause of morbidity and mortality in the world. A better understanding of disease mechanisms has been gained in recent years, but the current management strategies are ineffective at preventing disease progression. A widespread focus of research is placed on elucidating the specific processes implicated to find more effective therapeutic options. PGE2, acting on its four EP receptors, regulates many renal disease processes; thus EP receptors could prove to be important targets for kidney disease intervention strategies. This review summarizes the major pathogenic mechanisms contributing to initiation and progression of chronic kidney disease, emphasizing the role of hyperglycemia, hypertension, inflammation, and oxidative stress. We have long recognized the multifaceted role of PGs in both the initiation and progression of chronic kidney disease, yet studies are only now seriously contemplating specific EP receptors as targets for therapy. Given the plethora of renal complications attributed to PG involvement in the kidney, this review highlights these pathogenic events and emphasizes the PGE2 receptor targets as options available to complement current therapeutic strategies.
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Affiliation(s)
- Rania Nasrallah
- Department of Cellular and Molecular Medicine, and Kidney Research Centre, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Ramzi Hassouneh
- Department of Cellular and Molecular Medicine, and Kidney Research Centre, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Richard L Hébert
- Department of Cellular and Molecular Medicine, and Kidney Research Centre, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
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20
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Bueters RR, Klaasen A, van den Heuvel LP, Schreuder MF. Effect of NSAIDs and diuretics on nephrogenesis in an ex vivo embryogenic kidney model. ACTA ACUST UNITED AC 2014; 98:486-92. [PMID: 24408660 DOI: 10.1002/bdrb.21090] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Accepted: 12/04/2013] [Indexed: 11/06/2022]
Abstract
The kidney is one of the key organs in clearing foreign compounds. The effects of drugs on the developing kidney are relatively unknown. We studied the direct effect of furosemide, hydrochlorothiazide, ibuprofen, and indomethacin on kidney development in an ex vivo embryonic kidney model. At embryonic day 13, metanephroi were dissected from mice and cultured in control media or media supplemented with various clinically relevant concentrations of drugs. The ureteric tree was visualized by whole-mount staining and branching was evaluated by counting. Additionally, gene expression levels of Wt1, Sox9, Bmp7, Fgf8, and Gdnf were investigated. No distinct differences were noted on either ureteric tip development or gene expression analysis for each drug after 24 hr of exposure. Even though short-term exposure to clinically relevant concentrations seems not to disturb renal development, future research is needed to study prolonged or repeated exposures.
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Affiliation(s)
- Ruud Rg Bueters
- Department of Pediatric Nephrology, Radboud University Medical Center, Nijmegen, The Netherlands
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21
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Brose SA, Golovko MY. Eicosanoid post-mortem induction in kidney tissue is prevented by microwave irradiation. Prostaglandins Leukot Essent Fatty Acids 2013; 89:313-8. [PMID: 24113545 PMCID: PMC3825172 DOI: 10.1016/j.plefa.2013.09.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Revised: 09/07/2013] [Accepted: 09/07/2013] [Indexed: 10/26/2022]
Abstract
Previously, we, and others, have demonstrated a rapid and significant post-mortem increase in brain prostanoid (PG) levels analyzed without microwave fixation, and this is not the result of PG trapping or destruction in microwave-irradiated brain tissue. In the present study, we demonstrate a dramatic increase in kidney eicosanoid levels when analyzed without microwave fixation which was mainly accounted for by the 142-, 81-, and 62-fold increase in medullary 6-ketoPGF1α, PGE2, and PGF2α, levels, respectively, while PGD2 and TXB2 levels were increased ~7-fold. Whole kidney and cortex PG were also significantly increased in non-microwaved tissue, but at lesser extent. Arachidonic acid and the lipoxygenase products hydroxyeicosatetraenoic acids (HETE) were also induced in whole kidney, cortex, and medulla 1.5- to 5.5-fold depending upon tissue and metabolite. Cyclooxygenase inhibition with indomethacin decreased PG mass in non-microwaved tissue to basal levels, however HETE and arachidonic acid were not decreased. These data demonstrate the critical importance of kidney tissue fixation to limiting artifacts during kidney eicosanoid analysis.
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Affiliation(s)
| | - Mikhail Y. Golovko
- Corresponding author: Department of Pharmacology, Physiology, and Therapeutics School of Medicine and Health Sciences University of North Dakota 501 N. Columbia Rd. Grand Forks, ND 58202-9037 701-777-2305 phone 701-777-4490 fax
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22
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Konya V, Marsche G, Schuligoi R, Heinemann A. E-type prostanoid receptor 4 (EP4) in disease and therapy. Pharmacol Ther 2013; 138:485-502. [PMID: 23523686 PMCID: PMC3661976 DOI: 10.1016/j.pharmthera.2013.03.006] [Citation(s) in RCA: 118] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Accepted: 03/07/2013] [Indexed: 01/06/2023]
Abstract
The large variety of biological functions governed by prostaglandin (PG) E2 is mediated by signaling through four distinct E-type prostanoid (EP) receptors. The availability of mouse strains with genetic ablation of each EP receptor subtype and the development of selective EP agonists and antagonists have tremendously advanced our understanding of PGE2 as a physiologically and clinically relevant mediator. Moreover, studies using disease models revealed numerous conditions in which distinct EP receptors might be exploited therapeutically. In this context, the EP4 receptor is currently emerging as most versatile and promising among PGE2 receptors. Anti-inflammatory, anti-thrombotic and vasoprotective effects have been proposed for the EP4 receptor, along with its recently described unfavorable tumor-promoting and pro-angiogenic roles. A possible explanation for the diverse biological functions of EP4 might be the multiple signaling pathways switched on upon EP4 activation. The present review attempts to summarize the EP4 receptor-triggered signaling modules and the possible therapeutic applications of EP4-selective agonists and antagonists.
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Key Words
- ampk, amp-activated protein kinase
- camp, cyclic adenylyl monophosphate
- cftr, cystic fibrosis transmembrane conductance regulator
- clc, chloride channel
- cox, cyclooxygenase
- creb, camp-response element-binding protein
- dp, d-type prostanoid receptor
- dss, dextran sodium sulfate
- egfr, epidermal growth factor receptor
- enos, endothelial nitric oxide synthase
- ep, e-type prostanoid receptor
- epac, exchange protein activated by camp
- eprap, ep4 receptor-associated protein
- erk, extracellular signal-regulated kinase
- fem1a, feminization 1 homolog a
- fp, f-type prostanoid receptor
- grk, g protein-coupled receptor kinase
- 5-hete, 5-hydroxyeicosatetraenoic acid
- icer, inducible camp early repressor
- icam-1, intercellular adhesion molecule-1
- ig, immunoglobulin
- il, interleukin
- ifn, interferon
- ip, i-type prostanoid receptor
- lps, lipopolysaccharide
- map, mitogen-activated protein kinase
- mcp, monocyte chemoattractant protein
- mek, map kinase kinase
- nf-κb, nuclear factor kappa-light-chain-enhancer of activated b cells
- nsaid, non-steroidal anti-inflammatory drug
- pg, prostaglandin
- pi3k, phosphatidyl insositol 3-kinase
- pk, protein kinase
- tp, t-type prostanoid receptor
- tx, thromboxane receptor
- prostaglandins
- inflammation
- vascular disease
- cancerogenesis
- renal function
- osteoporosis
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Affiliation(s)
| | | | | | - Akos Heinemann
- Institute of Experimental and Clinical Pharmacology, Medical University of Graz, Austria
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