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Czogalla J, Schliffke S, Lu S, Schwerk M, Petereit H, Zhang T, Liu S, Dumoulin B, Gies S, Wu G, Hänzelmann S, Bode M, Grahammer F, Gödel M, Voigtländer M, Butt L, Bokemeyer C, Bergmann C, Benzing T, Wiech T, Puelles VG, Huber TB. Ibrutinib-associated focal segmental glomerulosclerosis and the impact of podocin mutations in chronic lymphocytic leukemia. Kidney Int 2024; 105:877-881. [PMID: 38336226 DOI: 10.1016/j.kint.2024.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 01/28/2024] [Accepted: 02/02/2024] [Indexed: 02/12/2024]
Affiliation(s)
- Jan Czogalla
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany; Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany.
| | - Simon Schliffke
- II. Department of Medicine, University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany
| | - Shun Lu
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany; Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany
| | - Maria Schwerk
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany; Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany
| | - Helena Petereit
- Department II of Internal Medicine, University of Cologne, Faculty of Medicine and University Hospital Cologne, Cologne, Germany; Center for Molecular Medicine Cologne (CMMC), University of Cologne, Faculty of Medicine and University Hospital Cologne, Cologne, Germany; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Faculty of Medicine and University Hospital Cologne, Cologne, Germany
| | - Tianran Zhang
- Institute of Medical Systems Biology, Center for Molecular Neurobiology Hamburg (ZMNH), University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany
| | - Shuya Liu
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany; Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany
| | - Bernhard Dumoulin
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany; Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany
| | - Sydney Gies
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany; Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany
| | - Guochao Wu
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany; Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany
| | - Sonja Hänzelmann
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany; Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany; Institute of Medical Systems Biology, Center for Molecular Neurobiology Hamburg (ZMNH), University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany; Center for Biomedical AI, University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany
| | - Marlies Bode
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany; Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany
| | - Florian Grahammer
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany; Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany
| | - Markus Gödel
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany; Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany
| | - Minna Voigtländer
- II. Department of Medicine, University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany
| | - Linus Butt
- Department II of Internal Medicine, University of Cologne, Faculty of Medicine and University Hospital Cologne, Cologne, Germany; Center for Molecular Medicine Cologne (CMMC), University of Cologne, Faculty of Medicine and University Hospital Cologne, Cologne, Germany; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Faculty of Medicine and University Hospital Cologne, Cologne, Germany
| | - Carsten Bokemeyer
- II. Department of Medicine, University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany
| | | | - Thomas Benzing
- Department II of Internal Medicine, University of Cologne, Faculty of Medicine and University Hospital Cologne, Cologne, Germany; Center for Molecular Medicine Cologne (CMMC), University of Cologne, Faculty of Medicine and University Hospital Cologne, Cologne, Germany; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Faculty of Medicine and University Hospital Cologne, Cologne, Germany
| | - Thorsten Wiech
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany; Institute of Pathology, Section for Renal Pathology, University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany
| | - Victor G Puelles
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany; Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany; Department of Clinical Medicine, Division of Pathology, Aarhus University, Aarhus, Denmark
| | - Tobias B Huber
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany; Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf | UKE, Hamburg, Hamburg, Germany
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Lin H, Du Z, Bouari S, Rijkse E, Cristoferi I, Obser A, Czogalla J, Danser AJ, Minnee RC, Hoogduijn MJ. Human Transplant Kidneys on Normothermic Machine Perfusion Display Endocrine Activity. Transplant Direct 2023; 9:e1503. [PMID: 37313312 PMCID: PMC10259641 DOI: 10.1097/txd.0000000000001503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 05/02/2023] [Indexed: 06/15/2023] Open
Abstract
Normothermic machine perfusion (NMP) is an alternative to hypothermic machine perfusion (HMP) for donor kidney preservation before transplantation. Contrary to HMP, NMP allows for functional assessment of donor kidneys because normothermic conditions allow for metabolic activity. The kidneys are key producers of hormones. Yet, it remains unknown whether donor kidneys during NMP display endocrine functions. Methods Fifteen donor kidneys were subjected to HMP followed by 2 h of NMP before transplantation. NMP perfusate was collected at 3 time points (0, 1, 2 h) for the measurements of prorenin/renin, erythropoietin (EPO), and vitamin D, and urine samples were collected at 1 h and 2 h for urodilatin measurement. Fifteen HMP perfusate samples were collected for the same measurements. Results Kidneys on NMP secreted significantly more prorenin, renin, EPO, and active vitamin D than during HMP. EPO and vitamin D secretion remained stable during 2 h of NMP, whereas the prorenin release rate increased and renin release rate decreased after 1 h. Donation after brain death kidneys secreted more vitamin D and less EPO during NMP than donation after circulatory death kidneys. Twelve donor kidneys produced urine during NMP and released detectable levels of urodilatin. Kidneys exhibited a large variation in hormone release rates. No significant differences were found in hormone release capacity between delayed graft function (DGF) and non-DGF kidneys, and no significant correlations were found between hormone release rates and the duration of DGF or 1-mo posttransplant serum creatinine levels. Conclusions Human transplant kidneys display endocrine activity during NMP. To explore whether correlations exist between hormone release rates and posttransplant kidney function, large numbers of kidneys are required.
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Affiliation(s)
- Hui Lin
- Division of Vascular Medicine and Pharmacology, Department of Internal Medicine, University Medical Center, Rotterdam, The Netherlands
| | - Zhaoyu Du
- Department of Internal Medicine, Erasmus MC Transplant Institute, University Medical Center Rotterdam, The Netherlands
| | - Sarah Bouari
- Division of HPB and Transplant Surgery, Department of Surgery, Erasmus MC Transplant Institute, University Medical Center Rotterdam, The Netherlands
| | - Elsaline Rijkse
- Division of HPB and Transplant Surgery, Department of Surgery, Erasmus MC Transplant Institute, University Medical Center Rotterdam, The Netherlands
| | - Iacopo Cristoferi
- Division of HPB and Transplant Surgery, Department of Surgery, Erasmus MC Transplant Institute, University Medical Center Rotterdam, The Netherlands
| | - Anja Obser
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jan Czogalla
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - A.H. Jan Danser
- Division of Vascular Medicine and Pharmacology, Department of Internal Medicine, University Medical Center, Rotterdam, The Netherlands
| | - Robert C. Minnee
- Division of HPB and Transplant Surgery, Department of Surgery, Erasmus MC Transplant Institute, University Medical Center Rotterdam, The Netherlands
| | - Martin J. Hoogduijn
- Department of Internal Medicine, Erasmus MC Transplant Institute, University Medical Center Rotterdam, The Netherlands
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Kylies D, Zimmermann M, Haas F, Schwerk M, Kuehl M, Brehler M, Czogalla J, Hernandez LC, Konczalla L, Okabayashi Y, Menzel J, Edenhofer I, Mezher S, Aypek H, Dumoulin B, Wu H, Hofmann S, Kretz O, Wanner N, Tomas NM, Krasemann S, Glatzel M, Kuppe C, Kramann R, Banjanin B, Schneider RK, Urbschat C, Arck P, Gagliani N, van Zandvoort M, Wiech T, Grahammer F, Sáez PJ, Wong MN, Bonn S, Huber TB, Puelles VG. Expansion-enhanced super-resolution radial fluctuations enable nanoscale molecular profiling of pathology specimens. Nat Nanotechnol 2023; 18:336-342. [PMID: 37037895 PMCID: PMC10115634 DOI: 10.1038/s41565-023-01328-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 01/13/2023] [Indexed: 06/19/2023]
Abstract
Expansion microscopy physically enlarges biological specimens to achieve nanoscale resolution using diffraction-limited microscopy systems1. However, optimal performance is usually reached using laser-based systems (for example, confocal microscopy), restricting its broad applicability in clinical pathology, as most centres have access only to light-emitting diode (LED)-based widefield systems. As a possible alternative, a computational method for image resolution enhancement, namely, super-resolution radial fluctuations (SRRF)2,3, has recently been developed. However, this method has not been explored in pathology specimens to date, because on its own, it does not achieve sufficient resolution for routine clinical use. Here, we report expansion-enhanced super-resolution radial fluctuations (ExSRRF), a simple, robust, scalable and accessible workflow that provides a resolution of up to 25 nm using LED-based widefield microscopy. ExSRRF enables molecular profiling of subcellular structures from archival formalin-fixed paraffin-embedded tissues in complex clinical and experimental specimens, including ischaemic, degenerative, neoplastic, genetic and immune-mediated disorders. Furthermore, as examples of its potential application to experimental and clinical pathology, we show that ExSRRF can be used to identify and quantify classical features of endoplasmic reticulum stress in the murine ischaemic kidney and diagnostic ultrastructural features in human kidney biopsies.
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Affiliation(s)
- Dominik Kylies
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Research Center On Rare Kidney Diseases (RECORD), University Hospital Erlangen, Erlangen, Germany
| | - Marina Zimmermann
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Institute of Medical Systems Biology, Center for Biomedical AI (bAIome), Center for Molecular Neurobiology Hamburg (ZMNH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Fabian Haas
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Maria Schwerk
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Malte Kuehl
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Institute of Medical Systems Biology, Center for Biomedical AI (bAIome), Center for Molecular Neurobiology Hamburg (ZMNH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Michael Brehler
- Institute of Medical Systems Biology, Center for Biomedical AI (bAIome), Center for Molecular Neurobiology Hamburg (ZMNH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jan Czogalla
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Lola C Hernandez
- Cell Communication and Migration Laboratory, Department of Biochemistry and Molecular Cell Biology (IBMZ), Center for Experimental Medicine, Hamburg, Germany
| | - Leonie Konczalla
- Department of General, Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Mildred Scheel Cancer Career Center HaTriCS4, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Yusuke Okabayashi
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Division of Nephrology and Hypertension, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | | | - Ilka Edenhofer
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Sam Mezher
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Hande Aypek
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Bernhard Dumoulin
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Hui Wu
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Smilla Hofmann
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Oliver Kretz
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Nicola Wanner
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Nicola M Tomas
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Susanne Krasemann
- Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Markus Glatzel
- Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Christoph Kuppe
- Institute of Experimental Medicine and Systems Biology and Division of Nephrology and Clinical Immunology, RWTH Aachen University Medical Faculty, Aachen, Germany
| | - Rafael Kramann
- Institute of Experimental Medicine and Systems Biology and Division of Nephrology and Clinical Immunology, RWTH Aachen University Medical Faculty, Aachen, Germany
| | - Bella Banjanin
- Department of Developmental Biology, Erasmus Medical Center, Rotterdam, The Netherlands
- Oncode Institute, Erasmus Medical Center Cancer Institute, Rotterdam, The Netherlands
| | - Rebekka K Schneider
- Department of Developmental Biology, Erasmus Medical Center, Rotterdam, The Netherlands
- Oncode Institute, Erasmus Medical Center Cancer Institute, Rotterdam, The Netherlands
- Institute for Cell and Tumor Biology, RWTH Aachen University, Aachen, Germany
| | - Christopher Urbschat
- Department of Obstetrics and Fetal Medicine, Division of Experimental Feto-Maternal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Petra Arck
- Department of Obstetrics and Fetal Medicine, Division of Experimental Feto-Maternal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Nicola Gagliani
- Department of General, Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Marc van Zandvoort
- Department of Genetics and Cell Biology, Maastricht University, School for Oncology and Reproduction GROW, School for Mental Health and Neuroscience MHeNS, and School for Cardiovascular Diseases CARIM, Maastricht University, Maastricht, The Netherlands
- Institute for Molecular Cardiovascular Research (IMCAR), RWTH Aachen University, Aachen, Germany
| | - Thorsten Wiech
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Florian Grahammer
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Pablo J Sáez
- Cell Communication and Migration Laboratory, Department of Biochemistry and Molecular Cell Biology (IBMZ), Center for Experimental Medicine, Hamburg, Germany
| | - Milagros N Wong
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
- Department of Pathology, Aarhus University Hospital, Aarhus, Denmark
| | - Stefan Bonn
- Institute of Medical Systems Biology, Center for Biomedical AI (bAIome), Center for Molecular Neurobiology Hamburg (ZMNH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Tobias B Huber
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Victor G Puelles
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark.
- Department of Pathology, Aarhus University Hospital, Aarhus, Denmark.
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Liu S, Zhao Y, Lu S, Zhang T, Lindenmeyer MT, Nair V, Gies SE, Wu G, Nelson RG, Czogalla J, Aypek H, Zielinski S, Liao Z, Schaper M, Fermin D, Cohen CD, Delic D, Krebs CF, Grahammer F, Wiech T, Kretzler M, Meyer-Schwesinger C, Bonn S, Huber TB. Single-cell transcriptomics reveals a mechanosensitive injury signaling pathway in early diabetic nephropathy. Genome Med 2023; 15:2. [PMID: 36627643 PMCID: PMC9830686 DOI: 10.1186/s13073-022-01145-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 11/24/2022] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Diabetic nephropathy (DN) is the leading cause of end-stage renal disease, and histopathologic glomerular lesions are among the earliest structural alterations of DN. However, the signaling pathways that initiate these glomerular alterations are incompletely understood. METHODS To delineate the cellular and molecular basis for DN initiation, we performed single-cell and bulk RNA sequencing of renal cells from type 2 diabetes mice (BTBR ob/ob) at the early stage of DN. RESULTS Analysis of differentially expressed genes revealed glucose-independent responses in glomerular cell types. The gene regulatory network upstream of glomerular cell programs suggested the activation of mechanosensitive transcriptional pathway MRTF-SRF predominantly taking place in mesangial cells. Importantly, activation of MRTF-SRF transcriptional pathway was also identified in DN glomeruli in independent patient cohort datasets. Furthermore, ex vivo kidney perfusion suggested that the regulation of MRTF-SRF is a common mechanism in response to glomerular hyperfiltration. CONCLUSIONS Overall, our study presents a comprehensive single-cell transcriptomic landscape of early DN, highlighting mechanosensitive signaling pathways as novel targets of diabetic glomerulopathy.
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Affiliation(s)
- Shuya Liu
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany.
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
| | - Yu Zhao
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Institute of Medical Systems Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Translational Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Shun Lu
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Tianran Zhang
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Institute of Medical Systems Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Maja T Lindenmeyer
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Viji Nair
- Department of Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, MI, USA
| | - Sydney E Gies
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Guochao Wu
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Robert G Nelson
- Chronic Kidney Disease Section, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Phoenix, AZ, USA
| | - Jan Czogalla
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Hande Aypek
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Stephanie Zielinski
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Institute of Cellular and Integrative Physiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Zhouning Liao
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Melanie Schaper
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Damian Fermin
- Department of Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, MI, USA
| | - Clemens D Cohen
- Nephrological Center, Medical Clinic and Policlinic IV, University of Munich, Munich, Germany
| | - Denis Delic
- Boehringer Ingelheim Pharma GmbH & Co. KG, Translational Medicine & Clinical Pharmacology, Birkendorferstr. 65, 88397, Biberach, Germany
- Fifth Department of Medicine (Nephrology/Endocrinology/Rheumatology), University Medical Centre Mannheim, University of Heidelberg, Heidelberg, Germany
| | - Christian F Krebs
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Translational Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Division of Translational Immunology, III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Florian Grahammer
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Thorsten Wiech
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Institute of Pathology, Nephropathology Section, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Matthias Kretzler
- Department of Internal Medicine, Division of Nephrology, University of Michigan, Ann Arbor, MI, USA
| | - Catherine Meyer-Schwesinger
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Institute of Cellular and Integrative Physiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Stefan Bonn
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Institute of Medical Systems Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Translational Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Tobias B Huber
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany.
- Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
- Hamburg Center for Translational Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
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Hofmann S, Grahammer F, Edenhofer I, Puelles VG, Huber TB, Czogalla J. A high-throughput drug discovery pipeline to optimize kidney normothermic machine perfusion. Front Physiol 2022; 13:974615. [PMID: 36225295 PMCID: PMC9549958 DOI: 10.3389/fphys.2022.974615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 09/07/2022] [Indexed: 11/30/2022] Open
Abstract
Kidney transplantation is the only definitive therapy for end-stage kidney disease. The shortage of organs for transplantation is the main limitation of this life-saving treatment. Normothermic machine perfusion (NMP) is a novel preservation technique with the potential to increase the number of transplantable kidneys through reducing delayed graft function and organ evaluation under physiological conditions. To date, the cellular effects and possible pharmacological interventions during machine perfusion are incompletely understood. A major limitation is the technically complex, time-consuming, and small-scale replication of NMP in rodent models. To overcome this, we developed a 3D-printed, high throughput ex-vivo mouse kidney slice incubator (KSI) mimicking mouse kidney NMP by working under closely resembling conditions. KSI significantly reduced the time per experiment and increased the sample throughput (theoretical: 54 incubations with n = 500/day). The model recapitulated the cellular responses during NMP, namely increased endoplasmic reticulum stress (ER stress). Using KSI, five pharmacological interventions against ER stress taken from the literature were tested. While four were ineffective and excluded, one, β-Nicotinamide-adenine-dinucleotide (NADH), ameliorated ER stress significantly during KSI. The test of NADH in mouse kidney NMP replicated the positive effects against ER stress. This suggests that testing the addition of NADH during clinical kidney NMP might be warranted.
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Affiliation(s)
- Smilla Hofmann
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf UKE, Hamburg, Germany
| | - Florian Grahammer
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf UKE, Hamburg, Germany
- University Transplant Center, University Medical Center Hamburg-Eppendorf UKE, Hamburg, Germany
| | - Ilka Edenhofer
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf UKE, Hamburg, Germany
| | - Victor G. Puelles
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf UKE, Hamburg, Germany
- Department of Clinical Medicine, Division of Pathology, Aarhus University, Aarhus, Denmark
| | - Tobias B. Huber
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf UKE, Hamburg, Germany
- *Correspondence: Tobias B. Huber, ; Jan Czogalla,
| | - Jan Czogalla
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf UKE, Hamburg, Germany
- University Transplant Center, University Medical Center Hamburg-Eppendorf UKE, Hamburg, Germany
- *Correspondence: Tobias B. Huber, ; Jan Czogalla,
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6
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Wanner N, Andrieux G, Badia-I-Mompel P, Edler C, Pfefferle S, Lindenmeyer MT, Schmidt-Lauber C, Czogalla J, Wong MN, Okabayashi Y, Braun F, Lütgehetmann M, Meister E, Lu S, Noriega MLM, Günther T, Grundhoff A, Fischer N, Bräuninger H, Lindner D, Westermann D, Haas F, Roedl K, Kluge S, Addo MM, Huber S, Lohse AW, Reiser J, Ondruschka B, Sperhake JP, Saez-Rodriguez J, Boerries M, Hayek SS, Aepfelbacher M, Scaturro P, Puelles VG, Huber TB. Molecular consequences of SARS-CoV-2 liver tropism. Nat Metab 2022; 4:310-319. [PMID: 35347318 PMCID: PMC8964418 DOI: 10.1038/s42255-022-00552-6] [Citation(s) in RCA: 87] [Impact Index Per Article: 43.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 02/14/2022] [Indexed: 02/07/2023]
Abstract
Extrapulmonary manifestations of COVID-19 have gained attention due to their links to clinical outcomes and their potential long-term sequelae1. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) displays tropism towards several organs, including the heart and kidney. Whether it also directly affects the liver has been debated2,3. Here we provide clinical, histopathological, molecular and bioinformatic evidence for the hepatic tropism of SARS-CoV-2. We find that liver injury, indicated by a high frequency of abnormal liver function tests, is a common clinical feature of COVID-19 in two independent cohorts of patients with COVID-19 requiring hospitalization. Using autopsy samples obtained from a third patient cohort, we provide multiple levels of evidence for SARS-CoV-2 liver tropism, including viral RNA detection in 69% of autopsy liver specimens, and successful isolation of infectious SARS-CoV-2 from liver tissue postmortem. Furthermore, we identify transcription-, proteomic- and transcription factor-based activity profiles in hepatic autopsy samples, revealing similarities to the signatures associated with multiple other viral infections of the human liver. Together, we provide a comprehensive multimodal analysis of SARS-CoV-2 liver tropism, which increases our understanding of the molecular consequences of severe COVID-19 and could be useful for the identification of organ-specific pharmacological targets.
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Affiliation(s)
- Nicola Wanner
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Geoffroy Andrieux
- Institute of Medical Bioinformatics and Systems Medicine, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Pau Badia-I-Mompel
- Institute for Computational Biomedicine, Faculty of Medicine, Heidelberg University and Heidelberg University Hospital, BioQuant, Heidelberg, Germany
| | - Carolin Edler
- Institute of Legal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Susanne Pfefferle
- Institute of Medical Microbiology, Virology and Hygiene, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Maja T Lindenmeyer
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | - Jan Czogalla
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Milagros N Wong
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Yusuke Okabayashi
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Fabian Braun
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Marc Lütgehetmann
- Institute of Medical Microbiology, Virology and Hygiene, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Elisabeth Meister
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Shun Lu
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Maria L M Noriega
- Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Thomas Günther
- Leibniz Institute for Experimental Virology, Hamburg, Germany
| | - Adam Grundhoff
- Leibniz Institute for Experimental Virology, Hamburg, Germany
| | - Nicole Fischer
- Institute of Medical Microbiology, Virology and Hygiene, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Hanna Bräuninger
- Department of Cardiology, University Heart and Vascular Centre Hamburg, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Hamburg, Germany
| | - Diana Lindner
- Department of Cardiology, University Heart and Vascular Centre Hamburg, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Hamburg, Germany
| | - Dirk Westermann
- Department of Cardiology, University Heart and Vascular Centre Hamburg, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Hamburg, Germany
| | - Fabian Haas
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Kevin Roedl
- Department of Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Stefan Kluge
- Department of Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Marylyn M Addo
- I. Department of Medicine, University Medical Hospital Hamburg-Eppendorf, Hamburg, Germany
- German Center for Infection Research, Hamburg-Lübeck-Borstel-Riems, Hamburg, Germany
| | - Samuel Huber
- I. Department of Medicine, University Medical Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Ansgar W Lohse
- I. Department of Medicine, University Medical Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Jochen Reiser
- Department of Medicine, Rush University Medical Center, Chicago, IL, USA
| | - Benjamin Ondruschka
- Institute of Legal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jan P Sperhake
- Institute of Legal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Julio Saez-Rodriguez
- Institute for Computational Biomedicine, Faculty of Medicine, Heidelberg University and Heidelberg University Hospital, BioQuant, Heidelberg, Germany
| | - Melanie Boerries
- Institute of Medical Bioinformatics and Systems Medicine, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- German Cancer Consortium and German Cancer Research Center, Partner Site Freiburg, Freiburg, Germany
| | - Salim S Hayek
- Division of Cardiology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Martin Aepfelbacher
- Institute of Medical Microbiology, Virology and Hygiene, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Pietro Scaturro
- Leibniz Institute for Experimental Virology, Hamburg, Germany
| | - Victor G Puelles
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
| | - Tobias B Huber
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
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7
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Jansen J, Reimer KC, Nagai JS, Varghese FS, Overheul GJ, de Beer M, Roverts R, Daviran D, Fermin LA, Willemsen B, Beukenboom M, Djudjaj S, von Stillfried S, van Eijk LE, Mastik M, Bulthuis M, Dunnen WD, van Goor H, Hillebrands JL, Triana SH, Alexandrov T, Timm MC, van den Berge BT, van den Broek M, Nlandu Q, Heijnert J, Bindels EM, Hoogenboezem RM, Mooren F, Kuppe C, Miesen P, Grünberg K, Ijzermans T, Steenbergen EJ, Czogalla J, Schreuder MF, Sommerdijk N, Akiva A, Boor P, Puelles VG, Floege J, Huber TB, van Rij RP, Costa IG, Schneider RK, Smeets B, Kramann R, Achdout H, Aimon A, Bar-David E, Barr H, Ben-Shmuel A, Bennett J, Boby ML, Borden B, Bowman GR, Brun J, BVNBS S, Calmiano M, Carbery A, Cattermole E, Chernychenko E, Choder JD, Clyde A, Coffland JE, Cohen G, Cole J, Contini A, Cox L, Cvitkovic M, Dias A, Donckers K, Dotson DL, Douangamath A, Duberstein S, Dudgeon T, Dunnett L, Eastman PK, Erez N, Eyermann CJ, Fairhead M, Fate G, Fearon D, Federov O, Ferla M, Fernandes RS, Ferrins L, Foster R, Foster H, Gabizon R, Garcia-Sastre A, Gawriljuk VO, Gehrtz P, Gileadi C, Giroud C, Glass WG, Glen R, Itai glinert, Godoy AS, Gorichko M, Gorrie-Stone T, Griffen EJ, Hart SH, Heer J, Henry M, Hill M, Horrell S, Hurley MF, Israely T, Jajack A, Jnoff E, Jochmans D, John T, De Jonghe S, Kantsadi AL, Kenny PW, Kiappes J, Koekemoer L, Kovar B, Krojer T, Lee AA, Lefker BA, Levy H, London N, Lukacik P, Macdonald HB, Maclean B, Malla TR, Matviiuk T, McCorkindale W, McGovern BL, Melamed S, Michurin O, Mikolajek H, Milne BF, Morris A, Morris GM, Morwitzer MJ, Moustakas D, Nakamura AM, Neto JB, Neyts J, Nguyen L, Noske GD, Oleinikovas V, Oliva G, Overheul GJ, Owen D, Psenak V, Pai R, Pan J, Paran N, Perry B, Pingle M, Pinjari J, Politi B, Powell A, Puni R, Rangel VL, Reddi RN, Reid SP, Resnick E, Ripka EG, Robinson MC, Robinson RP, Rodriguez-Guerra J, Rosales R, Rufa D, Schofield C, Shafeev M, Shaikh A, Shi J, Shurrush K, Sing S, Sittner A, Skyner R, Smalley A, Smilova MD, Solmesky LJ, Spencer J, Strain-Damarell C, Swamy V, Tamir H, Tennant R, Thompson W, Thompson A, Thompson W, Tomasia S, Tumber A, Vakonakis I, van Rij RP, van Geel L, Varghese FS, Vaschetto M, Vitner EB, Voelz V, Volkamer A, von Delft F, von Delft A, Walsh M, Ward W, Weatherall C, Weiss S, White KM, Wild CF, Wittmann M, Wright N, Yahalom-Ronen Y, Zaidmann D, Zidane H, Zitzmann N. SARS-CoV-2 infects the human kidney and drives fibrosis in kidney organoids. Cell Stem Cell 2021; 29:217-231.e8. [PMID: 35032430 PMCID: PMC8709832 DOI: 10.1016/j.stem.2021.12.010] [Citation(s) in RCA: 121] [Impact Index Per Article: 40.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 09/03/2021] [Accepted: 12/16/2021] [Indexed: 12/20/2022]
Abstract
Kidney failure is frequently observed during and after COVID-19, but it remains elusive whether this is a direct effect of the virus. Here, we report that SARS-CoV-2 directly infects kidney cells and is associated with increased tubule-interstitial kidney fibrosis in patient autopsy samples. To study direct effects of the virus on the kidney independent of systemic effects of COVID-19, we infected human-induced pluripotent stem-cell-derived kidney organoids with SARS-CoV-2. Single-cell RNA sequencing indicated injury and dedifferentiation of infected cells with activation of profibrotic signaling pathways. Importantly, SARS-CoV-2 infection also led to increased collagen 1 protein expression in organoids. A SARS-CoV-2 protease inhibitor was able to ameliorate the infection of kidney cells by SARS-CoV-2. Our results suggest that SARS-CoV-2 can directly infect kidney cells and induce cell injury with subsequent fibrosis. These data could explain both acute kidney injury in COVID-19 patients and the development of chronic kidney disease in long COVID. COVID-19 patients present tubulo-interstitial kidney fibrosis compared with controls SARS-CoV-2 infection stimulates profibrotic signaling in human kidney organoids SARS-CoV-2 infection can be inhibited by a protease blocker in human kidney organoids
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8
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Cullen-McEwen LA, van der Wolde J, Haruhara K, Tribolet L, Dowling JP, Bertram MG, de Matteo R, Haas F, Czogalla J, Okabayashi Y, Armitage JA, Black MJ, Hoy WE, Puelles VG, Bertram JF. Podocyte endowment and the impact of adult body size on kidney health. Am J Physiol Renal Physiol 2021; 321:F322-F334. [PMID: 34308670 DOI: 10.1152/ajprenal.00029.2021] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 07/22/2021] [Indexed: 12/14/2022] Open
Abstract
Low birth weight is a risk factor for chronic kidney disease, whereas adult podocyte depletion is a key event in the pathogenesis of glomerulosclerosis. However, whether low birth weight due to poor maternal nutrition is associated with low podocyte endowment and glomerulosclerosis in later life is not known. Female Sprague-Dawley rats were fed a normal-protein diet (NPD; 20%) or low-protein diet (LPD; 8%), to induce low birth weight, from 3 wk before mating until postnatal day 21 (PN21), when kidneys from some male offspring were taken for quantitation of podocyte number and density in whole glomeruli using immunolabeling, tissue clearing, and confocal microscopy. The remaining offspring were fed a normal- or high-fat diet until 6 mo to induce catch-up growth and excessive weight gain, respectively. At PN21, podocyte number per glomerulus was 15% lower in low birth weight (LPD) than normal birth weight (NPD) offspring, with this deficit greater in outer glomeruli. Surprisingly, podocyte number in LPD offspring increased in outer glomeruli between PN21 and 6 mo, although an overall 9% podocyte deficit persisted. Postnatal fat feeding to LPD offspring did not alter podometric indexes or result in glomerular pathology at 6 mo, whereas fat feeding in NPD offspring was associated with far greater body and fat mass as well as podocyte loss, reduced podocyte density, albuminuria, and glomerulosclerosis. This is the first report that maternal diet can influence podocyte endowment. Our findings provide new insights into the impact of low birth weight, podocyte endowment, and postnatal weight on podometrics and kidney health in adulthood.NEW & NOTEWORTHY The present study shows, for the first time, that low birth weight as a result of maternal nutrition is associated with low podocyte endowment. However, a mild podocyte deficit at birth did not result in glomerular pathology in adulthood. In contrast, postnatal podocyte loss in combination with excessive body weight led to albuminuria and glomerulosclerosis. Taken together, these findings provide new insights into the associations between birth weight, podocyte indexes, postnatal weight, and glomerular pathology.
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Affiliation(s)
- Luise A Cullen-McEwen
- Stem Cells and Development Program, Monash Biomedicine Discovery Institute and Department of Anatomy and Developmental Biology, Monash University, Melbourne, Victoria, Australia
| | - James van der Wolde
- Stem Cells and Development Program, Monash Biomedicine Discovery Institute and Department of Anatomy and Developmental Biology, Monash University, Melbourne, Victoria, Australia
| | - Kotaro Haruhara
- Stem Cells and Development Program, Monash Biomedicine Discovery Institute and Department of Anatomy and Developmental Biology, Monash University, Melbourne, Victoria, Australia
- Division of Nephrology and Hypertension, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Leon Tribolet
- Stem Cells and Development Program, Monash Biomedicine Discovery Institute and Department of Anatomy and Developmental Biology, Monash University, Melbourne, Victoria, Australia
- Health and Biosecurity, CSIRO, Geelong, Victoria, Australia
| | - John P Dowling
- Department of Anatomical Pathology, Monash Medical Centre, Clayton, Victoria, Australia
| | - Michael G Bertram
- Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, Umea, Sweden
- School of Biological Sciences, Monash University, Melbourne, Victoria, Australia
| | - Robert de Matteo
- Stem Cells and Development Program, Monash Biomedicine Discovery Institute and Department of Anatomy and Developmental Biology, Monash University, Melbourne, Victoria, Australia
| | - Fabian Haas
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jan Czogalla
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Yusuke Okabayashi
- Division of Nephrology and Hypertension, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - James A Armitage
- School of Medicine (Optometry) and Institute for Mental and Physical Health and Clinical Translation, Deakin University, Waurn Ponds, Victoria, Australia
| | - M Jane Black
- Stem Cells and Development Program, Monash Biomedicine Discovery Institute and Department of Anatomy and Developmental Biology, Monash University, Melbourne, Victoria, Australia
| | - Wendy E Hoy
- Centre for Chronic Disease, University of Queensland, Royal Brisbane and Women's Hospital, Herston, Queensland, Australia
| | - Victor G Puelles
- Stem Cells and Development Program, Monash Biomedicine Discovery Institute and Department of Anatomy and Developmental Biology, Monash University, Melbourne, Victoria, Australia
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - John F Bertram
- Stem Cells and Development Program, Monash Biomedicine Discovery Institute and Department of Anatomy and Developmental Biology, Monash University, Melbourne, Victoria, Australia
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9
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Kluger MA, Czogalla J, Schmidt-Lauber C, Peine S, Schmiedel S, Bangert K, Kluge S, Huber S, Puelles VG, Fischer L, Huber TB, Grahammer F. Convalescent plasma treatment for early post-kidney transplant acquired COVID-19. Transpl Infect Dis 2021; 23:e13685. [PMID: 34251081 PMCID: PMC8420349 DOI: 10.1111/tid.13685] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 06/05/2021] [Accepted: 06/15/2021] [Indexed: 12/28/2022]
Affiliation(s)
- Malte A Kluger
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,University Transplant Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jan Czogalla
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,University Transplant Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Christian Schmidt-Lauber
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,University Transplant Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Sven Peine
- Institute for Transfusion Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Stefan Schmiedel
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Katrin Bangert
- Department of Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Stefan Kluge
- Department of Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Samuel Huber
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Victor G Puelles
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Lutz Fischer
- University Transplant Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Department of Visceral Transplant Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Tobias B Huber
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,University Transplant Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Florian Grahammer
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,University Transplant Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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10
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Czogalla J, Tariparast PA, Huber TB, Janneck M, Grahammer F. Surprising Hyperkalemia of 10.2 mmol/L in a Patient with Hyperglycemia: A Case Report. Case Rep Nephrol Dial 2021; 11:69-77. [PMID: 33829044 PMCID: PMC7991282 DOI: 10.1159/000512590] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 10/25/2020] [Indexed: 11/19/2022] Open
Abstract
Hyperkalemia is a life-threatening condition potentially leading to cardiac arrest. Here, we report a case of surprising severe hyperkalemia of 10.2 mmol/L in a diabetic patient with previously normal kidney function presenting without discernible clinical symptoms to our emergency department. The patient was admitted because of hyperglycemia of 32.8 mmol/L, which was detected during daily testing in her nursing home. The hyperkalemia was caused by prerenal failure due to hyperglycemic polyuria which led to volume depletion, and worsened by a combination of potassium-sparing drugs and potassium supplementation. The patient was treated conservatively. Eighteen hours later, the serum potassium concentration was 4.6 mmol/L. The patient could be released 6 days later. To our knowledge, this is the highest described hyperkalemia treated conservatively and survived without cardiopulmonary resuscitation.
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Affiliation(s)
- Jan Czogalla
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Pischtaz Adel Tariparast
- Department of Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Tobias B Huber
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Matthias Janneck
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Florian Grahammer
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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11
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Czogalla J, Grahammer F, Puelles VG, Huber TB. A protocol for rat kidney normothermic machine perfusion and subsequent transplantation. Artif Organs 2020; 45:168-174. [PMID: 32780541 DOI: 10.1111/aor.13799] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 08/04/2020] [Accepted: 08/07/2020] [Indexed: 02/06/2023]
Abstract
End-stage renal disease is a major global health burden. The only definitive treatment existing is renal transplantation. Worldwide, the demand for donated kidneys by far exceeds the supply. A novel technique for organ preservation, normothermic machine perfusion (NMP), now promises to increase the potential pool of available organs by extending the spectrum of donors and reducing the incidence of graft failure. First studies in humans and large animals are being performed with promising results, but refinement of the technique, buffer, and machines involved is labor-intensive and expensive. To our knowledge, this is the first report of a small animal model of NMP and subsequent transplantation.
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Affiliation(s)
- Jan Czogalla
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,University Transplant Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Florian Grahammer
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,University Transplant Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Victor G Puelles
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Tobias B Huber
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,University Transplant Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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12
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Komarynets O, Chassot A, Bernabeu E, Czogalla J, Roth I, Liaudet N, Prodon F, Loffing J, Feraille E. Aldosterone controls primary cilium length and cell size in renal collecting duct principal cells. FASEB J 2019; 34:2625-2640. [PMID: 31908048 DOI: 10.1096/fj.201901947r] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Revised: 11/20/2019] [Accepted: 12/05/2019] [Indexed: 12/12/2022]
Abstract
Primary cilia are nonmotile sensory organelles found on the surface of almost all kidney tubule epithelial cells. Being exposed to the tubular lumen, primary cilia are thought to be chemo- and mechanosensors of luminal composition and flux, respectively. We hypothesized that, Na+ transport and primary cilia exist in a sensory functional connection in mature renal tubule epithelial cells. Our results demonstrate that primary cilium length is reduced in mineralocorticoid receptor (MR) knockout (KO) mice in a cell autonomous manner along the aldosterone-sensitive distal nephron (ADSN) compared with wild type (as µm ± SEM; 3.1 ± 0.2 vs 4.0 ± 0.1). In mouse cortical collecting duct (mCCD)cl1 cells, which are a model of collecting duct (CD) principal cells, changes in Na+ transport intensity were found to mediate primary cilium length in response to aldosterone (as µm ± SEM: control: 2.7 ± 0.9 vs aldosterone treated: 3.8 ± 0.8). Cilium length was positively correlated with the availability of IFT88, a major intraflagellar anterograde transport complex B component, which is stabilized in response to exposure to aldosterone treatment. This suggests that the abundance of IFT88 is a regulated, rate limiting factor in the elongation of primary cilia. As previously observed in vivo, aldosterone treatment increased cell volume of cultured CD principal cells. Knockdown of IFT88 prevents ciliogenesis and inhibits the adaptive increase in cell size that was observed in response to aldosterone treatment. In conclusion, our results reveal a functional connection between Na+ transport, primary cilia, and cell size, which may play a key role in the morphological and functional adaptation of the CD to sustained changes in active Na+ reabsorption due to variations in aldosterone secretion.
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Affiliation(s)
- Olga Komarynets
- Department of Cell Physiology and Metabolism, Faculty of Medicine of Geneva, University Medical Center, University of Geneva, Geneva, Switzerland
| | - Alexandra Chassot
- Department of Cell Physiology and Metabolism, Faculty of Medicine of Geneva, University Medical Center, University of Geneva, Geneva, Switzerland
| | - Eva Bernabeu
- Department of Cell Physiology and Metabolism, Faculty of Medicine of Geneva, University Medical Center, University of Geneva, Geneva, Switzerland
| | - Jan Czogalla
- Institute of Anatomy, University of Zürich, Zürich, Switzerland
| | - Isabelle Roth
- Department of Cell Physiology and Metabolism, Faculty of Medicine of Geneva, University Medical Center, University of Geneva, Geneva, Switzerland
| | - Nicolas Liaudet
- Service of Bioimaging, University of Geneva, Geneva, Switzerland
| | - François Prodon
- Service of Bioimaging, University of Geneva, Geneva, Switzerland
| | | | - Eric Feraille
- Department of Cell Physiology and Metabolism, Faculty of Medicine of Geneva, University Medical Center, University of Geneva, Geneva, Switzerland
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13
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Penton D, Moser S, Wengi A, Czogalla J, Rosenbaek LL, Rigendinger F, Faresse N, Martins JR, Fenton RA, Loffing-Cueni D, Loffing J. Protein Phosphatase 1 Inhibitor-1 Mediates the cAMP-Dependent Stimulation of the Renal NaCl Cotransporter. J Am Soc Nephrol 2019; 30:737-750. [PMID: 30902838 DOI: 10.1681/asn.2018050540] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 02/06/2019] [Indexed: 11/03/2022] Open
Abstract
BACKGROUND A number of cAMP-elevating hormones stimulate phosphorylation (and hence activity) of the NaCl cotransporter (NCC) in the distal convoluted tubule (DCT). Evidence suggests that protein phosphatase 1 (PP1) and other protein phosphatases modulate NCC phosphorylation, but little is known about PP1's role and the mechanism regulating its function in the DCT. METHODS We used ex vivo mouse kidney preparations to test whether a DCT-enriched inhibitor of PP1, protein phosphatase 1 inhibitor-1 (I1), mediates cAMP's effects on NCC, and conducted yeast two-hybrid and coimmunoprecipitation experiments in NCC-expressing MDCK cells to explore protein interactions. RESULTS Treating isolated DCTs with forskolin and IBMX increased NCC phosphorylation via a protein kinase A (PKA)-dependent pathway. Ex vivo incubation of mouse kidney slices with isoproterenol, norepinephrine, and parathyroid hormone similarly increased NCC phosphorylation. The cAMP-induced stimulation of NCC phosphorylation strongly correlated with the phosphorylation of I1 at its PKA consensus phosphorylation site (a threonine residue in position 35). We also found an interaction between NCC and the I1-target PP1. Moreover, PP1 dephosphorylated NCC in vitro, and the PP1 inhibitor calyculin A increased NCC phosphorylation. Studies in kidney slices and isolated perfused kidneys of control and I1-KO mice demonstrated that I1 participates in the cAMP-induced stimulation of NCC. CONCLUSIONS Our data suggest a complete signal transduction pathway by which cAMP increases NCC phosphorylation via a PKA-dependent phosphorylation of I1 and subsequent inhibition of PP1. This pathway might be relevant for the physiologic regulation of renal sodium handling by cAMP-elevating hormones, and may contribute to salt-sensitive hypertension in patients with endocrine disorders or sympathetic hyperactivity.
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Affiliation(s)
- David Penton
- Institute of Anatomy, University of Zurich, Zurich, Switzerland.,Swiss National Centre for Competence in Research "Kidney Control of Homeostasis," Zurich, Switzerland
| | - Sandra Moser
- Institute of Anatomy, University of Zurich, Zurich, Switzerland
| | - Agnieszka Wengi
- Institute of Anatomy, University of Zurich, Zurich, Switzerland
| | - Jan Czogalla
- Institute of Anatomy, University of Zurich, Zurich, Switzerland.,Swiss National Centre for Competence in Research "Kidney Control of Homeostasis," Zurich, Switzerland
| | - Lena Lindtoft Rosenbaek
- Department of Biomedicine, Aarhus University, Aarhus, Denmark; and.,Department of Neuroscience, University of Copenhagen, Copenhagen, Denmark
| | | | - Nourdine Faresse
- Institute of Anatomy, University of Zurich, Zurich, Switzerland.,Swiss National Centre for Competence in Research "Kidney Control of Homeostasis," Zurich, Switzerland
| | - Joana R Martins
- Institute of Anatomy, University of Zurich, Zurich, Switzerland.,Swiss National Centre for Competence in Research "Kidney Control of Homeostasis," Zurich, Switzerland
| | - Robert A Fenton
- Department of Biomedicine, Aarhus University, Aarhus, Denmark; and
| | | | - Johannes Loffing
- Institute of Anatomy, University of Zurich, Zurich, Switzerland; .,Swiss National Centre for Competence in Research "Kidney Control of Homeostasis," Zurich, Switzerland
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14
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Ribas DP, Moser S, Wengi A, Czogalla J, Rosenbaek LL, Faresse N, Fenton R, Loffing‐Cueni D, Loffing J. The β‐adrenergic stimulation of the renal NaCl cotransporter is mediated via a cAMP‐dependent activation of protein phosphatase 1 inhibitor 1. FASEB J 2018. [DOI: 10.1096/fasebj.2018.32.1_supplement.624.23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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15
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Abstract
The mouse isolated perfused kidney (MIPK) is a technique for keeping a mouse kidney under ex vivo conditions perfused and functional for 1 hr. This is a prerequisite for studying the physiology of the isolated organ and for many innovative applications that may be possible in the future, including perfusion decellularization for kidney bioengineering or the administration of anti-rejection or genome-editing drugs in high doses to prime the kidney for transplantation. During the time of the perfusion, the kidney can be manipulated, renal function can be assessed, and various pharmaceuticals administered. After the procedure, the kidney can be transplanted or processed for molecular biology, biochemical analysis, or microscopy. This paper describes the perfusate and the surgical technique needed for the ex vivo perfusion of mouse kidneys. Details of the perfusion apparatus are given and data are presented showing the viability of the kidney's preparation: renal blood flow, vascular resistance, and urine data as functional, transmission electron micrographs of different nephron segments as morphological readouts, and western blots of transport proteins of different nephron segments as molecular readout.
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Affiliation(s)
- Jan Czogalla
- Institute of Anatomy, Swiss National Centre of Competence in Research Kidney, University of Zürich;
| | | | - Johannes Loffing
- Institute of Anatomy, Swiss National Centre of Competence in Research Kidney, University of Zürich
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16
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Penton D, Czogalla J, Wengi A, Himmerkus N, Loffing-Cueni D, Carrel M, Rajaram RD, Staub O, Bleich M, Schweda F, Loffing J. Extracellular K + rapidly controls NaCl cotransporter phosphorylation in the native distal convoluted tubule by Cl - -dependent and independent mechanisms. J Physiol 2016; 594:6319-6331. [PMID: 27457700 DOI: 10.1113/jp272504] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 07/14/2016] [Indexed: 12/12/2022] Open
Abstract
KEY POINTS High dietary potassium (K+ ) intake dephosphorylates and inactivates the NaCl cotransporter (NCC) in the renal distal convoluted tubule (DCT). Using several ex vivo models, we show that physiological changes in extracellular K+ , similar to those occurring after a K+ rich diet, are sufficient to promote a very rapid dephosphorylation of NCC in native DCT cells. Although the increase of NCC phosphorylation upon decreased extracellular K+ appears to depend on cellular Cl- fluxes, the rapid NCC dephosphorylation in response to increased extracellular K+ is not Cl- -dependent. The Cl- -dependent pathway involves the SPAK/OSR1 kinases, whereas the Cl- independent pathway may include additional signalling cascades. ABSTRACT A high dietary potassium (K+ ) intake causes a rapid dephosphorylation, and hence inactivation, of the thiazide-sensitive NaCl cotransporter (NCC) in the renal distal convoluted tubule (DCT). Based on experiments in heterologous expression systems, it was proposed that changes in extracellular K+ concentration ([K+ ]ex ) modulate NCC phosphorylation via a Cl- -dependent modulation of the with no lysine (K) kinases (WNK)-STE20/SPS-1-44 related proline-alanine-rich protein kinase (SPAK)/oxidative stress-related kinase (OSR1) kinase pathway. We used the isolated perfused mouse kidney technique and ex vivo preparations of mouse kidney slices to test the physiological relevance of this model on native DCT. We demonstrate that NCC phosphorylation inversely correlates with [K+ ]ex , with the most prominent effects occurring around physiological plasma [K+ ]. Cellular Cl- conductances and the kinases SPAK/OSR1 are involved in the phosphorylation of NCC under low [K+ ]ex . However, NCC dephosphorylation triggered by high [K+ ]ex is neither blocked by removing extracellular Cl- , nor by the Cl- channel blocker 4,4'-diisothiocyano-2,2'-stilbenedisulphonic acid. The response to [K+ ]ex on a low extracellular chloride concentration is also independent of significant changes in SPAK/OSR1 phosphorylation. Thus, in the native DCT, [K+ ]ex directly and rapidly controls NCC phosphorylation by Cl- -dependent and independent pathways that involve the kinases SPAK/OSR1 and a yet unidentified additional signalling mechanism.
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Affiliation(s)
- David Penton
- Institute of Anatomy, University of Zurich, Zurich, Switzerland.,Swiss National Centre of Competence in Research 'Kidney Control of Homeostasis', University of Zurich, Zurich, Switzerland
| | - Jan Czogalla
- Institute of Anatomy, University of Zurich, Zurich, Switzerland.,Swiss National Centre of Competence in Research 'Kidney Control of Homeostasis', University of Zurich, Zurich, Switzerland
| | - Agnieszka Wengi
- Institute of Anatomy, University of Zurich, Zurich, Switzerland
| | - Nina Himmerkus
- Institute of Physiology, Christian-Albrecht University, Kiel, Germany
| | | | - Monique Carrel
- Institute of Anatomy, University of Zurich, Zurich, Switzerland
| | - Renuga Devi Rajaram
- Department of Pharmacology and Toxicology, University of Lausanne, Lausanne, Switzerland.,Swiss National Centre of Competence in Research 'Kidney Control of Homeostasis', University of Zurich, Zurich, Switzerland
| | - Olivier Staub
- Department of Pharmacology and Toxicology, University of Lausanne, Lausanne, Switzerland.,Swiss National Centre of Competence in Research 'Kidney Control of Homeostasis', University of Zurich, Zurich, Switzerland
| | - Markus Bleich
- Institute of Physiology, Christian-Albrecht University, Kiel, Germany
| | - Frank Schweda
- Institute of Physiology, University of Regensburg, Regensburg, Germany
| | - Johannes Loffing
- Institute of Anatomy, University of Zurich, Zurich, Switzerland. .,Swiss National Centre of Competence in Research 'Kidney Control of Homeostasis', University of Zurich, Zurich, Switzerland.
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17
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Czogalla J, Vohra T, Penton D, Kirschmann M, Craigie E, Loffing J. The mineralocorticoid receptor (MR) regulates ENaC but not NCC in mice with random MR deletion. Pflugers Arch 2016; 468:849-58. [PMID: 26898302 DOI: 10.1007/s00424-016-1798-5] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Revised: 02/03/2016] [Accepted: 02/08/2016] [Indexed: 12/13/2022]
Abstract
Aldosterone binds to the mineralocorticoid receptor (MR) and increases renal Na(+) reabsorption via up-regulation of the epithelial Na(+) channel (ENaC) and the Na(+)-K(+)-ATPase in the collecting system (CS) and possibly also via the NaCl cotransporter (NCC) in the distal convoluted tubule (DCT). However, whether aldosterone directly regulates NCC via MR or indirectly through systemic alterations remains controversial. We used mice with deletion of MR in ∼20 % of renal tubule cells (MR/X mice), in which MR-positive (MR(wt)) and -negative (MR(ko)) cells can be studied side-by-side in the same physiological context. Adult MR/X mice showed similar mRNA and protein levels of renal ion transport proteins to control mice. In MR/X mice, no differences in NCC abundance and phosphorylation was seen between MR(wt) and MR(ko) cells and dietary Na(+) restriction up-regulated NCC to similar extent in both groups of cells. In contrast, MR(ko) cells in the CS did not show any detectable alpha-ENaC abundance or apical targeting of ENaC neither on control diet nor in response to dietary Na(+) restriction. Furthermore, Na(+)-K(+)-ATPase expression was unaffected in MR(ko) cells of the DCT, while it was lost in MR(ko) cells of the CS. In conclusion, MR is crucial for ENaC and Na(+)-K(+)-ATPase regulation in the CS, but is dispensable for NCC and Na(+)-K(+)-ATPase regulation in the DCT.
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Affiliation(s)
- Jan Czogalla
- Institute of Anatomy, University of Zurich, Winterthurerstrasse 190, CH-8057, Zurich, Switzerland.,Swiss National Centre for Competence in Research "Kidney Control of Homeostasis", Zurich, Switzerland
| | - Twinkle Vohra
- Institute of Anatomy, University of Zurich, Winterthurerstrasse 190, CH-8057, Zurich, Switzerland
| | - David Penton
- Institute of Anatomy, University of Zurich, Winterthurerstrasse 190, CH-8057, Zurich, Switzerland.,Swiss National Centre for Competence in Research "Kidney Control of Homeostasis", Zurich, Switzerland
| | - Moritz Kirschmann
- Center for Microscopy and Image Analysis, University of Zurich, Zurich, Switzerland
| | - Eilidh Craigie
- Institute of Anatomy, University of Zurich, Winterthurerstrasse 190, CH-8057, Zurich, Switzerland.,Swiss National Centre for Competence in Research "Kidney Control of Homeostasis", Zurich, Switzerland
| | - Johannes Loffing
- Institute of Anatomy, University of Zurich, Winterthurerstrasse 190, CH-8057, Zurich, Switzerland. .,Swiss National Centre for Competence in Research "Kidney Control of Homeostasis", Zurich, Switzerland.
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18
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Penton D, Czogalla J, Loffing J. Dietary potassium and the renal control of salt balance and blood pressure. Pflugers Arch 2015; 467:513-30. [PMID: 25559844 DOI: 10.1007/s00424-014-1673-1] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Revised: 12/10/2014] [Accepted: 12/11/2014] [Indexed: 01/09/2023]
Abstract
Dietary potassium (K(+)) intake has antihypertensive effects, prevents strokes, and improves cardiovascular outcomes. The underlying mechanism for these beneficial effects of high K(+) diets may include vasodilation, enhanced urine flow, reduced renal renin release, and negative sodium (Na(+)) balance. Indeed, several studies demonstrate that dietary K(+) intake induces renal Na(+) loss despite elevated plasma aldosterone. This review briefly highlights the epidemiological and experimental evidences for the effects of dietary K(+) on arterial blood pressure. It discusses the pivotal role of the renal distal tubule for the regulation of urinary K(+) and Na(+) excretion and blood pressure and highlights that it depends on the coordinated interaction of different nephron portions, epithelial cell types, and various ion channels, transporters, and ATPases. Moreover, we discuss the relevance of aldosterone and aldosterone-independent factors in mediating the effects of an altered K(+) intake on renal K(+) and Na(+) handling. Particular focus is given to findings suggesting that an aldosterone-independent downregulation of the thiazide-sensitive NaCl cotransporter significantly contributes to the natriuretic and antihypertensive effect of a K(+)-rich diet. Last but not least, we refer to the complex signaling pathways enabling the kidney to adapt its function to the homeostatic needs in response to an altered K(+) intake. Future work will have to further address the underlying cellular and molecular mechanism and to elucidate, among others, how an altered dietary K(+) intake is sensed and how this signal is transmitted to the different epithelial cells lining the distal tubule.
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Affiliation(s)
- David Penton
- Institute of Anatomy, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
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19
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Fu Y, Masuda T, Eguchi A, Czogalla J, Rose M, Kuczkowski A, Gerasimova M, Feldstein A, Scadeng M, Vallon V. Dipeptidyl peptidase‐4 inhibitor lowers PPARγ agonist‐induced body weight gain by affecting food intake, fat mass and beige/brown fat but not fluid retention (1160.9). FASEB J 2014. [DOI: 10.1096/fasebj.28.1_supplement.1160.9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yiling Fu
- Veterans Affairs, San Diego Healthcare SystemSan DiegoCAUnited States
| | - Takahiro Masuda
- Department of Medicine University of California San DiegoLA JollaCAUnited States
- Veterans Affairs, San Diego Healthcare SystemSan DiegoCAUnited States
| | - Akiko Eguchi
- Department of Pediatrics University of California San DiegoLA JollaCAUnited States
| | - Jan Czogalla
- Department of Medicine University of California San DiegoLA JollaCAUnited States
- Veterans Affairs, San Diego Healthcare SystemSan DiegoCAUnited States
| | - Michael Rose
- Veterans Affairs, San Diego Healthcare SystemSan DiegoCAUnited States
| | - Alexander Kuczkowski
- Department of Medicine University of California San DiegoLA JollaCAUnited States
- Veterans Affairs, San Diego Healthcare SystemSan DiegoCAUnited States
| | - Maria Gerasimova
- Veterans Affairs, San Diego Healthcare SystemSan DiegoCAUnited States
| | - Ariel Feldstein
- Department of Pediatrics University of California San DiegoLA JollaCAUnited States
| | - Miriam Scadeng
- Department of Radiology University of California San DiegoLA JollaCAUnited States
| | - Volker Vallon
- Department of Pharmacology University of California San DiegoLA JollaCAUnited States
- Department of Medicine University of California San DiegoLA JollaCAUnited States
- Veterans Affairs, San Diego Healthcare SystemSan DiegoCAUnited States
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20
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Masuda T, Fu Y, Eguchi A, Czogalla J, Rose MA, Kuczkowski A, Gerasimova M, Feldstein AE, Scadeng M, Vallon V. Dipeptidyl peptidase IV inhibitor lowers PPARγ agonist-induced body weight gain by affecting food intake, fat mass, and beige/brown fat but not fluid retention. Am J Physiol Endocrinol Metab 2014; 306:E388-98. [PMID: 24347054 PMCID: PMC3923087 DOI: 10.1152/ajpendo.00124.2013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Peroxisome proliferator-activated receptor-γ (PPARγ) agonists like pioglitazone (PGZ) are effective antidiabetic drugs, but they induce fluid retention and body weight (BW) gain. Dipeptidyl peptidase IV (DPP IV) inhibitors are antidiabetic drugs that enhance renal Na(+) and fluid excretion. Therefore, we examined whether the DPP IV inhibitor alogliptin (ALG) ameliorates PGZ-induced BW gain. Male Sv129 mice were treated with vehicle (repelleted diet), PGZ (220 mg/kg diet), ALG (300 mg/kg diet), or a combination of PGZ and ALG (PGZ + ALG) for 14 days. PGZ + ALG prevented the increase in BW observed with PGZ but did not attenuate the increase in body fluid content determined by bioimpedance spectroscopy (BIS). BIS revealed that ALG alone had no effect on fat mass (FM) but enhanced the FM-lowering effect of PGZ; MRI analysis confirmed the latter and showed reductions in visceral and inguinal subcutaneous (sc) white adipose tissue (WAT). ALG but not PGZ decreased food intake and plasma free fatty acid concentrations. Conversely, PGZ but not ALG increased mRNA expression of thermogenesis mediator uncoupling protein 1 in epididymal WAT. Adding ALG to PGZ treatment increased the abundance of multilocular cell islets in sc WAT, and PGZ + ALG increased the expression of brown-fat-like "beige" cell marker TMEM26 in sc WAT and interscapular brown adipose tissue and increased rectal temperature vs. vehicle. In summary, DPP IV inhibition did not attenuate PPARγ agonist-induced fluid retention but prevented BW gain by reducing FM. This involved ALG inhibition of food intake and was associated with food intake-independent synergistic effects of PPARγ agonism and DPP-IV inhibition on beige/brown fat cells and thermogenesis.
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