1
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Brandt PJ, Stepanchuk AA, Andonegui G, Benediktsson H, Stys PK, Muruve DA. Detection and Typing of Renal Amyloidosis by Fluorescence Spectroscopy Using the Environmentally Sensitive Fluorophore K114. Mol Imaging Biol 2023; 25:221-227. [PMID: 35857157 DOI: 10.1007/s11307-022-01754-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 02/07/2022] [Revised: 06/27/2022] [Accepted: 07/05/2022] [Indexed: 10/17/2022]
Abstract
PURPOSE To demonstrate that spectral analysis using the K114 fluorophore can detect and differentiate AL and AA renal amyloidosis. PROCEDURES Kidney biopsies from patients with AL amyloidosis, AA amyloidosis, and normal samples with no evident pathology were stained with Congo Red and K114. The specimens were imaged on a spectral confocal microscope. RESULTS Congo Red displayed homogeneous spectra across the three tissue types while K114 chromatically distinguished between normal tissue, AL amyloid, and AA amyloid. Additionally, Congo Red displayed an increased risk of false positive staining compared to K114. Spectral phasors computed from K114-stained tissue sections quantitatively differentiated the three tissue types. K114-stained amyloid deposits displayed a significantly greater increase in brightness after 50 images acquired in rapid succession compared to normal tissue. Quantitative analysis of intensity changes in the background of diseased tissue also differentiated AL and AA amyloid samples, suggesting widespread amyloid deposition. Both amyloid and the backgrounds of diseased samples red-shifted while normal tissue blue-shifted in response to repeated imaging, supporting this theory. CONCLUSIONS K114 staining of renal biopsies is a promising technique to detect and differentiate types of renal amyloidosis. Due to the advantages this method has over traditional Congo Red staining, the techniques presented here warrant further development for potential use in clinical settings.
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Affiliation(s)
- Paula J Brandt
- Department of Medicine, University of Calgary, Calgary, AB, Canada.,Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada.,Cumming School of Medicine, University of Calgary, 3280 Hospital Dr. NW, Calgary, AB, Canada
| | - Anastasiia A Stepanchuk
- Cumming School of Medicine, University of Calgary, 3280 Hospital Dr. NW, Calgary, AB, Canada.,Department of Clinical Neurosciences, University of Calgary, Calgary, AB, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Graciela Andonegui
- Department of Medicine, University of Calgary, Calgary, AB, Canada.,Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada.,Cumming School of Medicine, University of Calgary, 3280 Hospital Dr. NW, Calgary, AB, Canada
| | - Hallgrimur Benediktsson
- Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada.,Cumming School of Medicine, University of Calgary, 3280 Hospital Dr. NW, Calgary, AB, Canada.,Department of Pathology and Laboratory Medicine, University of Calgary, Calgary, AB, Canada
| | - Peter K Stys
- Cumming School of Medicine, University of Calgary, 3280 Hospital Dr. NW, Calgary, AB, Canada.,Department of Clinical Neurosciences, University of Calgary, Calgary, AB, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Daniel A Muruve
- Department of Medicine, University of Calgary, Calgary, AB, Canada. .,Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada. .,Cumming School of Medicine, University of Calgary, 3280 Hospital Dr. NW, Calgary, AB, Canada.
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2
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Sarden N, Sinha S, Potts KG, Pernet E, Hiroki CH, Hassanabad MF, Nguyen AP, Lou Y, Farias R, Winston BW, Bromley A, Snarr BD, Zucoloto AZ, Andonegui G, Muruve DA, McDonald B, Sheppard DC, Mahoney DJ, Divangahi M, Rosin N, Biernaskie J, Yipp BG. A B1a-natural IgG-neutrophil axis is impaired in viral- and steroid-associated aspergillosis. Sci Transl Med 2022; 14:eabq6682. [PMID: 36475902 DOI: 10.1126/scitranslmed.abq6682] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The lung naturally resists Aspergillus fumigatus (Af) in healthy individuals, but multiple conditions can disrupt this resistance, leading to lethal invasive infections. Core processes of natural resistance and its breakdown are undefined. We investigated three distinct conditions predisposing to lethal aspergillosis-severe SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) infection, influenza A viral pneumonia, and systemic corticosteroid use-in human patients and murine models. We found a conserved and essential coupling of innate B1a lymphocytes, Af-binding natural immunoglobulin G antibodies, and lung neutrophils. Failure of this axis concealed Af from neutrophils, allowing rapid fungal invasion and disease. Reconstituting the axis with immunoglobulin therapy reestablished resistance, thus representing a realistic pathway to repurpose currently available therapies. Together, we report a vital host resistance pathway that is responsible for protecting against life-threatening aspergillosis in the context of distinct susceptibilities.
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Affiliation(s)
- Nicole Sarden
- Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada.,Department of Critical Care Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Sarthak Sinha
- Department of Comparative Biology and Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4Z6, Canada
| | - Kyle G Potts
- Arnie Charbonneau Cancer Institute, Departments of Biochemistry and Molecular Biology and Microbiology, Immunology, and Infectious Diseases, University of Calgary, Calgary, AB T2N 4Z6, Canada
| | - Erwan Pernet
- Meakins-Christie Laboratories, Departments of Medicine and Pathology, McGill International TB Centre, McGill University, Montreal, QC H4A 3JI, Canada.,Department of Microbiology and Immunology, McGill University, Montreal, QC H3A 2B4, Canada
| | - Carlos H Hiroki
- Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada.,Department of Critical Care Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Mortaza F Hassanabad
- Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada.,Department of Critical Care Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Angela P Nguyen
- Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada.,Department of Critical Care Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Yuefei Lou
- Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada.,Department of Critical Care Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Raquel Farias
- Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada.,Department of Critical Care Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Brent W Winston
- Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada.,Department of Critical Care Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Amy Bromley
- Department of Pathology and Laboratory Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Brendan D Snarr
- Department of Microbiology and Immunology, McGill University, Montreal, QC H3A 2B4, Canada
| | - Amanda Z Zucoloto
- Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada.,Department of Critical Care Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Graciela Andonegui
- Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Daniel A Muruve
- Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Braedon McDonald
- Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada.,Department of Critical Care Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Donald C Sheppard
- Department of Microbiology and Immunology, McGill University, Montreal, QC H3A 2B4, Canada.,Division of Infectious Diseases and Department of Medical Microbiology, McGill University Health Centre, Montreal, QC H4A 3JI, Canada
| | - Douglas J Mahoney
- Arnie Charbonneau Cancer Institute, Departments of Biochemistry and Molecular Biology and Microbiology, Immunology, and Infectious Diseases, University of Calgary, Calgary, AB T2N 4Z6, Canada
| | - Maziar Divangahi
- Meakins-Christie Laboratories, Departments of Medicine and Pathology, McGill International TB Centre, McGill University, Montreal, QC H4A 3JI, Canada.,Department of Microbiology and Immunology, McGill University, Montreal, QC H3A 2B4, Canada
| | - Nicole Rosin
- Department of Comparative Biology and Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4Z6, Canada
| | - Jeff Biernaskie
- Department of Comparative Biology and Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4Z6, Canada
| | - Bryan G Yipp
- Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada.,Department of Critical Care Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada
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3
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von Mässenhausen A, Zamora Gonzalez N, Maremonti F, Belavgeni A, Tonnus W, Meyer C, Beer K, Hannani MT, Lau A, Peitzsch M, Hoppenz P, Locke S, Chavakis T, Kramann R, Muruve DA, Hugo C, Bornstein SR, Linkermann A. Dexamethasone sensitizes to ferroptosis by glucocorticoid receptor-induced dipeptidase-1 expression and glutathione depletion. Sci Adv 2022; 8:eabl8920. [PMID: 35108055 PMCID: PMC8809683 DOI: 10.1126/sciadv.abl8920] [Citation(s) in RCA: 39] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Dexamethasone is widely used as an immunosuppressive therapy and recently as COVID-19 treatment. Here, we demonstrate that dexamethasone sensitizes to ferroptosis, a form of iron-catalyzed necrosis, previously suggested to contribute to diseases such as acute kidney injury, myocardial infarction, and stroke, all of which are triggered by glutathione (GSH) depletion. GSH levels were significantly decreased by dexamethasone. Mechanistically, we identified that dexamethasone up-regulated the GSH metabolism regulating protein dipeptidase-1 (DPEP1) in a glucocorticoid receptor (GR)-dependent manner. DPEP1 knockdown reversed the phenotype of dexamethasone-induced ferroptosis sensitization. Ferroptosis inhibitors, the DPEP1 inhibitor cilastatin, or genetic DPEP1 inactivation reversed the dexamethasone-induced increase in tubular necrosis in freshly isolated renal tubules. Our data indicate that dexamethasone sensitizes to ferroptosis by a GR-mediated increase in DPEP1 expression and GSH depletion. Together, we identified a previously unknown mechanism of glucocorticoid-mediated sensitization to ferroptosis bearing clinical and therapeutic implications.
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Affiliation(s)
- Anne von Mässenhausen
- Division of Nephrology, Department of Internal Medicine 3, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Dresden, Germany
- Biotechnology Center, Technische Universität Dresden, 01307 Dresden, Germany
| | - Nadia Zamora Gonzalez
- Division of Nephrology, Department of Internal Medicine 3, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Dresden, Germany
- Biotechnology Center, Technische Universität Dresden, 01307 Dresden, Germany
| | - Francesca Maremonti
- Division of Nephrology, Department of Internal Medicine 3, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Dresden, Germany
- Biotechnology Center, Technische Universität Dresden, 01307 Dresden, Germany
| | - Alexia Belavgeni
- Division of Nephrology, Department of Internal Medicine 3, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Dresden, Germany
- Biotechnology Center, Technische Universität Dresden, 01307 Dresden, Germany
| | - Wulf Tonnus
- Division of Nephrology, Department of Internal Medicine 3, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Dresden, Germany
- Biotechnology Center, Technische Universität Dresden, 01307 Dresden, Germany
| | - Claudia Meyer
- Division of Nephrology, Department of Internal Medicine 3, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Dresden, Germany
- Biotechnology Center, Technische Universität Dresden, 01307 Dresden, Germany
| | - Kristina Beer
- Division of Nephrology, Department of Internal Medicine 3, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Dresden, Germany
- Biotechnology Center, Technische Universität Dresden, 01307 Dresden, Germany
| | - Monica T. Hannani
- Clinic for Renal and Hypertensive Disorders, Rheumatological and Immunological Disease, University Hospital of the RWTH Aachen, Aachen 52074, Germany
- Heidelberg University, Faculty of Medicine, and Heidelberg University Hospital, Institute for Computational Biomedicine, Bioquant, Heidelberg, Germany
| | - Arthur Lau
- Department of Medicine, University of Calgary, Calgary, Canada
- Snyder Institute for Chronic Disease, University of Calgary, Calgary, Canada
| | - Mirko Peitzsch
- Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Fetscherstrasse 74, Dresden 01307, Germany
| | - Paul Hoppenz
- Division of Nephrology, Department of Internal Medicine 3, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Dresden, Germany
- Biotechnology Center, Technische Universität Dresden, 01307 Dresden, Germany
| | - Sophie Locke
- Division of Nephrology, Department of Internal Medicine 3, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Dresden, Germany
- Biotechnology Center, Technische Universität Dresden, 01307 Dresden, Germany
| | - Triantafyllos Chavakis
- Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Fetscherstrasse 74, Dresden 01307, Germany
| | - Rafael Kramann
- Clinic for Renal and Hypertensive Disorders, Rheumatological and Immunological Disease, University Hospital of the RWTH Aachen, Aachen 52074, Germany
- Department of Internal Medicine, Nephrology and Transplantation, Erasmus Medical Center, 3015 GD Rotterdam, Netherlands
| | - Daniel A. Muruve
- Department of Medicine, University of Calgary, Calgary, Canada
- Snyder Institute for Chronic Disease, University of Calgary, Calgary, Canada
| | - Christian Hugo
- Division of Nephrology, Department of Internal Medicine 3, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Dresden, Germany
| | - Stefan R. Bornstein
- Department of Internal Medicine 3, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Dresden, Germany
- Diabetes and Nutritional Sciences, King’s College London, London, UK
- Center for Regenerative Therapies, Technische Universität Dresden, Dresden, Germany
- Paul Langerhans Institute Dresden of Helmholtz Centre Munich at University Clinic Carl Gustav Carus of TU Dresden Faculty of Medicine, Dresden, Germany
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
| | - Andreas Linkermann
- Division of Nephrology, Department of Internal Medicine 3, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Dresden, Germany
- Biotechnology Center, Technische Universität Dresden, 01307 Dresden, Germany
- Corresponding author.
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4
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Lau A, Rahn JJ, Chappellaz M, Chung H, Benediktsson H, Bihan D, von Mässenhausen A, Linkermann A, Jenne CN, Robbins SM, Senger DL, Lewis IA, Chun J, Muruve DA. Dipeptidase-1 governs renal inflammation during ischemia reperfusion injury. Sci Adv 2022; 8:eabm0142. [PMID: 35108057 PMCID: PMC8809686 DOI: 10.1126/sciadv.abm0142] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The mechanisms that drive leukocyte recruitment to the kidney are incompletely understood. Dipeptidase-1 (DPEP1) is a major neutrophil adhesion receptor highly expressed on proximal tubular cells and peritubular capillaries of the kidney. Renal ischemia reperfusion injury (IRI) induces robust neutrophil and monocyte recruitment and causes acute kidney injury (AKI). Renal inflammation and the AKI phenotype were attenuated in Dpep1-/- mice or mice pretreated with DPEP1 antagonists, including the LSALT peptide, a nonenzymatic DPEP1 inhibitor. DPEP1 deficiency or inhibition primarily blocked neutrophil adhesion to peritubular capillaries and reduced inflammatory monocyte recruitment to the kidney after IRI. CD44 but not ICAM-1 blockade also decreased neutrophil recruitment to the kidney during IRI and was additive to DPEP1 effects. DPEP1, CD44, and ICAM-1 all contributed to the recruitment of monocyte/macrophages to the kidney following IRI. These results identify DPEP1 as a major leukocyte adhesion receptor in the kidney and potential therapeutic target for AKI.
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Affiliation(s)
- Arthur Lau
- Department of Medicine, Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Jennifer J. Rahn
- Department of Medicine, Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Mona Chappellaz
- Department of Medicine, Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Hyunjae Chung
- Department of Medicine, Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Hallgrimur Benediktsson
- Department of Pathology and Laboratory Medicine, Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Dominique Bihan
- Department of Biological Sciences, University of Calgary, Calgary, Canada
| | - Anne von Mässenhausen
- Division of Nephrology, Department of Internal Medicine 3, University Hospital Carl Gustav Carus and Biotechnology Center, Technische Universität Dresden, Dresden 01307, Germany
| | - Andreas Linkermann
- Division of Nephrology, Department of Internal Medicine 3, University Hospital Carl Gustav Carus and Biotechnology Center, Technische Universität Dresden, Dresden 01307, Germany
| | - Craig N. Jenne
- Department of Microbiology, Immunology and Infectious Diseases, Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Stephen M. Robbins
- Department of Oncology, Arnie Charbonneau Cancer Institute, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Donna L. Senger
- Department of Oncology, Arnie Charbonneau Cancer Institute, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Ian A. Lewis
- Department of Biological Sciences, University of Calgary, Calgary, Canada
| | - Justin Chun
- Department of Medicine, Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Daniel A. Muruve
- Department of Medicine, Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Corresponding author.
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5
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Chung H, Komada T, Lau A, Chappellaz M, Platnich JM, de Koning HD, Petri B, Luque Y, Walker S, Benediktsson H, Mesnard L, Chun J, Muruve DA. AIM2 Suppresses Inflammation and Epithelial Cell Proliferation during Glomerulonephritis. J Immunol 2021; 207:2799-2812. [PMID: 34740957 DOI: 10.4049/jimmunol.2100483] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 09/28/2021] [Indexed: 11/19/2022]
Abstract
Absent in melanoma-2 (AIM2) is an inflammasome-forming innate immune sensor for dsDNA but also exhibits inflammasome-independent functions such as restricting cellular proliferation. AIM2 is expressed in the kidney, but its localization and function are not fully characterized. In normal human glomeruli, AIM2 localized to podocytes. In patients with glomerulonephritis, AIM2 expression increased in CD44+-activated parietal epithelial cells within glomerular crescents. To explore AIM2 effects in glomerular disease, studies in Aim2 -/- mice were performed. Aim2-/- glomeruli showed reduced expression of Wilm tumor gene-1 (WT1), WT1-driven podocyte genes, and increased proliferation in outgrowth assays. In a nephrotoxic serum (NTS)-induced glomerulonephritis model, Aim2-/- (B6) mice exhibited more severe glomerular crescent formation, tubular injury, inflammation, and proteinuria compared with wild-type controls. Inflammasome activation markers were absent in both Aim2 -/- and wild-type kidneys, despite an increased inflammatory transcriptomic signature in Aim2 -/- mice. Aim2 -/- mice also demonstrated dysregulated cellular proliferation and an increase in CD44+ parietal epithelial cells during glomerulonephritis. The augmented inflammation and epithelial cell proliferation in Aim2 -/- (B6) mice was not due to genetic background, as Aim2 -/- (B6.129) mice demonstrated a similar phenotype during NTS glomerulonephritis. The AIM2-like receptor (ALR) locus was necessary for the inflammatory glomerulonephritis phenotype observed in Aim2 -/- mice, as NTS-treated ALR -/- mice displayed equal levels of injury as wild-type controls. Podocyte outgrowth from ALR -/- glomeruli was still increased, however, confirming that the ALR locus is dispensable for AIM2 effects on epithelial cell proliferation. These results identify a noncanonical role for AIM2 in suppressing inflammation and epithelial cell proliferation during glomerulonephritis.
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Affiliation(s)
- Hyunjae Chung
- Department of Medicine, Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Takanori Komada
- Department of Medicine, Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Arthur Lau
- Department of Medicine, Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Mona Chappellaz
- Department of Medicine, Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Jaye M Platnich
- Department of Medicine, Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Heleen D de Koning
- Department of Dermatology, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Björn Petri
- Department of Microbiology, Immunology and Infectious Diseases, Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Yosu Luque
- Soins Intensifs Néphrologiques et Rein Aigu (SINRA), Département de Néphrologie, Hôpital Tenon, Assistance Publique-Hôpitaux de Paris, Inserm UMR_S1155, Sorbonne Université, Paris, France; and
| | - Simon Walker
- Department of Pathology and Laboratory Medicine, Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Hallgrimur Benediktsson
- Department of Pathology and Laboratory Medicine, Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Laurent Mesnard
- Soins Intensifs Néphrologiques et Rein Aigu (SINRA), Département de Néphrologie, Hôpital Tenon, Assistance Publique-Hôpitaux de Paris, Inserm UMR_S1155, Sorbonne Université, Paris, France; and
| | - Justin Chun
- Department of Medicine, Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Daniel A Muruve
- Department of Medicine, Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada;
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6
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Huang J, Gandini MA, Chen L, M'Dahoma S, Stemkowski PL, Chung H, Muruve DA, Zamponi GW. Hyperactivity of Innate Immunity Triggers Pain via TLR2-IL-33-Mediated Neuroimmune Crosstalk. Cell Rep 2021; 33:108233. [PMID: 33027646 DOI: 10.1016/j.celrep.2020.108233] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [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: 04/10/2020] [Revised: 07/27/2020] [Accepted: 09/15/2020] [Indexed: 01/09/2023] Open
Abstract
The innate immune system responds to infections that give rise to pain. How the innate immune system interacts with the sensory nervous system and contributes to pain is poorly understood. Here we report that hyperactivity of innate immunity primes and initiates pain states via the TLR2-interleukin-33 (IL-33) axis. Toll-like receptors (TLRs) are upregulated in the complete Freund's adjuvant (CFA) pain model, and knockout of TLR2 abolishes CFA-induced pain. Selective activation of TLR2/6 triggers acute pain via upregulation of IL-33 in the hindpaw, dorsal root ganglia (DRG), and spinal cord in an NLRP3-dependent manner. The IL-33 increase further initiates priming of nociceptive neurons and pain states. Finally, blocking IL-33 receptors at the spinal level mediates analgesia during acute and chronic inflammatory pain, underscoring an important function of IL-33 in pain signaling. Collectively, our data reveal a critical role of the TLR2-IL-33 axis in innate immune activation for pain initiation and maintenance.
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Affiliation(s)
- Junting Huang
- Department of Physiology and Pharmacology, Hotchkiss Brain Institute and Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada.
| | - Maria A Gandini
- Department of Physiology and Pharmacology, Hotchkiss Brain Institute and Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Lina Chen
- Department of Physiology and Pharmacology, Hotchkiss Brain Institute and Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Said M'Dahoma
- Department of Physiology and Pharmacology, Hotchkiss Brain Institute and Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Patrick L Stemkowski
- Department of Physiology and Pharmacology, Hotchkiss Brain Institute and Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Hyunjae Chung
- Department of Medicine, Snyder Institute for Chronic Disease, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Daniel A Muruve
- Department of Medicine, Snyder Institute for Chronic Disease, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Gerald W Zamponi
- Department of Physiology and Pharmacology, Hotchkiss Brain Institute and Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada.
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7
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Qirjazi E, Kaunda J, Andersen T, Peterson J, Iwaasa K, MacRae J, Berenger BM, Missaghi B, Conly JM, Muruve DA. SARS-CoV-2 Shedding in Dialysis Patients With COVID-19. Kidney Int Rep 2021; 6:2897-2899. [PMID: 34466759 PMCID: PMC8393503 DOI: 10.1016/j.ekir.2021.08.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 07/19/2021] [Accepted: 08/16/2021] [Indexed: 11/30/2022] Open
Affiliation(s)
- Elena Qirjazi
- Department of Medicine, Cumming School of Medicine, University of Calgary, and Alberta Health Services, Calgary, Alberta, Canada.,Alberta Kidney Care South, Alberta Health Services, Alberta, Canada
| | - Joseph Kaunda
- Infection Prevention and Control, Calgary Zone, Alberta Health Services, Alberta, Canada
| | - Tamalee Andersen
- Infection Prevention and Control, Calgary Zone, Alberta Health Services, Alberta, Canada
| | - Joanne Peterson
- Alberta Kidney Care South, Alberta Health Services, Alberta, Canada
| | - Kathryn Iwaasa
- Alberta Kidney Care South, Alberta Health Services, Alberta, Canada
| | - Jennifer MacRae
- Department of Medicine, Cumming School of Medicine, University of Calgary, and Alberta Health Services, Calgary, Alberta, Canada.,Alberta Kidney Care South, Alberta Health Services, Alberta, Canada
| | - Byron M Berenger
- Public Health Laboratory, Alberta Precision Laboratories, Calgary, Alberta, Canada.,Department of Pathology and Laboratory Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Bayan Missaghi
- Department of Medicine, Cumming School of Medicine, University of Calgary, and Alberta Health Services, Calgary, Alberta, Canada.,Infection Prevention and Control, Calgary Zone, Alberta Health Services, Alberta, Canada
| | - John M Conly
- Department of Medicine, Cumming School of Medicine, University of Calgary, and Alberta Health Services, Calgary, Alberta, Canada.,Infection Prevention and Control, Calgary Zone, Alberta Health Services, Alberta, Canada.,Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada.,O' Brien Institute for Public Health, University of Calgary, Calgary, Alberta, Canada
| | - Daniel A Muruve
- Department of Medicine, Cumming School of Medicine, University of Calgary, and Alberta Health Services, Calgary, Alberta, Canada.,Alberta Kidney Care South, Alberta Health Services, Alberta, Canada.,Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
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8
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Simms EL, Chung H, Oberding L, Muruve DA, McDonald B, Bromley A, Pillai DR, Chun J. Post-mortem molecular investigations of SARS-CoV-2 in an unexpected death of a recent kidney transplant recipient. Am J Transplant 2021; 21:2590-2595. [PMID: 33624432 PMCID: PMC8013510 DOI: 10.1111/ajt.16549] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Revised: 01/31/2021] [Accepted: 02/17/2021] [Indexed: 01/25/2023]
Abstract
Solid organ transplant recipients are vulnerable to severe infection during induction therapy. We report a case of a 67-year-old male who died unexpectedly 10 days after receiving a kidney transplant on February 10, 2020. There was no clear cause of death, but COVID-19 was considered retrospectively, as the death occurred shortly after the first confirmed case of COVID-19 in Canada. We confirmed the presence of SARS-CoV-2 components in the renal allograft and native lung tissue using immunohistochemistry for SARS-CoV-2 spike protein and RNA scope in situ hybridization for SARS-CoV-2 RNA. Results were reaffirmed with the Food and Drug Administration Emergency Use Authorization approved Bio-Rad SARS-CoV-2 digital droplet PCR for the kidney specimen. Our case highlights the importance of patient autopsies in an unfolding global pandemic and demonstrates the utility of molecular assays to diagnose SARS-CoV-2 post-mortem. SARS-CoV-2 infection during induction therapy may portend a fatal clinical outcome. We also suggest COVID-19 may be transmittable via renal transplant.
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Affiliation(s)
- Emily Lauren Simms
- Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Hyunjae Chung
- Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - Lisa Oberding
- Department of Pathology and Laboratory Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Daniel A. Muruve
- Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada,Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - Braedon McDonald
- Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada,Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada,Department of Critical Care Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Amy Bromley
- Department of Pathology and Laboratory Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Dylan R. Pillai
- Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada,Department of Pathology and Laboratory Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Justin Chun
- Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada,Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada,Correspondence Justin Chun, Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.
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9
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Bracey NA, Platnich JM, Lau A, Chung H, Hyndman ME, MacDonald JA, Chun J, Beck PL, Girardin SE, Gordon PM, Muruve DA. Tissue-selective alternate promoters guide NLRP6 expression. Life Sci Alliance 2020; 4:4/3/e202000897. [PMID: 33376129 PMCID: PMC7772780 DOI: 10.26508/lsa.202000897] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 08/28/2020] [Revised: 12/12/2020] [Accepted: 12/15/2020] [Indexed: 12/14/2022] Open
Abstract
The NLRP6 innate immune sensor is regulated by tissue-selective alternate promoters that facilitate translational gene silencing outside of the intestinal epithelium in both humans and mice. The pryin domain (PYD) domain is involved in protein interactions that lead to assembly of immune-sensing complexes such as inflammasomes. The repertoire of PYD-containing genes expressed by a cell type arms tissues with responses against a range of stimuli. The transcriptional regulation of the PYD gene family however is incompletely understood. Alternative promoter utilization was identified as a mechanism regulating the tissue distribution of human PYD gene family members, including NLRP6 that is translationally silenced outside of intestinal tissue. Results show that alternative transcriptional promoters mediate NLRP6 silencing in mice and humans, despite no upstream genomic synteny. Human NLRP6 contains an internal alternative promoter within exon 2 of the PYD, resulting in a truncated mRNA in nonintestinal tissue. In mice, a proximal promoter was used that expanded the 5′ leader sequence restricting nuclear export and abolishing translational efficiency. Nlrp6 was dispensable in disease models targeting the kidney, which expresses noncanonical isoforms. Thus, alternative promoter use is a critical mechanism not just for isoform modulation but for determining expression profile and function of PYD family members.
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Affiliation(s)
- Nathan A Bracey
- Department of Medicine, University of Calgary, Calgary, Canada.,Snyder Institute for Chronic Disease, University of Calgary, Calgary, Canada
| | - Jaye M Platnich
- Department of Medicine, University of Alberta, Edmonton, Canada
| | - Arthur Lau
- Department of Medicine, University of Calgary, Calgary, Canada.,Snyder Institute for Chronic Disease, University of Calgary, Calgary, Canada
| | - Hyunjae Chung
- Department of Medicine, University of Calgary, Calgary, Canada.,Snyder Institute for Chronic Disease, University of Calgary, Calgary, Canada
| | - M Eric Hyndman
- Department of Surgery, University of Calgary, Calgary, Canada
| | - Justin A MacDonald
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Canada
| | - Justin Chun
- Department of Medicine, University of Calgary, Calgary, Canada.,Snyder Institute for Chronic Disease, University of Calgary, Calgary, Canada
| | - Paul L Beck
- Department of Medicine, University of Calgary, Calgary, Canada.,Snyder Institute for Chronic Disease, University of Calgary, Calgary, Canada
| | - Stephen E Girardin
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada
| | - Paul Mk Gordon
- Centre for Health Genomics and Informatics, University of Calgary, Calgary, Canada
| | - Daniel A Muruve
- Department of Medicine, University of Calgary, Calgary, Canada .,Snyder Institute for Chronic Disease, University of Calgary, Calgary, Canada
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10
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Choudhury SR, Babes L, Rahn JJ, Ahn BY, Goring KAR, King JC, Lau A, Petri B, Hao X, Chojnacki AK, Thanabalasuriar A, McAvoy EF, Tabariès S, Schraeder C, Patel KD, Siegel PM, Kopciuk KA, Schriemer DC, Muruve DA, Kelly MM, Yipp BG, Kubes P, Robbins SM, Senger DL. Dipeptidase-1 Is an Adhesion Receptor for Neutrophil Recruitment in Lungs and Liver. Cell 2020; 178:1205-1221.e17. [PMID: 31442408 DOI: 10.1016/j.cell.2019.07.017] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [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: 12/12/2017] [Revised: 05/14/2019] [Accepted: 07/11/2019] [Indexed: 12/22/2022]
Abstract
A hallmark feature of inflammation is the orchestrated recruitment of neutrophils from the bloodstream into inflamed tissue. Although selectins and integrins mediate recruitment in many tissues, they have a minimal role in the lungs and liver. Exploiting an unbiased in vivo functional screen, we identified a lung and liver homing peptide that functionally abrogates neutrophil recruitment to these organs. Using biochemical, genetic, and confocal intravital imaging approaches, we identified dipeptidase-1 (DPEP1) as the target and established its role as a physical adhesion receptor for neutrophil sequestration independent of its enzymatic activity. Importantly, genetic ablation or functional peptide blocking of DPEP1 significantly reduced neutrophil recruitment to the lungs and liver and provided improved survival in models of endotoxemia. Our data establish DPEP1 as a major adhesion receptor on the lung and liver endothelium and identify a therapeutic target for neutrophil-driven inflammatory diseases of the lungs.
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Affiliation(s)
- Saurav Roy Choudhury
- Arnie Charbonneau Cancer Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Liane Babes
- Arnie Charbonneau Cancer Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada; Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Jennifer J Rahn
- Arnie Charbonneau Cancer Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Bo-Young Ahn
- Arnie Charbonneau Cancer Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Kimberly-Ann R Goring
- Arnie Charbonneau Cancer Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Jennifer C King
- Arnie Charbonneau Cancer Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Arthur Lau
- Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Björn Petri
- Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada; Snyder Institute for Chronic Diseases Mouse Phenomics Resource Laboratory, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada; Department of Microbiology, Immunology and Infectious Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Xiaoguang Hao
- Arnie Charbonneau Cancer Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Andrew K Chojnacki
- Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Ajitha Thanabalasuriar
- Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Erin F McAvoy
- Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Sébastien Tabariès
- Goodman Cancer Research Centre, McGill University, Montreal, QC H3A 1A3, Canada
| | - Christoph Schraeder
- Arnie Charbonneau Cancer Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada; Department of Biochemistry and Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Kamala D Patel
- Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada; Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Peter M Siegel
- Goodman Cancer Research Centre, McGill University, Montreal, QC H3A 1A3, Canada
| | - Karen A Kopciuk
- Arnie Charbonneau Cancer Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada; Department of Oncology, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada; Department of Cancer Epidemiology and Prevention Research, CancerControl Alberta, Alberta Health Services, Calgary, AB T2S 3C3, Canada
| | - David C Schriemer
- Arnie Charbonneau Cancer Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada; Department of Biochemistry and Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Daniel A Muruve
- Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada; Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Margaret M Kelly
- Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada; Department of Pathology and Laboratory Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Bryan G Yipp
- Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada; Department of Critical Care Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Paul Kubes
- Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada; Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Stephen M Robbins
- Arnie Charbonneau Cancer Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada; Department of Biochemistry and Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada; Department of Oncology, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Donna L Senger
- Arnie Charbonneau Cancer Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada; Department of Oncology, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada.
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11
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Abstract
Inflammasomes are multiprotein innate immune complexes that regulate caspase-dependent inflammation and cell death. Pattern recognition receptors, such as nucleotide-binding oligomerization domain (NOD)-like receptors and absent in melanoma 2 (AIM2)-like receptors, sense danger signals or cellular events to activate canonical inflammasomes, resulting in caspase 1 activation, pyroptosis and the secretion of IL-1β and IL-18. Non-canonical inflammasomes can be activated by intracellular lipopolysaccharides, toxins and some cell signalling pathways. These inflammasomes regulate the activation of alternative caspases (caspase 4, caspase 5, caspase 11 and caspase 8) that lead to pyroptosis, apoptosis and the regulation of other cellular pathways. Many inflammasome-related genes and proteins have been implicated in animal models of kidney disease. In particular, the NLRP3 (NOD-, LRR- and pyrin domain-containing 3) inflammasome has been shown to contribute to a wide range of acute and chronic microbial and non-microbial kidney diseases via canonical and non-canonical mechanisms that regulate inflammation, pyroptosis, apoptosis and fibrosis. In patients with chronic kidney disease, immunomodulation therapies targeting IL-1β such as canakinumab have been shown to prevent cardiovascular events. Moreover, findings in experimental models of kidney disease suggest that small-molecule inhibitors targeting NLRP3 and other inflammasome components are promising therapeutic agents.
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Affiliation(s)
- Takanori Komada
- Division of Inflammation Research, Center for Molecular Medicine, Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Daniel A Muruve
- Department of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada.
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12
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Smith A, Iablokov V, Mazza M, Guarnerio S, Denti V, Ivanova M, Stella M, Piga I, Chinello C, Heijs B, van Veelen PA, Benediktsson H, Muruve DA, Magni F. Detecting Proteomic Indicators to Distinguish Diabetic Nephropathy from Hypertensive Nephrosclerosis by Integrating Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry Imaging with High-Mass Accuracy Mass Spectrometry. Kidney Blood Press Res 2020; 45:233-248. [PMID: 32062660 DOI: 10.1159/000505187] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [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: 06/17/2019] [Accepted: 12/02/2019] [Indexed: 11/19/2022] Open
Abstract
INTRODUCTION Diabetic nephropathy (DN) and hypertensive nephrosclerosis (HN) represent the most common causes of chronic kidney disease (CKD) and many patients progress to -end-stage renal disease. Patients are treated primarily through the management of cardiovas-cular risk factors and hypertension; however patients with HN have a more favorable outcome. A noninvasive clinical approach to separate these two entities, especially in hypertensive patients who also have diabetes, would allow for targeted treatment and more appropriate resource allocation to those patients at the highest risk of CKD progression. Meth-ods: In this preliminary study, high-spatial-resolution matrix-assisted laser desorption/ion-ization (MALDI) mass spectrometry imaging (MSI) was integrated with high-mass accuracy MALDI-FTICR-MS and nLC-ESI-MS/MS analysis in order to detect tissue proteins within kidney biopsies to discriminate cases of DN (n = 9) from cases of HN (n = 9). RESULTS Differences in the tryptic peptide profiles of the 2 groups could clearly be detected, with these becoming even more evident in the more severe histological classes, even if this was not evident with routine histology. In particular, 4 putative proteins were detected and had a higher signal intensity within regions of DN tissue with extensive sclerosis or fibrosis. Among these, 2 proteins (PGRMC1 and CO3) had a signal intensity that increased at the latter stages of the disease and may be associated with progression. DISCUSSION/CONCLUSION This preliminary study represents a valuable starting point for a future study employing a larger cohort of patients to develop sensitive and specific protein biomarkers that could reliably differentiate between diabetic and hypertensive causes of CKD to allow for improved diagnosis, fewer biopsy procedures, and refined treatment approaches for clinicians.
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Affiliation(s)
- Andrew Smith
- Department of Medicine and Surgery, Clinical Proteomics and Metabolomics Unit, University of Milano-Bicocca, Vedano al Lambro, Italy
| | - Vadim Iablokov
- Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Mariafrancesca Mazza
- Department of Medicine and Surgery, Clinical Proteomics and Metabolomics Unit, University of Milano-Bicocca, Vedano al Lambro, Italy
| | - Sonia Guarnerio
- Department of Medicine and Surgery, Clinical Proteomics and Metabolomics Unit, University of Milano-Bicocca, Vedano al Lambro, Italy
| | - Vanna Denti
- Department of Medicine and Surgery, Clinical Proteomics and Metabolomics Unit, University of Milano-Bicocca, Vedano al Lambro, Italy
| | - Mariia Ivanova
- Department of Medicine and Surgery, Clinical Proteomics and Metabolomics Unit, University of Milano-Bicocca, Vedano al Lambro, Italy
| | - Martina Stella
- Department of Medicine and Surgery, Clinical Proteomics and Metabolomics Unit, University of Milano-Bicocca, Vedano al Lambro, Italy
| | - Isabella Piga
- Department of Medicine and Surgery, Clinical Proteomics and Metabolomics Unit, University of Milano-Bicocca, Vedano al Lambro, Italy
| | - Clizia Chinello
- Department of Medicine and Surgery, Clinical Proteomics and Metabolomics Unit, University of Milano-Bicocca, Vedano al Lambro, Italy
| | - Bram Heijs
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
| | - Peter A van Veelen
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
| | - Hallgrimur Benediktsson
- Department of Pathology and Laboratory Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Daniel A Muruve
- Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Fulvio Magni
- Department of Medicine and Surgery, Clinical Proteomics and Metabolomics Unit, University of Milano-Bicocca, Vedano al Lambro, Italy,
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13
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Platnich JM, Chung H, Lau A, Sandall CF, Bondzi-Simpson A, Chen HM, Komada T, Trotman-Grant AC, Brandelli JR, Chun J, Beck PL, Philpott DJ, Girardin SE, Ho M, Johnson RP, MacDonald JA, Armstrong GD, Muruve DA. Shiga Toxin/Lipopolysaccharide Activates Caspase-4 and Gasdermin D to Trigger Mitochondrial Reactive Oxygen Species Upstream of the NLRP3 Inflammasome. Cell Rep 2019; 25:1525-1536.e7. [PMID: 30404007 DOI: 10.1016/j.celrep.2018.09.071] [Citation(s) in RCA: 105] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2017] [Revised: 06/04/2018] [Accepted: 09/21/2018] [Indexed: 01/11/2023] Open
Abstract
The non-canonical caspase-4 and canonical NLRP3 inflammasomes are both activated by intracellular lipopolysaccharide (LPS), but the crosstalk between these two pathways remains unclear. Shiga toxin 2 (Stx2)/LPS complex, from pathogenic enterohemorrhagic Escherichia coli, activates caspase-4, gasdermin D (GSDMD), and the NLRP3 inflammasome in human THP-1 macrophages, but not mouse macrophages that lack the Stx receptor CD77. Stx2/LPS-mediated IL-1β secretion and pyroptosis are dependent on mitochondrial reactive oxygen species (ROS) downstream of the non-canonical caspase-4 inflammasome and cleaved GSDMD, which is enriched at the mitochondria. Blockade of caspase-4 activation and ROS generation as well as GSDMD deficiency significantly reduces Stx2/LPS-induced IL-1β production and pyroptosis. The NLRP3 inflammasome plays a significant role in amplifying Stx2/LPS-induced GSDMD cleavage and pyroptosis, with significant reduction of these responses in NLRP3-deficient THP-1 cells. Together, these data show that Stx2/LPS complex activates the non-canonical inflammasome and mitochondrial ROS upstream of the NLRP3 inflammasome to promote cytokine maturation and pyroptosis.
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Affiliation(s)
- Jaye M Platnich
- Department of Medicine, University of Calgary, Calgary, AB, Canada; Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - Hyunjae Chung
- Department of Medicine, University of Calgary, Calgary, AB, Canada; Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - Arthur Lau
- Department of Medicine, University of Calgary, Calgary, AB, Canada; Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - Christina F Sandall
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, AB, Canada
| | - Adom Bondzi-Simpson
- Department of Medicine, University of Calgary, Calgary, AB, Canada; Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - Huey-Miin Chen
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, AB, Canada
| | - Takanori Komada
- Department of Medicine, University of Calgary, Calgary, AB, Canada; Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | | | - Jeremy R Brandelli
- Department of Microbiology, Immunology & Infectious Diseases, University of Calgary, Calgary, AB, Canada; Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - Justin Chun
- Department of Medicine, University of Calgary, Calgary, AB, Canada; Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - Paul L Beck
- Department of Medicine, University of Calgary, Calgary, AB, Canada; Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - Dana J Philpott
- Department of Immunology, University of Toronto, Toronto, ON, Canada
| | - Stephen E Girardin
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
| | - May Ho
- Department of Microbiology, Immunology & Infectious Diseases, University of Calgary, Calgary, AB, Canada; Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - Roger P Johnson
- Public Health Agency of Canada, National Microbiology Laboratory, Guelph, ON, Canada
| | - Justin A MacDonald
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, AB, Canada
| | - Glen D Armstrong
- Department of Microbiology, Immunology & Infectious Diseases, University of Calgary, Calgary, AB, Canada; Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - Daniel A Muruve
- Department of Medicine, University of Calgary, Calgary, AB, Canada; Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada.
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14
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Perissinotti L, Guo J, Kudaibergenova M, Lees-Miller J, Ol'khovich M, Sharapova A, Perlovich GL, Muruve DA, Gerull B, Noskov SY, Duff HJ. The Pore-Lipid Interface: Role of Amino-Acid Determinants of Lipophilic Access by Ivabradine to the hERG1 Pore Domain. Mol Pharmacol 2019; 96:259-271. [PMID: 31182542 DOI: 10.1124/mol.118.115642] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 05/28/2019] [Indexed: 12/14/2022] Open
Abstract
Abnormal cardiac electrical activity is a common side effect caused by unintended block of the promiscuous drug target human ether-à-go-go-related gene (hERG1), the pore-forming domain of the delayed rectifier K+ channel in the heart. hERG1 block leads to a prolongation of the QT interval, a phase of the cardiac cycle that underlies myocyte repolarization detectable on the electrocardiogram. Even newly released drugs such as heart-rate lowering agent ivabradine block the rapid delayed rectifier current IKr, prolong action potential duration, and induce potentially lethal arrhythmia known as torsades de pointes. In this study, we describe a critical drug-binding pocket located at the lateral pore surface facing the cellular membrane. Mutations of the conserved M651 residue alter ivabradine-induced block but not by the common hERG1 blocker dofetilide. As revealed by molecular dynamics simulations, binding of ivabradine to a lipophilic pore access site is coupled to a state-dependent reorientation of aromatic residues F557 and F656 in the S5 and S6 helices. We show that the M651 mutation impedes state-dependent dynamics of F557 and F656 aromatic cassettes at the protein-lipid interface, which has a potential to disrupt drug-induced block of the channel. This fundamentally new mechanism coupling the channel dynamics and small-molecule access from the membrane into the hERG1 intracavitary site provides a simple rationale for the well established state-dependence of drug blockade. SIGNIFICANCE STATEMENT: The drug interference with the function of the cardiac hERG channels represents one of the major sources of drug-induced heart disturbances. We found a novel and a critical drug-binding pocket adjacent to a lipid-facing surface of the hERG1 channel, which furthers our molecular understanding of drug-induced QT syndrome.
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Affiliation(s)
- Laura Perissinotti
- Centre for Molecular Simulation, Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada (L.P., M.K., S.Y.N.); Libin Cardiovascular Institute of Alberta (J.G., J.-L.M., H.J.D.) and Snyder Institute for Chronic Diseases (D.A.M.), Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada; Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo, Russian Federation (M.O., A.S., G.L.P.); Department of Cardiac Sciences and Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada (B.G.); and Comprehensive Heart Failure Center and Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany (B.G.)
| | - Jiqing Guo
- Centre for Molecular Simulation, Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada (L.P., M.K., S.Y.N.); Libin Cardiovascular Institute of Alberta (J.G., J.-L.M., H.J.D.) and Snyder Institute for Chronic Diseases (D.A.M.), Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada; Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo, Russian Federation (M.O., A.S., G.L.P.); Department of Cardiac Sciences and Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada (B.G.); and Comprehensive Heart Failure Center and Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany (B.G.)
| | - Meruyert Kudaibergenova
- Centre for Molecular Simulation, Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada (L.P., M.K., S.Y.N.); Libin Cardiovascular Institute of Alberta (J.G., J.-L.M., H.J.D.) and Snyder Institute for Chronic Diseases (D.A.M.), Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada; Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo, Russian Federation (M.O., A.S., G.L.P.); Department of Cardiac Sciences and Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada (B.G.); and Comprehensive Heart Failure Center and Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany (B.G.)
| | - James Lees-Miller
- Centre for Molecular Simulation, Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada (L.P., M.K., S.Y.N.); Libin Cardiovascular Institute of Alberta (J.G., J.-L.M., H.J.D.) and Snyder Institute for Chronic Diseases (D.A.M.), Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada; Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo, Russian Federation (M.O., A.S., G.L.P.); Department of Cardiac Sciences and Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada (B.G.); and Comprehensive Heart Failure Center and Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany (B.G.)
| | - Marina Ol'khovich
- Centre for Molecular Simulation, Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada (L.P., M.K., S.Y.N.); Libin Cardiovascular Institute of Alberta (J.G., J.-L.M., H.J.D.) and Snyder Institute for Chronic Diseases (D.A.M.), Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada; Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo, Russian Federation (M.O., A.S., G.L.P.); Department of Cardiac Sciences and Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada (B.G.); and Comprehensive Heart Failure Center and Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany (B.G.)
| | - Angelica Sharapova
- Centre for Molecular Simulation, Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada (L.P., M.K., S.Y.N.); Libin Cardiovascular Institute of Alberta (J.G., J.-L.M., H.J.D.) and Snyder Institute for Chronic Diseases (D.A.M.), Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada; Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo, Russian Federation (M.O., A.S., G.L.P.); Department of Cardiac Sciences and Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada (B.G.); and Comprehensive Heart Failure Center and Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany (B.G.)
| | - German L Perlovich
- Centre for Molecular Simulation, Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada (L.P., M.K., S.Y.N.); Libin Cardiovascular Institute of Alberta (J.G., J.-L.M., H.J.D.) and Snyder Institute for Chronic Diseases (D.A.M.), Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada; Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo, Russian Federation (M.O., A.S., G.L.P.); Department of Cardiac Sciences and Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada (B.G.); and Comprehensive Heart Failure Center and Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany (B.G.)
| | - Daniel A Muruve
- Centre for Molecular Simulation, Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada (L.P., M.K., S.Y.N.); Libin Cardiovascular Institute of Alberta (J.G., J.-L.M., H.J.D.) and Snyder Institute for Chronic Diseases (D.A.M.), Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada; Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo, Russian Federation (M.O., A.S., G.L.P.); Department of Cardiac Sciences and Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada (B.G.); and Comprehensive Heart Failure Center and Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany (B.G.)
| | - Brenda Gerull
- Centre for Molecular Simulation, Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada (L.P., M.K., S.Y.N.); Libin Cardiovascular Institute of Alberta (J.G., J.-L.M., H.J.D.) and Snyder Institute for Chronic Diseases (D.A.M.), Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada; Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo, Russian Federation (M.O., A.S., G.L.P.); Department of Cardiac Sciences and Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada (B.G.); and Comprehensive Heart Failure Center and Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany (B.G.)
| | - Sergei Yu Noskov
- Centre for Molecular Simulation, Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada (L.P., M.K., S.Y.N.); Libin Cardiovascular Institute of Alberta (J.G., J.-L.M., H.J.D.) and Snyder Institute for Chronic Diseases (D.A.M.), Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada; Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo, Russian Federation (M.O., A.S., G.L.P.); Department of Cardiac Sciences and Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada (B.G.); and Comprehensive Heart Failure Center and Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany (B.G.)
| | - Henry J Duff
- Centre for Molecular Simulation, Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada (L.P., M.K., S.Y.N.); Libin Cardiovascular Institute of Alberta (J.G., J.-L.M., H.J.D.) and Snyder Institute for Chronic Diseases (D.A.M.), Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada; Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo, Russian Federation (M.O., A.S., G.L.P.); Department of Cardiac Sciences and Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta, Canada (B.G.); and Comprehensive Heart Failure Center and Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany (B.G.)
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Panmanee W, Su S, Schurr MJ, Lau GW, Zhu X, Ren Z, McDaniel CT, Lu LJ, Ohman DE, Muruve DA, Panos RJ, Yu HD, Thompson TB, Tseng BS, Hassett DJ. The anti-sigma factor MucA of Pseudomonas aeruginosa: Dramatic differences of a mucA22 vs. a ΔmucA mutant in anaerobic acidified nitrite sensitivity of planktonic and biofilm bacteria in vitro and during chronic murine lung infection. PLoS One 2019; 14:e0216401. [PMID: 31158231 PMCID: PMC6546240 DOI: 10.1371/journal.pone.0216401] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 04/20/2019] [Indexed: 11/29/2022] Open
Abstract
Mucoid mucA22 Pseudomonas aeruginosa (PA) is an opportunistic lung pathogen of cystic fibrosis (CF) and chronic obstructive pulmonary disease (COPD) patients that is highly sensitive to acidified nitrite (A-NO2-). In this study, we first screened PA mutant strains for sensitivity or resistance to 20 mM A-NO2- under anaerobic conditions that represent the chronic stages of the aforementioned diseases. Mutants found to be sensitive to A-NO2- included PA0964 (pmpR, PQS biosynthesis), PA4455 (probable ABC transporter permease), katA (major catalase, KatA) and rhlR (quorum sensing regulator). In contrast, mutants lacking PA0450 (a putative phosphate transporter) and PA1505 (moaA2) were A-NO2- resistant. However, we were puzzled when we discovered that mucA22 mutant bacteria, a frequently isolated mucA allele in CF and to a lesser extent COPD, were more sensitive to A-NO2- than a truncated ΔmucA deletion (Δ157–194) mutant in planktonic and biofilm culture, as well as during a chronic murine lung infection. Subsequent transcriptional profiling of anaerobic, A-NO2--treated bacteria revealed restoration of near wild-type transcript levels of protective NO2- and nitric oxide (NO) reductase (nirS and norCB, respectively) in the ΔmucA mutant in contrast to extremely low levels in the A-NO2--sensitive mucA22 mutant. Proteins that were S-nitrosylated by NO derived from A-NO2- reduction in the sensitive mucA22 strain were those involved in anaerobic respiration (NirQ, NirS), pyruvate fermentation (UspK), global gene regulation (Vfr), the TCA cycle (succinate dehydrogenase, SdhB) and several double mutants were even more sensitive to A-NO2-. Bioinformatic-based data point to future studies designed to elucidate potential cellular binding partners for MucA and MucA22. Given that A-NO2- is a potentially viable treatment strategy to combat PA and other infections, this study offers novel developments as to how clinicians might better treat problematic PA infections in COPD and CF airway diseases.
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Affiliation(s)
- Warunya Panmanee
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine, Cincinnati, OH United States of America
| | - Shengchang Su
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine, Cincinnati, OH United States of America
| | - Michael J. Schurr
- Department of Immunology and Microbiology, University of Colorado School of Medicine, Aurora, CO United States of America
| | - Gee W. Lau
- College of Veterinary Medicine, University of Illinois at Urbana-Champaign, Urbana, IL United States of America
| | - Xiaoting Zhu
- Division of Biomedical Informatics, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH United States of America
| | - Zhaowei Ren
- Division of Biomedical Informatics, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH United States of America
| | - Cameron T. McDaniel
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine, Cincinnati, OH United States of America
| | - Long J. Lu
- Division of Biomedical Informatics, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH United States of America
| | - Dennis E. Ohman
- Department of Microbiology and Immunology, Virginia Commonwealth University Medical Center, Richmond, VA United States of America
- McGuire Veterans Affairs Medical Center, Richmond, VA United States of America
| | - Daniel A. Muruve
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Ralph J. Panos
- Department of Medicine, Cincinnati Veterans Affairs Medical Center, Cincinnati, OH United States of America
- Pulmonary, Critical Care, and Sleep Division, Department of Medicine, University of Cincinnati College of Medicine, Cincinnati, OH United States of America
| | - Hongwei D. Yu
- Department of Biochemistry and Microbiology, Marshall University, Huntington, WV United States of America
| | - Thomas B. Thompson
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine, Cincinnati, OH United States of America
| | - Boo Shan Tseng
- Department of Life Sciences, University of Nevada-Las Vegas, Las Vegas, NV United States of America
| | - Daniel J. Hassett
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine, Cincinnati, OH United States of America
- * E-mail:
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16
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Hudson G, Flannigan KL, Venu VKP, Alston L, Sandall CF, MacDonald JA, Muruve DA, Chang TKH, Mani S, Hirota SA. Pregnane X Receptor Activation Triggers Rapid ATP Release in Primed Macrophages That Mediates NLRP3 Inflammasome Activation. J Pharmacol Exp Ther 2019; 370:44-53. [PMID: 31004077 PMCID: PMC6542184 DOI: 10.1124/jpet.118.255679] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 04/08/2019] [Indexed: 12/15/2022] Open
Abstract
The pregnane X receptor (PXR) is a ligand-activated nuclear receptor that acts as a xenobiotic sensor, responding to compounds of foreign origin, including pharmaceutical compounds, environmental contaminants, and natural products, to induce transcriptional events that regulate drug detoxification and efflux pathways. As such, the PXR is thought to play a key role in protecting the host from xenobiotic exposure. More recently, the PXR has been reported to regulate the expression of innate immune receptors in the intestine and modulate inflammasome activation in the vasculature. In the current study, we report that activation of the PXR in primed macrophages triggers caspase-1 activation and interleukin-1β release. Mechanistically, we show that this response is nucleotide-binding oligomerization domain, leucine-rich repeat, and pyrin domain-containing 3-dependent and is driven by the rapid efflux of ATP and P2X purinoceptor 7 activation following PXR stimulation, an event that involves pannexin-1 gating, and is sensitive to inhibition of Src-family kinases. Our findings identify a mechanism whereby the PXR drives innate immune signaling, providing a potential link between xenobiotic exposure and the induction of innate inflammatory responses.
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Affiliation(s)
- Grace Hudson
- Departments of Physiology and Pharmacology (G.H., K.L.F., V.K.P.V., L.A., S.A.H.), Biochemistry and Molecular Biology (C.F.S., J.A.M.), Medicine (D.A.M.), and Immunology, Microbiology, and Infectious Diseases (S.A.H.), University of Calgary, Calgary, Alberta, Canada; Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, British Columbia, Canada (T.K.H.C.); and Department of Medicine, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Kyle L Flannigan
- Departments of Physiology and Pharmacology (G.H., K.L.F., V.K.P.V., L.A., S.A.H.), Biochemistry and Molecular Biology (C.F.S., J.A.M.), Medicine (D.A.M.), and Immunology, Microbiology, and Infectious Diseases (S.A.H.), University of Calgary, Calgary, Alberta, Canada; Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, British Columbia, Canada (T.K.H.C.); and Department of Medicine, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Vivek Krishna Pulakazhi Venu
- Departments of Physiology and Pharmacology (G.H., K.L.F., V.K.P.V., L.A., S.A.H.), Biochemistry and Molecular Biology (C.F.S., J.A.M.), Medicine (D.A.M.), and Immunology, Microbiology, and Infectious Diseases (S.A.H.), University of Calgary, Calgary, Alberta, Canada; Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, British Columbia, Canada (T.K.H.C.); and Department of Medicine, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Laurie Alston
- Departments of Physiology and Pharmacology (G.H., K.L.F., V.K.P.V., L.A., S.A.H.), Biochemistry and Molecular Biology (C.F.S., J.A.M.), Medicine (D.A.M.), and Immunology, Microbiology, and Infectious Diseases (S.A.H.), University of Calgary, Calgary, Alberta, Canada; Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, British Columbia, Canada (T.K.H.C.); and Department of Medicine, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Christina F Sandall
- Departments of Physiology and Pharmacology (G.H., K.L.F., V.K.P.V., L.A., S.A.H.), Biochemistry and Molecular Biology (C.F.S., J.A.M.), Medicine (D.A.M.), and Immunology, Microbiology, and Infectious Diseases (S.A.H.), University of Calgary, Calgary, Alberta, Canada; Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, British Columbia, Canada (T.K.H.C.); and Department of Medicine, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Justin A MacDonald
- Departments of Physiology and Pharmacology (G.H., K.L.F., V.K.P.V., L.A., S.A.H.), Biochemistry and Molecular Biology (C.F.S., J.A.M.), Medicine (D.A.M.), and Immunology, Microbiology, and Infectious Diseases (S.A.H.), University of Calgary, Calgary, Alberta, Canada; Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, British Columbia, Canada (T.K.H.C.); and Department of Medicine, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Daniel A Muruve
- Departments of Physiology and Pharmacology (G.H., K.L.F., V.K.P.V., L.A., S.A.H.), Biochemistry and Molecular Biology (C.F.S., J.A.M.), Medicine (D.A.M.), and Immunology, Microbiology, and Infectious Diseases (S.A.H.), University of Calgary, Calgary, Alberta, Canada; Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, British Columbia, Canada (T.K.H.C.); and Department of Medicine, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Thomas K H Chang
- Departments of Physiology and Pharmacology (G.H., K.L.F., V.K.P.V., L.A., S.A.H.), Biochemistry and Molecular Biology (C.F.S., J.A.M.), Medicine (D.A.M.), and Immunology, Microbiology, and Infectious Diseases (S.A.H.), University of Calgary, Calgary, Alberta, Canada; Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, British Columbia, Canada (T.K.H.C.); and Department of Medicine, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Sridhar Mani
- Departments of Physiology and Pharmacology (G.H., K.L.F., V.K.P.V., L.A., S.A.H.), Biochemistry and Molecular Biology (C.F.S., J.A.M.), Medicine (D.A.M.), and Immunology, Microbiology, and Infectious Diseases (S.A.H.), University of Calgary, Calgary, Alberta, Canada; Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, British Columbia, Canada (T.K.H.C.); and Department of Medicine, Albert Einstein College of Medicine, Bronx, New York (S.M.)
| | - Simon A Hirota
- Departments of Physiology and Pharmacology (G.H., K.L.F., V.K.P.V., L.A., S.A.H.), Biochemistry and Molecular Biology (C.F.S., J.A.M.), Medicine (D.A.M.), and Immunology, Microbiology, and Infectious Diseases (S.A.H.), University of Calgary, Calgary, Alberta, Canada; Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, British Columbia, Canada (T.K.H.C.); and Department of Medicine, Albert Einstein College of Medicine, Bronx, New York (S.M.)
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Platnich JM, Muruve DA. NOD-like receptors and inflammasomes: A review of their canonical and non-canonical signaling pathways. Arch Biochem Biophys 2019; 670:4-14. [PMID: 30772258 DOI: 10.1016/j.abb.2019.02.008] [Citation(s) in RCA: 217] [Impact Index Per Article: 43.4] [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: 12/05/2018] [Revised: 02/11/2019] [Accepted: 02/13/2019] [Indexed: 12/16/2022]
Abstract
The NOD-like receptor (NLR) family of proteins is a group of pattern recognition receptors (PRRs) known to mediate the initial innate immune response to cellular injury and stress. The NLRP proteins represent a fourteen-member subset of the NLR family that contains an N-terminal pyrin domain. Some NLRs are known to form multi-protein complexes known as inflammasomes. Inflammasomes consist of an NLR, the adaptor protein ASC, and the effector molecule pro-caspase-1. Once activated, these inflammasomes facilitate the cleavage and activation of caspase-1, which in turn mediates the cleavage of the pro-inflammatory cytokines IL-1β and IL-18 into their active and secreted forms. Activated caspase-1 also drives the cleavage of gasdermin D, which triggers an inflammatory form of cell death known as pyroptosis. Several NLRs are also known to possess non-canonical, inflammasome-independent functions, regulating a variety of signaling pathways. In this review, a thorough overview of both inflammasome-dependent and -independent NLR signaling will be presented, with highlights from the field as well as promising future directions and postulates based on the known science.
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Affiliation(s)
- Jaye M Platnich
- Department of Medicine, University of Calgary, Calgary, AB, Canada; Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - Daniel A Muruve
- Department of Medicine, University of Calgary, Calgary, AB, Canada; Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada.
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18
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Sporinova B, McRae SA, Muruve DA, Fritzler MJ, Nasr SH, Chin AC, Benediktsson H. A case of aggressive atypical anti-GBM disease complicated by CMV pneumonitis. BMC Nephrol 2019; 20:29. [PMID: 30704432 PMCID: PMC6357502 DOI: 10.1186/s12882-019-1227-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [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: 05/02/2018] [Accepted: 01/24/2019] [Indexed: 12/13/2022] Open
Abstract
Background Anti-glomerular basement membrane (anti-GBM) disease is characterized by circulating IgG glomerular basement membrane antibodies and is clinically expressed as a rapidly progressive crescentic glomerulonephritis (GN), with 30–60% of patients also developing pulmonary hemorrhage. Classically, the renal biopsy shows glomerular crescent formation, bright linear staining of glomerular basement membranes (GBM) for IgG on direct immunofluorescence (IF), and the serologic presence of circulating anti-GBM antibodies. Recently, patients with linear IgG IF staining, undetectable circulating anti-GBM antibodies and glomerular changes atypical for anti-GBM disease have been described as “atypical anti-GBM disease”, with a distinctly more benign clinical course than typical anti-GBM disease. We present a case report of a patient with negative anti-GBM serology but positive linear IgG staining by IF, severe diffuse crescentic and endocapillary proliferative glomerulonephritis, and renal failure, complicated by severe pulmonary hemorrhage after immunosuppression, likely due to cytomegalovirus (CMV) pneumonitis. Case presentation A 24-year-old man was admitted to hospital with hemoptysis and renal failure. Investigations for anti-GBM serology by addressable laser bead immunoassay (ALBIA) was negative for anti-GBM antibodies. Renal biopsy showed diffuse endocapillary proliferative glomerulonephritis with membranoproliferative features and diffuse circumferential crescents. Direct IF showed strong linear staining for IgG along GBMs. The patient’s hemoptysis improved with immunosuppression, but 1 month later he was readmitted with gross hemoptysis, which was refractory to further cyclophosphamide, plasma exchange and rituximab. Bronchoalveolar lavage (BAL) and blood work confirmed CMV pneumonitis, and the patient’s hemoptysis resolved with ganciclovir, though he became dialysis dependent. Conclusions This case demonstrates an atypical presentation of anti-GBM disease with both crescents and endocapillary hypercellularity and negative serology. The patient is dialysis dependent, unlike most previously described patients with atypical anti-GBM disease. The course was complicated by CMV pneumonitis, which contributed to the severity of the pulmonary manifestations and added diagnostic difficulty.
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Affiliation(s)
- Barbora Sporinova
- Internal Medicine Residency Program, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Susanna A McRae
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Daniel A Muruve
- Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Marvin J Fritzler
- Mitogen Advanced Diagnostics Laboratory, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Samih H Nasr
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - Alex C Chin
- Department of Pathology and Laboratory Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Hallgrimur Benediktsson
- Department of Pathology and Laboratory Medicine, Cumming School of Medicine, University of Calgary, Foothills Medical Center, 1403 29 St NW, Calgary, AB, T2N 2T9, Canada.
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19
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Cunningham A, Benediktsson H, Muruve DA, Hildebrand AM, Ravani P. Trends in Biopsy-Based Diagnosis of Kidney Disease: A Population Study. Can J Kidney Health Dis 2018; 5:2054358118799690. [PMID: 30263130 PMCID: PMC6149029 DOI: 10.1177/2054358118799690] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [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: 06/03/2018] [Accepted: 07/31/2018] [Indexed: 11/17/2022] Open
Abstract
Background Kidney biopsy is considered the gold standard for diagnosis of renal disease. It is increasingly performed in cases of diagnostic uncertainty, including in patients with coexistent diabetes and hypertension, for which a presumptive clinical diagnosis can be made. Little is known about the incidence and distribution of biopsy-proven kidney diseases. Changes in the distribution of biopsy diagnoses over time may have significant implications for resource allocation and future research. Objective We studied the relative frequency of kidney diseases in Southern Alberta over the past 30 years, to determine whether the population-standardized annual biopsy rate and incidence of selected diagnostic categories have changed. We hypothesized an increasing incidence of renal biopsies and a growing proportion of nonglomerular diseases (eg, tubulointerstitial disorders) likely due to evolving indications for biopsy. Given the rise in obesity, diabetes, and aging population with chronic kidney disease (CKD), we anticipated a rise in nephroangiosclerosis and diabetic nephropathy over time. Design Retrospective population-based cohort study using the Biobank for the Molecular Classification of Kidney Disease (BMCKD). Setting Southern Alberta, Canada. Patients All patients who underwent renal biopsy between 1985 and 2015 in our database. Measurements We used descriptive and quantitative analysis to characterize demographics and biopsy-based diagnoses. Methods We conducted a retrospective population-based cohort study to analyze all consecutive patients who underwent at least one kidney biopsy over a 30-year period in Southern Alberta (1985-2015). We considered the first adequate biopsy. We described the annual standardized incidence of biopsy-proven kidney diseases over time and summarized associated patient characteristics. We assumed a Poisson distribution for biopsy counts and used provincial demographic information to standardize rates. Results During the study period, 6434 people (58% male; mean age: 47.9 years) underwent a kidney biopsy. The population-standardized annual biopsy rate increased from 10.8 biopsies per 100 000 person-years in the first 5 years of the study (1985-1989) to 18.2 biopsies per 100 000 person-years in the last 5 years (2010-2014). The mean age at the time of biopsy increased from 42.5 years (1985-1989) to 51.4 years (2010-2014). Glomerular diseases remained the most prevalent histopathological group, with a growing representation of diabetic kidney disease from 3.69% to 16.18%, and a relative decrease in the proportion of other glomerular diseases from 72.32% to 62.92% of glomerular diagnoses. Tubulointerstitial diseases increased from 5.87% to 7.36% of total diagnoses. Limitations Classification schemes have changed over time, so recently recognized conditions may have been misclassified in earlier data. There was a changing group of pathologists and nephrologists over this period. Variations in interpretation and application of biopsy indications by physician may influence recorded prevalence of certain diagnoses. We do not yet have complete information on indications or patient outcomes linked to the database. Conclusions In Southern Alberta, kidney biopsy is being utilized more frequently and in older people. Diabetic nephropathy is increasingly diagnosed, which may reflect either or both changes in the prevalence of causative factors and local biopsy practices.
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Affiliation(s)
| | | | | | | | - Pietro Ravani
- Department of Medicine, University of Calgary, AB, Canada
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Ulke-Lemée A, Lau A, Nelson MC, James MT, Muruve DA, MacDonald JA. Quantification of Inflammasome Adaptor Protein ASC in Biological Samples by Multiple-Reaction Monitoring Mass Spectrometry. Inflammation 2018; 41:1396-1408. [DOI: 10.1007/s10753-018-0787-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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21
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Lau A, Chung H, Komada T, Platnich JM, Sandall CF, Choudhury SR, Chun J, Naumenko V, Surewaard BG, Nelson MC, Ulke-Lemée A, Beck PL, Benediktsson H, Jevnikar AM, Snelgrove SL, Hickey MJ, Senger DL, James MT, Macdonald JA, Kubes P, Jenne CN, Muruve DA. Renal immune surveillance and dipeptidase-1 contribute to contrast-induced acute kidney injury. J Clin Invest 2018; 128:2894-2913. [PMID: 29863495 DOI: 10.1172/jci96640] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [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: 08/01/2017] [Accepted: 04/10/2018] [Indexed: 01/04/2023] Open
Abstract
Radiographic contrast agents cause acute kidney injury (AKI), yet the underlying pathogenesis is poorly understood. Nod-like receptor pyrin containing 3-deficient (Nlrp3-deficient) mice displayed reduced epithelial cell injury and inflammation in the kidney in a model of contrast-induced AKI (CI-AKI). Unexpectedly, contrast agents directly induced tubular epithelial cell death in vitro that was not dependent on Nlrp3. Rather, contrast agents activated the canonical Nlrp3 inflammasome in macrophages. Intravital microscopy revealed diatrizoate (DTA) uptake within minutes in perivascular CX3CR1+ resident phagocytes in the kidney. Following rapid filtration into the tubular luminal space, DTA was reabsorbed and concentrated in tubular epithelial cells via the brush border enzyme dipeptidase-1 in volume-depleted but not euvolemic mice. LysM-GFP+ macrophages recruited to the kidney interstitial space ingested contrast material transported from the urine via direct interactions with tubules. CI-AKI was dependent on resident renal phagocytes, IL-1, leukocyte recruitment, and dipeptidase-1. Levels of the inflammasome-related urinary biomarkers IL-18 and caspase-1 were increased immediately following contrast administration in patients undergoing coronary angiography, consistent with the acute renal effects observed in mice. Taken together, these data show that CI-AKI is a multistep process that involves immune surveillance by resident and infiltrating renal phagocytes, Nlrp3-dependent inflammation, and the tubular reabsorption of contrast via dipeptidase-1.
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Affiliation(s)
- Arthur Lau
- Department of Medicine.,Snyder Institute for Chronic Diseases
| | - Hyunjae Chung
- Department of Medicine.,Snyder Institute for Chronic Diseases
| | - Takanori Komada
- Department of Medicine.,Snyder Institute for Chronic Diseases
| | - Jaye M Platnich
- Department of Medicine.,Snyder Institute for Chronic Diseases
| | - Christina F Sandall
- Department of Biochemistry and Molecular Biology.,Libin Cardiovascular Institute of Alberta
| | | | - Justin Chun
- Department of Medicine.,Snyder Institute for Chronic Diseases
| | - Victor Naumenko
- Snyder Institute for Chronic Diseases.,Department of Microbiology, Immunology, and Infectious Diseases, and
| | - Bas Gj Surewaard
- Snyder Institute for Chronic Diseases.,Department of Microbiology, Immunology, and Infectious Diseases, and
| | | | - Annegret Ulke-Lemée
- Department of Biochemistry and Molecular Biology.,Libin Cardiovascular Institute of Alberta
| | - Paul L Beck
- Department of Medicine.,Snyder Institute for Chronic Diseases
| | - Hallgrimur Benediktsson
- Snyder Institute for Chronic Diseases.,Department of Pathology and Laboratory Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Anthony M Jevnikar
- Department of Medicine, University of Western Ontario, London, Ontario, Canada
| | - Sarah L Snelgrove
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Clayton, Victoria, Australia
| | - Michael J Hickey
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Clayton, Victoria, Australia
| | - Donna L Senger
- Department of Oncology.,Arnie Charbonneau Cancer Institute
| | - Matthew T James
- Department of Medicine.,Libin Cardiovascular Institute of Alberta
| | - Justin A Macdonald
- Department of Biochemistry and Molecular Biology.,Libin Cardiovascular Institute of Alberta
| | - Paul Kubes
- Snyder Institute for Chronic Diseases.,Department of Microbiology, Immunology, and Infectious Diseases, and
| | - Craig N Jenne
- Snyder Institute for Chronic Diseases.,Department of Microbiology, Immunology, and Infectious Diseases, and
| | - Daniel A Muruve
- Department of Medicine.,Snyder Institute for Chronic Diseases
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22
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Komada T, Chung H, Lau A, Platnich JM, Beck PL, Benediktsson H, Duff HJ, Jenne CN, Muruve DA. Macrophage Uptake of Necrotic Cell DNA Activates the AIM2 Inflammasome to Regulate a Proinflammatory Phenotype in CKD. J Am Soc Nephrol 2018; 29:1165-1181. [PMID: 29439156 DOI: 10.1681/asn.2017080863] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [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: 08/09/2017] [Accepted: 12/19/2017] [Indexed: 11/03/2022] Open
Abstract
Nonmicrobial inflammation contributes to CKD progression and fibrosis. Absent in melanoma 2 (AIM2) is an inflammasome-forming receptor for double-stranded DNA. AIM2 is expressed in the kidney and activated mainly by macrophages. We investigated the potential pathogenic role of the AIM2 inflammasome in kidney disease. In kidneys from patients with diabetic or nondiabetic CKD, immunofluorescence showed AIM2 expression in glomeruli, tubules, and infiltrating leukocytes. In a mouse model of unilateral ureteral obstruction (UUO), Aim2 deficiency attenuated the renal injury, fibrosis, and inflammation observed in wild-type (WT) littermates. In bone marrow chimera studies, UUO induced substantially more tubular injury and IL-1β cleavage in Aim2-/- or WT mice that received WT bone marrow than in WT mice that received Aim2-/- bone marrow. Intravital microscopy of the kidney in LysM(gfp/gfp) mice 5-6 days after UUO demonstrated the significant recruitment of GFP+ proinflammatory macrophages that crawled along injured tubules, engulfed DNA from necrotic cells, and expressed active caspase-1. DNA uptake occurred in large vacuolar structures within recruited macrophages but not resident CX3CR1+ renal phagocytes. In vitro, macrophages that engulfed necrotic debris showed AIM2-dependent activation of caspase-1 and IL-1β, as well as the formation of AIM2+ ASC specks. ASC specks are a hallmark of inflammasome activation. Cotreatment with DNaseI attenuated the increase in IL-1β levels, confirming that DNA was the principal damage-associated molecular pattern in this process. Therefore, the activation of the AIM2 inflammasome by DNA from necrotic cells drives a proinflammatory phenotype that contributes to chronic injury in the kidney.
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Affiliation(s)
- Takanori Komada
- Departments of Medicine.,Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Hyunjae Chung
- Departments of Medicine.,Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Arthur Lau
- Departments of Medicine.,Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Jaye M Platnich
- Departments of Medicine.,Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Paul L Beck
- Departments of Medicine.,Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Hallgrimur Benediktsson
- Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada.,Pathology and Laboratory Medicine
| | | | - Craig N Jenne
- Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada.,Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, Alberta, Canada; and
| | - Daniel A Muruve
- Departments of Medicine, .,Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
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23
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Lemire P, Robertson SJ, Maughan H, Tattoli I, Streutker CJ, Platnich JM, Muruve DA, Philpott DJ, Girardin SE. The NLR Protein NLRP6 Does Not Impact Gut Microbiota Composition. Cell Rep 2017; 21:3653-3661. [DOI: 10.1016/j.celrep.2017.12.026] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 10/17/2017] [Accepted: 12/06/2017] [Indexed: 01/17/2023] Open
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24
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Muruve DA, Mann MC, Chapman K, Wong JF, Ravani P, Page SA, Benediktsson H. The biobank for the molecular classification of kidney disease: research translation and precision medicine in nephrology. BMC Nephrol 2017; 18:252. [PMID: 28747168 PMCID: PMC5530477 DOI: 10.1186/s12882-017-0669-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [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] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Accepted: 07/18/2017] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Advances in technology and the ability to interrogate disease pathogenesis using systems biology approaches are exploding. As exemplified by the substantial progress in the personalized diagnosis and treatment of cancer, the application of systems biology to enable precision medicine in other disciplines such as Nephrology is well underway. Infrastructure that permits the integration of clinical data, patient biospecimens and advanced technologies is required for institutions to contribute to, and benefit from research in molecular disease classification and to devise specific and patient-oriented treatments. METHODS AND RESULTS We describe the establishment of the Biobank for the Molecular Classification of Kidney Disease (BMCKD) at the University of Calgary, Alberta, Canada. The BMCKD consists of a fully equipped wet laboratory, an information technology infrastructure, and a formal operational, ethical and legal framework for banking human biospecimens and storing clinical data. The BMCKD first consolidated a large retrospective cohort of kidney biopsy specimens to create a population-based renal pathology database and tissue inventory of glomerular and other kidney diseases. The BMCKD will continue to prospectively bank all kidney biopsies performed in Southern Alberta. The BMCKD is equipped to perform molecular, clinical and epidemiologic studies in renal pathology. The BMCKD also developed formal biobanking procedures for human specimens such as blood, urine and nucleic acids collected for basic and clinical research studies or for advanced diagnostic technologies in clinical care. The BMCKD is guided by standard operating procedures, an ethics framework and legal agreements with stakeholders that include researchers, data custodians and patients. The design and structure of the BMCKD permits its inclusion in a wide variety of research and clinical activities. CONCLUSION The BMCKD is a core multidisciplinary facility that will bridge basic and clinical research and integrate precision medicine into renal pathology and nephrology.
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Affiliation(s)
- Daniel A. Muruve
- Department of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, 3280 Hospital Dr. NW, Calgary, AB T2N 4N1 Canada
| | - Michelle C. Mann
- Department of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, 3280 Hospital Dr. NW, Calgary, AB T2N 4N1 Canada
| | - Kevin Chapman
- Department of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, 3280 Hospital Dr. NW, Calgary, AB T2N 4N1 Canada
| | - Josee F. Wong
- Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB Canada
| | - Pietro Ravani
- Department of Medicine, Libin Cardiovascular Institute, University of Calgary, Calgary, AB Canada
| | - Stacey A. Page
- Department of Community Health Sciences, University of Calgary, Calgary, AB Canada
| | - Hallgrimur Benediktsson
- Department of Pathology and Laboratory Medicine, University of Calgary and Calgary Laboratory Services, Calgary, AB Canada
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25
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Pialoux V, Poulin MJ, Hemmelgarn BR, Muruve DA, Chirico EN, Faes C, Sola DY, Ahmed SB. Cyclooxygenase-2 Inhibition Limits Angiotensin II-Induced DNA Oxidation and Protein Nitration in Humans. Front Physiol 2017; 8:138. [PMID: 28344559 PMCID: PMC5344903 DOI: 10.3389/fphys.2017.00138] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [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: 11/03/2016] [Accepted: 02/23/2017] [Indexed: 01/03/2023] Open
Abstract
Compared to other cyclooxygenase-2 inhibitors, celecoxib is associated with a lower cardiovascular risk, though the mechanism remains unclear. Angiotensin II is an important mediator of oxidative stress in the pathophysiology of vascular disease. Cyclooxygenase-2 may modify the effects of angiotensin II though this has never been studied in humans. The purpose of the study was to test the effects of selective cyclooxygenase-2 inhibition on plasma measures of oxidative stress, the vasoconstrictor endothelin-1, and nitric oxide metabolites, both at baseline and in respose to Angiotensin II challenge in healthy humans. Measures of 8-hydroxydeoxyguanosine, advanced oxidation protein products, nitrotyrosine, endothelin-1, and nitric oxide metabolites were assessed from plasma samples drawn at baseline and in response to graded angiotensin II infusion (3 ng/kg/min × 30 min, 6 ng/kg/min × 30 min) before and after 14 days of cyclooxygenase-2 inhibition in 14 healthy subjects (eight male, six female) in high salt balance, a state of maximal renin angiotensin system suppression. Angiotensin II infusion significantly increased plasma oxidative stress compared to baseline (8-hydroxydeoxyguanosine; +17%; advanced oxidation protein products; +16%), nitrotyrosine (+76%). Furthermore, levels of endothelin-1 levels were significantly increased (+115%) and nitric oxide metabolites were significantly decreased (−20%). Cycloxygenase-2 inhibition significantly limited the increase in 8-hydroxydeoxyguanosine, nitrotyrosine and the decrease in nitric oxide metabolites induced by angiotensin II infusion, though no changes in advanced oxidation protein products and endothelin-1 concentrations were observed. Cyclooxygenase-2 inhibition with celecoxib partially limited the angiotensin II-mediated increases in markers of oxidative stress in humans, offering a potential physiological pathway for the improved cardiovascular risk profile of this drug.
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Affiliation(s)
- Vincent Pialoux
- Laboratoire Interuniversitaire de Biologie de la Motricité EA7424, Université de Lyon, Université Claude Bernard Lyon 1 Villeurbanne, France
| | - Marc J Poulin
- Faculty of Medicine, Hotchkiss Brain Institute, University of CalgaryCalgary, AB, Canada; Department of Physiology and Pharmacology, Faculty of Medicine, University of CalgaryCalgary, AB, Canada; Faculty of Medicine, Libin Cardiovascular Institute of Alberta, University of CalgaryCalgary, AB, Canada; Department of Clinical Neurosciences, Cumming School of Medicine, University of CalgaryCalgary, AB, Canada; Faculty of Kinesiology, University of CalgaryCalgary, AB, Canada
| | - Brenda R Hemmelgarn
- Faculty of Medicine, Libin Cardiovascular Institute of Alberta, University of CalgaryCalgary, AB, Canada; Department of Medicine, Faculty of Medicine, University of CalgaryCalgary, AB, Canada
| | - Daniel A Muruve
- Department of Medicine, Faculty of Medicine, University of Calgary Calgary, AB, Canada
| | - Erica N Chirico
- Laboratoire Interuniversitaire de Biologie de la Motricité EA7424, Université de Lyon, Université Claude Bernard Lyon 1Villeurbanne, France; Department of Biomedical Sciences, Cooper Medical School of Rowan UniversityCamden, NJ, USA
| | - Camille Faes
- Laboratoire Interuniversitaire de Biologie de la Motricité EA7424, Université de Lyon, Université Claude Bernard Lyon 1 Villeurbanne, France
| | - Darlene Y Sola
- Faculty of Medicine, Libin Cardiovascular Institute of Alberta, University of CalgaryCalgary, AB, Canada; Department of Medicine, Faculty of Medicine, University of CalgaryCalgary, AB, Canada
| | - Sofia B Ahmed
- Faculty of Medicine, Libin Cardiovascular Institute of Alberta, University of CalgaryCalgary, AB, Canada; Department of Medicine, Faculty of Medicine, University of CalgaryCalgary, AB, Canada
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26
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Muruve NG, Cheng YF, Feng Y, Liu T, Muruve DA, Hassett DJ, Irvin RT. Peptide-based biocoatings for corrosion protection of stainless steel biomaterial in a chloride solution. Materials Science and Engineering: C 2016; 68:695-700. [DOI: 10.1016/j.msec.2016.06.053] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 05/20/2016] [Accepted: 06/14/2016] [Indexed: 11/16/2022]
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27
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Page SA, Manhas KP, Muruve DA. A survey of patient perspectives on the research use of health information and biospecimens. BMC Med Ethics 2016; 17:48. [PMID: 27527514 PMCID: PMC4986353 DOI: 10.1186/s12910-016-0130-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 07/28/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Personal health information and biospecimens are valuable research resources essential for the advancement of medicine and protected by national standards and provincial statutes. Research ethics and privacy standards attempt to balance individual interests with societal interests. However these standards may not reflect public opinion or preferences. The purpose of this study was to assess the opinions and preferences of patients with kidney disease about the use of their health information and biospecimens for medical research. METHODS A 45-item survey was distributed to a convenience sample of patients at an outpatient clinic in a large urban centre. The survey briefly addressed sociodemographic and illness characteristics. Opinions were sought on the research use of health information and biospecimens including consent preferences. RESULTS Two hundred eleven of 400 distributed surveys were completed (response rate 52.8 %). Respondents were generally supportive of medical research and trusting of researchers. Many respondents supported the use of their information and biospecimens for health research and also preferred consent be sought for use of health information and biospecimens. Some supported the use of their information and biospecimens for research without consent. There were significant differences in the opinions people offered regarding the research use of biospecimens compared to health information. Some respondent perspectives about consent were at odds with current regulatory and legal standards. CONCLUSIONS Clinical health data and biospecimens are valuable research resources, critical to the advancement of medicine. Use of these data for research requires balancing respect for individual autonomy, privacy and the societal interest in the greater good. Incongruence between some respondent perspectives and the regulatory standards suggest both a need for public education and review of legislation to increase understanding and ensure the public's trust is maintained.
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Affiliation(s)
- Stacey A Page
- Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, TRW Building, 3rd Floor, 3280 Hospital Drive NW, Calgary, AB, T2N 4Z6, Canada. .,Conjoint Health Research Ethics Board, Research Services, University of Calgary, MacKimmie Library Tower, 3rd Floor, 2500 University Drive NW, Calgary, AB, T2N 1N4, Canada.
| | - Kiran Pohar Manhas
- Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, TRW Building, 3rd Floor, 3280 Hospital Drive NW, Calgary, AB, T2N 4Z6, Canada.,Alberta Centre for Child, Family & Community Research, Child Development Centre, 2888 Shaganappi Trail NW, Calgary, AB, T3B-6A8, Canada
| | - Daniel A Muruve
- Department of Medicine, Division of Nephrology and Hypertension, Snyder Institute for Chronic Diseases, University of Calgary, 3280 Hospital Dr. NW, Calgary, AB, T2N 4Z6, Canada
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28
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Beck PL, Cotton JA, Platnich JM, Muruve DA, Buret AG, Jijon H. Interleukin-8 in gastrointestinal inflammation and malignancy: induction and clinical consequences. ACTA ACUST UNITED AC 2016. [DOI: 10.2147/ijicmr.s63682] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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29
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Chun J, Chung H, Wang X, Barry R, Taheri ZM, Platnich JM, Ahmed SB, Trpkov K, Hemmelgarn B, Benediktsson H, James MT, Muruve DA. NLRP3 Localizes to the Tubular Epithelium in Human Kidney and Correlates With Outcome in IgA Nephropathy. Sci Rep 2016; 6:24667. [PMID: 27093923 PMCID: PMC4837396 DOI: 10.1038/srep24667] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [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: 11/17/2015] [Accepted: 04/01/2016] [Indexed: 01/03/2023] Open
Abstract
Nod-like receptor pyrin domain-containing-3 (NLRP3) has been implicated in the pathogenesis of experimental renal injury, yet its characterization in human kidney disease remains largely unexplored. NLRP3 expression was evaluated in human kidney biopsies, primary renal tubular cells (HPTC) and correlated to disease outcomes in patients with IgA nephropathy (IgAN). NLRP3 localized to renal tubules in normal human kidney tissue and to mitochondria within HPTC by immunohistochemistry and immunofluorescence microscopy. Compared to control kidneys, NLRP3 gene expression was increased in biopsies of patients with IgAN. While NLRP3 expression in IgAN was detected in glomeruli, it remained largely confined to the tubular epithelial compartment. In vitro NLRP3 mRNA and protein expression were transiently induced in HPTC by TGF-β1 but subsequently diminished over time as cells lost their epithelial phenotype in a process regulated by transcription and ubiquitin-mediated degradation. Consistent with the in vitro data, low NLRP3 mRNA expression in kidney biopsies was associated with a linear trend of higher risk of composite endpoint of doubling serum creatinine and end stage renal disease in patients with IgAN. Taken together, these data show that NLRP3 is primarily a kidney tubule-expressed protein that decreases in abundance in progressive IgAN.
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Affiliation(s)
- Justin Chun
- Department of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Hyunjae Chung
- Department of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Xiangyu Wang
- Department of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Rebecca Barry
- Department of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Zohreh Mohammad Taheri
- Department of Pathology and Laboratory Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Jaye M Platnich
- Department of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Sofia B Ahmed
- Department of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Kiril Trpkov
- Department of Pathology and Laboratory Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Brenda Hemmelgarn
- Department of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Hallgrimur Benediktsson
- Department of Pathology and Laboratory Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Matthew T James
- Department of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Daniel A Muruve
- Department of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
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30
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McDaniel C, Su S, Panmanee W, Lau GW, Browne T, Cox K, Paul AT, Ko SHB, Mortensen JE, Lam JS, Muruve DA, Hassett DJ. A Putative ABC Transporter Permease Is Necessary for Resistance to Acidified Nitrite and EDTA in Pseudomonas aeruginosa under Aerobic and Anaerobic Planktonic and Biofilm Conditions. Front Microbiol 2016; 7:291. [PMID: 27064218 PMCID: PMC4817314 DOI: 10.3389/fmicb.2016.00291] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [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: 12/07/2015] [Accepted: 02/23/2016] [Indexed: 11/18/2022] Open
Abstract
Pseudomonas aeruginosa (PA) is an important airway pathogen of cystic fibrosis and chronic obstructive disease patients. Multiply drug resistant PA is becoming increasing prevalent and new strategies are needed to combat such insidious organisms. We have previously shown that a mucoid, mucA22 mutant PA is exquisitely sensitive to acidified nitrite (A-NO2−, pH 6.5) at concentrations that are well tolerated in humans. Here, we used a transposon mutagenesis approach to identify PA mutants that are hypersensitive to A-NO2−. Among greater than 10,000 mutants screened, we focused on PA4455, in which the transposon was found to disrupt the production of a putative cytoplasmic membrane-spanning ABC transporter permease. The PA4455 mutant was not only highly sensitive to A-NO2−, but also the membrane perturbing agent, EDTA and the antibiotics doxycycline, tigecycline, colistin, and chloramphenicol, respectively. Treatment of bacteria with A-NO2− plus EDTA, however, had the most dramatic and synergistic effect, with virtually all bacteria killed by 10 mM A-NO2−, and EDTA (1 mM, aerobic, anaerobic). Most importantly, the PA4455 mutant was also sensitive to A-NO2− in biofilms. A-NO2− sensitivity and an anaerobic growth defect was also noted in two mutants (rmlC and wbpM) that are defective in B-band LPS synthesis, potentially indicating a membrane defect in the PA4455 mutant. Finally, this study describes a gene, PA4455, that when mutated, allows for dramatic sensitivity to the potential therapeutic agent, A-NO2− as well as EDTA. Furthermore, the synergy between the two compounds could offer future benefits against antibiotic resistant PA strains.
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Affiliation(s)
- Cameron McDaniel
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine Cincinnati, OH, USA
| | - Shengchang Su
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine Cincinnati, OH, USA
| | - Warunya Panmanee
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine Cincinnati, OH, USA
| | - Gee W Lau
- College of Veterinary Medicine, University of Illinois at Urbana-Champaign Urbana, IL, USA
| | - Tristan Browne
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine Cincinnati, OH, USA
| | - Kevin Cox
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine Cincinnati, OH, USA
| | - Andrew T Paul
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine Cincinnati, OH, USA
| | - Seung-Hyun B Ko
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of Medicine Cincinnati, OH, USA
| | - Joel E Mortensen
- Diagnostic and Infectious Diseases Testing Laboratory, Cincinnati Children's Hospital Medical Center Cincinnati, OH, USA
| | - Joseph S Lam
- Department of Molecular and Cellular Biology, University of Guelph Guelph, ON, Canada
| | - Daniel A Muruve
- Department of Medicine, University of Calgary Calgary, AB, Canada
| | - Daniel J Hassett
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati College of MedicineCincinnati, OH, USA; Department of Research Services, Cincinnati Veteran's Association Medical CenterCincinnati, OH, USA
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31
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Chung H, Vilaysane A, Lau A, Stahl M, Morampudi V, Bondzi-Simpson A, Platnich JM, Bracey NA, French MC, Beck PL, Chun J, Vallance BA, Muruve DA. NLRP3 regulates a non-canonical platform for caspase-8 activation during epithelial cell apoptosis. Cell Death Differ 2016; 23:1331-46. [PMID: 26891693 DOI: 10.1038/cdd.2016.14] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 12/30/2015] [Accepted: 01/20/2016] [Indexed: 12/31/2022] Open
Abstract
Nod-like receptor, pyrin containing 3 (NLRP3) is characterized primarily as a canonical caspase-1 activating inflammasome in macrophages. NLRP3 is also expressed in the epithelium of the kidney and gut; however, its function remains largely undefined. Primary mouse tubular epithelial cells (TEC) lacking Nlrp3 displayed reduced apoptosis downstream of the tumor necrosis factor (TNF) receptor and CD95. TECs were identified as type II apoptotic cells that activated caspase-8, tBid and mitochondrial apoptosis via caspase-9, responses that were reduced in Nlrp3-/- cells. The activation of caspase-8 during extrinsic apoptosis induced by TNFα/cycloheximide (TNFα/CHX) was dependent on adaptor protein apoptosis-associated speck-like protein containing a CARD (ASC) and completely independent of caspase-1 or caspase-11. TECs and primary human proximal tubular epithelial cells (HPTC) did not activate a canonical inflammasome, caspase-1, or IL-1β secretion in response to TNFα/CHX or NLRP3-dependent triggers, such as ATP or nigericin. In cell fractionation studies and by confocal microscopy, NLRP3 colocalized with ASC and caspase-8 in speck-like complexes at the mitochondria during apoptosis. The formation of NLRP3/ASC/caspase-8 specks in response to TNFα/CHX was downstream of TNFR signaling and dependent on potassium efflux. Epithelial ASC specks were present in enteroids undergoing apoptosis and in the injured tubules of wild-type but not Nlrp3-/- or ASC-/- mice following ureteric unilateral obstruction in vivo. These data show that NLRP3 and ASC form a conserved non-canonical platform for caspase-8 activation, independent of the inflammasome that regulates apoptosis within epithelial cells.
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Affiliation(s)
- H Chung
- Department of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - A Vilaysane
- Department of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - A Lau
- Department of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - M Stahl
- Department of Pediatrics, Child and Family Research Institute, University of British Columbia, Vancouver, BC, Canada
| | - V Morampudi
- Department of Pediatrics, Child and Family Research Institute, University of British Columbia, Vancouver, BC, Canada
| | - A Bondzi-Simpson
- Department of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - J M Platnich
- Department of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - N A Bracey
- Department of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - M-C French
- Department of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - P L Beck
- Department of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - J Chun
- Department of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - B A Vallance
- Department of Pediatrics, Child and Family Research Institute, University of British Columbia, Vancouver, BC, Canada
| | - D A Muruve
- Department of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
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32
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Tulk SE, Liao KC, Muruve DA, Li Y, Beck PL, MacDonald JA. Vitamin D₃ metabolites enhance the NLRP3-dependent secretion of IL-1β from human THP-1 monocytic cells. J Cell Biochem 2015; 116:711-20. [PMID: 25639477 DOI: 10.1002/jcb.24985] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [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: 05/20/2014] [Accepted: 09/22/2014] [Indexed: 01/18/2023]
Abstract
Vitamin D3 has emerged as an important regulator of the immune system. With metabolic enzymes for vitamin D3 activation and vitamin D receptors (VDR) now identified in a variety of immune cells, the active vitamin D3 metabolite 1,25(OH)2D3, is thought to possess immunomodulatory properties. We examined whether 1,25(OH)2D3 might also enhance the NLRP3-dependent release of mature IL-1β from macrophages. PMA-differentiated THP-1 cells were stimulated with vitamin D3 metabolites and assessed for CYP27, CYP24, NLRP3, ASC, pro-caspase-1 expression by western blot and real-time qPCR as well as inflammasome activation with pro-inflammatory cytokine IL-1β release measured by ELISA. Exposure to 1,25(OH)2D3 had no effect on the basal expression levels of VDR; however, CYP27A1 transcript was suppressed and CYP24A1 transcript was substantively elevated. Both 1,25(OH)2D3 - and 25(OH)D3 induced IL-1β release from THP-1 cells, and these effects were blocked with application of the caspase-1 inhibitor YVAD and the NLRP3 inhibitors glyburide and Bay 11-7082. Interestingly, 1,25 (OH)2D3 exposure reduced NLRP3 protein expression but had no effect on ASC or pro-caspase-1 protein levels. The increase in mature IL-1β elicited by 1,25(OH)2D3 was modest compared to that found for ATP or C. difficile toxins. However, co-treatment of THP-1 cells with ATP and 1,25(OH)2D3 resulted in more IL-1β secretion than ATP or 1,25(OH)2D3 alone.
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Affiliation(s)
- Sarah E Tulk
- Department of Biochemistry & Molecular Biology, University of Calgary, 3280, Hospital Drive, NW, Calgary, AB, T2N 4Z6, Canada
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Abstract
SIGNIFICANCE Persistent nonmicrobial tissue injury leads to the nonlinear activation of integrated wound-healing pathways. In chronic cardiovascular diseases, local tissue undergoes dynamic remodeling involving both structural cells and professional innate immune cells in attempts to limit burden of injury. While the final effector mechanisms by which these different cellular populations participate in wound healing are functionally distinct, their upstream molecular signaling pathways can often be shared. RECENT ADVANCES The NOD-like receptors (NLRs) are intracellular pattern recognition receptors that have been well characterized as key regulators of pro-inflammatory cytokine production in innate immune cells. However, recent evidence has shown that some NLR proteins are additionally expressed by resident structural cells despite negligible cytokine production. These results indicate the potential for noncanonical routes of innate immune signaling by NLRs within solid organ systems. CRITICAL ISSUES Here, we review the emerging functions of NLR proteins in professional immune and tissue-resident cells, and discuss the implications in wound healing during chronic cardiovascular diseases. Emphasis is placed on NLRP3 and its regulation of cardiac structure and function in response to injury. Specific cellular and subcellular signaling paradigms are also discussed. FUTURE DIRECTIONS The characterization of how NLRs participate in homeostasis during cellular injury is essential to develop their potential utility for therapeutic intervention in cardiovascular disease.
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Affiliation(s)
- Nathan A Bracey
- 1 Department of Medicine, Snyder Institute for Chronic Diseases , University of Calgary, Calgary, Canada
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Bracey NA, Gershkovich B, Chun J, Vilaysane A, Meijndert HC, Wright JR, Fedak PW, Beck PL, Muruve DA, Duff HJ. Mitochondrial NLRP3 protein induces reactive oxygen species to promote Smad protein signaling and fibrosis independent from the inflammasome. J Biol Chem 2014; 289:19571-84. [PMID: 24841199 DOI: 10.1074/jbc.m114.550624] [Citation(s) in RCA: 116] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Nucleotide-binding domain and leucine-rich repeat containing PYD-3 (NLRP3) is a pattern recognition receptor that is implicated in the pathogenesis of inflammation and chronic diseases. Although much is known regarding the NLRP3 inflammasome that regulates proinflammatory cytokine production in innate immune cells, the role of NLRP3 in non-professional immune cells is unclear. Here we report that NLRP3 is expressed in cardiac fibroblasts and increased during TGFβ stimulation. NLRP3-deficient cardiac fibroblasts displayed impaired differentiation and R-Smad activation in response to TGFβ. Only the central nucleotide binding domain of NLRP3 was required to augment R-Smad signaling because the N-terminal Pyrin or C-terminal leucine-rich repeat domains were dispensable. Interestingly, NLRP3 regulation of myofibroblast differentiation proceeded independently from the inflammasome, IL-1β/IL-18, or caspase 1. Instead, mitochondrially localized NLRP3 potentiated reactive oxygen species to augment R-Smad activation. In vivo, NLRP3-deficient mice were protected against angiotensin II-induced cardiac fibrosis with preserved cardiac architecture and reduced collagen 1. Together, these results support a distinct role for NLRP3 in non-professional immune cells independent from the inflammasome to regulate differential aspects of wound healing and chronic disease.
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Affiliation(s)
| | | | | | | | | | - James R Wright
- Department of Pathology and Laboratory Medicine, The University of Calgary, Calgary, Alberta T2N 4N1, Canada
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MacDonald JA, Wijekoon CP, Liao KC, Muruve DA. Biochemical and structural aspects of the ATP-binding domain in inflammasome-forming human NLRP proteins. IUBMB Life 2014; 65:851-62. [PMID: 24078393 DOI: 10.1002/iub.1210] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Accepted: 08/22/2013] [Indexed: 01/01/2023]
Abstract
Nucleotide-binding domain and leucine-rich repeat-containing receptors (NLRs) regulate innate immunity by activating inflammatory responses in a variety of biological systems following the recognition of pathogen- or disease-associated molecular patterns. NLRs are characterized by a central nucleotide-binding and oligomerization (NACHT) domain found in P-loop NTPases. In this review, we detail the functional and structural properties of the NACHT domain of a subfamily of NLRs, the NLRPs (NLR containing a pyrin domain), based on previous studies, sequence analysis, homology modeling, and structure predictions. Several NLRPs have been found to regulate inflammatory responses through the assembly of oligomeric caspase 1-activating platforms known as inflammasomes, the 3-dimensional structure of the NLRP NACHT domain has still not been solved. Homology modeling suggests that sequence variability within the NACHT domains of different NLRP family members may alter the topology of the ATP-binding pocket. Based on this finding, we discuss the potential therapeutic prospects aligned with the NACHT domain and the development of selective inhibitors of inflammasome activity.
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Affiliation(s)
- Justin A MacDonald
- Libin Cardiovascular Institute and Department of Biochemistry & Molecular Biology, University of Calgary, Calgary, Alberta, T2N 4Z6, Canada
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Abstract
Microglia and macrophages in the CNS contain multimolecular complexes termed inflammasomes. Inflammasomes function as intracellular sensors for infectious agents as well as for host-derived danger signals that are associated with neurological diseases, including meningitis, stroke and Alzheimer's disease. Assembly of an inflammasome activates caspase 1 and, subsequently, the proteolysis and release of the cytokines interleukin-1β and interleukin-18, as well as pyroptotic cell death. Since the discovery of inflammasomes in 2002, there has been burgeoning recognition of their complexities and functions. Here, we review the current understanding of the functions of different inflammasomes in the CNS and their roles in neurological diseases.
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Affiliation(s)
- John G Walsh
- Department of Medicine (Neurology), University of Alberta, Edmonton, Alberta T6G 2S2, Canada
| | - Daniel A Muruve
- Department of Medicine (Nephrology), University of Calgary, Calgary, Alberta T2N 4N1, Canada
| | - Christopher Power
- Department of Medicine (Neurology), University of Alberta, Edmonton, Alberta T6G 2S2, Canada
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Chung H, Ramachandran R, Hollenberg MD, Muruve DA. Proteinase-activated receptor-2 transactivation of epidermal growth factor receptor and transforming growth factor-β receptor signaling pathways contributes to renal fibrosis. J Biol Chem 2013; 288:37319-31. [PMID: 24253040 DOI: 10.1074/jbc.m113.492793] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Chronic kidney diseases cause significant morbidity and mortality in the population. During renal injury, kidney-localized proteinases can signal by cleaving and activating proteinase-activated receptor-2 (PAR2), a G-protein-coupled receptor involved in inflammation and fibrosis that is highly expressed in renal tubular cells. Following unilateral ureteric obstruction, PAR2-deficient mice displayed reduced renal tubular injury, fibrosis, collagen synthesis, connective tissue growth factor (CTGF), and α-smooth muscle actin gene expression at 7 days, compared with wild-type controls. In human proximal tubular epithelial cells in vitro, PAR2 stimulation with PAR2-activating peptide (PAR2-AP) alone significantly up-regulated the expression of CTGF, a potent profibrotic cytokine. The induction of CTGF by PAR2-AP was synergistically increased when combined with transforming growth factor-β (TGF-β). Consistent with these findings, treating human proximal tubular epithelial cells with PAR2-AP induced Smad2/3 phosphorylation in the canonical TGF-β signaling pathway. The Smad2 phosphorylation and CTGF induction required signaling via both the TGFβ-receptor and EGF receptor suggesting that PAR2 utilizes transactivation mechanisms to initiate fibrogenic signaling. Taken together, our data support the hypothesis that PAR2 synergizes with the TGFβ signaling pathway to contribute to renal injury and fibrosis.
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Liu YY, Jia W, Wanke IE, Muruve DA, Xiao HP, Wong NCW. Glucose regulates secretion of exogenously expressed insulin from HepG2 cells in vitro and in a mouse model of diabetes mellitus in vivo. J Mol Endocrinol 2013; 50:337-46. [PMID: 23475748 DOI: 10.1530/jme-12-0239] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Glucose-controlled insulin secretion is a key component of its regulation. Here, we examined whether liver cell secretion of insulin derived from an engineered construct can be regulated by glucose. Adenovirus constructs were designed to express proinsulin or mature insulin containing the conditional binding domain (CBD). This motif binds GRP78 (HSPA5), an endoplasmic reticulum (ER) protein that enables the chimeric hormone to enter into and stay within the ER until glucose regulates its release from the organelle. Infected HepG2 cells expressed proinsulin mRNA and the protein containing the CBD. Immunocytochemistry studies suggested that GRP78 and proinsulin appeared together in the ER of the cell. The amount of hormone released from infected cells varied directly with the ambient concentration of glucose in the media. Glucose-regulated release of the hormone from infected cells was rapid and sustained. Removal of glucose from the cells decreased release of the hormone. In streptozotocin-induced diabetic mice, when infected with adenovirus expressing mature insulin, glucose levels declined. Our data show that glucose regulates release of exogenously expressed insulin from the ER of liver cells. This approach may be useful in devising new ways to treat diabetes mellitus.
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Affiliation(s)
- Y Y Liu
- Department of Endocrinology, First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510080, People's Republic of China
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Bracey NA, Beck PL, Muruve DA, Hirota SA, Guo J, Jabagi H, Wright Jr JR, MacDonald JA, Lees-Miller JP, Roach D, Semeniuk LM, Duff HJ. The Nlrp3 inflammasome promotes myocardial dysfunction in structural cardiomyopathy through interleukin-1β. Exp Physiol 2013; 98:462-72. [DOI: 10.1113/expphysiol.2012.068338] [Citation(s) in RCA: 130] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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40
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Wang W, Wang X, Chun J, Vilaysane A, Clark S, French G, Bracey NA, Trpkov K, Bonni S, Duff HJ, Beck PL, Muruve DA. Inflammasome-independent NLRP3 augments TGF-β signaling in kidney epithelium. J Immunol 2012; 190:1239-49. [PMID: 23264657 DOI: 10.4049/jimmunol.1201959] [Citation(s) in RCA: 188] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Tubulointerstitial inflammation and fibrosis are strongly associated with the outcome of chronic kidney disease. We recently demonstrated that the NOD-like receptor, pyrin domain containing-3 (NLRP3) contributes to renal inflammation, injury, and fibrosis following unilateral ureteric obstruction in mice. NLRP3 expression in renal tubular epithelial cells (TECs) was found to be an important component of experimental disease pathogenesis, although the biology of NLRP3 in epithelial cells is unknown. In human and mouse primary renal TECs, NLRP3 expression was increased in response to TGF-β1 stimulation and associated with epithelial-mesenchymal transition (EMT) and the expression of α-smooth muscle actin (αSMA) and matrix metalloproteinase (MMP) 9. TGF-β1-induced EMT and the induction of MMP-9 and αSMA were significantly decreased in mouse Nlrp3(-/-) renal TECs, suggesting a role for Nlrp3 in TGF-β-dependent signaling. Although apoptosis-associated speck-like protein containing a CARD domain(-/-) TECs demonstrated a phenotype similar to that of Nlrp3(-/-) cells in response to TGF-β1, the effect of Nlrp3 on MMP-9 and αSMA expression was inflammasome independent, as IL-1β, IL-18, MyD88, and caspase-1 were dispensable. Smad2 and Smad3 phosphorylation in response to TGF-β1 was attenuated in Nlrp3(-/-) and apoptosis-associated speck-like protein containing a CARD domain(-/-) cells, accounting for the dampened EMT and TGF-β1 responsiveness in these cells. Consistent with these findings, overexpression of NLRP3 in 293T cells resulted in increased Smad3 phosphorylation and activity. Taken together, these data support a novel and direct role for NLRP3 in promoting TGF-β signaling and R-Smad activation in epithelial cells independent of the inflammasome.
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Affiliation(s)
- Wenjie Wang
- Department of Medicine, University of Calgary, Calgary, Alberta T2N 1N4, Canada
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41
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Davis SP, Amrein M, Gillrie MR, Lee K, Muruve DA, Ho M. Plasmodium falciparum-induced CD36 clustering rapidly strengthens cytoadherence via p130CAS-mediated actin cytoskeletal rearrangement. FASEB J 2011; 26:1119-30. [PMID: 22106368 DOI: 10.1096/fj.11-196923] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The adhesion of infected red blood cells (IRBCs) to microvascular endothelium is critical in the pathogenesis of severe malaria. Here we used atomic force and confocal microscopy to examine the adhesive forces between IRBCs and human dermal microvascular endothelial cells. Initial contact of the cells generated a mean ± sd adhesion force of 167 ± 208 pN from the formation of single or multiple bonds with CD36. The strength of adhesion increased by 5- to 6-fold within minutes of contact through a signaling pathway initiated by CD36 ligation by live IRBCs, or polystyrene beads coated with anti-CD36 or PpMC-179, a recombinant peptide representing the minimal binding domain of the parasite ligand PfEMP1 to CD36. Engagement of CD36 led to localized phosphorylation of Src family kinases and the adaptor protein p130CAS, resulting in actin recruitment and CD36 clustering by 50-60% of adherent beads. Uninfected red blood cells or IgG-coated beads had no effect. Inhibition of the increase in adhesive strength by the Src family kinase inhibitor PP1 or gene silencing of p130CAS decreased adhesion by 39 ± 12 and 48 ± 20%, respectively, at 10 dyn/cm(2) in a flow chamber assay. Modulation of adhesive strength at PfEMP1-CD36-actin cytoskeleton synapses could be a novel target for antiadhesive therapy.
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Affiliation(s)
- Shevaun P Davis
- Department of Microbiology, Immunology, and Infectious Diseases, 3330 Hospital Dr. NW, Calgary, AB, Canada T2N 4N1
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42
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Nicholl DDM, Hemmelgarn BR, Turin TC, MacRae JM, Muruve DA, Sola DY, Ahmed SB. Increased urinary protein excretion in the "normal" range is associated with increased renin-angiotensin system activity. Am J Physiol Renal Physiol 2011; 302:F526-32. [PMID: 22088437 DOI: 10.1152/ajprenal.00458.2011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Increased levels of albuminuria and proteinuria, both linked to augmented renin-angiotensin system (RAS) activity, are associated with adverse kidney and cardiovascular events. However, the relationship between variations in urinary albumin excretion (UAE) and total protein excretion (UTPE) in the normal range and RAS activity is unclear. We examined the association between UAE and UTPE and the hemodynamic response to angiotensin II (ANG II) challenge, a well-accepted indirect measure of RAS activity, in healthy individuals with normal UAE and UTPE. Forty subjects (15 men, 25 women; age 38 ± 2 yr; UAE, 3.32 ± 0.55 mg/day; UTPE, 56.8 ± 3.6 mg/day) were studied in high-salt balance. Blood pressure (BP), arterial stiffness determined by applanation tonometry, and circulating RAS components were measured at baseline and in response to graded ANG II infusion. The primary outcome was the BP response to ANG II challenge at 30 and 60 min. UAE was associated with a blunted diastolic BP response to ANG II infusion (30 min, P = 0.005; 60 min, P = 0.17), a relationship which remained even after adjustment (30 min, P < 0.001; 60 min, P = 0.035). Similar results were observed with UTPE (30 min, P = 0.031; 60 min, P = 0.001), even after multivariate analysis (30 min, P = 0.008; 60 min, P = 0.001). Neither UAE nor UTPE was associated with systolic BP, circulating RAS components, or arterial stiffness responses to ANG II challenge. Among healthy individuals with UAE and UTPE in the normal range, increased levels of these measures were independently associated with a blunted diastolic BP response to ANG II, indicating increased vascular RAS activity, which is known to be deleterious to both renal and cardiac function.
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Affiliation(s)
- David D M Nicholl
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
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Mason DR, Beck PL, Muruve DA. Nucleotide-binding oligomerization domain-like receptors and inflammasomes in the pathogenesis of non-microbial inflammation and diseases. J Innate Immun 2011; 4:16-30. [PMID: 22067846 DOI: 10.1159/000334247] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Accepted: 10/10/2011] [Indexed: 12/18/2022] Open
Abstract
The nucleotide-binding oligomerization domain (NOD)-like receptor (NLR) or nucleotide-binding domain leucine-rich repeat-containing family of genes plays an important role in the development of innate immune responses. Some family members are known to form multiprotein complexes known as inflammasomes that regulate the processing and secretion of proinflammatory mediators, such as interleukin-1β and interleukin-18. Activity of the inflammasome is triggered not only by microbial infection, but also by a wide range of both exogenous and endogenous noninfectious stimuli. Consequently, the dysregulation of inflammasome activity is associated with numerous proinflammatory, non-microbial human diseases. The discovery of NLRP3 gene mutations in autoinflammatory diseases such as Muckle-Wells syndrome has led to the association of NLRs in the pathogenesis of many non-microbial diseases that include arthritis, neurodegenerative disorders, metabolic disorders (obesity and diabetes), cardiovascular disease (atherosclerosis, myocardial infarction), inflammatory bowel disease, kidney disease and hypersensitivity dermatitis. A number of NLRs are also associated with human disease in the absence of inflammasome activity, suggesting additional roles for NLRs in the regulation of inflammation and disease. This review serves to provide a summary of NLR-associated diseases and, where possible, the mechanisms behind the associations.
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Affiliation(s)
- D Randal Mason
- Department of Medicine, Immunology Research Group and the Institute of Infection, Immunity and Inflammation, University of Calgary, Calgary, Alta., Canada
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Ramachandran R, Mihara K, Chung H, Renaux B, Lau CS, Muruve DA, DeFea KA, Bouvier M, Hollenberg MD. Neutrophil elastase acts as a biased agonist for proteinase-activated receptor-2 (PAR2). J Biol Chem 2011; 286:24638-48. [PMID: 21576245 DOI: 10.1074/jbc.m110.201988] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Human neutrophil proteinases (elastase, proteinase-3, and cathepsin-G) are released at sites of acute inflammation. We hypothesized that these inflammation-associated proteinases can affect cell signaling by targeting proteinase-activated receptor-2 (PAR(2)). The PAR family of G protein-coupled receptors is triggered by a unique mechanism involving the proteolytic unmasking of an N-terminal self-activating tethered ligand (TL). Proteinases can either activate PAR signaling by unmasking the TL sequence or disarm the receptor for subsequent enzyme activation by cleaving downstream from the TL sequence. We found that none of neutrophil elastase, cathepsin-G, and proteinase-3 can activate G(q)-coupled PAR(2) calcium signaling; but all of these proteinases can disarm PAR(2), releasing the N-terminal TL sequence, thereby preventing G(q)-coupled PAR(2) signaling by trypsin. Interestingly, elastase (but neither cathepsin-G nor proteinase-3) causes a TL-independent PAR(2)-mediated activation of MAPK that, unlike the canonical trypsin activation, does not involve either receptor internalization or recruitment of β-arrestin. Cleavage of synthetic peptides derived from the extracellular N terminus of PAR(2), downstream of the TL sequence, demonstrated distinct proteolytic sites for all three neutrophil-derived enzymes. We conclude that in inflammation, neutrophil proteinases can modulate PAR(2) signaling by preventing/disarming the G(q)/calcium signal pathway and, via elastase, can selectively activate the p44/42 MAPK pathway. Our data illustrate a new mode of PAR regulation that involves biased PAR(2) signaling by neutrophil elastase and a disarming/silencing effect of cathepsin-G and proteinase-3.
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Affiliation(s)
- Rithwik Ramachandran
- Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta T2N 4N1, Canada.
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Abstract
Renal inflammation is a universal response to infectious and noninfectious triggers. Sensors of the innate immune system, such as Toll-like receptors or RIG-like receptors, provide danger recognition platforms on renal cells that integrate and translate the diverse triggers of renal inflammation by inducing cell activation and the secretion of proinflammatory cytokines and chemokines. As a new entry, the inflammasome-forming NLR genes integrate various danger signals into caspase-1-activating platforms that regulate the processing and secretion of pro-IL-1β and pro-IL-18 into the mature and active cytokines. Accumulating data now document a role for the NLRP3 inflammasome and IL-1β/IL-18 in many diseases, including atherosclerosis, diabetes, amyloidosis, malaria, crystal-related diseases, and other autoinflammatory disorders, identifying this innate immune pathway as an attractive therapeutic target. Here we review the current knowledge regarding inflammasome signaling and outline existing evidence on the expression and functional role of the inflammasome-caspase-1-IL-1β/IL-18 axis in kidney disease. We further provide a perspective on the potential roles of the inflammasomes in the pathogenesis of acute and chronic kidney diseases.
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Flach TL, Ng G, Hari A, Desrosiers MD, Zhang P, Ward SM, Seamone ME, Vilaysane A, Mucsi AD, Fong Y, Prenner E, Ling CC, Tschopp J, Muruve DA, Amrein MW, Shi Y. Alum interaction with dendritic cell membrane lipids is essential for its adjuvanticity. Nat Med 2011; 17:479-87. [PMID: 21399646 DOI: 10.1038/nm.2306] [Citation(s) in RCA: 287] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2010] [Accepted: 01/18/2011] [Indexed: 12/16/2022]
Abstract
As an approved vaccine adjuvant for use in humans, alum has vast health implications, but, as it is a crystal, questions remain regarding its mechanism. Furthermore, little is known about the target cells, receptors, and signaling pathways engaged by alum. Here we report that, independent of inflammasome and membrane proteins, alum binds dendritic cell (DC) plasma membrane lipids with substantial force. Subsequent lipid sorting activates an abortive phagocytic response that leads to antigen uptake. Such activated DCs, without further association with alum, show high affinity and stable binding with CD4(+) T cells via the adhesion molecules intercellular adhesion molecule-1 (ICAM-1) and lymphocyte function-associated antigen-1 (LFA-1). We propose that alum triggers DC responses by altering membrane lipid structures. This study therefore suggests an unexpected mechanism for how this crystalline structure interacts with the immune system and how the DC plasma membrane may behave as a general sensor for solid structures.
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Affiliation(s)
- Tracy L Flach
- Immunology Research Group, Department of Microbiology & Infectious Diseases, and Snyder Institute, University of Calgary, Calgary, Alberta, Canada
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McDonald B, Pittman K, Menezes GB, Hirota SA, Slaba I, Waterhouse CCM, Beck PL, Muruve DA, Kubes P. Intravascular danger signals guide neutrophils to sites of sterile inflammation. Science 2010; 330:362-6. [PMID: 20947763 DOI: 10.1126/science.1195491] [Citation(s) in RCA: 873] [Impact Index Per Article: 62.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Neutrophils are recruited from the blood to sites of sterile inflammation, where they contribute to wound healing but may also cause tissue damage. By using spinning disk confocal intravital microscopy, we examined the kinetics and molecular mechanisms of neutrophil recruitment to sites of focal hepatic necrosis in vivo. Adenosine triphosphate released from necrotic cells activated the Nlrp3 inflammasome to generate an inflammatory microenvironment that alerted circulating neutrophils to adhere within liver sinusoids. Subsequently, generation of an intravascular chemokine gradient directed neutrophil migration through healthy tissue toward foci of damage. Lastly, formyl-peptide signals released from necrotic cells guided neutrophils through nonperfused sinusoids into the injury. Thus, dynamic in vivo imaging revealed a multistep hierarchy of directional cues that guide neutrophil localization to sites of sterile inflammation.
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Affiliation(s)
- Braedon McDonald
- Immunology Research Group, University of Calgary, Alberta T2N 4N1, Canada
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48
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Vilaysane A, Chun J, Seamone ME, Wang W, Chin R, Hirota S, Li Y, Clark SA, Tschopp J, Trpkov K, Hemmelgarn BR, Beck PL, Muruve DA. The NLRP3 inflammasome promotes renal inflammation and contributes to CKD. J Am Soc Nephrol 2010; 21:1732-44. [PMID: 20688930 DOI: 10.1681/asn.2010020143] [Citation(s) in RCA: 416] [Impact Index Per Article: 29.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Inflammation significantly contributes to the progression of chronic kidney disease (CKD). Inflammasome-dependent cytokines, such as IL-1β and IL-18, play a role in CKD, but their regulation during renal injury is unknown. Here, we analyzed the processing of caspase-1, IL-1β, and IL-18 after unilateral ureteral obstruction (UUO) in mice, which suggested activation of the Nlrp3 inflammasome during renal injury. Compared with wild-type mice, Nlrp3(-/-) mice had less tubular injury, inflammation, and fibrosis after UUO, associated with a reduction in caspase-1 activation and maturation of IL-1β and IL-18; these data confirm that the Nlrp3 inflammasome upregulates these cytokines in the kidney during injury. Bone marrow chimeras revealed that Nlrp3 mediates the injurious/inflammatory processes in both hematopoietic and nonhematopoietic cellular compartments. In tissue from human renal biopsies, a wide variety of nondiabetic kidney diseases exhibited increased expression of NLRP3 mRNA, which correlated with renal function. Taken together, these results strongly support a role for NLRP3 in renal injury and identify the inflammasome as a possible therapeutic target in the treatment of patients with progressive CKD.
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Affiliation(s)
- Akosua Vilaysane
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
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Ng J, Hirota SA, Gross O, Li Y, Ulke-Lemee A, Potentier MS, Schenck LP, Vilaysane A, Seamone ME, Feng H, Armstrong GD, Tschopp J, Macdonald JA, Muruve DA, Beck PL. Clostridium difficile toxin-induced inflammation and intestinal injury are mediated by the inflammasome. Gastroenterology 2010; 139:542-52, 552.e1-3. [PMID: 20398664 DOI: 10.1053/j.gastro.2010.04.005] [Citation(s) in RCA: 174] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2009] [Revised: 03/23/2010] [Accepted: 04/08/2010] [Indexed: 01/05/2023]
Abstract
BACKGROUND & AIMS Clostridium difficile-associated disease (CDAD) is the leading cause of nosocomial diarrhea in the United States. C difficile toxins TcdA and TcdB breach the intestinal barrier and trigger mucosal inflammation and intestinal damage. The inflammasome is an intracellular danger sensor of the innate immune system. In the present study, we hypothesize that TcdA and TcdB trigger inflammasome-dependent interleukin (IL)-1beta production, which contributes to the pathogenesis of CDAD. METHODS Macrophages exposed to TcdA and TcdB were assessed for IL-1beta production, an indication of inflammasome activation. Macrophages deficient in components of the inflammasome were also assessed. Truncated/mutated forms of TcdB were assessed for their ability to activate the inflammasome. The role of inflammasome signaling in vivo was assessed in ASC-deficient and IL-1 receptor antagonist-treated mice. RESULTS TcdA and TcdB triggered inflammasome activation and IL-1beta secretion in macrophages and human mucosal biopsy specimens. Deletion of Nlrp3 decreased, whereas deletion of ASC completely abolished, toxin-induced IL-1beta release. TcdB-induced IL-1beta release required recognition of the full-length toxin but not its enzymatic function. In vivo, deletion of ASC significantly reduced toxin-induced inflammation and damage, an effect that was mimicked by pretreatment with the IL-1 receptor antagonist anakinra. CONCLUSIONS TcdA and TcdB trigger IL-1beta release by activating an ASC-containing inflammasome, a response that contributes to toxin-induced inflammation and damage in vivo. Pretreating mice with the IL-1 receptor antagonist anakinra afforded the same level of protection that was observed in ASC-/- mice. These data suggest that targeting inflammasome or IL-1beta signaling may represent new therapeutic targets in the treatment of CDAD.
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Affiliation(s)
- Jeffrey Ng
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
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Gillrie MR, Zbytnuik L, McAvoy E, Kapadia R, Lee K, Waterhouse CCM, Davis SP, Muruve DA, Kubes P, Ho M. Divergent roles of Toll-like receptor 2 in response to lipoteichoic acid and Staphylococcus aureus in vivo. Eur J Immunol 2010; 40:1639-50. [PMID: 20306471 DOI: 10.1002/eji.200939929] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The response of leukocytes to lipoteichoic acid (LTA), a TLR2-dependent major cell wall component of Staphylococcus aureus, is linked to the outcome of an infection. In this study we investigated the role of nonhematopoietic TLR2 in response to LTA and S. aureus by creating bone marrow chimeras. Significant leukocyte recruitment in response to LTA required IFN-gamma priming in WT C57BL/6 and TLR2(-/-)-->WT mice, but was not observed in TLR2(-/-) or WT-->TLR2(-/-) animals. LTA also induced a proinflammatory response in IFN-gamma primed primary human microvascular endothelial cells leading to leukocyte recruitment in vitro. When mice were infected with S. aureus, the most profound elevation of TNF-alpha and IL-6 was seen in TLR2(-/-) and TLR2(-/-)-->WT mice. TLR2(-/-), but not chimeric mice, demonstrated increased IL-17, blood leukocytosis and pulmonary neutrophilia compared to WT mice. Collectively, the results suggest an essential role for IFN-gamma and nonhematopoietic TLR2 for leukocyte recruitment in response to LTA. In contrast, TLR2 on both hematopoietic and nonhematopoietic cells appears to orchestrate an inhibitory response to S. aureus such that in complete TLR2 deficiency, there is an exaggerated proinflammatory response and/or skewing of the immune response towards a Th17 phenotype that may contribute to the decreased survival of TLR2(-/-) mice.
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Affiliation(s)
- Mark R Gillrie
- Department of Microbiology and Infectious Diseases, University of Calgary, Calgary, AB, Canada
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