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Role of Endothelial Glucocorticoid Receptor in the Pathogenesis of Kidney Diseases. Int J Mol Sci 2021; 22:ijms222413295. [PMID: 34948091 PMCID: PMC8706765 DOI: 10.3390/ijms222413295] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 12/05/2021] [Accepted: 12/07/2021] [Indexed: 01/12/2023] Open
Abstract
Glucocorticoids, as multifunctional hormones, are widely used in the treatment of various diseases including nephrological disorders. They are known to affect immunological cells, effectively treating many autoimmune and inflammatory processes. Furthermore, there is a growing body of evidence demonstrating the potent role of glucocorticoids in non-immune cells such as podocytes. Moreover, novel data show additional pathways and processes affected by glucocorticoids, such as the Wnt pathway or autophagy. The endothelium is currently considered as a key organ in the regulation of numerous kidney functions such as glomerular filtration, vascular tone and the regulation of inflammation and coagulation. In this review, we analyse the literature concerning the effects of endothelial glucocorticoid receptor signalling on kidney function in health and disease, with special focus on hypertension, diabetic kidney disease, glomerulopathies and chronic kidney disease. Recent studies demonstrate the potential role of endothelial GR in the prevention of fibrosis of kidney tissue and cell metabolism through Wnt pathways, which could have a protective effect against disease progression. Another important aspect covered in this review is blood pressure regulation though GR and eNOS. We also briefly cover potential therapies that might affect the endothelial glucocorticoid receptor and its possible clinical implications, with special interest in selective or local GR stimulation and potential mitigation of GC treatment side effects.
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Reina-Torres E, De Ieso ML, Pasquale LR, Madekurozwa M, van Batenburg-Sherwood J, Overby DR, Stamer WD. The vital role for nitric oxide in intraocular pressure homeostasis. Prog Retin Eye Res 2020; 83:100922. [PMID: 33253900 DOI: 10.1016/j.preteyeres.2020.100922] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 11/13/2020] [Accepted: 11/23/2020] [Indexed: 02/07/2023]
Abstract
Catalyzed by endothelial nitric oxide (NO) synthase (eNOS) activity, NO is a gaseous signaling molecule maintaining endothelial and cardiovascular homeostasis. Principally, NO regulates the contractility of vascular smooth muscle cells and permeability of endothelial cells in response to either biochemical or biomechanical cues. In the conventional outflow pathway of the eye, the smooth muscle-like trabecular meshwork (TM) cells and Schlemm's canal (SC) endothelium control aqueous humor outflow resistance, and therefore intraocular pressure (IOP). The mechanisms by which outflow resistance is regulated are complicated, but NO appears to be a key player as enhancement or inhibition of NO signaling dramatically affects outflow function; and polymorphisms in NOS3, the gene that encodes eNOS modifies the relation between various environmental exposures and glaucoma. Based upon a comprehensive review of past foundational studies, we present a model whereby NO controls a feedback signaling loop in the conventional outflow pathway that is sensitive to changes in IOP and its oscillations. Thus, upon IOP elevation, the outflow pathway tissues distend, and the SC lumen narrows resulting in increased SC endothelial shear stress and stretch. In response, SC cells upregulate the production of NO, relaxing neighboring TM cells and increasing permeability of SC's inner wall. These IOP-dependent changes in the outflow pathway tissues reduce the resistance to aqueous humor drainage and lower IOP, which, in turn, diminishes the biomechanical signaling on SC. Similar to cardiovascular pathogenesis, dysregulation of the eNOS/NO system leads to dysfunctional outflow regulation and ocular hypertension, eventually resulting in primary open-angle glaucoma.
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Affiliation(s)
| | | | - Louis R Pasquale
- Eye and Vision Research Institute of New York Eye and Ear Infirmary at Mount Sinai, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | | | | | - Darryl R Overby
- Department of Bioengineering, Imperial College London, London, UK.
| | - W Daniel Stamer
- Department of Ophthalmology, Duke University, Durham, NC, USA.
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Dexamethasone Does Not Inhibit Treadmill Training-Induced Angiogenesis in Myocardium: Role of MicroRNA-126 Pathway. J Cardiovasc Pharmacol 2020; 76:708-714. [PMID: 33105326 DOI: 10.1097/fjc.0000000000000924] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Dexamethasone (DEX) has important anti-inflammatory activities; however, it induces hypertension and skeletal muscle microcirculation rarefaction. Nevertheless, nothing is known about DEX outcomes on cardiac microcirculation. By contrast, exercise training prevents skeletal and cardiac microvessel loss because of microRNA expression and a better balance between their related angiogenic and apoptotic proteins in spontaneously hypertensive rats. The purpose of this study was to investigate whether DEX and/or exercise training could induce microRNA alterations leading to cardiac angiogenesis or microvascular rarefaction. Animals performed 8 weeks of exercise training and were treated with DEX (50 μg/kg per day, subcutaneously) for 14 days. Cardiovascular parameters were measured, and the left ventricle muscle was collected for analyses. DEX treatment increased arterial pressure and did not cause cardiac microcirculation rarefaction. Treadmill training prevented the DEX-induced increase in arterial pressure. In addition, training, regardless of DEX treatment, increased microRNA-126 expression, phospho-protein kinase B/protein kinase B, and endothelial nitric oxide synthase levels associated with cardiac angiogenesis. In conclusion, this study suggests, for the first time, that treadmill training induces myocardial angiogenesis because of angiogenic pathway improvement associated with an increase in microRNA-126. Furthermore, DEX, per se, did not cause capillary density alterations and did not attenuate cardiac angiogenesis induced by training.
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Herrera NA, Duchatsch F, Kahlke A, Amaral SL, Vasquez-Vivar J. In vivo vascular rarefaction and hypertension induced by dexamethasone are related to phosphatase PTP1B activation not endothelial metabolic changes. Free Radic Biol Med 2020; 152:689-696. [PMID: 31978540 PMCID: PMC8546799 DOI: 10.1016/j.freeradbiomed.2020.01.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 01/11/2020] [Accepted: 01/13/2020] [Indexed: 12/31/2022]
Abstract
Glucocorticoids have important anti-inflammatory and immunomodulatory activities. Dexamethasone (Dex), a synthetic glucocorticoid, induces insulin resistance, hyperglycemia, and hypertension. The hypertensive mechanisms of Dex are not well understood. Previously, we showed that exercise training prior to Dex treatment significantly decreases blood vessel loss and hypertension in rats. In this study, we examined whether the salutary effects of exercise are associated with an enhanced metabolic profile. Analysis of the NAD and ATP content in the tibialis anterior muscle of trained and non-trained animals indicated that exercise increases both NAD and ATP; however, Dex treatment had no effect on any of the experimental groups. Likewise, Dex did not change NAD and ATP in cultured endothelial cells following 24 h and 48 h of incubation with high concentrations. Reduced VEGF-stimulated NO production, however, was verified in endothelial cultured cells. Reduced NO was not associated with changes in survival or the BH4 to BH2 ratio. Moreover, Dex had no effect on bradykinin- or shear-stress-stimulated NO production, indicating that VEGF-stimulated eNOS phosphorylation is a target of Dex's effects. The PTP1B inhibitor increased NO in Dex-treated cells in a dose-dependent fashion, an effect that was replicated by the glucocorticoid receptor inhibitor, RU486. In combination, these results indicate that Dex-induced endothelial dysfunction is mediated by glucocorticoid receptor and PTP1B activation. Moreover, since exercise reduces the expression of PTP1B and normalized insulin resistance in aging rats, our findings indicate that exercise training by reducing PTP1B activity counteracts Dex-induced hypertension in vivo.
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Affiliation(s)
- Naiara Araújo Herrera
- Joint Graduate Program in Physiological Sciences, PIPGCF UFSCar/UNESP, Rodovia Washington Luiz, São Carlos/SP, Brazil; Department of Physical Education, São Paulo State University, School of Sciences, Av. Eng. Luiz Edmundo Carrijo Coube, Brazil
| | - Francine Duchatsch
- Joint Graduate Program in Physiological Sciences, PIPGCF UFSCar/UNESP, Rodovia Washington Luiz, São Carlos/SP, Brazil; Department of Physical Education, São Paulo State University, School of Sciences, Av. Eng. Luiz Edmundo Carrijo Coube, Brazil
| | - Allison Kahlke
- Department of Biophysics, Redox Biology Program, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Sandra Lia Amaral
- Joint Graduate Program in Physiological Sciences, PIPGCF UFSCar/UNESP, Rodovia Washington Luiz, São Carlos/SP, Brazil; Department of Physical Education, São Paulo State University, School of Sciences, Av. Eng. Luiz Edmundo Carrijo Coube, Brazil
| | - Jeannette Vasquez-Vivar
- Department of Biophysics, Redox Biology Program, Medical College of Wisconsin, Milwaukee, WI, United States.
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Kim SH, Pei QM, Jiang P, Liu J, Sun RF, Qian XJ, Liu JB. Effects of dexamethasone on VEGF-induced MUC5AC expression in human primary bronchial epithelial cells: Implications for asthma. Exp Cell Res 2020; 389:111897. [PMID: 32035951 DOI: 10.1016/j.yexcr.2020.111897] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Revised: 02/04/2020] [Accepted: 02/05/2020] [Indexed: 11/17/2022]
Abstract
Mucins are major macromolecular components of lung mucus that are mainly responsible for the viscoelastic property of mucus. MUC5AC is a major mucin glycoprotein that is hypersecreted in asthmatic individuals. Vascular endothelial growth factor (VEGF) has been implicated in inflammatory and airway blood vessel remodeling in asthmatics. Our previous studies indicate that VEGF upregulates MUC5AC expression by interacting with VEGF receptor 2 (VEGFR2). It has been shown that dexamethasone (Dex) downregulates MUC5AC expression; however, the underlying mechanisms have not been completely elucidated. Therefore, we sought to investigate the effect of Dex on MUC5AC expression induced by VEGF and study the underlying mechanisms. We tested the effects of Dex on VEGFR2 and RhoA activation, caveolin-1 expression, and the association of caveolin-1 and VEGFR2 in primary bronchial epithelial cells. Dex downregulated MUC5AC mRNA and protein levels in a dose- and time-dependent manner, and suppressed the activation of VEGFR2 and RhoA induced by VEGF. Additionally, Dex upregulated caveolin-1 protein levels in a dose- and time-dependent manner. Furthermore, phospho-VEGFR2 expression was decreased through overexpression of caveolin-1 and increased after caveolin-1 knockdown. Dex treatment attenuated the VEGF-decreased association of caveolin-1 and VEGFR2. Collectively, our findings suggest that Dex downregulates VEGF-induced MUC5AC expression by inactivating VEGFR2 and RhoA. Furthermore, decreased MUC5AC expression by Dex was related to the increased association of caveolin-1 with VEGFR2. Further studies characterizing these mechanisms are required to facilitate the development of improved treatment strategies for asthma.
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Affiliation(s)
- Sung-Ho Kim
- Department of Respiration, Tianjin First Central Hospital, Tianjin, China.
| | - Qing-Mei Pei
- Department of Radiology, Tianjin Hospital of Integrated Traditional Chinese and Western Medicine, Tianjin, China.
| | - Ping Jiang
- Department of Respiration, Tianjin First Central Hospital, Tianjin, China.
| | - Juan Liu
- Department of Respiration, Tianjin First Central Hospital, Tianjin, China.
| | - Rong-Fei Sun
- Department of Respiration, Tianjin First Central Hospital, Tianjin, China.
| | - Xue-Jiao Qian
- Department of Respiration, Tianjin First Central Hospital, Tianjin, China.
| | - Jiang-Bo Liu
- Department of Respiration, Tianjin First Central Hospital, Tianjin, China.
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Kruglikov IL, Scherer PE. Caveolin as a Universal Target in Dermatology. Int J Mol Sci 2019; 21:E80. [PMID: 31877626 PMCID: PMC6981867 DOI: 10.3390/ijms21010080] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 12/14/2019] [Accepted: 12/18/2019] [Indexed: 02/07/2023] Open
Abstract
Caveolin-1 is strongly expressed in different dermal and subdermal cells and physically interacts with signaling molecules and receptors, among them with transforming growth factor beta (TGF-β), matrix metalloproteinases, heat shock proteins, toll-like and glucocorticoid receptors. It should therefore be heavily involved in the regulation of cellular signaling in various hyperproliferative and inflammatory skin conditions. We provide an overview of the role of the caveolin-1 expression in different hyperproliferative and inflammatory skin diseases and discuss its possible active involvement in the therapeutic effects of different well-known drugs widely applied in dermatology. We also discuss the possible role of caveolin expression in development of the drug resistance in dermatology. Caveolin-1 is not only an important pathophysiological factor in different hyperproliferative and inflammatory dermatological conditions, but can also serve as a target for their treatment. Targeted regulation of caveolin is likely to serve as a new treatment strategy in dermatology.
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Affiliation(s)
| | - Philipp E. Scherer
- Touchstone Diabetes Center, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390-8549, USA
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Inthachart K, Manotham K, Eiam-Ong S, Eiam-Ong S. Aldosterone Rapidly Enhances Levels of the Striatin and Caveolin-1 Proteins in Rat Kidney: The Role of the Mineralocorticoid Receptor. Endocrinol Metab (Seoul) 2019; 34:291-301. [PMID: 31565882 PMCID: PMC6769340 DOI: 10.3803/enm.2019.34.3.291] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 06/28/2019] [Accepted: 07/01/2019] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND Striatin and caveolin-1 (cav-1) are scaffolding/regulating proteins that are associated with salt-sensitive high blood pressure and promote renal sodium and water reabsorption, respectively. The mineralocorticoid receptor (MR) interacts with striatin and cav-1, while aldosterone increases striatin and cav-1 levels. However, no in vivo data have been reported for the levels of these proteins in the kidney. METHODS Male Wistar rats were intraperitoneally injected with normal saline solution, aldosterone alone (Aldo: 150 μg/kg body weight), or aldosterone after pretreatment with eplerenone, an MR blocker, 30 minutes before the aldosterone injection (eplerenone [Ep.]+Aldo). Thirty minutes after the aldosterone injection, the amount and localization of striatin and cav-1 were determined by Western blot analysis and immunohistochemistry, respectively. RESULTS Aldosterone increased striatin levels by 150% (P<0.05), and cav-1 levels by 200% (P<0.001). Eplerenone had no significant effect on striatin levels, but partially blocked the aldosterone-induced increase in cav-1 levels. Aldosterone stimulated striatin and cav-1 immunoreactivity in both the cortex and medulla. Eplerenone reduced cav-1 immunostaining in both areas; however, striatin intensity was reduced in the cortex, but increased in the medulla. CONCLUSION This is the first in vivo study demonstrating that aldosterone rapidly enhances renal levels of striatin and cav-1. Aldosterone increases striatin levels via an MR-independent pathway, whereas cav-1 is partially regulated through MR.
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Affiliation(s)
- Kevalin Inthachart
- Interdepartment of Physiology, Chulalongkorn University Graduate School, Bangkok, Thailand
| | | | - Somchai Eiam-Ong
- Division of Nephrology, Department of Medicine, Chulalongkorn University Faculty of Medicine, Bangkok, Thailand
| | - Somchit Eiam-Ong
- Department of Physiology, Chulalongkorn University Faculty of Medicine, Bangkok, Thailand.
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Pharmacological and Genetic Inhibition of Caveolin-1 Promotes Epithelialization and Wound Closure. Mol Ther 2019; 27:1992-2004. [PMID: 31409528 DOI: 10.1016/j.ymthe.2019.07.016] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 07/10/2019] [Accepted: 07/17/2019] [Indexed: 12/20/2022] Open
Abstract
Chronic wounds-including diabetic foot ulcers, venous leg ulcers, and pressure ulcers-represent a major health problem that demands an urgent solution and new therapies. Despite major burden to patients, health care professionals, and health care systems worldwide, there are no efficacious therapies approved for treatment of chronic wounds. One of the major obstacles in achieving wound closure in patients is the lack of epithelial migration. Here, we used multiple pre-clinical wound models to show that Caveolin-1 (Cav1) impedes healing and that targeting Cav1 accelerates wound closure. We found that Cav1 expression is significantly upregulated in wound edge biopsies of patients with non-healing wounds, confirming its healing-inhibitory role. Conversely, Cav1 was absent from the migrating epithelium and is downregulated in acutely healing wounds. Specifically, Cav1 interacted with membranous glucocorticoid receptor (mbGR) and epidermal growth factor receptor (EGFR) in a glucocorticoid-dependent manner to inhibit cutaneous healing. However, pharmacological disruption of caveolae by MβCD or CRISPR/Cas9-mediated Cav1 knockdown resulted in disruption of Cav1-mbGR and Cav1-EGFR complexes and promoted epithelialization and wound healing. Our data reveal a novel mechanism of inhibition of epithelialization and wound closure, providing a rationale for pharmacological targeting of Cav1 as potential therapy for patients with non-healing chronic wounds.
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Caveolin1 interacts with the glucocorticoid receptor in the lung but is dispensable for its anti-inflammatory actions in lung inflammation and Trichuris Muris infection. Sci Rep 2019; 9:8581. [PMID: 31189975 PMCID: PMC6562044 DOI: 10.1038/s41598-019-44963-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 05/24/2019] [Indexed: 11/09/2022] Open
Abstract
Glucocorticoids (Gcs) are widely prescribed anti-inflammatory compounds, which act through the glucocorticoid receptor (GR). Using an unbiased proteomics screen in lung tissue, we identified the membrane protein caveolin -1 (Cav1) as a direct interaction partner of the GR. In Cav1 knockout mice GR transactivates anti-inflammatory genes, including Dusp1, more than in controls. We therefore determined the role of Cav1 in modulating Gc action in two models of pulmonary inflammation. We first tested innate responses in lung. Loss of Cav1 impaired the inflammatory response to nebulized LPS, increasing cytokine/chemokine secretion from lung, but impairing neutrophil infiltration. Despite these changes to the inflammatory response, there was no Cav1 effect on anti-inflammatory capacity of Gcs. We also tested GR/Cav1 crosstalk in a model of allergic airway inflammation. Cav1 had a very mild effect on the inflammatory response, but no effect on the Gc response – with comparable immune cell infiltrate (macrophage, eosinophils, neutrophils), pathological score and PAS positive cells observed between both genotypes. Pursuing the Th2 adaptive immune response further we demonstrate that Cav1 knockout mice retained their ability to expel the intestinal nematode parasite T.muris, which requires adaptive Th2 immune response for elimination. Therefore, Cav1 regulates innate immune responses in the lung, but does not have an effect on Th2-mediated adaptive immunity in lung or gut. Although we demonstrate that Cav1 regulates GR transactivation of anti-inflammatory genes, this does not translate to an effect on suppression of inflammation in vivo.
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Kruglikov IL, Scherer PE. Caveolin-1 as a target in prevention and treatment of hypertrophic scarring. NPJ Regen Med 2019; 4:9. [PMID: 31044089 PMCID: PMC6486604 DOI: 10.1038/s41536-019-0071-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 04/02/2019] [Indexed: 12/11/2022] Open
Abstract
Reduced expression of caveolin-1 (Cav-1) is an important pathogenic factor in hypertrophic scarring (HTS). Such a reduction can be found in connection with the main known risk factors for HTS, including dark skin, female gender, young age, burn site and severity of the injury. The degree of overexpression of Cav-1 associated with different therapeutic options for HTS correlates with clinical improvements in HTS. This makes endo- or exogenous induction of Cav-1 not only an important therapeutic target for HTS, but also highlights its use as a preventive target to reduce or avoid HTS formation.
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Affiliation(s)
| | - Philipp E. Scherer
- Touchstone Diabetes Center, University of Texas Southwestern Medical Center, Dallas, TX 75390-8549 USA
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Wijk A, Canning P, Heijningen RP, Vogels IM, Noorden CJ, Klaassen I, Schlingemann RO. Glucocorticoids exert differential effects on the endothelium in an in vitro model of the blood-retinal barrier. Acta Ophthalmol 2019; 97:214-224. [PMID: 30168271 DOI: 10.1111/aos.13909] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 08/03/2018] [Indexed: 12/25/2022]
Abstract
PURPOSE Glucocorticoids (GCs) are used as treatment in diabetic macular oedema, a condition caused by blood-retinal barrier (BRB) disruption. The proposed mechanisms by which GCs reduce macular oedema are indirect anti-inflammatory effects and inhibition of VEGF production, but direct effects on the BRB endothelium may be equally important. Here, we investigated direct effects of GCs on the endothelium to understand the specific pathways of GC action, to enable development of novel therapeutics lacking the adverse side-effects of the presently used GCs. METHODS Primary bovine retinal endothelial cells (BRECs) were grown on Transwell inserts and treated with hydrocortisone (HC), dexamethasone (Dex) or triamcinolone acetonide (TA). Molecular barrier integrity of the BRB was determined by mRNA and protein expression, and barrier function was assessed using permeability assays. In addition, we investigated whether TA was able to prevent barrier disruption after stimulation with VEGF or cytokines. RESULTS Treatment of BRECs with GCs resulted in upregulation of tight junction mRNA (claudin-5, occludin, ZO-1) and protein (claudin-5 and ZO-1). In functional assays, only TA strengthened the barrier function by reducing endothelial permeability. Moreover, TA was able to prevent cytokine-induced permeability in human retinal endothelial cells and VEGF-induced expression of plasmalemma vesicle-associated protein (PLVAP), a key player in VEGF-induced retinal vascular leakage. CONCLUSION Glucocorticoids have differential effects in an experimental in vitro BRB model. TA is the most potent in improving barrier function, both at the molecular and functional levels, and TA prevents VEGF-induced expression of PLVAP.
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Affiliation(s)
- Anne‐Eva Wijk
- Departments of Ophthalmology and Medical Biology Amsterdam UMC University of Amsterdam Ocular Angiogenesis Group Amsterdam Cardiovascular Sciences Amsterdam Neuroscience Amsterdam The Netherlands
| | - Paul Canning
- The Wellcome‐Wolfson Institute for Experimental Medicine School of Medicine Dentistry and Biomedical Sciences Queen's University Belfast Belfast UK
| | - Rutger P. Heijningen
- Departments of Ophthalmology and Medical Biology Amsterdam UMC University of Amsterdam Ocular Angiogenesis Group Amsterdam Cardiovascular Sciences Amsterdam Neuroscience Amsterdam The Netherlands
| | - Ilse M.C. Vogels
- Departments of Ophthalmology and Medical Biology Amsterdam UMC University of Amsterdam Ocular Angiogenesis Group Amsterdam Cardiovascular Sciences Amsterdam Neuroscience Amsterdam The Netherlands
| | - Cornelis J.F. Noorden
- Departments of Ophthalmology and Medical Biology Amsterdam UMC University of Amsterdam Ocular Angiogenesis Group Amsterdam Cardiovascular Sciences Amsterdam Neuroscience Amsterdam The Netherlands
- Department of Genetic Toxicology and Cancer Biology National Institute of Biology Ljubljana Slovenia
| | - Ingeborg Klaassen
- Departments of Ophthalmology and Medical Biology Amsterdam UMC University of Amsterdam Ocular Angiogenesis Group Amsterdam Cardiovascular Sciences Amsterdam Neuroscience Amsterdam The Netherlands
| | - Reinier O. Schlingemann
- Departments of Ophthalmology and Medical Biology Amsterdam UMC University of Amsterdam Ocular Angiogenesis Group Amsterdam Cardiovascular Sciences Amsterdam Neuroscience Amsterdam The Netherlands
- Department of Ophthalmology University of Lausanne Jules Gonin Eye Hospital Lausanne Switzerland
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Cehofski LJ, Kruse A, Magnusdottir SO, Alsing AN, Nielsen JE, Kirkeby S, Honoré B, Vorum H. Dexamethasone intravitreal implant downregulates PDGFR-α and upregulates caveolin-1 in experimental branch retinal vein occlusion. Exp Eye Res 2018; 171:174-182. [PMID: 29505751 DOI: 10.1016/j.exer.2018.02.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 02/14/2018] [Accepted: 02/28/2018] [Indexed: 11/30/2022]
Abstract
A dexamethasone (DEX) intravitreal implant (OZURDEX) provides an effective treatment of inflammation secondary to branch retinal vein occlusion (BRVO). Retinal proteome changes which mediate the beneficial effects of the implant remain poorly understood. To study retinal proteome changes in BRVO following an intervention with a DEX implant this study combined an experimental model of BRVO with proteomic techniques. In eight Danish Landrace pigs experimental BRVO was induced in both eyes using argon laser. After inducing BRVO a DEX implant was injected into the right eye of each animal while the left control eye was given an identical injection without an implant. Fifteen days after BRVO and DEX implant intervention the retinas were excised and analyzed with tandem mass tag based mass spectrometry. A total of 26 significantly changed proteins were identified. DEX intervention reduced the retinal levels of platelet-derived growth factor receptor-α (PDGFR-α) and vascular endothelial growth factor receptor 2 (VEGFR-2). DEX treatment resulted in increased levels of caveolin-1, peptidyl-prolyl cis-trans isomerase FKBP5 and transgelin. Changes in PDGFR-α and caveolin-1 were confirmed with immunohistochemistry. In BRVO treated with the DEX implant a strong reaction for caveolin-1 was observed in the innermost retinal layers. DEX implant intervention may inhibit PDGF signaling by decreasing the retinal level of PDGFR-α while an increased content of caveolin-1 may help maintain the integrity of the blood-retinal barrier.
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Affiliation(s)
- Lasse Jørgensen Cehofski
- Department of Ophthalmology, Aalborg University Hospital, Aalborg, Denmark; Biomedical Research Laboratory, Aalborg University Hospital, Aalborg, Denmark; Department of Clinical Medicine, Aalborg University, Aalborg, Denmark.
| | - Anders Kruse
- Department of Ophthalmology, Aalborg University Hospital, Aalborg, Denmark
| | - Sigriður Olga Magnusdottir
- Biomedical Research Laboratory, Aalborg University Hospital, Aalborg, Denmark; Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
| | - Alexander Nørgård Alsing
- Department of Ophthalmology, Aalborg University Hospital, Aalborg, Denmark; Biomedical Research Laboratory, Aalborg University Hospital, Aalborg, Denmark; Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
| | | | - Svend Kirkeby
- Department of Odontology, School of Dentistry, University of Copenhagen, Copenhagen, Denmark
| | - Bent Honoré
- Department of Clinical Medicine, Aalborg University, Aalborg, Denmark; Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Henrik Vorum
- Department of Ophthalmology, Aalborg University Hospital, Aalborg, Denmark; Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
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Ruhs S, Nolze A, Hübschmann R, Grossmann C. 30 YEARS OF THE MINERALOCORTICOID RECEPTOR: Nongenomic effects via the mineralocorticoid receptor. J Endocrinol 2017; 234:T107-T124. [PMID: 28348113 DOI: 10.1530/joe-16-0659] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 03/27/2017] [Indexed: 12/12/2022]
Abstract
The mineralocorticoid receptor (MR) belongs to the steroid hormone receptor family and classically functions as a ligand-dependent transcription factor. It is involved in water-electrolyte homeostasis and blood pressure regulation but independent from these effects also furthers inflammation, fibrosis, hypertrophy and remodeling in cardiovascular tissues. Next to genomic effects, aldosterone elicits very rapid actions within minutes that do not require transcription or translation and that occur not only in classical MR epithelial target organs like kidney and colon but also in nonepithelial tissues like heart, vasculature and adipose tissue. Most of these effects can be mediated by classical MR and its crosstalk with different signaling cascades. Near the plasma membrane, the MR seems to be associated with caveolin and striatin as well as with receptor tyrosine kinases like EGFR, PDGFR and IGF1R and G protein-coupled receptors like AT1 and GPER1, which then mediate nongenomic aldosterone effects. GPER1 has also been named a putative novel MR. There is a close interaction and functional synergism between the genomic and the nongenomic signaling so that nongenomic signaling can lead to long-term effects and support genomic actions. Therefore, understanding nongenomic aldosterone/MR effects is of potential relevance for modulating genomic aldosterone effects and may provide additional targets for intervention.
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Affiliation(s)
- Stefanie Ruhs
- Julius Bernstein Institute of PhysiologyMartin Luther University Halle-Wittenberg, Halle, Germany
| | - Alexander Nolze
- Julius Bernstein Institute of PhysiologyMartin Luther University Halle-Wittenberg, Halle, Germany
| | - Ralf Hübschmann
- Julius Bernstein Institute of PhysiologyMartin Luther University Halle-Wittenberg, Halle, Germany
| | - Claudia Grossmann
- Julius Bernstein Institute of PhysiologyMartin Luther University Halle-Wittenberg, Halle, Germany
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Exercise training attenuates dexamethasone-induced hypertension by improving autonomic balance to the heart, sympathetic vascular modulation and skeletal muscle microcirculation. J Hypertens 2016; 34:1967-76. [DOI: 10.1097/hjh.0000000000001032] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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15
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Tao H, Chen ZW, Yang JJ, Shi KH. MicroRNA-29a suppresses cardiac fibroblasts proliferation via targeting VEGF-A/MAPK signal pathway. Int J Biol Macromol 2016; 88:414-23. [PMID: 27060017 DOI: 10.1016/j.ijbiomac.2016.04.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 03/18/2016] [Accepted: 04/04/2016] [Indexed: 10/25/2022]
Abstract
Cardiac fibroblasts proliferation is the most important pathophysiological character of cardiac fibrosis while the underlying mechanisms are still incompletely known. MicroRNAs (miRNAs) regulate gene expression by binding to specific sites. Studies have been indicated that miRNA-29a play a key role in cardiac fibrosis. VEGF-A carries out its functions through MAPK signaling pathway in cardiac fibrosis. Existing proofs predict that the VEGF-A is one of the potential targets of miRNA-29a. We therefore probe the role of miRNA-29a and its latent target VEGF-A during cardiac fibrosis. In our study, miRNA-29a was down-regulated while VEGF-A was up-regulated in cardiac fibrosis tissues. The rat cardiac fibroblasts that were transfected with miRNA-29a inhibitor exhibited low-expression of miRNA-29a, enhanced VEGF-A protein and mRNA expression. Nevertheless, the cardiac fibroblasts transfected with miRNA-29a mimics obtained the opposite expression result. Furthermore, over-expression of miRNA-29a suppresses cardiac fibroblasts proliferation. In conclusion, these results suggested that miRNA-29a suppresses cardiac fibrosis and fibroblasts proliferation via targeting VEGF-A/MAPK signal pathway implicating that miRNA-29a might play a role in the treatment of cardiac fibrosis.
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Affiliation(s)
- Hui Tao
- Department of Cardiothoracic Surgery, The Second Hospital of Anhui Medical University, Hefei 230601, China; Cardiovascular Research Center, Anhui Medical University, Hefei 230601, China
| | - Ze-Wen Chen
- Department of Cardiothoracic Surgery, The Second Hospital of Anhui Medical University, Hefei 230601, China; Cardiovascular Research Center, Anhui Medical University, Hefei 230601, China
| | - Jing-Jing Yang
- Department of Pharmacology, The Second Hospital of Anhui Medical University, Hefei 230601, China
| | - Kai-Hu Shi
- Department of Cardiothoracic Surgery, The Second Hospital of Anhui Medical University, Hefei 230601, China; Cardiovascular Research Center, Anhui Medical University, Hefei 230601, China.
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16
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Igarashi J, Okamoto R, Yamashita T, Hashimoto T, Karita S, Nakai K, Kubota Y, Takata M, Yamaguchi F, Tokuda M, Sakakibara N, Tsukamoto I, Konishi R, Hirano K. A key role of PGC-1α transcriptional coactivator in production of VEGF by a novel angiogenic agent COA-Cl in cultured human fibroblasts. Physiol Rep 2016; 4:e12742. [PMID: 27033444 PMCID: PMC4814893 DOI: 10.14814/phy2.12742] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Revised: 02/23/2016] [Accepted: 02/27/2016] [Indexed: 01/16/2023] Open
Abstract
We previously demonstrated a potent angiogenic effect of a newly developed adenosine-like agent namedCOA-Cl.COA-Cl exerted tube forming activity in human umbilical vein endothelial cells in the presence of normal human dermal fibroblasts (NHDF). We therefore explored whether and howCOA-Cl modulates gene expression and protein secretion ofVEGF, a master regulator of angiogenesis, inNHDFRT-PCRandELISArevealed thatCOA-Cl upregulatedVEGF mRNAexpression and protein secretion inNHDFHIF1α(hypoxia-inducible factor 1α), a transcription factor, andPGC-1α(peroxisome proliferator-activated receptor-γcoactivator-1α), a transcriptional coactivator, are known to positively regulate theVEGFgene. Immunoblot andRT-PCRanalyses revealed thatCOA-Cl markedly upregulated the expression ofPGC-1αprotein andmRNACOA-Cl had no effect on the expression ofHIF1αprotein andmRNAin both hypoxia and normoxia. SilencingPGC-1αgene, but notHIF1αgene, by small interferingRNAattenuated the ability ofCOA-Cl to promoteVEGFsecretion. When an N-terminal fragment ofPGC-1αwas cotransfected with its partner transcription factorERRα(estrogen-related receptor-α) inCOS-7 cells,COA-Cl upregulated the expression of the endogenousVEGF mRNA However,COA-Cl had no effect on the expression ofVEGF, whenHIF1αwas transfected.COA-Cl inducesVEGFgene expression and protein secretion in fibroblasts. The transcriptional coactivatorPGC-1α, in concert withERRα, plays a key role in theCOA-Cl-inducedVEGFproduction.COA-Cl-induced activation ofPGC-1α-ERRα-VEGFpathway has a potential as a novel means for therapeutic angiogenesis.
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Affiliation(s)
- Junsuke Igarashi
- Department of Cardiovascular Physiology, Faculty of Medicine, Kagawa University, Kita-Gun, Japan
| | - Ryuji Okamoto
- Department of Cardiovascular Physiology, Faculty of Medicine, Kagawa University, Kita-Gun, Japan
| | - Tetsuo Yamashita
- Department of Cardiovascular Physiology, Faculty of Medicine, Kagawa University, Kita-Gun, Japan
| | - Takeshi Hashimoto
- Department of Cardiovascular Physiology, Faculty of Medicine, Kagawa University, Kita-Gun, Japan
| | - Sakiko Karita
- Department of Cardiovascular Physiology, Faculty of Medicine, Kagawa University, Kita-Gun, Japan
| | - Kozo Nakai
- Department of Dermatology, Faculty of Medicine, Kagawa University, Kita-Gun, Japan
| | - Yasuo Kubota
- Department of Dermatology, Faculty of Medicine, Kagawa University, Kita-Gun, Japan
| | - Maki Takata
- Department of Pharmaco-Bio-Informatics, Faculty of Medicine, Kagawa University, Kita-Gun, Japan
| | - Fuminori Yamaguchi
- Department of Cell Physiology, Faculty of Medicine, Kagawa University, Kita-Gun, Japan
| | - Masaaki Tokuda
- Department of Cell Physiology, Faculty of Medicine, Kagawa University, Kita-Gun, Japan
| | - Norikazu Sakakibara
- Kagawa School of Pharmaceutical Sciences, Tokushima Bunri University, Sanuki, Japan
| | - Ikuko Tsukamoto
- Department of Pharmaco-Bio-Informatics, Faculty of Medicine, Kagawa University, Kita-Gun, Japan
| | - Ryoji Konishi
- Department of Pharmaco-Bio-Informatics, Faculty of Medicine, Kagawa University, Kita-Gun, Japan
| | - Katsuya Hirano
- Department of Cardiovascular Physiology, Faculty of Medicine, Kagawa University, Kita-Gun, Japan
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17
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Wang L, Du F, Zhang HM, Zhang WJ, Wang HX. Changes in circulating endothelial progenitor cells predict responses of multiple myeloma patients to treatment with bortezomib and dexamethasone. ACTA ACUST UNITED AC 2015; 48:736-42. [PMID: 26108099 PMCID: PMC4541694 DOI: 10.1590/1414-431x20154558] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Accepted: 03/20/2015] [Indexed: 01/21/2023]
Abstract
Four cycles of chemotherapy are required to assess responses of multiple myeloma (MM)
patients. We investigated whether circulating endothelial progenitor cells (cEPCs)
could be a biomarker for predicting patient response in the first cycle of
chemotherapy with bortezomib and dexamethasone, so patients might avoid ineffective
and costly treatments and reduce exposure to unwanted side effects. We measured cEPCs
and stromal cell-derived factor-1α (SDF-1α) in 46 MM patients in the first cycle of
treatment with bortezomib and dexamethasone, and investigated clinical relevance
based on patient response after four 21-day cycles. The mononuclear cell fraction was
analyzed for cEPC by FACS analysis, and SDF-1α was analyzed by ELISA. The study
population was divided into 3 groups according to the response to chemotherapy: good
responders (n=16), common responders (n=12), and non-responders (n=18). There were no
significant differences among these groups at baseline day 1 (P>0.05). cEPC levels
decreased slightly at day 21 (8.2±3.3 cEPCs/μL) vs day 1 (8.4±2.9
cEPCs/μL) in good responders (P>0.05). In contrast, cEPC levels increased
significantly in the other two groups (P<0.05). SDF-1α changes were closely
related to changes in cEPCs. These findings indicate that change in cEPCs at day 21
in the first cycle might be considered a noninvasive biomarker for predicting a later
response, and extent of change could help decide whether to continue this costly
chemotherapy. cEPCs and the SDF-1α/CXCR4 axis are potential therapeutic targets for
improved response and outcomes in MM patients.
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Affiliation(s)
- L Wang
- Tongji Medical College, The Central Hospital of Wuhan, Department of Hematology, Huazhong University of Science and Technology, Wuhan, China
| | - F Du
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - H M Zhang
- Tongji Medical College, The Central Hospital of Wuhan, Department of Hematology, Huazhong University of Science and Technology, Wuhan, China
| | - W J Zhang
- Tongji Medical College, The Central Hospital of Wuhan, Department of Hematology, Huazhong University of Science and Technology, Wuhan, China
| | - H X Wang
- Tongji Medical College, The Central Hospital of Wuhan, Department of Hematology, Huazhong University of Science and Technology, Wuhan, China
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18
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Son YH, Lee SJ, Lee KB, Lee JH, Jeong EM, Chung SG, Park SC, Kim IG. Dexamethasone downregulates caveolin-1 causing muscle atrophy via inhibited insulin signaling. J Endocrinol 2015; 225:27-37. [PMID: 25688118 DOI: 10.1530/joe-14-0490] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Glucocorticoids play a major role in the development of muscle atrophy in various medical conditions, such as cancer, burn injury, and sepsis, by inhibiting insulin signaling. In this study, we report a new pathway in which glucocorticoids reduce the levels of upstream insulin signaling components by downregulating the transcription of the gene encoding caveolin-1 (CAV1), a scaffolding protein present in the caveolar membrane. Treatment with the glucocorticoid dexamethasone (DEX) decreased CAV1 protein and Cav1 mRNA expression, with a concomitant reduction in insulin receptor alpha (IRα) and IR substrate 1 (IRS1) levels in C2C12 myotubes. On the basis of the results of promoter analysis using deletion mutants and site-directed mutagenesis a negative glucocorticoid-response element in the regulatory region of the Cav1 gene was identified, confirming that Cav1 is a glucocorticoid-target gene. Cav1 knockdown using siRNA decreased the protein levels of IRα and IRS1, and overexpression of Cav1 prevented the DEX-induced decrease in IRα and IRS1 proteins, demonstrating a causal role of Cav1 in the inhibition of insulin signaling. Moreover, injection of adenovirus expressing Cav1 into the gastrocnemius muscle of mice prevented DEX-induced atrophy. These results indicate that CAV1 is a critical regulator of muscle homeostasis, linking glucocorticoid signaling to the insulin signaling pathway, thereby providing a novel target for the prevention of glucocorticoid-induced muscle atrophy.
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Affiliation(s)
- Young Hoon Son
- Department of Biochemistry and Molecular BiologyInstitute of Human-Environment Interface BiologyDepartment of Rehabilitation MedicineSeoul National University College of Medicine, 103 Daehak-ro, Jongno-Gu, Seoul 110-799, Korea
| | - Seok-Jin Lee
- Department of Biochemistry and Molecular BiologyInstitute of Human-Environment Interface BiologyDepartment of Rehabilitation MedicineSeoul National University College of Medicine, 103 Daehak-ro, Jongno-Gu, Seoul 110-799, Korea
| | - Ki-Baek Lee
- Department of Biochemistry and Molecular BiologyInstitute of Human-Environment Interface BiologyDepartment of Rehabilitation MedicineSeoul National University College of Medicine, 103 Daehak-ro, Jongno-Gu, Seoul 110-799, Korea
| | - Jin-Haeng Lee
- Department of Biochemistry and Molecular BiologyInstitute of Human-Environment Interface BiologyDepartment of Rehabilitation MedicineSeoul National University College of Medicine, 103 Daehak-ro, Jongno-Gu, Seoul 110-799, Korea
| | - Eui Man Jeong
- Department of Biochemistry and Molecular BiologyInstitute of Human-Environment Interface BiologyDepartment of Rehabilitation MedicineSeoul National University College of Medicine, 103 Daehak-ro, Jongno-Gu, Seoul 110-799, Korea Department of Biochemistry and Molecular BiologyInstitute of Human-Environment Interface BiologyDepartment of Rehabilitation MedicineSeoul National University College of Medicine, 103 Daehak-ro, Jongno-Gu, Seoul 110-799, Korea
| | - Sun Gun Chung
- Department of Biochemistry and Molecular BiologyInstitute of Human-Environment Interface BiologyDepartment of Rehabilitation MedicineSeoul National University College of Medicine, 103 Daehak-ro, Jongno-Gu, Seoul 110-799, Korea
| | - Sang-Chul Park
- Department of Biochemistry and Molecular BiologyInstitute of Human-Environment Interface BiologyDepartment of Rehabilitation MedicineSeoul National University College of Medicine, 103 Daehak-ro, Jongno-Gu, Seoul 110-799, Korea
| | - In-Gyu Kim
- Department of Biochemistry and Molecular BiologyInstitute of Human-Environment Interface BiologyDepartment of Rehabilitation MedicineSeoul National University College of Medicine, 103 Daehak-ro, Jongno-Gu, Seoul 110-799, Korea Department of Biochemistry and Molecular BiologyInstitute of Human-Environment Interface BiologyDepartment of Rehabilitation MedicineSeoul National University College of Medicine, 103 Daehak-ro, Jongno-Gu, Seoul 110-799, Korea
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19
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Schneider N, Gonçalves FDC, Pinto FO, Lopez PLDC, Araújo AB, Pfaffenseller B, Passos EP, Cirne-Lima EO, Meurer L, Lamers ML, Paz AH. Dexamethasone and azathioprine promote cytoskeletal changes and affect mesenchymal stem cell migratory behavior. PLoS One 2015; 10:e0120538. [PMID: 25756665 PMCID: PMC4355407 DOI: 10.1371/journal.pone.0120538] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Accepted: 01/23/2015] [Indexed: 12/13/2022] Open
Abstract
Glucocorticoids and immunosuppressive drugs are commonly used to treat inflammatory disorders, such as inflammatory bowel disease (IBD), and despite a few improvements, the remission of IBD is still difficult to maintain. Due to their immunomodulatory properties, mesenchymal stem cells (MSCs) have emerged as regulators of the immune response, and their viability and activation of their migratory properties are essential for successful cell therapy. However, little is known about the effects of immunosuppressant drugs used in IBD treatment on MSC behavior. The aim of this study was to evaluate MSC viability, nuclear morphometry, cell polarity, F-actin and focal adhesion kinase (FAK) distribution, and cell migratory properties in the presence of the immunosuppressive drugs azathioprine (AZA) and dexamethasone (DEX). After an initial characterization, MSCs were treated with DEX (10 μM) or AZA (1 μM) for 24 hrs or 7 days. Neither drug had an effect on cell viability or nuclear morphometry. However, AZA treatment induced a more elongated cell shape, while DEX was associated with a more rounded cell shape (P < 0.05) with a higher presence of ventral actin stress fibers (P < 0.05) and a decrease in protrusion stability. After 7 days of treatment, AZA improved the cell spatial trajectory (ST) and increased the migration speed (24.35%, P < 0.05, n = 4), while DEX impaired ST and migration speed after 24 hrs and 7 days of treatment (-28.69% and -25.37%, respectively; P < 0.05, n = 4). In conclusion, our data suggest that these immunosuppressive drugs each affect MSC morphology and migratory capacity differently, possibly impacting the success of cell therapy.
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Affiliation(s)
- Natália Schneider
- Embryology and Cell Differentiation Laboratory, Experimental Research Center, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos 2350, CEP 90035-903, Porto Alegre, RS, Brazil
- Graduate Program in Gastroenterology and Hepatology Sciences, Universidade Federal do Rio Grande do Sul, Ramiro Barcelos 2400, CEP 90035-903, Porto Alegre, RS, Brazil
| | - Fabiany da Costa Gonçalves
- Embryology and Cell Differentiation Laboratory, Experimental Research Center, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos 2350, CEP 90035-903, Porto Alegre, RS, Brazil
- Graduate Program in Gastroenterology and Hepatology Sciences, Universidade Federal do Rio Grande do Sul, Ramiro Barcelos 2400, CEP 90035-903, Porto Alegre, RS, Brazil
| | - Fernanda Otesbelgue Pinto
- Embryology and Cell Differentiation Laboratory, Experimental Research Center, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos 2350, CEP 90035-903, Porto Alegre, RS, Brazil
| | - Patrícia Luciana da Costa Lopez
- Experimental Research Center, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos 2350, CEP 90035-903, Porto Alegre, RS, Brazil
| | - Anelise Bergmann Araújo
- Experimental Research Center, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos 2350, CEP 90035-903, Porto Alegre, RS, Brazil
| | - Bianca Pfaffenseller
- Experimental Research Center, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos 2350, CEP 90035-903, Porto Alegre, RS, Brazil
| | - Eduardo Pandolfi Passos
- Embryology and Cell Differentiation Laboratory, Experimental Research Center, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos 2350, CEP 90035-903, Porto Alegre, RS, Brazil
| | - Elizabeth Obino Cirne-Lima
- Embryology and Cell Differentiation Laboratory, Experimental Research Center, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos 2350, CEP 90035-903, Porto Alegre, RS, Brazil
| | - Luíse Meurer
- Graduate Program in Gastroenterology and Hepatology Sciences, Universidade Federal do Rio Grande do Sul, Ramiro Barcelos 2400, CEP 90035-903, Porto Alegre, RS, Brazil
| | - Marcelo Lazzaron Lamers
- Morphological Sciences Department, Health Basic Sciences Institute, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite 500, CEP 90050-170, Porto Alegre, RS, Brazil
| | - Ana Helena Paz
- Embryology and Cell Differentiation Laboratory, Experimental Research Center, Hospital de Clínicas de Porto Alegre, Ramiro Barcelos 2350, CEP 90035-903, Porto Alegre, RS, Brazil
- Graduate Program in Gastroenterology and Hepatology Sciences, Universidade Federal do Rio Grande do Sul, Ramiro Barcelos 2400, CEP 90035-903, Porto Alegre, RS, Brazil
- Morphological Sciences Department, Health Basic Sciences Institute, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite 500, CEP 90050-170, Porto Alegre, RS, Brazil
- * E-mail:
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20
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Wu LQ, Wang RL, Dai YR, Li FQ, Wu HY, Yan SS, Wang LR, Jin LD, Xia XD. Roxithromycin suppresses airway remodeling and modulates the expression of caveolin-1 and phospho-p42/p44MAPK in asthmatic rats. Int Immunopharmacol 2014; 24:247-255. [PMID: 25479721 DOI: 10.1016/j.intimp.2014.11.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 11/07/2014] [Accepted: 11/10/2014] [Indexed: 12/28/2022]
Abstract
Roxithromycin (RXM) expresses anti-asthmatic effects that are separate from its antibiotic activity, but its effects on airway remodeling are still unknown. Here, we evaluated the effects of RXM on airway remodeling and the expression of caveolin-1 and phospho-p42/p44mitogen-activated protein kinase (phospho-p42/p44MAPK) in chronic asthmatic rats. The chronic asthma was induced by ovalbumin/Al(OH)3 sensitization and ovalbumin challenge, RXM (30mg/kg) or dexamethasone (0.5mg/kg) was given before airway challenge initiation. We measured the thickness of bronchial wall and bronchial smooth muscle cell layer to indicate airway remodeling, and caveolin-1 and phospho-p42/p44MAPK expression in lung tissue and airway smooth muscle were detected by immunohistochemistry and western blot analysis, respectively. The results demonstrated that RXM treatment decreased the thickness of bronchial wall and bronchial smooth muscle cell layer, and also downregulated the phospho-p42/p44MAPK expression and upregulated the caveolin-1 expression. The above effects of RXM were similar to dexamethasone. Our results suggested that pretreatment with RXM could suppress airway remodeling and regulate the expression of caveolin-1 and phospho-p42/p44MAPK in chronic asthmatic rats.
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Affiliation(s)
- Li-Qin Wu
- Department of Pulmonary Medicine, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou City, China
| | - Rui-Li Wang
- Department of Anesthesiology, Critical Care, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou City, China
| | - Yuan-Rong Dai
- Department of Pulmonary Medicine, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou City, China.
| | - Feng-Qin Li
- Department of Pulmonary Medicine, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou City, China
| | - Hai-Ya Wu
- Department of Pulmonary Medicine, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou City, China
| | - Sun-Shun Yan
- Department of Pulmonary Medicine, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou City, China
| | - Liang-Rong Wang
- Department of Anesthesiology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou City, China
| | - Li-da Jin
- Department of Anesthesiology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou City, China
| | - Xiao-Dong Xia
- Department of Pulmonary Medicine, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou City, China
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21
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Elfayomy AK, Almasry SM. Effects of a single course versus repeated courses of antenatal corticosteroids on fetal growth, placental morphometry and the differential regulation of vascular endothelial growth factor. J Obstet Gynaecol Res 2014; 40:2135-45. [PMID: 25163747 DOI: 10.1111/jog.12466] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Accepted: 04/02/2014] [Indexed: 11/30/2022]
Abstract
AIM To investigate the impact of antenatal exposure to a single course or repeated courses of dexamethasone (DEX) on neonatal anthropometrics, placental morphometry and potential effect on maternal plasma levels and placental expression of vascular endothelial growth factor (VEGF). METHODS Pregnant women between 27 and 32 weeks of gestation who delivered between 28 and 40 weeks and received a single course (n = 38) or repeated courses (n = 33) of DEX were compared to gestational age-matched controls (n = 30). Maternal blood samples were obtained, and placental biopsy was taken. Area percent of VEGF immunostaining and villous capillarization index were evaluated using image analysis. RESULTS Infants exposed to repeated courses of DEX were significantly associated with decreased birthweight, body length, head circumference and placental weight compared with controls (P = 0.011, P < 0.001, P = 0.004, P < 0.001, respectively) and with the group that received a single course of DEX (P = 0.021, P = 0.020, P = 0.049, P = 0.010, respectively). There was a significant decrease in maternal VEGF plasma levels and percentage of VEGF immunostained area after repeated courses of DEX compared with controls (P < 0.001 and P = 0.001, respectively) or a single course (P = 0.028 and P = 0.002, respectively). Notably, repeated courses of DEX impaired normal increase in villous capillarization index compared with controls or a single course (P = 0.001 and P = 0.041, respectively). CONCLUSION Repeated antenatal courses of DEX compromised fetal and placental growth compared with a single course of DEX, and these effects were potentially mediated by altered maternal plasma levels and placental expression of VEGF with consequent decrease in placental vascularization. Because of continuing uncertainties, several key messages for clinicians are provided.
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Affiliation(s)
- Amr K Elfayomy
- Department of Obstetrics and Gynecology, Taibah University, Almadinah Almunawarah, Saudi Arabia; Department of Obstetrics and Gynecology, Zagazig University, Zagazig, Egypt
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22
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Igarashi J, Hashimoto T, Kubota Y, Shoji K, Maruyama T, Sakakibara N, Takuwa Y, Ujihara Y, Katanosaka Y, Mohri S, Naruse K, Yamashita T, Okamoto R, Hirano K, Kosaka H, Takata M, Konishi R, Tsukamoto I. Involvement of S1P1 receptor pathway in angiogenic effects of a novel adenosine-like nucleic acid analog COA-Cl in cultured human vascular endothelial cells. Pharmacol Res Perspect 2014; 2:e00068. [PMID: 25505610 PMCID: PMC4186426 DOI: 10.1002/prp2.68] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Accepted: 07/11/2014] [Indexed: 12/13/2022] Open
Abstract
COA-Cl (2Cl-C.OXT-A) is a recently developed adenosine-like nucleic acid analog that promotes angiogenesis via the mitogen-activated protein (MAP) kinases ERK1/2. Endothelial S1P1 receptor plays indispensable roles in developmental angiogenesis. In this study, we examined the functions of S1P1 in COA-Cl-induced angiogenic responses. Antagonists for S1P1, W146, and VPC23019, substantially but still partly inhibited the effects of COA-Cl with regard to ERK1/2 activation and tube formation in cultured human umbilical vein endothelial cells (HUVEC). Antagonists for adenosine A1 receptor and purinergic P2Y1 receptor were without effect. Genetic knockdown of S1P1 with siRNA, but not that of S1P3, attenuated COA-Cl-elicited ERK1/2 responses. The signaling properties of COA-Cl showed significant similarities to those of sphingosine 1-phosphate, an endogenous S1P1 ligand, in that both induced responses sensitive to pertussis toxin (Gα i/o inhibitor), 1,2-bis(2-aminophenoxy)ethane-N,N,N',N'-tetraacetic acid tetrakis (acetoxymethyl ester) (BAPTA-AM), (calcium chelator), and PP2 (c-Src tyrosine kinase inhibitor). COA-Cl elevated intracellular Ca2+ concentration and induced tyrosine phosphorylation of p130Cas, a substrate of c-Src, in HUVEC. COA-Cl displaced [3H]S1P in a radioligand-binding competition assay in chem-1 cells overexpressing S1P1. However, COA-Cl activated ERK1/2 in CHO-K1 cells that lack functional S1P1 receptor, suggesting the presence of additional yet-to-be-defined COA-Cl target in these cells. The results thus suggest the major contribution of S1P1 in the angiogenic effects of COA-Cl. However, other mechanism such as that seen in CHO-K1 cells may also be partly involved. Collectively, these findings may lead to refinement of the design of this nucleic acid analog and ultimately to development of small molecule-based therapeutic angiogenesis.
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Affiliation(s)
- Junsuke Igarashi
- Department of Cardiovascular Physiology, Faculty of Medicine, Kagawa University 1750-1 Ikenobe, Miki-Cho, Kita-Gun, Kagawa, 761-0793, Japan
| | - Takeshi Hashimoto
- Department of Cardiovascular Physiology, Faculty of Medicine, Kagawa University 1750-1 Ikenobe, Miki-Cho, Kita-Gun, Kagawa, 761-0793, Japan
| | - Yasuo Kubota
- Department of Dermatology, Faculty of Medicine, Kagawa University 1750-1 Ikenobe, Miki-Cho, Kita-Gun, Kagawa, 761-0793, Japan
| | - Kazuyo Shoji
- Department of Dermatology, Faculty of Medicine, Kagawa University 1750-1 Ikenobe, Miki-Cho, Kita-Gun, Kagawa, 761-0793, Japan
| | - Tokumi Maruyama
- Kagawa School of Pharmaceutical Sciences, Tokushima Bunri University 1314-1 Shido, Sanuki, Kagawa, 769-2193, Japan
| | - Norikazu Sakakibara
- Kagawa School of Pharmaceutical Sciences, Tokushima Bunri University 1314-1 Shido, Sanuki, Kagawa, 769-2193, Japan
| | - Yoh Takuwa
- Department of Cardiovascular Physiology, Kanazawa University School of Medicine 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8640, Japan
| | - Yoshihiro Ujihara
- Department of Physiology, Kawasaki Medical School 577 Matsushima, Kurashiki, 701-0192, Japan
| | - Yuki Katanosaka
- Department of Cardiovascular Physiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University Shitada-Cho 2-5-1, Kita-Ku, Okayama, 700-0914, Japan
| | - Satoshi Mohri
- Department of Physiology, Kawasaki Medical School 577 Matsushima, Kurashiki, 701-0192, Japan
| | - Keiji Naruse
- Department of Cardiovascular Physiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University Shitada-Cho 2-5-1, Kita-Ku, Okayama, 700-0914, Japan
| | - Tetsuo Yamashita
- Department of Cardiovascular Physiology, Faculty of Medicine, Kagawa University 1750-1 Ikenobe, Miki-Cho, Kita-Gun, Kagawa, 761-0793, Japan
| | - Ryuji Okamoto
- Department of Cardiovascular Physiology, Faculty of Medicine, Kagawa University 1750-1 Ikenobe, Miki-Cho, Kita-Gun, Kagawa, 761-0793, Japan
| | - Katsuya Hirano
- Department of Cardiovascular Physiology, Faculty of Medicine, Kagawa University 1750-1 Ikenobe, Miki-Cho, Kita-Gun, Kagawa, 761-0793, Japan
| | - Hiroaki Kosaka
- Department of Cardiovascular Physiology, Faculty of Medicine, Kagawa University 1750-1 Ikenobe, Miki-Cho, Kita-Gun, Kagawa, 761-0793, Japan
| | - Maki Takata
- Department of Pharmaco-Bio-Informatics, Faculty of Medicine, Kagawa University 1750-1 Ikenobe, Miki-Cho, Kita-Gun, Kagawa, 761-0793, Japan
| | - Ryoji Konishi
- Department of Pharmaco-Bio-Informatics, Faculty of Medicine, Kagawa University 1750-1 Ikenobe, Miki-Cho, Kita-Gun, Kagawa, 761-0793, Japan
| | - Ikuko Tsukamoto
- Department of Pharmaco-Bio-Informatics, Faculty of Medicine, Kagawa University 1750-1 Ikenobe, Miki-Cho, Kita-Gun, Kagawa, 761-0793, Japan
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23
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Abstract
The primary adrenal cortical steroid hormones, aldosterone, and the glucocorticoids cortisol and corticosterone, act through the structurally similar mineralocorticoid (MR) and glucocorticoid receptors (GRs). Aldosterone is crucial for fluid, electrolyte, and hemodynamic homeostasis and tissue repair; the significantly more abundant glucocorticoids are indispensable for energy homeostasis, appropriate responses to stress, and limiting inflammation. Steroid receptors initiate gene transcription for proteins that effect their actions as well as rapid non-genomic effects through classical cell signaling pathways. GR and MR are expressed in many tissues types, often in the same cells, where they interact at molecular and functional levels, at times in synergy, others in opposition. Thus the appropriate balance of MR and GR activation is crucial for homeostasis. MR has the same binding affinity for aldosterone, cortisol, and corticosterone. Glucocorticoids activate MR in most tissues at basal levels and GR at stress levels. Inactivation of cortisol and corticosterone by 11β-HSD2 allows aldosterone to activate MR within aldosterone target cells and limits activation of the GR. Under most conditions, 11β-HSD1 acts as a reductase and activates cortisol/corticosterone, amplifying circulating levels. 11β-HSD1 and MR antagonists mitigate inappropriate activation of MR under conditions of oxidative stress that contributes to the pathophysiology of the cardiometabolic syndrome; however, MR antagonists decrease normal MR/GR functional interactions, a particular concern for neurons mediating cognition, memory, and affect.
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Affiliation(s)
- Elise Gomez-Sanchez
- G.V.(Sonny) Montgomery V.A. Medical Center and Department of Medicine, University of Mississippi Medical Center, Jackson, Mississippi
| | - Celso E. Gomez-Sanchez
- G.V.(Sonny) Montgomery V.A. Medical Center and Department of Medicine, University of Mississippi Medical Center, Jackson, Mississippi
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24
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Liu F, Pauluhn J, Trübel H, Wang C. Single high-dose dexamethasone and sodium salicylate failed to attenuate phosgene-induced acute lung injury in rats. Toxicology 2013; 315:17-23. [PMID: 24280380 DOI: 10.1016/j.tox.2013.11.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Revised: 11/03/2013] [Accepted: 11/15/2013] [Indexed: 12/11/2022]
Abstract
Life-threatening acute lung injury potentially occurs following high-level accidental exposures to phosgene gas. This situation was mirrored in rats exposed nose-only at 900-1000 mg phosgene/m(3)min. At this exposure level, previous studies on rats demonstrated sustained reflexively induced cardiopulmonary dysfunction and evidence of vascular fluid redistribution. These findings challenge the currently applied treatment strategies to mitigate the presumed non-cardiogenic lung edema by steroidal or non-steroidal anti-inflammatory drugs. This study investigates whether high doses of curatively administered dexamethasone (DX; 100 mg/kg bw, ip) and sodium salicylate (SS; 200 mg/kg bw, ip), alone or in combination, show efficacy to mitigate the phosgene-induced lung edema. Exhaled nitric oxide (eNO), animal morbidity and mortality, and increased lung weights one day postexposure served as endpoints of lung injury and drug efficacy. When applying this dosing regimen, SS showed minimal (if any) efficacy while DX, alone or in combination with SS, substantially aggravated the emerging lung edema (lung weights) with 40% mortality. The degree of acute lung injury (ALI) was mirrored by increased eNO. Its direct relationship to ALI-severity was evidenced by decreased eNO following NO-synthetase inhibitor administration (aminoguanidine-aerosol) and associated mitigation of ALI. All non-treated phosgene-exposed as well as treated but non-phosgene-exposed rats survived. This experimental evidence suggests that high-dose corticoid treatments may aggravate the pulmonary toxicity of phosgene. Similarly, this outcome supports the supposition that non-inflammatory, cardiogenic and/or neurogenic factors play a role in this type of acute lung injury.
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Affiliation(s)
- Fangfang Liu
- Beijing Institute of Respiratory Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100069, China; Department of Toxicology, Bayer Pharma AG, D-42096 Wuppertal, Germany
| | - Jürgen Pauluhn
- Department of Toxicology, Bayer Pharma AG, D-42096 Wuppertal, Germany.
| | - Hubert Trübel
- Department of Pharmacology Vascular Diseases, Cardiology & Hematology, Bayer Pharma AG, 42096 Wuppertal, Germany
| | - Chen Wang
- Beijing Institute of Respiratory Medicine, Beijing Hospital, Ministry of Health, Beijing 100730, China.
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