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Harrington EO, Kumar A, Leandre V, Wilson ZS, Guarino B, Braza J, Lefort CT, Klinger JR. Natriuretic peptide receptor-C mediates the inhibitory effect of atrial natriuretic peptide on neutrophil recruitment to the lung during acute lung injury. Am J Physiol Lung Cell Mol Physiol 2022; 323:L438-L449. [PMID: 35943160 PMCID: PMC9529260 DOI: 10.1152/ajplung.00477.2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 08/02/2022] [Accepted: 08/02/2022] [Indexed: 01/08/2023] Open
Abstract
Atrial natriuretic peptide (ANP) protects against acute lung injury (ALI), but the receptor that mediates this effect is not known. Transgenic mice with 0 (knockout), 1 (heterozygote), or 2 (wild-type) functional copies of Npr3, the gene that encodes for natriuretic peptide receptor-C (NPR-C), were treated with intravenous infusion of ANP or saline vehicle before oropharyngeal aspiration of Pseudomonas aeruginosa (PA103) or saline vehicle. Lung injury was assessed 4 h following aspiration by measurement of lung wet/dry (W/D) weight, whole lung leukocyte and cytokine levels, and protein, leukocyte, and cytokine concentration in bronchoalveolar lavage fluid (BALF). PA103 induced acute lung injury as evidenced by increases in lung W/D ratio and protein concentration in BALF. The severity of PA103-induced lung injury did not differ between NPR-C genotypes. Treatment with intravenous ANP infusion reduced PA103-induced increases in lung W/D and BALF protein concentration in all three NPRC genotypes. PA103 increased the percentage of leukocytes that were neutrophils and cytokine levels in whole lung and BALF in NPR-C wild-type and knockout mice. This effect was blunted by ANP in wild-type mice but not in the NPR-C knockout mice. NPR-C does not mediate the protective effect of ANP on endothelial cell permeability in settings of PA103-induced injury but may mediate the effect of ANP on inhibition of the recruitment of neutrophils to the lung and thereby attenuate the release of inflammatory cytokines.
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Affiliation(s)
- Elizabeth O Harrington
- Vascular Research Lab, Providence Veterans Administration Medical Center, Providence, Rhode Island
- Division of Pulmonary, Sleep and Critical Care Medicine, Rhode Island Hospital, Providence, Rhode Island
- Warren Alpert Medical School of Brown University, Providence, Rhode Island
| | - Ashok Kumar
- Vascular Research Lab, Providence Veterans Administration Medical Center, Providence, Rhode Island
| | - Verida Leandre
- Pathobiology Graduate Program, Brown University, Providence, Rhode Island
| | - Zachary S Wilson
- Pathobiology Graduate Program, Brown University, Providence, Rhode Island
| | - Brianna Guarino
- Vascular Research Lab, Providence Veterans Administration Medical Center, Providence, Rhode Island
- Division of Pulmonary, Sleep and Critical Care Medicine, Rhode Island Hospital, Providence, Rhode Island
- Warren Alpert Medical School of Brown University, Providence, Rhode Island
| | - Julie Braza
- Vascular Research Lab, Providence Veterans Administration Medical Center, Providence, Rhode Island
| | - Craig T Lefort
- Division of Surgical Research, Department of Surgery, Rhode Island Hospital, Providence, Rhode Island
- Warren Alpert Medical School of Brown University, Providence, Rhode Island
| | - James R Klinger
- Vascular Research Lab, Providence Veterans Administration Medical Center, Providence, Rhode Island
- Division of Pulmonary, Sleep and Critical Care Medicine, Rhode Island Hospital, Providence, Rhode Island
- Warren Alpert Medical School of Brown University, Providence, Rhode Island
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Atrial Natriuretic Peptide (ANP) Suppress λ-Carrageenan-Induced Acute Paw Edema by Modulating Pro-inflammatory Genes in Swiss Albino Mice. Int J Pept Res Ther 2022. [DOI: 10.1007/s10989-022-10444-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Cao X, Ashfaq R, Cheng F, Maharjan S, Li J, Ying G, Hassan S, Xiao H, Yue K, Zhang YS. A Tumor-on-a-Chip System with Bioprinted Blood and Lymphatic Vessel Pair. ADVANCED FUNCTIONAL MATERIALS 2019; 29:1807173. [PMID: 33041741 PMCID: PMC7546431 DOI: 10.1002/adfm.201807173] [Citation(s) in RCA: 94] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Indexed: 05/20/2023]
Abstract
Current in vitro anti-tumor drug screening strategies are insufficiently portrayed lacking true perfusion and draining microcirculation systems, which may post significant limitation in reproducing the transport kinetics of cancer therapeutics explicitly. Herein, we report the fabrication of an improved tumor model consisting of bioprinted hollow blood vessel and lymphatic vessel pair, hosted in a three-dimensional (3D) tumor microenvironment-mimetic hydrogel matrix, termed as the tumor-on-a-chip with bioprinted blood and lymphatic vessel pair (TOC-BBL). The bioprinted blood vessel was perfusable channel with opening on both ends while the bioprinted lymphatic vessel was blinded on one end, both of which were embedded in a hydrogel tumor mass, with vessel permeability individually tunable through optimization of the composition of the bioinks. We demonstrated that systems with different combinations of these bioprinted blood/lymphatic vessels exhibited varying levels of diffusion profiles for biomolecules and anti-cancer drugs. Our TOC-BBL platform mimicking the natural pathway of drug-tumor interactions would have the drug introduced through the perfusable blood vessel, cross the vascular wall into the tumor tissue via diffusion, and eventually drained into the lymphatic vessel along with the carrier flow. Our results suggested that this unique in vitro tumor model containing the bioprinted blood/lymphatic vessel pair may have the capacity of simulating the complex transport mechanisms of certain pharmaceutical compounds inside the tumor microenvironment, potentially providing improved accuracy in future cancer drug screening.
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Affiliation(s)
- Xia Cao
- Division of Engineering in Medicine, Brigham and Women’s Hospital; Department of Medicine, Harvard Medical School Cambridge, MA, 02139; Department of Pharmaceutics and Tissue Engineering, School of Pharmacy, Jiangsu University, Zhenjiang 212013, P.R. China
| | - Ramla Ashfaq
- Division of Engineering in Medicine, Brigham and Women’s Hospital; Department of Medicine, Harvard Medical School Cambridge, MA, 02139; National Center of Excellence in Molecular Biology, University of the Punjab, 87 West Canal Bank Rd, Thokar Niaz Baig, Lahore 53700, Pakistan
| | - Feng Cheng
- Division of Engineering in Medicine, Brigham and Women’s Hospital; Department of Medicine, Harvard Medical School Cambridge, MA, 02139
| | - Sushila Maharjan
- Division of Engineering in Medicine, Brigham and Women’s Hospital; Department of Medicine, Harvard Medical School Cambridge, MA, 02139
| | - Jun Li
- Division of Engineering in Medicine, Brigham and Women’s Hospital; Department of Medicine, Harvard Medical School Cambridge, MA, 02139
| | - Guoliang Ying
- Division of Engineering in Medicine, Brigham and Women’s Hospital; Department of Medicine, Harvard Medical School Cambridge, MA, 02139
| | - Shabir Hassan
- Division of Engineering in Medicine, Brigham and Women’s Hospital; Department of Medicine, Harvard Medical School Cambridge, MA, 02139
| | - Haiyan Xiao
- South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, South China University of Technology, Guangzhou 510640, P.R. China State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, P.R. China
| | - Kan Yue
- South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, South China University of Technology, Guangzhou 510640, P.R. China State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, P.R. China
| | - Yu Shrike Zhang
- Division of Engineering in Medicine, Brigham and Women’s Hospital; Department of Medicine, Harvard Medical School Cambridge, MA, 02139
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Kornej J, Büttner P, Hammer E, Engelmann B, Dinov B, Sommer P, Husser D, Hindricks G, Völker U, Bollmann A. Circulating proteomic patterns in AF related left atrial remodeling indicate involvement of coagulation and complement cascade. PLoS One 2018; 13:e0198461. [PMID: 30496173 PMCID: PMC6264811 DOI: 10.1371/journal.pone.0198461] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 11/12/2018] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Left atrial (LA) electro-anatomical remodeling and diameter increase in atrial fibrillation (AF) indicates disease progression and is associated with poor therapeutic success. Furthermore, AF leads to a hypercoagulable state, which in turn promotes the development of a substrate for AF and disease progression in the experimental setting. The aim of this study was to identify pathways associated with LA remodeling in AF patients using untargeted proteomics approach. METHODS Peripheral blood samples of 48 patients (62±10 years, 63% males, 59% persistent AF) undergoing AF catheter ablation were collected before ablation. 23 patients with left atrial low voltage areas (LVA), defined as <0.5 mV, and 25 patients without LVA were matched for age, gender and CHA2DS2-VASc score. Untargeted proteome analysis was performed using LC-ESI-Tandem mass spectrometry in a label free intensity based workflow. Significantly different abundant proteins were identified and used for pathway analysis and protein-protein interaction analysis. RESULTS Analysis covered 280 non-redundant circulating plasma proteins. The presence of LVA correlated with 30 differentially abundant proteins of coagulation and complement cascade (q<0.05). CONCLUSIONS This pilot proteomic study identified plasma protein candidates associated with electro-anatomical remodeling in AF and pointed towards an imbalance in coagulation and complement pathway, tissue remodeling and inflammation.
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Affiliation(s)
- Jelena Kornej
- Department of Electrophysiology, Heart Center Leipzig, University of Leipzig, Leipzig, Germany
- * E-mail:
| | - Petra Büttner
- Department of Electrophysiology, Heart Center Leipzig, University of Leipzig, Leipzig, Germany
| | - Elke Hammer
- Interfaculty Institute for Genetics and Functional Genomics, University Medicine Greifswald, Greifswald, Germany
- DZHK (German Center for Cardiovascular Research), partner site Greifswald, Greifswald, Germany
| | - Beatrice Engelmann
- Interfaculty Institute for Genetics and Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - Borislav Dinov
- Department of Electrophysiology, Heart Center Leipzig, University of Leipzig, Leipzig, Germany
| | - Philipp Sommer
- Department of Electrophysiology, Heart Center Leipzig, University of Leipzig, Leipzig, Germany
| | - Daniela Husser
- Department of Electrophysiology, Heart Center Leipzig, University of Leipzig, Leipzig, Germany
| | - Gerhard Hindricks
- Department of Electrophysiology, Heart Center Leipzig, University of Leipzig, Leipzig, Germany
| | - Uwe Völker
- Interfaculty Institute for Genetics and Functional Genomics, University Medicine Greifswald, Greifswald, Germany
- DZHK (German Center for Cardiovascular Research), partner site Greifswald, Greifswald, Germany
| | - Andreas Bollmann
- Department of Electrophysiology, Heart Center Leipzig, University of Leipzig, Leipzig, Germany
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Wodicka JR, Morikis VA, Dehghani T, Simon SI, Panitch A. Selectin-Targeting Peptide-Glycosaminoglycan Conjugates Modulate Neutrophil-Endothelial Interactions. Cell Mol Bioeng 2018; 12:121-130. [PMID: 30740185 PMCID: PMC6345733 DOI: 10.1007/s12195-018-0555-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 09/06/2018] [Indexed: 12/24/2022] Open
Abstract
Introduction The glycocalyx is a layer of glycoproteins, proteoglycans and glycosaminoglycans that coats the luminal surface of most blood vessels. It effectively regulates adhesive interactions between leukocytes in flowing blood and the endothelium, where during inflammation, binding to E- and P-selectins and intercellular adhesion molecule-1 (ICAM-1) promotes cell tethering and arrest under shear flow. Methods In this study, we examine the targeting of E-selectin by an engineered peptide moiety bound to a dermatan sulfate backbone. We further investigate this conjugate, denoted as EC-SEAL, by observing its binding to inflamed endothelium, and quantifying its ability to modulate neutrophil–endothelium interactions. Results Binding data reveal that EC-SEAL recognizes domains on E-selectin, and to a lesser degree on P- and L-selectin, and ICAM-1. Further, EC-SEAL increases neutrophil rolling velocity, and decreases neutrophil arrest and migration on inflamed human microvascular endothelial cells under physiologically relevant flow conditions. Conclusions We conclude that simple targeting strategies can mimic glycocalyx function under inflammatory conditions, effectively reducing neutrophil recruitment. Electronic supplementary material The online version of this article (10.1007/s12195-018-0555-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- James R Wodicka
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907 USA.,Indiana University School of Medicine, Indianapolis, IN 46202 USA.,Department of Biomedical Engineering, University of California-Davis, Davis, CA 95616 USA
| | - Vasilios A Morikis
- Department of Biomedical Engineering, University of California-Davis, Davis, CA 95616 USA
| | - Tima Dehghani
- Department of Biomedical Engineering, University of California-Davis, Davis, CA 95616 USA
| | - Scott I Simon
- Department of Biomedical Engineering, University of California-Davis, Davis, CA 95616 USA
| | - Alyssa Panitch
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907 USA.,Department of Biomedical Engineering, University of California-Davis, Davis, CA 95616 USA
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Kornej J, Büttner P, Sommer P, Dagres N, Dinov B, Schumacher K, Bollmann A, Hindricks G. Prediction of electro-anatomical substrate using APPLE score and biomarkers. Europace 2018; 21:54-59. [DOI: 10.1093/europace/euy120] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 04/24/2018] [Indexed: 01/30/2023] Open
Affiliation(s)
- Jelena Kornej
- Department of Electrophysiology, Heart Center, HELIOS Kliniken GmbH, Struempellstrasse 39, Leipzig, Germany
| | - Petra Büttner
- Department of Electrophysiology, Heart Center, HELIOS Kliniken GmbH, Struempellstrasse 39, Leipzig, Germany
| | - Philipp Sommer
- Department of Electrophysiology, Heart Center, HELIOS Kliniken GmbH, Struempellstrasse 39, Leipzig, Germany
| | - Nikolaos Dagres
- Department of Electrophysiology, Heart Center, HELIOS Kliniken GmbH, Struempellstrasse 39, Leipzig, Germany
| | - Borislav Dinov
- Department of Electrophysiology, Heart Center, HELIOS Kliniken GmbH, Struempellstrasse 39, Leipzig, Germany
| | - Katja Schumacher
- Department of Electrophysiology, Heart Center, HELIOS Kliniken GmbH, Struempellstrasse 39, Leipzig, Germany
| | - Andreas Bollmann
- Department of Electrophysiology, Heart Center, HELIOS Kliniken GmbH, Struempellstrasse 39, Leipzig, Germany
| | - Gerhard Hindricks
- Department of Electrophysiology, Heart Center, HELIOS Kliniken GmbH, Struempellstrasse 39, Leipzig, Germany
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The function of TRP channels in neutrophil granulocytes. Pflugers Arch 2018; 470:1017-1033. [PMID: 29717355 DOI: 10.1007/s00424-018-2146-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 04/09/2018] [Accepted: 04/13/2018] [Indexed: 02/07/2023]
Abstract
Neutrophil granulocytes are exposed to widely varying microenvironmental conditions when pursuing their physiological or pathophysiological functions such as fighting invading bacteria or infiltrating cancer tissue. Examples for harsh environmental challenges include among others mechanical shear stress during the recruitment from the vasculature or the hypoxic and acidotic conditions within the tumor microenvironment. Chemokine gradients, reactive oxygen species, pressure, matrix elasticity, and temperature can be added to the list of potential challenges. Transient receptor potential (TRP) channels serve as cellular sensors since they respond to many of the abovementioned environmental stimuli. The present review investigates the role of TRP channels in neutrophil granulocytes and their role in regulating and adapting neutrophil function to microenvironmental cues. Following a brief description of neutrophil functions, we provide an overview of the electrophysiological characterization of neutrophilic ion channels. We then summarize the function of individual TRP channels in neutrophil granulocytes with a focus on TRPC6 and TRPM2 channels. We close the review by discussing the impact of the tumor microenvironment of pancreatic ductal adenocarcinoma (PDAC) on neutrophil granulocytes. Since neutrophil infiltration into PDAC tissue contributes to disease progression, we propose neutrophilic TRP channel blockade as a potential therapeutic option.
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Mezzasoma L, Peirce MJ, Minelli A, Bellezza I. Natriuretic Peptides: The Case of Prostate Cancer. Molecules 2017; 22:molecules22101680. [PMID: 28994721 PMCID: PMC6151559 DOI: 10.3390/molecules22101680] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 09/28/2017] [Accepted: 10/07/2017] [Indexed: 12/16/2022] Open
Abstract
Cardiac natriuretic peptides have long been known to act as main players in the homeostatic control of blood pressure, salt and water balance. However, in the last few decades, new properties have been ascribed to these hormones. A systematic review of English articles using MEDLINE Search terms included prostate cancer, inflammation, cardiac hormones, atrial natriuretic peptide, and brain natriuretic peptide. Most recent publications were selected. Natriuretic peptides are strongly connected to the immune system, whose two branches, innate and adaptive, are finely tuned and organized to kill invaders and repair injured tissues. These peptides control the immune response and act as anti-inflammatory and immune-modulatory agents. In addition, in cancers, natriuretic peptides have anti-proliferative effects by molecular mechanisms based on the inhibition/regulation of several pathways promoting cell proliferation and survival. Nowadays, it is accepted that chronic inflammation is a crucial player in prostate cancer development and progression. In this review, we summarize the current knowledge on the link between prostate cancer and inflammation and the potential use of natriuretic peptides as anti-inflammatory and anticancer agents.
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Affiliation(s)
- Letizia Mezzasoma
- Dipartimento di Medicina Sperimentale, Università di Perugia, 06123 Perugia, Italy.
| | - Matthew J Peirce
- Dipartimento di Medicina Sperimentale, Università di Perugia, 06123 Perugia, Italy.
| | - Alba Minelli
- Dipartimento di Medicina Sperimentale, Università di Perugia, 06123 Perugia, Italy.
| | - Ilaria Bellezza
- Dipartimento di Medicina Sperimentale, Università di Perugia, 06123 Perugia, Italy.
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Tsutsumi J, Minai K, Kawai M, Ogawa K, Inoue Y, Morimoto S, Tanaka T, Nagoshi T, Ogawa T, Yoshimura M. Manifold implications of obesity in ischemic heart disease among Japanese patients according to covariance structure analysis: Low reactivity of B-type natriuretic peptide as an intervening risk factor. PLoS One 2017; 12:e0177327. [PMID: 28481950 PMCID: PMC5421780 DOI: 10.1371/journal.pone.0177327] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Accepted: 04/26/2017] [Indexed: 11/18/2022] Open
Abstract
Background/Objectives Obesity is believed to be one of the major risk factors for cardiovascular disease in Western countries. However, the effects of obesity should be continuously examined in the Japanese population because the average bodily habitus differs among countries. In this study, we collectively examined the significance of obesity and obesity-triggered risk factors including the low reactivity of B-type natriuretic peptide (BNP), for ischemic heart disease (IHD) in Japanese patients. Methods and results The study patients consisted of 1252 subjects (IHD: n = 970; non-IHD: n = 282). Multiple logistic regression analysis revealed that dyslipidemia, hypertension, diabetes, and the low reactivity of BNP were significant risk factors for IHD, but body mass index (BMI) was not. A theoretical path model was proposed by positioning BMI at the top of the hierarchical model. Exploratory factor analysis revealed that BMI did not play a causative role in IHD (P = NS). BMI was causatively linked to other risk factors (P<0.001 for hypertension; P<0.001 for dyslipidemia; P<0.001 for HbA1c; P<0.001 for LogBNP), and these factors played a causative role in IHD (P<0.001 for hypertension; P<0.001 for dyslipidemia; P<0.001 for HbA1c; P<0.001 for LogBNP). The intrinsic power of the low reactivity of BNP induced by high BMI on the promotion of IHD was fairly potent. Conclusion This study demonstrated that obesity per se is not a strong risk factor for IHD in Japanese patients. However, several important risk factors triggered by obesity exhibited a causative role for IHD. The low reactivity of BNP is a substantial risk factor for IHD.
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Affiliation(s)
- Joshi Tsutsumi
- Division of Cardiology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Kosuke Minai
- Division of Cardiology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
- * E-mail:
| | - Makoto Kawai
- Division of Cardiology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Kazuo Ogawa
- Division of Cardiology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Yasunori Inoue
- Division of Cardiology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Satoshi Morimoto
- Division of Cardiology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Toshikazu Tanaka
- Division of Cardiology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Tomohisa Nagoshi
- Division of Cardiology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Takayuki Ogawa
- Division of Cardiology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Michihiro Yoshimura
- Division of Cardiology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
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Curry FRE, Clark JF, Jiang Y, Kim MH, Adamson RH, Simon SI. The role of atrial natriuretic peptide to attenuate inflammation in a mouse skin wound and individually perfused rat mesenteric microvessels. Physiol Rep 2016; 4:4/18/e12968. [PMID: 27670406 PMCID: PMC5037917 DOI: 10.14814/phy2.12968] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Accepted: 08/22/2016] [Indexed: 01/05/2023] Open
Abstract
We tested the hypothesis that the anti‐inflammatory actions of atrial natriuretic peptide (ANP) result from the modulation of leukocyte adhesion to inflamed endothelium and not solely ANP ligation of endothelial receptors to stabilize endothelial barrier function. We measured vascular permeability to albumin and accumulation of fluorescent neutrophils in a full‐thickness skin wound on the flank of LysM‐EGFP mice 24 h after formation. Vascular permeability in individually perfused rat mesenteric microvessels was also measured after leukocytes were washed out of the vessel lumen. Thrombin increased albumin permeability and increased the accumulation of neutrophils. The thrombin‐induced inflammatory responses were attenuated by pretreating the wound with ANP (30 min). During pretreatment ANP did not lower permeability, but transiently increased baseline albumin permeability concomitant with the reduction in neutrophil accumulation. ANP did not attenuate acute increases in permeability to histamine and bradykinin in individually perfused rat microvessels. The hypothesis that anti‐inflammatory actions of ANP depend solely on endothelial responses that stabilize the endothelial barrier is not supported by our results in either individually perfused microvessels in the absence of circulating leukocytes or the more chronic skin wound model. Our results conform to the alternate hypothesis that ANP modulates the interaction of leukocytes with the inflamed microvascular wall of the 24 h wound. Taken together with our previous observations that ANP reduces deformability of neutrophils and their strength of attachment, rolling, and transvascular migration, these observations provide the basis for additional investigations of ANP as an anti‐inflammatory agent to modulate leukocyte–endothelial cell interactions.
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Affiliation(s)
- Fitz-Roy E Curry
- Department of Physiology & Membrane Biology, University of California, Davis, Davis, California
| | - Joyce F Clark
- Department of Physiology & Membrane Biology, University of California, Davis, Davis, California
| | - Yanyan Jiang
- Department of Physiology & Membrane Biology, University of California, Davis, Davis, California
| | - Min-Ho Kim
- Department of Biomedical Engineering, University of California, Davis, Davis, California
| | - Roger H Adamson
- Department of Physiology & Membrane Biology, University of California, Davis, Davis, California
| | - Scott I Simon
- Department of Biomedical Engineering, University of California, Davis, Davis, California
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