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Dunaway LS, Loeb SA, Petrillo S, Tolosano E, Isakson BE. Heme metabolism in nonerythroid cells. J Biol Chem 2024; 300:107132. [PMID: 38432636 PMCID: PMC10988061 DOI: 10.1016/j.jbc.2024.107132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 01/31/2024] [Accepted: 02/23/2024] [Indexed: 03/05/2024] Open
Abstract
Heme is an iron-containing prosthetic group necessary for the function of several proteins termed "hemoproteins." Erythrocytes contain most of the body's heme in the form of hemoglobin and contain high concentrations of free heme. In nonerythroid cells, where cytosolic heme concentrations are 2 to 3 orders of magnitude lower, heme plays an essential and often overlooked role in a variety of cellular processes. Indeed, hemoproteins are found in almost every subcellular compartment and are integral in cellular operations such as oxidative phosphorylation, amino acid metabolism, xenobiotic metabolism, and transcriptional regulation. Growing evidence reveals the participation of heme in dynamic processes such as circadian rhythms, NO signaling, and the modulation of enzyme activity. This dynamic view of heme biology uncovers exciting possibilities as to how hemoproteins may participate in a range of physiologic systems. Here, we discuss how heme is regulated at the level of its synthesis, availability, redox state, transport, and degradation and highlight the implications for cellular function and whole organism physiology.
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Affiliation(s)
- Luke S Dunaway
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Skylar A Loeb
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA; Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Sara Petrillo
- Deptartment Molecular Biotechnology and Health Sciences and Molecular Biotechnology Center "Guido Tarone", University of Torino, Torino, Italy
| | - Emanuela Tolosano
- Deptartment Molecular Biotechnology and Health Sciences and Molecular Biotechnology Center "Guido Tarone", University of Torino, Torino, Italy
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA; Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, Virginia, USA.
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Pavelec CM, Young AP, Luviano HL, Orrell EE, Szagdaj A, Poudel N, Wolpe AG, Thomas SH, Yeudall S, Upchurch CM, Okusa MD, Isakson BE, Wolf MJ, Leitinger N. Pannexin 1 Channels Control Cardiomyocyte Metabolism and Neutrophil Recruitment During Non-Ischemic Heart Failure. bioRxiv 2024:2023.12.29.573679. [PMID: 38234768 PMCID: PMC10793433 DOI: 10.1101/2023.12.29.573679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
Pannexin 1 (PANX1), a ubiquitously expressed ATP release membrane channel, has been shown to play a role in inflammation, blood pressure regulation, and myocardial infarction. However, a possible role of PANX1 in cardiomyocytes in the progression of heart failure has not yet been investigated. We generated a novel mouse line with constitutive deletion of PANX1 in cardiomyocytes (Panx1 MyHC6 ). PANX1 deletion in cardiomyocytes had no effect on unstressed heart function but increased the glycolytic metabolism both in vivo and in vitro . In vitro , treatment of H9c2 cardiomyocytes with isoproterenol led to PANX1-dependent release of ATP and Yo-Pro-1 uptake, as assessed by pharmacological blockade with spironolactone and siRNA-mediated knock-down of PANX1. To investigate non-ischemic heart failure and the preceding cardiac hypertrophy we administered isoproterenol, and we demonstrate that Panx1 MyHC6 mice were protected from systolic and diastolic left ventricle volume increases and cardiomyocyte hypertrophy. Moreover, we found that Panx1 MyHC6 mice showed decreased isoproterenol-induced recruitment of immune cells (CD45 + ), particularly neutrophils (CD11b + , Ly6g + ), to the myocardium. Together these data demonstrate that PANX1 deficiency in cardiomyocytes impacts glycolytic metabolism and protects against cardiac hypertrophy in non-ischemic heart failure at least in part by reducing immune cell recruitment. Our study implies PANX1 channel inhibition as a therapeutic approach to ameliorate cardiac dysfunction in heart failure patients.
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Dunaway LS, Luse MA, Nyshadham S, Bulut G, Alencar GF, Chavkin NW, Cortese-Krott M, Hirschi KK, Isakson BE. Obesogenic diet disrupts tissue-specific mitochondrial gene signatures in the artery and capillary endothelium. Physiol Genomics 2024; 56:113-127. [PMID: 37982169 DOI: 10.1152/physiolgenomics.00109.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 11/03/2023] [Accepted: 11/13/2023] [Indexed: 11/21/2023] Open
Abstract
Endothelial cells (ECs) adapt to the unique needs of their resident tissue and metabolic perturbations, such as obesity. We sought to understand how obesity affects EC metabolic phenotypes, specifically mitochondrial gene expression. We investigated the mesenteric and adipose endothelium because these vascular beds have distinct roles in lipid homeostasis. Initially, we performed bulk RNA sequencing on ECs from mouse adipose and mesenteric vasculatures after a normal chow (NC) diet or high-fat diet (HFD) and found higher mitochondrial gene expression in adipose ECs compared with mesenteric ECs in both NC and HFD mice. Next, we performed single-cell RNA sequencing and categorized ECs as arterial, capillary, venous, or lymphatic. We found mitochondrial genes to be enriched in adipose compared with mesentery under NC conditions in artery and capillary ECs. After HFD, these genes were decreased in adipose ECs, becoming like mesenteric ECs. Transcription factor analysis revealed that peroxisome proliferator-activated receptor-γ (PPAR-γ) had high specificity in NC adipose artery and capillary ECs. These findings were recapitulated in single-nuclei RNA-sequencing data from human visceral adipose. The sum of these findings suggests that mesenteric and adipose arterial ECs metabolize lipids differently, and the transcriptional phenotype of the vascular beds converges in obesity due to downregulation of PPAR-γ in adipose artery and capillary ECs.NEW & NOTEWORTHY Using bulk and single-cell RNA sequencing on endothelial cells from adipose and mesentery, we found that an obesogenic diet induces a reduction in adipose endothelial oxidative phosphorylation gene expression, resulting in a phenotypic convergence of mesenteric and adipose endothelial cells. Furthermore, we found evidence that PPAR-γ drives this phenotypic shift. Mining of human data sets segregated based on body mass index supported these findings. These data point to novel mechanisms by which obesity induces endothelial dysfunction.
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Affiliation(s)
- Luke S Dunaway
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, United States
| | - Melissa A Luse
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, United States
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, Virginia, United States
| | - Shruthi Nyshadham
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, United States
| | - Gamze Bulut
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, United States
| | - Gabriel F Alencar
- Department of Biochemistry and Molecular Genetics, University of Virginia School of Medicine, Charlottesville, Virginia, United States
| | - Nicholas W Chavkin
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, United States
- Department of Cell Biology, University of Virginia School of Medicine, Charlottesville, Virginia, United States
| | - Miriam Cortese-Krott
- Department of Cardiology, Pneumology and Angiology, Heinrich Heine University of Düsseldorf, Düsseldorf, Germany
| | - Karen K Hirschi
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, United States
- Department of Cell Biology, University of Virginia School of Medicine, Charlottesville, Virginia, United States
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, United States
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, Virginia, United States
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Wolpe AG, Luse MA, Baryiames C, Schug WJ, Wolpe JB, Johnstone SR, Dunaway LS, Juśkiewicz ZJ, Loeb SA, Askew Page HR, Chen YL, Sabapathy V, Pavelec CM, Wakefield B, Cifuentes-Pagano E, Artamonov MV, Somlyo AV, Straub AC, Sharma R, Beier F, Barrett EJ, Leitinger N, Pagano PJ, Sonkusare SK, Redemann S, Columbus L, Penuela S, Isakson BE. Pannexin-3 stabilizes the transcription factor Bcl6 in a channel-independent manner to protect against vascular oxidative stress. Sci Signal 2024; 17:eadg2622. [PMID: 38289985 DOI: 10.1126/scisignal.adg2622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 01/05/2024] [Indexed: 02/01/2024]
Abstract
Targeted degradation regulates the activity of the transcriptional repressor Bcl6 and its ability to suppress oxidative stress and inflammation. Here, we report that abundance of endothelial Bcl6 is determined by its interaction with Golgi-localized pannexin 3 (Panx3) and that Bcl6 transcriptional activity protects against vascular oxidative stress. Consistent with data from obese, hypertensive humans, mice with an endothelial cell-specific deficiency in Panx3 had spontaneous systemic hypertension without obvious changes in channel function, as assessed by Ca2+ handling, ATP amounts, or Golgi luminal pH. Panx3 bound to Bcl6, and its absence reduced Bcl6 protein abundance, suggesting that the interaction with Panx3 stabilized Bcl6 by preventing its degradation. Panx3 deficiency was associated with increased expression of the gene encoding the H2O2-producing enzyme Nox4, which is normally repressed by Bcl6, resulting in H2O2-induced oxidative damage in the vasculature. Catalase rescued impaired vasodilation in mice lacking endothelial Panx3. Administration of a newly developed peptide to inhibit the Panx3-Bcl6 interaction recapitulated the increase in Nox4 expression and in blood pressure seen in mice with endothelial Panx3 deficiency. Panx3-Bcl6-Nox4 dysregulation occurred in obesity-related hypertension, but not when hypertension was induced in the absence of obesity. Our findings provide insight into a channel-independent role of Panx3 wherein its interaction with Bcl6 determines vascular oxidative state, particularly under the adverse conditions of obesity.
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Affiliation(s)
- Abigail G Wolpe
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
- Department of Cell Biology, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Melissa A Luse
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, VA 22903, USA
| | | | - Wyatt J Schug
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, VA 22903, USA
| | - Jacob B Wolpe
- Department of Cell Biology, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Scott R Johnstone
- Fralin Biomedical Research Institute at Virginia Tech Carilion School of Medicine, Center for Vascular and Heart Research, Roanoke, VA 24016, USA
- Department of Biological Sciences, Virginia Tech, Blacksburg, VA 24060, USA
| | - Luke S Dunaway
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Zuzanna J Juśkiewicz
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Skylar A Loeb
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, VA 22903, USA
| | - Henry R Askew Page
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Yen-Lin Chen
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Vikram Sabapathy
- Center for Immunity, Inflammation, and Regenerative Medicine (CIIR), University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Caitlin M Pavelec
- Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Brent Wakefield
- Department of Anatomy and Cell Biology, University of Western Ontario, London, ON N6A 5C1, Canada
| | - Eugenia Cifuentes-Pagano
- Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Mykhaylo V Artamonov
- Department of Cell Biology, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Avril V Somlyo
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
- Department of Cell Biology, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Adam C Straub
- Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA 15261, USA
- Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Rahul Sharma
- Center for Immunity, Inflammation, and Regenerative Medicine (CIIR), University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Frank Beier
- Department of Physiology and Pharmacology, University of Western Ontario, London, ON N6A 5C1, Canada
| | - Eugene J Barrett
- Department of Medicine, Division of Endocrinology and Metabolism, University of Virginia School of Medicine, Charlottesville, VA 22903, USA
| | - Norbert Leitinger
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
- Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Patrick J Pagano
- Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Swapnil K Sonkusare
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, VA 22903, USA
| | - Stefanie Redemann
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, VA 22903, USA
- Center for Membrane and Cell Physiology, University of Virginia School of Medicine, Charlottesville, VA 22903, USA
| | - Linda Columbus
- Department of Chemistry, University of Virginia, Charlottesville, VA 22904, USA
| | - Silvia Penuela
- Department of Anatomy and Cell Biology, University of Western Ontario, London, ON N6A 5C1, Canada
- Department of Oncology (Division of Experimental Oncology), Schulich School of Medicine and Dentistry, University of Western Ontario, London, ON N6A 5W9, Canada
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, VA 22903, USA
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Mezache L, Soltisz AM, Johnstone SR, Isakson BE, Veeraraghavan R. Vascular Endothelial Barrier Protection Prevents Atrial Fibrillation by Preserving Cardiac Nanostructure. JACC Clin Electrophysiol 2023; 9:2444-2458. [PMID: 38032579 DOI: 10.1016/j.jacep.2023.10.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 10/20/2023] [Accepted: 10/21/2023] [Indexed: 12/01/2023]
Abstract
BACKGROUND Atrial fibrillation (AF), the most common cardiac arrhythmia, is widely associated with inflammation, vascular dysfunction, and elevated levels of the vascular leak-inducing cytokine, vascular endothelial growth factor (VEGF). Mechanisms underlying AF are poorly understood and current treatments only manage this progressive disease, rather than arresting the underlying pathology. The authors previously identified edema-induced disruption of sodium channel (NaV1.5)-rich intercalated disk nanodomains as a novel mechanism for AF initiation secondary to acute inflammation. Therefore, we hypothesized that protecting the vascular barrier can prevent vascular leak-induced atrial arrhythmias. OBJECTIVES In this study the authors tested the hypothesis that protecting the vascular barrier can prevent vascular leak-induced atrial arrhythmias. They identified 2 molecular targets for vascular barrier protection, connexin43 (Cx43) hemichannels and pannexin-1 (Panx1) channels, which have been implicated in cytokine-induced vascular leak. METHODS The authors undertook in vivo electrocardiography, electron microscopy, and super-resolution light microscopy studies in mice acutely treated with a clinically relevant level of VEGF. RESULTS AF incidence was increased in untreated mice exposed to VEGF relative to vehicle control subjects. VEGF also increased the average number of AF episodes. VEGF shifted NaV1.5 signal to longer distances from Cx43 gap junctions, measured by a distance transformation-based spatial analysis of 3-dimensional confocal images of intercalated disks. Similar effects were observed with NaV1.5 localized near mechanical junctions composed of neural cadherin. Blocking connexin43 hemichannels (αCT11 peptide) or Panx1 channels (PxIL2P peptide) significantly reduced the duration of AF episodes compared with VEGF alone with no treatment. Concurrently, both peptide therapies preserved NaV1.5 distance from gap junctions to control levels and reduced mechanical junction-adjacent intermembrane distance in these hearts. Notably, similar antiarrhythmic efficacy was also achieved with clinically-relevant small-molecule inhibitors of Cx43 and Panx1. CONCLUSIONS These results highlight vascular barrier protection as an antiarrhythmic strategy following inflammation-induced vascular leak.
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Affiliation(s)
- Louisa Mezache
- Department of Biomedical Engineering, College of Engineering, The Ohio State University, Columbus, Ohio, USA
| | - Andrew M Soltisz
- Department of Biomedical Engineering, College of Engineering, The Ohio State University, Columbus, Ohio, USA
| | - Scott R Johnstone
- Fralin Biomedical Research Institute at VTC, Centre for Vascular and Heart Research, Virginia Tech, Roanoke, Virginia, USA; Department of Biological Sciences, Virginia Tech, Blacksburg, Virginia, USA; Virginia Tech Carilion School of Medicine, Department of Surgery, Roanoke, Virginia, USA
| | - Brant E Isakson
- Department of Molecular Physiology and Biological Physics, School of Medicine, University of Virginia, Charlottesville, Virginia, USA; Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Rengasayee Veeraraghavan
- Department of Biomedical Engineering, College of Engineering, The Ohio State University, Columbus, Ohio, USA; The Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, College of Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA; Department of Physiology and Cell Biology, College of Medicine, The Ohio State University, Columbus, Ohio, USA.
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Luse MA, Jackson MG, Juśkiewicz ZJ, Isakson BE. Physiological functions of caveolae in endothelium. Curr Opin Physiol 2023; 35:100701. [PMID: 37873030 PMCID: PMC10588508 DOI: 10.1016/j.cophys.2023.100701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
Endothelial caveolae are essential for a wide range of physiological processes and have emerged as key players in vascular biology. Our understanding of caveolar biology in endothelial cells has expanded dramatically since their discovery revealing critical roles in mechanosensation, signal transduction, eNOS regulation, lymphatic transport, and metabolic disease progression. Furthermore, caveolae are involved in the organization of membrane domains, regulation of membrane fluidity, and endocytosis which contribute to endothelial function and integrity. Additionally, recent advances highlight the impact of caveolae-mediated signaling pathways on vascular homeostasis and pathology. Together, the diverse roles of caveolae discussed here represent a breadth of cellular functions presenting caveolae as a defining feature of endothelial form and function. In light of these new insights, targeting caveolae may hold potential for the development of novel therapeutic strategies to treat a range of vascular diseases.
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Affiliation(s)
- Melissa A. Luse
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine
| | - Madeline G. Jackson
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine
| | - Zuzanna J. Juśkiewicz
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine
| | - Brant E. Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine
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Sveeggen TM, Isakson BE, Straub AC, Bagher P. Bedding as a variable affecting fasting blood glucose and vascular physiology in mice. Am J Physiol Heart Circ Physiol 2023; 325:H338-H345. [PMID: 37389954 PMCID: PMC10435074 DOI: 10.1152/ajpheart.00168.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 06/05/2023] [Accepted: 06/20/2023] [Indexed: 07/02/2023]
Abstract
Rodent husbandry requires careful consideration of environmental factors that may impact colony performance and subsequent physiological studies. Of note, recent reports have suggested corncob bedding may affect a broad range of organ systems. As corncob bedding may contain digestible hemicelluloses, trace sugars, and fiber, we hypothesized that corncob bedding impacts overnight fasting blood glucose and murine vascular function. Here, we compared mice housed on corncob bedding, which were then fasted overnight on either corncob or ALPHA-dri bedding, a virgin paper pulp cellulose alternative. Male and female mice were used from two noninduced, endothelial-specific conditional knockout strains [Cadherin 5-cre/ERT2, floxed hemoglobin-α1 (Hba1fl/fl) or Cadherin 5-cre/ERT2, floxed cytochrome-B5 reductase 3 (CyB5R3fl/fl)] on a C57BL/6J genetic background. After fasting overnight, initial fasting blood glucose was measured, and mice were anesthetized with isoflurane for measurement of blood perfusion via laser speckle contrast analysis using a PeriMed PeriCam PSI NR system. After a 15-min equilibration, the mice were injected intraperitoneally with the α1-adrenergic receptor agonist, phenylephrine (5 mg/kg), or saline, and monitored for changes in blood perfusion. After a 15-min response period, blood glucose was remeasured postprocedure. In both strains, mice fasted on corncob bedding had higher blood glucose than the pulp cellulose group. In the CyB5R3fl/fl strain, mice housed on corncob bedding displayed a significant reduction in phenylephrine-mediated change in perfusion. In the Hba1fl/fl strain, phenylephrine-induced change in perfusion was not different in the corncob group. This work suggests that corncob bedding, in part due to its ingestion by mice, could impact vascular measurements and fasting blood glucose. To promote scientific rigor and improve reproducibility, bedding type should be routinely included in published methods.NEW & NOTEWORTHY This study demonstrates real-time measurement of changes in perfusion to pharmacological treatment using laser speckle contrast analysis. Furthermore, this investigation revealed that fasting mice overnight on corncob bedding has differential effects on vascular function and that there was increased fasting blood glucose in mice fasted on corncob bedding compared with paper pulp cellulose bedding. This highlights the impact that bedding type can have on outcomes in vascular and metabolic research and reinforces the need for thorough and robust reporting of animal husbandry practices.
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Affiliation(s)
- Timothy M Sveeggen
- Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, Nebraska, United States
| | - Brant E Isakson
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, Virginia, United States
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, United States
| | - Adam C Straub
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States
- Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States
| | - Pooneh Bagher
- Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, Nebraska, United States
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Shah SA, Reagan CE, Bresticker JE, Wolpe AG, Good ME, Macal EH, Billcheck HO, Bradley LA, French BA, Isakson BE, Wolf MJ, Epstein FH. Obesity-Induced Coronary Microvascular Disease Is Prevented by iNOS Deletion and Reversed by iNOS Inhibition. JACC Basic Transl Sci 2023; 8:501-514. [PMID: 37325396 PMCID: PMC10264569 DOI: 10.1016/j.jacbts.2022.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 11/02/2022] [Accepted: 11/03/2022] [Indexed: 02/04/2023]
Abstract
Coronary microvascular disease (CMD) caused by obesity and diabetes is major contributor to heart failure with preserved ejection fraction; however, the mechanisms underlying CMD are not well understood. Using cardiac magnetic resonance applied to mice fed a high-fat, high-sucrose diet as a model of CMD, we elucidated the role of inducible nitric oxide synthase (iNOS) and 1400W, an iNOS antagonist, in CMD. Global iNOS deletion prevented CMD along with the associated oxidative stress and diastolic and subclinical systolic dysfunction. The 1400W treatment reversed established CMD and oxidative stress and preserved systolic/diastolic function in mice fed a high-fat, high-sucrose diet. Thus, iNOS may represent a therapeutic target for CMD.
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Affiliation(s)
- Soham A. Shah
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, USA
| | - Claire E. Reagan
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, USA
| | - Julia E. Bresticker
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, USA
| | - Abigail G. Wolpe
- The Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, Virginia, USA
| | - Miranda E. Good
- The Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, Virginia, USA
| | - Edgar H. Macal
- The Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, Virginia, USA
| | - Helen O. Billcheck
- Department of Cardiovascular Medicine, University of Virginia, Charlottesville, Virginia, USA
| | - Leigh A. Bradley
- Department of Cardiovascular Medicine, University of Virginia, Charlottesville, Virginia, USA
| | - Brent A. French
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, USA
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA
| | - Brant E. Isakson
- The Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, Virginia, USA
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA
| | - Matthew J. Wolf
- The Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, Virginia, USA
- Department of Cardiovascular Medicine, University of Virginia, Charlottesville, Virginia, USA
| | - Frederick H. Epstein
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, USA
- The Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, Virginia, USA
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Ruddiman CA, Peckham RG, Luse MA, Chen YL, Kuppusamy M, Corliss BA, Hall J, Lin CJ, Peirce SM, Sonkusare SK, Mecham RP, Wagenseil JE, Isakson BE. Polarized localization of phosphatidylserine in endothelium regulates Kir2.1. JCI Insight 2023; 8:165715. [PMID: 37014698 DOI: 10.1172/jci.insight.165715] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 03/29/2023] [Indexed: 04/05/2023] Open
Abstract
Lipid regulation of ion channels is largely explored using in silico modeling with minimal experimentation in intact tissue; thus, the functional consequences of these predicted lipid-channel interactions within native cellular environments remain elusive. The goal of this study is to investigate how lipid regulation of endothelial Kir2.1, an inwardly rectifying potassium channel that regulates membrane hyperpolarization, contributes to vasodilation in resistance arteries. First, we show phosphatidylserine (PS) localizes to a specific subpopulation of myoendothelial junctions (MEJs), crucial signaling microdomains that regulate vasodilation in resistance arteries, and in silico data has implied PS may compete with PIP2 binding on Kir2.1. We found 83.33% of Kir2.1-MEJs also contained PS, possibly indicating an interaction where PS regulates Kir2.1. Electrophysiology experiments on HEK cells demonstrate PS blocks PIP2 activation of Kir2.1, and addition of exogenous PS blocks PIP2-mediated Kir2.1 vasodilation in resistance arteries. Using a mouse model lacking canonical MEJs in resistance arteries (Elnfl/fl/Cdh5-Cre), PS localization in endothelium was disrupted and PIP2 activation of Kir2.1 was significantly increased. Taken together, our data suggests PS enrichment to MEJs inhibits PIP2-mediated activation of Kir2.1 to tightly regulate changes in arterial diameter, and demonstrates the intracellular lipid localization within endothelium is an important determinant of vascular function.
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Affiliation(s)
- Claire A Ruddiman
- Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, United States of America
| | - Richard G Peckham
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, United States of America
| | - Melissa A Luse
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, United States of America
| | - Yen-Lin Chen
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, United States of America
| | - Maniselvan Kuppusamy
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, United States of America
| | - Bruce A Corliss
- Department of Biomedical Engineering, University of Virginia School of Medicine, Charlottesville, United States of America
| | - Jordan Hall
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, United States of America
| | - Chien-Jung Lin
- Division of Cardiology, St. Louis University School of Medicine, St. Louis, United States of America
| | - Shayn M Peirce
- Department of Biomedical Engineering, University of Virginia School of Medicine, Charlottesville, United States of America
| | - Swapnil K Sonkusare
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, United States of America
| | - Robert P Mecham
- Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, United States of America
| | - Jessica E Wagenseil
- Department of Mechanical Engineering and Materials Science, Washington University School of Medicine, St. Louis, United States of America
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, United States of America
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10
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Koval M, Schug WJ, Isakson BE. Pharmacology of pannexin channels. Curr Opin Pharmacol 2023; 69:102359. [PMID: 36858833 PMCID: PMC10023479 DOI: 10.1016/j.coph.2023.102359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 01/18/2023] [Accepted: 01/29/2023] [Indexed: 03/02/2023]
Abstract
Pannexin channels play fundamental roles in regulating inflammation and have been implicated in many diseases including hypertension, stroke, and neuropathic pain. Thus, the ability to pharmacologically block these channels is a vital component of several therapeutic approaches. Pharmacologic interrogation of model systems also provides a means to discover new roles for pannexins in cell physiology. Here, we review the state of the art for agents that can be used to block pannexin channels, with a focus on chemical pharmaceuticals and peptide mimetics that act on pannexin 1. Guidance on interpreting results obtained with pannexin pharmacologics in experimental systems is discussed, as well as strengths and caveats of different agents, including specificity and feasibility of clinical application.
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Affiliation(s)
- Michael Koval
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA; Department of Cell Biology, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Wyatt J Schug
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Brant E Isakson
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA 22908, USA; Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA.
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11
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Dunaway LS, Billaud M, Macal E, Good ME, Medina CB, Lorenz U, Ravichandran K, Koval M, Isakson BE. Amount of Pannexin 1 in Smooth Muscle Cells Regulates Sympathetic Nerve-Induced Vasoconstriction. Hypertension 2023; 80:416-425. [PMID: 36448464 PMCID: PMC9851955 DOI: 10.1161/hypertensionaha.122.20280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 11/08/2022] [Indexed: 12/05/2022]
Abstract
BACKGROUND Panx1 (pannexin 1) forms high conductance channels that secrete ATP upon stimulation. The role of Panx1 in mediating constriction in response to direct sympathetic nerve stimulation is not known. Additionally, it is unknown how the expression level of Panx1 in smooth muscle cells (SMCs) influences α-adrenergic responses. We hypothesized that the amount of Panx1 in SMCs dictates the levels of sympathetic constriction and blood pressure. METHODS To test this hypothesis, we used genetically modified mouse models enabling expression of Panx1 in vascular cells to be varied. Electrical field stimulation on isolated arteries and blood pressure were assessed. RESULTS Genetic deletion of SMC Panx1 prevented constriction by electric field stimulation of sympathetic nerves. Conversely, overexpression of Panx1 in SMCs using a ROSA26 transgenic model increased sympathetic nerve-mediated constriction. Connexin 43 hemichannel inhibitors did not alter constriction. Next, we evaluated the effects of altered SMC Panx1 expression on blood pressure. To do this, we created mice combining a global Panx1 deletion, with ROSA26-Panx1 under the control of an inducible SMC specific Cre (Myh11). This resulted in mice that could express only human Panx1, only in SMCs. After tamoxifen, these mice had increased blood pressure that was acutely decreased by the Panx1 inhibitor spironolactone. Control mice genetically devoid of Panx1 did not respond to spironolactone. CONCLUSIONS These data suggest Panx1 in SMCs could regulate the extent of sympathetic nerve constriction and blood pressure. The results also show the feasibility humanized Panx1-mouse models to test pharmacological candidates.
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Affiliation(s)
- Luke S. Dunaway
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22903
| | - Marie Billaud
- Department of Surgery, Division of Thoracic and Cardiac Surgery, Brigham and Women’s Hospital, Boston MA, 02115
| | - Edgar Macal
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22903
| | - Miranda E. Good
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston MA 02111
| | - Christopher B. Medina
- Center for Cell Clearance, University of Virginia School of Medicine, Charlottesville, VA 22903
- Department of Microbiology, Immunology and Cancer Biology, University of Virginia School of Medicine, Charlottesville, VA 22903
| | - Ulrike Lorenz
- Department of Microbiology, Immunology and Cancer Biology, University of Virginia School of Medicine, Charlottesville, VA 22903
- Carter Immunology Center, University of Virginia School of Medicine, Charlottesville, VA 22908
| | - Kodi Ravichandran
- Carter Immunology Center, University of Virginia School of Medicine, Charlottesville, VA 22908
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO
| | - Michael Koval
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University School of Medicine, Atlanta, GA 30322
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA 30322
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22903
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA 22903
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12
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Ragland TJ, Heiston EM, Ballantyne A, Stewart NR, La Salvia S, Musante L, Luse MA, Isakson BE, Erdbrügger U, Malin SK. Extracellular vesicles and insulin-mediated vascular function in metabolic syndrome. Physiol Rep 2023; 11:e15530. [PMID: 36597186 PMCID: PMC9810789 DOI: 10.14814/phy2.15530] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Accepted: 11/02/2022] [Indexed: 01/05/2023] Open
Abstract
Metabolic Syndrome (MetS) raises cardiovascular disease risk. Extracellular vesicles (EVs) have emerged as important mediators of insulin sensitivity, although few studies on vascular function exist in humans. We determined the effect of insulin on EVs in relation to vascular function. Adults with MetS (n = 51, n = 9 M, 54.8 ± 1.0 years, 36.4 ± 0.7 kg/m2 , ATPIII: 3.5 ± 0.1 a.u., VO2 max: 22.1 ± 0.6 ml/kg/min) were enrolled in this cross-sectional study. Peripheral insulin sensitivity (M-value) was determined during a euglycemic clamp (40 mU/m2 /min, 90 mg/dl), and blood was collected for EVs (CD105+, CD45+, CD41+, TX+, and CD31+; spectral flow cytometry), inflammation, insulin, and substrates. Central hemodynamics (applanation tonometry) was determined at 0 and 120 min via aortic waveforms. Pressure myography was used to assess insulin-induced arterial vasodilation from mouse 3rd order mesenteric arteries (100-200 μm in diameter) at 0.2, 2 and 20 nM of insulin with EVs from healthy and MetS adults. Adults with MetS had low peripheral insulin sensitivity (2.6 ± 0.2 mg/kg/min) and high HOMA-IR (4.7 ± 0.4 a.u.) plus Adipose-IR (13.0 ± 1.3 a.u.). Insulin decreased total/particle counts (p < 0.001), CD45+ EVs (p = 0.002), AIx75 (p = 0.005) and Pb (p = 0.04), FFA (p < 0.001), total adiponectin (p = 0.006), ICAM (p = 0.002), and VCAM (p = 0.03). Higher M-value related to lower fasted total EVs (r = -0.40, p = 0.004) while higher Adipose-IR associated with higher fasted EVs (r = 0.42, p = 0.004) independent of VAT. Fasting CD105+ and CD45+ derived total EVs correlated with fasting AIx75 (r = 0.29, p < 0.05) and Pb (r = 0.30, p < 0.05). EVs from MetS participants blunted insulin-induced vasodilation in mesenteric arteries compared with increases from healthy controls across insulin doses (all p < 0.005). These data highlight EVs as potentially novel mediators of vascular insulin sensitivity and disease risk.
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Affiliation(s)
- Tristan J. Ragland
- Department of Kinesiology & HealthRutgers UniversityNew BrunswickNew JerseyUSA
| | - Emily M. Heiston
- Department of Internal Medicine, Pauley Heart CenterVirginia Commonwealth UniversityRichmondVirginiaUSA
- Department of KinesiologyUniversity of VirginiaCharlottesvilleVirginiaUSA
| | - Anna Ballantyne
- Department of KinesiologyUniversity of VirginiaCharlottesvilleVirginiaUSA
| | - Nathan R. Stewart
- Department of Kinesiology & HealthRutgers UniversityNew BrunswickNew JerseyUSA
- Department of KinesiologyUniversity of VirginiaCharlottesvilleVirginiaUSA
| | | | - Luca Musante
- School of Veterinary MedicineUniversity of PennsylvaniaPhiladelphiaPennsylvaniaUSA
| | - Melissa A. Luse
- Robert M Berne Cardiovascular Research CenterUniversity of Virginia School of MedicineCharlottesvilleVirginiaUSA
| | - Brant E. Isakson
- Robert M Berne Cardiovascular Research CenterUniversity of Virginia School of MedicineCharlottesvilleVirginiaUSA
- Department of Molecular Physiology and BiophysicsUniversity of Virginia School of MedicineCharlottesvilleVirginiaUSA
| | - Uta Erdbrügger
- Division of Nephrology, Department of MedicineUniversity of VirginiaCharlottesvilleVirginiaUSA
| | - Steven K. Malin
- Department of Kinesiology & HealthRutgers UniversityNew BrunswickNew JerseyUSA
- Department of KinesiologyUniversity of VirginiaCharlottesvilleVirginiaUSA
- Division of Endocrinology, Metabolism & NutritionDepartment of MedicineNew BrunswickNew JerseyUSA
- The New Jersey Institute for Food, Nutrition and HealthRutgers UniversityNew BrunswickNew JerseyUSA
- Institute of Translational Medicine and ScienceRutgers UniversityNew BrunswickNew JerseyUSA
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13
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Baldwin SN, Forrester EA, Homer NZM, Andrew R, Barrese V, Stott JB, Isakson BE, Albert AP, Greenwood IA. Marked oestrous cycle-dependent regulation of rat arterial K V 7.4 channels driven by GPER1. Br J Pharmacol 2023; 180:174-193. [PMID: 36085551 PMCID: PMC10091994 DOI: 10.1111/bph.15947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 06/21/2022] [Accepted: 07/20/2022] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND AND PURPOSE Kcnq-encoded KV 7 channels (termed KV 7.1-5) regulate vascular smooth muscle cell (VSMC) contractility at rest and as targets of receptor-mediated responses. However, the current data are mostly derived from males. Considering the known effects of sex, the oestrous cycle and sex hormones on vascular reactivity, here we have characterised the molecular and functional properties of KV 7 channels from renal and mesenteric arteries from female Wistar rats separated into di-oestrus and met-oestrus (F-D/M) and pro-oestrus and oestrus (F-P/E). EXPERIMENTAL APPROACH RT-qPCR, immunocytochemistry, proximity ligation assay and wire myography were performed in renal and mesenteric arteries. Circulating sex hormone concentrations were determined by liquid chromatography-tandem mass spectrometry. Whole-cell electrophysiology was undertaken on cells expressing KV 7.4 channels in association with G-protein-coupled oestrogen receptor 1 (GPER1). KEY RESULTS The KV 7.2-5 activators S-1 and ML213 and the pan-KV 7 inhibitor linopirdine were more effective in arteries from F-D/M compared with F-P/E animals. In VSMCs isolated from F-P/E rats, exploratory evidence indicates reduced membrane abundance of KV 7.4 but not KV 7.1, KV 7.5 and Kcne4 when compared with cells from F-D/M. Plasma oestradiol was higher in F-P/E compared with F-D/M, and progesterone showed the converse pattern. Oestradiol/GPER1 agonist G-1 diminished KV 7.4 encoded currents and ML213 relaxations and reduced the membrane abundance of KV 7.4 and interaction between KV 7.4 and heat shock protein 90 (HSP90), in arteries from F-D/M but not F-P/E. CONCLUSIONS AND IMPLICATIONS GPER1 signalling decreased KV 7.4 membrane abundance in conjunction with diminished interaction with HSP90, giving rise to a 'pro-contractile state'.
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Affiliation(s)
- Samuel N. Baldwin
- Vascular Biology Research Centre, Institute of Molecular and Clinical SciencesSt George's University of LondonLondonUK
| | - Elizabeth A. Forrester
- Vascular Biology Research Centre, Institute of Molecular and Clinical SciencesSt George's University of LondonLondonUK
| | - Natalie Z. M. Homer
- Mass Spectrometry Core Laboratory, Edinburgh Clinical Research Facility, Queen's Medical Research InstituteUniversity of EdinburghEdinburghUK
| | - Ruth Andrew
- Mass Spectrometry Core Laboratory, Edinburgh Clinical Research Facility, Queen's Medical Research InstituteUniversity of EdinburghEdinburghUK
- BHF Centre for Cardiovascular Science, Queen's Medical Research InstituteUniversity of EdinburghEdinburghUK
| | - Vincenzo Barrese
- Department of Neuroscience, Reproductive Sciences and DentistryUniversity of Naples Federico IINaplesItaly
| | - Jennifer B. Stott
- Vascular Biology Research Centre, Institute of Molecular and Clinical SciencesSt George's University of LondonLondonUK
| | - Brant E. Isakson
- Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research CentreUniversity of Virginia School of MedicineCharlottesvilleVirginiaUSA
| | - Anthony P. Albert
- Vascular Biology Research Centre, Institute of Molecular and Clinical SciencesSt George's University of LondonLondonUK
| | - Iain A. Greenwood
- Vascular Biology Research Centre, Institute of Molecular and Clinical SciencesSt George's University of LondonLondonUK
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14
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Chu PL, Gigliotti JC, Cechova S, Bodonyi-Kovacs G, Wang YT, Chen L, Wassertheil-Smoller S, Cai J, Isakson BE, Franceschini N, Le TH. Collectrin ( Tmem27) deficiency in proximal tubules causes hypertension in mice and a TMEM27 variant associates with blood pressure in males in a Latino cohort. Am J Physiol Renal Physiol 2023; 324:F30-F42. [PMID: 36264884 PMCID: PMC9762972 DOI: 10.1152/ajprenal.00176.2022] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 09/07/2022] [Accepted: 09/23/2022] [Indexed: 02/04/2023] Open
Abstract
Collectrin (Tmem27), an angiotensin-converting enzyme 2 homologue, is a chaperone of amino acid transporters in the kidney and endothelium. Global collectrin knockout (KO) mice have hypertension, endothelial dysfunction, exaggerated salt sensitivity, and diminished renal blood flow. This phenotype is associated with altered nitric oxide and superoxide balance and increased proximal tubule (PT) Na+/H+ exchanger isoform 3 (NHE3) expression. Collectrin is located on the X chromosome where genome-wide association population studies have largely been excluded. In the present study, we generated PT-specific collectrin KO (PT KO) mice to determine the precise contribution of PT collectrin in blood pressure homeostasis. We also examined the association of human TMEM27 single-nucleotide polymorphisms with blood pressure traits in 11,926 Hispanic Community Health Study/Study of Latinos (HCHS/SOL) Hispanic/Latino participants. PT KO mice exhibited hypertension, and this was associated with increased baseline NHE3 expression and diminished lithium excretion. However, PT KO mice did not display exaggerated salt sensitivity or a reduction in renal blood flow compared with control mice. Furthermore, PT KO mice exhibited enhanced endothelium-mediated dilation, suggesting a compensatory response to systemic hypertension induced by deficiency of collectrin in the PT. In HCHS/SOL participants, we observed sex-specific single-nucleotide polymorphism associations with diastolic blood pressure. In conclusion, loss of collectrin in the PT is sufficient to induce hypertension, at least in part, through activation of NHE3. Importantly, our model supports the notion that altered renal blood flow may be a determining factor for salt sensitivity. Further studies are needed to investigate the role of the TMEM27 locus on blood pressure and salt sensitivity in humans.NEW & NOTEWORTHY The findings of our study are significant in several ways: 1) loss of an amino acid chaperone in the proximal tubule is sufficient to cause hypertension, 2) the results in global and proximal tubule-specific collectrin knockout mice support the notion that vascular dysfunction is required for salt sensitivity or that impaired renal tubule function causes hypertension but is not sufficient to cause salt sensitivity, and 3) our study is the first to implicate a role of collectrin in human hypertension.
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Affiliation(s)
- Pei-Lun Chu
- Division of Nephrology, Fu Jen Catholic University Hospital, and School of Medicine, College of Medicine, Fu Jen Catholic University, New Taipei City, Taiwan
| | - Joseph C Gigliotti
- Department of Integrated Physiology and Pharmacology, Liberty University College of Osteopathic Medicine, Lynchburg, Virginia
| | - Sylvia Cechova
- Division of Nephrology, Department of Medicine, University of Virginia Health System, Charlottesville, Virginia
| | - Gabor Bodonyi-Kovacs
- Division of Nephrology, Department of Medicine, University of Virginia Health System, Charlottesville, Virginia
| | - Yves T Wang
- Division of Nephrology, Department of Medicine, University of Rochester Medical Center Rochester, Rochester, New York
| | - Luojing Chen
- Division of Nephrology, Department of Medicine, University of Rochester Medical Center Rochester, Rochester, New York
| | - Sylvia Wassertheil-Smoller
- Department of Epidemiology and Population Health, Albert Einstein College of Medicine, Bronx, New York
- Department of Pediatrics, Albert Einstein College of Medicine, Bronx, New York
| | - Jianwen Cai
- Department of Biostatistics, University of North Carolina, Chapel Hill, North Carolina
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research Center and Department of Molecular Physiology and Biophysics, University of Virginia Health System, Charlottesville, Virginia
| | - Nora Franceschini
- Department of Epidemiology, University of North Carolina, Chapel Hill, North Carolina
| | - Thu H Le
- Division of Nephrology, Department of Medicine, University of Rochester Medical Center Rochester, Rochester, New York
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15
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Luse MA, Krüger N, Good ME, Biwer LA, Serbulea V, Salamon A, Deaton RA, Leitinger N, Gödecke A, Isakson BE. Smooth muscle cell FTO regulates contractile function. Am J Physiol Heart Circ Physiol 2022; 323:H1212-H1220. [PMID: 36306211 PMCID: PMC9678421 DOI: 10.1152/ajpheart.00427.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 10/24/2022] [Accepted: 10/24/2022] [Indexed: 12/14/2022]
Abstract
The fat mass and obesity gene (FTO) is a N6-methyladenosine RNA demethylase that was initially linked by Genome-wide association studies to increased rates of obesity. Subsequent studies have revealed multiple mass-independent effects of the gene, including cardiac myocyte contractility. We created a mouse with a conditional and inducible smooth muscle cell deletion of Fto (Myh11 Cre+ Ftofl/fl) and did not observe any changes in mouse body mass or mitochondrial metabolism. However, the mice had significantly decreased blood pressure (hypotensive), despite increased heart rate and sodium, and significantly increased plasma renin. Remarkably, the third-order mesenteric arteries from these mice had almost no myogenic tone or capacity to constrict to smooth muscle depolarization or phenylephrine. Microarray analysis from Fto-/--isolated smooth muscle cells demonstrated a significant decrease in serum response factor (Srf) and the downstream effectors Acta2, Myocd, and Tagln; this was confirmed in cultured human coronary arteries with FTO siRNA. We conclude Fto is an important component to the contractility of smooth muscle cells.NEW & NOTEWORTHY We show a key role for the fat mass obesity (FTO) gene in regulating smooth muscle contractility, possibly by methylation of serum response factor (Srf).
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Affiliation(s)
- Melissa A Luse
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Nenja Krüger
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia
- Institute of Animal Developmental and Molecular Biology, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Miranda E Good
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston, Massachusetts
| | - Lauren A Biwer
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston, Massachusetts
| | - Vlad Serbulea
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Anita Salamon
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Rebecca A Deaton
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Norbert Leitinger
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia
- Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Axel Gödecke
- Institute of Animal Developmental and Molecular Biology, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, Virginia
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16
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Keller TCS, Lechauve C, Keller AS, Broseghini-Filho GB, Butcher JT, Askew Page HR, Islam A, Tan ZY, DeLalio LJ, Brooks S, Sharma P, Hong K, Xu W, Padilha AS, Ruddiman CA, Best AK, Macal E, Kim-Shapiro DB, Christ G, Yan Z, Cortese-Krott MM, Ricart K, Patel R, Bender TP, Sonkusare SK, Weiss MJ, Ackerman H, Columbus L, Isakson BE. Endothelial alpha globin is a nitrite reductase. Nat Commun 2022; 13:6405. [PMID: 36302779 PMCID: PMC9613979 DOI: 10.1038/s41467-022-34154-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Accepted: 10/04/2022] [Indexed: 01/29/2023] Open
Abstract
Resistance artery vasodilation in response to hypoxia is essential for matching tissue oxygen and demand. In hypoxia, erythrocytic hemoglobin tetramers produce nitric oxide through nitrite reduction. We hypothesized that the alpha subunit of hemoglobin expressed in endothelium also facilitates nitrite reduction proximal to smooth muscle. Here, we create two mouse strains to test this: an endothelial-specific alpha globin knockout (EC Hba1Δ/Δ) and another with an alpha globin allele mutated to prevent alpha globin's inhibitory interaction with endothelial nitric oxide synthase (Hba1WT/Δ36-39). The EC Hba1Δ/Δ mice had significantly decreased exercise capacity and intracellular nitrite consumption in hypoxic conditions, an effect absent in Hba1WT/Δ36-39 mice. Hypoxia-induced vasodilation is significantly decreased in arteries from EC Hba1Δ/Δ, but not Hba1WT/Δ36-39 mice. Hypoxia also does not lower blood pressure in EC Hba1Δ/Δ mice. We conclude the presence of alpha globin in resistance artery endothelium acts as a nitrite reductase providing local nitric oxide in response to hypoxia.
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Affiliation(s)
- T C Stevenson Keller
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, USA
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Christophe Lechauve
- Department of Hematology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Alexander S Keller
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, USA
- Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Gilson Brás Broseghini-Filho
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, USA
- Department of Physiological Sciences, Federal University of Espirito Santo, Vitória, Brazil
| | - Joshua T Butcher
- Department of Physiological Sciences, College of Veterinary Medicine, Oklahoma State University, Stillwater, OK, USA
| | - Henry R Askew Page
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Aditi Islam
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Zhe Yin Tan
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Leon J DeLalio
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, USA
- Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Steven Brooks
- Physiology Unit, Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA
| | - Poonam Sharma
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA, USA
| | - Kwangseok Hong
- Department of Physical Education, College of Education, Chung-Ang University, Seoul, South Korea
| | - Wenhao Xu
- Transgenic Mouse Facility, Department of Medicine, University of Virginia School of Medicine, Charlottesville, VA, USA
| | | | - Claire A Ruddiman
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, USA
- Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Angela K Best
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Edgar Macal
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Daniel B Kim-Shapiro
- Department of Physics, Translational Science Center, Wake Forest University, Winston-Salem, NC, USA
| | - George Christ
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA, USA
| | - Zhen Yan
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Miriam M Cortese-Krott
- Cardiovascular Research Laboratory, Division of Cardiology, Pneumology and Angiology, Medical Faculty, Heinrich Heine University, Düsseldorf, Germany
| | - Karina Ricart
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Rakesh Patel
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Timothy P Bender
- Department of Microbiology, Immunology and Cancer, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Swapnil K Sonkusare
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, USA
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Mitchell J Weiss
- Department of Hematology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Hans Ackerman
- Physiology Unit, Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA
| | - Linda Columbus
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA, USA
- Department of Chemistry, University of Virginia, Charlottesville, VA, USA
| | - Brant E Isakson
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, USA.
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA, USA.
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17
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Granade ME, Hargett SR, Lank DS, Lemke MC, Luse MA, Isakson BE, Bochkis IM, Linden J, Harris TE. Feeding desensitizes A1 adenosine receptors in adipose through FOXO1-mediated transcriptional regulation. Mol Metab 2022; 63:101543. [PMID: 35811051 PMCID: PMC9304768 DOI: 10.1016/j.molmet.2022.101543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 06/24/2022] [Accepted: 07/04/2022] [Indexed: 12/03/2022] Open
Abstract
OBJECTIVE Adipose tissue is a critical regulator of energy balance that must rapidly shift its metabolism between fasting and feeding to maintain homeostasis. Adenosine has been characterized as an important regulator of adipocyte metabolism primarily through its actions on A1 adenosine receptors (A1R). We sought to understand the role A1R plays specifically in adipocytes during fasting and feeding to regulate glucose and lipid metabolism. METHODS We used Adora1 floxed mice with an inducible, adiponectin-Cre to generate FAdora1-/- mice, where F designates a fat-specific deletion of A1R. We used these FAdora1-/- mice along with specific agonists and antagonists of A1R to investigate changes in adenosine signaling within adipocytes between the fasted and fed state. RESULTS We found that the adipose tissue response to adenosine is not static, but changes dynamically according to nutrient conditions through the insulin-Akt-FOXO1 axis. We show that under fasted conditions, FAdora1-/- mice had impairments in the suppression of lipolysis by insulin on normal chow and impaired glucose tolerance on high-fat diet. FAdora1-/- mice also exhibited a higher lipolytic response to isoproterenol than WT controls when fasted, however this difference was lost after a 4-hour refeeding period. We demonstrate that FOXO1 binds to the A1R promoter, and refeeding leads to a rapid downregulation of A1R transcript and desensitization of adipocytes to A1R agonism. Obesity also desensitizes adipocyte A1R, and this is accompanied by a disruption of cyclical changes in A1R transcription between fasting and refeeding. CONCLUSIONS We propose that FOXO1 drives high A1R expression under fasted conditions to limit excess lipolysis during stress and augment insulin action upon feeding. Subsequent downregulation of A1R under fed conditions leads to desensitization of these receptors in adipose tissue. This regulation of A1R may facilitate reentrance into the catabolic state upon fasting.
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Affiliation(s)
- Mitchell E Granade
- Department of Pharmacology, University of Virginia, Charlottesville, VA, USA
| | - Stefan R Hargett
- Department of Pharmacology, University of Virginia, Charlottesville, VA, USA
| | - Daniel S Lank
- Department of Pharmacology, University of Virginia, Charlottesville, VA, USA
| | - Michael C Lemke
- Department of Pharmacology, University of Virginia, Charlottesville, VA, USA
| | - Melissa A Luse
- Department of Molecular Physiology and Biophysics, University of Virginia, Charlottesville, VA, USA
| | - Brant E Isakson
- Department of Molecular Physiology and Biophysics, University of Virginia, Charlottesville, VA, USA
| | - Irina M Bochkis
- Department of Pharmacology, University of Virginia, Charlottesville, VA, USA
| | - Joel Linden
- Department of Medicine, Center for Immunity, Inflammation and Regenerative Medicine, University of Virginia, Charlottesville, VA, USA
| | - Thurl E Harris
- Department of Pharmacology, University of Virginia, Charlottesville, VA, USA.
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18
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King DR, Sedovy MW, Eaton X, Dunaway LS, Good ME, Isakson BE, Johnstone SR. Cell-To-Cell Communication in the Resistance Vasculature. Compr Physiol 2022; 12:3833-3867. [PMID: 35959755 DOI: 10.1002/cphy.c210040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The arterial vasculature can be divided into large conduit arteries, intermediate contractile arteries, resistance arteries, arterioles, and capillaries. Resistance arteries and arterioles primarily function to control systemic blood pressure. The resistance arteries are composed of a layer of endothelial cells oriented parallel to the direction of blood flow, which are separated by a matrix layer termed the internal elastic lamina from several layers of smooth muscle cells oriented perpendicular to the direction of blood flow. Cells within the vessel walls communicate in a homocellular and heterocellular fashion to govern luminal diameter, arterial resistance, and blood pressure. At rest, potassium currents govern the basal state of endothelial and smooth muscle cells. Multiple stimuli can elicit rises in intracellular calcium levels in either endothelial cells or smooth muscle cells, sourced from intracellular stores such as the endoplasmic reticulum or the extracellular space. In general, activation of endothelial cells results in the production of a vasodilatory signal, usually in the form of nitric oxide or endothelial-derived hyperpolarization. Conversely, activation of smooth muscle cells results in a vasoconstriction response through smooth muscle cell contraction. © 2022 American Physiological Society. Compr Physiol 12: 1-35, 2022.
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Affiliation(s)
- D Ryan King
- Fralin Biomedical Research Institute at Virginia Tech Carilion, Center for Vascular and Heart Research, Virginia Tech, Roanoke, Virginia, USA
| | - Meghan W Sedovy
- Fralin Biomedical Research Institute at Virginia Tech Carilion, Center for Vascular and Heart Research, Virginia Tech, Roanoke, Virginia, USA.,Translational Biology, Medicine, and Health Graduate Program, Virginia Tech, Blacksburg, Virginia, USA
| | - Xinyan Eaton
- Fralin Biomedical Research Institute at Virginia Tech Carilion, Center for Vascular and Heart Research, Virginia Tech, Roanoke, Virginia, USA
| | - Luke S Dunaway
- Robert M. Berne Cardiovascular Research Centre, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Miranda E Good
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston, Massachusetts, USA
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research Centre, University of Virginia School of Medicine, Charlottesville, Virginia, USA.,Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Scott R Johnstone
- Fralin Biomedical Research Institute at Virginia Tech Carilion, Center for Vascular and Heart Research, Virginia Tech, Roanoke, Virginia, USA.,Department of Biological Sciences, Virginia Tech, Blacksburg, Virginia, USA
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19
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Cortese-Krott MM, Suvorava T, Leo F, Heuser SK, LoBue A, Li J, Becher S, Schneckmann R, Srivrastava T, Erkens R, Wolff G, Schmitt JP, Grandoch M, Lundberg JO, Pernow J, Isakson BE, Weitzberg E, Kelm M. Red blood cell eNOS is cardioprotective in acute myocardial infarction. Redox Biol 2022; 54:102370. [PMID: 35759945 PMCID: PMC9241051 DOI: 10.1016/j.redox.2022.102370] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 06/07/2022] [Accepted: 06/13/2022] [Indexed: 11/19/2022] Open
Abstract
Red blood cells (RBCs) were shown to transport and release nitric oxide (NO) bioactivity and carry an endothelial NO synthase (eNOS). However, the pathophysiological significance of RBC eNOS for cardioprotection in vivo is unknown. Here we aimed to analyze the role of RBC eNOS in the regulation of coronary blood flow, cardiac performance, and acute myocardial infarction (AMI) in vivo. To specifically distinguish the role of RBC eNOS from the endothelial cell (EC) eNOS, we generated RBC- and EC-specific knock-out (KO) and knock-in (KI) mice by Cre-induced inactivation or reactivation of eNOS. We found that RBC eNOS KO mice had fully preserved coronary dilatory responses and LV function. Instead, EC eNOS KO mice had a decreased coronary flow response in isolated perfused hearts and an increased LV developed pressure in response to elevated arterial pressure, while stroke volume was preserved. Interestingly, RBC eNOS KO showed a significantly increased infarct size and aggravated LV dysfunction with decreased stroke volume and cardiac output. This is consistent with reduced NO bioavailability and oxygen delivery capacity in RBC eNOS KOs. Crucially, RBC eNOS KI mice had decreased infarct size and preserved LV function after AMI. In contrast, EC eNOS KO and EC eNOS KI had no differences in infarct size or LV dysfunction after AMI, as compared to the controls. These data demonstrate that EC eNOS controls coronary vasodilator function, but does not directly affect infarct size, while RBC eNOS limits infarct size in AMI. Therefore, RBC eNOS signaling may represent a novel target for interventions in ischemia/reperfusion after myocardial infarction.
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Affiliation(s)
- Miriam M Cortese-Krott
- Myocardial Infarction Research Laboratory, Department of Cardiology, Pulmonology, and Angiology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany; Cardiovascular Research Laboratory, Department of Cardiology Pneumology and Angiology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany; Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden.
| | - Tatsiana Suvorava
- Myocardial Infarction Research Laboratory, Department of Cardiology, Pulmonology, and Angiology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany; Cardiovascular Research Laboratory, Department of Cardiology Pneumology and Angiology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Francesca Leo
- Myocardial Infarction Research Laboratory, Department of Cardiology, Pulmonology, and Angiology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Sophia K Heuser
- Myocardial Infarction Research Laboratory, Department of Cardiology, Pulmonology, and Angiology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Anthea LoBue
- Myocardial Infarction Research Laboratory, Department of Cardiology, Pulmonology, and Angiology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Junjie Li
- Myocardial Infarction Research Laboratory, Department of Cardiology, Pulmonology, and Angiology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Stefanie Becher
- Cardiovascular Research Laboratory, Department of Cardiology Pneumology and Angiology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Rebekka Schneckmann
- Department of Pharmacology and Clinical Pharmacology, Medical Faculty, Heinrich-Heine-University, Germany
| | - Tanu Srivrastava
- Department of Pharmacology and Clinical Pharmacology, Medical Faculty, Heinrich-Heine-University, Germany
| | - Ralf Erkens
- Cardiovascular Research Laboratory, Department of Cardiology Pneumology and Angiology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Georg Wolff
- Cardiovascular Research Laboratory, Department of Cardiology Pneumology and Angiology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Joachim P Schmitt
- Department of Pharmacology and Clinical Pharmacology, Medical Faculty, Heinrich-Heine-University, Germany
| | - Maria Grandoch
- Department of Pharmacology and Clinical Pharmacology, Medical Faculty, Heinrich-Heine-University, Germany
| | - Jon O Lundberg
- Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
| | - John Pernow
- Department of Cardiology, Karolinska Institute, Stockholm, Sweden
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research Center, Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Eddie Weitzberg
- Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
| | - Malte Kelm
- Cardiovascular Research Laboratory, Department of Cardiology Pneumology and Angiology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany; CARID, Cardiovascular Research Institute Düsseldorf, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
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20
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Wolpe AG, Luse MA, Johnstone SR, Xue J, Sabapathy V, Wakefield B, Sharma R, Barr K, Beier F, Laird D, Redemann S, Columbus L, Penuela S, Isakson BE. Endothelial Pannexin 3 – B Cell Lymphoma‐6 Interactions Protect Against Oxidative Stress. FASEB J 2022. [DOI: 10.1096/fasebj.2022.36.s1.r5405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Abigail G. Wolpe
- Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | - Melissa A. Luse
- Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | - Scott R. Johnstone
- Fralin Biomedical Research InstituteVirginia Tech School of MedicineRoanokeVA
| | - Jianxiang Xue
- Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | - Vikram Sabapathy
- Center for Immunity, Inflammation, and Regenerative Medicine (CIIR)University of VirginiaCharlottesvilleVA
| | - Brent Wakefield
- Department of Anatomy and Cell BiologyUniversity of Western OntarioLondonON
| | - Rahul Sharma
- Center for Immunity, Inflammation, and Regenerative Medicine (CIIR)University of VirginiaCharlottesvilleVA
| | - Kevin Barr
- Department of Anatomy and Cell BiologyUniversity of Western OntarioLondonON
| | - Frank Beier
- Department of Physiology and PharmacologyUniversity of Western OntarioLondonON
| | - Dale Laird
- Department of Anatomy and Cell BiologyUniversity of Western OntarioLondonON
- Department of Physiology and PharmacologyUniversity of Western OntarioLondonON
| | | | | | - Silvia Penuela
- Department of Anatomy and Cell BiologyUniversity of Western OntarioLondonON
| | - Brant E. Isakson
- Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
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21
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Ruddiman CA, Milosek V, Peckham R, Mecham RP, Wagenseil JE, Isakson BE. The internal elastic lamina of resistance arteries facilitates vasodilation. FASEB J 2022. [DOI: 10.1096/fasebj.2022.36.s1.r5605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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22
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Luse MA, Pavelic C, Tessema R, Cochran J, Minshall RD, Leitinger N, Isakson BE. Genetic deletion of endothelial Caveolin‐1 is protective against metabolic disease. FASEB J 2022. [DOI: 10.1096/fasebj.2022.36.s1.r5416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Melissa A. Luse
- Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | - Caitlin Pavelic
- Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
- Depratment of PharmacologyUniversity of VirginiaCharlottesvilleVA
| | - Rachael Tessema
- Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | - Jesse Cochran
- Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | | | - Norbert Leitinger
- Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | - Brant E. Isakson
- Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
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23
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Ruddiman CA, Peckham R, Corliss B, Peirce‐Cottler S, Isakson BE. Myoendothelial junction heterogeneity enables phosphatidylserine regulation of Kir2.1‐mediated vasodilation. FASEB J 2022. [DOI: 10.1096/fasebj.2022.36.s1.r5515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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24
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Wenceslau CF, McCarthy CG, Earley S, England SK, Filosa JA, Goulopoulou S, Gutterman DD, Isakson BE, Kanagy NL, Martinez-Lemus LA, Sonkusare SK, Thakore P, Trask AJ, Watts SW, Webb RC. Reply to Boedtkjer and Aalkjaer. Am J Physiol Heart Circ Physiol 2022; 322:H687-H688. [PMID: 35324334 PMCID: PMC8957339 DOI: 10.1152/ajpheart.00117.2022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 03/08/2022] [Accepted: 03/08/2022] [Indexed: 11/22/2022]
Affiliation(s)
- Camilla F Wenceslau
- Cardiovascular Translational Research Center, Department of Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina
| | - Cameron G McCarthy
- Cardiovascular Translational Research Center, Department of Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina
| | - Scott Earley
- Department of Pharmacology, Center for Molecular and Cellular Signaling in the Cardiovascular System, Reno School of Medicine, University of Nevada, Reno, Nevada
| | - Sarah K England
- Department of Obstetrics and Gynecology, Washington University School of Medicine, Saint Louis, Missouri
| | - Jessica A Filosa
- Department of Physiology, Medical College of Georgia, Augusta University, Augusta, Georgia
| | - Styliani Goulopoulou
- Lawrence D. Longo, MD Center for Perinatal Biology, Loma Linda University, School of Medicine, Loma Linda, California
| | - David D Gutterman
- Department of Medicine, Medical College of Wisconsin Cardiovascular Center, Milwaukee, Wisconsin
| | - Brant E Isakson
- Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Nancy L Kanagy
- Department of Cell Biology and Physiology, University of New Mexico, Albuquerque, New Mexico
| | - Luis A Martinez-Lemus
- Department of Medical Pharmacology and Physiology, Dalton Cardiovascular Research Center, University of Missouri, Columbia, Missouri
| | - Swapnil K Sonkusare
- Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Pratish Thakore
- Department of Pharmacology, Center for Molecular and Cellular Signaling in the Cardiovascular System, Reno School of Medicine, University of Nevada, Reno, Nevada
| | - Aaron J Trask
- Center for Cardiovascular Research, The Heart Center and The Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, Ohio
- Department of Pediatrics, The Ohio State University College of Medicine, Columbus, Ohio
| | - Stephanie W Watts
- Department of Pharmacology and Toxicology, Michigan State University, East Lansing, Michigan
| | - R Clinton Webb
- Cardiovascular Translational Research Center, Department of Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina
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25
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Wenceslau CF, McCarthy CG, Earley S, England SK, Filosa JA, Goulopoulou S, Gutterman DD, Isakson BE, Kanagy NL, Martinez-Lemus LA, Sonkusare SK, Thakore P, Trask AJ, Watts SW, Webb RC. Reply to De Mey et al. Am J Physiol Heart Circ Physiol 2022; 322:H683-H684. [PMID: 35324332 PMCID: PMC8957323 DOI: 10.1152/ajpheart.00086.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 02/15/2022] [Indexed: 11/22/2022]
Affiliation(s)
- Camilla F Wenceslau
- Cardiovascular Translational Research Center, Department of Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina
| | - Cameron G McCarthy
- Cardiovascular Translational Research Center, Department of Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina
| | - Scott Earley
- Department of Pharmacology, Center for Molecular and Cellular Signaling in the Cardiovascular System, Reno School of Medicine, University of Nevada, Reno, Nevada
| | - Sarah K England
- Department of Obstetrics and Gynecology, Washington University School of Medicine, Saint Louis, Missouri
| | - Jessica A Filosa
- Department of Physiology, Medical College of Georgia, Augusta University, Augusta, Georgia
| | - Styliani Goulopoulou
- Lawrence D. Longo, Medical Center for Perinatal Biology, School of Medicine, Loma Linda University, Loma Linda, California
| | - David D Gutterman
- Department of Medicine, Medical College of Wisconsin Cardiovascular Center, Milwaukee, Wisconsin
| | - Brant E Isakson
- Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Nancy L Kanagy
- Department of Cell Biology and Physiology, University of New Mexico, Albuquerque, New Mexico
| | - Luis A Martinez-Lemus
- Department of Medical Pharmacology and Physiology, Dalton Cardiovascular Research Center, University of Missouri, Columbia, Missouri
| | - Swapnil K Sonkusare
- Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Pratish Thakore
- Department of Pharmacology, Center for Molecular and Cellular Signaling in the Cardiovascular System, Reno School of Medicine, University of Nevada, Reno, Nevada
| | - Aaron J Trask
- Center for Cardiovascular Research, The Heart Center, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio
- Department of Pediatrics, The Ohio State University College of Medicine, Columbus, Ohio
| | - Stephanie W Watts
- Department of Pharmacology and Toxicology, Michigan State University, East Lansing, Michigan
| | - R Clinton Webb
- Cardiovascular Translational Research Center, Department of Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina
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26
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Filiberto AC, Spinosa MD, Elder CT, Su G, Leroy V, Ladd Z, Lu G, Mehaffey JH, Salmon MD, Hawkins RB, Ravichandran KS, Isakson BE, Upchurch GR, Sharma AK. Endothelial pannexin-1 channels modulate macrophage and smooth muscle cell activation in abdominal aortic aneurysm formation. Nat Commun 2022; 13:1521. [PMID: 35315432 PMCID: PMC8938517 DOI: 10.1038/s41467-022-29233-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 03/07/2022] [Indexed: 01/17/2023] Open
Abstract
Pannexin-1 (Panx1) channels have been shown to regulate leukocyte trafficking and tissue inflammation but the mechanism of Panx1 in chronic vascular diseases like abdominal aortic aneurysms (AAA) is unknown. Here we demonstrate that Panx1 on endothelial cells, but not smooth muscle cells, orchestrate a cascade of signaling events to mediate vascular inflammation and remodeling. Mechanistically, Panx1 on endothelial cells acts as a conduit for ATP release that stimulates macrophage activation via P2X7 receptors and mitochondrial DNA release to increase IL-1β and HMGB1 secretion. Secondly, Panx1 signaling regulates smooth muscle cell-dependent intracellular Ca2+ release and vascular remodeling via P2Y2 receptors. Panx1 blockade using probenecid markedly inhibits leukocyte transmigration, aortic inflammation and remodeling to mitigate AAA formation. Panx1 expression is upregulated in human AAAs and retrospective clinical data demonstrated reduced mortality in aortic aneurysm patients treated with Panx1 inhibitors. Collectively, these data identify Panx1 signaling as a contributory mechanism of AAA formation. Pannexin-1 ion channels on endothelial cells regulate vascular inflammation and remodeling to mediate aortic aneurysm formation. Pharmacological blockade of Pannexin-1 channels may offer translational therapeutic mitigation of aneurysmal pathology.
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27
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Molina SA, Maier-Begandt D, Isakson BE, Koval M. Electrophysiological Measurements of Isolated Blood Vessels. Bio Protoc 2022; 12:e4359. [PMID: 35434187 PMCID: PMC8983162 DOI: 10.21769/bioprotoc.4359] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Revised: 11/12/2021] [Accepted: 02/07/2022] [Indexed: 10/07/2023] Open
Abstract
The lumen of blood vessels is covered by endothelial cells, which regulate their permeability to ions and solutes. Endothelial permeability depends on the vascular bed and cell phenotype, and is influenced by different disease states. Most characterization of endothelial permeability has been carried out using isolated cells in culture. While analysis of cultured cells is a valuable approach, it does not account for factors of the native cell environment. Building on Ussing chamber studies of intact tissue specimens, here we describe a method to measure the electrophysiological properties of intact arteriole and venule endothelia, including transendothelial electrical resistance (TEER) and ion permselectivity. As an example, vessels isolated from the mesentery were treated ex vivo, then mounted in a custom-made tissue cassette that enable their analysis by classical approaches with an Ussing chamber. This method enables a detailed analysis of electrophysiological vessel responses to stresses such as proinflammatory cytokines, in the context of an intact vessel. Graphic abstract.
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Affiliation(s)
- Samuel A Molina
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Daniela Maier-Begandt
- Robert M. Berne Cardiovascular Research Center, University of Virginia, School of Medicine, Charlottesville, VA 22908, USA
- Walter Brendel Center of Experimental Medicine, University Hospital, and Institute of Cardiovascular Physiology and Pathophysiology, Biomedical Center, LMU Munich, 82152 Planegg-Martinsried, Germany
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia, School of Medicine, Charlottesville, VA 22908, USA
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Michael Koval
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA 30322, USA
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Kiger L, Keith J, Freiwan A, Fernandez AG, Tillman H, Isakson BE, Weiss MJ, Lechauve C. Redox-Regulation of α-Globin in Vascular Physiology. Antioxidants (Basel) 2022; 11:antiox11010159. [PMID: 35052663 PMCID: PMC8773178 DOI: 10.3390/antiox11010159] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 01/07/2022] [Accepted: 01/11/2022] [Indexed: 12/22/2022] Open
Abstract
Interest in the structure, function, and evolutionary relations of circulating and intracellular globins dates back more than 60 years to the first determination of the three-dimensional structure of these proteins. Non-erythrocytic globins have been implicated in circulatory control through reactions that couple nitric oxide (NO) signaling with cellular oxygen availability and redox status. Small artery endothelial cells (ECs) express free α-globin, which causes vasoconstriction by degrading NO. This reaction converts reduced (Fe2+) α-globin to the oxidized (Fe3+) form, which is unstable, cytotoxic, and unable to degrade NO. Therefore, (Fe3+) α-globin must be stabilized and recycled to (Fe2+) α-globin to reinitiate the catalytic cycle. The molecular chaperone α-hemoglobin-stabilizing protein (AHSP) binds (Fe3+) α-globin to inhibit its degradation and facilitate its reduction. The mechanisms that reduce (Fe3+) α-globin in ECs are unknown, although endothelial nitric oxide synthase (eNOS) and cytochrome b5 reductase (CyB5R3) with cytochrome b5 type A (CyB5a) can reduce (Fe3+) α-globin in solution. Here, we examine the expression and cellular localization of eNOS, CyB5a, and CyB5R3 in mouse arterial ECs and show that α-globin can be reduced by either of two independent redox systems, CyB5R3/CyB5a and eNOS. Together, our findings provide new insights into the regulation of blood vessel contractility.
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Affiliation(s)
- Laurent Kiger
- Inserm U955, Institut Mondor de Recherche Biomédicale, University Paris Est Creteil, 94017 Créteil, France;
| | - Julia Keith
- Department of Hematology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA; (J.K.); (A.G.F.); (M.J.W.)
| | - Abdullah Freiwan
- Department of Bone Marrow Transplantation and Cellular Therapy, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA;
| | - Alfonso G. Fernandez
- Department of Hematology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA; (J.K.); (A.G.F.); (M.J.W.)
| | - Heather Tillman
- Department of Pathology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA;
| | - Brant E. Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA;
| | - Mitchell J. Weiss
- Department of Hematology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA; (J.K.); (A.G.F.); (M.J.W.)
| | - Christophe Lechauve
- Department of Hematology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA; (J.K.); (A.G.F.); (M.J.W.)
- Correspondence: ; Tel.: +1-(901)-595-8344; Fax: +1-(901)-595-4723
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Grimmer B, Krauszman A, Hu X, Kabir G, Connelly KA, Li M, Grune J, Madry C, Isakson BE, Kuebler WM. Pannexin 1-a novel regulator of acute hypoxic pulmonary vasoconstriction. Cardiovasc Res 2021; 118:2535-2547. [PMID: 34668529 DOI: 10.1093/cvr/cvab326] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 09/08/2021] [Indexed: 12/16/2022] Open
Abstract
AIMS Hypoxic pulmonary vasoconstriction (HPV) is a physiological response to alveolar hypoxia that diverts blood flow from poorly ventilated to better aerated lung areas to optimize ventilation-perfusion matching. Yet, the exact sensory and signaling mechanisms by which hypoxia triggers pulmonary vasoconstriction remain incompletely understood. Recently, ATP release via pannexin 1 (Panx1) and subsequent signaling via purinergic P2Y receptors has been identified as regulator of vasoconstriction in systemic arterioles. Here, we probed for the role of Panx1-mediated ATP release in HPV and chronic hypoxic pulmonary hypertension (PH). METHODS AND RESULTS Pharmacological inhibition of Panx1 by probenecid, spironolactone, the Panx1 specific inhibitory peptide (10Panx1) and genetic deletion of Panx1 specifically in smooth muscle attenuated HPV in isolated perfused mouse lungs. In pulmonary artery smooth muscle cells (PASMC), both spironolactone and 10Panx1 attenuated the increase in intracellular Ca2+ concentration ([Ca2+]i) in response to hypoxia. Yet, genetic deletion of Panx1 in either endothelial or smooth muscle cells did not prevent the development of PH in mice. Unexpectedly, ATP release in response to hypoxia was not detectable in PASMC, and inhibition of purinergic receptors or ATP degradation by ATPase failed to attenuate HPV. Rather, transient receptor potential vanilloid 4 (TRPV4) antagonism and Panx1 inhibition inhibited the hypoxia-induced [Ca2+]i increase in PASMC in an additive manner, suggesting that Panx1 regulates [Ca2+]i independently of the ATP-P2Y-TRPV4 pathway. In line with this notion, Panx1 overexpression increased the [Ca2+]i response to hypoxia in HeLa cells. CONCLUSION In the present study we identify Panx1 as novel regulator of HPV. Yet, the role of Panx1 in HPV was not attributable to ATP release and downstream signaling via P2Y receptors or TRPV4 activation, but relates to a role of Panx1 as direct or indirect modulator of the PASMC Ca2+ response to hypoxia. Panx1 did not affect the development of chronic hypoxic PH. TRANSLATIONAL PERSPECTIVE Hypoxic pulmonary vasoconstriction (HPV) optimizes lung ventilation-perfusion matching, but also contributes to pulmonary pathologies including high altitude pulmonary edema (HAPE) or chronic hypoxic pulmonary hypertension. Here, we demonstrate that pharmaceutical inhibition as well as genetic deletion of the hemichannel pannexin-1 (Panx1) in pulmonary artery smooth muscle cells attenuates the physiological HPV response. Panx1 deficiency did, however, not prevent the development of chronic hypoxic pulmonary hypertension in mice. Panx1 inhibitors such as the mineralocorticoid receptor antagonist spironolactone may thus present a putative strategy for the prevention or treatment of HAPE, yet not for chronic hypoxic lung disease.
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Affiliation(s)
- Benjamin Grimmer
- Institute of Physiology, Charité-Universitätsmedizin Berlin, corporate member of the Freie Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany.,German Center for Cardiovascular Research (DZHK)
| | - Adrienn Krauszman
- Institute of Physiology, Charité-Universitätsmedizin Berlin, corporate member of the Freie Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany.,Keenan Research Centre for Biomedical Science, St. Michael's Hospital, Toronto, ON, Canada
| | - Xudong Hu
- Keenan Research Centre for Biomedical Science, St. Michael's Hospital, Toronto, ON, Canada
| | - Golam Kabir
- Keenan Research Centre for Biomedical Science, St. Michael's Hospital, Toronto, ON, Canada
| | - Kim A Connelly
- Keenan Research Centre for Biomedical Science, St. Michael's Hospital, Toronto, ON, Canada
| | - Mei Li
- Institute of Physiology, Charité-Universitätsmedizin Berlin, corporate member of the Freie Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany
| | - Jana Grune
- Institute of Physiology, Charité-Universitätsmedizin Berlin, corporate member of the Freie Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany
| | - Christian Madry
- Institute of Neurophysiology, Charité-Universitätsmedizin Berlin, corporate member of the Freie Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany
| | - Brant E Isakson
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, Virginia, USA.,Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Wolfgang M Kuebler
- Institute of Physiology, Charité-Universitätsmedizin Berlin, corporate member of the Freie Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany.,German Center for Cardiovascular Research (DZHK).,Keenan Research Centre for Biomedical Science, St. Michael's Hospital, Toronto, ON, Canada.,Departments of Physiology and Surgery, University of Toronto, ON, Canada
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30
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King DR, Sedovy MW, Leng X, Xue J, Lamouille S, Koval M, Isakson BE, Johnstone SR. Mechanisms of Connexin Regulating Peptides. Int J Mol Sci 2021; 22:ijms221910186. [PMID: 34638526 PMCID: PMC8507914 DOI: 10.3390/ijms221910186] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 09/16/2021] [Accepted: 09/17/2021] [Indexed: 12/22/2022] Open
Abstract
Gap junctions (GJ) and connexins play integral roles in cellular physiology and have been found to be involved in multiple pathophysiological states from cancer to cardiovascular disease. Studies over the last 60 years have demonstrated the utility of altering GJ signaling pathways in experimental models, which has led to them being attractive targets for therapeutic intervention. A number of different mechanisms have been proposed to regulate GJ signaling, including channel blocking, enhancing channel open state, and disrupting protein-protein interactions. The primary mechanism for this has been through the design of numerous peptides as therapeutics, that are either currently in early development or are in various stages of clinical trials. Despite over 25 years of research into connexin targeting peptides, the overall mechanisms of action are still poorly understood. In this overview, we discuss published connexin targeting peptides, their reported mechanisms of action, and the potential for these molecules in the treatment of disease.
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Affiliation(s)
- D. Ryan King
- Fralin Biomedical Research Institute at Virginia Tech Carilion School of Medicine, Virginia Tech, Roanoke, VA 24016, USA; (D.R.K.); (M.W.S.); (X.L.); (S.L.)
| | - Meghan W. Sedovy
- Fralin Biomedical Research Institute at Virginia Tech Carilion School of Medicine, Virginia Tech, Roanoke, VA 24016, USA; (D.R.K.); (M.W.S.); (X.L.); (S.L.)
- Translational Biology, Medicine, and Health Graduate Program, Virginia Tech, Blacksburg, VA 24061, USA
| | - Xinyan Leng
- Fralin Biomedical Research Institute at Virginia Tech Carilion School of Medicine, Virginia Tech, Roanoke, VA 24016, USA; (D.R.K.); (M.W.S.); (X.L.); (S.L.)
| | - Jianxiang Xue
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA; (J.X.); (B.E.I.)
| | - Samy Lamouille
- Fralin Biomedical Research Institute at Virginia Tech Carilion School of Medicine, Virginia Tech, Roanoke, VA 24016, USA; (D.R.K.); (M.W.S.); (X.L.); (S.L.)
- Center for Vascular and Heart Research, Virginia Tech, Roanoke, VA 24016, USA
| | - Michael Koval
- Department of Medicine, Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA;
| | - Brant E. Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA; (J.X.); (B.E.I.)
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Scott R. Johnstone
- Fralin Biomedical Research Institute at Virginia Tech Carilion School of Medicine, Virginia Tech, Roanoke, VA 24016, USA; (D.R.K.); (M.W.S.); (X.L.); (S.L.)
- Center for Vascular and Heart Research, Virginia Tech, Roanoke, VA 24016, USA
- Department of Biological Sciences, Virginia Tech, Blacksburg, VA 24060, USA
- Correspondence:
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31
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Daneva Z, Ottolini M, Chen YL, Klimentova E, Kuppusamy M, Shah SA, Minshall RD, Seye CI, Laubach VE, Isakson BE, Sonkusare SK. Endothelial pannexin 1-TRPV4 channel signaling lowers pulmonary arterial pressure in mice. eLife 2021; 10:67777. [PMID: 34490843 PMCID: PMC8448527 DOI: 10.7554/elife.67777] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 09/06/2021] [Indexed: 12/14/2022] Open
Abstract
Pannexin 1 (Panx1), an ATP-efflux pathway, has been linked with inflammation in pulmonary capillaries. However, the physiological roles of endothelial Panx1 in the pulmonary vasculature are unknown. Endothelial transient receptor potential vanilloid 4 (TRPV4) channels lower pulmonary artery (PA) contractility and exogenous ATP activates endothelial TRPV4 channels. We hypothesized that endothelial Panx1–ATP–TRPV4 channel signaling promotes vasodilation and lowers pulmonary arterial pressure (PAP). Endothelial, but not smooth muscle, knockout of Panx1 increased PA contractility and raised PAP in mice. Flow/shear stress increased ATP efflux through endothelial Panx1 in PAs. Panx1-effluxed extracellular ATP signaled through purinergic P2Y2 receptor (P2Y2R) to activate protein kinase Cα (PKCα), which in turn activated endothelial TRPV4 channels. Finally, caveolin-1 provided a signaling scaffold for endothelial Panx1, P2Y2R, PKCα, and TRPV4 channels in PAs, promoting their spatial proximity and enabling signaling interactions. These results indicate that endothelial Panx1–P2Y2R–TRPV4 channel signaling, facilitated by caveolin-1, reduces PA contractility and lowers PAP in mice.
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Affiliation(s)
- Zdravka Daneva
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, United States
| | - Matteo Ottolini
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, United States.,Department of Pharmacology, University of Virginia, Charlottesville, United States
| | - Yen Lin Chen
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, United States
| | - Eliska Klimentova
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, United States
| | - Maniselvan Kuppusamy
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, United States
| | - Soham A Shah
- Department of Biomedical Engineering, University of Virginia, Charlottesville, United States
| | - Richard D Minshall
- Department of Anesthesiology, Department of Pharmacology, University of Illinois, Chicago, United States
| | - Cheikh I Seye
- Department of Biochemistry, University of Missouri-Columbia, Columbia, United States
| | - Victor E Laubach
- Department of Surgery, University of Virginia, Charlottesville, United States
| | - Brant E Isakson
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, United States
| | - Swapnil K Sonkusare
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, United States.,Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, United States
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Bisht K, Okojie KA, Sharma K, Lentferink DH, Sun YY, Chen HR, Uweru JO, Amancherla S, Calcuttawala Z, Campos-Salazar AB, Corliss B, Jabbour L, Benderoth J, Friestad B, Mills WA, Isakson BE, Tremblay MÈ, Kuan CY, Eyo UB. Capillary-associated microglia regulate vascular structure and function through PANX1-P2RY12 coupling in mice. Nat Commun 2021; 12:5289. [PMID: 34489419 PMCID: PMC8421455 DOI: 10.1038/s41467-021-25590-8] [Citation(s) in RCA: 110] [Impact Index Per Article: 36.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 08/17/2021] [Indexed: 12/15/2022] Open
Abstract
Microglia are brain-resident immune cells with a repertoire of functions in the brain. However, the extent of their interactions with the vasculature and potential regulation of vascular physiology has been insufficiently explored. Here, we document interactions between ramified CX3CR1 + myeloid cell somata and brain capillaries. We confirm that these cells are bona fide microglia by molecular, morphological and ultrastructural approaches. Then, we give a detailed spatio-temporal characterization of these capillary-associated microglia (CAMs) comparing them with parenchymal microglia (PCMs) in their morphological activities including during microglial depletion and repopulation. Molecularly, we identify P2RY12 receptors as a regulator of CAM interactions under the control of released purines from pannexin 1 (PANX1) channels. Furthermore, microglial elimination triggered capillary dilation, blood flow increase, and impaired vasodilation that were recapitulated in P2RY12-/- and PANX1-/- mice suggesting purines released through PANX1 channels play important roles in activating microglial P2RY12 receptors to regulate neurovascular structure and function.
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Affiliation(s)
- Kanchan Bisht
- Department of Neuroscience, University of Virginia School of Medicine, Charlottesville, VA, USA
- Center for Brain Immunology and Glia, University of Virginia, Charlottesville, VA, USA
| | - Kenneth A Okojie
- Department of Neuroscience, University of Virginia School of Medicine, Charlottesville, VA, USA
- Center for Brain Immunology and Glia, University of Virginia, Charlottesville, VA, USA
| | - Kaushik Sharma
- Department of Neuroscience, University of Virginia School of Medicine, Charlottesville, VA, USA
- Center for Brain Immunology and Glia, University of Virginia, Charlottesville, VA, USA
| | - Dennis H Lentferink
- Department of Neuroscience, University of Virginia School of Medicine, Charlottesville, VA, USA
- Center for Brain Immunology and Glia, University of Virginia, Charlottesville, VA, USA
| | - Yu-Yo Sun
- Department of Neuroscience, University of Virginia School of Medicine, Charlottesville, VA, USA
- Center for Brain Immunology and Glia, University of Virginia, Charlottesville, VA, USA
| | - Hong-Ru Chen
- Department of Neuroscience, University of Virginia School of Medicine, Charlottesville, VA, USA
- Center for Brain Immunology and Glia, University of Virginia, Charlottesville, VA, USA
| | - Joseph O Uweru
- Department of Neuroscience, University of Virginia School of Medicine, Charlottesville, VA, USA
- Center for Brain Immunology and Glia, University of Virginia, Charlottesville, VA, USA
| | - Saipranusha Amancherla
- Department of Neuroscience, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Zainab Calcuttawala
- Department of Neuroscience, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Antony Brayan Campos-Salazar
- Department of Neuroscience, University of Virginia School of Medicine, Charlottesville, VA, USA
- Center for Brain Immunology and Glia, University of Virginia, Charlottesville, VA, USA
| | - Bruce Corliss
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Lara Jabbour
- Department of Neuroscience, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Jordan Benderoth
- Department of Neuroscience, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Bria Friestad
- Department of Neuroscience, University of Virginia School of Medicine, Charlottesville, VA, USA
- Center for Brain Immunology and Glia, University of Virginia, Charlottesville, VA, USA
| | - William A Mills
- Department of Neuroscience, University of Virginia School of Medicine, Charlottesville, VA, USA
- Center for Brain Immunology and Glia, University of Virginia, Charlottesville, VA, USA
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, USA
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Marie-Ève Tremblay
- Axe Neurosciences, Centre de recherche du CHU de Québec-Université Laval, Québec, QC, Canada
- Département de médecine moléculaire, Université Laval, Québec, QC, Canada
- Department of Neurology and Neurosurgery, McGill University, Montréal, QC, Canada
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
- Biochemistry and Molecular Biology, Faculty of Medicine, The University of British Colombia, Vancouver, BC, Canada
| | - Chia-Yi Kuan
- Department of Neuroscience, University of Virginia School of Medicine, Charlottesville, VA, USA
- Center for Brain Immunology and Glia, University of Virginia, Charlottesville, VA, USA
| | - Ukpong B Eyo
- Department of Neuroscience, University of Virginia School of Medicine, Charlottesville, VA, USA.
- Center for Brain Immunology and Glia, University of Virginia, Charlottesville, VA, USA.
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, USA.
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Keller TCS, Lechauve C, Keller AS, Brooks S, Weiss MJ, Columbus L, Ackerman HC, Cortese-Krott MM, Isakson BE. The role of globins in cardiovascular physiology. Physiol Rev 2021; 102:859-892. [PMID: 34486392 DOI: 10.1152/physrev.00037.2020] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Globin proteins exist in every cell type of the vasculature, from erythrocytes to endothelial cells, vascular smooth muscle cells, and peripheral nerve cells. Many globin subtypes are also expressed in muscle tissues (including cardiac and skeletal muscle), in other organ-specific cell types, and in cells of the central nervous system. The ability of each of these globins to interact with molecular oxygen (O2) and nitric oxide (NO) is preserved across these contexts. Endothelial α-globin is an example of extra-erythrocytic globin expression. Other globins, including myoglobin, cytoglobin, and neuroglobin are observed in other vascular tissues. Myoglobin is observed primarily in skeletal muscle and smooth muscle cells surrounding the aorta or other large arteries. Cytoglobin is found in vascular smooth muscle but can also be expressed in non-vascular cell types, especially in oxidative stress conditions after ischemic insult. Neuroglobin was first observed in neuronal cells, and its expression appears to be restricted mainly to the central and peripheral nervous systems. Brain and central nervous system neurons expressing neuroglobin are positioned close to many arteries within the brain parenchyma and can control smooth muscle contraction and, thus, tissue perfusion and vascular reactivity. Overall, reactions between NO and globin heme-iron contribute to vascular homeostasis by regulating vasodilatory NO signals and scaveging reactive species in cells of the mammalian vascular system. Here, we discuss how globin proteins affect vascular physiology with a focus on NO biology, and offer perspectives for future study of these functions.
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Affiliation(s)
- T C Steven Keller
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, United States.,Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA, United States
| | - Christophe Lechauve
- Department of Hematology, St. Jude's Children's Research Hospital, Memphis, TN, United States
| | - Alexander S Keller
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, United States.,Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, VA, United States
| | - Steven Brooks
- Physiology Unit, Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, Rockville, MD, United States
| | - Mitchell J Weiss
- Department of Hematology, St. Jude's Children's Research Hospital, Memphis, TN, United States
| | - Linda Columbus
- Department of Chemistry, University of Virginia, Charlottesville, VA, United States
| | - Hans C Ackerman
- Physiology Unit, Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, Rockville, MD, United States
| | - Miriam M Cortese-Krott
- Myocardial Infarction Research Laboratory, Department of Cardiology, Pulmunology, and Angiology, Medical Faculty, Heinrich-Heine-University of Düsseldorf, Düsseldorf, Germany.,Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, United States.,Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA, United States
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34
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Koval M, Cwiek A, Carr T, Good ME, Lohman AW, Isakson BE. Pannexin 1 as a driver of inflammation and ischemia-reperfusion injury. Purinergic Signal 2021; 17:521-531. [PMID: 34251590 PMCID: PMC8273370 DOI: 10.1007/s11302-021-09804-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 06/24/2021] [Indexed: 02/06/2023] Open
Abstract
Pannexin 1 (Panx1) is a ubiquitously expressed protein forming large conductance channels that are central to many distinct inflammation and injury responses. There is accumulating evidence showing ATP released from Panx1 channels, as well as metabolites, provide effective paracrine and autocrine signaling molecules that regulate different elements of the injury response. As channels with a broad range of permselectivity, Panx1 channels mediate the secretion and uptake of multiple solutes, ranging from calcium to bacterial derived molecules. In this review, we describe how Panx1 functions in response to different pro-inflammatory stimuli, focusing mainly on signaling coordinated by the vasculature. How Panx1 mediates ATP release by injured cells is also discussed. The ability of Panx1 to serve as a central component of many diverse physiologic responses has proven to be critically dependent on the context of expression, post-translational modification, interacting partners, and the mode of stimulation.
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Affiliation(s)
- Michael Koval
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University School of Medicine, 205 Whitehead Building, 615 Michael Street, Atlanta, GA, 30322, USA. .,Department of Cell Biology, Emory University School of Medicine, Atlanta, GA, 30322, USA.
| | - Aleksandra Cwiek
- Department of Cell Biology, University of Virginia School of Medicine, Charlottesville, VA, 22908, USA
| | - Thomas Carr
- Department of Cell Biology and Anatomy, University of Calgary Cumming School of Medicine, Calgary, AB, Canada.,Hotchkiss Brain Institute and Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB, Canada
| | - Miranda E Good
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA, USA
| | - Alexander W Lohman
- Department of Cell Biology and Anatomy, University of Calgary Cumming School of Medicine, Calgary, AB, Canada.,Hotchkiss Brain Institute and Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB, Canada
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research Center, School of Medicine, University of Virginia, PO Box 801394, Charlottesville, VA, 22908, USA. .,Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA, 22908, USA.
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35
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Leo F, Suvorava T, Heuser SK, Li J, LoBue A, Barbarino F, Piragine E, Schneckmann R, Hutzler B, Good ME, Fernandez BO, Vornholz L, Rogers S, Doctor A, Grandoch M, Stegbauer J, Weitzberg E, Feelisch M, Lundberg JO, Isakson BE, Kelm M, Cortese-Krott MM. Red Blood Cell and Endothelial eNOS Independently Regulate Circulating Nitric Oxide Metabolites and Blood Pressure. Circulation 2021; 144:870-889. [PMID: 34229449 PMCID: PMC8529898 DOI: 10.1161/circulationaha.120.049606] [Citation(s) in RCA: 76] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background: Current paradigms suggest that nitric oxide (NO) produced by endothelial cells (ECs) via endothelial nitric oxide synthase (eNOS) in the vessel wall is the primary regulator of blood flow and blood pressure. However, red blood cells (RBCs) also carry a catalytically active eNOS, but its role is controversial and remains undefined. This study aimed to elucidate the functional significance of red cell eNOS compared to EC eNOS for vascular hemodynamics and NO metabolism. Methods: We generated tissue-specific "loss-" and "gain-of-function" models for eNOS by using cell-specific Cre-induced gene inactivation or reactivation. We created two founder lines carrying a floxed eNOS (eNOSflox/flox) for Cre-inducible knock out (KO), as well as gene construct with an inactivated floxed/inverted exon (eNOSinv/inv) for a Cre-inducible knock in (KI), which respectively allow targeted deletion or reactivation of eNOS in erythroid cells (RBC eNOS KO or RBC eNOS KI mice) or endothelial cells (EC eNOS KO or EC eNOS KI mice). Vascular function, hemodynamics, and NO metabolism were compared ex vivo and in vivo. Results: The EC eNOS KOs exhibited significantly impaired aortic dilatory responses to acetylcholine, loss of flow-mediated dilation (FMD), and increased systolic and diastolic blood pressure. RBC eNOS KO mice showed no alterations in acetylcholine-mediated dilation or FMD but were hypertensive. Treatment with the NOS inhibitor L-NAME further increased blood pressure in RBC eNOS KOs, demonstrating that eNOS in both ECs and RBCs contributes to blood pressure regulation. While both EC eNOS KOs and RBC eNOS KOs had lower plasma nitrite and nitrate concentrations, the levels of bound NO in RBCs were lower in RBC eNOS KOs as compared to EC eNOS KOs. Crucially, reactivation of eNOS in ECs or RBCs rescues the hypertensive phenotype of the eNOSinv/inv mice, while the levels of bound NO were restored only in RBC eNOS KI mice. Conclusions:These data reveal that eNOS in ECs and RBCs contribute independently to blood pressure homeostasis.
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Affiliation(s)
- Francesca Leo
- Myocardial Infarction Research Laboratory, Department of Cardiology, Pulmonology, and Angiology, Medical Faculty, Heinrich-Heine-University, Universitätsstrasse 1, 40225 Düsseldorf, Germany
| | - Tatsiana Suvorava
- Myocardial Infarction Research Laboratory, Department of Cardiology, Pulmonology, and Angiology, Medical Faculty, Heinrich-Heine-University, Universitätsstrasse 1, 40225 Düsseldorf, Germany; Department of Cardiology Pneumology and Angiology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Sophia K Heuser
- Myocardial Infarction Research Laboratory, Department of Cardiology, Pulmonology, and Angiology, Medical Faculty, Heinrich-Heine-University, Universitätsstrasse 1, 40225 Düsseldorf, Germany
| | - Junjie Li
- Myocardial Infarction Research Laboratory, Department of Cardiology, Pulmonology, and Angiology, Medical Faculty, Heinrich-Heine-University, Universitätsstrasse 1, 40225 Düsseldorf, Germany
| | - Anthea LoBue
- Myocardial Infarction Research Laboratory, Department of Cardiology, Pulmonology, and Angiology, Medical Faculty, Heinrich-Heine-University, Universitätsstrasse 1, 40225 Düsseldorf, Germany
| | - Frederik Barbarino
- Myocardial Infarction Research Laboratory, Department of Cardiology, Pulmonology, and Angiology, Medical Faculty, Heinrich-Heine-University, Universitätsstrasse 1, 40225 Düsseldorf, Germany
| | - Eugenia Piragine
- Myocardial Infarction Research Laboratory, Department of Cardiology, Pulmonology, and Angiology, Medical Faculty, Heinrich-Heine-University, Universitätsstrasse 1, 40225 Düsseldorf, Germany; Department of Pharmacy, University of Pisa, Pisa, Italy
| | - Rebekka Schneckmann
- Department of Pharmacology and Clinical Pharmacology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Beate Hutzler
- Myocardial Infarction Research Laboratory, Department of Cardiology, Pulmonology, and Angiology, Medical Faculty, Heinrich-Heine-University, Universitätsstrasse 1, 40225 Düsseldorf, Germany
| | - Miranda E Good
- Robert M. Berne Cardiovascular Research Center, Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA; Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA
| | - Bernadette O Fernandez
- Clinical & Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Lukas Vornholz
- Myocardial Infarction Research Laboratory, Department of Cardiology, Pulmonology, and Angiology, Medical Faculty, Heinrich-Heine-University, Universitätsstrasse 1, 40225 Düsseldorf, Germany
| | - Stephen Rogers
- Department of Pediatrics, Center for Blood Oxygen Transport and Hemostasis, University of Maryland School of Medicine, MD
| | - Allan Doctor
- Department of Pediatrics, Center for Blood Oxygen Transport and Hemostasis, University of Maryland School of Medicine, MD
| | - Maria Grandoch
- Department of Pharmacology and Clinical Pharmacology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Johannes Stegbauer
- Department of Nephrology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Eddie Weitzberg
- Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
| | - Martin Feelisch
- Clinical & Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Jon O Lundberg
- Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research Center, Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA
| | - Malte Kelm
- Department of Cardiology Pneumology and Angiology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany; CARID, Cardiovascular Research Institute Düsseldorf, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Miriam M Cortese-Krott
- Myocardial Infarction Research Laboratory, Department of Cardiology, Pulmonology, and Angiology, Medical Faculty, Heinrich-Heine-University, Universitätsstrasse 1, 40225 Düsseldorf, Germany; Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, Sweden; Department of Cardiology Pneumology and Angiology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
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36
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Wenceslau CF, McCarthy CG, Earley S, England SK, Filosa JA, Goulopoulou S, Gutterman DD, Isakson BE, Kanagy NL, Martinez-Lemus LA, Sonkusare SK, Thakore P, Trask AJ, Watts SW, Webb RC. Guidelines for the measurement of vascular function and structure in isolated arteries and veins. Am J Physiol Heart Circ Physiol 2021; 321:H77-H111. [PMID: 33989082 DOI: 10.1152/ajpheart.01021.2020] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The measurement of vascular function in isolated vessels has revealed important insights into the structural, functional, and biomechanical features of the normal and diseased cardiovascular system and has provided a molecular understanding of the cells that constitutes arteries and veins and their interaction. Further, this approach has allowed the discovery of vital pharmacological treatments for cardiovascular diseases. However, the expansion of the vascular physiology field has also brought new concerns over scientific rigor and reproducibility. Therefore, it is appropriate to set guidelines for the best practices of evaluating vascular function in isolated vessels. These guidelines are a comprehensive document detailing the best practices and pitfalls for the assessment of function in large and small arteries and veins. Herein, we bring together experts in the field of vascular physiology with the purpose of developing guidelines for evaluating ex vivo vascular function. By using this document, vascular physiologists will have consistency among methodological approaches, producing more reliable and reproducible results.
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Affiliation(s)
- Camilla F Wenceslau
- Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, Ohio
| | - Cameron G McCarthy
- Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, Ohio
| | - Scott Earley
- Department of Pharmacology, Center for Molecular and Cellular Signaling in the Cardiovascular System, Reno School of Medicine, University of Nevada, Reno, Nevada
| | - Sarah K England
- Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, Missouri
| | - Jessica A Filosa
- Department of Physiology, Medical College of Georgia, Augusta University, Augusta, Georgia
| | - Styliani Goulopoulou
- Department of Physiology and Anatomy, University of North Texas Health Science Center, Fort Worth, Texas
| | - David D Gutterman
- Department of Medicine, Medical College of Wisconsin Cardiovascular Center, Milwaukee, Wisconsin
| | - Brant E Isakson
- Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Nancy L Kanagy
- Department of Cell Biology and Physiology, University of New Mexico, Albuquerque, New Mexico
| | - Luis A Martinez-Lemus
- Department of Medical Pharmacology and Physiology, Dalton Cardiovascular Research Center, University of Missouri, Columbia, Missouri
| | - Swapnil K Sonkusare
- Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Pratish Thakore
- Department of Pharmacology, Center for Molecular and Cellular Signaling in the Cardiovascular System, Reno School of Medicine, University of Nevada, Reno, Nevada
| | - Aaron J Trask
- Center for Cardiovascular Research, The Heart Center, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio.,Department of Pediatrics, The Ohio State University College of Medicine, Columbus, Ohio
| | - Stephanie W Watts
- Department of Pharmacology and Toxicology, Michigan State University, East Lansing, Michigan
| | - R Clinton Webb
- Cardiovascular Translational Research Center, Department of Cell Biology and Anatomy, University of South Carolina, Columbia, South Carolina
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37
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Daneva Z, Marziano C, Ottolini M, Chen YL, Baker TM, Kuppusamy M, Zhang A, Ta HQ, Reagan CE, Mihalek AD, Kasetti RB, Shen Y, Isakson BE, Minshall RD, Zode GS, Goncharova EA, Laubach VE, Sonkusare SK. Caveolar peroxynitrite formation impairs endothelial TRPV4 channels and elevates pulmonary arterial pressure in pulmonary hypertension. Proc Natl Acad Sci U S A 2021; 118:e2023130118. [PMID: 33879616 PMCID: PMC8092599 DOI: 10.1073/pnas.2023130118] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Recent studies have focused on the contribution of capillary endothelial TRPV4 channels to pulmonary pathologies, including lung edema and lung injury. However, in pulmonary hypertension (PH), small pulmonary arteries are the focus of the pathology, and endothelial TRPV4 channels in this crucial anatomy remain unexplored in PH. Here, we provide evidence that TRPV4 channels in endothelial cell caveolae maintain a low pulmonary arterial pressure under normal conditions. Moreover, the activity of caveolar TRPV4 channels is impaired in pulmonary arteries from mouse models of PH and PH patients. In PH, up-regulation of iNOS and NOX1 enzymes at endothelial cell caveolae results in the formation of the oxidant molecule peroxynitrite. Peroxynitrite, in turn, targets the structural protein caveolin-1 to reduce the activity of TRPV4 channels. These results suggest that endothelial caveolin-1-TRPV4 channel signaling lowers pulmonary arterial pressure, and impairment of endothelial caveolin-1-TRPV4 channel signaling contributes to elevated pulmonary arterial pressure in PH. Thus, inhibiting NOX1 or iNOS activity, or lowering endothelial peroxynitrite levels, may represent strategies for restoring vasodilation and pulmonary arterial pressure in PH.
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Affiliation(s)
- Zdravka Daneva
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA 22908
| | - Corina Marziano
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA 22908
| | - Matteo Ottolini
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA 22908
- Department of Pharmacology, University of Virginia, Charlottesville, VA 22908
| | - Yen-Lin Chen
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA 22908
| | - Thomas M Baker
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA 22908
| | - Maniselvan Kuppusamy
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA 22908
| | - Aimee Zhang
- Department of Surgery, University of Virginia, Charlottesville, VA 22908
| | - Huy Q Ta
- Department of Surgery, University of Virginia, Charlottesville, VA 22908
| | - Claire E Reagan
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA 22908
| | - Andrew D Mihalek
- Department of Pulmonary and Critical Care Medicine, University of Virginia, Charlottesville, VA 22908
| | - Ramesh B Kasetti
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, TX 76107
- North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, TX 76107
| | - Yuanjun Shen
- Pittsburgh Heart, Lung and Blood Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA 15213
- Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA 15213
- Department of Medicine, University of Pittsburgh, Pittsburgh, PA 15213
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15213
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA 22908
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, VA 22908
| | - Richard D Minshall
- Department of Anesthesiology, University of Illinois at Chicago, Chicago, IL 60612
- Department of Pharmacology, University of Illinois at Chicago, Chicago, IL 60612
| | - Gulab S Zode
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, TX 76107
- North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, TX 76107
| | - Elena A Goncharova
- Pittsburgh Heart, Lung and Blood Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA 15213
- Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA 15213
- Department of Medicine, University of Pittsburgh, Pittsburgh, PA 15213
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15213
| | - Victor E Laubach
- Department of Surgery, University of Virginia, Charlottesville, VA 22908
| | - Swapnil K Sonkusare
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA 22908;
- Department of Pharmacology, University of Virginia, Charlottesville, VA 22908
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, VA 22908
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38
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Maier-Begandt D, Comstra HS, Molina SA, Krüger N, Ruddiman CA, Chen YL, Chen X, Biwer LA, Johnstone SR, Lohman AW, Good ME, DeLalio LJ, Hong K, Bacon HM, Yan Z, Sonkusare SK, Koval M, Isakson BE. A venous-specific purinergic signaling cascade initiated by Pannexin 1 regulates TNFα-induced increases in endothelial permeability. Sci Signal 2021; 14:14/672/eaba2940. [PMID: 33653920 PMCID: PMC8011850 DOI: 10.1126/scisignal.aba2940] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The endothelial cell barrier regulates the passage of fluid between the bloodstream and underlying tissues, and barrier function impairment exacerbates the severity of inflammatory insults. To understand how inflammation alters vessel permeability, we studied the effects of the proinflammatory cytokine TNFα on transendothelial permeability and electrophysiology in ex vivo murine veins and arteries. We found that TNFα specifically decreased the barrier function of venous endothelium without affecting that of arterial endothelium. On the basis of RNA expression profiling and protein analysis, we found that claudin-11 (CLDN11) was the predominant claudin in venous endothelial cells and that there was little, if any, CLDN11 in arterial endothelial cells. Consistent with a difference in claudin composition, TNFα increased the permselectivity of Cl- over Na+ in venous but not arterial endothelium. The vein-specific effects of TNFα also required the activation of Pannexin 1 (Panx1) channels and the CD39-mediated hydrolysis of ATP to adenosine, which subsequently stimulated A2A adenosine receptors. Moreover, the increase in vein permeability required the activation of the Ca2+ channel TRPV4 downstream of Panx1 activation. Panx1-deficient mice resisted the pathologic effects of sepsis induced by cecal ligation and puncture on life span and lung vascular permeability. These data provide a targetable pathway with the potential to promote vein barrier function and prevent the deleterious effects of vascular leak in response to inflammation.
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Affiliation(s)
- Daniela Maier-Begandt
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA.,Walter Brendel Center of Experimental Medicine, University Hospital, and Institute of Cardiovascular Physiology and Pathophysiology, Biomedical Center, LMU Munich, 82152 Planegg-Martinsried, Germany
| | - Heather Skye Comstra
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Samuel A Molina
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Nenja Krüger
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA.,Institute of Animal Developmental and Molecular Biology, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Claire A Ruddiman
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Yen-Lin Chen
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Xiaobin Chen
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Lauren A Biwer
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA.,Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Scott R Johnstone
- Fralin Biomedical Research Institute at Virginia Tech Carilion Center for Heart and Reparative Medicine Research, Virginia Tech, Roanoke, VA 24016, USA.,Department of Biological Sciences, Virginia Tech, Blacksburg, VA 24060, USA
| | - Alexander W Lohman
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta T2N 4N1, Canada.,Department of Cell Biology and Anatomy, University of Calgary, Calgary, Alberta T2N 4N1, Canada
| | - Miranda E Good
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA 02111, USA
| | - Leon J DeLalio
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Kwangseok Hong
- Department of Physical Education, College of Education, Chung-Ang University, Seoul 06974, South Korea
| | - Hannah M Bacon
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Zhen Yan
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Swapnil K Sonkusare
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA.,Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Michael Koval
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA. .,Department of Cell Biology, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA. .,Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
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39
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Good ME, Young AP, Wolpe AG, Ma M, Hall PJ, Duffy CK, Aronovitz MJ, Martin GL, Blanton RM, Leitinger N, Johnstone SR, Wolf MJ, Isakson BE. Endothelial Pannexin 1 Regulates Cardiac Response to Myocardial Infarction. Circ Res 2021; 128:1211-1213. [PMID: 33641341 DOI: 10.1161/circresaha.120.317272] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Miranda E Good
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA (M.E.G., C.K.D., M.J.A., G.L.M., R.M.B.)
| | - Alexander P Young
- Cardiovascular Medicine, Department of Medicine (A.P.Y., M.J.W.), University of Virginia School of Medicine, Charlottesville, VA.,Robert M Berne Cardiovascular Research Center (A.P.Y., A.G.W., P.J.H., M.J.W., B.E.I.), University of Virginia School of Medicine, Charlottesville, VA
| | - Abigail G Wolpe
- Robert M Berne Cardiovascular Research Center (A.P.Y., A.G.W., P.J.H., M.J.W., B.E.I.), University of Virginia School of Medicine, Charlottesville, VA.,Cell Biology (A.G.W.), University of Virginia School of Medicine, Charlottesville, VA
| | - Manxiu Ma
- Fralin Biomedical Research Institute, Virginia Tech Carilion Center for Heart and Reparative Medicine Research, Virginia Tech, Roanoke, VA (M.M., S.R.J.)
| | - Philip J Hall
- Robert M Berne Cardiovascular Research Center (A.P.Y., A.G.W., P.J.H., M.J.W., B.E.I.), University of Virginia School of Medicine, Charlottesville, VA
| | - Colleen K Duffy
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA (M.E.G., C.K.D., M.J.A., G.L.M., R.M.B.)
| | - Mark J Aronovitz
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA (M.E.G., C.K.D., M.J.A., G.L.M., R.M.B.)
| | - Gregory L Martin
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA (M.E.G., C.K.D., M.J.A., G.L.M., R.M.B.)
| | - Robert M Blanton
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA (M.E.G., C.K.D., M.J.A., G.L.M., R.M.B.)
| | - Norbert Leitinger
- Pharmacology (N.L.), University of Virginia School of Medicine, Charlottesville, VA
| | - Scott R Johnstone
- Fralin Biomedical Research Institute, Virginia Tech Carilion Center for Heart and Reparative Medicine Research, Virginia Tech, Roanoke, VA (M.M., S.R.J.).,Biological Sciences, Virginia Tech, Blacksburg, VA (S.R.J.)
| | - Matthew J Wolf
- Cardiovascular Medicine, Department of Medicine (A.P.Y., M.J.W.), University of Virginia School of Medicine, Charlottesville, VA.,Robert M Berne Cardiovascular Research Center (A.P.Y., A.G.W., P.J.H., M.J.W., B.E.I.), University of Virginia School of Medicine, Charlottesville, VA
| | - Brant E Isakson
- Robert M Berne Cardiovascular Research Center (A.P.Y., A.G.W., P.J.H., M.J.W., B.E.I.), University of Virginia School of Medicine, Charlottesville, VA.,Molecular Physiology and Biophysics (B.E.I.), University of Virginia School of Medicine, Charlottesville, VA
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40
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Thakore P, Alvarado MG, Ali S, Mughal A, Pires PW, Yamasaki E, Pritchard HA, Isakson BE, Tran CHT, Earley S. Brain endothelial cell TRPA1 channels initiate neurovascular coupling. eLife 2021; 10:63040. [PMID: 33635784 PMCID: PMC7935492 DOI: 10.7554/elife.63040] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 02/25/2021] [Indexed: 02/07/2023] Open
Abstract
Cerebral blood flow is dynamically regulated by neurovascular coupling to meet the dynamic metabolic demands of the brain. We hypothesized that TRPA1 channels in capillary endothelial cells are stimulated by neuronal activity and instigate a propagating retrograde signal that dilates upstream parenchymal arterioles to initiate functional hyperemia. We find that activation of TRPA1 in capillary beds and post-arteriole transitional segments with mural cell coverage initiates retrograde signals that dilate upstream arterioles. These signals exhibit a unique mode of biphasic propagation. Slow, short-range intercellular Ca2+ signals in the capillary network are converted to rapid electrical signals in transitional segments that propagate to and dilate upstream arterioles. We further demonstrate that TRPA1 is necessary for functional hyperemia and neurovascular coupling within the somatosensory cortex of mice in vivo. These data establish endothelial cell TRPA1 channels as neuronal activity sensors that initiate microvascular vasodilatory responses to redirect blood to regions of metabolic demand.
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Affiliation(s)
- Pratish Thakore
- Department of Pharmacology, Center for Molecular and Cellular Signaling in the Cardiovascular System, University of Nevada, Reno School of Medicine, Reno, United States
| | - Michael G Alvarado
- Department of Pharmacology, Center for Molecular and Cellular Signaling in the Cardiovascular System, University of Nevada, Reno School of Medicine, Reno, United States
| | - Sher Ali
- Department of Pharmacology, Center for Molecular and Cellular Signaling in the Cardiovascular System, University of Nevada, Reno School of Medicine, Reno, United States
| | - Amreen Mughal
- Department of Pharmacology, College of Medicine, University of Vermont, Burlington, United States
| | - Paulo W Pires
- Department of Physiology, College of Medicine, University of Arizona, Tucson, United States
| | - Evan Yamasaki
- Department of Pharmacology, Center for Molecular and Cellular Signaling in the Cardiovascular System, University of Nevada, Reno School of Medicine, Reno, United States
| | - Harry At Pritchard
- Department of Pharmacology, Center for Molecular and Cellular Signaling in the Cardiovascular System, University of Nevada, Reno School of Medicine, Reno, United States.,Institute of Cardiovascular Sciences, University of Manchester, Manchester, United Kingdom
| | - Brant E Isakson
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, United States.,Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, United States
| | - Cam Ha T Tran
- Department of Physiology & Cell Biology, Center for Molecular and Cellular Signaling in the Cardiovascular System, University of Nevada, Reno School of Medicine, Reno, United States
| | - Scott Earley
- Department of Pharmacology, Center for Molecular and Cellular Signaling in the Cardiovascular System, University of Nevada, Reno School of Medicine, Reno, United States
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41
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Wolpe AG, Ruddiman CA, Hall PJ, Isakson BE. Polarized Proteins in Endothelium and Their Contribution to Function. J Vasc Res 2021; 58:65-91. [PMID: 33503620 DOI: 10.1159/000512618] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 10/27/2020] [Indexed: 12/11/2022] Open
Abstract
Protein localization in endothelial cells is tightly regulated to create distinct signaling domains within their tight spatial restrictions including luminal membranes, abluminal membranes, and interendothelial junctions, as well as caveolae and calcium signaling domains. Protein localization in endothelial cells is also determined in part by the vascular bed, with differences between arteries and veins and between large and small arteries. Specific protein polarity and localization is essential for endothelial cells in responding to various extracellular stimuli. In this review, we examine protein localization in the endothelium of resistance arteries, with occasional references to other vessels for contrast, and how that polarization contributes to endothelial function and ultimately whole organism physiology. We highlight the protein localization on the luminal surface, discussing important physiological receptors and the glycocalyx. The protein polarization to the abluminal membrane is especially unique in small resistance arteries with the presence of the myoendothelial junction, a signaling microdomain that regulates vasodilation, feedback to smooth muscle cells, and ultimately total peripheral resistance. We also discuss the interendothelial junction, where tight junctions, adherens junctions, and gap junctions all convene and regulate endothelial function. Finally, we address planar cell polarity, or axial polarity, and how this is regulated by mechanosensory signals like blood flow.
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Affiliation(s)
- Abigail G Wolpe
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA.,Department of Cell Biology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Claire A Ruddiman
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA.,Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Phillip J Hall
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA, .,Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, Virginia, USA,
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42
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Luse MA, Heiston EM, Malin SK, Isakson BE. Cellular and Functional Effects of Insulin Based Therapies and Exercise on Endothelium. Curr Pharm Des 2021; 26:3760-3767. [PMID: 32693765 DOI: 10.2174/1381612826666200721002735] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 06/04/2020] [Indexed: 12/24/2022]
Abstract
Endothelial dysfunction is a hallmark of type 2 diabetes that can have severe consequences on vascular function, including hypertension and changes in blood flow, as well as exercise performance. Because endothelium is also the barrier for insulin movement into tissues, it acts as a gatekeeper for transport and glucose uptake. For this reason, endothelial dysfunction is a tempting area for pharmacological and/or exercise intervention with insulin-based therapies. In this review, we describe the current state of drugs that can be used to treat endothelial dysfunction in type 2 diabetes and diabetes-related diseases (e.g., obesity) at the molecular levels, and also discuss their role in exercise.
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Affiliation(s)
- Melissa A Luse
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Virginia, United States
| | - Emily M Heiston
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Virginia, United States
| | - Steven K Malin
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Virginia, United States
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Virginia, United States
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43
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Wischmann P, Kuhn V, Suvorava T, Muessig JM, Fischer JW, Isakson BE, Haberkorn SM, Flögel U, Schrader J, Jung C, Cortese-Krott MM, Heusch G, Kelm M. Anaemia is associated with severe RBC dysfunction and a reduced circulating NO pool: vascular and cardiac eNOS are crucial for the adaptation to anaemia. Basic Res Cardiol 2020; 115:43. [PMID: 32533377 PMCID: PMC7293199 DOI: 10.1007/s00395-020-0799-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 05/13/2020] [Indexed: 02/07/2023]
Abstract
Anaemia is frequently present in patients with acute myocardial infarction (AMI) and contributes to an adverse prognosis. We hypothesised that, besides reduced oxygen carrying capacity, anaemia is associated with (1) red blood cell (RBC) dysfunction and a reduced circulating nitric oxide (NO) pool, (2) compensatory enhancement of vascular and cardiac endothelial nitric oxide synthase (eNOS) activity, and (3) contribution of both, RBC dysfunction and reduced circulatory NO pool to left ventricular (LV) dysfunction and fatal outcome in AMI. In mouse models of subacute and chronic anaemia from repeated mild blood loss the circulating NO pool, RBC, cardiac and vascular function were analysed at baseline and in reperfused AMI. In anaemia, RBC function resulted in profound changes in membrane properties, enhanced turnover, haemolysis, dysregulation of intra-erythrocytotic redox state, and RBC-eNOS. RBC from anaemic mice and from anaemic patients with acute coronary syndrome impaired the recovery of contractile function of isolated mouse hearts following ischaemia/reperfusion. In anaemia, the circulating NO pool was reduced. The cardiac and vascular adaptation to anaemia was characterised by increased arterial eNOS expression and activity and an eNOS-dependent increase of end-diastolic left ventricular volume. Endothelial dysfunction induced through genetic or pharmacologic reduction of eNOS-activity abrogated the anaemia-induced cardio-circulatory compensation. Superimposed AMI was associated with decreased survival. In summary, moderate blood loss anaemia is associated with severe RBC dysfunction and reduced circulating NO pool. Vascular and cardiac eNOS are crucial for the cardio-circulatory adaptation to anaemia. RBC dysfunction together with eNOS dysfunction may contribute to adverse outcomes in AMI.
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Affiliation(s)
- Patricia Wischmann
- Department of Cardiology, Pulmonary Diseases, and Vascular Medicine, Medical Faculty, CARID Cardiovascular Research Institute of Duesseldorf, Heinrich Heine University of Duesseldorf, Moorenstr. 5, 40225, Düsseldorf, Germany.,Division of Cardiology, Pulmonary Diseases and Vascular Medicine, University Hospital of Duesseldorf, Düsseldorf, Germany.,Cardiovascular Research Laboratory, Medical Faculty, Heinrich-Heine University, Düsseldorf, Germany
| | - Viktoria Kuhn
- Department of Cardiology, Pulmonary Diseases, and Vascular Medicine, Medical Faculty, CARID Cardiovascular Research Institute of Duesseldorf, Heinrich Heine University of Duesseldorf, Moorenstr. 5, 40225, Düsseldorf, Germany.,Division of Cardiology, Pulmonary Diseases and Vascular Medicine, University Hospital of Duesseldorf, Düsseldorf, Germany.,Cardiovascular Research Laboratory, Medical Faculty, Heinrich-Heine University, Düsseldorf, Germany
| | - Tatsiana Suvorava
- Department of Cardiology, Pulmonary Diseases, and Vascular Medicine, Medical Faculty, CARID Cardiovascular Research Institute of Duesseldorf, Heinrich Heine University of Duesseldorf, Moorenstr. 5, 40225, Düsseldorf, Germany.,Division of Cardiology, Pulmonary Diseases and Vascular Medicine, University Hospital of Duesseldorf, Düsseldorf, Germany.,Cardiovascular Research Laboratory, Medical Faculty, Heinrich-Heine University, Düsseldorf, Germany
| | - Johanna M Muessig
- Department of Cardiology, Pulmonary Diseases, and Vascular Medicine, Medical Faculty, CARID Cardiovascular Research Institute of Duesseldorf, Heinrich Heine University of Duesseldorf, Moorenstr. 5, 40225, Düsseldorf, Germany.,Division of Cardiology, Pulmonary Diseases and Vascular Medicine, University Hospital of Duesseldorf, Düsseldorf, Germany.,Cardiovascular Research Laboratory, Medical Faculty, Heinrich-Heine University, Düsseldorf, Germany
| | - Jens W Fischer
- Department of Cardiology, Pulmonary Diseases, and Vascular Medicine, Medical Faculty, CARID Cardiovascular Research Institute of Duesseldorf, Heinrich Heine University of Duesseldorf, Moorenstr. 5, 40225, Düsseldorf, Germany.,Department of Pharmacology and Clinical Pharmacology, Heinrich-Heine University, Düsseldorf, Germany
| | - Brant E Isakson
- Department of Molecular Physiology and Biological Physics, Robert M. Berne Cardiovascular Research Centre, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Sebastian M Haberkorn
- Department of Cardiology, Pulmonary Diseases, and Vascular Medicine, Medical Faculty, CARID Cardiovascular Research Institute of Duesseldorf, Heinrich Heine University of Duesseldorf, Moorenstr. 5, 40225, Düsseldorf, Germany.,Division of Cardiology, Pulmonary Diseases and Vascular Medicine, University Hospital of Duesseldorf, Düsseldorf, Germany.,Department of Molecular Cardiology, Heinrich Heine University, Düsseldorf, Germany
| | - Ulrich Flögel
- Department of Cardiology, Pulmonary Diseases, and Vascular Medicine, Medical Faculty, CARID Cardiovascular Research Institute of Duesseldorf, Heinrich Heine University of Duesseldorf, Moorenstr. 5, 40225, Düsseldorf, Germany.,Division of Cardiology, Pulmonary Diseases and Vascular Medicine, University Hospital of Duesseldorf, Düsseldorf, Germany.,Department of Molecular Cardiology, Heinrich Heine University, Düsseldorf, Germany
| | - Jürgen Schrader
- Department of Cardiology, Pulmonary Diseases, and Vascular Medicine, Medical Faculty, CARID Cardiovascular Research Institute of Duesseldorf, Heinrich Heine University of Duesseldorf, Moorenstr. 5, 40225, Düsseldorf, Germany.,Department of Molecular Cardiology, Heinrich Heine University, Düsseldorf, Germany
| | - Christian Jung
- Department of Cardiology, Pulmonary Diseases, and Vascular Medicine, Medical Faculty, CARID Cardiovascular Research Institute of Duesseldorf, Heinrich Heine University of Duesseldorf, Moorenstr. 5, 40225, Düsseldorf, Germany.,Division of Cardiology, Pulmonary Diseases and Vascular Medicine, University Hospital of Duesseldorf, Düsseldorf, Germany.,Cardiovascular Research Laboratory, Medical Faculty, Heinrich-Heine University, Düsseldorf, Germany
| | - Miriam M Cortese-Krott
- Department of Cardiology, Pulmonary Diseases, and Vascular Medicine, Medical Faculty, CARID Cardiovascular Research Institute of Duesseldorf, Heinrich Heine University of Duesseldorf, Moorenstr. 5, 40225, Düsseldorf, Germany.,Division of Cardiology, Pulmonary Diseases and Vascular Medicine, University Hospital of Duesseldorf, Düsseldorf, Germany.,Cardiovascular Research Laboratory, Medical Faculty, Heinrich-Heine University, Düsseldorf, Germany
| | - Gerd Heusch
- Institute for Pathophysiology, West German Heart and Vascular Centre, University of Essen Medical School, Essen, Germany
| | - Malte Kelm
- Department of Cardiology, Pulmonary Diseases, and Vascular Medicine, Medical Faculty, CARID Cardiovascular Research Institute of Duesseldorf, Heinrich Heine University of Duesseldorf, Moorenstr. 5, 40225, Düsseldorf, Germany. .,Division of Cardiology, Pulmonary Diseases and Vascular Medicine, University Hospital of Duesseldorf, Düsseldorf, Germany. .,Cardiovascular Research Laboratory, Medical Faculty, Heinrich-Heine University, Düsseldorf, Germany.
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Swayne LA, Johnstone SR, Ng CS, Sanchez-Arias JC, Good ME, Penuela S, Lohman AW, Wolpe AG, Laubach VE, Koval M, Isakson BE. Consideration of Pannexin 1 channels in COVID-19 pathology and treatment. Am J Physiol Lung Cell Mol Physiol 2020; 319:L121-L125. [PMID: 32519892 PMCID: PMC7347959 DOI: 10.1152/ajplung.00146.2020] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
- Leigh Anne Swayne
- Division of Medical Sciences, University of Victoria, Victoria, British Columbia, Canada
| | - Scott R Johnstone
- Fralin Biomedical Research Institute at Virginia Tech Carilion Center for Heart and Reparative Medicine Research, Virginia Tech, Roanoke, Virginia.,Department of Biological Sciences, Virginia Tech, Roanoke, Virginia
| | - Chen Seng Ng
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada.,Centre for Heart Lung Innovation, St. Paul's Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Juan C Sanchez-Arias
- Division of Medical Sciences, University of Victoria, Victoria, British Columbia, Canada
| | - Miranda E Good
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston, Massachusetts
| | - Silvia Penuela
- Department of Anatomy and Cell Biology, University of Western Ontario, London, Ontario, Canada
| | - Alexander W Lohman
- Department of Cell Biology and Anatomy, University of Calgary, Calgary, Alberta, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
| | - Abigail G Wolpe
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia.,Department of Cell Biology, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Victor E Laubach
- Department of Surgery, University of Virginia School of Medicine, Charlottesville, Virginia.,Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Michael Koval
- Department of Medicine, Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Emory University School of Medicine, Atlanta, Georgia
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia.,Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, Virginia
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45
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DeLalio LJ, Masati E, Mendu S, Ruddiman CA, Yang Y, Johnstone SR, Milstein JA, Keller TCS, Weaver RB, Guagliardo NA, Best AK, Ravichandran KS, Bayliss DA, Sequeira-Lopez MLS, Sonkusare SN, Shu XH, Desai B, Barrett PQ, Le TH, Gomez RA, Isakson BE. Pannexin 1 channels in renin-expressing cells influence renin secretion and blood pressure homeostasis. Kidney Int 2020; 98:630-644. [PMID: 32446934 PMCID: PMC7483468 DOI: 10.1016/j.kint.2020.04.041] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 03/29/2020] [Accepted: 04/02/2020] [Indexed: 02/07/2023]
Abstract
Kidney function and blood pressure homeostasis are regulated by purinergic signaling mechanisms. These autocrine/paracrine signaling pathways are initiated by the release of cellular ATP, which influences kidney hemodynamics and steady-state renin secretion from juxtaglomerular cells. However, the mechanism responsible for ATP release that supports tonic inputs to juxtaglomerular cells and regulates renin secretion remains unclear. Pannexin 1 (Panx1) channels localize to both afferent arterioles and juxtaglomerular cells and provide a transmembrane conduit for ATP release and ion permeability in the kidney and the vasculature. We hypothesized that Panx1 channels in renin-expressing cells regulate renin secretion in vivo. Using a renin cell-specific Panx1 knockout model, we found that male Panx1 deficient mice exhibiting a heightened activation of the renin-angiotensin-aldosterone system have markedly increased plasma renin and aldosterone concentrations, and elevated mean arterial pressure with altered peripheral hemodynamics. Following ovariectomy, female mice mirrored the male phenotype. Furthermore, constitutive Panx1 channel activity was observed in As4.1 renin-secreting cells, whereby Panx1 knockdown reduced extracellular ATP accumulation, lowered basal intracellular calcium concentrations and recapitulated a hyper-secretory renin phenotype. Moreover, in response to stress stimuli that lower blood pressure, Panx1-deficient mice exhibited aberrant "renin recruitment" as evidenced by reactivation of renin expression in pre-glomerular arteriolar smooth muscle cells. Thus, renin-cell Panx1 channels suppress renin secretion and influence adaptive renin responses when blood pressure homeostasis is threatened.
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Affiliation(s)
- Leon J DeLalio
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA; Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Ester Masati
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Suresh Mendu
- Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Claire A Ruddiman
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA; Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Yang Yang
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA; Department of Pharmacology, Dalian Medical University, Dalian, China
| | - Scott R Johnstone
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Jenna A Milstein
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - T C Stevenson Keller
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA; Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Rachel B Weaver
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Nick A Guagliardo
- Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Angela K Best
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Kodi S Ravichandran
- Department of Microbiology, Immunology, and Cancer, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Douglas A Bayliss
- Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Maria Luisa S Sequeira-Lopez
- Pediatric Center of Excellence in Nephrology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Swapnil N Sonkusare
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA; Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Xiaohong H Shu
- Department of Pharmacology, Dalian Medical University, Dalian, China
| | - Bimal Desai
- Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Paula Q Barrett
- Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Thu H Le
- Department of Medicine, Division of Nephrology, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA
| | - R Ariel Gomez
- Pediatric Center of Excellence in Nephrology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia, USA; Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, Virginia, USA.
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Garcia V, Park EJ, Siragusa M, Frohlich F, Mahfuzul Haque M, Pascale JV, Heberlein KR, Isakson BE, Stuehr DJ, Sessa WC. Unbiased proteomics identifies plasminogen activator inhibitor-1 as a negative regulator of endothelial nitric oxide synthase. Proc Natl Acad Sci U S A 2020; 117:9497-9507. [PMID: 32300005 PMCID: PMC7196906 DOI: 10.1073/pnas.1918761117] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Nitric oxide (NO) produced by endothelial nitric oxide synthase (eNOS) is a critical mediator of vascular function. eNOS is tightly regulated at various levels, including transcription, co- and posttranslational modifications, and by various protein-protein interactions. Using stable isotope labeling with amino acids in cell culture (SILAC) and mass spectrometry (MS), we identified several eNOS interactors, including the protein plasminogen activator inhibitor-1 (PAI-1). In cultured human umbilical vein endothelial cells (HUVECs), PAI-1 and eNOS colocalize and proximity ligation assays demonstrate a protein-protein interaction between PAI-1 and eNOS. Knockdown of PAI-1 or eNOS eliminates the proximity ligation assay (PLA) signal in endothelial cells. Overexpression of eNOS and HA-tagged PAI-1 in COS7 cells confirmed the colocalization observations in HUVECs. Furthermore, the source of intracellular PAI-1 interacting with eNOS was shown to be endocytosis derived. The interaction between PAI-1 and eNOS is a direct interaction as supported in experiments with purified proteins. Moreover, PAI-1 directly inhibits eNOS activity, reducing NO synthesis, and the knockdown or antagonism of PAI-1 increases NO bioavailability. Taken together, these findings place PAI-1 as a negative regulator of eNOS and disruptions in eNOS-PAI-1 binding promote increases in NO production and enhance vasodilation in vivo.
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Affiliation(s)
- Victor Garcia
- Vascular Biology and Therapeutics Program, Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520
| | - Eon Joo Park
- Vascular Biology and Therapeutics Program, Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520
| | - Mauro Siragusa
- Institute for Vascular Signaling, Centre for Molecular Medicine, Goethe University, 60596 Frankfurt am Main, Germany
| | - Florian Frohlich
- Vascular Biology and Therapeutics Program, Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520
- Department of Biology/Chemistry, Molecular Membrane Biology Section, University of Osnabrück, 49076 Osnabrück, Germany
| | - Mohammad Mahfuzul Haque
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195
| | - Jonathan V Pascale
- Department of Pharmacology, New York Medical College, Valhalla, NY 10595
| | - Katherine R Heberlein
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908
| | - Dennis J Stuehr
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195
| | - William C Sessa
- Vascular Biology and Therapeutics Program, Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520;
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Ottolini M, Hong K, Cope EL, Daneva Z, DeLalio LJ, Sokolowski JD, Marziano C, Nguyen NY, Altschmied J, Haendeler J, Johnstone SR, Kalani MY, Park MS, Patel RP, Liedtke W, Isakson BE, Sonkusare SK. Local Peroxynitrite Impairs Endothelial Transient Receptor Potential Vanilloid 4 Channels and Elevates Blood Pressure in Obesity. Circulation 2020; 141:1318-1333. [PMID: 32008372 PMCID: PMC7195859 DOI: 10.1161/circulationaha.119.043385] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND Impaired endothelium-dependent vasodilation is a hallmark of obesity-induced hypertension. The recognition that Ca2+ signaling in endothelial cells promotes vasodilation has led to the hypothesis that endothelial Ca2+ signaling is compromised during obesity, but the underlying abnormality is unknown. In this regard, transient receptor potential vanilloid 4 (TRPV4) ion channels are a major Ca2+ influx pathway in endothelial cells, and regulatory protein AKAP150 (A-kinase anchoring protein 150) enhances the activity of TRPV4 channels. METHODS We used endothelium-specific knockout mice and high-fat diet-fed mice to assess the role of endothelial AKAP150-TRPV4 signaling in blood pressure regulation under normal and obese conditions. We further determined the role of peroxynitrite, an oxidant molecule generated from the reaction between nitric oxide and superoxide radicals, in impairing endothelial AKAP150-TRPV4 signaling in obesity and assessed the effectiveness of peroxynitrite inhibition in rescuing endothelial AKAP150-TRPV4 signaling in obesity. The clinical relevance of our findings was evaluated in arteries from nonobese and obese individuals. RESULTS We show that Ca2+ influx through TRPV4 channels at myoendothelial projections to smooth muscle cells decreases resting blood pressure in nonobese mice, a response that is diminished in obese mice. Counterintuitively, release of the vasodilator molecule nitric oxide attenuated endothelial TRPV4 channel activity and vasodilation in obese animals. Increased activities of inducible nitric oxide synthase and NADPH oxidase 1 enzymes at myoendothelial projections in obese mice generated higher levels of nitric oxide and superoxide radicals, resulting in increased local peroxynitrite formation and subsequent oxidation of the regulatory protein AKAP150 at cysteine 36, to impair AKAP150-TRPV4 channel signaling at myoendothelial projections. Strategies that lowered peroxynitrite levels prevented cysteine 36 oxidation of AKAP150 and rescued endothelial AKAP150-TRPV4 signaling, vasodilation, and blood pressure in obesity. Peroxynitrite-dependent impairment of endothelial TRPV4 channel activity and vasodilation was also observed in the arteries from obese patients. CONCLUSIONS These data suggest that a spatially restricted impairment of endothelial TRPV4 channels contributes to obesity-induced hypertension and imply that inhibiting peroxynitrite might represent a strategy for normalizing endothelial TRPV4 channel activity, vasodilation, and blood pressure in obesity.
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Affiliation(s)
- Matteo Ottolini
- Robert M. Berne Cardiovascular Research Center, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
- Department of Pharmacology, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
| | - Kwangseok Hong
- Robert M. Berne Cardiovascular Research Center, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
| | - Eric L. Cope
- Robert M. Berne Cardiovascular Research Center, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
| | - Zdravka Daneva
- Robert M. Berne Cardiovascular Research Center, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
| | - Leon J. DeLalio
- Robert M. Berne Cardiovascular Research Center, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
| | - Jennifer D. Sokolowski
- Department of Neurological Surgery, University of Virginia, Charlottesville, VA, 22908, USA
| | - Corina Marziano
- Robert M. Berne Cardiovascular Research Center, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
- Department of Molecular Physiology and Biological Physics, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
| | - Nhiem Y. Nguyen
- Robert M. Berne Cardiovascular Research Center, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
| | - Joachim Altschmied
- IUF-Leibniz Research Institute for Environmental Medicine, Duesseldorf, 40021, Germany
| | - Judith Haendeler
- IUF-Leibniz Research Institute for Environmental Medicine, Duesseldorf, 40021, Germany
- Institute of Clinical Chemistry and Laboratory Diagnostic, Medical Faculty, University of Duesseldorf, Duesseldorf, 40021, Germany
| | - Scott R. Johnstone
- Robert M. Berne Cardiovascular Research Center, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
| | - Mohammad Y. Kalani
- Department of Neurological Surgery, University of Virginia, Charlottesville, VA, 22908, USA
| | - Min S. Park
- Department of Neurological Surgery, University of Virginia, Charlottesville, VA, 22908, USA
| | - Rakesh P. Patel
- Department of Pathology and Center for Free Radical Biology, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - Wolfgang Liedtke
- Department of Neurology, Duke University School of Medicine, Durham, NC, 27710, USA
| | - Brant E. Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
- Department of Molecular Physiology and Biological Physics, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
| | - Swapnil K. Sonkusare
- Robert M. Berne Cardiovascular Research Center, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
- Department of Pharmacology, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
- Department of Molecular Physiology and Biological Physics, University of Virginia-School of Medicine, Charlottesville, VA, 22908, USA
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48
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Yang Y, Delalio LJ, Best AK, Macal E, Milstein J, Donnelly I, Miller AM, McBride M, Shu X, Koval M, Isakson BE, Johnstone SR. Endothelial Pannexin 1 Channels Control Inflammation by Regulating Intracellular Calcium. J Immunol 2020; 204:2995-3007. [PMID: 32312847 PMCID: PMC7336877 DOI: 10.4049/jimmunol.1901089] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 03/27/2020] [Indexed: 12/26/2022]
Abstract
The proinflammatory cytokine IL-1β is a significant risk factor in cardiovascular disease that can be targeted to reduce major cardiovascular events. IL-1β expression and release are tightly controlled by changes in intracellular Ca2+ ([Ca2+]i), which has been associated with ATP release and purinergic signaling. Despite this, the mechanisms that regulate these changes have not been identified. The pannexin 1 (Panx1) channels have canonically been implicated in ATP release, especially during inflammation. We examined Panx1 in human umbilical vein endothelial cells following treatment with the proinflammatory cytokine TNF-α. Analysis by whole transcriptome sequencing and immunoblot identified a dramatic increase in Panx1 mRNA and protein expression that is regulated in an NF-κB-dependent manner. Furthermore, genetic inhibition of Panx1 reduced the expression and release of IL-1β. We initially hypothesized that increased Panx1-mediated ATP release acted in a paracrine fashion to control cytokine expression. However, our data demonstrate that IL-1β expression was not altered after direct ATP stimulation in human umbilical vein endothelial cells. Because Panx1 forms a large pore channel, we hypothesized it may permit Ca2+ diffusion into the cell to regulate IL-1β. High-throughput flow cytometric analysis demonstrated that TNF-α treatments lead to elevated [Ca2+]i, corresponding with Panx1 membrane localization. Genetic or pharmacological inhibition of Panx1 reduced TNF-α-associated increases in [Ca2+]i, blocked phosphorylation of the NF-κB-p65 protein, and reduced IL-1β transcription. Taken together, the data in our study provide the first evidence, to our knowledge, that [Ca2+]i regulation via the Panx1 channel induces a feed-forward effect on NF-κB to regulate IL-1β synthesis and release in endothelium during inflammation.
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Affiliation(s)
- Yang Yang
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908.,Department of Pharmacology, Dalian Medical University, Dalian 116044, China
| | - Leon J Delalio
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908
| | - Angela K Best
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908
| | - Edgar Macal
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908
| | - Jenna Milstein
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908
| | - Iona Donnelly
- British Heart Foundation Cardiovascular Research Centre, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8TA, United Kingdom
| | - Ashley M Miller
- British Heart Foundation Cardiovascular Research Centre, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8TA, United Kingdom
| | - Martin McBride
- British Heart Foundation Cardiovascular Research Centre, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8TA, United Kingdom
| | - Xiaohong Shu
- Department of Pharmacology, Dalian Medical University, Dalian 116044, China
| | - Michael Koval
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University School of Medicine, Atlanta, GA 30322.,Department of Cell Biology, Emory University School of Medicine, Atlanta, GA 30322; and
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908; .,Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA 22908
| | - Scott R Johnstone
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908;
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49
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McCallinhart PE, Wani E, Biwer LA, Wolpe AG, Isakson BE, Lilly B, Trask AJ. Myoendothelial Junctions of Mature Coronary Vessels Express Notch Signaling Proteins. FASEB J 2020. [DOI: 10.1096/fasebj.2020.34.s1.05120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Elsa Wani
- The Abigail Wexner Research Institute at Nationwide Children's Hospital
| | | | | | | | - Brenda Lilly
- The Abigail Wexner Research Institute at Nationwide Children's Hospital
| | - Aaron J. Trask
- The Abigail Wexner Research Institute at Nationwide Children's Hospital
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50
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Ruddiman CA, Corliss BA, Peirce SM, Isakson BE. Quantitatively defining spatial patterns of myoendothelial junctions in the arterial wall. FASEB J 2020. [DOI: 10.1096/fasebj.2020.34.s1.05128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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