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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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2
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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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3
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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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4
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Abstract
RATIONALE Resistance arteries and conduit arteries rely on different relative contributions of endothelial-derived hyperpolarization versus nitric oxide to achieve dilatory heterocellular signaling. Anatomically, resistance arteries use myoendothelial junctions (MEJs), endothelial cell projections that make contact with smooth muscle cells. Conduit arteries have very few to no MEJs. OBJECTIVE Determine if the presence of MEJs in conduit arteries can alter heterocellular signaling. METHODS AND RESULTS We previously demonstrated that PAI-1 (plasminogen activator inhibitor-1) can regulate formation of MEJs. Thus, we applied pluronic gel containing PAI-1 directly to conduit arteries (carotid arteries) to determine if this could induce formation of MEJs. We found a significant increase in endothelial cell projections resembling MEJs that correlated with increased biocytin dye transfer from endothelial cells to smooth muscle cells. Next, we used pressure myography to investigate whether these structural changes were accompanied by a functional change in vasodilatory signaling. Interestingly, PAI-1-treated carotids underwent a switch from a conduit to resistance artery vasodilatory profile via diminished nitric oxide signaling and increased endothelial-derived hyperpolarization signaling in response to the endothelium-dependent agonists acetylcholine and NS309. After PAI-1 application, we also found a significant increase in carotid expression of endothelial alpha globin, a protein predominantly expressed in resistance arteries. Carotids from mice with PAI-1, but lacking alpha globin (Hba1-/-), demonstrated that l-nitro-arginine methyl ester, an inhibitor of nitric oxide signaling, was able to prevent arterial relaxation. CONCLUSIONS The presence or absence of MEJs is an important determinant for influencing heterocellular communication in the arterial wall. In particular, alpha globin expression, induced within newly formed endothelial cell projections, may influence the balance between endothelial-derived hyperpolarization and nitric oxide-mediated vasodilation.
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Affiliation(s)
- Xiaohong Shu
- From the Robert M. Berne Cardiovascular Research Center (X.S., C.A.R., T.C.S.K., A.S.K., Y.Y., M.E.G., A.K.B., B.E.I.), University of Virginia School of Medicine, Charlottesville.,College of Pharmacy, Dalian Medical University, China (X.S., Y.Y.)
| | - Claire A Ruddiman
- From the Robert M. Berne Cardiovascular Research Center (X.S., C.A.R., T.C.S.K., A.S.K., Y.Y., M.E.G., A.K.B., B.E.I.), University of Virginia School of Medicine, Charlottesville.,Department of Pharmacology (C.A.R., A.S.K.), University of Virginia School of Medicine, Charlottesville
| | - T C Stevenson Keller
- From the Robert M. Berne Cardiovascular Research Center (X.S., C.A.R., T.C.S.K., A.S.K., Y.Y., M.E.G., A.K.B., B.E.I.), University of Virginia School of Medicine, Charlottesville.,Department of Molecular Physiology and Biophysics (T.C.S.K., B.E.I.), University of Virginia School of Medicine, Charlottesville
| | - Alexander S Keller
- From the Robert M. Berne Cardiovascular Research Center (X.S., C.A.R., T.C.S.K., A.S.K., Y.Y., M.E.G., A.K.B., B.E.I.), University of Virginia School of Medicine, Charlottesville.,Department of Pharmacology (C.A.R., A.S.K.), University of Virginia School of Medicine, Charlottesville
| | - Yang Yang
- From the Robert M. Berne Cardiovascular Research Center (X.S., C.A.R., T.C.S.K., A.S.K., Y.Y., M.E.G., A.K.B., B.E.I.), University of Virginia School of Medicine, Charlottesville.,College of Pharmacy, Dalian Medical University, China (X.S., Y.Y.)
| | - Miranda E Good
- From the Robert M. Berne Cardiovascular Research Center (X.S., C.A.R., T.C.S.K., A.S.K., Y.Y., M.E.G., A.K.B., B.E.I.), University of Virginia School of Medicine, Charlottesville
| | - Angela K Best
- From the Robert M. Berne Cardiovascular Research Center (X.S., C.A.R., T.C.S.K., A.S.K., Y.Y., M.E.G., A.K.B., B.E.I.), University of Virginia School of Medicine, Charlottesville
| | - Linda Columbus
- Department of Chemistry, University of Virginia, Charlottesville (L.C.)
| | - Brant E Isakson
- From the Robert M. Berne Cardiovascular Research Center (X.S., C.A.R., T.C.S.K., A.S.K., Y.Y., M.E.G., A.K.B., B.E.I.), University of Virginia School of Medicine, Charlottesville.,Department of Molecular Physiology and Biophysics (T.C.S.K., B.E.I.), University of Virginia School of Medicine, Charlottesville
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5
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Krüger N, Biwer LA, Good ME, Ruddiman CA, Wolpe AG, DeLalio LJ, Murphy S, Macal EH, Ragolia L, Serbulea V, Best AK, Leitinger N, Harris TE, Sonkusare SK, Gödecke A, Isakson BE. Loss of Endothelial FTO Antagonizes Obesity-Induced Metabolic and Vascular Dysfunction. Circ Res 2019; 126:232-242. [PMID: 31801409 PMCID: PMC7007767 DOI: 10.1161/circresaha.119.315531] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [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: 02/07/2023]
Abstract
RATIONALE Increasing prevalence of obesity and its associated risk with cardiovascular diseases demands a better understanding of the contribution of different cell types within this complex disease for developing new treatment options. Previous studies could prove a fundamental role of FTO (fat mass and obesity-associated protein) within obesity; however, its functional role within different cell types is less understood. OBJECTIVES We identify endothelial FTO as a previously unknown central regulator of both obesity-induced metabolic and vascular alterations. METHODS AND RESULTS We generated endothelial Fto-deficient mice and analyzed the impact of obesity on those mice. While the loss of endothelial FTO did not influence the development of obesity and dyslipidemia, it protected mice from high-fat diet-induced glucose intolerance and insulin resistance by increasing AKT (protein kinase B) phosphorylation in endothelial cells and skeletal muscle. Furthermore, loss of endothelial FTO prevented the development of obesity-induced hypertension by preserving myogenic tone in resistance arteries. In Fto-deficient arteries, microarray analysis identified upregulation of L-Pgds with significant increases in prostaglandin D2 levels. Blockade of prostaglandin D2 synthesis inhibited the myogenic tone protection in resistance arteries of endothelial Fto-deficient mice on high-fat diet; conversely, direct addition of prostaglandin D2 rescued myogenic tone in high-fat diet-fed control mice. Myogenic tone was increased in obese human arteries with FTO inhibitors or prostaglandin D2 application. CONCLUSIONS These data identify endothelial FTO as a previously unknown regulator in the development of obesity-induced metabolic and vascular changes, which is independent of its known function in regulation of obesity.
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Affiliation(s)
- Nenja Krüger
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine
- Institute of Animal Developmental and Molecular Biology, Heinrich Heine University Düsseldorf, Germany
| | - Lauren A Biwer
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, PO Box 801394, Charlottesville, VA 22908 USA
| | - Miranda E Good
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine
| | - Claire A. Ruddiman
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine
- Department of Pharmacology, University of Virginia School of Medicine
| | - Abigail G. Wolpe
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine
- Department of Cell Biology, University of Virginia School of Medicine
| | - Leon J DeLalio
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine
- Department of Pharmacology, University of Virginia School of Medicine
| | - Sara Murphy
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine
| | - Edgar H. Macal
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine
| | - Louis Ragolia
- Department of Biomedical Research, NYU Winthrop University Hospital, NYU Long Island School of Medicine
| | - Vlad Serbulea
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, PO Box 801394, Charlottesville, VA 22908 USA
| | - Angela K Best
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine
| | - Norbert Leitinger
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine
- Department of Pharmacology, University of Virginia School of Medicine
| | - Thurl E. Harris
- Department of Pharmacology, University of Virginia School of Medicine
| | - Swapnil K Sonkusare
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, PO Box 801394, Charlottesville, VA 22908 USA
| | - Axel Gödecke
- Institute of Cardiovascular Physiology, Heinrich Heine University Düsseldorf, Germany
| | - 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, PO Box 801394, Charlottesville, VA 22908 USA
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6
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DeLalio LJ, Keller AS, Chen J, Boyce AKJ, Artamonov MV, Askew-Page HR, Keller TCS, Johnstone SR, Weaver RB, Good ME, Murphy SA, Best AK, Mintz EL, Penuela S, Greenwood IA, Machado RF, Somlyo AV, Swayne LA, Minshall RD, Isakson BE. Interaction Between Pannexin 1 and Caveolin-1 in Smooth Muscle Can Regulate Blood Pressure. Arterioscler Thromb Vasc Biol 2019; 38:2065-2078. [PMID: 30026274 DOI: 10.1161/atvbaha.118.311290] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Objective- Sympathetic nerve innervation of vascular smooth muscle cells (VSMCs) is a major regulator of arteriolar vasoconstriction, vascular resistance, and blood pressure. Importantly, α-adrenergic receptor stimulation, which uniquely couples with Panx1 (pannexin 1) channel-mediated ATP release in resistance arteries, also requires localization to membrane caveolae. Here, we test whether localization of Panx1 to Cav1 (caveolin-1) promotes channel function (stimulus-dependent ATP release and adrenergic vasoconstriction) and is important for blood pressure homeostasis. Approach and Results- We use in vitro VSMC culture models, ex vivo resistance arteries, and a novel inducible VSMC-specific Cav1 knockout mouse to probe interactions between Panx1 and Cav1. We report that Panx1 and Cav1 colocalized on the VSMC plasma membrane of resistance arteries near sympathetic nerves in an adrenergic stimulus-dependent manner. Genetic deletion of Cav1 significantly blunts adrenergic-stimulated ATP release and vasoconstriction, with no direct influence on endothelium-dependent vasodilation or cardiac function. A significant reduction in mean arterial pressure (total=4 mm Hg; night=7 mm Hg) occurred in mice deficient for VSMC Cav1. These animals were resistant to further blood pressure lowering using a Panx1 peptide inhibitor Px1IL2P, which targets an intracellular loop region necessary for channel function. Conclusions- Translocalization of Panx1 to Cav1-enriched caveolae in VSMCs augments the release of purinergic stimuli necessary for proper adrenergic-mediated vasoconstriction and blood pressure homeostasis.
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Affiliation(s)
- Leon J DeLalio
- From the Robert M. Berne Cardiovascular Research Center (L.J.D., A.S.K., H.R.A.-P., T.C.S.K., S.R.J., R.B.W., M.E.G., S.A.M., A.K.B., B.E.I.).,Department of Pharmacology (L.J.D., A.S.K.), University of Virginia School of Medicine, Charlottesville
| | - Alexander S Keller
- From the Robert M. Berne Cardiovascular Research Center (L.J.D., A.S.K., H.R.A.-P., T.C.S.K., S.R.J., R.B.W., M.E.G., S.A.M., A.K.B., B.E.I.).,Department of Pharmacology (L.J.D., A.S.K.), University of Virginia School of Medicine, Charlottesville
| | | | - Andrew K J Boyce
- Division of Medical Sciences, Centre for Biomedical Research, University of Victoria, British Columbia, Canada (A.K.J.B., L.A.S.)
| | - Mykhaylo V Artamonov
- Department of Molecular Physiology and Biophysics, University of Virginia, Charlottesville (M.V.A., T.C.S.K., A.V.S., B.E.I.)
| | - Henry R Askew-Page
- From the Robert M. Berne Cardiovascular Research Center (L.J.D., A.S.K., H.R.A.-P., T.C.S.K., S.R.J., R.B.W., M.E.G., S.A.M., A.K.B., B.E.I.)
| | - T C Stevenson Keller
- From the Robert M. Berne Cardiovascular Research Center (L.J.D., A.S.K., H.R.A.-P., T.C.S.K., S.R.J., R.B.W., M.E.G., S.A.M., A.K.B., B.E.I.).,Department of Molecular Physiology and Biophysics, University of Virginia, Charlottesville (M.V.A., T.C.S.K., A.V.S., B.E.I.)
| | - Scott R Johnstone
- From the Robert M. Berne Cardiovascular Research Center (L.J.D., A.S.K., H.R.A.-P., T.C.S.K., S.R.J., R.B.W., M.E.G., S.A.M., A.K.B., B.E.I.)
| | - Rachel B Weaver
- From the Robert M. Berne Cardiovascular Research Center (L.J.D., A.S.K., H.R.A.-P., T.C.S.K., S.R.J., R.B.W., M.E.G., S.A.M., A.K.B., B.E.I.)
| | - Miranda E Good
- From the Robert M. Berne Cardiovascular Research Center (L.J.D., A.S.K., H.R.A.-P., T.C.S.K., S.R.J., R.B.W., M.E.G., S.A.M., A.K.B., B.E.I.)
| | - Sara A Murphy
- From the Robert M. Berne Cardiovascular Research Center (L.J.D., A.S.K., H.R.A.-P., T.C.S.K., S.R.J., R.B.W., M.E.G., S.A.M., A.K.B., B.E.I.)
| | - Angela K Best
- From the Robert M. Berne Cardiovascular Research Center (L.J.D., A.S.K., H.R.A.-P., T.C.S.K., S.R.J., R.B.W., M.E.G., S.A.M., A.K.B., B.E.I.)
| | - Ellen L Mintz
- Department of Biomedical Engineering, University of Virginia School of Engineering, Charlottesville (E.L.M.)
| | - Silvia Penuela
- Department of Anatomy and Cell Biology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Canada (S.P.)
| | - Iain A Greenwood
- Molecular and Clinical Sciences Research Institute, St. George's University London, United Kingdom (I.A.G.)
| | - Roberto F Machado
- Division of Pulmonary, Critical Care, Sleep, and Occupational Medicine, Indiana University School of Medicine, Indianapolis (R.F.M.)
| | - Avril V Somlyo
- Department of Molecular Physiology and Biophysics, University of Virginia, Charlottesville (M.V.A., T.C.S.K., A.V.S., B.E.I.)
| | - Leigh Anne Swayne
- Division of Medical Sciences, Centre for Biomedical Research, University of Victoria, British Columbia, Canada (A.K.J.B., L.A.S.)
| | - Richard D Minshall
- Department of Pharmacology and Department of Anesthesiology (R.D.M.), The University of Illinois at Chicago
| | - Brant E Isakson
- From the Robert M. Berne Cardiovascular Research Center (L.J.D., A.S.K., H.R.A.-P., T.C.S.K., S.R.J., R.B.W., M.E.G., S.A.M., A.K.B., B.E.I.).,Department of Molecular Physiology and Biophysics, University of Virginia, Charlottesville (M.V.A., T.C.S.K., A.V.S., B.E.I.)
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7
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Keller AS, Brooks S, Islam A, Keller TS, Best AK, Murphy S, Page HA, Cortese‐Krott MM, Yan Z, Ackerman H, Isakson BE. Endothelial
Hba1
Regulates Exercise Fitness in Mice. FASEB J 2019. [DOI: 10.1096/fasebj.2019.33.1_supplement.684.7] [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)
- Alexander S Keller
- Department of PharmacologyUniversity of VirginiaCharlottesvilleVA
- Robert M. Berne Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | - Steven Brooks
- National Institute of Allergy and Infectious DiseasesNational Institutes of HealthBethesdaMD
| | - Aditi Islam
- Robert M. Berne Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | - T.C. Stevenson Keller
- Robert M. Berne Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
- Department of Molecular Physiology and Biological PhysicsUniversity of VirginiaCharlottesvilleVA
| | - Angela K Best
- Robert M. Berne Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | - Sara Murphy
- Robert M. Berne Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | - Henry Askew Page
- Robert M. Berne Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | - Miriam M Cortese‐Krott
- Division of Cardiology, Pneumology, and Vascular MedicineHeinrich Heine University of DusseldorfDüsseldorfGermany
| | - Zhen Yan
- Robert M. Berne Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | - Hans Ackerman
- National Institute of Allergy and Infectious DiseasesNational Institutes of HealthBethesdaMD
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
- Department of Molecular Physiology and Biological PhysicsUniversity of VirginiaCharlottesvilleVA
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8
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Ruddiman CA, Shu XH, Keller TS, Keller AS, Yang Y, Good ME, Best AK, Columbus L, Isakson BE. Heterocellular contact can dictate arterial function. FASEB J 2019. [DOI: 10.1096/fasebj.2019.33.1_supplement.682.4] [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)
- Claire A. Ruddiman
- Robert M. Berne Cardiovascular Research CenterUniversity of Virginia School of MedicineCharlottesvilleVA
- Department of PharmacologyUniversity of Virginia School of MedicineCharlottesvilleVA
| | - Xiaohong H. Shu
- Robert M. Berne Cardiovascular Research CenterUniversity of Virginia School of MedicineCharlottesvilleVA
- Department of PharmacologyDalian Medical UniversityLiaoning ShengPeople's Republic of China
| | - T.C. Stevenson Keller
- Robert M. Berne Cardiovascular Research CenterUniversity of Virginia School of MedicineCharlottesvilleVA
- Department of Molecular Physiology and BiophysicsUniversity of Virginia School of MedicineCharlottesvilleVA
| | - Alexander S. Keller
- Robert M. Berne Cardiovascular Research CenterUniversity of Virginia School of MedicineCharlottesvilleVA
- Department of PharmacologyUniversity of Virginia School of MedicineCharlottesvilleVA
| | - Yang Yang
- Robert M. Berne Cardiovascular Research CenterUniversity of Virginia School of MedicineCharlottesvilleVA
- Department of PharmacologyDalian Medical UniversityLiaoning ShengPeople's Republic of China
| | - Miranda E. Good
- Robert M. Berne Cardiovascular Research CenterUniversity of Virginia School of MedicineCharlottesvilleVA
| | - Angela K. Best
- Robert M. Berne Cardiovascular Research CenterUniversity of Virginia School of MedicineCharlottesvilleVA
| | - Linda Columbus
- Department of ChemistryUniversity of VirginiaCharlottesvilleVA
| | - Brant E. Isakson
- Robert M. Berne Cardiovascular Research CenterUniversity of Virginia School of MedicineCharlottesvilleVA
- Department of Molecular Physiology and BiophysicsUniversity of Virginia School of MedicineCharlottesvilleVA
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9
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DeLalio LJ, Billaud M, Ruddiman CA, Johnstone SR, Butcher JT, Wolpe AG, Jin X, Keller TCS, Keller AS, Rivière T, Good ME, Best AK, Lohman AW, Swayne LA, Penuela S, Thompson RJ, Lampe PD, Yeager M, Isakson BE. Constitutive SRC-mediated phosphorylation of pannexin 1 at tyrosine 198 occurs at the plasma membrane. J Biol Chem 2019; 294:6940-6956. [PMID: 30814251 DOI: 10.1074/jbc.ra118.006982] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 02/15/2019] [Indexed: 11/06/2022] Open
Abstract
Pannexin 1 (PANX1)-mediated ATP release in vascular smooth muscle coordinates α1-adrenergic receptor (α1-AR) vasoconstriction and blood pressure homeostasis. We recently identified amino acids 198-200 (YLK) on the PANX1 intracellular loop that are critical for α1-AR-mediated vasoconstriction and PANX1 channel function. We report herein that the YLK motif is contained within an SRC homology 2 domain and is directly phosphorylated by SRC proto-oncogene, nonreceptor tyrosine kinase (SRC) at Tyr198 We demonstrate that PANX1-mediated ATP release occurs independently of intracellular calcium but is sensitive to SRC family kinase (SFK) inhibition, suggestive of channel regulation by tyrosine phosphorylation. Using a PANX1 Tyr198-specific antibody, SFK inhibitors, SRC knockdown, temperature-dependent SRC cells, and kinase assays, we found that PANX1-mediated ATP release and vasoconstriction involves constitutive phosphorylation of PANX1 Tyr198 by SRC. We specifically detected SRC-mediated Tyr198 phosphorylation at the plasma membrane and observed that it is not enhanced or induced by α1-AR activation. Last, we show that PANX1 immunostaining is enriched in the smooth muscle layer of arteries from hypertensive humans and that Tyr198 phosphorylation is detectable in these samples, indicative of a role for membrane-associated PANX1 in small arteries of hypertensive humans. Our discovery adds insight into the regulation of PANX1 by post-translational modifications and connects a significant purinergic vasoconstriction pathway with a previously identified, yet unexplored, tyrosine kinase-based α1-AR constriction mechanism. This work implicates SRC-mediated PANX1 function in normal vascular hemodynamics and suggests that Tyr198-phosphorylated PANX1 is involved in hypertensive vascular pathology.
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Affiliation(s)
- Leon J DeLalio
- From the Robert M. Berne Cardiovascular Research Center.,Department of Pharmacology
| | - Marie Billaud
- the Department of Cardiothoracic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15213
| | - Claire A Ruddiman
- From the Robert M. Berne Cardiovascular Research Center.,Department of Pharmacology
| | | | - Joshua T Butcher
- the Department of Physiology, Augusta University, Augusta, Georgia 30912
| | - Abigail G Wolpe
- From the Robert M. Berne Cardiovascular Research Center.,Department of Cell Biology, and
| | - Xueyao Jin
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, Virginia 22908
| | - T C Stevenson Keller
- From the Robert M. Berne Cardiovascular Research Center.,Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, Virginia 22908
| | - Alexander S Keller
- From the Robert M. Berne Cardiovascular Research Center.,Department of Pharmacology
| | - Thibaud Rivière
- the Department of Life and Health Sciences, University of Bordeaux, 33000 Bordeaux, France
| | | | - Angela K Best
- From the Robert M. Berne Cardiovascular Research Center
| | - Alexander W Lohman
- the Hotchkiss Brain Institute and.,Department of Cell Biology and Anatomy, University of Calgary, Calgary, Alberta T2N 4N1, Canada
| | - Leigh Anne Swayne
- the Division of Medical Sciences, Centre for Biomedical Research, University of Victoria, Victoria, British Columbia V8P 5C2, Canada
| | - Silvia Penuela
- the Departments of Anatomy and Cell Biology and Oncology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario N6A 3K7, Canada, and
| | - Roger J Thompson
- the Hotchkiss Brain Institute and.,Department of Cell Biology and Anatomy, University of Calgary, Calgary, Alberta T2N 4N1, Canada
| | - Paul D Lampe
- the Fred Hutchinson Cancer Research Center, Seattle, Washington 98109
| | - Mark Yeager
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, Virginia 22908
| | - Brant E Isakson
- From the Robert M. Berne Cardiovascular Research Center, .,Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, Virginia 22908
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10
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Keller AS, Brooks S, Islam A, Keller TCS, Best AK, Cortese‐Krott MK, Yan Z, Ackerman H, Isakson BE. Inducible Deletion of Endothelial
Hba1
Significantly Reduces Exercise Fitness in Mice. FASEB J 2018. [DOI: 10.1096/fasebj.2018.32.1_supplement.845.2] [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)
- Alexander S. Keller
- Robert M. Berne Cardiovascular Research CenterDepartment of PharmacologyUniversity of VirginiaCharlottesvilleVA
| | - Steven Brooks
- Physiology Section, National Heart, Lungand Blood InstituteBethesdaMD
| | | | - TC Stevenson Keller
- Robert M. Berne Cardiovascular Research CenterDepartment of Molecular Physiology and Biological PhysicsUniversity of VirginiaCharlottesvilleVA
| | - Angela K. Best
- Robert M. Berne Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | - Miriam K. Cortese‐Krott
- Cardiovascular Research LaboratoryDivision of Cardiology, Pneumology, and Vascular MedicineHeinrich Heine University of DüsseldorfDusseldorfGermany
| | - Zhen Yan
- Robert M. Berne Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | - Hans Ackerman
- Physiology Section, National Heart, Lungand Blood InstituteBethesdaMD
| | - Brant E. Isakson
- Robert M. Berne Cardiovascular Research CenterDepartment of Molecular Physiology and Biological PhysicsUniversity of VirginiaCharlottesvilleVA
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11
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Keller TCS, Butcher JT, Broseghini-Filho GB, Marziano C, DeLalio LJ, Rogers S, Ning B, Martin JN, Chechova S, Cabot M, Shu X, Best AK, Good ME, Simão Padilha A, Purdy M, Yeager M, Peirce SM, Hu S, Doctor A, Barrett E, Le TH, Columbus L, Isakson BE. Modulating Vascular Hemodynamics With an Alpha Globin Mimetic Peptide (HbαX). Hypertension 2016; 68:1494-1503. [PMID: 27802421 DOI: 10.1161/hypertensionaha.116.08171] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 07/22/2016] [Accepted: 10/04/2016] [Indexed: 02/07/2023]
Abstract
The ability of hemoglobin to scavenge the potent vasodilator nitric oxide (NO) in the blood has been well established as a mechanism of vascular tone homeostasis. In endothelial cells, the alpha chain of hemoglobin (hereafter, alpha globin) and endothelial NO synthase form a macromolecular complex, providing a sink for NO directly adjacent to the production source. We have developed an alpha globin mimetic peptide (named HbαX) that displaces endogenous alpha globin and increases bioavailable NO for vasodilation. Here we show that, in vivo, HbαX administration increases capillary oxygenation and blood flow in arterioles acutely and produces a sustained decrease in systolic blood pressure in normal and angiotensin II-induced hypertensive states. HbαX acts with high specificity and affinity to endothelial NO synthase, without toxicity to liver and kidney and no effect on p50 of O2 binding in red blood cells. In human vasculature, HbαX blunts vasoconstrictive response to cumulative doses of phenylephrine, a potent constricting agent. By binding to endothelial NO synthase and displacing endogenous alpha globin, HbαX modulates important metrics of vascular function, increasing vasodilation and flow in the resistance vasculature.
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Affiliation(s)
- T C Stevenson Keller
- From the Department of Molecular Physiology and Biological Physics (T.C.S.K., C.M., M.C., M.P., M.Y., B.E.I.), Robert M. Berne Cardiovascular Research Center (T.C.S.K., J.T.B., G.B.B.-F., C.M., L.J.D., X.S., A.K.B., M.E.G., B.E.I.), Department of Pharmacology (L.J.D.), Division of Nephrology, Department of Medicine (S.C., T.H.L.), and Division of Endocrinology, Department of Medicine (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Physiological Sciences, Federal University of Espirito Santa, Brazil (G.B.B.-F., A.S.P.); Departments of Pediatrics and Biochemistry, Washington University in Saint Louis, MO (S.R., A.D.); Department of Biomedical Engineering (B.N., S.M.P., S.H.) and Department of Chemistry (J.N.M., L.C.), University of Virginia, Charlottesville; and College of Pharmacy, Dalian Medical University, Dalian, China (X.S.)
| | - Joshua T Butcher
- From the Department of Molecular Physiology and Biological Physics (T.C.S.K., C.M., M.C., M.P., M.Y., B.E.I.), Robert M. Berne Cardiovascular Research Center (T.C.S.K., J.T.B., G.B.B.-F., C.M., L.J.D., X.S., A.K.B., M.E.G., B.E.I.), Department of Pharmacology (L.J.D.), Division of Nephrology, Department of Medicine (S.C., T.H.L.), and Division of Endocrinology, Department of Medicine (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Physiological Sciences, Federal University of Espirito Santa, Brazil (G.B.B.-F., A.S.P.); Departments of Pediatrics and Biochemistry, Washington University in Saint Louis, MO (S.R., A.D.); Department of Biomedical Engineering (B.N., S.M.P., S.H.) and Department of Chemistry (J.N.M., L.C.), University of Virginia, Charlottesville; and College of Pharmacy, Dalian Medical University, Dalian, China (X.S.)
| | - Gilson Brás Broseghini-Filho
- From the Department of Molecular Physiology and Biological Physics (T.C.S.K., C.M., M.C., M.P., M.Y., B.E.I.), Robert M. Berne Cardiovascular Research Center (T.C.S.K., J.T.B., G.B.B.-F., C.M., L.J.D., X.S., A.K.B., M.E.G., B.E.I.), Department of Pharmacology (L.J.D.), Division of Nephrology, Department of Medicine (S.C., T.H.L.), and Division of Endocrinology, Department of Medicine (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Physiological Sciences, Federal University of Espirito Santa, Brazil (G.B.B.-F., A.S.P.); Departments of Pediatrics and Biochemistry, Washington University in Saint Louis, MO (S.R., A.D.); Department of Biomedical Engineering (B.N., S.M.P., S.H.) and Department of Chemistry (J.N.M., L.C.), University of Virginia, Charlottesville; and College of Pharmacy, Dalian Medical University, Dalian, China (X.S.)
| | - Corina Marziano
- From the Department of Molecular Physiology and Biological Physics (T.C.S.K., C.M., M.C., M.P., M.Y., B.E.I.), Robert M. Berne Cardiovascular Research Center (T.C.S.K., J.T.B., G.B.B.-F., C.M., L.J.D., X.S., A.K.B., M.E.G., B.E.I.), Department of Pharmacology (L.J.D.), Division of Nephrology, Department of Medicine (S.C., T.H.L.), and Division of Endocrinology, Department of Medicine (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Physiological Sciences, Federal University of Espirito Santa, Brazil (G.B.B.-F., A.S.P.); Departments of Pediatrics and Biochemistry, Washington University in Saint Louis, MO (S.R., A.D.); Department of Biomedical Engineering (B.N., S.M.P., S.H.) and Department of Chemistry (J.N.M., L.C.), University of Virginia, Charlottesville; and College of Pharmacy, Dalian Medical University, Dalian, China (X.S.)
| | - Leon J DeLalio
- From the Department of Molecular Physiology and Biological Physics (T.C.S.K., C.M., M.C., M.P., M.Y., B.E.I.), Robert M. Berne Cardiovascular Research Center (T.C.S.K., J.T.B., G.B.B.-F., C.M., L.J.D., X.S., A.K.B., M.E.G., B.E.I.), Department of Pharmacology (L.J.D.), Division of Nephrology, Department of Medicine (S.C., T.H.L.), and Division of Endocrinology, Department of Medicine (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Physiological Sciences, Federal University of Espirito Santa, Brazil (G.B.B.-F., A.S.P.); Departments of Pediatrics and Biochemistry, Washington University in Saint Louis, MO (S.R., A.D.); Department of Biomedical Engineering (B.N., S.M.P., S.H.) and Department of Chemistry (J.N.M., L.C.), University of Virginia, Charlottesville; and College of Pharmacy, Dalian Medical University, Dalian, China (X.S.)
| | - Stephen Rogers
- From the Department of Molecular Physiology and Biological Physics (T.C.S.K., C.M., M.C., M.P., M.Y., B.E.I.), Robert M. Berne Cardiovascular Research Center (T.C.S.K., J.T.B., G.B.B.-F., C.M., L.J.D., X.S., A.K.B., M.E.G., B.E.I.), Department of Pharmacology (L.J.D.), Division of Nephrology, Department of Medicine (S.C., T.H.L.), and Division of Endocrinology, Department of Medicine (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Physiological Sciences, Federal University of Espirito Santa, Brazil (G.B.B.-F., A.S.P.); Departments of Pediatrics and Biochemistry, Washington University in Saint Louis, MO (S.R., A.D.); Department of Biomedical Engineering (B.N., S.M.P., S.H.) and Department of Chemistry (J.N.M., L.C.), University of Virginia, Charlottesville; and College of Pharmacy, Dalian Medical University, Dalian, China (X.S.)
| | - Bo Ning
- From the Department of Molecular Physiology and Biological Physics (T.C.S.K., C.M., M.C., M.P., M.Y., B.E.I.), Robert M. Berne Cardiovascular Research Center (T.C.S.K., J.T.B., G.B.B.-F., C.M., L.J.D., X.S., A.K.B., M.E.G., B.E.I.), Department of Pharmacology (L.J.D.), Division of Nephrology, Department of Medicine (S.C., T.H.L.), and Division of Endocrinology, Department of Medicine (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Physiological Sciences, Federal University of Espirito Santa, Brazil (G.B.B.-F., A.S.P.); Departments of Pediatrics and Biochemistry, Washington University in Saint Louis, MO (S.R., A.D.); Department of Biomedical Engineering (B.N., S.M.P., S.H.) and Department of Chemistry (J.N.M., L.C.), University of Virginia, Charlottesville; and College of Pharmacy, Dalian Medical University, Dalian, China (X.S.)
| | - Jennifer N Martin
- From the Department of Molecular Physiology and Biological Physics (T.C.S.K., C.M., M.C., M.P., M.Y., B.E.I.), Robert M. Berne Cardiovascular Research Center (T.C.S.K., J.T.B., G.B.B.-F., C.M., L.J.D., X.S., A.K.B., M.E.G., B.E.I.), Department of Pharmacology (L.J.D.), Division of Nephrology, Department of Medicine (S.C., T.H.L.), and Division of Endocrinology, Department of Medicine (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Physiological Sciences, Federal University of Espirito Santa, Brazil (G.B.B.-F., A.S.P.); Departments of Pediatrics and Biochemistry, Washington University in Saint Louis, MO (S.R., A.D.); Department of Biomedical Engineering (B.N., S.M.P., S.H.) and Department of Chemistry (J.N.M., L.C.), University of Virginia, Charlottesville; and College of Pharmacy, Dalian Medical University, Dalian, China (X.S.)
| | - Sylvia Chechova
- From the Department of Molecular Physiology and Biological Physics (T.C.S.K., C.M., M.C., M.P., M.Y., B.E.I.), Robert M. Berne Cardiovascular Research Center (T.C.S.K., J.T.B., G.B.B.-F., C.M., L.J.D., X.S., A.K.B., M.E.G., B.E.I.), Department of Pharmacology (L.J.D.), Division of Nephrology, Department of Medicine (S.C., T.H.L.), and Division of Endocrinology, Department of Medicine (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Physiological Sciences, Federal University of Espirito Santa, Brazil (G.B.B.-F., A.S.P.); Departments of Pediatrics and Biochemistry, Washington University in Saint Louis, MO (S.R., A.D.); Department of Biomedical Engineering (B.N., S.M.P., S.H.) and Department of Chemistry (J.N.M., L.C.), University of Virginia, Charlottesville; and College of Pharmacy, Dalian Medical University, Dalian, China (X.S.)
| | - Maya Cabot
- From the Department of Molecular Physiology and Biological Physics (T.C.S.K., C.M., M.C., M.P., M.Y., B.E.I.), Robert M. Berne Cardiovascular Research Center (T.C.S.K., J.T.B., G.B.B.-F., C.M., L.J.D., X.S., A.K.B., M.E.G., B.E.I.), Department of Pharmacology (L.J.D.), Division of Nephrology, Department of Medicine (S.C., T.H.L.), and Division of Endocrinology, Department of Medicine (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Physiological Sciences, Federal University of Espirito Santa, Brazil (G.B.B.-F., A.S.P.); Departments of Pediatrics and Biochemistry, Washington University in Saint Louis, MO (S.R., A.D.); Department of Biomedical Engineering (B.N., S.M.P., S.H.) and Department of Chemistry (J.N.M., L.C.), University of Virginia, Charlottesville; and College of Pharmacy, Dalian Medical University, Dalian, China (X.S.)
| | - Xiahong Shu
- From the Department of Molecular Physiology and Biological Physics (T.C.S.K., C.M., M.C., M.P., M.Y., B.E.I.), Robert M. Berne Cardiovascular Research Center (T.C.S.K., J.T.B., G.B.B.-F., C.M., L.J.D., X.S., A.K.B., M.E.G., B.E.I.), Department of Pharmacology (L.J.D.), Division of Nephrology, Department of Medicine (S.C., T.H.L.), and Division of Endocrinology, Department of Medicine (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Physiological Sciences, Federal University of Espirito Santa, Brazil (G.B.B.-F., A.S.P.); Departments of Pediatrics and Biochemistry, Washington University in Saint Louis, MO (S.R., A.D.); Department of Biomedical Engineering (B.N., S.M.P., S.H.) and Department of Chemistry (J.N.M., L.C.), University of Virginia, Charlottesville; and College of Pharmacy, Dalian Medical University, Dalian, China (X.S.)
| | - Angela K Best
- From the Department of Molecular Physiology and Biological Physics (T.C.S.K., C.M., M.C., M.P., M.Y., B.E.I.), Robert M. Berne Cardiovascular Research Center (T.C.S.K., J.T.B., G.B.B.-F., C.M., L.J.D., X.S., A.K.B., M.E.G., B.E.I.), Department of Pharmacology (L.J.D.), Division of Nephrology, Department of Medicine (S.C., T.H.L.), and Division of Endocrinology, Department of Medicine (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Physiological Sciences, Federal University of Espirito Santa, Brazil (G.B.B.-F., A.S.P.); Departments of Pediatrics and Biochemistry, Washington University in Saint Louis, MO (S.R., A.D.); Department of Biomedical Engineering (B.N., S.M.P., S.H.) and Department of Chemistry (J.N.M., L.C.), University of Virginia, Charlottesville; and College of Pharmacy, Dalian Medical University, Dalian, China (X.S.)
| | - Miranda E Good
- From the Department of Molecular Physiology and Biological Physics (T.C.S.K., C.M., M.C., M.P., M.Y., B.E.I.), Robert M. Berne Cardiovascular Research Center (T.C.S.K., J.T.B., G.B.B.-F., C.M., L.J.D., X.S., A.K.B., M.E.G., B.E.I.), Department of Pharmacology (L.J.D.), Division of Nephrology, Department of Medicine (S.C., T.H.L.), and Division of Endocrinology, Department of Medicine (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Physiological Sciences, Federal University of Espirito Santa, Brazil (G.B.B.-F., A.S.P.); Departments of Pediatrics and Biochemistry, Washington University in Saint Louis, MO (S.R., A.D.); Department of Biomedical Engineering (B.N., S.M.P., S.H.) and Department of Chemistry (J.N.M., L.C.), University of Virginia, Charlottesville; and College of Pharmacy, Dalian Medical University, Dalian, China (X.S.)
| | - Alessandra Simão Padilha
- From the Department of Molecular Physiology and Biological Physics (T.C.S.K., C.M., M.C., M.P., M.Y., B.E.I.), Robert M. Berne Cardiovascular Research Center (T.C.S.K., J.T.B., G.B.B.-F., C.M., L.J.D., X.S., A.K.B., M.E.G., B.E.I.), Department of Pharmacology (L.J.D.), Division of Nephrology, Department of Medicine (S.C., T.H.L.), and Division of Endocrinology, Department of Medicine (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Physiological Sciences, Federal University of Espirito Santa, Brazil (G.B.B.-F., A.S.P.); Departments of Pediatrics and Biochemistry, Washington University in Saint Louis, MO (S.R., A.D.); Department of Biomedical Engineering (B.N., S.M.P., S.H.) and Department of Chemistry (J.N.M., L.C.), University of Virginia, Charlottesville; and College of Pharmacy, Dalian Medical University, Dalian, China (X.S.)
| | - Michael Purdy
- From the Department of Molecular Physiology and Biological Physics (T.C.S.K., C.M., M.C., M.P., M.Y., B.E.I.), Robert M. Berne Cardiovascular Research Center (T.C.S.K., J.T.B., G.B.B.-F., C.M., L.J.D., X.S., A.K.B., M.E.G., B.E.I.), Department of Pharmacology (L.J.D.), Division of Nephrology, Department of Medicine (S.C., T.H.L.), and Division of Endocrinology, Department of Medicine (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Physiological Sciences, Federal University of Espirito Santa, Brazil (G.B.B.-F., A.S.P.); Departments of Pediatrics and Biochemistry, Washington University in Saint Louis, MO (S.R., A.D.); Department of Biomedical Engineering (B.N., S.M.P., S.H.) and Department of Chemistry (J.N.M., L.C.), University of Virginia, Charlottesville; and College of Pharmacy, Dalian Medical University, Dalian, China (X.S.)
| | - Mark Yeager
- From the Department of Molecular Physiology and Biological Physics (T.C.S.K., C.M., M.C., M.P., M.Y., B.E.I.), Robert M. Berne Cardiovascular Research Center (T.C.S.K., J.T.B., G.B.B.-F., C.M., L.J.D., X.S., A.K.B., M.E.G., B.E.I.), Department of Pharmacology (L.J.D.), Division of Nephrology, Department of Medicine (S.C., T.H.L.), and Division of Endocrinology, Department of Medicine (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Physiological Sciences, Federal University of Espirito Santa, Brazil (G.B.B.-F., A.S.P.); Departments of Pediatrics and Biochemistry, Washington University in Saint Louis, MO (S.R., A.D.); Department of Biomedical Engineering (B.N., S.M.P., S.H.) and Department of Chemistry (J.N.M., L.C.), University of Virginia, Charlottesville; and College of Pharmacy, Dalian Medical University, Dalian, China (X.S.)
| | - Shayn M Peirce
- From the Department of Molecular Physiology and Biological Physics (T.C.S.K., C.M., M.C., M.P., M.Y., B.E.I.), Robert M. Berne Cardiovascular Research Center (T.C.S.K., J.T.B., G.B.B.-F., C.M., L.J.D., X.S., A.K.B., M.E.G., B.E.I.), Department of Pharmacology (L.J.D.), Division of Nephrology, Department of Medicine (S.C., T.H.L.), and Division of Endocrinology, Department of Medicine (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Physiological Sciences, Federal University of Espirito Santa, Brazil (G.B.B.-F., A.S.P.); Departments of Pediatrics and Biochemistry, Washington University in Saint Louis, MO (S.R., A.D.); Department of Biomedical Engineering (B.N., S.M.P., S.H.) and Department of Chemistry (J.N.M., L.C.), University of Virginia, Charlottesville; and College of Pharmacy, Dalian Medical University, Dalian, China (X.S.)
| | - Song Hu
- From the Department of Molecular Physiology and Biological Physics (T.C.S.K., C.M., M.C., M.P., M.Y., B.E.I.), Robert M. Berne Cardiovascular Research Center (T.C.S.K., J.T.B., G.B.B.-F., C.M., L.J.D., X.S., A.K.B., M.E.G., B.E.I.), Department of Pharmacology (L.J.D.), Division of Nephrology, Department of Medicine (S.C., T.H.L.), and Division of Endocrinology, Department of Medicine (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Physiological Sciences, Federal University of Espirito Santa, Brazil (G.B.B.-F., A.S.P.); Departments of Pediatrics and Biochemistry, Washington University in Saint Louis, MO (S.R., A.D.); Department of Biomedical Engineering (B.N., S.M.P., S.H.) and Department of Chemistry (J.N.M., L.C.), University of Virginia, Charlottesville; and College of Pharmacy, Dalian Medical University, Dalian, China (X.S.)
| | - Allan Doctor
- From the Department of Molecular Physiology and Biological Physics (T.C.S.K., C.M., M.C., M.P., M.Y., B.E.I.), Robert M. Berne Cardiovascular Research Center (T.C.S.K., J.T.B., G.B.B.-F., C.M., L.J.D., X.S., A.K.B., M.E.G., B.E.I.), Department of Pharmacology (L.J.D.), Division of Nephrology, Department of Medicine (S.C., T.H.L.), and Division of Endocrinology, Department of Medicine (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Physiological Sciences, Federal University of Espirito Santa, Brazil (G.B.B.-F., A.S.P.); Departments of Pediatrics and Biochemistry, Washington University in Saint Louis, MO (S.R., A.D.); Department of Biomedical Engineering (B.N., S.M.P., S.H.) and Department of Chemistry (J.N.M., L.C.), University of Virginia, Charlottesville; and College of Pharmacy, Dalian Medical University, Dalian, China (X.S.)
| | - Eugene Barrett
- From the Department of Molecular Physiology and Biological Physics (T.C.S.K., C.M., M.C., M.P., M.Y., B.E.I.), Robert M. Berne Cardiovascular Research Center (T.C.S.K., J.T.B., G.B.B.-F., C.M., L.J.D., X.S., A.K.B., M.E.G., B.E.I.), Department of Pharmacology (L.J.D.), Division of Nephrology, Department of Medicine (S.C., T.H.L.), and Division of Endocrinology, Department of Medicine (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Physiological Sciences, Federal University of Espirito Santa, Brazil (G.B.B.-F., A.S.P.); Departments of Pediatrics and Biochemistry, Washington University in Saint Louis, MO (S.R., A.D.); Department of Biomedical Engineering (B.N., S.M.P., S.H.) and Department of Chemistry (J.N.M., L.C.), University of Virginia, Charlottesville; and College of Pharmacy, Dalian Medical University, Dalian, China (X.S.)
| | - Thu H Le
- From the Department of Molecular Physiology and Biological Physics (T.C.S.K., C.M., M.C., M.P., M.Y., B.E.I.), Robert M. Berne Cardiovascular Research Center (T.C.S.K., J.T.B., G.B.B.-F., C.M., L.J.D., X.S., A.K.B., M.E.G., B.E.I.), Department of Pharmacology (L.J.D.), Division of Nephrology, Department of Medicine (S.C., T.H.L.), and Division of Endocrinology, Department of Medicine (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Physiological Sciences, Federal University of Espirito Santa, Brazil (G.B.B.-F., A.S.P.); Departments of Pediatrics and Biochemistry, Washington University in Saint Louis, MO (S.R., A.D.); Department of Biomedical Engineering (B.N., S.M.P., S.H.) and Department of Chemistry (J.N.M., L.C.), University of Virginia, Charlottesville; and College of Pharmacy, Dalian Medical University, Dalian, China (X.S.)
| | - Linda Columbus
- From the Department of Molecular Physiology and Biological Physics (T.C.S.K., C.M., M.C., M.P., M.Y., B.E.I.), Robert M. Berne Cardiovascular Research Center (T.C.S.K., J.T.B., G.B.B.-F., C.M., L.J.D., X.S., A.K.B., M.E.G., B.E.I.), Department of Pharmacology (L.J.D.), Division of Nephrology, Department of Medicine (S.C., T.H.L.), and Division of Endocrinology, Department of Medicine (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Physiological Sciences, Federal University of Espirito Santa, Brazil (G.B.B.-F., A.S.P.); Departments of Pediatrics and Biochemistry, Washington University in Saint Louis, MO (S.R., A.D.); Department of Biomedical Engineering (B.N., S.M.P., S.H.) and Department of Chemistry (J.N.M., L.C.), University of Virginia, Charlottesville; and College of Pharmacy, Dalian Medical University, Dalian, China (X.S.)
| | - Brant E Isakson
- From the Department of Molecular Physiology and Biological Physics (T.C.S.K., C.M., M.C., M.P., M.Y., B.E.I.), Robert M. Berne Cardiovascular Research Center (T.C.S.K., J.T.B., G.B.B.-F., C.M., L.J.D., X.S., A.K.B., M.E.G., B.E.I.), Department of Pharmacology (L.J.D.), Division of Nephrology, Department of Medicine (S.C., T.H.L.), and Division of Endocrinology, Department of Medicine (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Physiological Sciences, Federal University of Espirito Santa, Brazil (G.B.B.-F., A.S.P.); Departments of Pediatrics and Biochemistry, Washington University in Saint Louis, MO (S.R., A.D.); Department of Biomedical Engineering (B.N., S.M.P., S.H.) and Department of Chemistry (J.N.M., L.C.), University of Virginia, Charlottesville; and College of Pharmacy, Dalian Medical University, Dalian, China (X.S.).
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Billaud M, Chiu YH, Lohman AW, Parpaite T, Butcher JT, Mutchler SM, DeLalio LJ, Artamonov MV, Sandilos JK, Best AK, Somlyo AV, Thompson RJ, Le TH, Ravichandran KS, Bayliss DA, Isakson BE. A molecular signature in the pannexin1 intracellular loop confers channel activation by the α1 adrenoreceptor in smooth muscle cells. Sci Signal 2015; 8:ra17. [PMID: 25690012 DOI: 10.1126/scisignal.2005824] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Both purinergic signaling through nucleotides such as ATP (adenosine 5'-triphosphate) and noradrenergic signaling through molecules such as norepinephrine regulate vascular tone and blood pressure. Pannexin1 (Panx1), which forms large-pore, ATP-releasing channels, is present in vascular smooth muscle cells in peripheral blood vessels and participates in noradrenergic responses. Using pharmacological approaches and mice conditionally lacking Panx1 in smooth muscle cells, we found that Panx1 contributed to vasoconstriction mediated by the α1 adrenoreceptor (α1AR), whereas vasoconstriction in response to serotonin or endothelin-1 was independent of Panx1. Analysis of the Panx1-deficient mice showed that Panx1 contributed to blood pressure regulation especially during the night cycle when sympathetic nervous activity is highest. Using mimetic peptides and site-directed mutagenesis, we identified a specific amino acid sequence in the Panx1 intracellular loop that is essential for activation by α1AR signaling. Collectively, these data describe a specific link between noradrenergic and purinergic signaling in blood pressure homeostasis.
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Affiliation(s)
- Marie Billaud
- 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
| | - Yu-Hsin Chiu
- Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Alexander W Lohman
- 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
| | - Thibaud Parpaite
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Joshua T Butcher
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Stephanie M Mutchler
- 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. Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Mykhaylo V Artamonov
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Joanna K Sandilos
- Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Angela K Best
- Robert M. Berne Cardiovascular Research Center, 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 Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Roger J Thompson
- Department of Cell Biology and Anatomy, Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta T2N 4N1, Canada
| | - Thu H Le
- Department of Medicine, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Kodi S Ravichandran
- Center for Cell Clearance, University of Virginia, Charlottesville, VA 22908, USA. Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, VA 22908, USA. Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, VA 22908, USA
| | - Douglas A Bayliss
- Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, VA 22908, 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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13
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Straub AC, Butcher JT, Billaud M, Mutchler SM, Artamonov MV, Nguyen AT, Johnson T, Best AK, Miller MP, Palmer LA, Columbus L, Somlyo AV, Le TH, Isakson BE. Hemoglobin α/eNOS coupling at myoendothelial junctions is required for nitric oxide scavenging during vasoconstriction. Arterioscler Thromb Vasc Biol 2014; 34:2594-600. [PMID: 25278292 DOI: 10.1161/atvbaha.114.303974] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Hemoglobin α (Hb α) and endothelial nitric oxide synthase (eNOS) form a macromolecular complex at myoendothelial junctions; the functional role of this interaction remains undefined. To test if coupling of eNOS and Hb α regulates nitric oxide signaling, vascular reactivity, and blood pressure using a mimetic peptide of Hb α to disrupt this interaction. APPROACH AND RESULTS In silico modeling of Hb α and eNOS identified a conserved sequence of interaction. By mutating portions of Hb α, we identified a specific sequence that binds eNOS. A mimetic peptide of the Hb α sequence (Hb α X) was generated to disrupt this complex. Using in vitro binding assays with purified Hb α and eNOS and ex vivo proximity ligation assays on resistance arteries, we have demonstrated that Hb α X significantly decreased interaction between eNOS and Hb α. Fluorescein isothiocyanate labeling of Hb α X revealed localization to holes in the internal elastic lamina (ie, myoendothelial junctions). To test the functional effects of Hb α X, we measured cyclic guanosine monophosphate and vascular reactivity. Our results reveal augmented cyclic guanosine monophosphate production and altered vasoconstriction with Hb α X. To test the in vivo effects of these peptides on blood pressure, normotensive and hypertensive mice were injected with Hb α X, which caused a significant decrease in blood pressure; injection of Hb α X into eNOS(-/-) mice had no effect. CONCLUSIONS These results identify a novel sequence on Hb α that is important for Hb α/eNOS complex formation and is critical for nitric oxide signaling at myoendothelial junctions.
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Affiliation(s)
- Adam C Straub
- From the Department of Pharmacology and Chemical Biology (A.C.S.) and Heart, Lung, Blood and Vascular Medicine Institute (A.C.S., A.T.N., M.P.M.), University of Pittsburgh, PA; Robert M. Berne Cardiovascular Research Center (J.T.B., M.B., S.M.M., T.J., A.K.B., B.E.I.), Department of Molecular Physiology and Biophysics (M.B., M.V.A., A.V.S., B.E.I.), Deparment of Pediatrics (L.A.P.), Department of Chemistry (L.C.), and Department of Medicine (T.H.L.), University of Virginia, Charlottesville
| | - Joshua T Butcher
- From the Department of Pharmacology and Chemical Biology (A.C.S.) and Heart, Lung, Blood and Vascular Medicine Institute (A.C.S., A.T.N., M.P.M.), University of Pittsburgh, PA; Robert M. Berne Cardiovascular Research Center (J.T.B., M.B., S.M.M., T.J., A.K.B., B.E.I.), Department of Molecular Physiology and Biophysics (M.B., M.V.A., A.V.S., B.E.I.), Deparment of Pediatrics (L.A.P.), Department of Chemistry (L.C.), and Department of Medicine (T.H.L.), University of Virginia, Charlottesville
| | - Marie Billaud
- From the Department of Pharmacology and Chemical Biology (A.C.S.) and Heart, Lung, Blood and Vascular Medicine Institute (A.C.S., A.T.N., M.P.M.), University of Pittsburgh, PA; Robert M. Berne Cardiovascular Research Center (J.T.B., M.B., S.M.M., T.J., A.K.B., B.E.I.), Department of Molecular Physiology and Biophysics (M.B., M.V.A., A.V.S., B.E.I.), Deparment of Pediatrics (L.A.P.), Department of Chemistry (L.C.), and Department of Medicine (T.H.L.), University of Virginia, Charlottesville
| | - Stephanie M Mutchler
- From the Department of Pharmacology and Chemical Biology (A.C.S.) and Heart, Lung, Blood and Vascular Medicine Institute (A.C.S., A.T.N., M.P.M.), University of Pittsburgh, PA; Robert M. Berne Cardiovascular Research Center (J.T.B., M.B., S.M.M., T.J., A.K.B., B.E.I.), Department of Molecular Physiology and Biophysics (M.B., M.V.A., A.V.S., B.E.I.), Deparment of Pediatrics (L.A.P.), Department of Chemistry (L.C.), and Department of Medicine (T.H.L.), University of Virginia, Charlottesville
| | - Mykhaylo V Artamonov
- From the Department of Pharmacology and Chemical Biology (A.C.S.) and Heart, Lung, Blood and Vascular Medicine Institute (A.C.S., A.T.N., M.P.M.), University of Pittsburgh, PA; Robert M. Berne Cardiovascular Research Center (J.T.B., M.B., S.M.M., T.J., A.K.B., B.E.I.), Department of Molecular Physiology and Biophysics (M.B., M.V.A., A.V.S., B.E.I.), Deparment of Pediatrics (L.A.P.), Department of Chemistry (L.C.), and Department of Medicine (T.H.L.), University of Virginia, Charlottesville
| | - Anh T Nguyen
- From the Department of Pharmacology and Chemical Biology (A.C.S.) and Heart, Lung, Blood and Vascular Medicine Institute (A.C.S., A.T.N., M.P.M.), University of Pittsburgh, PA; Robert M. Berne Cardiovascular Research Center (J.T.B., M.B., S.M.M., T.J., A.K.B., B.E.I.), Department of Molecular Physiology and Biophysics (M.B., M.V.A., A.V.S., B.E.I.), Deparment of Pediatrics (L.A.P.), Department of Chemistry (L.C.), and Department of Medicine (T.H.L.), University of Virginia, Charlottesville
| | - Tyler Johnson
- From the Department of Pharmacology and Chemical Biology (A.C.S.) and Heart, Lung, Blood and Vascular Medicine Institute (A.C.S., A.T.N., M.P.M.), University of Pittsburgh, PA; Robert M. Berne Cardiovascular Research Center (J.T.B., M.B., S.M.M., T.J., A.K.B., B.E.I.), Department of Molecular Physiology and Biophysics (M.B., M.V.A., A.V.S., B.E.I.), Deparment of Pediatrics (L.A.P.), Department of Chemistry (L.C.), and Department of Medicine (T.H.L.), University of Virginia, Charlottesville
| | - Angela K Best
- From the Department of Pharmacology and Chemical Biology (A.C.S.) and Heart, Lung, Blood and Vascular Medicine Institute (A.C.S., A.T.N., M.P.M.), University of Pittsburgh, PA; Robert M. Berne Cardiovascular Research Center (J.T.B., M.B., S.M.M., T.J., A.K.B., B.E.I.), Department of Molecular Physiology and Biophysics (M.B., M.V.A., A.V.S., B.E.I.), Deparment of Pediatrics (L.A.P.), Department of Chemistry (L.C.), and Department of Medicine (T.H.L.), University of Virginia, Charlottesville
| | - Megan P Miller
- From the Department of Pharmacology and Chemical Biology (A.C.S.) and Heart, Lung, Blood and Vascular Medicine Institute (A.C.S., A.T.N., M.P.M.), University of Pittsburgh, PA; Robert M. Berne Cardiovascular Research Center (J.T.B., M.B., S.M.M., T.J., A.K.B., B.E.I.), Department of Molecular Physiology and Biophysics (M.B., M.V.A., A.V.S., B.E.I.), Deparment of Pediatrics (L.A.P.), Department of Chemistry (L.C.), and Department of Medicine (T.H.L.), University of Virginia, Charlottesville
| | - Lisa A Palmer
- From the Department of Pharmacology and Chemical Biology (A.C.S.) and Heart, Lung, Blood and Vascular Medicine Institute (A.C.S., A.T.N., M.P.M.), University of Pittsburgh, PA; Robert M. Berne Cardiovascular Research Center (J.T.B., M.B., S.M.M., T.J., A.K.B., B.E.I.), Department of Molecular Physiology and Biophysics (M.B., M.V.A., A.V.S., B.E.I.), Deparment of Pediatrics (L.A.P.), Department of Chemistry (L.C.), and Department of Medicine (T.H.L.), University of Virginia, Charlottesville
| | - Linda Columbus
- From the Department of Pharmacology and Chemical Biology (A.C.S.) and Heart, Lung, Blood and Vascular Medicine Institute (A.C.S., A.T.N., M.P.M.), University of Pittsburgh, PA; Robert M. Berne Cardiovascular Research Center (J.T.B., M.B., S.M.M., T.J., A.K.B., B.E.I.), Department of Molecular Physiology and Biophysics (M.B., M.V.A., A.V.S., B.E.I.), Deparment of Pediatrics (L.A.P.), Department of Chemistry (L.C.), and Department of Medicine (T.H.L.), University of Virginia, Charlottesville
| | - Avril V Somlyo
- From the Department of Pharmacology and Chemical Biology (A.C.S.) and Heart, Lung, Blood and Vascular Medicine Institute (A.C.S., A.T.N., M.P.M.), University of Pittsburgh, PA; Robert M. Berne Cardiovascular Research Center (J.T.B., M.B., S.M.M., T.J., A.K.B., B.E.I.), Department of Molecular Physiology and Biophysics (M.B., M.V.A., A.V.S., B.E.I.), Deparment of Pediatrics (L.A.P.), Department of Chemistry (L.C.), and Department of Medicine (T.H.L.), University of Virginia, Charlottesville
| | - Thu H Le
- From the Department of Pharmacology and Chemical Biology (A.C.S.) and Heart, Lung, Blood and Vascular Medicine Institute (A.C.S., A.T.N., M.P.M.), University of Pittsburgh, PA; Robert M. Berne Cardiovascular Research Center (J.T.B., M.B., S.M.M., T.J., A.K.B., B.E.I.), Department of Molecular Physiology and Biophysics (M.B., M.V.A., A.V.S., B.E.I.), Deparment of Pediatrics (L.A.P.), Department of Chemistry (L.C.), and Department of Medicine (T.H.L.), University of Virginia, Charlottesville
| | - Brant E Isakson
- From the Department of Pharmacology and Chemical Biology (A.C.S.) and Heart, Lung, Blood and Vascular Medicine Institute (A.C.S., A.T.N., M.P.M.), University of Pittsburgh, PA; Robert M. Berne Cardiovascular Research Center (J.T.B., M.B., S.M.M., T.J., A.K.B., B.E.I.), Department of Molecular Physiology and Biophysics (M.B., M.V.A., A.V.S., B.E.I.), Deparment of Pediatrics (L.A.P.), Department of Chemistry (L.C.), and Department of Medicine (T.H.L.), University of Virginia, Charlottesville.
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Straub AC, Lohman AW, Billaud M, Johnstone SR, Dwyer ST, Lee MY, Bortz PS, Best AK, Columbus L, Gaston B, Isakson BE. Endothelial cell expression of haemoglobin α regulates nitric oxide signalling. Nature 2012; 491:473-7. [PMID: 23123858 PMCID: PMC3531883 DOI: 10.1038/nature11626] [Citation(s) in RCA: 233] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2012] [Accepted: 09/27/2012] [Indexed: 01/27/2023]
Affiliation(s)
- Adam C Straub
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, Virginia 22908, USA
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Lohman AW, Billaud M, Straub AC, Johnstone SR, Best AK, Lee M, Barr K, Penuela S, Laird DW, Isakson BE. Expression of pannexin isoforms in the systemic murine arterial network. J Vasc Res 2012; 49:405-16. [PMID: 22739252 DOI: 10.1159/000338758] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2011] [Accepted: 04/04/2012] [Indexed: 12/20/2022] Open
Abstract
AIMS Pannexins (Panx) form ATP release channels and it has been proposed that they play an important role in the regulation of vascular tone. However, distribution of Panx across the arterial vasculature is not documented. METHODS We tested antibodies against Panx1, Panx2 and Panx3 on human embryonic kidney cells (which do not endogenously express Panx proteins) transfected with plasmids encoding each Panx isoform and Panx1(-/-) mice. Each of the Panx antibodies was found to be specific and was tested on isolated arteries using immunocytochemistry. RESULTS We demonstrated that Panx1 is the primary isoform detected in the arterial network. In large arteries, Panx1 is primarily in endothelial cells, whereas in small arteries and arterioles it localizes primarily to the smooth muscle cells. Panx1 was the predominant isoform expressed in coronary arteries, except in arteries less than 100 µm where Panx3 became detectable. Only Panx3 was expressed in the juxtaglomerular apparatus and cortical arterioles. The pulmonary artery and alveoli had expression of all 3 Panx isoforms. No Panx isoforms were detected at the myoendothelial junctions. CONCLUSION We conclude that the specific localized expression of Panx channels throughout the vasculature points towards an important role for these channels in regulating the release of ATP throughout the arterial network.
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Affiliation(s)
- Alexander W Lohman
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
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16
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Johnstone SR, Kroncke BM, Straub AC, Best AK, Dunn CA, Mitchell LA, Peskova Y, Nakamoto RK, Koval M, Lo CW, Lampe PD, Columbus L, Isakson BE. MAPK phosphorylation of connexin 43 promotes binding of cyclin E and smooth muscle cell proliferation. Circ Res 2012; 111:201-11. [PMID: 22652908 DOI: 10.1161/circresaha.112.272302] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [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] [Indexed: 12/11/2022]
Abstract
RATIONALE Dedifferentiation of vascular smooth muscle cells (VSMC) leading to a proliferative cell phenotype significantly contributes to the development of atherosclerosis. Mitogen-activated protein kinase (MAPK) phosphorylation of proteins including connexin 43 (Cx43) has been associated with VSMC proliferation in atherosclerosis. OBJECTIVE To investigate whether MAPK phosphorylation of Cx43 is directly involved in VSMC proliferation. METHODS AND RESULTS We show in vivo that MAPK-phosphorylated Cx43 forms complexes with the cell cycle control proteins cyclin E and cyclin-dependent kinase 2 (CDK2) in carotids of apolipoprotein-E receptor null (ApoE(-/-)) mice and in C57Bl/6 mice treated with platelet-derived growth factor-BB (PDGF). We tested the involvement of Cx43 MAPK phosphorylation in vitro using constructs for full-length Cx43 (Cx43) or the Cx43 C-terminus (Cx43(CT)) and produced null phosphorylation Ser>Ala (Cx43(MK4A)/Cx43(CTMK4A)) and phospho-mimetic Ser>Asp (Cx43(MK4D)/Cx43(CTMK4D)) mutations. Coimmunoprecipitation studies in primary VSMC isolated from Cx43 wild-type (Cx43(+/+)) and Cx43 null (Cx43(-/-)) mice and analytic size exclusion studies of purified proteins identify that interactions between cyclin E and Cx43 requires Cx43 MAPK phosphorylation. We further demonstrate that Cx43 MAPK phosphorylation is required for PDGF-mediated VSMC proliferation. Finally, using a novel knock-in mouse containing Cx43-MK4A mutation, we show in vivo that interactions between Cx43 and cyclin E are lost and VSMC proliferation does not occur after treatment of carotids with PDGF and that neointima formation is significantly reduced in carotids after injury. CONCLUSIONS We identify MAPK-phosphorylated Cx43 as a novel interacting partner of cyclin E in VSMC and show that this interaction is critical for VSMC proliferation. This novel interaction may be important in the development of atherosclerotic lesions.
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Affiliation(s)
- Scott R Johnstone
- Robert M. Berne Cardiovascular Research Center, Charlottesville, VA 22908, USA
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17
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Lohman AW, Billaud M, Straub AC, Best AK, Lee M, Barr K, Penuela S, Laird D, Isakson BE. Expression of pannexin isoforms in the murine arterial network. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.676.10] [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)
- Alexander W Lohman
- Molecular Physiology and Biological PhysicsUniversity of VirginiaCharlottesvilleVA
- Robert M. Berne Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | - Marie Billaud
- Robert M. Berne Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | - Adam C Straub
- Robert M. Berne Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | - Angela K Best
- Robert M. Berne Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | - Monica Lee
- Robert M. Berne Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | - Kevin Barr
- Department of Anatomy and Cell BiologyUniversity of Western OntarioLondonONCanada
| | - Silvia Penuela
- Department of Anatomy and Cell BiologyUniversity of Western OntarioLondonONCanada
| | - Dale Laird
- Department of Anatomy and Cell BiologyUniversity of Western OntarioLondonONCanada
| | - Brant E Isakson
- Molecular Physiology and Biological PhysicsUniversity of VirginiaCharlottesvilleVA
- Robert M. Berne Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
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18
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Johnstone SR, Kroncke BM, Straub AC, Best AK, Dunn CA, Koval M, Lampe PD, Columbus L, Isakson BE. MAPK phosphorylation of connexin 43 promotes binding of cyclin E and smooth muscle cell proliferation. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.870.15] [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)
| | - Brett M Kroncke
- Department of ChemistryUniversity of VirginiaCharlottesvilleVA
| | - Adam C Straub
- Cardiovascular Research CentreUniversity of VirginiaCharlottesvilleVA
| | - Angela K Best
- Cardiovascular Research CentreUniversity of VirginiaCharlottesvilleVA
| | | | - Michael Koval
- Dept of Pulmonary, Allergy and Critical Care MedicineUniversity of EmoryAtlantaGA
| | | | - Linda Columbus
- Department of ChemistryUniversity of VirginiaCharlottesvilleVA
| | - Brant E Isakson
- Cardiovascular Research CentreUniversity of VirginiaCharlottesvilleVA
- Department of Molecular Physiology and Biological PhysicsUniversity of VirginiaCharlottesvilleVA
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19
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Heberlein KR, Han J, Straub AC, Best AK, Kaun C, Wojta J, Isakson BE. A novel mRNA binding protein complex promotes localized plasminogen activator inhibitor-1 accumulation at the myoendothelial junction. Arterioscler Thromb Vasc Biol 2012; 32:1271-9. [PMID: 22383705 DOI: 10.1161/atvbaha.112.246371] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
OBJECTIVE Plasminogen activator inhibitor-1 (PAI-1) has previously been shown to be key to the formation of myoendothelial junctions (MEJs) in normal and pathological states (eg, obesity). We therefore sought to identify the mechanism whereby PAI-1 could be selectively accumulated at the MEJ. METHODS AND RESULTS We identified PAI-1 protein enrichment at the MEJ in obese mice and in response to tumor necrosis factor (TNF-α) with a vascular cell coculture. However, PAI-1 mRNA was also found at the MEJ and transfection with a PAI-1-GFP with TNF-α did not demonstrate trafficking of the protein to the MEJ. We therefore hypothesized the PAI-1 mRNA was being locally translated and identified serpine binding protein-1, which stabilizes PAI-1 mRNA, as being enriched in obese mice and after treatment with TNF-α, whereas Staufen, which degrades PAI-1 mRNA, was absent in obese mice and after TNF-α application. We identified nicotinamide phosphoribosyl transferase as a serpine binding protein-1 binding partner with a functional τ-like microtubule binding domain. Application of peptides against the microtubule binding domain significantly decreased the number of MEJs and the amount of PAI-1 at the MEJ. CONCLUSIONS We conclude that PAI-1 can be locally translated at the MEJ as a result of a unique mRNA binding protein complex.
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Affiliation(s)
- Katherine R Heberlein
- Robert M. Berne Cardiovascular Research Center, Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
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20
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Billaud M, Ross JA, Greyson MA, Bruce AC, Seaman SA, Heberlein KR, Han J, Best AK, Peirce SM, Isakson BE. A new method for in vivo visualization of vessel remodeling using a near-infrared dye. Microcirculation 2011; 18:163-71. [PMID: 21418375 DOI: 10.1111/j.1549-8719.2011.00085.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVES Vascular obstructive events can be partially compensated for by remodeling processes that increase vessel diameter and collateral tortuosity. However, methods for visualizing remodeling events in vivo and with temporal comparisons from the same animal remain elusive. METHODS Using a novel infrared conjugated polyethylene glycol dye, we investigated the possibility of intravital vascular imaging of the mouse ear before and after ligation of the primary feeder artery. For comparison, we used two different mouse models known to have impaired vascular remodeling after ligation (i.e., aged and PAI-1(-/-) mice). The results obtained with the infrared dye were confirmed using immunofluorescence labeling of the ear microvasculature with confocal microscopy. RESULTS After ligation, increases in vessel diameter (between 10% and 60%) and tortuosity (approximately 15%) were observed in C57Bl/6 mice using both the infrared dye and the immunofluorescence technique. However, aged C57Bl/6 and PAI-1(-/-) mice did not show vascular remodeling following ligation. CONCLUSIONS Vascular remodeling can be visualized and accurately quantified using a new infrared dye in vivo. This analysis technique could be generally employed for quantitative investigations of changes in vascular remodeling.
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Affiliation(s)
- Marie Billaud
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, Virginia 22908, USA
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21
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Billaud M, Lohman AW, Straub AC, Looft-Wilson R, Johnstone SR, Araj CA, Best AK, Chekeni FB, Ravichandran KS, Penuela S, Laird DW, Isakson BE. Pannexin1 regulates α1-adrenergic receptor- mediated vasoconstriction. Circ Res 2011; 109:80-5. [PMID: 21546608 DOI: 10.1161/circresaha.110.237594] [Citation(s) in RCA: 146] [Impact Index Per Article: 11.2] [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] [Indexed: 11/16/2022]
Abstract
RATIONALE The coordination of vascular smooth muscle cell constriction plays an important role in vascular function, such as regulation of blood pressure; however, the mechanism responsible for vascular smooth muscle cell communication is not clear in the resistance vasculature. Pannexins (Panx) are purine-releasing channels permeable to the vasoconstrictor ATP and thus may play a role in the coordination of vascular smooth muscle cell constriction. OBJECTIVE We investigated the role of pannexins in phenylephrine- and KCl-mediated constriction of resistance arteries. METHODS AND RESULTS Western blot, immunohistochemistry, and immunogold labeling coupled to scanning and transmission electron microscopy revealed the presence of Panx1 but not Panx2 or Panx3 in thoracodorsal resistance arteries. Functionally, the contractile response of pressurized thoracodorsal resistance arteries to phenylephrine was decreased significantly by multiple Panx inhibitors (mefloquine, probenecid, and (10)Panx1), ectonucleotidase (apyrase), and purinergic receptor inhibitors (suramin and reactive blue-2). Electroporation of thoracodorsal resistance arteries with either Panx1-green fluorescent protein or Panx1 small interfering RNA showed enhanced and decreased constriction, respectively, in response to phenylephrine. Lastly, the Panx inhibitors did not alter constriction in response to KCl. This result is consistent with coimmunoprecipitation experiments from thoracodorsal resistance arteries, which suggested an association between Panx1 and α1D-adrenergic receptor. CONCLUSIONS Our data demonstrate for the first time a key role for Panx1 in resistance arteries by contributing to the coordination of vascular smooth muscle cell constriction and possibly to the regulation of blood pressure.
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Affiliation(s)
- Marie Billaud
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
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22
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Straub A, Billaud M, Johnstone SR, Best AK, Looft‐Wilson R, Gaston B, Palmer L, Isakson BE. Compartmentalized redox signaling at the myoendothelial junction regulates heterocellular communication in the vessel wall. FASEB J 2011. [DOI: 10.1096/fasebj.25.1_supplement.1093.14] [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)
| | | | | | | | | | | | | | - Brant E. Isakson
- Molecular Physiology and Biological PhysicsUniversity of VirginiaCharlottesvilleVA
- Cardiovascular Research Center
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23
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Heberlein K, Straub AC, Best AK, Wojta J, Isakson BE. Nicotinamide phosphoribosyl transferase coordinates stabilization of plasminogen activator inhibitor‐1 mRNA at the myoendothelial junction. FASEB J 2011. [DOI: 10.1096/fasebj.25.1_supplement.1022.6] [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)
- Katherine Heberlein
- Molecular Physiology and Biological PhysicsUniversity of VirginiaCharlottesvilleVA
- Cardiovascular Research Center
| | | | | | | | - Brant E Isakson
- Molecular Physiology and Biological PhysicsUniversity of VirginiaCharlottesvilleVA
- Cardiovascular Research Center
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24
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Straub AC, Billaud M, Johnstone SR, Best AK, Yemen S, Dwyer ST, Looft-Wilson R, Lysiak JJ, Gaston B, Palmer L, Isakson BE. Compartmentalized connexin 43 s-nitrosylation/denitrosylation regulates heterocellular communication in the vessel wall. Arterioscler Thromb Vasc Biol 2010; 31:399-407. [PMID: 21071693 DOI: 10.1161/atvbaha.110.215939] [Citation(s) in RCA: 139] [Impact Index Per Article: 9.9] [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] [Indexed: 01/23/2023]
Abstract
OBJECTIVE To determine whether S-nitrosylation of connexins (Cxs) modulates gap junction communication between endothelium and smooth muscle. METHODS AND RESULTS Heterocellular communication is essential for endothelium control of smooth muscle constriction; however, the exact mechanism governing this action remains unknown. Cxs and NO have been implicated in regulating heterocellular communication in the vessel wall. The myoendothelial junction serves as a conduit to facilitate gap junction communication between endothelial cells and vascular smooth muscle cells within the resistance vasculature. By using isolated vessels and a vascular cell coculture, we found that Cx43 is constitutively S-nitrosylated on cysteine 271 because of active endothelial NO synthase compartmentalized at the myoendothelial junction. Conversely, we found that stimulation of smooth muscle cells with the constrictor phenylephrine caused Cx43 to become denitrosylated because of compartmentalized S-nitrosoglutathione reductase, which attenuated channel permeability. We measured S-nitrosoglutathione breakdown and NO(x) concentrations at the myoendothelial junction and found S-nitrosoglutathione reductase activity to precede NO release. CONCLUSIONS This study provides evidence for compartmentalized S-nitrosylation/denitrosylation in the regulation of smooth muscle cell to endothelial cell communication.
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MESH Headings
- Alcohol Dehydrogenase
- Animals
- Cell Communication/physiology
- Cells, Cultured
- Connexin 43/metabolism
- Endothelium, Vascular/cytology
- Endothelium, Vascular/drug effects
- Endothelium, Vascular/metabolism
- Gap Junctions/metabolism
- Glutathione Reductase/genetics
- Glutathione Reductase/metabolism
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Models, Animal
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Nitric Oxide/metabolism
- Nitric Oxide Synthase Type III/metabolism
- Phenylephrine/pharmacology
- S-Nitrosoglutathione/metabolism
- Vascular Resistance/physiology
- Vasoconstriction/drug effects
- Vasoconstriction/physiology
- Vasoconstrictor Agents/pharmacology
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Affiliation(s)
- Adam C Straub
- Department of Molecular Physiology and Biological Physics, Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
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25
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Johnstone SR, Best AK, Wright CS, Isakson BE, Errington RJ, Martin PE. Enhanced connexin 43 expression delays intra-mitotic duration and cell cycle traverse independently of gap junction channel function. J Cell Biochem 2010; 110:772-82. [PMID: 20512937 DOI: 10.1002/jcb.22590] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Connexins (Cxs) and gap junction (GJ)-mediated communication have been linked with the regulation of cell cycle traverse. However, it is not clear whether Cx expression or GJ channel function are the key mediators in this process or at what stage this regulation may occur. We therefore tested the hypothesis that enhanced Cx expression could alter the rate of cell cycle traverse independently of GJ channel function. Sodium butyrate (NaBu) or anti-arrhythmic peptide (AAP10) were used to enhance Cx expression in HeLa cells stably expressing Cx43 (HeLa-43) and primary cultures of human fibroblasts (HFF) that predominantly express Cx43. To reduce GJ-mediated communication, 18-alpha-glycyrrhetinic acid (GA) was used. In HeLa-43 and HFF cells, NaBu and AAP10 enhanced Cx43 expression and increased channel function, while GA reduced GJ-mediated communication but did not significantly alter Cx43 expression levels. Timelapse microscopy and flow cytometry of HeLa-WT (wild-type, Cx deficient) and HeLa-43 cells dissected cell cycle traverse and enabled measurements of intra-mitotic time and determined levels of G1 arrest. Enhanced Cx43 expression increased mitotic durations corresponding with a G1 delay in cell cycle, which was linked to an increase in expression of the cell cycle inhibitor p21(waf1/cip1) in both HeLa-43 and HFF cells. Reductions in Cx43 channel function did not abrogate these responses, indicating that GJ channel function was not a critical factor in reducing cell proliferation in either cell type. We conclude that enhanced Cx43 expression and not GJ-mediated communication, is involved in regulating cell cycle traverse.
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Affiliation(s)
- Scott R Johnstone
- Department of Biological and Biomedical Sciences, School of Life Sciences, Glasgow Caledonian University, 70 Cowcaddens Rd, Glasgow, Scotland G4 0BA, UK
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26
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Straub AC, Johnstone SR, Best AK, Palmer L, Isakson BE. Compartmentalized nitric oxide signaling at the myoendothelial junction can regulate gap junction communication. FASEB J 2010. [DOI: 10.1096/fasebj.24.1_supplement.591.4] [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)
| | | | | | - Lisa Palmer
- Department of PediatricsUniversity of VirginiaCharlottesvilleVA
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27
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Heberlein K, Han J, Zorn G, Kaun C, Straub AC, Best AK, Sharma P, Wojta J, Isakson BE. The potential for localized translation and induction of plasminogen activator inhibitor‐1 at the myoendothelial junction in response to TNF‐alpha. FASEB J 2010. [DOI: 10.1096/fasebj.24.1_supplement.777.10] [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)
| | - Jenny Han
- University of VirginiaCharlottesvilleVA
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28
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Heberlein KR, Straub AC, Best AK, Greyson MA, Looft-Wilson RC, Sharma PR, Meher A, Leitinger N, Isakson BE. Plasminogen activator inhibitor-1 regulates myoendothelial junction formation. Circ Res 2010; 106:1092-102. [PMID: 20133900 DOI: 10.1161/circresaha.109.215723] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [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] [Indexed: 11/16/2022]
Abstract
RATIONALE Plasminogen activator inhibitor-1 (PAI-1) is a biomarker for several vascular disease states; however, its target of action within the vessel wall is undefined. OBJECTIVE Determine the ability of PAI-1 to regulate myoendothelial junction (MEJ) formation. METHODS AND RESULTS MEJs are found throughout the vasculature linking endothelial cells (ECs) and vascular smooth muscle cells. Using a vascular cell coculture we isolated MEJ fractions and performed two-dimensional differential gel electrophoresis. Mass spectrometry identified PAI-1 as being enriched within MEJ fractions, which we confirmed in vivo. In the vascular cell coculture, recombinant PAI-1 added to the EC monolayer significantly increased MEJs. Conversely, addition of a PAI-1 monoclonal antibody to the EC monolayer reduced the number of MEJs. This was also observed in vivo where mice fed a high fat diet had increased PAI-1 and MEJs and the number of MEJs in coronary arterioles of PAI-1(-/-) mice was significantly reduced when compared to C57Bl/6 mice. The presence of MEJs in PAI-1(-/-) coronary arterioles was restored when their hearts were transplanted into and exposed to the circulation of C57Bl/6 mice. Application of biotin-conjugated PAI-1 to the EC monolayer in vitro confirmed the ability of luminal PAI-1 to translocate to the MEJ. Functionally, phenylephrine-induced heterocellular calcium communication in the vascular cell coculture was temporally enhanced when recombinant PAI-1 was present, and prolonged when PAI-1 was absent. CONCLUSION Our data implicate circulating PAI-1 as a key regulator of MEJ formation and a potential target for pharmacological intervention in diseases with vascular abnormalities (eg, diabetes mellitus).
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Affiliation(s)
- Katherine R Heberlein
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA.
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29
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Straub AC, Johnstone SR, Heberlein KR, Rizzo MJ, Best AK, Boitano S, Isakson BE. Site-specific connexin phosphorylation is associated with reduced heterocellular communication between smooth muscle and endothelium. J Vasc Res 2009; 47:277-86. [PMID: 20016202 DOI: 10.1159/000265562] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2009] [Accepted: 07/08/2009] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIMS Myoendothelial junctions (MEJs) represent a specialized signaling domain between vascular smooth muscle cells (VSMC) and endothelial cells (EC). The functional consequences of phosphorylation state of the connexins (Cx) at the MEJ have not been explored. METHODS/RESULTS Application of adenosine 3',5'-cyclic monophosphate sodium (pCPT) to mouse cremasteric arterioles reduces the detection of connexin 43 (Cx43) phosphorylated at its carboxyl terminal serine 368 site (S368) at the MEJ in vivo. After single-cell microinjection of a VSMC in mouse cremaster arterioles, only in the presence of pCPT was dye transfer to EC observed. We used a vascular cell co-culture (VCCC) and applied the phorbol ester 12-O-tetradecanoylphorbol 13-acetate (PMA) or fibroblast growth factor-2 (FGF-2) to induce phosphorylation of Cx43 S368. This phosphorylation event was associated with a significant reduction in dye transfer and calcium communication. Using a novel method to monitor increases in intracellular calcium across the in vitro MEJ, we noted that PMA and FGF-2 both inhibited movement of inositol 1,4,5-triphosphate (IP(3)), but to a lesser extent Ca(2+). CONCLUSION These data indicate that site-specific connexin phosphorylation at the MEJ can potentially regulate the movement of solutes between EC and VSMC in the vessel wall.
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Affiliation(s)
- Adam C Straub
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, VA 22908, USA
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30
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Heberlein K, Straub AC, Best AK, Looft‐Wilson RC, Isakson BE. Plasminogen activator inhibitor‐1 can regulate myoendothelial junction formation. FASEB J 2009. [DOI: 10.1096/fasebj.23.1_supplement.765.2] [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)
- Katherine Heberlein
- Robert M. Berne Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | - Adam C Straub
- Robert M. Berne Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | - Angela K Best
- Robert M. Berne Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | | | - Brant E Isakson
- Robert M. Berne Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
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31
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Heberlein K, Best AK, Isakson BE. Proteomic analysis of the myoendothelial junction. FASEB J 2009. [DOI: 10.1096/fasebj.23.1_supplement.765.1] [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)
- Katherine Heberlein
- Robert M. Berne Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | - Angela K Best
- Robert M. Berne Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
| | - Brant E Isakson
- Robert M. Berne Cardiovascular Research CenterUniversity of VirginiaCharlottesvilleVA
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32
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Isakson BE, Best AK, Duling BR. Incidence of protein on actin bridges between endothelium and smooth muscle in arterioles demonstrates heterogeneous connexin expression and phosphorylation. Am J Physiol Heart Circ Physiol 2008; 294:H2898-904. [PMID: 18408134 DOI: 10.1152/ajpheart.91488.2007] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [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] [Indexed: 11/22/2022]
Abstract
Although much physiology in resistance vessels has been attributed to the cytoplasmic connection between endothelial cells (ECs) and vascular smooth muscle cells (VSMCs), little is known of the protein expression between the two cell types. In an attempt to identify the proteins between ECs and VSMCs, mouse cremaster arterioles were stained with phalloidin-Alexa 594 and viewed on a confocal microscope that resolved "actin bridges" within the internal elastic lamina between ECs and VSMCs. To determine the incidence of protein, the pixel intensity from the antibodies on actin bridges were compared with the pixel intensity from antibodies within ECs or VSMCs. N-cadherin, desmin, connexin (Cx)40, and Cx43 and phosphorylated Cx43 at serine-368 were identified on actin bridges, but NG2, CD31, and Cx45 were not evident. Cx37 expression was more variable than the other connexins examined. Using this method on rat mesentery, we confirm the previously published predominance of Cx37 and Cx40 at the myoendothelial junction that was determined using electron microscopy. We conclude that this new method represents an important screening mechanism in which to rapidly test for protein expression between ECs and VSMCs and possibly a first-step in quantifying protein expression at the myoendothelial junction.
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Affiliation(s)
- Brant E Isakson
- Department of Molecular Physiology and Biological Physics, University of Virginia Health Science System, Charlottesville, Virginia, USA
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Dagum AB, Best AK, Schemitsch EH, Mahoney JL, Mahomed MN, Blight KR. Salvage after severe lower-extremity trauma: are the outcomes worth the means? Plast Reconstr Surg 1999; 103:1212-20. [PMID: 10088509 DOI: 10.1097/00006534-199904040-00017] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Advances in reconstructive surgery have allowed for impressive salvage after severe lower-extremity trauma but not without complications when compared with immediate below-knee amputation. Several amputation index scores have been developed to help predict successful salvage as defined by a viable rather than a functional extremity. The purpose of this study was to evaluate retrospectively the predictive value of the amputation index scores and to assess prospectively overall health status and specific dysfunction in successful limb salvage and primary and secondary amputation by administering standardized generic and specific outcomes questionnaires (Medical Outcomes Study 36-Item Short-Form Health Survey, Western Ontario and MacMaster Universities Osteoarthritis Index). A retrospective chart review identified 55 severe lower-extremity injuries (Gustilo Type IIIB and IIIC) over a 12-year period (1984 to 1996). Forty-six severe open tibial fractures in 45 patients underwent attempted salvage. All required soft-tissue coverage by either local or free flap or vascular repair for leg salvage. The attempted-salvage group was subdivided into successful salvage and secondary amputation. The other nine patients underwent a primary amputation. There were no statistically significant differences in terms of patient demographics or other injuries (Injury Severity Score) in the three groups. Forty-eight of 54 patients with an average 5-year follow-up completed a validated generic and specific outcomes health questionnaire. In the attempted-salvage group, 89 percent of patients had a successful salvage and 11 percent came to a secondary amputation. The amputation index scores correctly predicted an amputation in 32 percent of patients. The magnitude of the amputation index scores did not correlate with the physical outcomes scores and were not found to add any significant value of information to the surgeon's decision making. Patients undergoing primary and secondary amputation had a worse physical outcomes score (28 versus 38) than successful salvage (p < 0.007). Even so, the SF-36 (physical component score) outcomes score for this group of injured extremities, regardless as to whether salvaged or amputated, was as low as or lower than that of many serious medical illnesses, suggesting that severe lower-extremity trauma impairs health as much as or more than being seriously ill. The mental component score in this group was comparable to that of a healthy population (49 versus 50), which implies the disability is primarily physical rather than psychological. Ninety-two percent of patients preferred their salvaged leg to an amputation at any stage of their injury, and none would have preferred a primary amputation.
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Affiliation(s)
- A B Dagum
- Department of Surgery, University of Toronto at the Oshawa General Hospital, Ontario, Canada
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