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Garcia V, Gilani A, Shkolnik B, Pandey V, Zhang FF, Dakarapu R, Gandham SK, Reddy NR, Graves JP, Gruzdev A, Zeldin DC, Capdevila JH, Falck JR, Schwartzman ML. 20-HETE Signals Through G-Protein-Coupled Receptor GPR75 (G q) to Affect Vascular Function and Trigger Hypertension. Circ Res 2017; 120:1776-1788. [PMID: 28325781 DOI: 10.1161/circresaha.116.310525] [Citation(s) in RCA: 107] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 03/03/2017] [Accepted: 03/20/2017] [Indexed: 12/31/2022]
Abstract
RATIONALE 20-Hydroxyeicosatetraenoic acid (20-HETE), one of the principle cytochrome P450 eicosanoids, is a potent vasoactive lipid whose vascular effects include stimulation of smooth muscle contractility, migration, and proliferation, as well as endothelial cell dysfunction and inflammation. Increased levels of 20-HETE in experimental animals and in humans are associated with hypertension, stroke, myocardial infarction, and vascular diseases. OBJECTIVE To date, a receptor/binding site for 20-HETE has been implicated based on the use of specific agonists and antagonists. The present study was undertaken to identify a receptor to which 20-HETE binds and through which it activates a signaling cascade that culminates in many of the functional outcomes attributed to 20-HETE in vitro and in vivo. METHODS AND RESULTS Using crosslinking analogs, click chemistry, binding assays, and functional assays, we identified G-protein receptor 75 (GPR75), currently an orphan G-protein-coupled receptor (GPCR), as a specific target of 20-HETE. In cultured human endothelial cells, 20-HETE binding to GPR75 stimulated Gαq/11 protein dissociation and increased inositol phosphate accumulation and GPCR-kinase interacting protein-1-GPR75 binding, which further facilitated the c-Src-mediated transactivation of epidermal growth factor receptor. This results in downstream signaling pathways that induce angiotensin-converting enzyme expression and endothelial dysfunction. Knockdown of GPR75 or GPCR-kinase interacting protein-1 prevented 20-HETE-mediated endothelial growth factor receptor phosphorylation and angiotensin-converting enzyme induction. In vascular smooth muscle cells, GPR75-20-HETE pairing is associated with Gαq/11- and GPCR-kinase interacting protein-1-mediated protein kinase C-stimulated phosphorylation of MaxiKβ, linking GPR75 activation to 20-HETE-mediated vasoconstriction. GPR75 knockdown in a mouse model of 20-HETE-dependent hypertension prevented blood pressure elevation and 20-HETE-mediated increases in angiotensin-converting enzyme expression, endothelial dysfunction, smooth muscle contractility, and vascular remodeling. CONCLUSIONS This is the first report to identify a GPCR target for an eicosanoid of this class. The discovery of 20-HETE-GPR75 pairing presented here provides the molecular basis for the signaling and pathophysiological functions mediated by 20-HETE in hypertension and cardiovascular diseases.
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Affiliation(s)
- Victor Garcia
- From the Department of Pharmacology, New York Medical College School of Medicine, Valhalla (V.G., A.G., B.S., V.P., F.F.Z., M.L.S.); Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas (R.D., S.K.G., N.R.R., J.R.F.); Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC (J.P.G., A.G., D.C.Z.); and Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (J.H.C.)
| | - Ankit Gilani
- From the Department of Pharmacology, New York Medical College School of Medicine, Valhalla (V.G., A.G., B.S., V.P., F.F.Z., M.L.S.); Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas (R.D., S.K.G., N.R.R., J.R.F.); Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC (J.P.G., A.G., D.C.Z.); and Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (J.H.C.)
| | - Brian Shkolnik
- From the Department of Pharmacology, New York Medical College School of Medicine, Valhalla (V.G., A.G., B.S., V.P., F.F.Z., M.L.S.); Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas (R.D., S.K.G., N.R.R., J.R.F.); Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC (J.P.G., A.G., D.C.Z.); and Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (J.H.C.)
| | - Varunkumar Pandey
- From the Department of Pharmacology, New York Medical College School of Medicine, Valhalla (V.G., A.G., B.S., V.P., F.F.Z., M.L.S.); Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas (R.D., S.K.G., N.R.R., J.R.F.); Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC (J.P.G., A.G., D.C.Z.); and Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (J.H.C.)
| | - Frank Fan Zhang
- From the Department of Pharmacology, New York Medical College School of Medicine, Valhalla (V.G., A.G., B.S., V.P., F.F.Z., M.L.S.); Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas (R.D., S.K.G., N.R.R., J.R.F.); Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC (J.P.G., A.G., D.C.Z.); and Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (J.H.C.)
| | - Rambabu Dakarapu
- From the Department of Pharmacology, New York Medical College School of Medicine, Valhalla (V.G., A.G., B.S., V.P., F.F.Z., M.L.S.); Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas (R.D., S.K.G., N.R.R., J.R.F.); Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC (J.P.G., A.G., D.C.Z.); and Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (J.H.C.)
| | - Shyam K Gandham
- From the Department of Pharmacology, New York Medical College School of Medicine, Valhalla (V.G., A.G., B.S., V.P., F.F.Z., M.L.S.); Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas (R.D., S.K.G., N.R.R., J.R.F.); Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC (J.P.G., A.G., D.C.Z.); and Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (J.H.C.)
| | - N Rami Reddy
- From the Department of Pharmacology, New York Medical College School of Medicine, Valhalla (V.G., A.G., B.S., V.P., F.F.Z., M.L.S.); Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas (R.D., S.K.G., N.R.R., J.R.F.); Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC (J.P.G., A.G., D.C.Z.); and Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (J.H.C.)
| | - Joan P Graves
- From the Department of Pharmacology, New York Medical College School of Medicine, Valhalla (V.G., A.G., B.S., V.P., F.F.Z., M.L.S.); Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas (R.D., S.K.G., N.R.R., J.R.F.); Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC (J.P.G., A.G., D.C.Z.); and Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (J.H.C.)
| | - Artiom Gruzdev
- From the Department of Pharmacology, New York Medical College School of Medicine, Valhalla (V.G., A.G., B.S., V.P., F.F.Z., M.L.S.); Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas (R.D., S.K.G., N.R.R., J.R.F.); Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC (J.P.G., A.G., D.C.Z.); and Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (J.H.C.)
| | - Darryl C Zeldin
- From the Department of Pharmacology, New York Medical College School of Medicine, Valhalla (V.G., A.G., B.S., V.P., F.F.Z., M.L.S.); Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas (R.D., S.K.G., N.R.R., J.R.F.); Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC (J.P.G., A.G., D.C.Z.); and Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (J.H.C.)
| | - Jorge H Capdevila
- From the Department of Pharmacology, New York Medical College School of Medicine, Valhalla (V.G., A.G., B.S., V.P., F.F.Z., M.L.S.); Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas (R.D., S.K.G., N.R.R., J.R.F.); Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC (J.P.G., A.G., D.C.Z.); and Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (J.H.C.)
| | - John R Falck
- From the Department of Pharmacology, New York Medical College School of Medicine, Valhalla (V.G., A.G., B.S., V.P., F.F.Z., M.L.S.); Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas (R.D., S.K.G., N.R.R., J.R.F.); Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC (J.P.G., A.G., D.C.Z.); and Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (J.H.C.)
| | - Michal Laniado Schwartzman
- From the Department of Pharmacology, New York Medical College School of Medicine, Valhalla (V.G., A.G., B.S., V.P., F.F.Z., M.L.S.); Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas (R.D., S.K.G., N.R.R., J.R.F.); Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC (J.P.G., A.G., D.C.Z.); and Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (J.H.C.).
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