1
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Gebauer PH, Turzo M, Lasitschka F, Weigand MA, Busch CJ. Inhibition of ornithine decarboxylase restores hypoxic pulmonary vasoconstriction in endotoxemic mice. Pulm Circ 2020; 10:2045894020915831. [PMID: 33403098 PMCID: PMC7745575 DOI: 10.1177/2045894020915831] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 03/06/2020] [Indexed: 11/29/2022] Open
Abstract
Endotoxemia impairs hypoxic pulmonary vasoconstriction which leads to systemic hypoxemia. This derogation is attributable to increased activity of nitric oxide synthase 2 and arginase metabolism. Gene expression analysis has shown increased expression of ornithine decarboxylase in lungs of endotoxemic mice, a downstream enzyme of arginase metabolism. The aim of this study was to investigate whether inhibition of ornithine decarboxylase increases hypoxic pulmonary vasoconstriction in lungs of endotoxemic mice. Mice received lipopolysaccharides or saline intraperitoneal, and hypoxic pulmonary vasoconstriction was measured using an isolated perfused mouse lung model. Additional mice with and without endotoxemia were pretreated with the ornithine decarboxylase-inhibitor difluoromethylornithine before examination of hypoxic pulmonary vasoconstriction. Hypoxic pulmonary vasoconstriction was defined as the difference of pulmonary arterial pressure between normoxic and hypoxic ventilation. In addition, lung tissue was analyzed using real-time quantitative polymerase chain reaction, Western blot and immunohistochemistry. Lipopolysaccharides caused an up-regulation of ornithine decarboxylase mRNA level (2.73 ± 0.19-fold increase, p < 0.05) as well as ornithine decarboxylase protein level (4.05 ± 0.37-fold increase, p < 0.05). Endotoxemia attenuated hypoxic pulmonary vasoconstriction when compared with untreated control mice (26.3 ± 9.7% vs. 67.0 ± 17.5%). Difluoromethylornithine (20, 100, 500 mg kg−1 body weight intraperitoneal) restored hypoxic pulmonary vasoconstriction in lungs of endotoxemic mice in a dose-dependent way (25.8 ± 9.9%, 57.3 ± 17.2%, 62.3 ± 12.4%) and decreased hypoxic pulmonary vasoconstriction in control mice (53.6 ± 13.6%, 40.0 ± 14.9%, 35.9 ± 12.4%). These results show that endotoxemia induces ornithine decarboxylase expression and suggest that ornithine decarboxylase contributes to the endotoxemia-induced impairment of hypoxic pulmonary vasoconstriction. Inhibition of ornithine decarboxylase might be a target in the therapy of diseases with inflammation impaired hypoxic pulmonary vasoconstriction, like the sepsis-associated acute respiratory distress syndrome (ARDS).
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Affiliation(s)
- P H Gebauer
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
| | - M Turzo
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
| | - F Lasitschka
- Institute of Pathology, Heidelberg University Hospital, Heidelberg, Germany
| | - M A Weigand
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
| | - C J Busch
- Department of Anesthesiology, Heidelberg University Hospital, Heidelberg, Germany
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2
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Kandhi S, Alruwaili N, Wolin MS, Sun D, Huang A. Reciprocal actions of constrictor prostanoids and superoxide in chronic hypoxia-induced pulmonary hypertension: roles of EETs. Pulm Circ 2019; 9:2045894019895947. [PMID: 31908769 DOI: 10.1177/2045894019895947] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 11/25/2019] [Indexed: 12/11/2022] Open
Abstract
Epoxyeicosatrienoic acids (EETs) are synthesized from arachidonic acid by CYP/epoxygenase and metabolized by soluble epoxide hydrolase (sEH). Roles of EETs in hypoxia-induced pulmonary hypertension (HPH) remain elusive. The present study aimed to investigate the underlying mechanisms, by which EETs potentiate HPH. Experiments were conducted on sEH knockout (sEH-KO) and wild type (WT) mice after exposure to hypoxia (10% oxygen) for three weeks. In normal/normoxic conditions, WT and sEH-KO mice exhibited comparable pulmonary artery acceleration time (PAAT), ejection time (ET), PAAT/ET ratio, and velocity time integral (VTI), along with similar right ventricular systolic pressure (RVSP). Chronic hypoxia significantly reduced PAAT, ET, and VTI, coincided with an increase in RVSP; these impairments were more severe in sEH-KO than WT mice. Hypoxia elicited downregulation of sEH and upregulation of CYP2C9 accompanied with elevation of CYP-sourced superoxide, leading to enhanced pulmonary EETs in hypoxic mice with significantly higher levels in sEH-KO mice. Isometric tension of isolated pulmonary arteries was recorded. In addition to downregulation of eNOS-induced impairment of vasorelaxation to ACh, HPH mice displayed upregulation of thromboxane A2 (TXA2) receptor, paralleled with enhanced pulmonary vasocontraction to a TXA2 analog (U46619) in an sEH-KO predominant manner. Inhibition of COX-1 or COX-2 significantly prevented the enhancement by ∼50% in both groups of vessels, and the remaining incremental components were eliminated by scavenging of superoxide with Tiron. In conclusion, hypoxia-driven increases in EETs, intensified COXs/TXA2 signaling, great superoxide sourced from activated CYP2C9, and impaired NO bioavailability work in concert, to potentiate HPH development.
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Affiliation(s)
- Sharath Kandhi
- Departments of Physiology, New York Medical College, Valhalla, NY, USA
| | - Norah Alruwaili
- Departments of Physiology, New York Medical College, Valhalla, NY, USA
| | - Michael S Wolin
- Departments of Physiology, New York Medical College, Valhalla, NY, USA
| | - Dong Sun
- Departments of Physiology, New York Medical College, Valhalla, NY, USA
| | - An Huang
- Departments of Physiology, New York Medical College, Valhalla, NY, USA
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3
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Schleifer G, Marutani E, Ferrari M, Sharma R, Skinner O, Goldberger O, Grange RMH, Peneyra K, Malhotra R, Wepler M, Ichinose F, Bloch DB, Mootha VK, Zapol WM. Impaired hypoxic pulmonary vasoconstriction in a mouse model of Leigh syndrome. Am J Physiol Lung Cell Mol Physiol 2018; 316:L391-L399. [PMID: 30520688 PMCID: PMC6397345 DOI: 10.1152/ajplung.00419.2018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Hypoxic pulmonary vasoconstriction (HPV) is a physiological vasomotor response that maintains systemic oxygenation by matching perfusion to ventilation during alveolar hypoxia. Although mitochondria appear to play an essential role in HPV, the impact of mitochondrial dysfunction on HPV remains incompletely defined. Mice lacking the mitochondrial complex I (CI) subunit Ndufs4 ( Ndufs4-/-) develop a fatal progressive encephalopathy and serve as a model for Leigh syndrome, the most common mitochondrial disease in children. Breathing normobaric 11% O2 prevents neurological disease and improves survival in Ndufs4-/- mice. In this study, we found that either genetic Ndufs4 deficiency or pharmacological inhibition of CI using piericidin A impaired the ability of left mainstem bronchus occlusion (LMBO) to induce HPV. In mice breathing air, the partial pressure of arterial oxygen during LMBO was lower in Ndufs4-/- and in piericidin A-treated Ndufs4+/+ mice than in respective controls. Impairment of HPV in Ndufs4-/- mice was not a result of nonspecific dysfunction of the pulmonary vascular contractile apparatus or pulmonary inflammation. In Ndufs4-deficient mice, 3 wk of breathing 11% O2 restored HPV in response to LMBO. When compared with Ndufs4-/- mice breathing air, chronic hypoxia improved systemic oxygenation during LMBO. The results of this study show that, when breathing air, mice with a congenital Ndufs4 deficiency or chemically inhibited CI function have impaired HPV. Our study raises the possibility that patients with inborn errors of mitochondrial function may also have defects in HPV.
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Affiliation(s)
- Grigorij Schleifer
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts
| | - Eizo Marutani
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts
| | - Michele Ferrari
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts
| | - Rohit Sharma
- Howard Hughes Medical Institute and Department of Molecular Biology, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts
| | - Owen Skinner
- Howard Hughes Medical Institute and Department of Molecular Biology, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts
| | - Olga Goldberger
- Howard Hughes Medical Institute and Department of Molecular Biology, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts
| | - Robert Matthew Henry Grange
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts
| | - Kathryn Peneyra
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts
| | - Rajeev Malhotra
- Cardiology Division and Cardiovascular Research Center, Department of Medicine, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts
| | - Martin Wepler
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts.,Institut für Anästhesiologische Pathophysiologie und Verfahrensentwicklung , Ulm , Germany
| | - Fumito Ichinose
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts
| | - Donald B Bloch
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts.,Division of Rheumatology, Allergy and Immunology, Department of Medicine, Harvard Medical School and Massachusetts General Hospital , Boston, Massachusetts
| | - Vamsi K Mootha
- Howard Hughes Medical Institute and Department of Molecular Biology, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts
| | - Warren M Zapol
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts
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4
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Turzo M, Vaith J, Lasitschka F, Weigand MA, Busch CJ. Role of ATP-sensitive potassium channels on hypoxic pulmonary vasoconstriction in endotoxemia. Respir Res 2018; 19:29. [PMID: 29433570 PMCID: PMC5810061 DOI: 10.1186/s12931-018-0735-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 02/05/2018] [Indexed: 02/12/2023] Open
Abstract
BACKGROUND ATP-regulated potassium channels (KATP) regulate pulmonary vascular tone and are involved in hypoxic pulmonary vasoconstriction (HPV). In patients with inflammation like sepsis or ARDS, HPV is impaired, resulting in a ventilation-perfusion mismatch and hypoxia. Since increase of vascular KATP channel Kir6.1 has been reported in animal models of endotoxemia, we studied the expression and physiological effects of Kir6.1 in murine endotoxemic lungs. We hypothesized that inhibition of overexpressed Kir6.1 increases HPV in endotoxemia. METHODS Mice (C57BL/6; n = 55) with (n = 27) and without (n = 28) endotoxemia (35 mg/kg LPS i.p. for 18 h) were analyzed for Kir6.1 gene as well as protein expression and HPV was examined in isolated perfused mouse lungs with and without selective inhibition of Kir6.1 with PNU-37883A. Pulmonary artery pressure (PAP) and pressure-flow curves during normoxic (FiO2 0.21) and hypoxic (FiO2 0.01) ventilation were obtained. HPV was quantified as the increase in perfusion pressure in response to hypoxic ventilation in mmHg of baseline perfusion pressure (ΔPAP) in the presence and absence of PNU-37883A. RESULTS Endotoxemia increases pulmonary Kir6.1 gene (+ 2.8 ± 0.3-fold) and protein expression (+ 2.1 ± 0.3-fold). Hypoxia increases HPV in lungs of control animals, while endotoxemia decreases HPV (∆PAP control: 9.2 ± 0.9 mmHg vs. LPS: 3.0 ± 0.7 mmHg, p < 0.05, means ± SEM). Inhibition of Kir6.1 with 1 μM PNU-37883A increases HPV in endotoxemia, while not increasing HPV in controls (∆PAP PNU control: 9.3 ± 0.7 mmHg vs. PNU LPS 8.3 ± 0.9 mmHg, p < 0.05, means ± SEM). CONCLUSION Endotoxemia increases pulmonary Kir6.1 gene and protein expression. Inhibition of Kir6.1 augments HPV in murine endotoxemic lungs.
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Affiliation(s)
- Maurizio Turzo
- Department of Anesthesiology, Heidelberg University Hospital, Im Neuenheimer Feld 110, 69120, Heidelberg, Germany
| | - Julian Vaith
- Department of Anesthesiology, Heidelberg University Hospital, Im Neuenheimer Feld 110, 69120, Heidelberg, Germany
| | - Felix Lasitschka
- Institute of Pathology, Heidelberg University Hospital, Heidelberg, Germany
| | - Markus A Weigand
- Department of Anesthesiology, Heidelberg University Hospital, Im Neuenheimer Feld 110, 69120, Heidelberg, Germany
| | - Cornelius J Busch
- Department of Anesthesiology, Heidelberg University Hospital, Im Neuenheimer Feld 110, 69120, Heidelberg, Germany.
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5
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Wepler M, Beloiartsev A, Buswell MD, Panigrahy D, Malhotra R, Buys ES, Radermacher P, Ichinose F, Bloch DB, Zapol WM. Soluble epoxide hydrolase deficiency or inhibition enhances murine hypoxic pulmonary vasoconstriction after lipopolysaccharide challenge. Am J Physiol Lung Cell Mol Physiol 2016; 311:L1213-L1221. [PMID: 27815261 DOI: 10.1152/ajplung.00394.2016] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 10/28/2016] [Indexed: 02/08/2023] Open
Abstract
Hypoxic pulmonary vasoconstriction (HPV) is the response of the pulmonary vasculature to low levels of alveolar oxygen. HPV improves systemic arterial oxygenation by matching pulmonary perfusion to ventilation during alveolar hypoxia and is impaired in lung diseases such as the acute respiratory distress syndrome (ARDS) and in experimental models of endotoxemia. Epoxyeicosatrienoic acids (EETs) are pulmonary vasoconstrictors, which are metabolized to less vasoactive dihydroxyeicosatrienoic acids (DHETs) by soluble epoxide hydrolase (sEH). We hypothesized that pharmacological inhibition or a congenital deficiency of sEH in mice would reduce the metabolism of EETs and enhance HPV in mice after challenge with lipopolysaccharide (LPS). HPV was assessed 22 h after intravenous injection of LPS by measuring the percentage increase in the pulmonary vascular resistance of the left lung induced by left mainstem bronchial occlusion (LMBO). After LPS challenge, HPV was impaired in sEH+/+, but not in sEH-/- mice or in sEH+/+ mice treated acutely with a sEH inhibitor. Deficiency or pharmacological inhibition of sEH protected mice from the LPS-induced decrease in systemic arterial oxygen concentration (PaO2 ) during LMBO. In the lungs of sEH-/- mice, the LPS-induced increase in DHETs and cytokines was attenuated. Deficiency or pharmacological inhibition of sEH protects mice from LPS-induced impairment of HPV and improves the PaO2 after LMBO. After LPS challenge, lung EET degradation and cytokine expression were reduced in sEH-/- mice. Inhibition of sEH might prove to be an effective treatment for ventilation-perfusion mismatch in lung diseases such as ARDS.
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Affiliation(s)
- Martin Wepler
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital, Boston, Massachusetts.,Harvard Medical School, Boston, Massachusetts
| | - Arkadi Beloiartsev
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital, Boston, Massachusetts.,Harvard Medical School, Boston, Massachusetts
| | - Mary D Buswell
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital, Boston, Massachusetts.,Harvard Medical School, Boston, Massachusetts
| | - Dipak Panigrahy
- Harvard Medical School, Boston, Massachusetts.,Center for Vascular Biology Research and Department of Pathology, Beth Israel Deaconess Medical Center, Boston, Massachusetts
| | - Rajeev Malhotra
- Harvard Medical School, Boston, Massachusetts.,Cardiology Division and Cardiovascular Research Center, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts
| | - Emmanuel S Buys
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital, Boston, Massachusetts.,Harvard Medical School, Boston, Massachusetts
| | - Peter Radermacher
- Institut für Anästhesiologische Pathophysiologie und Verfahrensentwicklung, Universitätsklinik Ulm, Ulm, Germany
| | - Fumito Ichinose
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital, Boston, Massachusetts.,Harvard Medical School, Boston, Massachusetts
| | - Donald B Bloch
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital, Boston, Massachusetts.,Harvard Medical School, Boston, Massachusetts.,Division of Rheumatology, Allergy and Immunology, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts; and
| | - Warren M Zapol
- Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital, Boston, Massachusetts; .,Harvard Medical School, Boston, Massachusetts
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6
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Zhu L, Maruvada R, Sapirstein A, Peters-Golden M, Kim KS. Cysteinyl leukotrienes as novel host factors facilitating Cryptococcus neoformans penetration into the brain. Cell Microbiol 2016; 19. [PMID: 27573789 DOI: 10.1111/cmi.12661] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 07/27/2016] [Accepted: 08/05/2016] [Indexed: 01/07/2023]
Abstract
Cryptococcus neoformas infection of the central nervous system (CNS) continues to be an important cause of mortality and morbidity, and a major contributing factor is our incomplete knowledge of the pathogenesis of this disease. Here, we provide the first direct evidence that C. neoformans exploits host cysteinyl leukotrienes (LTs), formed via LT biosynthetic pathways involving cytosolic phospholipase A2 α (cPLA2 α) and 5-lipoxygenase (5-LO) and acting via cysteinyl leukotriene type 1 receptor (CysLT1), for penetration of the blood-brain barrier. Gene deletion of cPLA2 α and 5-LO and pharmacological inhibition of cPLA2 α, 5-LO and CysLT1 were effective in preventing C. neoformans penetration of the blood-brain barrier in vitro and in vivo. A CysLT1 antagonist enhanced the efficacy of an anti-fungal agent in therapy of C. neoformans CNS infection in mice. These findings demonstrate that host cysteinyl LTs, dependent on the actions of cPLA2 α and 5-LO, promote C. neoformans penetration of the blood-brain barrier and represent novel targets for elucidating the pathogenesis and therapeutic development of C. neoformans CNS infection.
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Affiliation(s)
- Longkun Zhu
- Department of Pediatrics, Division of Pediatric Infectious Diseases, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Department of Cell Biology and Medical Genetics/Center for Cell and Developmental Biology, School of Basic Medical Sciences Fujian Medical University, Fuzhou, Fujian, China
| | - Ravi Maruvada
- Department of Pediatrics, Division of Pediatric Infectious Diseases, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Adam Sapirstein
- Department of Anesthesiology and Critical Care Medicine, Baltimore, MD, USA
| | - Marc Peters-Golden
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Kwang Sik Kim
- Department of Pediatrics, Division of Pediatric Infectious Diseases, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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7
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Beloiartsev A, da Glória Rodrigues-Machado M, Zhou GL, Tan TC, Zazzeron L, Tainsh RE, Leyton P, Jones RC, Scherrer-Crosbie M, Zapol WM. Pulmonary hypertension after prolonged hypoxic exposure in mice with a congenital deficiency of Cyp2j. Am J Respir Cell Mol Biol 2015; 52:563-70. [PMID: 25233285 DOI: 10.1165/rcmb.2013-0482oc] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Cytochrome P450 epoxygenase-derived epoxyeicosatrienoic acids contribute to the regulation of pulmonary vascular tone and hypoxic pulmonary vasoconstriction. We investigated whether the attenuated acute vasoconstrictor response to hypoxic exposure of Cyp2j(-/-) mice would protect these mice against the pulmonary vascular remodeling and hypertension associated with prolonged exposure to hypoxia. Cyp2j(-/-) and Cyp2j(+/+) male and female mice continuously breathed an inspired oxygen fraction of 0.21 (normoxia) or 0.10 (hypoxia) in a normobaric chamber for 6 weeks. We assessed hemoglobin (Hb) concentrations, right ventricular (RV) systolic pressure (RVSP), and transthoracic echocardiographic parameters (pulmonary acceleration time [PAT] and RV wall thickness). Pulmonary Cyp2c29, Cyp2c38, and sEH mRNA levels were measured in Cyp2j(-/-) and Cyp2j(+/+) male mice. At baseline, Cyp2j(-/-) and Cyp2j(+/+) mice had similar Hb levels and RVSP while breathing air. After 6 weeks of hypoxia, circulating Hb concentrations increased but did not differ between Cyp2j(-/-) and Cyp2j(+/+) mice. Chronic hypoxia increased RVSP in Cyp2j(-/-) and Cyp2j(+/+) mice of either gender. Exposure to chronic hypoxia decreased PAT and increased RV wall thickness in both genotypes and genders to a similar extent. Prolonged exposure to hypoxia produced similar levels of RV hypertrophy in both genotypes of either gender. Pulmonary Cyp2c29, Cyp2c38, and sEH mRNA levels did not differ between Cyp2j(-/-) and Cyp2j(+/+) male mice after breathing at normoxia or hypoxia for 6 weeks. These results suggest that murine Cyp2j deficiency does not attenuate the development of murine pulmonary vascular remodeling and hypertension associated with prolonged exposure to hypoxia in mice of both genders.
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Affiliation(s)
- Arkadi Beloiartsev
- 1 Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care and Pain Medicine
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8
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Lu A, Zuo C, He Y, Chen G, Piao L, Zhang J, Xiao B, Shen Y, Tang J, Kong D, Alberti S, Chen D, Zuo S, Zhang Q, Yan S, Fei X, Yuan F, Zhou B, Duan S, Yu Y, Lazarus M, Su Y, Breyer RM, Funk CD, Yu Y. EP3 receptor deficiency attenuates pulmonary hypertension through suppression of Rho/TGF-β1 signaling. J Clin Invest 2015; 125:1228-42. [PMID: 25664856 DOI: 10.1172/jci77656] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Accepted: 01/05/2015] [Indexed: 01/27/2023] Open
Abstract
Pulmonary arterial hypertension (PAH) is commonly associated with chronic hypoxemia in disorders such as chronic obstructive pulmonary disease (COPD). Prostacyclin analogs are widely used in the management of PAH patients; however, clinical efficacy and long-term tolerability of some prostacyclin analogs may be compromised by concomitant activation of the E-prostanoid 3 (EP3) receptor. Here, we found that EP3 expression is upregulated in pulmonary arterial smooth muscle cells (PASMCs) and human distal pulmonary arteries (PAs) in response to hypoxia. Either pharmacological inhibition of EP3 or Ep3 deletion attenuated both hypoxia and monocrotaline-induced pulmonary hypertension and restrained extracellular matrix accumulation in PAs in rodent models. In a murine PAH model, Ep3 deletion in SMCs, but not endothelial cells, retarded PA medial thickness. Knockdown of EP3α and EP3β, but not EP3γ, isoforms diminished hypoxia-induced TGF-β1 activation. Expression of either EP3α or EP3β in EP3-deficient PASMCs restored TGF-β1 activation in response to hypoxia. EP3α/β activation in PASMCs increased RhoA-dependent membrane type 1 extracellular matrix metalloproteinase (MMP) translocation to the cell surface, subsequently activating pro-MMP-2 and promoting TGF-β1 signaling. Activation or disruption of EP3 did not influence PASMC proliferation. Together, our results indicate that EP3 activation facilitates hypoxia-induced vascular remodeling and pulmonary hypertension in mice and suggest EP3 inhibition as a potential therapeutic strategy for pulmonary hypertension.
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MESH Headings
- Animals
- Cell Hypoxia
- Cells, Cultured
- Extracellular Matrix/metabolism
- Extracellular Matrix Proteins/metabolism
- Hypertension, Pulmonary/metabolism
- Hypertension, Pulmonary/physiopathology
- Male
- Mice, Inbred C57BL
- Mice, Knockout
- Pulmonary Artery/metabolism
- Rats, Sprague-Dawley
- Receptors, Prostaglandin E, EP3 Subtype/antagonists & inhibitors
- Receptors, Prostaglandin E, EP3 Subtype/genetics
- Receptors, Prostaglandin E, EP3 Subtype/metabolism
- Signal Transduction
- Sulfonamides/pharmacology
- Transforming Growth Factor beta1/physiology
- Vascular Remodeling
- rho GTP-Binding Proteins/metabolism
- rhoA GTP-Binding Protein
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9
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Yoo HY, Park SJ, Kim HJ, Kim WK, Kim SJ. Integrative understanding of hypoxic pulmonary vasoconstriction using in vitro models: from ventilated/perfused lung to single arterial myocyte. Integr Med Res 2014; 3:180-188. [PMID: 28664095 PMCID: PMC5481745 DOI: 10.1016/j.imr.2014.08.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 08/27/2014] [Accepted: 08/27/2014] [Indexed: 10/25/2022] Open
Abstract
Contractile response of a pulmonary artery (PA) to hypoxia (hypoxic pulmonary vasoconstriction; HPV) is a unique physiological reaction. HPV is beneficial for the optimal distribution of blood flow to differentially ventilated alveolar regions in the lung, thereby preventing systemic hypoxemia. Numerous in vitro studies have been conducted to elucidate the mechanisms underlying HPV. These studies indicate that PA smooth muscle cells (PASMCs) sense lowers the oxygen partial pressure (PO2) and contract under hypoxia. As for the PO2-sensing molecules, a variety of ion channels in PASMCs had been suggested. Nonetheless, the modulator(s) of the ion channels alone cannot mimic HPV in the experiments using PA segments and/or isolated organs. We compared the hypoxic responses of PASMCs, PAs, lung slices, and total lungs using a variety of methods (e.g., patch-clamp technique, isometric contraction measurement, video analysis of precision-cut lung slices, and PA pressure measurement in ventilated/perfused lungs). In this review, the relevant results are compared to provide a comprehensive understanding of HPV. Integration of the influences from surrounding tissues including blood cells as well as the hypoxic regulation of ion channels in PASMCs are indispensable for insights into HPV and other related clinical conditions.
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Affiliation(s)
- Hae Young Yoo
- Red Cross College of Nursing, Chung-Ang University, Seoul, Korea
| | - Su Jung Park
- Department of Physiology, College of Medicine, Seoul National University, Seoul, Korea.,Department of Biomedical Sciences, College of Medicine, Seoul National University, Seoul, Korea.,Ischemic/Hypoxic Disease Institute, College of Medicine, Seoul National University, Seoul, Korea
| | - Hae Jin Kim
- Department of Physiology, College of Medicine, Seoul National University, Seoul, Korea.,Department of Biomedical Sciences, College of Medicine, Seoul National University, Seoul, Korea.,Ischemic/Hypoxic Disease Institute, College of Medicine, Seoul National University, Seoul, Korea
| | - Woo Kyung Kim
- Department of Internal Medicine and Channelopathy Research Institute (CRC), College of Medicine, Dongguk University, Goyang, Korea
| | - Sung Joon Kim
- Department of Physiology, College of Medicine, Seoul National University, Seoul, Korea.,Department of Biomedical Sciences, College of Medicine, Seoul National University, Seoul, Korea.,Ischemic/Hypoxic Disease Institute, College of Medicine, Seoul National University, Seoul, Korea
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10
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Dong K, Yao N, Pu Y, He X, Zhao Q, Luan Y, Guan W, Rao S, Ma Y. Genomic scan reveals loci under altitude adaptation in Tibetan and Dahe pigs. PLoS One 2014; 9:e110520. [PMID: 25329542 PMCID: PMC4201535 DOI: 10.1371/journal.pone.0110520] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Accepted: 09/16/2014] [Indexed: 01/04/2023] Open
Abstract
High altitude environments are of particular interest in the studies of local adaptation as well as their implications in physiology and clinical medicine in human. Some Chinese pig breeds, such as Tibetan pig (TBP) that is well adapted to the high altitude and Dahe pig (DHP) that dwells at the moderate altitude, provide ideal materials to study local adaptation to altitudes. Yet, it is still short of in-depth analysis and understanding of the genetic adaptation to high altitude in the two pig populations. In this study we conducted a genomic scan for selective sweeps using FST to identify genes showing evidence of local adaptations in TBP and DHP, with Wuzhishan pig (WZSP) as the low-altitude reference. Totally, we identified 12 specific selective genes (CCBE1, F2RL1, AGGF1, ZFPM2, IL2, FGF5, PLA2G4A, ADAMTS9, NRBF2, JMJD1C, VEGFC and ADAM19) for TBP and six (OGG1, FOXM, FLT3, RTEL1, CRELD1 and RHOG) for DHP. In addition, six selective genes (VPS13A, GNA14, GDAP1, PARP8, FGF10 and ADAMTS16) were shared by the two pig breeds. Among these selective genes, three (VEGFC, FGF10 and ADAMTS9) were previously reported to be linked to the local adaptation to high altitudes in pigs, while many others were newly identified by this study. Further bioinformatics analysis demonstrated that majority of these selective signatures have some biological functions relevant to the altitude adaptation, for examples, response to hypoxia, development of blood vessels, DNA repair and several hematological involvements. These results suggest that the local adaptation to high altitude environments is sophisticated, involving numerous genes and multiple biological processes, and the shared selective signatures by the two pig breeds may provide an effective avenue to identify the common adaptive mechanisms to different altitudes.
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Affiliation(s)
- Kunzhe Dong
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Na Yao
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yabin Pu
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xiaohong He
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Qianjun Zhao
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yizhao Luan
- Institute for Medical Systems Biology and Department of Medical Statistics and Epidemiology, Guangdong Medical College, Dongguan, China
| | - Weijun Guan
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Shaoqi Rao
- Institute for Medical Systems Biology and Department of Medical Statistics and Epidemiology, Guangdong Medical College, Dongguan, China
- * E-mail: (YHM); (SQR)
| | - Yuehui Ma
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
- * E-mail: (YHM); (SQR)
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11
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Deletion of the murine cytochrome P450 Cyp2j locus by fused BAC-mediated recombination identifies a role for Cyp2j in the pulmonary vascular response to hypoxia. PLoS Genet 2013; 9:e1003950. [PMID: 24278032 PMCID: PMC3836722 DOI: 10.1371/journal.pgen.1003950] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Accepted: 09/27/2013] [Indexed: 01/10/2023] Open
Abstract
Epoxyeicosatrienoic acids (EETs) confer vasoactive and cardioprotective functions. Genetic analysis of the contributions of these short-lived mediators to pathophysiology has been confounded to date by the allelic expansion in rodents of the portion of the genome syntenic to human CYP2J2, a gene encoding one of the principle cytochrome P450 epoxygenases responsible for the formation of EETs in humans. Mice have eight potentially functional genes that could direct the synthesis of epoxygenases with properties similar to those of CYP2J2. As an initial step towards understanding the role of the murine Cyp2j locus, we have created mice bearing a 626-kb deletion spanning the entire region syntenic to CYP2J2, using a combination of homologous and site-directed recombination strategies. A mouse strain in which the locus deletion was complemented by transgenic delivery of BAC sequences encoding human CYP2J2 was also created. Systemic and pulmonary hemodynamic measurements did not differ in wild-type, null, and complemented mice at baseline. However, hypoxic pulmonary vasoconstriction (HPV) during left mainstem bronchus occlusion was impaired and associated with reduced systemic oxygenation in null mice, but not in null mice bearing the human transgene. Administration of an epoxygenase inhibitor to wild-type mice also impaired HPV. These findings demonstrate that Cyp2j gene products regulate the pulmonary vascular response to hypoxia. In mice and humans, the CYP2J class of cytochrome P450 epoxygenases metabolizes arachidonic acid (AA) to epoxyeicosatrienoic acids (EETs), short-lived mediators with effects on both the pulmonary and systemic vasculature. Genetic dissection of CYP2J function to date has been complicated by allelic expansion in the rodent genome. In this study, the mouse chromosomal locus syntenic to human CYP2J2, containing eight presumed genes and two pseudogenes, was deleted via generation of a recombinant template created by homologous and site-specific recombination steps that joined two precursor bacterial artificial chromosomes (BACs). The Cyp2j null mice were subsequently complemented by transgenic delivery of BAC sequences encoding human CYP2J2. Hypoxic pulmonary vasoconstriction (HPV) and systemic oxygenation during regional alveolar hypoxia were unexpectedly found to be impaired in null mice, but not in null mice bearing the transgenic human allele, suggesting that Cyp2j products contribute to the pulmonary vascular response to hypoxia.
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12
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Yan G, Wang Q, Shi H, Han Y, Ma G, Tang C, Gu Y. Regulation of rat intrapulmonary arterial tone by arachidonic acid and prostaglandin E2 during hypoxia. PLoS One 2013; 8:e73839. [PMID: 24013220 PMCID: PMC3754945 DOI: 10.1371/journal.pone.0073839] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Accepted: 07/30/2013] [Indexed: 12/11/2022] Open
Abstract
AIMS Arachidonic acid (AA) and its metabolites, prostaglandins (PG) are known to be involved in regulation of vascular homeostasis including vascular tone and vessel wall tension, but their potential role in Hypoxic pulmonary vasoconstriction (HPV) remains unclear. In this study, we examined the effects of AA and PGE2 on the hypoxic response in isolated rat intrapulmonary arteries (IPAs). METHODS AND RESULTS We carried out the investigation on IPAs by vessel tension measurement. Isotetrandrine (20 µM) significantly inhibited phase I, phase IIb and phase IIc of hypoxic vasoconstriction. Both indomethacin (100 µM) and NS398 attenuated KPSS-induced vessel contraction and phase I, phase IIb and phase IIc of HPV, implying that COX-2 plays a primary role in the hypoxic response of rat IPAs. PGE2 alone caused a significant vasoconstriction in isolated rat IPAs. This constriction is mediated by EP4. Blockage of EP4 by L-161982 (1 µM) significantly inhibited phase I, phase IIb and phase IIc of hypoxic vasoconstriction. However, AH6809 (3 µM), an antagonist of EP1, EP2, EP3 and DP1 receptors, exerted no effect on KPSS or hypoxia induced vessel contraction. Increase of cellular cAMP by forskolin could significantly reduce KPSS-induced vessel contraction and abolish phase I, phase II b and phase II c of HPV. CONCLUSION Our results demonstrated a vasoconstrictive effect of PGE2 on rat IPAs and this effect is via activation of EP4. Furthermore, our results suggest that intracellular cAMP plays dual roles in regulation of vascular tone, depending on the spatial distribution of cAMP and its coupling with EP receptor and Ca(2+) channels.
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Affiliation(s)
- Gaoliang Yan
- Department of Cardiology, Zhongda Hospital of Southeast University Medical School, Nanjing, China ; Institute of Molecular Medicine, Peking University, Beijing, China
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13
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Ko EA, Wan J, Yamamura A, Zimnicka AM, Yamamura H, Yoo HY, Tang H, Smith KA, Sundivakkam PC, Zeifman A, Ayon RJ, Makino A, Yuan JXJ. Functional characterization of voltage-dependent Ca(2+) channels in mouse pulmonary arterial smooth muscle cells: divergent effect of ROS. Am J Physiol Cell Physiol 2013; 304:C1042-52. [PMID: 23426966 DOI: 10.1152/ajpcell.00304.2012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Electromechanical coupling via membrane depolarization-mediated activation of voltage-dependent Ca(2+) channels (VDCC) is an important mechanism in regulating pulmonary vascular tone, while mouse is an animal model often used to study pathogenic mechanisms of pulmonary vascular disease. The function of VDCC in mouse pulmonary artery (PA) smooth muscle cells (PASMC), however, has not been characterized, and their functional role in reactive oxygen species (ROS)-mediated regulation of vascular function remains unclear. In this study, we characterized the electrophysiological and pharmacological properties of VDCC in PASMC and the divergent effects of ROS produced by xanthine oxidase (XO) and hypoxanthine (HX) on VDCC in PA and mesenteric artery (MA). Our data show that removal of extracellular Ca(2+) or application of nifedipine, a dihydropyridine VDCC blocker, both significantly inhibited 80 mM K(+)-mediated PA contraction. In freshly dissociated PASMC, the maximum inward Ca(2+) currents were -2.6 ± 0.2 pA/pF at +10 mV (with a holding potential of -70 mV). Window currents were between -40 and +10 mV with a peak at -15.4 mV. Nifedipine inhibited currents with an IC(50) of 0.023 μM, and 1 μM Bay K8644, a dihydropyridine VDCC agonist, increased the inward currents by 61%. XO/HX attenuated 60 mM K(+)-mediated increase in cytosolic free Ca(2+) concentration ([Ca(2+)](cyt)) due to Ca(2+) influx through VDCC in PASMC. Exposure to XO/HX caused relaxation in PA preconstricted by 80 mM K(+) but not in aorta and MA. In contrast, H(2)O(2) inhibited high K(+)-mediated increase in [Ca(2+)](cyt) and caused relaxation in both PA and MA. Indeed, RT-PCR and Western blot analysis revealed significantly lower expression of Ca(V)1.3 in MA compared with PA. Thus our study characterized the properties of VDCC and demonstrates that ROS differentially regulate vascular contraction by regulating VDCC in PA and systemic arteries.
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Affiliation(s)
- Eun A Ko
- Department of Medicine, Section of Pulmonary, Critical Care, Sleep and Allergy Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
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14
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Beloiartsev A, Baron DM, Yu B, Bloch KD, Zapol WM. Hemoglobin infusion does not alter murine pulmonary vascular tone. Nitric Oxide 2013; 30:1-8. [PMID: 23313572 DOI: 10.1016/j.niox.2012.12.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2012] [Revised: 12/18/2012] [Accepted: 12/28/2012] [Indexed: 12/31/2022]
Abstract
Plasma hemoglobin (Hb) scavenges endothelium-derived nitric oxide (NO), producing systemic and pulmonary vasoconstriction in many species. We hypothesized that i.v. administration of murine cell-free Hb would produce pulmonary vasoconstriction and enhance hypoxic pulmonary vasoconstriction (HPV) in mice. To assess the impact of plasma Hb on basal pulmonary vascular tone in anesthetized mice we measured left lung pulmonary vascular resistance (LPVRI) before and after infusion of Hb at thoracotomy. To confirm the findings obtained at thoracotomy, measurements of right ventricular systolic pressure (RVSP) and systemic arterial pressure (SAP) were obtained in closed-chest wild-type mice. To elucidate whether pretreatment with Hb augments HPV we assessed the increase in LPVRI before and during regional lung hypoxia produced by left mainstem bronchial occlusion (LMBO) in wild-type mice pretreated with Hb. Infusion of Hb increased SAP but did not change pulmonary arterial pressure (PAP), left lung pulmonary arterial flow (QLPA) or LPVRI in either wild-type or diabetic mice with endothelial dysfunction. Scavenging of NO by plasma Hb did not alter HPV in wild-type mice. Inhibition of NO synthase with l-NAME did not change the basal LPVRI, but augmented HPV during LMBO. Our data suggest that scavenging of NO by plasma Hb does not alter pulmonary vascular tone in mice. Therefore, generation of NO in the pulmonary circulation is unlikely to be responsible for the low basal pulmonary vascular tone of mice.
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Affiliation(s)
- Arkadi Beloiartsev
- Postdoctoral Fellow, Anesthesia Center for Critical Care Research of the Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114-2696, USA
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15
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Wang L, Yin J, Nickles HT, Ranke H, Tabuchi A, Hoffmann J, Tabeling C, Barbosa-Sicard E, Chanson M, Kwak BR, Shin HS, Wu S, Isakson BE, Witzenrath M, de Wit C, Fleming I, Kuppe H, Kuebler WM. Hypoxic pulmonary vasoconstriction requires connexin 40-mediated endothelial signal conduction. J Clin Invest 2012; 122:4218-30. [PMID: 23093775 PMCID: PMC3484430 DOI: 10.1172/jci59176] [Citation(s) in RCA: 100] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2011] [Accepted: 08/30/2012] [Indexed: 12/21/2022] Open
Abstract
Hypoxic pulmonary vasoconstriction (HPV) is a physiological mechanism by which pulmonary arteries constrict in hypoxic lung areas in order to redirect blood flow to areas with greater oxygen supply. Both oxygen sensing and the contractile response are thought to be intrinsic to pulmonary arterial smooth muscle cells. Here we speculated that the ideal site for oxygen sensing might instead be at the alveolocapillary level, with subsequent retrograde propagation to upstream arterioles via connexin 40 (Cx40) endothelial gap junctions. HPV was largely attenuated by Cx40-specific and nonspecific gap junction uncouplers in the lungs of wild-type mice and in lungs from mice lacking Cx40 (Cx40-/-). In vivo, hypoxemia was more severe in Cx40-/- mice than in wild-type mice. Real-time fluorescence imaging revealed that hypoxia caused endothelial membrane depolarization in alveolar capillaries that propagated to upstream arterioles in wild-type, but not Cx40-/-, mice. Transformation of endothelial depolarization into vasoconstriction involved endothelial voltage-dependent α1G subtype Ca2+ channels, cytosolic phospholipase A2, and epoxyeicosatrienoic acids. Based on these data, we propose that HPV originates at the alveolocapillary level, from which the hypoxic signal is propagated as endothelial membrane depolarization to upstream arterioles in a Cx40-dependent manner.
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MESH Headings
- Animals
- Calcium Channels/metabolism
- Connexins/genetics
- Connexins/metabolism
- Endothelium, Vascular/metabolism
- Endothelium, Vascular/pathology
- Endothelium, Vascular/physiopathology
- Human Umbilical Vein Endothelial Cells
- Humans
- Hypoxia/genetics
- Hypoxia/metabolism
- Hypoxia/pathology
- Hypoxia/physiopathology
- Lung/blood supply
- Lung/metabolism
- Lung/pathology
- Lung/physiopathology
- Mice
- Mice, Knockout
- Muscle, Smooth/metabolism
- Muscle, Smooth/pathology
- Muscle, Smooth/physiopathology
- Myocytes, Smooth Muscle/metabolism
- Myocytes, Smooth Muscle/pathology
- Phospholipases A2, Cytosolic/metabolism
- Pulmonary Artery/metabolism
- Pulmonary Artery/pathology
- Pulmonary Artery/physiopathology
- Signal Transduction
- Vasoconstriction
- Gap Junction alpha-5 Protein
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Affiliation(s)
- Liming Wang
- The Keenan Research Centre at the Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Ontario, Canada.
Institute of Physiology, Department of Internal Medicine, Charité-Universitätsmedizin, Berlin, Germany.
Department of Cardiothoracic Surgery, Affiliated People′s Hospital of Jiangsu University, Zhenjiang, China.
German Heart Institute, Berlin, Germany.
Division of Infectious Diseases and Pulmonary Medicine, Department of Internal Medicine, Charité-Universitätsmedizin Berlin, Germany.
Institute for Vascular Signalling, Centre for Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany.
Laboratory of Clinical Investigation III, Hôpitaux Universitaires de Genève (HUG), and
Department of Pathology and Immunology, Université de Genève, Genève, Switzerland.
Center for Neural Science, Korea Institute of Science and Technology, Seoul, Republic of Korea.
Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA.
Robert M. Berne Cardiovascular Research Center, Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA.
Institute of Physiology, University of Lübeck, Lübeck, Germany.
Department of Surgery and Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Jun Yin
- The Keenan Research Centre at the Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Ontario, Canada.
Institute of Physiology, Department of Internal Medicine, Charité-Universitätsmedizin, Berlin, Germany.
Department of Cardiothoracic Surgery, Affiliated People′s Hospital of Jiangsu University, Zhenjiang, China.
German Heart Institute, Berlin, Germany.
Division of Infectious Diseases and Pulmonary Medicine, Department of Internal Medicine, Charité-Universitätsmedizin Berlin, Germany.
Institute for Vascular Signalling, Centre for Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany.
Laboratory of Clinical Investigation III, Hôpitaux Universitaires de Genève (HUG), and
Department of Pathology and Immunology, Université de Genève, Genève, Switzerland.
Center for Neural Science, Korea Institute of Science and Technology, Seoul, Republic of Korea.
Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA.
Robert M. Berne Cardiovascular Research Center, Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA.
Institute of Physiology, University of Lübeck, Lübeck, Germany.
Department of Surgery and Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Hannah T. Nickles
- The Keenan Research Centre at the Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Ontario, Canada.
Institute of Physiology, Department of Internal Medicine, Charité-Universitätsmedizin, Berlin, Germany.
Department of Cardiothoracic Surgery, Affiliated People′s Hospital of Jiangsu University, Zhenjiang, China.
German Heart Institute, Berlin, Germany.
Division of Infectious Diseases and Pulmonary Medicine, Department of Internal Medicine, Charité-Universitätsmedizin Berlin, Germany.
Institute for Vascular Signalling, Centre for Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany.
Laboratory of Clinical Investigation III, Hôpitaux Universitaires de Genève (HUG), and
Department of Pathology and Immunology, Université de Genève, Genève, Switzerland.
Center for Neural Science, Korea Institute of Science and Technology, Seoul, Republic of Korea.
Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA.
Robert M. Berne Cardiovascular Research Center, Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA.
Institute of Physiology, University of Lübeck, Lübeck, Germany.
Department of Surgery and Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Hannes Ranke
- The Keenan Research Centre at the Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Ontario, Canada.
Institute of Physiology, Department of Internal Medicine, Charité-Universitätsmedizin, Berlin, Germany.
Department of Cardiothoracic Surgery, Affiliated People′s Hospital of Jiangsu University, Zhenjiang, China.
German Heart Institute, Berlin, Germany.
Division of Infectious Diseases and Pulmonary Medicine, Department of Internal Medicine, Charité-Universitätsmedizin Berlin, Germany.
Institute for Vascular Signalling, Centre for Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany.
Laboratory of Clinical Investigation III, Hôpitaux Universitaires de Genève (HUG), and
Department of Pathology and Immunology, Université de Genève, Genève, Switzerland.
Center for Neural Science, Korea Institute of Science and Technology, Seoul, Republic of Korea.
Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA.
Robert M. Berne Cardiovascular Research Center, Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA.
Institute of Physiology, University of Lübeck, Lübeck, Germany.
Department of Surgery and Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Arata Tabuchi
- The Keenan Research Centre at the Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Ontario, Canada.
Institute of Physiology, Department of Internal Medicine, Charité-Universitätsmedizin, Berlin, Germany.
Department of Cardiothoracic Surgery, Affiliated People′s Hospital of Jiangsu University, Zhenjiang, China.
German Heart Institute, Berlin, Germany.
Division of Infectious Diseases and Pulmonary Medicine, Department of Internal Medicine, Charité-Universitätsmedizin Berlin, Germany.
Institute for Vascular Signalling, Centre for Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany.
Laboratory of Clinical Investigation III, Hôpitaux Universitaires de Genève (HUG), and
Department of Pathology and Immunology, Université de Genève, Genève, Switzerland.
Center for Neural Science, Korea Institute of Science and Technology, Seoul, Republic of Korea.
Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA.
Robert M. Berne Cardiovascular Research Center, Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA.
Institute of Physiology, University of Lübeck, Lübeck, Germany.
Department of Surgery and Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Julia Hoffmann
- The Keenan Research Centre at the Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Ontario, Canada.
Institute of Physiology, Department of Internal Medicine, Charité-Universitätsmedizin, Berlin, Germany.
Department of Cardiothoracic Surgery, Affiliated People′s Hospital of Jiangsu University, Zhenjiang, China.
German Heart Institute, Berlin, Germany.
Division of Infectious Diseases and Pulmonary Medicine, Department of Internal Medicine, Charité-Universitätsmedizin Berlin, Germany.
Institute for Vascular Signalling, Centre for Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany.
Laboratory of Clinical Investigation III, Hôpitaux Universitaires de Genève (HUG), and
Department of Pathology and Immunology, Université de Genève, Genève, Switzerland.
Center for Neural Science, Korea Institute of Science and Technology, Seoul, Republic of Korea.
Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA.
Robert M. Berne Cardiovascular Research Center, Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA.
Institute of Physiology, University of Lübeck, Lübeck, Germany.
Department of Surgery and Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Christoph Tabeling
- The Keenan Research Centre at the Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Ontario, Canada.
Institute of Physiology, Department of Internal Medicine, Charité-Universitätsmedizin, Berlin, Germany.
Department of Cardiothoracic Surgery, Affiliated People′s Hospital of Jiangsu University, Zhenjiang, China.
German Heart Institute, Berlin, Germany.
Division of Infectious Diseases and Pulmonary Medicine, Department of Internal Medicine, Charité-Universitätsmedizin Berlin, Germany.
Institute for Vascular Signalling, Centre for Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany.
Laboratory of Clinical Investigation III, Hôpitaux Universitaires de Genève (HUG), and
Department of Pathology and Immunology, Université de Genève, Genève, Switzerland.
Center for Neural Science, Korea Institute of Science and Technology, Seoul, Republic of Korea.
Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA.
Robert M. Berne Cardiovascular Research Center, Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA.
Institute of Physiology, University of Lübeck, Lübeck, Germany.
Department of Surgery and Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Eduardo Barbosa-Sicard
- The Keenan Research Centre at the Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Ontario, Canada.
Institute of Physiology, Department of Internal Medicine, Charité-Universitätsmedizin, Berlin, Germany.
Department of Cardiothoracic Surgery, Affiliated People′s Hospital of Jiangsu University, Zhenjiang, China.
German Heart Institute, Berlin, Germany.
Division of Infectious Diseases and Pulmonary Medicine, Department of Internal Medicine, Charité-Universitätsmedizin Berlin, Germany.
Institute for Vascular Signalling, Centre for Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany.
Laboratory of Clinical Investigation III, Hôpitaux Universitaires de Genève (HUG), and
Department of Pathology and Immunology, Université de Genève, Genève, Switzerland.
Center for Neural Science, Korea Institute of Science and Technology, Seoul, Republic of Korea.
Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA.
Robert M. Berne Cardiovascular Research Center, Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA.
Institute of Physiology, University of Lübeck, Lübeck, Germany.
Department of Surgery and Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Marc Chanson
- The Keenan Research Centre at the Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Ontario, Canada.
Institute of Physiology, Department of Internal Medicine, Charité-Universitätsmedizin, Berlin, Germany.
Department of Cardiothoracic Surgery, Affiliated People′s Hospital of Jiangsu University, Zhenjiang, China.
German Heart Institute, Berlin, Germany.
Division of Infectious Diseases and Pulmonary Medicine, Department of Internal Medicine, Charité-Universitätsmedizin Berlin, Germany.
Institute for Vascular Signalling, Centre for Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany.
Laboratory of Clinical Investigation III, Hôpitaux Universitaires de Genève (HUG), and
Department of Pathology and Immunology, Université de Genève, Genève, Switzerland.
Center for Neural Science, Korea Institute of Science and Technology, Seoul, Republic of Korea.
Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA.
Robert M. Berne Cardiovascular Research Center, Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA.
Institute of Physiology, University of Lübeck, Lübeck, Germany.
Department of Surgery and Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Brenda R. Kwak
- The Keenan Research Centre at the Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Ontario, Canada.
Institute of Physiology, Department of Internal Medicine, Charité-Universitätsmedizin, Berlin, Germany.
Department of Cardiothoracic Surgery, Affiliated People′s Hospital of Jiangsu University, Zhenjiang, China.
German Heart Institute, Berlin, Germany.
Division of Infectious Diseases and Pulmonary Medicine, Department of Internal Medicine, Charité-Universitätsmedizin Berlin, Germany.
Institute for Vascular Signalling, Centre for Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany.
Laboratory of Clinical Investigation III, Hôpitaux Universitaires de Genève (HUG), and
Department of Pathology and Immunology, Université de Genève, Genève, Switzerland.
Center for Neural Science, Korea Institute of Science and Technology, Seoul, Republic of Korea.
Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA.
Robert M. Berne Cardiovascular Research Center, Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA.
Institute of Physiology, University of Lübeck, Lübeck, Germany.
Department of Surgery and Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Hee-Sup Shin
- The Keenan Research Centre at the Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Ontario, Canada.
Institute of Physiology, Department of Internal Medicine, Charité-Universitätsmedizin, Berlin, Germany.
Department of Cardiothoracic Surgery, Affiliated People′s Hospital of Jiangsu University, Zhenjiang, China.
German Heart Institute, Berlin, Germany.
Division of Infectious Diseases and Pulmonary Medicine, Department of Internal Medicine, Charité-Universitätsmedizin Berlin, Germany.
Institute for Vascular Signalling, Centre for Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany.
Laboratory of Clinical Investigation III, Hôpitaux Universitaires de Genève (HUG), and
Department of Pathology and Immunology, Université de Genève, Genève, Switzerland.
Center for Neural Science, Korea Institute of Science and Technology, Seoul, Republic of Korea.
Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA.
Robert M. Berne Cardiovascular Research Center, Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA.
Institute of Physiology, University of Lübeck, Lübeck, Germany.
Department of Surgery and Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Songwei Wu
- The Keenan Research Centre at the Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Ontario, Canada.
Institute of Physiology, Department of Internal Medicine, Charité-Universitätsmedizin, Berlin, Germany.
Department of Cardiothoracic Surgery, Affiliated People′s Hospital of Jiangsu University, Zhenjiang, China.
German Heart Institute, Berlin, Germany.
Division of Infectious Diseases and Pulmonary Medicine, Department of Internal Medicine, Charité-Universitätsmedizin Berlin, Germany.
Institute for Vascular Signalling, Centre for Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany.
Laboratory of Clinical Investigation III, Hôpitaux Universitaires de Genève (HUG), and
Department of Pathology and Immunology, Université de Genève, Genève, Switzerland.
Center for Neural Science, Korea Institute of Science and Technology, Seoul, Republic of Korea.
Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA.
Robert M. Berne Cardiovascular Research Center, Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA.
Institute of Physiology, University of Lübeck, Lübeck, Germany.
Department of Surgery and Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Brant E. Isakson
- The Keenan Research Centre at the Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Ontario, Canada.
Institute of Physiology, Department of Internal Medicine, Charité-Universitätsmedizin, Berlin, Germany.
Department of Cardiothoracic Surgery, Affiliated People′s Hospital of Jiangsu University, Zhenjiang, China.
German Heart Institute, Berlin, Germany.
Division of Infectious Diseases and Pulmonary Medicine, Department of Internal Medicine, Charité-Universitätsmedizin Berlin, Germany.
Institute for Vascular Signalling, Centre for Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany.
Laboratory of Clinical Investigation III, Hôpitaux Universitaires de Genève (HUG), and
Department of Pathology and Immunology, Université de Genève, Genève, Switzerland.
Center for Neural Science, Korea Institute of Science and Technology, Seoul, Republic of Korea.
Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA.
Robert M. Berne Cardiovascular Research Center, Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA.
Institute of Physiology, University of Lübeck, Lübeck, Germany.
Department of Surgery and Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Martin Witzenrath
- The Keenan Research Centre at the Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Ontario, Canada.
Institute of Physiology, Department of Internal Medicine, Charité-Universitätsmedizin, Berlin, Germany.
Department of Cardiothoracic Surgery, Affiliated People′s Hospital of Jiangsu University, Zhenjiang, China.
German Heart Institute, Berlin, Germany.
Division of Infectious Diseases and Pulmonary Medicine, Department of Internal Medicine, Charité-Universitätsmedizin Berlin, Germany.
Institute for Vascular Signalling, Centre for Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany.
Laboratory of Clinical Investigation III, Hôpitaux Universitaires de Genève (HUG), and
Department of Pathology and Immunology, Université de Genève, Genève, Switzerland.
Center for Neural Science, Korea Institute of Science and Technology, Seoul, Republic of Korea.
Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA.
Robert M. Berne Cardiovascular Research Center, Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA.
Institute of Physiology, University of Lübeck, Lübeck, Germany.
Department of Surgery and Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Cor de Wit
- The Keenan Research Centre at the Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Ontario, Canada.
Institute of Physiology, Department of Internal Medicine, Charité-Universitätsmedizin, Berlin, Germany.
Department of Cardiothoracic Surgery, Affiliated People′s Hospital of Jiangsu University, Zhenjiang, China.
German Heart Institute, Berlin, Germany.
Division of Infectious Diseases and Pulmonary Medicine, Department of Internal Medicine, Charité-Universitätsmedizin Berlin, Germany.
Institute for Vascular Signalling, Centre for Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany.
Laboratory of Clinical Investigation III, Hôpitaux Universitaires de Genève (HUG), and
Department of Pathology and Immunology, Université de Genève, Genève, Switzerland.
Center for Neural Science, Korea Institute of Science and Technology, Seoul, Republic of Korea.
Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA.
Robert M. Berne Cardiovascular Research Center, Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA.
Institute of Physiology, University of Lübeck, Lübeck, Germany.
Department of Surgery and Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Ingrid Fleming
- The Keenan Research Centre at the Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Ontario, Canada.
Institute of Physiology, Department of Internal Medicine, Charité-Universitätsmedizin, Berlin, Germany.
Department of Cardiothoracic Surgery, Affiliated People′s Hospital of Jiangsu University, Zhenjiang, China.
German Heart Institute, Berlin, Germany.
Division of Infectious Diseases and Pulmonary Medicine, Department of Internal Medicine, Charité-Universitätsmedizin Berlin, Germany.
Institute for Vascular Signalling, Centre for Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany.
Laboratory of Clinical Investigation III, Hôpitaux Universitaires de Genève (HUG), and
Department of Pathology and Immunology, Université de Genève, Genève, Switzerland.
Center for Neural Science, Korea Institute of Science and Technology, Seoul, Republic of Korea.
Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA.
Robert M. Berne Cardiovascular Research Center, Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA.
Institute of Physiology, University of Lübeck, Lübeck, Germany.
Department of Surgery and Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Hermann Kuppe
- The Keenan Research Centre at the Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Ontario, Canada.
Institute of Physiology, Department of Internal Medicine, Charité-Universitätsmedizin, Berlin, Germany.
Department of Cardiothoracic Surgery, Affiliated People′s Hospital of Jiangsu University, Zhenjiang, China.
German Heart Institute, Berlin, Germany.
Division of Infectious Diseases and Pulmonary Medicine, Department of Internal Medicine, Charité-Universitätsmedizin Berlin, Germany.
Institute for Vascular Signalling, Centre for Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany.
Laboratory of Clinical Investigation III, Hôpitaux Universitaires de Genève (HUG), and
Department of Pathology and Immunology, Université de Genève, Genève, Switzerland.
Center for Neural Science, Korea Institute of Science and Technology, Seoul, Republic of Korea.
Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA.
Robert M. Berne Cardiovascular Research Center, Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA.
Institute of Physiology, University of Lübeck, Lübeck, Germany.
Department of Surgery and Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Wolfgang M. Kuebler
- The Keenan Research Centre at the Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Ontario, Canada.
Institute of Physiology, Department of Internal Medicine, Charité-Universitätsmedizin, Berlin, Germany.
Department of Cardiothoracic Surgery, Affiliated People′s Hospital of Jiangsu University, Zhenjiang, China.
German Heart Institute, Berlin, Germany.
Division of Infectious Diseases and Pulmonary Medicine, Department of Internal Medicine, Charité-Universitätsmedizin Berlin, Germany.
Institute for Vascular Signalling, Centre for Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany.
Laboratory of Clinical Investigation III, Hôpitaux Universitaires de Genève (HUG), and
Department of Pathology and Immunology, Université de Genève, Genève, Switzerland.
Center for Neural Science, Korea Institute of Science and Technology, Seoul, Republic of Korea.
Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA.
Robert M. Berne Cardiovascular Research Center, Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA.
Institute of Physiology, University of Lübeck, Lübeck, Germany.
Department of Surgery and Department of Physiology, University of Toronto, Toronto, Ontario, Canada
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16
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Calderon LE, Liu S, Su W, Xie Z, Guo Z, Eberhard W, Gong MC. iPLA2β overexpression in smooth muscle exacerbates angiotensin II-induced hypertension and vascular remodeling. PLoS One 2012; 7:e31850. [PMID: 22363752 PMCID: PMC3282780 DOI: 10.1371/journal.pone.0031850] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2011] [Accepted: 01/13/2012] [Indexed: 12/12/2022] Open
Abstract
Objectives Calcium independent group VIA phospholipase A2 (iPLA2β) is up-regulated in vascular smooth muscle cells in some diseases, but whether the up-regulated iPLA2β affects vascular morphology and blood pressure is unknown. The current study addresses this question by evaluating the basal- and angiotensin II infusion-induced vascular remodeling and hypertension in smooth muscle specific iPLA2β transgenic (iPLA2β -Tg) mice. Method and Results Blood pressure was monitored by radiotelemetry and vascular remodeling was assessed by morphologic analysis. We found that the angiotensin II-induced increase in diastolic pressure was significantly higher in iPLA2β-Tg than iPLA2β-Wt mice, whereas, the basal blood pressure was not significantly different. The media thickness and media∶lumen ratio of the mesenteric arteries were significantly increased in angiotensin II-infused iPLA2β-Tg mice. Analysis revealed no difference in vascular smooth muscle cell proliferation. In contrast, adenovirus-mediated iPLA2β overexpression in cultured vascular smooth muscle cells promoted angiotensin II-induced [3H]-leucine incorporation, indicating enhanced hypertrophy. Moreover, angiotensin II infusion-induced c-Jun phosphorylation in vascular smooth muscle cells overexpressing iPLA2β to higher levels, which was abolished by inhibition of 12/15 lipoxygenase. In addition, we found that angiotensin II up-regulated the endogenous iPLA2β protein in-vitro and in-vivo. Conclusion The present study reports that iPLA2β up-regulation exacerbates angiotensin II-induced vascular smooth muscle cell hypertrophy, vascular remodeling and hypertension via the 12/15 lipoxygenase and c-Jun pathways.
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MESH Headings
- Angiotensin II/administration & dosage
- Angiotensin II/pharmacology
- Animals
- Aorta, Thoracic/drug effects
- Aorta, Thoracic/physiopathology
- Arachidonate 15-Lipoxygenase
- Arachidonic Acid/metabolism
- Blood Pressure/drug effects
- Cell Proliferation/drug effects
- Diastole/drug effects
- Group VI Phospholipases A2/metabolism
- Hypertension/enzymology
- Hypertension/pathology
- Hypertension/physiopathology
- Hypertrophy
- Leucine/metabolism
- Mesenteric Arteries/drug effects
- Mesenteric Arteries/physiopathology
- Mice
- Mice, Inbred C57BL
- Mice, Transgenic
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/enzymology
- Muscle, Smooth, Vascular/pathology
- Muscle, Smooth, Vascular/physiopathology
- Myocytes, Smooth Muscle/drug effects
- Myocytes, Smooth Muscle/enzymology
- Myocytes, Smooth Muscle/pathology
- Organ Specificity/drug effects
- Proto-Oncogene Proteins c-jun/metabolism
- Rats
- Signal Transduction/drug effects
- p38 Mitogen-Activated Protein Kinases/metabolism
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Affiliation(s)
- Lindsay E. Calderon
- Department of Molecular and Biomedical Pharmacology, University of Kentucky, Lexington, Kentucky, United States of America
| | - Shu Liu
- Department of Internal Medicine, University of Kentucky, Lexington, Kentucky, United States of America
| | - Wen Su
- Department of Internal Medicine, University of Kentucky, Lexington, Kentucky, United States of America
| | - Zhongwen Xie
- Department of Physiology, University of Kentucky, Lexington, Kentucky, United States of America
| | - Zhenheng Guo
- Department of Internal Medicine, University of Kentucky, Lexington, Kentucky, United States of America
| | - Wanda Eberhard
- Department of Physiology, University of Kentucky, Lexington, Kentucky, United States of America
| | - Ming C. Gong
- Department of Physiology, University of Kentucky, Lexington, Kentucky, United States of America
- * E-mail:
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17
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Petersen B, Austen KF, Bloch KD, Hotta Y, Ichinose F, Kanaoka Y, Zapol WM. Cysteinyl leukotrienes impair hypoxic pulmonary vasoconstriction in endotoxemic mice. Anesthesiology 2011; 115:804-11. [PMID: 21934409 PMCID: PMC3194098 DOI: 10.1097/aln.0b013e31822e94bd] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
BACKGROUND Sepsis impairs hypoxic pulmonary vasoconstriction (HPV) in patients and animal models, contributing to systemic hypoxemia. Concentrations of cysteinyl leukotrienes are increased in the bronchoalveolar lavage fluid of patients with sepsis, but the contribution of cysteinyl leukotrienes to the impairment of HPV is unknown. METHODS Wild-type mice, mice deficient in leukotriene C(4) synthase, the enzyme responsible for cysteinyl leukotriene synthesis, and mice deficient in cysteinyl leukotriene receptor 1 were studied 18 h after challenge with either saline or endotoxin. HPV was measured by the increase in left pulmonary vascular resistance induced by left mainstem bronchus occlusion. Concentrations of cysteinyl leukotrienes were determined in the bronchoalveolar lavage fluid. RESULTS In the bronchoalveolar lavage fluid of all three strains, cysteinyl leukotrienes were not detectable after saline challenge; whereas endotoxin challenge increased cysteinyl leukotriene concentrations in wild-type mice and mice deficient in cysteinyl leukotriene receptor 1, but not in mice deficient in leukotriene C(4) synthase. HPV did not differ among the three mouse strains after saline challenge (120 ± 26, 114 ± 16, and 115 ± 24%, respectively; mean ± SD). Endotoxin challenge markedly impaired HPV in wild-type mice (41 ± 20%) but only marginally in mice deficient in leukotriene C(4) synthase (96 ± 16%, P < 0.05 vs. wild-type mice), thereby preserving systemic oxygenation. Although endotoxin modestly decreased HPV in mice deficient in cysteinyl leukotriene receptor 1 (80 ± 29%, P < 0.05 vs. saline challenge), the magnitude of impairment was markedly less than in endotoxin-challenged wild-type mice. CONCLUSION Cysteinyl leukotrienes importantly contribute to endotoxin-induced impairment of HPV in part via a cysteinyl leukotriene receptor 1-dependent mechanism.
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Affiliation(s)
- Bodil Petersen
- Department of Anesthesia and Critical Care, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
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18
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Host cytosolic phospholipase A₂α contributes to group B Streptococcus penetration of the blood-brain barrier. Infect Immun 2011; 79:4088-93. [PMID: 21825068 DOI: 10.1128/iai.05506-11] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Group B Streptococcus (GBS) is the most common bacterium causing neonatal meningitis, and neonatal GBS meningitis continues to be an important cause of mortality and morbidity. Here we provide the first direct evidence that host cytosolic phospholipase A₂α (cPLA₂α) contributes to type III GBS invasion of human brain microvascular endothelial cells (HBMEC), which constitute the blood-brain barrier and penetration into the brain, the key step required for the development of GBS meningitis. This was shown by our demonstration that pharmacological inhibition and gene deletion of cPLA₂α significantly decreased GBS invasion of the HBMEC monolayer and penetration into the brain. cPLA₂α releases arachidonic acid from membrane phospholipids, and we showed that the contribution of cPLA₂α to GBS invasion of HBMEC involved lipoxygenated metabolites of arachidonic acid, cysteinyl leukotrienes (LTs). In addition, type III GBS invasion of the HBMEC monolayer involves protein kinase Cα (PKCα), as shown by time-dependent PKCα activation in response to GBS as well as decreased GBS invasion in HBMEC expressing dominant-negative PKCα. PKCα activation in response to GBS, however, was abolished by inhibition of cPLA₂α and cysteinyl LTs, suggesting that cPLA₂α and cysteinyl LTs contribute to type III GBS invasion of the HBMEC monolayer via PKCα. These findings demonstrate that specific host factors involving cPLA₂α and cysteinyl LTs contribute to type III GBS penetration of the blood-brain barrier and their contribution involves PKCα.
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Nisbet RE, Sutliff RL, Hart CM. The role of peroxisome proliferator-activated receptors in pulmonary vascular disease. PPAR Res 2011; 2007:18797. [PMID: 17710111 PMCID: PMC1940049 DOI: 10.1155/2007/18797] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2007] [Accepted: 04/30/2007] [Indexed: 02/07/2023] Open
Abstract
Peroxisome proliferator-activated receptors (PPARs) are ligand-activated transcription factors belonging to the nuclear hormone
receptor superfamily that regulate diverse physiological processes ranging from lipogenesis to inflammation. Recent evidence has
established potential roles of PPARs in both systemic and pulmonary vascular disease and function. Existing treatment strategies
for pulmonary hypertension, the most common manifestation of pulmonary vascular disease, are limited by an incomplete
understanding of the underlying disease pathogenesis and lack of efficacy indicating an urgent need for new approaches to treat
this disorder. Derangements in pulmonary endothelial-derived mediators and endothelial dysfunction have been shown to play a
pivotal role in pulmonary hypertension pathogenesis. Therefore, the following review will focus on selected mediators implicated
in pulmonary vascular dysfunction and evidence that PPARs, in particular PPARγ, participate in their regulation and may provide
a potential novel therapeutic target for the treatment of pulmonary hypertension.
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Affiliation(s)
- Rachel E. Nisbet
- Department of Medicine, Emory University, Atlanta Veterans Affairs Medical Center, Decatur, GA 30033, USA
- *Rachel E. Nisbet:
| | - Roy L. Sutliff
- Department of Medicine, Emory University, Atlanta Veterans Affairs Medical Center, Decatur, GA 30033, USA
| | - C. Michael Hart
- Department of Medicine, Emory University, Atlanta Veterans Affairs Medical Center, Decatur, GA 30033, USA
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20
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Zhu L, Maruvada R, Sapirstein A, Malik KU, Peters-Golden M, Kim KS. Arachidonic acid metabolism regulates Escherichia coli penetration of the blood-brain barrier. Infect Immun 2010; 78:4302-10. [PMID: 20696828 PMCID: PMC2950368 DOI: 10.1128/iai.00624-10] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2010] [Revised: 07/09/2010] [Accepted: 07/30/2010] [Indexed: 01/29/2023] Open
Abstract
Escherichia coli K1 meningitis occurs following penetration of the blood-brain barrier, but the underlying mechanisms involved in E. coli penetration of the blood-brain barrier remain incompletely understood. We have previously shown that host cytosolic phospholipase A(2)α (cPLA(2)α) contributes to E. coli invasion of human brain microvascular endothelial cells (HBMEC), which constitute the blood-brain barrier, but the underlying mechanisms remain unclear. cPLA(2)α selectively liberates arachidonic acid from membrane phospholipids. Here, we provide the first direct evidence that host 5-lipoxygenase and lipoxygenase products of arachidonic acid, cysteinyl leukotrienes (LTs), contribute to E. coli K1 invasion of HBMEC and penetration into the brain, and their contributions involve protein kinase C alpha (PKCα). These findings demonstrate that arachidonic acid metabolism regulates E. coli penetration of the blood-brain barrier, and studies are needed to further elucidate the mechanisms involved with metabolic products of arachidonic acid for their contribution to E. coli invasion of the blood-brain barrier.
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Affiliation(s)
- Longkun Zhu
- Division of Pediatric Infectious Diseases, Department of Pediatrics, Johns Hopkins University School of Medicine, 200 North Wolfe St., Room 3157, Baltimore, Maryland 21287, Department of Anesthesiology and Critical Care Medicine, 600 North Wolfe Street, Meyer 297-A, Baltimore, Maryland 21287, Department of Pharmacology, College of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee 38163, Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, 6301 MSRB III, 1150 W. Medical Center Drive, Ann Arbor, Michigan 48109
| | - Ravi Maruvada
- Division of Pediatric Infectious Diseases, Department of Pediatrics, Johns Hopkins University School of Medicine, 200 North Wolfe St., Room 3157, Baltimore, Maryland 21287, Department of Anesthesiology and Critical Care Medicine, 600 North Wolfe Street, Meyer 297-A, Baltimore, Maryland 21287, Department of Pharmacology, College of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee 38163, Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, 6301 MSRB III, 1150 W. Medical Center Drive, Ann Arbor, Michigan 48109
| | - Adam Sapirstein
- Division of Pediatric Infectious Diseases, Department of Pediatrics, Johns Hopkins University School of Medicine, 200 North Wolfe St., Room 3157, Baltimore, Maryland 21287, Department of Anesthesiology and Critical Care Medicine, 600 North Wolfe Street, Meyer 297-A, Baltimore, Maryland 21287, Department of Pharmacology, College of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee 38163, Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, 6301 MSRB III, 1150 W. Medical Center Drive, Ann Arbor, Michigan 48109
| | - Kafait U. Malik
- Division of Pediatric Infectious Diseases, Department of Pediatrics, Johns Hopkins University School of Medicine, 200 North Wolfe St., Room 3157, Baltimore, Maryland 21287, Department of Anesthesiology and Critical Care Medicine, 600 North Wolfe Street, Meyer 297-A, Baltimore, Maryland 21287, Department of Pharmacology, College of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee 38163, Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, 6301 MSRB III, 1150 W. Medical Center Drive, Ann Arbor, Michigan 48109
| | - Marc Peters-Golden
- Division of Pediatric Infectious Diseases, Department of Pediatrics, Johns Hopkins University School of Medicine, 200 North Wolfe St., Room 3157, Baltimore, Maryland 21287, Department of Anesthesiology and Critical Care Medicine, 600 North Wolfe Street, Meyer 297-A, Baltimore, Maryland 21287, Department of Pharmacology, College of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee 38163, Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, 6301 MSRB III, 1150 W. Medical Center Drive, Ann Arbor, Michigan 48109
| | - Kwang Sik Kim
- Division of Pediatric Infectious Diseases, Department of Pediatrics, Johns Hopkins University School of Medicine, 200 North Wolfe St., Room 3157, Baltimore, Maryland 21287, Department of Anesthesiology and Critical Care Medicine, 600 North Wolfe Street, Meyer 297-A, Baltimore, Maryland 21287, Department of Pharmacology, College of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee 38163, Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan, 6301 MSRB III, 1150 W. Medical Center Drive, Ann Arbor, Michigan 48109
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Keserü B, Barbosa-Sicard E, Popp R, Fisslthaler B, Dietrich A, Gudermann T, Hammock BD, Falck JR, Weissmann N, Busse R, Fleming I. Epoxyeicosatrienoic acids and the soluble epoxide hydrolase are determinants of pulmonary artery pressure and the acute hypoxic pulmonary vasoconstrictor response. FASEB J 2008; 22:4306-15. [PMID: 18725458 DOI: 10.1096/fj.08-112821] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Recent findings have indicated a role for cytochrome P-450 (CYP) epoxygenase-derived epoxyeicosatrienoic acids (EETs) in acute hypoxic pulmonary vasoconstriction (HPV). Given that the intracellular concentration of EETs is determined by the soluble epoxide hydrolase (sEH), we assessed the influence of the sEH and 11,12-EET on pulmonary artery pressure and HPV in the isolated mouse lung. In lungs from wild-type mice, HPV was significantly increased by sEH inhibition, an effect abolished by pretreatment with CYP epoxygenase inhibitors and the EET antagonist 14,15-EEZE. HPV and EET production were greater in lungs from sEH(-/-) mice than from wild-type mice and sEH inhibition had no further effect on HPV, while MSPPOH and 14,15-EEZE decreased the response. 11,12-EET increased pulmonary artery pressure in a concentration-dependent manner and enhanced HPV via a Rho-dependent mechanism. Both 11,12-EET and hypoxia elicited the membrane translocation of a transient receptor potential (TRP) C6-V5 fusion protein, the latter effect was sensitive to 14,15-EEZE. Moreover, while acute hypoxia and 11,12-EET increased pulmonary pressure in lungs from TRPC6(+/-) mice, lungs from TRPC6(-/-) mice did not respond to either stimuli. These data demonstrate that CYP-derived EETs are involved in HPV and that EET-induced pulmonary contraction under normoxic and hypoxic conditions involves a TRPC6-dependent pathway.
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Affiliation(s)
- Benjamin Keserü
- Vascular Signalling Group, Institut für Kardiovaskuläre Physiologie, Goethe-Universität Theodor-Stern-Kai 7, D-60590 Frankfurt am Main, Germany
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22
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Pokreisz P, Fleming I, Kiss L, Barbosa-Sicard E, Fisslthaler B, Falck JR, Hammock BD, Kim IH, Szelid Z, Vermeersch P, Gillijns H, Pellens M, Grimminger F, van Zonneveld AJ, Collen D, Busse R, Janssens S. Cytochrome P450 epoxygenase gene function in hypoxic pulmonary vasoconstriction and pulmonary vascular remodeling. Hypertension 2006; 47:762-70. [PMID: 16505204 PMCID: PMC1993904 DOI: 10.1161/01.hyp.0000208299.62535.58] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We assessed pulmonary cytochrome P450 (CYP) epoxygenase expression and activity during hypoxia and explored the effects of modulating epoxygenase activity on pulmonary hypertension. The acute hypoxic vasoconstrictor response was studied in Swiss Webster mice, who express CYP2C29 in their lungs. Animals were pretreated with vehicle, the epoxygenase inhibitor (N-methylsulfonyl-6-[2-propargyloxyphenyl] hexanamide) or an inhibitor of the soluble epoxide hydrolase. Whereas the epoxygenase inhibitor attenuated hypoxic pulmonary constriction (by 52%), the soluble epoxide hydrolase inhibitor enhanced the response (by 39%), indicating that CYP epoxygenase-derived epoxyeicosatrienoic acids elicit pulmonary vasoconstriction. Aerosol gene transfer of recombinant adenovirus containing the human CYP2C9 significantly elevated mean pulmonary artery pressure and total pulmonary resistance indices, both of which were sensitive to the inhibitor sulfaphenazole. The prolonged exposure of mice to hypoxia increased CYP2C29 expression, and transcript levels increased 5-fold after exposure to normobaric hypoxia (FIO2 0.07) for 2 hours. This was followed by a 2-fold increase in protein expression and by a significant increase in epoxyeicosatrienoic acid production after 24 hours. Chronic hypoxia (7 days) elicited pulmonary hypertension and pulmonary vascular remodeling, effects that were significantly attenuated in animals continually treated with N-methylsulfonyl-6-[2-propargyloxyphenyl] hexanamide (-46% and -55%, respectively). Our results indicate that endogenously generated epoxygenase products are associated with hypoxic pulmonary hypertension in mice and that selective epoxygenase inhibition significantly reduces acute hypoxic pulmonary vasoconstriction and chronic hypoxia-induced pulmonary vascular remodeling. These observations indicate potential novel targets for the treatment of pulmonary hypertension and highlight a pivotal role for CYP epoxygenases in pulmonary responses to hypoxia.
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Affiliation(s)
- Peter Pokreisz
- Center for Transgene Technology and Gene Therapy, Flanders Interuniversity Institute of Biotechnology, University of Leuven, Belgium
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23
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Caironi P, Ichinose F, Liu R, Jones RC, Bloch KD, Zapol WM. 5-Lipoxygenase deficiency prevents respiratory failure during ventilator-induced lung injury. Am J Respir Crit Care Med 2005; 172:334-43. [PMID: 15894604 PMCID: PMC2718472 DOI: 10.1164/rccm.200501-034oc] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2005] [Accepted: 05/04/2005] [Indexed: 11/16/2022] Open
Abstract
RATIONALE Mechanical ventilation with high VT (HVT) progressively leads to lung injury and decreased efficiency of gas exchange. Hypoxic pulmonary vasoconstriction (HPV) directs blood flow to well-ventilated lung regions, preserving systemic oxygenation during pulmonary injury. Recent experimental studies have revealed an important role for leukotriene (LT) biosynthesis by 5-lipoxygenase (5LO) in the impairment of HPV by endotoxin. OBJECTIVES To investigate whether or not impairment of HPV contributes to the hypoxemia associated with HVT and to evaluate the role of LTs in ventilator-induced lung injury. METHODS We studied wild-type and 5LO-deficient mice ventilated for up to 10 hours with low VT (LVT) or HVT. RESULTS In wild-type mice, HVT, but not LVT, increased pulmonary vascular permeability and edema formation, impaired systemic oxygenation, and reduced survival. HPV, as reflected by the increase in left pulmonary vascular resistance induced by left mainstem bronchus occlusion, was markedly impaired in animals ventilated with HVT. HVT ventilation increased bronchoalveolar lavage levels of LTs and neutrophils. In 5LO-deficient mice, the HVT-induced increase of pulmonary vascular permeability and worsening of respiratory mechanics were markedly attenuated, systemic oxygenation was preserved, and survival increased. Moreover, in 5LO-deficient mice, HVT ventilation did not impair the ability of left mainstem bronchus occlusion to increase left pulmonary vascular resistance. Administration of MK886, a 5LO-activity inhibitor, or MK571, a selective cysteinyl-LT(1) receptor antagonist, largely prevented ventilator-induced lung injury. CONCLUSIONS These results indicate that LTs play a central role in the lung injury and impaired oxygenation induced by HVT ventilation.
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Affiliation(s)
- Pietro Caironi
- Department of Anesthesia and Critical Care, Massachusetts General Hospital, Harvard Medical School, Boston, 02114, USA
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