Continuous inhalation of carbon monoxide induces right ventricle ischemia and dysfunction in rats with hypoxic pulmonary hypertension

1 University Francois Rabelais of Tours, IFR 135, Labpart EA 3852, Tours Cedex; and 2 Pfizer Global Research and Development, Centre de Recherche, Amboise Cedex, France Submitted 22 September 2006 ; accepted in final form 3 May 2007 We aimed to investigate the toxicity of carbon monoxide (CO) in rat...

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Veröffentlicht in:American journal of physiology. Heart and circulatory physiology 2007-08, Vol.293 (2), p.H1046-H1052
Hauptverfasser: Gautier, Mathieu, Antier, Daniel, Bonnet, Pierre, Net, Jean-Loic Le, Hanton, Gilles, Eder, Veronique
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container_end_page H1052
container_issue 2
container_start_page H1046
container_title American journal of physiology. Heart and circulatory physiology
container_volume 293
creator Gautier, Mathieu
Antier, Daniel
Bonnet, Pierre
Net, Jean-Loic Le
Hanton, Gilles
Eder, Veronique
description 1 University Francois Rabelais of Tours, IFR 135, Labpart EA 3852, Tours Cedex; and 2 Pfizer Global Research and Development, Centre de Recherche, Amboise Cedex, France Submitted 22 September 2006 ; accepted in final form 3 May 2007 We aimed to investigate the toxicity of carbon monoxide (CO) in rats with right ventricle (RV) remodeling induced by hypoxic pulmonary hypertension (PHT). A group of Wistar rats was exposed to 3-wk hypobaric hypoxia (H). A second group was exposed to 50 ppm CO for 1 wk (CO). A third group was exposed to chronic hypoxia including 50 ppm CO during the third week (H+CO). These groups were compared with controls. RV and left ventricle (LV) functions were assessed by echocardiography and transparietal catheterization. Ventricular perfusion was estimated with the fluorescent microsphere method. Results were confirmed by histology. PHT induced RV hypertrophy and function enhancement. In the H group, RV shortening fraction (RVSF; 71 ± 12% vs. 41 ± 2%) and RV end-systolic pressure (RVESP; 54 ± 6 vs. 19 ± 2 mmHg) were increased compared with controls. Moreover, myocardial perfusion was increased in the RV (36 ± 2% vs. 22 ± 2%) and decreased in the LV (64 ± 3% vs. 78 ± 2%). In the H+CO group, RVSF (45 ± 3% vs. 71 ± 12%) and RVESP (38 ± 3 vs. 54 ± 6 mmHg) were decreased compared with the H group. RV perfusion was decreased in the H+CO group compared with the H group (21 ± 5% vs. 36 ± 2%), and LV perfusion was increased (79 ± 5% vs. 64 ± 3%). PHT and RV hypertrophy were still present in the H+CO group, and fibroses localized in the RV were detected. Similar lesions were observed in an additional group exposed simultaneously to hypoxia and 50 ppm CO over 3 wk. We demonstrated that rats with established PHT were more sensitive to CO, which dramatically alters the RV adaptive response to PHT, leading to ischemic lesions. right ventricle remodeling; right ventricle perfusion Address for reprint requests and other correspondence: V. Eder, Labpart EA 3852, Fac. of Medicine, Univ. Francois Rabelais, 10 Bld Tonnelle, BP 3223, 37032 Tours Cedex 1, France (e-mail: eder{at}med.univ-tours.fr )
doi_str_mv 10.1152/ajpheart.01040.2006
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A group of Wistar rats was exposed to 3-wk hypobaric hypoxia (H). A second group was exposed to 50 ppm CO for 1 wk (CO). A third group was exposed to chronic hypoxia including 50 ppm CO during the third week (H+CO). These groups were compared with controls. RV and left ventricle (LV) functions were assessed by echocardiography and transparietal catheterization. Ventricular perfusion was estimated with the fluorescent microsphere method. Results were confirmed by histology. PHT induced RV hypertrophy and function enhancement. In the H group, RV shortening fraction (RVSF; 71 ± 12% vs. 41 ± 2%) and RV end-systolic pressure (RVESP; 54 ± 6 vs. 19 ± 2 mmHg) were increased compared with controls. Moreover, myocardial perfusion was increased in the RV (36 ± 2% vs. 22 ± 2%) and decreased in the LV (64 ± 3% vs. 78 ± 2%). In the H+CO group, RVSF (45 ± 3% vs. 71 ± 12%) and RVESP (38 ± 3 vs. 54 ± 6 mmHg) were decreased compared with the H group. RV perfusion was decreased in the H+CO group compared with the H group (21 ± 5% vs. 36 ± 2%), and LV perfusion was increased (79 ± 5% vs. 64 ± 3%). PHT and RV hypertrophy were still present in the H+CO group, and fibroses localized in the RV were detected. Similar lesions were observed in an additional group exposed simultaneously to hypoxia and 50 ppm CO over 3 wk. We demonstrated that rats with established PHT were more sensitive to CO, which dramatically alters the RV adaptive response to PHT, leading to ischemic lesions. right ventricle remodeling; right ventricle perfusion Address for reprint requests and other correspondence: V. Eder, Labpart EA 3852, Fac. of Medicine, Univ. 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Heart and circulatory physiology</title><addtitle>Am J Physiol Heart Circ Physiol</addtitle><description>1 University Francois Rabelais of Tours, IFR 135, Labpart EA 3852, Tours Cedex; and 2 Pfizer Global Research and Development, Centre de Recherche, Amboise Cedex, France Submitted 22 September 2006 ; accepted in final form 3 May 2007 We aimed to investigate the toxicity of carbon monoxide (CO) in rats with right ventricle (RV) remodeling induced by hypoxic pulmonary hypertension (PHT). A group of Wistar rats was exposed to 3-wk hypobaric hypoxia (H). A second group was exposed to 50 ppm CO for 1 wk (CO). A third group was exposed to chronic hypoxia including 50 ppm CO during the third week (H+CO). These groups were compared with controls. RV and left ventricle (LV) functions were assessed by echocardiography and transparietal catheterization. Ventricular perfusion was estimated with the fluorescent microsphere method. Results were confirmed by histology. PHT induced RV hypertrophy and function enhancement. In the H group, RV shortening fraction (RVSF; 71 ± 12% vs. 41 ± 2%) and RV end-systolic pressure (RVESP; 54 ± 6 vs. 19 ± 2 mmHg) were increased compared with controls. Moreover, myocardial perfusion was increased in the RV (36 ± 2% vs. 22 ± 2%) and decreased in the LV (64 ± 3% vs. 78 ± 2%). In the H+CO group, RVSF (45 ± 3% vs. 71 ± 12%) and RVESP (38 ± 3 vs. 54 ± 6 mmHg) were decreased compared with the H group. RV perfusion was decreased in the H+CO group compared with the H group (21 ± 5% vs. 36 ± 2%), and LV perfusion was increased (79 ± 5% vs. 64 ± 3%). PHT and RV hypertrophy were still present in the H+CO group, and fibroses localized in the RV were detected. Similar lesions were observed in an additional group exposed simultaneously to hypoxia and 50 ppm CO over 3 wk. We demonstrated that rats with established PHT were more sensitive to CO, which dramatically alters the RV adaptive response to PHT, leading to ischemic lesions. right ventricle remodeling; right ventricle perfusion Address for reprint requests and other correspondence: V. Eder, Labpart EA 3852, Fac. of Medicine, Univ. 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Antier, Daniel ; Bonnet, Pierre ; Net, Jean-Loic Le ; Hanton, Gilles ; Eder, Veronique</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c456t-ccd19535a4dcccb204a2d2e68cf4564d5af94030055237a5fbc182bfbbfe774d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>Administration, Inhalation</topic><topic>Animals</topic><topic>Blood Flow Velocity - drug effects</topic><topic>Blood Pressure - drug effects</topic><topic>Carbon monoxide</topic><topic>Carbon Monoxide - administration &amp; dosage</topic><topic>Carbon Monoxide - toxicity</topic><topic>Carboxyhemoglobin - metabolism</topic><topic>Cardiac Catheterization</topic><topic>Cardiovascular system</topic><topic>Comparative analysis</topic><topic>Coronary Circulation - drug effects</topic><topic>Disease Models, Animal</topic><topic>Echocardiography</topic><topic>Fibrosis</topic><topic>Heart Ventricles - drug effects</topic><topic>Heart Ventricles - physiopathology</topic><topic>Hematocrit</topic><topic>Hypertension</topic><topic>Hypertension, Pulmonary - blood</topic><topic>Hypertension, Pulmonary - complications</topic><topic>Hypertension, Pulmonary - etiology</topic><topic>Hypertension, Pulmonary - physiopathology</topic><topic>Hypertrophy, Right Ventricular - blood</topic><topic>Hypertrophy, Right Ventricular - etiology</topic><topic>Hypertrophy, Right Ventricular - physiopathology</topic><topic>Hypoxia</topic><topic>Hypoxia - blood</topic><topic>Hypoxia - complications</topic><topic>Hypoxia - physiopathology</topic><topic>Laser-Doppler Flowmetry</topic><topic>Life Sciences</topic><topic>Male</topic><topic>Myocardial Contraction - drug effects</topic><topic>Myocardial Ischemia - chemically induced</topic><topic>Myocardial Ischemia - complications</topic><topic>Myocardial Ischemia - pathology</topic><topic>Myocardial Ischemia - physiopathology</topic><topic>Pulmonary Artery - drug effects</topic><topic>Pulmonary Artery - physiopathology</topic><topic>Rats</topic><topic>Rats, Wistar</topic><topic>Rodents</topic><topic>Toxicity</topic><topic>Ventricular Function, Left - drug effects</topic><topic>Ventricular Function, Right - drug effects</topic><topic>Ventricular Pressure - drug effects</topic><topic>Ventricular Remodeling - drug effects</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Gautier, Mathieu</creatorcontrib><creatorcontrib>Antier, Daniel</creatorcontrib><creatorcontrib>Bonnet, Pierre</creatorcontrib><creatorcontrib>Net, Jean-Loic Le</creatorcontrib><creatorcontrib>Hanton, Gilles</creatorcontrib><creatorcontrib>Eder, Veronique</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Calcium &amp; 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Heart and circulatory physiology</jtitle><addtitle>Am J Physiol Heart Circ Physiol</addtitle><date>2007-08-01</date><risdate>2007</risdate><volume>293</volume><issue>2</issue><spage>H1046</spage><epage>H1052</epage><pages>H1046-H1052</pages><issn>0363-6135</issn><eissn>1522-1539</eissn><coden>AJPPDI</coden><abstract>1 University Francois Rabelais of Tours, IFR 135, Labpart EA 3852, Tours Cedex; and 2 Pfizer Global Research and Development, Centre de Recherche, Amboise Cedex, France Submitted 22 September 2006 ; accepted in final form 3 May 2007 We aimed to investigate the toxicity of carbon monoxide (CO) in rats with right ventricle (RV) remodeling induced by hypoxic pulmonary hypertension (PHT). A group of Wistar rats was exposed to 3-wk hypobaric hypoxia (H). A second group was exposed to 50 ppm CO for 1 wk (CO). A third group was exposed to chronic hypoxia including 50 ppm CO during the third week (H+CO). These groups were compared with controls. RV and left ventricle (LV) functions were assessed by echocardiography and transparietal catheterization. Ventricular perfusion was estimated with the fluorescent microsphere method. Results were confirmed by histology. PHT induced RV hypertrophy and function enhancement. In the H group, RV shortening fraction (RVSF; 71 ± 12% vs. 41 ± 2%) and RV end-systolic pressure (RVESP; 54 ± 6 vs. 19 ± 2 mmHg) were increased compared with controls. Moreover, myocardial perfusion was increased in the RV (36 ± 2% vs. 22 ± 2%) and decreased in the LV (64 ± 3% vs. 78 ± 2%). In the H+CO group, RVSF (45 ± 3% vs. 71 ± 12%) and RVESP (38 ± 3 vs. 54 ± 6 mmHg) were decreased compared with the H group. RV perfusion was decreased in the H+CO group compared with the H group (21 ± 5% vs. 36 ± 2%), and LV perfusion was increased (79 ± 5% vs. 64 ± 3%). PHT and RV hypertrophy were still present in the H+CO group, and fibroses localized in the RV were detected. Similar lesions were observed in an additional group exposed simultaneously to hypoxia and 50 ppm CO over 3 wk. We demonstrated that rats with established PHT were more sensitive to CO, which dramatically alters the RV adaptive response to PHT, leading to ischemic lesions. right ventricle remodeling; right ventricle perfusion Address for reprint requests and other correspondence: V. Eder, Labpart EA 3852, Fac. of Medicine, Univ. Francois Rabelais, 10 Bld Tonnelle, BP 3223, 37032 Tours Cedex 1, France (e-mail: eder{at}med.univ-tours.fr )</abstract><cop>United States</cop><pub>American Physiological Society</pub><pmid>17483237</pmid><doi>10.1152/ajpheart.01040.2006</doi><orcidid>https://orcid.org/0000-0001-8971-5683</orcidid></addata></record>
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ispartof American journal of physiology. Heart and circulatory physiology, 2007-08, Vol.293 (2), p.H1046-H1052
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source MEDLINE; American Physiological Society; EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection
subjects Administration, Inhalation
Animals
Blood Flow Velocity - drug effects
Blood Pressure - drug effects
Carbon monoxide
Carbon Monoxide - administration & dosage
Carbon Monoxide - toxicity
Carboxyhemoglobin - metabolism
Cardiac Catheterization
Cardiovascular system
Comparative analysis
Coronary Circulation - drug effects
Disease Models, Animal
Echocardiography
Fibrosis
Heart Ventricles - drug effects
Heart Ventricles - physiopathology
Hematocrit
Hypertension
Hypertension, Pulmonary - blood
Hypertension, Pulmonary - complications
Hypertension, Pulmonary - etiology
Hypertension, Pulmonary - physiopathology
Hypertrophy, Right Ventricular - blood
Hypertrophy, Right Ventricular - etiology
Hypertrophy, Right Ventricular - physiopathology
Hypoxia
Hypoxia - blood
Hypoxia - complications
Hypoxia - physiopathology
Laser-Doppler Flowmetry
Life Sciences
Male
Myocardial Contraction - drug effects
Myocardial Ischemia - chemically induced
Myocardial Ischemia - complications
Myocardial Ischemia - pathology
Myocardial Ischemia - physiopathology
Pulmonary Artery - drug effects
Pulmonary Artery - physiopathology
Rats
Rats, Wistar
Rodents
Toxicity
Ventricular Function, Left - drug effects
Ventricular Function, Right - drug effects
Ventricular Pressure - drug effects
Ventricular Remodeling - drug effects
title Continuous inhalation of carbon monoxide induces right ventricle ischemia and dysfunction in rats with hypoxic pulmonary hypertension
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