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Moughaizel M, Dagher E, Jablaoui A, Thorin C, Rhimi M, Desfontis JC, Mallem Y. Long-term high-fructose high-fat diet feeding elicits insulin resistance, exacerbates dyslipidemia and induces gut microbiota dysbiosis in WHHL rabbits. PLoS One 2022; 17:e0264215. [PMID: 35196347 PMCID: PMC8865649 DOI: 10.1371/journal.pone.0264215] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 02/04/2022] [Indexed: 01/12/2023] Open
Abstract
The metabolic syndrome (MetS) has become a global public health burden due to its link to cardiovascular disease and diabetes mellitus. The present study was designed to characterize the metabolic and cardiovascular disturbances, as well as changes in gut microbiota associated with high-fructose high-fat diet (HFFD)-induced MetS in Watanabe heritable hyperlipidemic (WHHL) rabbits. Twenty-one Watanabe rabbits were assigned to a control (n = 9) and HFFD (n = 12) groups, receiving a chow diet and a HFFD, respectively. During a 12-weeks protocol, morphological parameters were monitored; plasma fasting levels of lipids, glucose and insulin were measured and a glucose tolerance test (GTT) was performed. HOMA-IR was calculated. Cardiac function and vascular reactivity were evaluated using the Langendorff isolated heart and isolated carotid arteries methods, respectively. 16S rRNA sequencing of stool samples was used to determine gut microbial composition and abundance. HFFD-fed Watanabe rabbits exhibited increased fasting insulin (p < 0.03, 12th week vs. Baseline), HOMA-IR (p < 0.03 vs. Control), area under the curve of the GTT (p < 0.02 vs. Control), triglycerides (p < 0.05, 12th week vs. Baseline), TC (p < 0.01 vs. Control), LDL-C (p < 0.001 vs. Control). The HFFD group also displayed a significant decrease in intestinal microbial richness, evenness and diversity (FDR < 0.001, FDR < 0.0001, FDR < 0.01, respectively vs. Control group) and an increase in its Firmicutes/Bacteroidetes ratio (R = 3.39 in control vs. R = 28.24 in the HFFD group) indicating a shift in intestinal microbial composition and diversity. Our results suggest that HFFD induces insulin resistance and gut microbiota dysbiosis and accentuates dyslipidemia; and that, when subjected to HFFD, Watanabe rabbits might become a potential diet-induced MetS animal models with two main features, dyslipidemia and insulin resistance.
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Affiliation(s)
- Michelle Moughaizel
- Nutrition, PathoPhysiology and Pharmacology (NP3) Unit, Oniris, Nantes Atlantic College of Veterinary Medicine, Food Science and Engineering, Nantes, France
- * E-mail: (MM); (YM)
| | - Elie Dagher
- Laboniris, Oniris, Nantes Atlantic College of Veterinary Medicine, Food Science and Engineering, Nantes, France
| | - Amin Jablaoui
- Institut Micalis, INRAE, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Chantal Thorin
- Nutrition, PathoPhysiology and Pharmacology (NP3) Unit, Oniris, Nantes Atlantic College of Veterinary Medicine, Food Science and Engineering, Nantes, France
| | - Moez Rhimi
- Institut Micalis, INRAE, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Jean-Claude Desfontis
- Nutrition, PathoPhysiology and Pharmacology (NP3) Unit, Oniris, Nantes Atlantic College of Veterinary Medicine, Food Science and Engineering, Nantes, France
| | - Yassine Mallem
- Nutrition, PathoPhysiology and Pharmacology (NP3) Unit, Oniris, Nantes Atlantic College of Veterinary Medicine, Food Science and Engineering, Nantes, France
- * E-mail: (MM); (YM)
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Doghri Y, Dubreil L, Lalanne V, Hélissen O, Fleurisson R, Thorin C, Desfontis JC, Mallem MY. Soluble guanylate cyclase chronic stimulation effects on cardiovascular reactivity in cafeteria diet-induced rat model of metabolic syndrome. Eur J Pharmacol 2021; 899:173978. [PMID: 33691164 DOI: 10.1016/j.ejphar.2021.173978] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 02/05/2021] [Accepted: 02/19/2021] [Indexed: 11/19/2022]
Abstract
Metabolic syndrome is linked to an increased risk of cardiovascular complications by a mechanism involving mainly decreased nitric oxide (NO) bioavailability and impaired NO-soluble guanylate cyclase (sGC)- cyclic guanosine monophosphate (cGMP) signalling (NO-sGC-cGMP). To further develop this scientific point, this study aimed to investigate the effects of long-term treatment with BAY 41-2272 (a sGC stimulator) on cardiovascular reactivity of spontaneously hypertensive rats (SHR) as a model of metabolic syndrome. SHR were randomly divided into 3 groups: control group, cafeteria diet (CD)-fed group and CD-fed group treated daily with BAY 41-2272 (5 mg/kg) by gastric gavage for 12 weeks. In vivo measurements of body weight, abdominal circumference, blood pressure and glucose tolerance test were performed. At the end of the feeding period, ex vivo cumulative concentration-response curves were performed on isolated perfused heart (isoproterenol (0.1 nM - 1 μM)) and thoracic aorta (phenylephrine (1 nM-10 μM), acetylcholine (1 nM-10 μM), and sodium nitroprusside (SNP) (0.1 nM-0.1 μM)). We showed that chronic CD feeding induced abdominal obesity, hypertriglyceridemia, glucose intolerance and exacerbated arterial hypertension in SHR. Compared to control group, CD-fed group showed a decrease in β-adrenoceptor-induced cardiac inotropy, in coronary perfusion pressure and in aortic contraction to phenylephrine. While relaxing effects of acetylcholine and SNP were unchanged. BAY 41-2272 long-term treatment markedly prevented arterial hypertension development and glucose intolerance, enhanced the α1-adrenoceptor-induced vasoconstriction, and restored cardiac inotropy and coronary vasodilation. These findings suggest that BAY 41-2272 may be a potential novel drug for preventing metabolic and cardiovascular complications of metabolic syndrome.
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MESH Headings
- Animals
- Aorta, Thoracic/drug effects
- Aorta, Thoracic/enzymology
- Aorta, Thoracic/physiopathology
- Cardiovascular Diseases/enzymology
- Cardiovascular Diseases/etiology
- Cardiovascular Diseases/physiopathology
- Cardiovascular Diseases/prevention & control
- Coronary Circulation/drug effects
- Cyclic GMP/metabolism
- Disease Models, Animal
- Enzyme Activation
- Enzyme Activators/pharmacology
- Glucose Intolerance/enzymology
- Glucose Intolerance/etiology
- Glucose Intolerance/physiopathology
- Glucose Intolerance/prevention & control
- Hypertension/enzymology
- Hypertension/etiology
- Hypertension/physiopathology
- Hypertension/prevention & control
- Hypertriglyceridemia/enzymology
- Hypertriglyceridemia/etiology
- Hypertriglyceridemia/physiopathology
- Hypertriglyceridemia/prevention & control
- Isolated Heart Preparation
- Male
- Metabolic Syndrome/enzymology
- Metabolic Syndrome/etiology
- Metabolic Syndrome/physiopathology
- Metabolic Syndrome/prevention & control
- Nitric Oxide Synthase Type II/metabolism
- Obesity, Abdominal/enzymology
- Obesity, Abdominal/etiology
- Obesity, Abdominal/physiopathology
- Obesity, Abdominal/prevention & control
- Pyrazoles/pharmacology
- Pyridines/pharmacology
- Rats, Inbred SHR
- Soluble Guanylyl Cyclase/metabolism
- Vasoconstriction/drug effects
- Vasodilation/drug effects
- Ventricular Function, Left/drug effects
- Ventricular Pressure/drug effects
- Rats
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Affiliation(s)
- Yosra Doghri
- UPSP NP3 (2017.B146), Nutrition, Pathophysiology and Pharmacology, Oniris, Nantes-Atlantic College of Veterinary Medicine Food Sciences and Engineering, 44307, Nantes Cedex 03, France
| | - Laurence Dubreil
- UMR PAnTher 703 INRA/Oniris Animal Pathophysiology and Bio Therapy for Muscle and Nervous System Diseases, Oniris, Nantes-Atlantic College of Veterinary Medicine Food Sciences and Engineering, 44307, Nantes Cedex 03, France
| | - Valérie Lalanne
- UPSP NP3 (2017.B146), Nutrition, Pathophysiology and Pharmacology, Oniris, Nantes-Atlantic College of Veterinary Medicine Food Sciences and Engineering, 44307, Nantes Cedex 03, France
| | - Ophélie Hélissen
- UPSP NP3 (2017.B146), Nutrition, Pathophysiology and Pharmacology, Oniris, Nantes-Atlantic College of Veterinary Medicine Food Sciences and Engineering, 44307, Nantes Cedex 03, France
| | - Romain Fleurisson
- UMR PAnTher 703 INRA/Oniris Animal Pathophysiology and Bio Therapy for Muscle and Nervous System Diseases, Oniris, Nantes-Atlantic College of Veterinary Medicine Food Sciences and Engineering, 44307, Nantes Cedex 03, France
| | - Chantal Thorin
- UPSP NP3 (2017.B146), Nutrition, Pathophysiology and Pharmacology, Oniris, Nantes-Atlantic College of Veterinary Medicine Food Sciences and Engineering, 44307, Nantes Cedex 03, France
| | - Jean-Claude Desfontis
- UPSP NP3 (2017.B146), Nutrition, Pathophysiology and Pharmacology, Oniris, Nantes-Atlantic College of Veterinary Medicine Food Sciences and Engineering, 44307, Nantes Cedex 03, France
| | - M Yassine Mallem
- UPSP NP3 (2017.B146), Nutrition, Pathophysiology and Pharmacology, Oniris, Nantes-Atlantic College of Veterinary Medicine Food Sciences and Engineering, 44307, Nantes Cedex 03, France.
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Doghri Y, Chetaneau F, Rhimi M, Kriaa A, Lalanne V, Thorin C, Maguin E, Mallem MY, Desfontis JC. Sildenafil citrate long-term treatment effects on cardiovascular reactivity in a SHR experimental model of metabolic syndrome. PLoS One 2019; 14:e0223914. [PMID: 31697707 PMCID: PMC6837760 DOI: 10.1371/journal.pone.0223914] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 10/01/2019] [Indexed: 12/26/2022] Open
Abstract
Much evidence indicates that metabolic syndrome is strongly correlated with a decrease in nitric oxide and an increase in oxidative stress leading to cardiovascular alterations. In recent years, gut microbiota has emerged as a new contributor to the metabolic syndrome establishment and associated cardiovascular diseases, but the underlying mechanisms remain unclear. We hypothesized that a positive modulation of cyclic guanosine monophosphate (cGMP) pathway, through phosphodiesterase type 5 (PDE5) inhibition could prevent cardiovascular alterations and gut dysbiosis that may be associated to metabolic syndrome. Spontaneously hypertensive rats (SHR) were randomly divided into 4 groups: control, cafeteria diet (CD) and sildenafil citrate treated groups (5mg/kg per os) were given either a CD or a standard chow diet for 10 weeks. Body weight, arterial blood pressure and glucose tolerance test were monitored. At the 10th week, cardiac inotropy and coronary perfusion pressure were evaluated on isolated heart according to Langendorff method. Cumulative concentration response curves to phenylephrine and acetylcholine were determined on thoracic aorta rings for vascular reactivity evaluation. Faecal samples were collected for the gut microbiota analysis. Compared to the control group, CD-fed rats showed a significant increase in body weight gain, arterial blood pressure and were glucose intolerant. This group showed also a decrease in β-adrenoceptor-induced cardiac inotropy and coronary vasodilation. Gut microbiota analysis revealed a significant reduction in the abundance of Lactobocillus spp in cafeteria diet-fed rats when compared to the control ones. Sildenafil citrate long-term treatment decreased weight gain and arterial blood pressure, improved coronary vasodilation and reduced α1-adrenoceptor-induced vasoconstriction in CD group. However, it did not reverse gut dysbiosis induced by chronic CD feeding. These results suggest that cGMP pathway targeting may be a potential therapeutic strategy for the management of the metabolic syndrome and associated cardiovascular disorders.
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Affiliation(s)
- Yosra Doghri
- UPSP NP3 (2017.B146), Nutrition, Pathophysiology and Pharmacology, Oniris, College of Veterinary Medicine, Food Sciences and Engineering, Atlanpôle—La Chantrerie, Route de Gachet, 5 BP, Nantes, France
- * E-mail:
| | - Fabien Chetaneau
- UPSP NP3 (2017.B146), Nutrition, Pathophysiology and Pharmacology, Oniris, College of Veterinary Medicine, Food Sciences and Engineering, Atlanpôle—La Chantrerie, Route de Gachet, 5 BP, Nantes, France
| | - Moez Rhimi
- UMR 1319 Micalis, INRA, Microbiota Interaction with Human and Animal Team (MIHA), AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Aicha Kriaa
- UMR 1319 Micalis, INRA, Microbiota Interaction with Human and Animal Team (MIHA), AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Valérie Lalanne
- UPSP NP3 (2017.B146), Nutrition, Pathophysiology and Pharmacology, Oniris, College of Veterinary Medicine, Food Sciences and Engineering, Atlanpôle—La Chantrerie, Route de Gachet, 5 BP, Nantes, France
| | - Chantal Thorin
- UPSP NP3 (2017.B146), Nutrition, Pathophysiology and Pharmacology, Oniris, College of Veterinary Medicine, Food Sciences and Engineering, Atlanpôle—La Chantrerie, Route de Gachet, 5 BP, Nantes, France
| | - Emmanuelle Maguin
- UMR 1319 Micalis, INRA, Microbiota Interaction with Human and Animal Team (MIHA), AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - M. Yassine Mallem
- UPSP NP3 (2017.B146), Nutrition, Pathophysiology and Pharmacology, Oniris, College of Veterinary Medicine, Food Sciences and Engineering, Atlanpôle—La Chantrerie, Route de Gachet, 5 BP, Nantes, France
| | - Jean-Claude Desfontis
- UPSP NP3 (2017.B146), Nutrition, Pathophysiology and Pharmacology, Oniris, College of Veterinary Medicine, Food Sciences and Engineering, Atlanpôle—La Chantrerie, Route de Gachet, 5 BP, Nantes, France
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Tissier F, Farhat F, Philouze C, Desfontis JC, Didier R, Gilard M, Mallem MY, Mansourati J, Moisan C, Pichavant-Rafini K, Theron M, Amérand A. Long-term atorvastatin treatment decreases heart maximal oxygen consumption and its vulnerability to in vitro oxidative stress in Watanabe heritable hyperlipidemic rabbit. Can J Physiol Pharmacol 2018; 96:1112-1118. [PMID: 30011375 DOI: 10.1139/cjpp-2018-0085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Statins are currently used in prevention of cardiovascular diseases in high-risk populations, and could be considered in primary prevention. However, few studies are available on the long-term effects of low doses of statins, especially on mitochondrial function and reactive oxygen species (ROS) metabolism at cardiac level. This study aimed to determine potential effects of a long-term atorvastatin treatment, at low-dose concentration, on the myocardium mitochondrial respiration. Thirty-four Watanabe rabbits were treated or not with atorvastatin (2.5 mg·kg-1·day-1) from the age of 3 to 12 months. Every 3 months, proton leak, basal (V0), and maximal (Vmax) mitochondrial respiration on cardiac permeabilized fibers were measured. Additionally, the vulnerability to ROS, cardiac enzymatic antioxidant defenses, and oxidative damage (lipoperoxidation) were analyzed. Proton leak increased over the duration of the experiment (up to 60% from Vmax at 12 months). Moreover, the statin treatment induced a decrease of Vmax and a decrease of ROS susceptibility of cardiac mitochondria. However, the lipoperoxidation and the antioxidant defenses were not dependent on the presence of statin treatment, or on its duration. This is the first study showing a protective effect of long-term statins treatment against the ROS susceptibility in the cardiac muscle.
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Affiliation(s)
- Florine Tissier
- a EA 4324 ORPHY, Université de Bretagne Occidentale, IBSAM, Brest, France
| | - Firas Farhat
- a EA 4324 ORPHY, Université de Bretagne Occidentale, IBSAM, Brest, France
| | - Clothilde Philouze
- a EA 4324 ORPHY, Université de Bretagne Occidentale, IBSAM, Brest, France
| | - Jean-Claude Desfontis
- b LUNAM Université, UPSP 5304 de physiopathologie animale et pharmacologie fonctionnelle, Oniris, Nantes, France
| | - Romain Didier
- a EA 4324 ORPHY, Université de Bretagne Occidentale, IBSAM, Brest, France.,c Département de cardiologie, CHRU, Brest, France
| | - Martine Gilard
- a EA 4324 ORPHY, Université de Bretagne Occidentale, IBSAM, Brest, France.,c Département de cardiologie, CHRU, Brest, France
| | - M Yassine Mallem
- b LUNAM Université, UPSP 5304 de physiopathologie animale et pharmacologie fonctionnelle, Oniris, Nantes, France
| | - Jacques Mansourati
- a EA 4324 ORPHY, Université de Bretagne Occidentale, IBSAM, Brest, France.,c Département de cardiologie, CHRU, Brest, France
| | - Christine Moisan
- a EA 4324 ORPHY, Université de Bretagne Occidentale, IBSAM, Brest, France
| | | | - Michael Theron
- a EA 4324 ORPHY, Université de Bretagne Occidentale, IBSAM, Brest, France
| | - Aline Amérand
- a EA 4324 ORPHY, Université de Bretagne Occidentale, IBSAM, Brest, France
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Altoama K, Mallem MY, Thorin C, Betti E, Desfontis JC. Effect of nebivolol treatment during pregnancy on the intrauterine fetal growth, mortality and pup postnatal development in the l-NAME-induced hypertensive rats. Eur J Pharmacol 2016; 791:465-472. [DOI: 10.1016/j.ejphar.2016.09.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 09/14/2016] [Accepted: 09/19/2016] [Indexed: 01/14/2023]
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Bruet V, Dumon H, Bourdeau P, Desfontis JC, Martin L. Prospective pilot study to detect dogs with non food-induced canine atopic dermatitis using Fourier transform infrared spectroscopy. Vet Dermatol 2016; 27:356-e89. [PMID: 27500559 DOI: 10.1111/vde.12365] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/16/2016] [Indexed: 11/28/2022]
Abstract
BACKGROUND The diagnosis of canine atopic dermatitis (CAD) remains challenging due to the lack of a simple biomarker or metabolic profile. In human medicine, Fourier transform infrared spectroscopy (FTIR) is an analytical technique used for several diseases. It requires a small amount of sample and allows the identification of structural moieties of biomolecules on the basis of their infrared absorption, with limited sample pretreatment. HYPOTHESIS/OBJECTIVES The aim of the study was to evaluate the diagnostic value of FTIR. ANIMALS Three groups were tested: 21 dogs with non food-induced CAD (NFICAD), 16 dogs with inflammatory conditions of various origins but without allergic dermatoses (OD) and 10 healthy dogs (H). METHODS Peripheral blood was collected and spectra were acquired with a FTIR spectrophotometer. A principal component analysis (PCA) was performed on the full wavenumber spectra (4000-600/cm), followed by a Fisher discriminant analysis (DA) to assess the differences between the three groups. RESULTS The PCA followed by the DA of whole spectra showed significant differences between the three groups. These results suggest that by using the FTIR method, dogs with NFICAD can be differentiated from healthy dogs and dogs with nonallergic inflammation. There was no overlap between the spectral data of the three groups indicating that NFICAD dogs were correctly segregated from the H and OD groups. CONCLUSIONS A study on a larger cohort including common pruritic skin diseases is necessary to confirm these initial results and the relevance of this diagnostic technique.
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Affiliation(s)
- Vincent Bruet
- Dermatology, Parasitology CE, Mycology Unit, LUNAM, Oniris, Atlanpole, CS 40706, Nantes, F-44307, France. .,UPSP 5304, Animal pathophysiology and functional pharmacology, LUNAM, Oniris, Atlanpole, CS 40706, Nantes, F-44307, France.
| | - Henri Dumon
- Nutrition and Endocrinology Unit, LUNAM, Oniris, Atlanpole, CS 40706, Nantes, F-44307, France
| | - Patrick Bourdeau
- Dermatology, Parasitology CE, Mycology Unit, LUNAM, Oniris, Atlanpole, CS 40706, Nantes, F-44307, France.,UPSP 5304, Animal pathophysiology and functional pharmacology, LUNAM, Oniris, Atlanpole, CS 40706, Nantes, F-44307, France
| | - Jean-Claude Desfontis
- UPSP 5304, Animal pathophysiology and functional pharmacology, LUNAM, Oniris, Atlanpole, CS 40706, Nantes, F-44307, France
| | - Lucile Martin
- Nutrition and Endocrinology Unit, LUNAM, Oniris, Atlanpole, CS 40706, Nantes, F-44307, France
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Tissier F, Mallem Y, Goanvec C, Didier R, Aubry T, Bourgeois N, Desfontis JC, Dubreuil M, Le Grand Y, Mansourati J, Pichavant-Rafini K, Plee-Gautier E, Roquefort P, Theron M, Gilard M. A non-hypocholesterolemic atorvastatin treatment improves vessel elasticity by acting on elastin composition in WHHL rabbits. Atherosclerosis 2016; 251:70-77. [PMID: 27266824 DOI: 10.1016/j.atherosclerosis.2016.05.039] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 05/13/2016] [Accepted: 05/25/2016] [Indexed: 12/28/2022]
Abstract
BACKGROUND AND AIMS Statins are prescribed for their preventative effects within atherosclerosis development. To our knowledge, no study focusing on very low-dose (non-hypolipidemic effect) and long-term atorvastatin treatment in vivo was available. Our aim was to assess the effect of such atorvastatin treatment on the mechanical and functional characteristics of arteries in the context of primary prevention. METHODS An atorvastatin treatment (2.5 mg/kg/day) was tested against controls on 34 male 3 to 12 month-old WHHL rabbits. No effect on total cholesterol, triglycerides, HDL or LDL was observed. The arterial stiffness was evaluated on vigil animals by pulse wave velocity (PWV) measurement. Then, in vitro measurements were made to evaluate (1) the endothelial and vascular smooth muscle function, (2) the elasticity of the arterial wall and (3) the composition in collagen and elastin in the aorta. RESULTS The PWV increasing observed with age in control group was canceled by treatment, creating a significance difference between groups at 12 months (5.17 ± 0.50 vs 2.14 ± 0.34 m s(-1) in control and treated groups respectively). Vasoreactivity modifications can't explain this result but maintain of elasticity with treatment in large arteries was confirm by a static tensile test. A first possible explanation is the change of wall composition with treatment, validated by the percentage of elastin at 12 months, 4.4% lower in the control group compared to the treated group (p < 0.05). CONCLUSIONS This study shows that a non-hypocholesterolemic statin treatment could improve vessel elasticity in the atherosclerotic WHHL model. The great novelty of this work is the vessel wall composition changing associated. This first approach in animal opens the reflection on the use of these low doses in humans. This could be interesting in the context of arterial stiffening with aging, non-hyperlipidemic atherosclerosis or with cholesterol reduce by another therapy or lifestyle modification.
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Affiliation(s)
- Florine Tissier
- EA 4324 ORPHY, UBO, UFR Sciences et Techniques, 6 Avenue Victor Le Gorgeu CS 93837, 29238 Brest Cedex 3, France.
| | - Yassine Mallem
- Université LUNAM, Oniris, UPSP 5304 de Pathophysiologie animale et de Pharmacologie fonctionnelle, Nantes, France
| | - Christelle Goanvec
- EA 4324 ORPHY, UBO, UFR Sciences et Techniques, 6 Avenue Victor Le Gorgeu CS 93837, 29238 Brest Cedex 3, France
| | - Romain Didier
- EA 4324 ORPHY, UBO, UFR Sciences et Techniques, 6 Avenue Victor Le Gorgeu CS 93837, 29238 Brest Cedex 3, France; Département de Cardiologie, CHRU Brest, Brest, France
| | - Thierry Aubry
- LIMATB, Equipe Rhéologie, EA4250 UFR Sciences et Techniques, 6 Avenue Victor Le Gorgeu CS 93837, 29238 Brest Cedex 3, France
| | - Nathalie Bourgeois
- Université LUNAM, Oniris, UPSP 5304 de Pathophysiologie animale et de Pharmacologie fonctionnelle, Nantes, France
| | - Jean-Claude Desfontis
- Université LUNAM, Oniris, UPSP 5304 de Pathophysiologie animale et de Pharmacologie fonctionnelle, Nantes, France
| | - Matthieu Dubreuil
- EA 938 LSOL, UBO, UFR Sciences et Techniques, 6 Avenue Victor Le Gorgeu CS 93837, 29238 Brest Cedex 3, France
| | - Yann Le Grand
- EA 938 LSOL, UBO, UFR Sciences et Techniques, 6 Avenue Victor Le Gorgeu CS 93837, 29238 Brest Cedex 3, France
| | - Jacques Mansourati
- EA 4324 ORPHY, UBO, UFR Sciences et Techniques, 6 Avenue Victor Le Gorgeu CS 93837, 29238 Brest Cedex 3, France; Département de Cardiologie, CHRU Brest, Brest, France
| | - Karine Pichavant-Rafini
- EA 4324 ORPHY, UBO, UFR Sciences et Techniques, 6 Avenue Victor Le Gorgeu CS 93837, 29238 Brest Cedex 3, France
| | | | - Philippe Roquefort
- LIMATB, Equipe Rhéologie, EA4250 UFR Sciences et Techniques, 6 Avenue Victor Le Gorgeu CS 93837, 29238 Brest Cedex 3, France
| | - Michael Theron
- EA 4324 ORPHY, UBO, UFR Sciences et Techniques, 6 Avenue Victor Le Gorgeu CS 93837, 29238 Brest Cedex 3, France
| | - Martine Gilard
- EA 4324 ORPHY, UBO, UFR Sciences et Techniques, 6 Avenue Victor Le Gorgeu CS 93837, 29238 Brest Cedex 3, France; Département de Cardiologie, CHRU Brest, Brest, France
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Philouze C, Lalanne V, Jossier R, Desfontis JC, Mallem Y. 0263 : Effects of anti- -adrenoceptors autoantibodies from dogs suffering from degenerative mitral valve disease on cardiovascular response to-adrenoceptors agonists in rats: preliminary results. Archives of Cardiovascular Diseases Supplements 2016. [DOI: 10.1016/s1878-6480(16)30515-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Tissier F, Mallem Y, Goanvec C, Didier R, Aubry T, Bourgois N, Desfontis JC, Dubreuil M, Legrand Y, Mansourati J, Pichavant-Rafini K, Plee-Gautier E, Roquefort P, Theron M, Gilard M. 0300 : Mechanical and functional vascular impact of a low dose atorvastatin treatment in WHHL rabbits. Archives of Cardiovascular Diseases Supplements 2016. [DOI: 10.1016/s1878-6480(16)30393-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kanso H, Mallem MY, Thorin C, Rabesona H, Haertle T, Chobert JM, Desfontis JC. Vasorelaxant effects of camel and bovine casein tryptic hydrolysates in rat thoracic aorta and their antihypertensive effect in awake spontaneously hypertensive rats. Int Dairy J 2016. [DOI: 10.1016/j.idairyj.2015.11.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Altoama K, Yassine Mallem M, Thorin C, Betti E, Desfontis JC. Effect of nebivolol treatment during pregnancy on the genital circulation, fetal growth and postnatal development in the Wistar rat. Eur J Pharmacol 2015; 758:31-9. [DOI: 10.1016/j.ejphar.2015.04.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Revised: 03/27/2015] [Accepted: 04/01/2015] [Indexed: 12/14/2022]
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12
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Accary C, Hraoui-Bloquet S, Hamze M, Mallem Y, El Omar F, Sabatier JM, Desfontis JC, Fajloun Z. Protein content analysis and antimicrobial activity of the crude venom of Montivipera bornmuelleri; a viper from Lebanon. Infect Disord Drug Targets 2015; 14:49-55. [PMID: 24853875 DOI: 10.2174/1871526514666140522114754] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 06/17/2014] [Accepted: 06/18/2014] [Indexed: 11/22/2022]
Abstract
Viperidae snakes venoms represent a source of efficient bioactive components that have already led to the development of several new drugs. In this work, we analyzed the protein content of the Montivipera bornmuelleri crude venom using LC-ESI-MS, sephadex G-75 gel filtration and SDS-PAGE and demonstrated the presence of proteins with molecular masses corresponding to metalloprotease III, serine-protease and PLA2 in three fractions collected after gel filtration. Equally, we examined the antimicrobial effect of the venom that showed an important potency, as bactericidal agent, based on MBC and MIC values obtained, against Staphylococcus aureus and Morganella morganii bacteria. However, no activity was registered against Enterococcus faecalis, being the most resistant bacteria, neither against Aspergillus flavus and Penicillium digitatum fungal. Furthermore, on eleven other bacterial strains and the Candida albicans fungus, the venom has shown an intermediate efficacy by slightly reducing the growth. Our data concerning the Montivipera bornmuelleri venom give evidence of a rich and complex content aiding the exploration of new bioactive molecules for biopharmaceuticals purposes.
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Affiliation(s)
| | | | | | | | | | | | | | - Ziad Fajloun
- Azm Center for Research in Biotechnology and its Applications, Doctoral School for Sciences and Technology or Faculty of Sciences III, Lebanese University, El Mittein Street, Tripoli, Lebanon.
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13
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Bruet V, Lieubeau B, Herve J, Roussel A, Imparato L, Desfontis JC, Bourdeau P. Increased numbers of peripheral blood CD34+ cells in dogs with canine atopic dermatitis. Vet Dermatol 2014; 26:160-4, e33. [PMID: 25537867 DOI: 10.1111/vde.12191] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/24/2014] [Indexed: 12/15/2022]
Abstract
BACKGROUND The bone marrow may be involved in human atopic diseases, as shown by the release of CD34+ cells into the peripheral blood. HYPOTHESIS/OBJECTIVES The aim was to determine the numbers of CD34+ cells in atopic dogs. ANIMALS The following three groups of dogs were studied: 27 dogs with nonfood-induced atopic dermatitis (NFICAD); 16 dogs with nonallergic inflammatory diseases; and 13 healthy control dogs. METHODS Dogs with NFICAD were selected after fulfilment of Favrot's criteria and exclusion of other pruritic dermatoses, including flea infestation and adverse reaction to foods. The Canine Atopic Dermatitis Extent and Severity Index (CADESI)-03 and a Visual Analog Scale (VAS) score for pruritus were used to quantify clinical signs. A phycoerythrin-conjugated anticanine CD34 antibody was used to stain peripheral blood CD34+ cells, and these were enumerated using a flow cytometer. The CD34+ cell counts were compared between groups and tested (in the NFICAD group) for correlation with the severity of clinical signs. RESULTS The numbers of peripheral CD34+ cells in dogs with NFICAD (median 1.7) were statistically higher than in dogs with other nonallergic inflammatory diseases (median 1.0; P = 0.01) and healthy control dogs (median 0.9; P = 0.009). In dogs with NFICAD, there was no correlation between CD34+ cell numbers and CADESI-03 scores or owner-assessed pruritus (VAS score). CONCLUSIONS AND CLINICAL IMPORTANCE The results of this study suggest the possible involvement of CD34+ cells in dogs with NFICAD. The role of CD34+ cells in the aetiopathogenesis of canine atopic dermatitis remains to be determined.
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Affiliation(s)
- Vincent Bruet
- Unité Dermatologie, Parasitologie, Mycologie, LUNAM, ONIRIS - Nantes-Atlantic National College of Veterinary Medicine, Food Science and Engineering, NANTES, Loire Atlantique, France.,Unité de Pharmacologie Fonctionnelle et de Pathophysiologie Animale, LUNAM, ONIRIS - Nantes-Atlantic National College of Veterinary Medicine, Food Science and Engineering, NANTES, Loire Atlantique, France
| | - Blandine Lieubeau
- Unité d'Immuno-Endocrinologie Cellulaire et Moléculaire, LUNAM, ONIRIS - Nantes-Atlantic National College of Veterinary Medicine, Food Science and Engineering, NANTES, Loire Atlantique, France
| | - Julie Herve
- Unité d'Immuno-Endocrinologie Cellulaire et Moléculaire, LUNAM, ONIRIS - Nantes-Atlantic National College of Veterinary Medicine, Food Science and Engineering, NANTES, Loire Atlantique, France
| | - Anne Roussel
- Unité Dermatologie, Parasitologie, Mycologie, LUNAM, ONIRIS - Nantes-Atlantic National College of Veterinary Medicine, Food Science and Engineering, NANTES, Loire Atlantique, France
| | - Laëtitia Imparato
- Unité Dermatologie, Parasitologie, Mycologie, LUNAM, ONIRIS - Nantes-Atlantic National College of Veterinary Medicine, Food Science and Engineering, NANTES, Loire Atlantique, France
| | - Jean-Claude Desfontis
- Unité de Pharmacologie Fonctionnelle et de Pathophysiologie Animale, LUNAM, ONIRIS - Nantes-Atlantic National College of Veterinary Medicine, Food Science and Engineering, NANTES, Loire Atlantique, France
| | - Patrick Bourdeau
- Unité Dermatologie, Parasitologie, Mycologie, LUNAM, ONIRIS - Nantes-Atlantic National College of Veterinary Medicine, Food Science and Engineering, NANTES, Loire Atlantique, France.,Unité de Pharmacologie Fonctionnelle et de Pathophysiologie Animale, LUNAM, ONIRIS - Nantes-Atlantic National College of Veterinary Medicine, Food Science and Engineering, NANTES, Loire Atlantique, France
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Kanso H, Mallem MY, Rabesona H, Thorin C, Haertle T, Chobert JM, Guerrero F, Desfontis JC. Vasorelaxant effects of camel and bovine casein hydrolysates in rat thoracic aorta and mesenteric artery. Int Dairy J 2014. [DOI: 10.1016/j.idairyj.2014.05.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Lapo RA, Gogny M, Chatagnon G, Lalanne V, Harfoush K, Assane M, Desfontis JC, Mallem MY. Equine digital veins are more sensitive to superoxide anions than digital arteries. Eur J Pharmacol 2014; 740:66-71. [PMID: 25014758 DOI: 10.1016/j.ejphar.2014.06.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Revised: 06/16/2014] [Accepted: 06/17/2014] [Indexed: 11/24/2022]
Abstract
This work was designed to investigate (i) the effect of superoxide dismutase (SOD) inhibition on endothelial function and (ii) the free radical-induced endothelial dysfunction in equine digital veins (EDVs) and equine digital arteries (EDAs) isolated from healthy horses. EDV and EDA rings were suspended in a 5 ml organ bath containing Krebs solution. After a 60 min equilibration period, EDV and EDA rings were contracted with phenylephrine. Then, cumulative concentration-response curves (CCRCs) to acetylcholine were performed. In both EDVs and EDAs, acetylcholine (1 nM to 10 µM) produced concentration-dependent relaxation. We investigated the influence of SOD inhibition by diethyldithiocarbamate (DETC; 100 µM), a CuZnSOD inhibitor, on EDAs and EDVs relaxant responses to acetylcholine. Acetylcholine -mediated relaxation was impaired by DETC only in EDVs. SOD activity assayed by a xanthine-xanthine oxidase method was higher in EDAs compared with EDVs (P<0.05). CCRCs to acetylcholine established in the presence of pyrogallol (30 µM) or homocysteine (20 µM), two superoxide anions generating systems showed that in both EDVs and EDAs, the acetylcholine-mediated relaxation was significantly impaired by pyrogallol and homocysteine. This impairment was more pronounced in EDVs than in EDAs. Moreover, the pyrogallol-induced impairment of acetylcholine-mediated relaxation was potentiated by DETC to a greater extent in EDVs. We concluded that due to the lower activity of SOD, EDVs are more sensitive to superoxide anions than EDAs. So, any alteration of superoxide anions metabolism is likely to have a more important impact on venous rather than arterial relaxation.
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Affiliation(s)
- Rock Allister Lapo
- Ecole Inter-états des Sciences et Médecine Vétérinaires BP 5077 Dakar, Senegal
| | - Marc Gogny
- LUNAM Université, Oniris, UPSP 5304 de Physiopathologie Animale et Pharmacologie Fonctionnelle, Atlanpole La Chantrerie, BP 40706, Nantes F-44307, France
| | - Gérard Chatagnon
- LUNAM Université, Oniris, Unité de Sécurité Sanitaire des Biotechnologies de la Reproduction, Atlanpole La Chantrerie, BP 40706, Nantes, F-44307, France
| | - Valérie Lalanne
- LUNAM Université, Oniris, UPSP 5304 de Physiopathologie Animale et Pharmacologie Fonctionnelle, Atlanpole La Chantrerie, BP 40706, Nantes F-44307, France
| | - Khaled Harfoush
- LUNAM Université, Oniris, UPSP 5304 de Physiopathologie Animale et Pharmacologie Fonctionnelle, Atlanpole La Chantrerie, BP 40706, Nantes F-44307, France
| | - Moussa Assane
- Ecole Inter-états des Sciences et Médecine Vétérinaires BP 5077 Dakar, Senegal
| | - Jean-Claude Desfontis
- LUNAM Université, Oniris, UPSP 5304 de Physiopathologie Animale et Pharmacologie Fonctionnelle, Atlanpole La Chantrerie, BP 40706, Nantes F-44307, France
| | - Mohamed Yassine Mallem
- LUNAM Université, Oniris, UPSP 5304 de Physiopathologie Animale et Pharmacologie Fonctionnelle, Atlanpole La Chantrerie, BP 40706, Nantes F-44307, France.
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Altoama K, Mallem Y, Betti E, Desfontis JC. 0063: Effect of nebivolol treatment during pregnancy on the genital circulation, fetal and postnatal development in the wistar rat. Archives of Cardiovascular Diseases Supplements 2014. [DOI: 10.1016/s1878-6480(14)71409-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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17
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Kabbesh N, Gogny M, Chatagnon G, Noireaud J, Desfontis JC, Mallem MY. Vasorelaxant effect of propentofylline in isolated equine digital veins. Eur J Pharmacol 2013; 718:124-30. [PMID: 24051271 DOI: 10.1016/j.ejphar.2013.09.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Revised: 08/26/2013] [Accepted: 09/04/2013] [Indexed: 11/26/2022]
Abstract
We evaluated the vasorelaxant effect of propentofylline (PPF), a methylxanthine derivative, and its mechanism of action in equine digital veins (EDVs). Cumulative concentration-response curves to PPF (1 nM-300 µM) were recorded in phenylephrine-precontracted EDV rings under different experimental conditions. PPF-induced relaxation was partially inhibited by endothelium removal, but was unaltered by CGS-15943 (an adenosine receptor antagonist; 3 µM). PPF-induced relaxation was partially inhibited in the presence of L-NAME (a nitric oxide (NO) synthase inhibitor; 100 µM), ODQ (an inhibitor of soluble guanylyl cyclase; 30 µM) or Rp-8-Br-PET-cGMP-S (a protein kinase G inhibitor; 3 µM). It was not modified by indomethacin (a non-selective cyclooxygenase (COX) inhibitor; 10 µM), and was slightly potentiated by H-89 (a protein kinase A inhibitor; 2 µM). In endothelium-intact EDVs, PPF-induced relaxation was associated with a 2.4- and 24.1-fold increase in the tissue cGMP and cAMP content respectively. PPF (100 μM) did not shift the concentration-response curve to phenylephrine (1 nM-300 µM) but reduced the maximal effect. To investigate whether PPF can affect cAMP- and cGMP-induced relaxations, relaxation curves to forskolin (an activator of adenylate cyclase) and to sodium nitroprusside (SNP, a NO donor) were recorded in EDV rings pretreated with PPF (100 µM). PPF only slightly potentiated the forskolin-induced relaxation without affecting the SNP-induced relaxation. We demonstrated that PPF-induced relaxation in EDVs is partially endothelium-dependent. The PPF-induced relaxation partially occurred via NO release and both cAMP and cGMP generation, through COX-independent mechanisms but could also result from the inhibition of cAMP-phosphodiesterase activity for the highest concentrations.
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Affiliation(s)
- Nasr Kabbesh
- LUNAM Université Oniris, "UPSP 5304 de physiopathologie animale et de pharmacologie fonctionnelle", Atlanpole-La Chantrerie, BP 40706, Nantes F-44307, France
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Abdelkrim MA, Martignat L, Gogny M, Desfontis JC, Noireaud J, Mallem MY. Celiprolol induces β(3)-adrenoceptors-dependent relaxation in isolated porcine coronary arteries. Can J Physiol Pharmacol 2013; 91:791-6. [PMID: 24144049 DOI: 10.1139/cjpp-2013-0091] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In porcine coronary arteries (PCAs), celiprolol, a selective β(1)-adrenoceptors antagonist, induces vasodilatation by an endothelium- and nitric oxide (NO)-dependent pathway. However, the mechanisms of that vascular effect have not been precisely established. β(3)-Adrenoceptors have been shown to be involved in the relaxation per se of various vascular beds, including coronary vessels. Thus, we evaluated (i) the presence of β(3)-adrenoceptors in the PCA and (ii) their role in celiprolol-induced vasodilatation. PCA rings were placed in organ baths and preconstricted with KCl. All experiments were performed in the presence of nadolol (a β(1)/β(2)-adrenoceptor antagonist). Cumulative concentration-response curves to SR 58611A and ICI 215001 (2 β(3)-adrenoceptor agonists) and to celiprolol were constructed. We also used semiquantitative reverse transcription - polymerase chain reaction, which clearly showed the presence of β(3)-adrenoceptor transcripts. SR 58611A, ICI 215001, and celiprolol induced concentration-dependent relaxations in PCA rings. SR 58611A-induced relaxation was almost abolished after removal of endothelium or pretreatment with L-NAME (a NO synthase inhibitor). The vasorelaxations induced by SR 58611A and celiprolol were inhibited in the presence of SR 59230A and L-748337 (2 selective β(3)-adrenoceptor antagonists). We showed (i) that PCAs possess functional β(3)-adrenoceptors mediating endothelium- and NO-dependent relaxation, and (ii) that celiprolol exerts a β(3)-adrenoceptor agonistic activity in this vascular bed.
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Affiliation(s)
- Mohammed Amine Abdelkrim
- a L'Université Nantes Angers Le Mans (LUNAM) - Oniris, UPSP 5304 de physiopathologie animale et de pharmacologie fonctionnelle, Atlanpole-La Chantrerie, B.P. 40706, Nantes F-44307, France
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Bruet V, Brune J, Pastor A, Imparato L, Roussel A, Bourdeau P, Desfontis JC. Gastrointestinal hemodynamics in dogs with nonfood induced atopic dermatitis. J Vet Intern Med 2013; 27:451-5. [PMID: 23551746 DOI: 10.1111/jvim.12072] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2012] [Revised: 01/16/2013] [Accepted: 02/07/2013] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Canine atopic dermatitis can be a result of exposure to aeroallergens or trophallergens. Hemodynamic alterations occur in dogs with food hypersensitivity. HYPOTHESIS/OBJECTIVES To evaluate if hemodynamic alterations occur in dogs with NFICAD with lowered resistance to diastolic flow at fasting, after feeding, or both. ANIMALS Ten healthy dogs and 22 dogs with NFICAD were included from the hospital population. METHODS Blinded prospective study. Peak systolic velocity (PSV), end diastolic velocity (EDV), mean velocity (MV), pulsatility index (PI), resistive index (RI) and PSV/EDV ratio were measured at fasting for both arteries (cranial mesenteric artery [CMA], celiac artery [CA]) and at 40 minutes after feeding in CMA and at 60 minutes in CA. The results were analyzed statistically with a mixed model. RESULTS There was no difference detected between groups of dogs for any variable except EDV during fasting (P = .01). CONCLUSIONS AND CLINICAL IMPORTANCE There is no decrease in resistance in NFICAD to diastolic flow. This observation could be explained by the absence intestinal inflammation in NFICAD.
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Affiliation(s)
- V Bruet
- Dermatology, parasitology, mycology unit, LUNAM, Oniris, Nantes, France.
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Bruet V, Bourdeau PJ, Roussel A, Imparato L, Desfontis JC. Characterization of pruritus in canine atopic dermatitis, flea bite hypersensitivity and flea infestation and its role in diagnosis. Vet Dermatol 2012; 23:487-e93. [PMID: 23013416 DOI: 10.1111/j.1365-3164.2012.01092.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
BACKGROUND In dogs, flea infestation (FI), flea bite hypersensitivity (FBH) and canine atopic dermatitis (CAD) have been mainly characterized by their lesions but never by their pruritus. In clinical practice, many of these dogs exhibit only pruritus. HYPOTHESIS/OBJECTIVES The purpose of this study was to evaluate the characteristics of pruritus in these dermatoses and their potential usefulness for diagnosis. ANIMALS Dogs included were selected from the Oniris clinical data. Cases were selected in which the dogs had only one of the three dermatoses diagnosed. The diagnosis of CAD was based on Prélaud's criteria and positive intradermal tests except flea; for FBH by compatible clinical signs and a response to an intradermal test with flea allergen; and for FI by the presence of fleas. Moreover, in each group, other primary pruritic skin diseases were excluded. METHODS Location, behavioural manifestations, seasonality and quantification of the pruritus were evaluated. The statistical analysis used chi-squared test with a P-value <0.05. RESULTS Three hundred and forty-six dogs were analysed, 91 with CAD, 110 FI and 145 FBH. The period (season) of onset was not statistically different either for each dermatosis or among the three dermatoses. Some locations were highly specific for one dermatosis as follows: ventral abdomen/medial surface of thigh (chewing) and radius/carpus/tibia/tarsus (chewing) in FI; back/dorsolumbar area (chewing) and tail (chewing) in FBH; and paws (chewing/licking) and face/neck (rubbing) in CAD. CONCLUSIONS AND CLINICAL IMPORTANCE Some features of pruritus could be suggestive of the causal disease, with possible diagnostic value in pruritic dogs.
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Affiliation(s)
- Vincent Bruet
- LUNAM, Oniris, Dermatology, parasitology, mycology unit, Nantes, France
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Abdelkrim MA, Mallem MY, Chatagnon G, Gogny M, Desfontis JC, Noireaud J. Autoantibodies against cardiac β1-adrenoceptor do not affect the low-affinity state β1-adrenoceptor-mediated inotropy in rat cardiomyocytes. Can J Physiol Pharmacol 2012; 90:407-14. [DOI: 10.1139/y2012-006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Circulating autoantibodies directed against the 2nd extracellular loop (EL-2) of β1-adrenoceptors (β1-AABs) have been detected in the serum of patients with various cardiovascular pathologies. β1-AABs induce agonistic, positive inotropic effects via β1-adrenoceptors (β1ARs). In the mammalian heart, β1-AR can exist in 2 distinct activated configurations (the so-called high- and low-affinity states). The aim of the present study was to investigate whether the action of β1-AAB is dependent on the affinity state of β1AR in isolated ventricular cardiomyocytes of adult Wistar rats. Immunoglobulin G (IgG) containing β1-AAB obtained from animals immunized with a peptide corresponding to the EL-2 of human β1-AR, caused a dose-dependent increase in cell shortening. Isoproterenol-induced inotropy was significantly reduced in cardiomyocytes that had been preincubated with IgG containing β1-AAB and in cardiomyocytes isolated from immunized rats. The negative effects of preincubation with IgG containing β1-AAB on the response to isoproterenol was inhibited in the presence of bisoprolol. CGP 12177A and pindolol-induced inotropy was not affected by IgG preincubation or immunization. No detectable inotropic effect of cell shortening was obtained with IgG containing β1-AAB in the presence of propranolol and 3-isobutyl-1-methylxanthine. The present study demonstrates that β1-AABs have no agonist/antagonist-like effects upon low-affinity state β1-ARs. This result indicates that β1-AABs recognize and stabilize the high-affinity state, but are unable to stabilize and (or) induce the low-affinity state receptor.
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Affiliation(s)
- Mohammed Amine Abdelkrim
- L’Université Nantes Angers Le Mans (LUNAM) – Oniris, UPSP 5304 de physiopathologie animale et de pharmacologie fonctionnelle, Atlanpole-La Chantrerie, BP 40706, Nantes, F-44307, France
| | - Mohamed Yassine Mallem
- L’Université Nantes Angers Le Mans (LUNAM) – Oniris, UPSP 5304 de physiopathologie animale et de pharmacologie fonctionnelle, Atlanpole-La Chantrerie, BP 40706, Nantes, F-44307, France
| | - Gérard Chatagnon
- L’Université Nantes Angers Le Mans (LUNAM) – Oniris, Biotechnologie Pathologie Reproduction/RSB, Atlanpole-La Chantrerie, BP 40706, Nantes, F-44307, France
| | - Marc Gogny
- L’Université Nantes Angers Le Mans (LUNAM) – Oniris, UPSP 5304 de physiopathologie animale et de pharmacologie fonctionnelle, Atlanpole-La Chantrerie, BP 40706, Nantes, F-44307, France
| | - Jean-Claude Desfontis
- L’Université Nantes Angers Le Mans (LUNAM) – Oniris, UPSP 5304 de physiopathologie animale et de pharmacologie fonctionnelle, Atlanpole-La Chantrerie, BP 40706, Nantes, F-44307, France
| | - Jacques Noireaud
- L’Université Nantes Angers Le Mans (LUNAM) – Oniris, UPSP 5304 de physiopathologie animale et de pharmacologie fonctionnelle, Atlanpole-La Chantrerie, BP 40706, Nantes, F-44307, France
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Mallem MY, Thuleau A, Noireaud J, Desfontis JC, Gogny M. Evaluation of the role of superoxide anions in endotoxin-induced impairment of β-adrenoceptor-mediated vasodilation in equine digital veins. Am J Vet Res 2010; 71:773-9. [DOI: 10.2460/ajvr.71.7.773] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Thorin C, Mallem MY, Noireaud J, Gogny M, Desfontis JC. Nonlinear mixed effects models applied to cumulative concentration–response curves. J Pharm Pharmacol 2010; 62:339-45. [DOI: 10.1211/jpp.62.03.0008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
Objectives
In experimental pharmacology, drug effect studies currently establish and analyse cumulative concentration–response curves (CCRC) under repeated measurements designs. Usually the CCRC parameters are estimated using the Hill's function in a nonlinear regression for independent data. The two-way analysis of variance is generally used to identify a statistical difference between the responses for two treatments but that analysis does not take into account the nonlinearity of the model and the heteroscedasticity (uneven distribution) of the data. We presently tested the possibility of finding a statistical solution for the nonlinear response in repeated measurements data using the nonlinear mixed effects (nlme) models.
Methods
Experimental data sets, originating from studies on β-adrenoceptor-induced relaxation in rat thoracic aorta ring, were analysed using the nlme methods.
Key findings
Comparison with classical methods showed the superiority of the nlme models approach. For each pharmacological parameter (Em, n, pD2), a point estimate, a standard error and a confidence interval are returned by the nlme procedures respecting the assumption of independency and normality of the residuals.
Conclusions
Using the method presently described, it is now possible to detect significant differences for each pharmacological parameter estimated in different situations, even for designs with small samples size (i.e. at least six complete curves).
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Affiliation(s)
- Chantal Thorin
- UPSP 5304 de Physiopathologie Animale et Pharmacologie Fonctionnelle, Ecole Nationale Vétérinaire, Agroalimentaire et de l'alimentation Nantes Atlantique, ONIRIS, France
| | - Mohamed Yassine Mallem
- UPSP 5304 de Physiopathologie Animale et Pharmacologie Fonctionnelle, Ecole Nationale Vétérinaire, Agroalimentaire et de l'alimentation Nantes Atlantique, ONIRIS, France
| | - Jacques Noireaud
- UPSP 5304 de Physiopathologie Animale et Pharmacologie Fonctionnelle, Ecole Nationale Vétérinaire, Agroalimentaire et de l'alimentation Nantes Atlantique, ONIRIS, France
| | - Marc Gogny
- UPSP 5304 de Physiopathologie Animale et Pharmacologie Fonctionnelle, Ecole Nationale Vétérinaire, Agroalimentaire et de l'alimentation Nantes Atlantique, ONIRIS, France
| | - Jean-Claude Desfontis
- UPSP 5304 de Physiopathologie Animale et Pharmacologie Fonctionnelle, Ecole Nationale Vétérinaire, Agroalimentaire et de l'alimentation Nantes Atlantique, ONIRIS, France
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Forest VF, Tirouvanziam AM, Perigaud C, Fernandes S, Fusellier MS, Desfontis JC, Toquet CS, Heymann MFM, Crochet DP, Lemarchand PF. Cell distribution after intracoronary bone marrow stem cell delivery in damaged and undamaged myocardium: implications for clinical trials. Stem Cell Res Ther 2010; 1:4. [PMID: 20504285 PMCID: PMC2873700 DOI: 10.1186/scrt4] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2009] [Accepted: 03/15/2010] [Indexed: 01/14/2023] Open
Abstract
INTRODUCTION Early randomized clinical trials of autologous bone marrow cardiac stem cell therapy have reported contradictory results highlighting the need for a better evaluation of protocol designs. This study was designed to quantify and compare whole body and heart cell distribution after intracoronary or peripheral intravenous injection of autologous bone marrow mononuclear cells in a porcine acute myocardial infarction model with late reperfusion. METHODS Myocardial infarction was induced using balloon inflation in the left coronary artery in domestic pigs. At seven days post-myocardial infarction, 1 x 10(8) autologous bone marrow mononuclear cells were labeled with fluorescent marker and/or 99mTc radiotracer, and delivered using intracoronary or peripheral intravenous injection (leg vein). RESULTS Scintigraphic analyses and Upsilon-emission radioactivity counting of harvested organs showed a significant cell fraction retained within the heart after intracoronary injection (6 +/- 1.7% of injected radioactivity at 24 hours), whereas following peripheral intravenous cell injection, no cardiac homing was observed at 24 hours and cells were mainly detected within the lungs. Importantly, no difference was observed in the percentage of retained cells within the myocardium in the presence or absence of myocardial infarction. Histological evaluation did not show arterial occlusion in both animal groups and confirmed the presence of bone marrow mononuclear cells within the injected myocardium area. CONCLUSIONS Intravenous bone marrow mononuclear cell injection was ineffective to target myocardium. Myocardial cell distribution following intracoronary injection did not depend on myocardial infarction presence, a factor that could be useful for cardiac cell therapy in patients with chronic heart failure of non-ischemic origin or with ischemic myocardium without myocardial infarction.
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Affiliation(s)
- Virginie F Forest
- INSERM UMR915, l'institut du thorax, IRT-Université de Nantes, 8 quai Moncousu, BP 70721, Nantes, F-44007 Cedex 1, France.
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Fusellier M, Desfontis JC, Madec S, Gautier F, Debailleul M, Gogny M. Influence of three anesthetic protocols on glomerular filtration rate in dogs. Am J Vet Res 2007; 68:807-11. [PMID: 17669018 DOI: 10.2460/ajvr.68.8.807] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To investigate renal function in clinically normal dogs when awake and during anesthesia with medetomidine; xylazine, ketamine, and halothane (XKH) combination; or propofol. ANIMALS 10 adult female Beagles. PROCEDURES At intervals of 15 days, dogs were administered medetomidine (0.05 mg/kg, IV); XKH combination (xylazine [1 mg/kg, IV], ketamine [5 mg/kg, IV], and halothane [1% end-tidal concentration]); or propofol (6 mg/kg, IV) to induce anesthesia or no treatment. Glomerular filtration rate was assessed on the basis of renal uptake (RU; determined via renal scintigraphy) and plasma clearance (CL) of technetium 99m-labeled diethylenetriamine pentaacetic acid ((99m)Tc-DTPA). RESULTS In awake dogs, mean +/- SEM RU was 9.7 +/- 0.4% and CL was 3.86 +/- 0.23 mL/min/ kg. Renal uptake and CL of (99m)Tc-DTPA were not significantly modified by administration of XKH (RU, 11.4 +/- 0.9%; CL, 4.6 +/- 0.32 mL/min/kg) or propofol (RU, 9.7 +/- 0.3%; CL, 3.78 +/- 0.37 mL/min/kg). Half-life elimination time of plasma (99m)Tc-DTPA decreased significantly in XKH-anesthetized dogs, compared with the value in awake dogs (14.4 minutes and 28.9 minutes, respectively). However, glomerular filtration rate was significantly decreased by administration of medetomidine (RU, 3.9 +/- 0.1%), and the time to maximum kidney activity was significantly increased (867 +/- 56 seconds vs 181 +/- 11 seconds without anesthesia). CONCLUSIONS AND CLINICAL RELEVANCE Results indicated that anesthesia with propofol or an XKH combination did not alter renal function in healthy Beagles, but anesthesia with medetomidine decreased early RU of (99m)Tc-DTPA.
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Affiliation(s)
- Marion Fusellier
- Animal Pathophysiology and Functional Pharmacology Unit (UPSP 5304), National Veterinary School, BP 40706, F-44307 Nantes, France
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Abstract
Low-affinity state beta1-adrenoceptor (beta1-AR) was functionally expressed in some blood vessels and was different from beta1, beta2 and beta3-AR. In rat aorta, low-affinity state beta1-AR activation produced an endothelium-independent relaxation which was impaired in spontaneously hypertensive rats (SHRs). In the present work, we investigated whether renin-angiotensin system was involved in this alteration by evaluating the effects of enalapril, an angiotensin converting enzyme (ACE) inhibitor or losartan, an AT1 angiotensin receptor antagonist. Cumulative concentration-response curves to low-affinity state beta1-AR agonists (CGP 12177, cyanopindolol or alprenolol) and to NS 1619, a large conductance Ca2+-activated K+ channels (BK) agonist were performed in denuded aortic rings isolated from control or treated Wistar Kyoto (WKY) rats or SHRs in different experimental conditions. The low-affinity state beta1-AR-mediated aortic vasodilation was impaired in 5 and 12 weeks old SHRs when compared to age-matched WKY. Twelve days enalapril (5 mg/kg/day) or losartan (15 mg/kg/day) treatments reduced systolic blood pressure (SBP) only in 12 weeks old SHRs whereas no significant change was observed in other groups. These treatments improved low-affinity state beta1-AR effect only in SHRs groups. In 12 weeks old WKY rats, CGP 12177-induced relaxation was insensitive to glibenclamide, a K(ATP)+ channel blocker, but was reduced by TEA or iberiotoxin, two large conductance Ca2+-activated K+ channel (BK) blockers. The impairment of NS 1619-induced vasodilation in both 5 and 12 weeks old SHRs was restored by enalapril or losartan. These results suggested that improvement of the low-affinity state beta1-AR-mediated vasodilation in 5 and 12 weeks old SHRs could be attributed to enhanced BK channels-induced hyperpolarization in SHRs independently of lowering of SBP.
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Affiliation(s)
- Mohamed Yassine Mallem
- UPSP 5304 de Physiopathologie Animale et de Pharmacologie Fonctionnelle, Ecole Nationale Vétérinaire, Nantes, France
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Lagarce F, Faisant N, Desfontis JC, Marescaux L, Gautier F, Holopherne D, Rousselet MC, Menei P, Benoit JP. Biopharmaceutics of intrathecal baclofen-loaded microparticles in a goat model. Int J Pharm 2005; 298:68-79. [PMID: 15919163 DOI: 10.1016/j.ijpharm.2005.03.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2004] [Revised: 03/21/2005] [Accepted: 03/25/2005] [Indexed: 10/25/2022]
Abstract
The goal of this study was to develop a goat model allowing reliable pharmacokinetic (PK) studies of intrathecal baclofen (ITB) sustained release dosage forms using an implanted silicone catheter. ITB PK parameters (clearance, volume of distribution) following intrathecal bolus injection were determined for doses ranging from 100 to 560 microg and a comparison to human data was made. Baclofen-loaded microparticles were then implanted in the intrathecal space of goats and the resulting baclofen levels were determined during 28 days. Finally, PK parameters were used to predict cerebrospinal fluid (CSF) baclofen rates from in vitro release profiles of baclofen-loaded microspheres. The catheter was well tolerated and did not interfere with behavioral testings. Baclofen CSF clearance (mean = 8.59+/-2.43 ml/h) and volume of distribution (21.06+/-13.32 ml) were not significantly affected by the increase of the dose (p > 0.05). In vivo, the baclofen levels in CSF were stabilized at 200 microg/l after a period of 3 days. The predictive value of the in vitro release studies was good since the theoretical levels ranged between 128 and 257 microg/l. In conclusion, a large animal model was developed and allowed the biopharmaceutic evaluation of baclofen microparticles injected via intrathecal route.
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Lagarce F, Faisant N, Desfontis JC, Marescaux L, Gautier F, Richard J, Menei P, Benoit JP. Baclofen-loaded microspheres in gel suspensions for intrathecal drug delivery: in vitro and in vivo evaluation. Eur J Pharm Biopharm 2005; 61:171-80. [PMID: 15967653 DOI: 10.1016/j.ejpb.2005.04.004] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2005] [Revised: 04/18/2005] [Accepted: 04/18/2005] [Indexed: 11/24/2022]
Abstract
Severe spasticity is a very disabling disorder treated by continuous baclofen intrathecal infusion which unfortunately remains an expensive and uncomfortable treatment. In order to address these issues, new sustained release formulations designed for intrathecal baclofen delivery were sought with the aim of minimising the burst effect of baclofen which can lead to toxicity. Baclofen was encapsulated in poly(lactide-co-glycolide) (PLGA) microspheres which were then dispersed in chitosan thermosensitive gels, Pluronic PF-127 gels, carboxymethylcellulose solutions or Ringer lactate solution. The release rate was assessed in vitro using continuous flow cells and in vivo after intrathecal injection in goats: baclofen was quantified in cerebrospinal fluid (CSF) and plasma, and the associated pharmacological effect was evaluated. The results showed that the burst effect was reduced by at least a factor of 2 in vitro, after microsphere dispersion in viscous media. In vivo, PF-127 gel was found to be the best vehicle to reduce the burst effect by a factor of 10 in CSF, and by a factor of 2 in plasma. The toxic effect of baclofen due to the burst effect was reduced by the dispersion in PF127 gels. Therapeutic levels of baclofen in CSF were maintained during at least 1 month.
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Mallem Y, Holopherne D, Reculeau O, Le Coz O, Desfontis JC, Gogny M. β-Adrenoceptor-mediated vascular relaxation in spontaneously hypertensive rats. Auton Neurosci 2005; 118:61-7. [PMID: 15795178 DOI: 10.1016/j.autneu.2005.01.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2004] [Revised: 01/07/2005] [Accepted: 01/09/2005] [Indexed: 11/30/2022]
Abstract
Although the impairment of beta-adrenoceptor (beta-AR)-induced vascular relaxation to isoprenaline has been extensively described, discrepancy persisted in the literature. In this work, we investigated beta-AR-induced relaxation in spontaneously hypertensive and normotensive rats aorta. We attempted to determine beta-AR subtypes involved in order to understand the conflicting data regarding the beta-AR-induced vasodilation to isoprenaline. Aortic rings isolated from 12-week-old Wistar Kyoto (WKY) rats and spontaneously hypertensive rats (SHRs) were placed in organ baths and constricted with phenylephrine (alpha1-AR agonist). Then, cumulative concentration-relaxation curves (CCRC) to AR agonists were constructed. In intact aortic rings from both strains, isoprenaline (a nonselective beta-AR agonist) (0.001-10 microM) induced similar concentration-dependent relaxations. CCRC was shifted to the right and upward in the presence of nadolol (a nonspecific beta1 and beta2-AR antagonist) (10 microM). After endothelium removal, the response to isoprenaline was partly inhibited in WKY rats, but was strongly inhibited in SHRs. In WKY rats, isoprenaline-induced endothelium-independent relaxation was not modified in the presence of nadolol but was inhibited in the presence of CGP 20712A (low-affinity-state beta1-AR antagonist). In endothelium-denuded rings, SR 58611A (a preferential beta3-AR agonist) (0.1-30 microM) produced a very small relaxation in both strains. In WKY rats, CGP 12177 (CGP) (0.1-30 microM) and cyanopindolol (0.01-3 microM) (partial beta3-AR and low-affinity-state beta1-AR agonists with beta1-AR and beta2-AR antagonistic properties) produced endothelium-independent relaxations. CGP-induced effect was significantly inhibited by CGP 20712A (10 microM) or bupranolol (10 microM) (low-affinity-state beta1-AR antagonists). In SHRs, similarly to the impaired endothelium-independent relaxation to isoprenaline, endothelium-independent relaxations to CGP and cyanopindolol were greatly blunted. These relaxations were not modified in the presence of CGP 20712A. In endothelium-denuded rings pretreated with pertussis toxin, CGP-induced relaxation was not modified in WKY rats, but was partly restored in SHRs. In conclusion, these results showed, that in 12-week-old SHRs, the endothelium-independent component of the relaxation to isoprenaline was impaired, and this impairment could involve the low-affinity-state beta1-AR. G(i) protein overexpression and/or overstimulation may be possible factors that contribute to this alteration in hypertension.
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Affiliation(s)
- Yassine Mallem
- Unité de Physiopathologie Animale et de Pharmacologie Fonctionnelle, UPSP 5304, Ecole Nationale Vétérinaire de Nantes, BP 40706, 44307 Nantes Cedex 03, France
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Mallem MY, Toumaniantz G, Serpillon S, Gautier F, Gogny M, Desfontis JC, Gauthier C. Impairment of the low-affinity state beta1-adrenoceptor-induced relaxation in spontaneously hypertensive rats. Br J Pharmacol 2004; 143:599-605. [PMID: 15466443 PMCID: PMC1575435 DOI: 10.1038/sj.bjp.0705990] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
1 In hypertension, a decrease of the vascular beta-adrenergic relaxation has been described. However, the specific involvement of each beta-adrenoceptor (beta-AR) subtype, in particular the low-affinity state of beta1-AR, has not yet been evaluated. We investigated whether the low-affinity state of beta1-AR-induced relaxation was impaired in Spontaneously Hypertensive Rats (SHR). 2 The relaxant responses to CGP 12177 and cyanopindolol, low-affinity state beta1-AR agonists (with beta1-/beta2-AR antagonistic and partial beta3-AR agonistic properties) were evaluated on thoracic aortic rings isolated from 12-weeks-old Wistar Kyoto rats (WKY) and SHR. 3 In WKY, CGP 12177 and cyanopindolol produced an endothelium and nitric oxide (NO)-independent relaxation. CGP 12177-induced endothelium-independent relaxation was not modified either by beta1-, beta2-AR (nadolol) or beta3-AR (L-748337 or SR 59230A) antagonists but was significantly reduced by high concentrations of CGP 20712A (P<0.05). This relaxation was also reduced by adenylyl cyclase inhibitors, SQ 22536 or MDL 12330A. 4 In SHR, CGP 12177 produced mainly an endothelium and NO-dependent relaxation. This effect was not modified by nadolol, but was strongly reduced by beta3-AR blockade. Endothelium-independent relaxation to CGP 12177 was not altered by adenylyl cyclase inhibition, but was amplified in preparations from pertussis toxin-pretreated SHR. 5 The immunohistochemical analysis revealed an upregulation of beta3-AR in the endothelial layer of SHR aorta, whereas the beta3-AR-induced relaxation was not modified. 6 In conclusion, we demonstrated an impaired low-affinity state of the beta1-AR-induced relaxation and an upregulation of the beta3-AR in hypertension. Some clinical implications of those findings are discussed.
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MESH Headings
- Adrenergic beta-Antagonists/pharmacology
- Animals
- Aorta, Thoracic/drug effects
- Dose-Response Relationship, Drug
- Enzyme Inhibitors/pharmacology
- Hypertension/physiopathology
- Immunohistochemistry
- In Vitro Techniques
- Male
- Muscle Relaxation/drug effects
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/physiopathology
- Nitric Oxide Synthase/antagonists & inhibitors
- Nitric Oxide Synthase Type III
- Pindolol/analogs & derivatives
- Pindolol/pharmacology
- Propanolamines/pharmacology
- Rats
- Rats, Inbred SHR
- Rats, Inbred WKY
- Receptors, Adrenergic, beta-1/drug effects
- omega-N-Methylarginine/pharmacology
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Affiliation(s)
- Mohamed Yassine Mallem
- UPSP 5304 de Physiopathologie Animale et de Pharmacologie Fonctionnelle, Ecole Nationale Vétérinaire, Nantes, France
| | | | - Sabrina Serpillon
- UPSP 5304 de Physiopathologie Animale et de Pharmacologie Fonctionnelle, Ecole Nationale Vétérinaire, Nantes, France
- Institut du Thorax, Inserm U533, Nantes, France
| | - Freddy Gautier
- UPSP 5304 de Physiopathologie Animale et de Pharmacologie Fonctionnelle, Ecole Nationale Vétérinaire, Nantes, France
| | - Marc Gogny
- UPSP 5304 de Physiopathologie Animale et de Pharmacologie Fonctionnelle, Ecole Nationale Vétérinaire, Nantes, France
| | - Jean-Claude Desfontis
- UPSP 5304 de Physiopathologie Animale et de Pharmacologie Fonctionnelle, Ecole Nationale Vétérinaire, Nantes, France
- Author for correspondence:
| | - Chantal Gauthier
- Institut du Thorax, Inserm U533, Nantes, France
- Faculté des Sciences et Techniques, Nantes, France
- Author for correspondence:
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Mallem MY, Gogny M, Gautier F, Bucas V, Desfontis JC. Evaluation of beta3-adrenoceptor-mediated relaxation in intact and endotoxin-treated equine digital veins. Am J Vet Res 2003; 64:708-14. [PMID: 12828256 DOI: 10.2460/ajvr.2003.64.708] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To investigate the functional expression of beta3-adrenoceptors (beta3-ARs) in equine digital veins (EDVs) and to examine whether beta3-AR relaxation was altered in EDVs incubated with endotoxin. SAMPLE POPULATION Forelimbs obtained from 30 horses. PROCEDURE Forelimbs were obtained from horses in an abattoir. Equine digital veins were carefully removed from distal portions of the forelimbs. Rings of dissected EDVs were mounted in 5-mL organ baths to record isometric tension in the presence of various beta3-AR agonists (SR 58611A, ZD 2079, and ZM 215001). RESULTS In intact EDVs, isoprenaline, SR 58611A, ZD 2079, and ZM 215001 induced concentration-dependent relaxation. Isoprenaline and SR 58611A-induced relaxations were reduced or unaffected by nadolol, respectively. In intact EDVs, SR 58611A-induced relaxation was significantly reduced in the presence of 2 microM ZM 215001 (used as a beta3-AR antagonist). In endothelium-denuded EDVs or intact EDVs in the presence of a nitric oxide synthase inhibitor, isoprenaline and SR 58611A-induced relaxations were significantly decreased. The endothelium-independent relaxation to SR 58611A was significantly inhibited in the presence of ZM 215001. In endotoxin-treated EDV, isoprenaline- and SR 58611A-induced relaxations were significantly reduced. In these conditions, cycloheximide (a protein synthesis inhibitor) and ibuprofen (a cyclooxygenase inhibitor) restored the relaxant response to SR 58611A. CONCLUSIONS AND CLINICAL RELEVANCE Beta3-adrenoceptors are functionally expressed in EDVs. Incubation in the presence of endotoxin, used as an in vitro model of laminitis, induced an alteration of beta-AR-mediated relaxations in EDVs, which could be the consequence of cyclooxygenase induction and subsequent prostanoid production.
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Affiliation(s)
- Mohamed Y Mallem
- Unit of Functional Pharmacology (UPSP 5304), National Veterinary School, Atlanpôle, BP 40706, 44307 Nantes, France
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