1
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Skinner S, Connes P, Sigaudo-Roussel D, Lo M, Liu KL, Nader E, Josset-Lamaugarny A, Charrin E, Martin C, Romanet-Faes C, Diaw M, Pialoux V, Fromy B. Altered blood rheology and impaired pressure-induced cutaneous vasodilation in a mouse model of combined type 2 diabetes and sickle cell trait. Microvasc Res 2018; 122:111-116. [PMID: 30513282 DOI: 10.1016/j.mvr.2018.11.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 11/28/2018] [Accepted: 11/30/2018] [Indexed: 02/08/2023]
Abstract
OBJECTIVE Type 2 diabetes (T2D)-related vascular dysfunction and hemorheological abnormalities could possibly be amplified by sickle cell trait (SCT). These alterations could potentially increase the risk of vascular complications in individuals with combined T2D and SCT. Therefore, this study used a mouse model to determine whether vascular function and blood rheology were more severely altered in combined T2D and SCT than in T2D or SCT alone. METHODS Townes transgenic mice with or without SCT received a 12-week high fat high sucrose or standard diet to create models of combined T2D-SCT, T2D, SCT, and controls. Pressure-induced vasodilation (PIV) and sodium nitroprusside (SNP)-mediated vasodilation in-vivo, and hemorheological parameters were measured. RESULTS No significant differences in blood viscosity, hematocrit, erythrocyte deformability, or PIV were observed between the control and T2D mice, or the control and SCT mice. However, blood viscosity, erythrocyte deformability, and PIV were significantly altered in the T2D-SCT mice compared to the control mice. There were no differences in SNP response between the groups. CONCLUSIONS Although neither T2D nor SCT alone had significant effects on blood rheology parameters or vascular function, combined T2D-SCT mice had significantly altered blood rheology and significantly impaired vascular function.
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Affiliation(s)
- Sarah Skinner
- LIBM EA7424, UCBL 1, Villeurbanne, France; Labex GR-Ex, Paris, France
| | - Philippe Connes
- LIBM EA7424, UCBL 1, Villeurbanne, France; Labex GR-Ex, Paris, France; Institut Universitaire de France, Paris, France.
| | | | - Ming Lo
- UMR 5305 CNRS, Lyon, France; Université de Lyon 1, UMR 5305, Lyon, France
| | - Kiao Ling Liu
- UMR 5305 CNRS, Lyon, France; Université de Lyon 1, UMR 5305, Lyon, France
| | - Elie Nader
- LIBM EA7424, UCBL 1, Villeurbanne, France; Labex GR-Ex, Paris, France
| | | | | | - Cyril Martin
- LIBM EA7424, UCBL 1, Villeurbanne, France; Labex GR-Ex, Paris, France
| | | | - Mor Diaw
- Laboratory of Physiology and Functional Exploration, FMPO, UCAD, Dakar, Senegal
| | - Vincent Pialoux
- LIBM EA7424, UCBL 1, Villeurbanne, France; Labex GR-Ex, Paris, France; Institut Universitaire de France, Paris, France
| | - Bérengère Fromy
- UMR 5305 CNRS, Lyon, France; Université de Lyon 1, UMR 5305, Lyon, France
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2
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Skinner SC, Diaw M, Pialoux V, Mbaye MN, Mury P, Lopez P, Bousquet D, Gueye F, Diedhiou D, Joly P, Renoux C, Sow D, Diop S, Ranque B, Vinet A, Samb A, Guillot N, Connes P. Increased Prevalence of Type 2 Diabetes-Related Complications in Combined Type 2 Diabetes and Sickle Cell Trait. Diabetes Care 2018; 41:2595-2602. [PMID: 30327363 DOI: 10.2337/dc18-1289] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Accepted: 09/24/2018] [Indexed: 02/03/2023]
Abstract
OBJECTIVE The prevalence of type 2 diabetes (T2D) is rapidly increasing in sub-Saharan Africa, where sickle cell trait (SCT) is also frequent. Although SCT is generally considered a benign condition, evidence suggests that SCT could exaggerate vascular dysfunction in T2D. However, it remains unclear whether SCT could increase the risk of the development of T2D complications. Therefore, this study was conducted to determine whether T2D complications were more prevalent among Senegalese individuals with SCT and T2D than among those with T2D only. RESEARCH DESIGN AND METHODS Rates of hypertension, retinopathy, peripheral neuropathy, peripheral artery disease, and impaired renal function as well as arterial stiffness, blood rheology, and concentrations of plasma advanced glycation end products (AGEs) and cytokines were compared between groups of Senegalese individuals with combined SCT and T2D (T2D-SCT) (n = 60), T2D (n = 52), SCT (n = 53), and neither T2D nor SCT (control) (n = 56). Human aortic endothelial cell (HAEC) expression of inflammatory and adhesion factors was measured after treatment with tumor necrosis factor-α and subjects' plasma. Effects of AGE inhibition or tiron on HAEC expression of E-selectin were measured. RESULTS Retinopathy, hypertension, and reduced renal function were more prevalent, and arterial stiffness, blood viscosity at high shear rates, and thixotropic index were higher, in the SCT group compared with the other groups. Multivariable analysis showed that plasma AGE concentration was significantly associated with arterial stiffness. E-selectin expression was elevated in HAECs treated with T2D-SCT plasma compared with the other groups, but AGE inhibition reversed this. CONCLUSIONS SCT could potentially augment the risk of the development of T2D-related complications, including retinopathy, nephropathy, and hypertension.
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Affiliation(s)
- Sarah C Skinner
- Inter-university Laboratory of Biology of Motor Function EA7424, Vascular Biology and the Red Blood Cell Team, Claude Bernard University Lyon 1, University de Lyon 1, Villeurbanne, France.,Laboratory of Excellence GR-EX, Paris, France
| | - Mor Diaw
- Laboratory of Physiology and Functional Exploration, Faculté de Medecine de Pharmacie et d'Odontologie, Université Cheikh Anta Diop de Dakar, Dakar, Senegal
| | - Vincent Pialoux
- Inter-university Laboratory of Biology of Motor Function EA7424, Vascular Biology and the Red Blood Cell Team, Claude Bernard University Lyon 1, University de Lyon 1, Villeurbanne, France.,Laboratory of Excellence GR-EX, Paris, France.,Institute of Universities of France, Paris, France
| | | | - Pauline Mury
- Inter-university Laboratory of Biology of Motor Function EA7424, Vascular Biology and the Red Blood Cell Team, Claude Bernard University Lyon 1, University de Lyon 1, Villeurbanne, France.,Laboratory of Excellence GR-EX, Paris, France
| | - Philomène Lopez
- Laboratory of Pharmaceutical Biochemistry, Faculté de Medecine de Pharmacie et d'Odontologie, Université Cheikh Anta Diop de Dakar, Dakar, Senegal
| | - Delphine Bousquet
- CarMeN Laboratory, INSERM 1060, Institut National des Sciences Appliquées 1397, Université Claude Bernard Lyon 1, Institut National des Sciences Appliquées Lyon, Villeurbanne, France
| | - Fatou Gueye
- Laboratory of Pharmaceutical Biochemistry, Faculté de Medecine de Pharmacie et d'Odontologie, Université Cheikh Anta Diop de Dakar, Dakar, Senegal
| | - Demba Diedhiou
- Medical Clinic II, Abass Ndao Hospital Center, Dakar, Senegal
| | - Philippe Joly
- Inter-university Laboratory of Biology of Motor Function EA7424, Vascular Biology and the Red Blood Cell Team, Claude Bernard University Lyon 1, University de Lyon 1, Villeurbanne, France.,Laboratory of Excellence GR-EX, Paris, France.,Laboratory of Biochemistry of Erythrocyte Pathologies, Biology Center East, Bron, France
| | - Céline Renoux
- Inter-university Laboratory of Biology of Motor Function EA7424, Vascular Biology and the Red Blood Cell Team, Claude Bernard University Lyon 1, University de Lyon 1, Villeurbanne, France.,Laboratory of Excellence GR-EX, Paris, France.,Laboratory of Biochemistry of Erythrocyte Pathologies, Biology Center East, Bron, France
| | - Djiby Sow
- Medical Clinic II, Abass Ndao Hospital Center, Dakar, Senegal
| | - Saliou Diop
- Laboratory of Hemato-Immunology, Faculté de Medecine de Pharmacie et d'Odontologie, Université Cheikh Anta Diop de Dakar, Dakar, Senegal
| | - Brigitte Ranque
- Laboratory of Excellence GR-EX, Paris, France.,INSERM, UMR_S970, Paris Descartes University, Sorbonne Paris Cité, Paris, France
| | - Agnès Vinet
- Laboratoire de Pharm-Ecologie Cardiovasculaire, Université d'Avignon, Avignon, France
| | - Abdoulaye Samb
- Laboratory of Physiology and Functional Exploration, Faculté de Medecine de Pharmacie et d'Odontologie, Université Cheikh Anta Diop de Dakar, Dakar, Senegal
| | - Nicolas Guillot
- CarMeN Laboratory, INSERM 1060, Institut National des Sciences Appliquées 1397, Université Claude Bernard Lyon 1, Institut National des Sciences Appliquées Lyon, Villeurbanne, France
| | - Philippe Connes
- Inter-university Laboratory of Biology of Motor Function EA7424, Vascular Biology and the Red Blood Cell Team, Claude Bernard University Lyon 1, University de Lyon 1, Villeurbanne, France .,Laboratory of Excellence GR-EX, Paris, France.,Institute of Universities of France, Paris, France
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3
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Ouédraogo V, Soleti R, Signolet I, Diaw M, Hallab M, Samb A, Andriantsitohaina R, Ba A, Lefthériotis G. [Impact of sickle cell trait on arterial stiffness in African subjects]. JOURNAL DE MÉDECINE VASCULAIRE 2017; 42:14-20. [PMID: 28705443 DOI: 10.1016/j.jdmv.2017.01.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Accepted: 12/12/2016] [Indexed: 10/19/2022]
Abstract
Sickle cell trait (SCT) is the benign condition of sickle cell disease. Often asymptomatic, the carriers of the sickle cell trait have hemorheological disturbances with increased oxidative stress compared to healthy subjects. These disturbances can lead to structural and functional changes in large vessels. The aim of the study was to measure arterial stiffness, an independent marker of subclinical atherosclerosis, SCT carriers compared to sickle cell anemia (SCA) subjects. Nine SCT carriers aged 32±9 years (7 men) were compared to 14 SCA subjects aged 29±9 years (2 men) and 22 control subjects aged 34±9 years (11 men) recruited by the National blood transfusion center (CNTS) in Dakar (Senegal). Arterial stiffness was assessed by measurement of the finger-toe pulse wave velocity (PWVft) using pOpmètre® (Axelife SAS-France). The cardiovascular risk (CVR) was assessed according to the Framingham Laurier score. The SCT carriers had a higher PWVft (m/s) than SCA subjects (8.2±2.2 vs 6.1±0.9m/s, P=0.004) but not different from that of healthy controls (8.2±2.2 vs 7.4±1.8m/s, P=0.33). Linear regression showed a positive relationship between PWVft and the pulse pressure (PP) (P˂0.001; r2=0.39; F=13.20). The results show that the SCT carriers have stiffer arteries than SCA subjects. Linear regressions adjusted for age, mean arterial pressure (MAP) and PP, showed that only age and PP were independently correlated with arterial stiffness in the entire population.
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Affiliation(s)
- V Ouédraogo
- Laboratoire de physiologie humaine, faculté de médecine, de pharmacie et d'odontologie, UCAD, BP 5005, Dakar-Fann, Sénégal.
| | - R Soleti
- Laboratoire Inserm U1063-SOPAM, université d'Angers, 49933 Angers cedex 9, France
| | - I Signolet
- Laboratoire de biochimie, CHU d'Angers, 49933 Angers cedex, France
| | - M Diaw
- Laboratoire de physiologie humaine, faculté de médecine, de pharmacie et d'odontologie, UCAD, BP 5005, Dakar-Fann, Sénégal
| | - M Hallab
- Hôpital universitaire de Nantes, place Ricordeau, 44000 Nantes, France
| | - A Samb
- Laboratoire de physiologie humaine, faculté de médecine, de pharmacie et d'odontologie, UCAD, BP 5005, Dakar-Fann, Sénégal; Unité mixte internationale (UMI 3189), « Environnement, Santé, Sociétés », CNRS, UCAD, CNRST, USTTB, UGB, Dakar, Sénégal
| | - R Andriantsitohaina
- Laboratoire Inserm U1063-SOPAM, université d'Angers, 49933 Angers cedex 9, France
| | - A Ba
- Laboratoire de physiologie humaine, faculté de médecine, de pharmacie et d'odontologie, UCAD, BP 5005, Dakar-Fann, Sénégal; Unité mixte internationale (UMI 3189), « Environnement, Santé, Sociétés », CNRS, UCAD, CNRST, USTTB, UGB, Dakar, Sénégal
| | - G Lefthériotis
- Laboratoire de biologie neurovasculaire et mitochondriale intégrée, UMR CNRS 6214-Inserm 1083, faculté de médecine, 49045 Angers, France
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4
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Xu Z, Zheng Y, Wang X, Shehata N, Wang C, Xie S, Sun Y. Stiffening of sickle cell trait red blood cells under simulated strenuous exercise conditions. MICROSYSTEMS & NANOENGINEERING 2016; 2:16061. [PMID: 31057840 PMCID: PMC6444709 DOI: 10.1038/micronano.2016.61] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2016] [Revised: 07/21/2016] [Accepted: 07/21/2016] [Indexed: 05/19/2023]
Abstract
The higher risk of vaso-occlusion events and sudden death for sickle-cell trait (SCT) athletes has been speculatively ascribed to SCT red blood cell (RBC) stiffening during strenuous exercise. However, the microenvironmental changes that could induce the stiffening of SCT RBCs are unknown. To address this question, we measured the mechanical properties of and changes in SCT RBCs under deoxygenated and acidic environments, which are two typical conditions present in the circulation of athletes undertaking strenuous exercise. The results reveal that SCT RBCs are inherently stiffer than RBCs from non-SCT healthy subjects, and a lower pH further stiffens the SCT cells. Furthermore, at both normal and low pH levels, deoxygenation was found to not be the cause of the stiffness of SCT RBCs. This study confirms that the stiffening of SCT RBCs occurs at a low pH and implies that SCT RBC stiffening could be responsible for vaso-occlusion in SCT athletes during strenuous exercise.
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Affiliation(s)
- Zhensong Xu
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON, Canada
| | - Yi Zheng
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON, Canada
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, ON, Canada
| | - Xian Wang
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON, Canada
| | - Nadine Shehata
- Department of Medicine, University of Toronto, Toronto, ON, Canada
| | - Chen Wang
- Department of Pathology and Laboratory Medicine, Mount Sinai Hospital, Toronto, ON, Canada
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
- ()
| | - Shaorong Xie
- School of Mechatronic Engineering and Automation, Shanghai University, Shanghai, China
- ()
| | - Yu Sun
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON, Canada
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, ON, Canada
- School of Mechatronic Engineering and Automation, Shanghai University, Shanghai, China
- Department of Electrical and Computer Engineering, University of Toronto, Toronto, ON, Canada
- ()
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5
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Alexy T, Sangkatumvong S, Connes P, Pais E, Tripette J, Barthelemy JC, Fisher TC, Meiselman HJ, Khoo MC, Coates TD. Sickle cell disease: selected aspects of pathophysiology. Clin Hemorheol Microcirc 2010; 44:155-66. [PMID: 20364061 DOI: 10.3233/ch-2010-1270] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Sickle cell disease (SCD), a genetically-determined pathology due to an amino acid substitution (i.e., valine for glutamic acid) on the beta-chain of hemoglobin, is characterized by abnormal blood rheology and periods of painful vascular occlusive crises. Sickle cell trait (SCT) is a typically benign variant in which only one beta chain is affected by the mutation. Although both SCD and SCT have been the subject of numerous studies, information related to neurological function and transfusion therapy is still incomplete: an overview of these areas is presented. An initial section provides pertinent background information on the pathology and clinical significance of these diseases. The roles of three factors in the clinical manifestations of the diseases are then discussed: hypoxia, autonomic nervous system regulation and blood rheology. The possibility of a causal relationship between these three factors and sudden death is also examined. It is concluded that further studies in these specific areas are warranted. It is anticipated that the outcome of such research is likely to provide valuable insights into the pathophysiology of SCD and SCT and will lead to improved clinical management and enhanced quality of life.
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Affiliation(s)
- T Alexy
- Department of Physiology and Biophysics, Keck School of Medicine, Los Angeles, CA 90033, USA.
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6
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Tripette J, Loko G, Samb A, Gogh BD, Sewade E, Seck D, Hue O, Romana M, Diop S, Diaw M, Brudey K, Bogui P, Cissé F, Hardy-Dessources MD, Connes P. Effects of hydration and dehydration on blood rheology in sickle cell trait carriers during exercise. Am J Physiol Heart Circ Physiol 2010; 299:H908-14. [DOI: 10.1152/ajpheart.00298.2010] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study compared the hemorheological responses of a group of sickle cell trait (SCT) carriers with those of a control (Cont) group in response to 40 min of submaximal exercise (exercise intensity, 55% aerobic peak power) performed in two conditions: one with water offered ad libitum, i.e., the hydration (Hyd) condition, and one without water, i.e., the dehydration (Dehyd) condition. Blood and plasma viscosities, as well as red blood cell rigidity, were determined at rest, at the end of exercise, and at 2 h recovery with a cone plate viscometer at high shear rate and 37°C. The SCT and Cont groups lost 1 ± 0.7 and 1.6 ± 0.6 kg of body weight, respectively, in the Dehyd condition, indicating a significant effect of water deprivation compared with the Hyd condition, in which body weight remained unchanged. Plasma viscosity increased with exercise and returned to baseline during recovery independently of the group and condition. As previously demonstrated, resting blood viscosity was greater in the SCT carriers than in the Cont group. Blood viscosity increased by the end of exercise and returned to baseline at 2 h recovery in the Cont group in both conditions. The blood viscosity of SCT carriers did not change in response to exercise in the Dehyd condition and remained elevated at 2 h recovery. This extended hyperviscosity, in association with other biological changes induced by exercise, could be considered as a risk factor for exercise-related events in SCT carriers, similar to vasoocclusive crises, notably during the recovery. In contrast, the Hyd condition normalized the hyperviscosity and red blood cell rigidity of the SCT carriers, with blood viscosity values reaching the same lower values as those found in the Cont group during the recovery. Adequate hydration of SCT carriers should be strongly promoted to reduce the clinical risk associated with potential hyperviscosity complications.
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Affiliation(s)
- Julien Tripette
- Laboratoire Acclimation au Climat Tropical, Exercice et Santé (EA 3596), Département de Physiologie, Université des Antilles et de la Guyane, Pointe-à-Pitre, Guadeloupe
- Institut National de la Sante et de la Recherche Medicale U763, Université des Antilles et de la Guyane, Pointe-à-Pitre, Guadeloupe
| | - Gylna Loko
- Laboratoire Acclimation au Climat Tropical, Exercice et Santé (EA 3596), Département de Physiologie, Université des Antilles et de la Guyane, Pointe-à-Pitre, Guadeloupe
- Centre Intégré de la Drépanocytose, CH du Lamentin, Martinique-Centre de Références Maladies Rares Antilles-Guyane
| | - Abdoulaye Samb
- Laboratoire de Physiologie, Faculté de Médecine et de Pharmacie, Université Cheikh Anta Diop, Dakar, Sénégal
| | - Bertin Doubi Gogh
- Laboratoire de Physiologie et d'Explorations Fonctionnelles, Unité de Formation et de Recherche en Sciences Médicales, Université de Cocody, Abidjan, Côte d'Ivoire
| | - Estelle Sewade
- Laboratoire de Physiologie, Faculté de Médecine et de Pharmacie, Université Cheikh Anta Diop, Dakar, Sénégal
| | - Djibril Seck
- Institut National Supérieur de l'Education Populaire et du Sport, Université Cheikh Anta Diop, Dakar, Sénégal
| | - Olivier Hue
- Laboratoire Acclimation au Climat Tropical, Exercice et Santé (EA 3596), Département de Physiologie, Université des Antilles et de la Guyane, Pointe-à-Pitre, Guadeloupe
| | - Marc Romana
- Institut National de la Sante et de la Recherche Medicale U763, Université des Antilles et de la Guyane, Pointe-à-Pitre, Guadeloupe
| | - Saliou Diop
- Centre National de Transfusion Sanguine, Dakar, Sénégal
| | - Mor Diaw
- Laboratoire de Physiologie, Faculté de Médecine et de Pharmacie, Université Cheikh Anta Diop, Dakar, Sénégal
| | - Karine Brudey
- Unité Transversale de la Drépanocytose, Centre Hospitalier Universitaire, Pointe-à-Pitre, Guadeloupe-Centre de Références Maladies Rares Antilles-Guyane
| | - Pascal Bogui
- Laboratoire de Physiologie et d'Explorations Fonctionnelles, Unité de Formation et de Recherche en Sciences Médicales, Université de Cocody, Abidjan, Côte d'Ivoire
| | - Fallou Cissé
- Laboratoire de Physiologie, Faculté de Médecine et de Pharmacie, Université Cheikh Anta Diop, Dakar, Sénégal
| | - Marie-Dominique Hardy-Dessources
- Institut National de la Sante et de la Recherche Medicale U763, Université des Antilles et de la Guyane, Pointe-à-Pitre, Guadeloupe
| | - Philippe Connes
- Laboratoire Acclimation au Climat Tropical, Exercice et Santé (EA 3596), Département de Physiologie, Université des Antilles et de la Guyane, Pointe-à-Pitre, Guadeloupe
- Institut National de la Sante et de la Recherche Medicale U763, Université des Antilles et de la Guyane, Pointe-à-Pitre, Guadeloupe
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7
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Hue O, Connes P, Romana M, Etienne-Julan M, Hardy-Dessources MD. A medical consideration for sickle cell trait carriers in sports: example of Guadeloupe. Scand J Med Sci Sports 2009; 19:603-5. [DOI: 10.1111/j.1600-0838.2009.00944.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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8
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HEDREVILLE MONA, CONNES PHILIPPE, ROMANA MARC, MAGNAVAL GUILLAUME, DAVID THIERRY, HARDY-DESSOURCES MARIEDOMINIQUE, BELLOY MARIESYLVAINE, ETIENNE-JULAN MARYSE, HUE OLIVIER. Central Retinal Vein Occlusion in a Sickle Cell Trait Carrier after a Cycling Race. Med Sci Sports Exerc 2009; 41:14-8. [DOI: 10.1249/mss.0b013e31818313d0] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Hédreville M, Barthélémy JC, Tripette J, Roche F, Hardy-Dessources MD, Pichot V, Hue O, Connes P. Effects of strenuous exercise on autonomic nervous system activity in sickle cell trait carriers. Auton Neurosci 2008; 143:68-72. [PMID: 18755637 DOI: 10.1016/j.autneu.2008.07.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2008] [Revised: 07/18/2008] [Accepted: 07/21/2008] [Indexed: 10/21/2022]
Abstract
This study compared the nocturnal autonomic nervous system (ANS) activity in seven sickle cell trait (SCT) carriers and six subjects with normal hemoglobin in response to exercise Sympathetic and parasympathetic indices of nocturnal ANS were measured in the two groups before and 24 and 48 h after a strenuous exercise consisting of the repetition of three maximal exercise bouts. Global ANS activity decreased 24 h after exercise in both groups and was lower before as well as after exercise in SCT carriers. Indices of parasympathetic activity were lower in SCT carriers at all times, indicating a persistent sympatho-vagal imbalance. Exercise did not cause a rebound in parasympathetic activity in either group, but a rebound was noted for sympathetic index values two days after exercise in SCT group only. The ANS activity was generally lower, and the sympatho-vagal imbalance greater, in SCT carriers compared with control subjects irrespective of exercise and could increase the risk for medical complications in this population.
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Affiliation(s)
- Mona Hédreville
- Université des Antilles et de la Guyane, Laboratoire ACTES (EA 3596), Département de Physiologie, Campus de Fouillole, 97159 Pointe-à-Pitre, Guadeloupe, France
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10
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Connes P, Reid H, Hardy-Dessources MD, Morrison E, Hue O. Physiological Responses of Sickle Cell Trait Carriers during Exercise. Sports Med 2008; 38:931-46. [DOI: 10.2165/00007256-200838110-00004] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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11
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Alterations of blood rheology during and after exercise are both consequences and modifiers of body's adaptation to muscular activity. Sci Sports 2007. [DOI: 10.1016/j.scispo.2007.09.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Rebuttal from Dr. Connes. J Appl Physiol (1985) 2007. [DOI: 10.1152/japplphysiol.00338.2007c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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13
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Connes P, Hardy-Dessources MD, Hue O. Counterpoint: Sickle cell trait should not be considered asymptomatic and as a benign condition during physical activity. J Appl Physiol (1985) 2007; 103:2138-40; discussion 2140-1. [DOI: 10.1152/japplphysiol.00338.2007a] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Abstract
OBJECTIVE To determine if the time courses of hemorheologic parameters are different between carriers of sickle cell trait (SCT) and subjects with normal hemoglobin in response to exercise. DESIGN Observational and comparative study. SETTING Testing was conducted in a laboratory of exercise physiology. PARTICIPANTS Nine carriers of sickle cell trait (SCT group) and 7 subjects with normal hemoglobin (CONT group) performed an exercise protocol of the repetition of 3 successive maximal ramp exercise tests. INTERVENTIONS Blood was sampled at rest (TR), at the end of each of the 3 tests (T1, T2, T3), and during the immediate (T2h) and late (T24h, T48h) recovery periods. MAIN OUTCOME MEASUREMENTS Blood and plasma viscosity (etab and etap, respectively), hematocrit (Hct), and red blood cell (RBC) rigidity (Tk and k indexes) were determined. RESULTS In both groups, etab significantly increased in response to exercise but the SCT group had significantly higher etab at T3 and T2h. etab then returned to baseline value at T2h in the CONT group and at T24h in the SCT group. Tk and k were not changed by exercise but significantly increased above baseline value in both groups at T24h and T48h. The increase in Tk and k during late recovery was higher in the SCT group than in the CONT group, indicating that SCT carriers had significantly higher RBC rigidity than the CONT group at that time. CONCLUSIONS The hemorheologic changes induced by exercise in the SCT carriers could trigger microcirculatory disorders during the recovery.
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