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Fédou C, Camus M, Lescat O, Feuillet G, Mueller I, Ross B, Buléon M, Neau E, Alves M, Goudounéche D, Breuil B, Boizard F, Bardou Q, Casemayou A, Tack I, Dreux S, Batut J, Blader P, Burlet-Schiltz O, Decramer S, Wirth B, Klein J, Saulnier-Blache JS, Buffin-Meyer B, Schanstra JP. Mapping of the amniotic fluid proteome of fetuses with congenital anomalies of the kidney and urinary tract identifies plastin 3 as a protein involved in glomerular integrity. J Pathol 2021; 254:575-588. [PMID: 33987838 DOI: 10.1002/path.5703] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 05/04/2021] [Accepted: 05/10/2021] [Indexed: 11/07/2022]
Abstract
Congenital anomalies of the kidney and the urinary tract (CAKUT) are the first cause of chronic kidney disease in childhood. Several genetic and environmental origins are associated with CAKUT, but most pathogenic pathways remain elusive. Considering the amniotic fluid (AF) composition as a proxy for fetal kidney development, we analyzed the AF proteome from non-severe CAKUT (n = 19), severe CAKUT (n = 14), and healthy control (n = 22) fetuses using LC-MS/MS. We identified 471 significant proteins that discriminated the three AF groups with 81% precision. Among them, eight proteins independent of gestational age (CSPG4, LMAN2, ENDOD1, ANGPTL2, PRSS8, NGFR, ROBO4, PLS3) were associated with both the presence and the severity of CAKUT. Among those, five were part of a protein-protein interaction network involving proteins previously identified as being potentially associated with CAKUT. The actin-bundling protein PLS3 (plastin 3) was the only protein displaying a gradually increased AF abundance from control, via non-severe, to severe CAKUT. Immunohistochemistry experiments showed that PLS3 was expressed in the human fetal as well as in both the fetal and the postnatal mouse kidney. In zebrafish embryos, depletion of PLS3 led to a general disruption of embryonic growth including reduced pronephros development. In postnatal Pls3-knockout mice, kidneys were macroscopically normal, but the glomerular ultrastructure showed thickening of the basement membrane and fusion of podocyte foot processes. These structural changes were associated with albuminuria and decreased expression of podocyte markers including Wilms' tumor-1 protein, nephrin, and podocalyxin. In conclusion, we provide the first map of the CAKUT AF proteome that will serve as a reference for future studies. Among the proteins strongly associated with CAKUT, PLS3 did surprisingly not specifically affect nephrogenesis but was found as a new contributor in the maintenance of normal kidney function, at least in part through the control of glomerular integrity. © 2021 The Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Camille Fédou
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1297, Institut of Cardiovascular and Metabolic Disease, Toulouse, France.,Université Toulouse III Paul-Sabatier, Toulouse, France
| | - Mylène Camus
- Institut de Pharmacologie et Biologie Structurale (IPBS), Université de Toulouse, UPS, CNRS, Toulouse, France
| | - Ophélie Lescat
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1297, Institut of Cardiovascular and Metabolic Disease, Toulouse, France.,Université Toulouse III Paul-Sabatier, Toulouse, France
| | - Guylène Feuillet
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1297, Institut of Cardiovascular and Metabolic Disease, Toulouse, France.,Université Toulouse III Paul-Sabatier, Toulouse, France
| | - Ilka Mueller
- Institute of Human Genetics, Center for Molecular Medicine Cologne, Institute for Genetics, and Center for Rare Diseases Cologne, University of Cologne, Cologne, Germany
| | - Bryony Ross
- Institute of Human Genetics, Center for Molecular Medicine Cologne, Institute for Genetics, and Center for Rare Diseases Cologne, University of Cologne, Cologne, Germany
| | - Marie Buléon
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1297, Institut of Cardiovascular and Metabolic Disease, Toulouse, France.,Université Toulouse III Paul-Sabatier, Toulouse, France
| | - Eric Neau
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1297, Institut of Cardiovascular and Metabolic Disease, Toulouse, France.,Université Toulouse III Paul-Sabatier, Toulouse, France
| | - Melinda Alves
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1297, Institut of Cardiovascular and Metabolic Disease, Toulouse, France.,Université Toulouse III Paul-Sabatier, Toulouse, France
| | - Dominique Goudounéche
- Centre de Microscopie Electronique Appliquée à la Biologie (CMEAB), Faculté de Médecine Rangueil, University of Toulouse, Toulouse, France
| | - Benjamin Breuil
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1297, Institut of Cardiovascular and Metabolic Disease, Toulouse, France.,Université Toulouse III Paul-Sabatier, Toulouse, France
| | - Franck Boizard
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1297, Institut of Cardiovascular and Metabolic Disease, Toulouse, France.,Université Toulouse III Paul-Sabatier, Toulouse, France
| | - Quentin Bardou
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1297, Institut of Cardiovascular and Metabolic Disease, Toulouse, France.,Université Toulouse III Paul-Sabatier, Toulouse, France
| | - Audrey Casemayou
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1297, Institut of Cardiovascular and Metabolic Disease, Toulouse, France.,Université Toulouse III Paul-Sabatier, Toulouse, France.,Département de Néphrologie et Transplantation d'Organes, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - Ivan Tack
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1297, Institut of Cardiovascular and Metabolic Disease, Toulouse, France.,Université Toulouse III Paul-Sabatier, Toulouse, France
| | - Sophie Dreux
- Unité de Biochimie Fœto-Placentaire, Laboratoire de Biochimie - Hormonologie CHU Robert Debré, AP-HP, Paris, France
| | - Julie Batut
- Molecular, Cellular and Developmental Biology Unit (MCD, UMR5077), Centre de Biologie Intégrative (CBI, FR3743), Université de Toulouse, Toulouse, France
| | - Patrick Blader
- Molecular, Cellular and Developmental Biology Unit (MCD, UMR5077), Centre de Biologie Intégrative (CBI, FR3743), Université de Toulouse, Toulouse, France
| | - Odile Burlet-Schiltz
- Institut de Pharmacologie et Biologie Structurale (IPBS), Université de Toulouse, UPS, CNRS, Toulouse, France
| | - Stéphane Decramer
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1297, Institut of Cardiovascular and Metabolic Disease, Toulouse, France.,Université Toulouse III Paul-Sabatier, Toulouse, France.,Service de Néphrologie Pédiatrique, Hôpital des Enfants, CHU Toulouse, Toulouse, France.,Centre De Référence des Maladies Rénales Rares du Sud-Ouest (SORARE), Toulouse, France
| | - Brunhilde Wirth
- Institute of Human Genetics, Center for Molecular Medicine Cologne, Institute for Genetics, and Center for Rare Diseases Cologne, University of Cologne, Cologne, Germany
| | - Julie Klein
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1297, Institut of Cardiovascular and Metabolic Disease, Toulouse, France.,Université Toulouse III Paul-Sabatier, Toulouse, France
| | - Jean Sébastien Saulnier-Blache
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1297, Institut of Cardiovascular and Metabolic Disease, Toulouse, France.,Université Toulouse III Paul-Sabatier, Toulouse, France
| | - Bénédicte Buffin-Meyer
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1297, Institut of Cardiovascular and Metabolic Disease, Toulouse, France.,Université Toulouse III Paul-Sabatier, Toulouse, France
| | - Joost P Schanstra
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1297, Institut of Cardiovascular and Metabolic Disease, Toulouse, France.,Université Toulouse III Paul-Sabatier, Toulouse, France
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Fédou C, Lescat O, Feuillet G, Buléon M, Neau E, Breuil B, Alvès M, Batut J, Blader P, Decramer S, Saulnier-Blache JS, Klein J, Buffin-Meyer B, Schanstra JP. The low affinity p75 neurotrophin receptor is down-regulated in congenital anomalies of the kidney and the urinary tract: Possible involvement in early nephrogenesis. Biochem Biophys Res Commun 2020; 533:786-791. [PMID: 32988586 DOI: 10.1016/j.bbrc.2020.09.084] [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: 09/07/2020] [Accepted: 09/20/2020] [Indexed: 12/14/2022]
Abstract
Congenital Anomalies of the Kidney and of the Urinary Tract (CAKUT) cover a broad range of disorders including abnormal kidney development caused by defective nephrogenesis. Here we explored the possible involvement of the low affinity p75 neurotrophin receptor (p75NTR) in CAKUT and nephrogenesis. In mouse, p75NTR was highly expressed in fetal kidney, located within cortical early nephrogenic bodies, and decreased rapidly after birth. In human control fetal kidney, p75NTR was also located within the early nephrogenic bodies as well as in the mature glomeruli, presumably in the mesangium. In CAKUT fetal kidneys, the kidney cortical structure and the localization of p75NTR were often disorganized, and quantification of p75NTR in amniotic fluid revealed a significant reduction in CAKUT compared to control. Finally, invalidation of p75NTR in zebrafish embryo with an antisense morpholino significantly altered pronephros development. Our results indicate that renal p75NTR is altered in CAKUT fetuses, and could participate to early nephrogenesis.
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Affiliation(s)
- Camille Fédou
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1048, Institut of Cardiovascular and Metabolic Disease, Toulouse, France; Université Toulouse III Paul-Sabatier, Toulouse, France
| | - Ophélie Lescat
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1048, Institut of Cardiovascular and Metabolic Disease, Toulouse, France; Université Toulouse III Paul-Sabatier, Toulouse, France
| | - Guylène Feuillet
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1048, Institut of Cardiovascular and Metabolic Disease, Toulouse, France; Université Toulouse III Paul-Sabatier, Toulouse, France
| | - Marie Buléon
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1048, Institut of Cardiovascular and Metabolic Disease, Toulouse, France; Université Toulouse III Paul-Sabatier, Toulouse, France
| | - Eric Neau
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1048, Institut of Cardiovascular and Metabolic Disease, Toulouse, France; Université Toulouse III Paul-Sabatier, Toulouse, France
| | - Benjamin Breuil
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1048, Institut of Cardiovascular and Metabolic Disease, Toulouse, France; Université Toulouse III Paul-Sabatier, Toulouse, France
| | - Mélinda Alvès
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1048, Institut of Cardiovascular and Metabolic Disease, Toulouse, France; Université Toulouse III Paul-Sabatier, Toulouse, France
| | - Julie Batut
- Centre de Biologie du Développement (CBD, UMR5547), Centre de Biologie Intégrative (CBI, FR3743), Université de Toulouse, Toulouse, France
| | - Patrick Blader
- Centre de Biologie du Développement (CBD, UMR5547), Centre de Biologie Intégrative (CBI, FR3743), Université de Toulouse, Toulouse, France
| | - Stéphane Decramer
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1048, Institut of Cardiovascular and Metabolic Disease, Toulouse, France; Université Toulouse III Paul-Sabatier, Toulouse, France; Service de Néphrologie Pédiatrique, Hôpital des Enfants, CHU Toulouse, Toulouse, France; Centre De Référence des Maladies Rénales Rares du Sud-Ouest (SORARE), Toulouse, France
| | - Jean Sébastien Saulnier-Blache
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1048, Institut of Cardiovascular and Metabolic Disease, Toulouse, France; Université Toulouse III Paul-Sabatier, Toulouse, France.
| | - Julie Klein
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1048, Institut of Cardiovascular and Metabolic Disease, Toulouse, France; Université Toulouse III Paul-Sabatier, Toulouse, France
| | - Bénédicte Buffin-Meyer
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1048, Institut of Cardiovascular and Metabolic Disease, Toulouse, France; Université Toulouse III Paul-Sabatier, Toulouse, France.
| | - Joost P Schanstra
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1048, Institut of Cardiovascular and Metabolic Disease, Toulouse, France; Université Toulouse III Paul-Sabatier, Toulouse, France.
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Fédou C, Feuillet G, Lescat O, Camus M, Burlet-Schiltz O, Klein J, Decramer S, Buffin-Meyer B, Saulnier-Blache J, Schanstra J. Identification de la Plastine-3 comme nouvel acteur du développement rénal. Nephrol Ther 2020. [DOI: 10.1016/j.nephro.2020.07.027] [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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Marinari G, Espitalier-Rivière C, Fédou C, Romain AJ, Raynaud de Mauverger E, Brun JF. Activité physique, obésité et cancer du sein : quelles conclusions pratiques ? Sci Sports 2019. [DOI: 10.1016/j.scispo.2019.04.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Brun JF, Richou M, Bughin F, Fédou C, Nocca D, Ghanassia E, Mercier J. Complémentarité à long terme des effets amaigrissants de l’activité physique en endurance ciblée au LIPOXmax et de la gastrectomie en manchon. NUTR CLIN METAB 2018. [DOI: 10.1016/j.nupar.2018.09.149] [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: 11/26/2022]
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Marinari G, Espitalier-Rivière C, Fédou C, Romain AJ, Brun JF. Balance des substrats à l’exercice déterminée par calorimétrie d’effort chez des patientes entreprenant un réentraînement après traitement d’un cancer mammaire. Sci Sports 2018. [DOI: 10.1016/j.scispo.2017.12.001] [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: 10/18/2022]
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Brun J, Criqui C, Cartry E, Fédou C, Orsetti A. Microalbuminuria in diabetics: Possible involvement of hemorheologic factors in baseline excretion but not in exercise-induced rise. Clin Hemorheol Microcirc 2016. [DOI: 10.3233/ch-1989-9219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- J.F. Brun
- Department of Physiological Exploration of Hormones and Metabolism, (Professor A. Orsetti), Lapeyronie Hospital, F-34079 Montpellier Cédex, France
| | - C. Criqui
- Department of Physiological Exploration of Hormones and Metabolism, (Professor A. Orsetti), Lapeyronie Hospital, F-34079 Montpellier Cédex, France
| | - E. Cartry
- Department of Metabolic Diseases (Professeur J. Mirouze) Lapeyronie Hospital, F-34079 Montpellier-Cédex, France
| | - C. Fédou
- Department of Physiological Exploration of Hormones and Metabolism, (Professor A. Orsetti), Lapeyronie Hospital, F-34079 Montpellier Cédex, France
| | - A. Orsetti
- Department of Physiological Exploration of Hormones and Metabolism, (Professor A. Orsetti), Lapeyronie Hospital, F-34079 Montpellier Cédex, France
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Brun J, Sekkat M, Lagoueyte C, Fédou C, Orsetti A. Relationships between fitness and blood viscosity in untrained normal short children. Clin Hemorheol Microcirc 2016. [DOI: 10.3233/ch-1989-9606] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- J.F. Brun
- Service d’Exploration Physiologique des Hormones et des Métabolismes, Hôpital Lapeyronie, Montpellicr, France
- Laboratoire de Physiologie II, Institut de Biologie, Faculté de Médecine, 34060 Montpellier, France
| | - M. Sekkat
- Service d’Exploration Physiologique des Hormones et des Métabolismes, Hôpital Lapeyronie, Montpellicr, France
- Laboratoire de Physiologie II, Institut de Biologie, Faculté de Médecine, 34060 Montpellier, France
| | - C. Lagoueyte
- Service d’Exploration Physiologique des Hormones et des Métabolismes, Hôpital Lapeyronie, Montpellicr, France
- Laboratoire de Physiologie II, Institut de Biologie, Faculté de Médecine, 34060 Montpellier, France
| | - C. Fédou
- Service d’Exploration Physiologique des Hormones et des Métabolismes, Hôpital Lapeyronie, Montpellicr, France
- Laboratoire de Physiologie II, Institut de Biologie, Faculté de Médecine, 34060 Montpellier, France
| | - A. Orsetti
- Service d’Exploration Physiologique des Hormones et des Métabolismes, Hôpital Lapeyronie, Montpellicr, France
- Laboratoire de Physiologie II, Institut de Biologie, Faculté de Médecine, 34060 Montpellier, France
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Brun JF, Romain A, Sferlazza A, Fédou C, Raynaud de Mauverger E, Mercier J. Which individuals become fatter when they practice exercise? Sci Sports 2016. [DOI: 10.1016/j.scispo.2016.06.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Drapier E, Brun JF, Fédou C, Raynaud de Mauverger E. Synergie entre les effets amaigrissants de l’activité musculaire ciblée au LIPOXmax et d’un enrichissement modéré en protéines du blanc d’œuf. Sci Sports 2016. [DOI: 10.1016/j.scispo.2016.02.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Guiraudou M, Romain AJ, Mawunu M, Bedjih K, Fédou C, Brun JF. Effets chroniques de l’exercice ciblé au niveau d’oxydation maximale des lipides (LIPOXmax) sur le comportement alimentaire de sujets obèses sédentaires. Sci Sports 2016. [DOI: 10.1016/j.scispo.2015.09.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [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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Brun JF, Guiraudou M, Romain AJ, Pollatz M, Fédou C, Mercier J. Le niveau d’oxydation maximale des lipides (LIPOXmax), un niveau d’exercice adapté par ses propriétés énergétiques et comportementales au « génotype économe » du syndrome métabolique : l’hypothèse du « healthy primitive lifestyle ». Sci Sports 2015. [DOI: 10.1016/j.scispo.2015.01.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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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Brun JF, Romain A, Sferlazza A, Calas E, Fédou C, Raynaud de Mauverger E, Mercier J. P053: Quels sont les patients que l’activité physique fait grossir ? NUTR CLIN METAB 2014. [DOI: 10.1016/s0985-0562(14)70696-x] [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: 11/15/2022]
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Brun JF, Fédou C, Raynaud de Mauverger E. P140: Efficacité amaigrissante à 18 mois ans d’un enrichissement modéré en protéines comparé à un régime hypolipidique. NUTR CLIN METAB 2014. [DOI: 10.1016/s0985-0562(14)70782-4] [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: 10/24/2022]
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Brun JF, Fédou C, Raynaud de Mauverger E, Mercier J. P119: L’analyse modélisée de la glucorégulation dans les hypoglycémies réactionnelles confirme qu’elles sont principalement expliquées par une élévation de l’insulino-sensibilité. NUTR CLIN METAB 2014. [DOI: 10.1016/s0985-0562(14)70761-7] [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: 11/26/2022]
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Pollatz M, Guiraudou M, Romain AJ, Fédou C, Brun JF, Mercier J. Les effets d’un réentraînement de 45minutes au LIPOXmax sur le comportement alimentaire de patients obèses sont analogues le matin et l’après-midi. Sci Sports 2014. [DOI: 10.1016/j.scispo.2013.12.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Brun JF, Calas E, Sferlazza A, Guiraudou M, Romain AJ, Fédou C. P101 Efficacité sur 1 an de l’activité physique ciblée au LIPOXmax dans l’obésité. NUTR CLIN METAB 2013. [DOI: 10.1016/s0985-0562(13)70433-3] [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: 10/25/2022]
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Brun JF, Romain AJ, Pollatz M, Chevance G, Fédou C, Mercier J. P102 L’intensité spontanément sélectionnée pour un exercice prolongé se situe dans la zone d’oxydation lipidique maximale. NUTR CLIN METAB 2013. [DOI: 10.1016/s0985-0562(13)70434-5] [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: 12/01/2022]
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Brun JF, Marti B, Fédou C, Farré A, Renard E, Place J, Mercier J. La baisse de la glycémie à l’exercice en plateau chez le diabétique insuliné est déterminée par la glycémie de départ et l’insulinémie. Sci Sports 2012. [DOI: 10.1016/j.scispo.2011.09.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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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Brun JF, Fédou C, Raynaud de Mauverger E. P049 Un enrichissement modéré en protéines purifiées permet une perte de poids plus importante et plus prolongée qu’un régime hypolipidique chez des sujets obèses. NUTR CLIN METAB 2011. [DOI: 10.1016/s0985-0562(11)70116-9] [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: 10/14/2022]
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Brun JF, Fédou C, Mercier J. Exploration détaillée des composantes de la glycorégulation chez des sportifs sujets aux hypoglycémies d’effort. Intérêt de l’oral minimal model. Sci Sports 2011. [DOI: 10.1016/j.scispo.2011.04.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Brun JF, Halbeher C, Fédou C, Mercier J. Quelles sont les limites de normalité du LIPOXmax ? Peut-on le prédire sans effectuer de calorimétrie d’effort ? Sci Sports 2011. [DOI: 10.1016/j.scispo.2010.11.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [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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Lavault P, Deaux S, Romain AJ, Fédou C, Mercier J, Brun JF. Intérêt de la quantification de la masse musculaire pour interpréter la calorimétrie d’effort. Sci Sports 2011. [DOI: 10.1016/j.scispo.2010.12.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Soriano E, Pascual O, Fédou C, Brun JF. P4 - Oxydation des substrats énergétiques à l’effort dans l’anorexie mentale. Diabetes & Metabolism 2011. [DOI: 10.1016/s1262-3636(11)70630-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Romain AJ, Desplan M, Carayol M, Ninot G, Fédou C. O75 Effet d’un petit déjeûner sur le niveau maximal d’oxydation des lipides à l’exercice. Diabetes & Metabolism 2011. [DOI: 10.1016/s1262-3636(11)70563-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Brun JF, Fédou C, Grubka E, Karafiat M, Varlet-Marie E, Mercier J. Moindre utilisation des lipides à l’exercice chez le diabétique de type 1. Sci Sports 2008. [DOI: 10.1016/j.scispo.2007.12.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Bordenave S, Brandou F, Manetta J, Fédou C, Mercier J, Brun JF. Effects of acute exercise on insulin sensitivity, glucose effectiveness and disposition index in type 2 diabetic patients. Diabetes & Metabolism 2008; 34:250-7. [DOI: 10.1016/j.diabet.2007.12.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2007] [Revised: 11/16/2007] [Accepted: 12/03/2007] [Indexed: 10/22/2022]
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Fédou C, Fabre J, Baillat V, Reynes J, Brun J, Mercier J. Balance des substrats à l’exercice chez des patients infectés par le VIH 1 et présentant un syndrome lipodystrophique. Sci Sports 2008. [DOI: 10.1016/j.scispo.2007.12.015] [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: 11/25/2022]
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Bordenave S, Flavier S, Fédou C, Brun JF, Mercier J. Exercise calorimetry in sedentary patients: procedures based on short 3 min steps underestimate carbohydrate oxidation and overestimate lipid oxidation. Diabetes Metab 2007; 33:379-84. [PMID: 17936665 DOI: 10.1016/j.diabet.2007.04.003] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2007] [Accepted: 04/30/2007] [Indexed: 11/29/2022]
Abstract
OBJECTIVES Among exercise calorimetry tests designed for calculating the respective part of carbohydrates and lipids oxidized at exercise, some use 6 min steps and others use 3 min steps. Is this last method, which has been validated in healthy subjects, still accurate in very sedentary patients, who need more time to reach a steady state in respiratory gas exchanges? METHODS We compared data obtained with calorimetry (RER and indicators of substrate oxidation) performed on the 2nd-3rd min and the 5th-6th min of each step of a protocol using four 6-min submaximal steps in 17 sedentary subjects (mean age: 51 years) including seven type 2 diabetics and six obese persons. RESULTS Respiratory exchange ratio (RER) measured with the 3 min steps procedure are well correlated with the 6 min procedure in sedentary patients (r=0.928). However, a Bland-Altman analysis indicated an average underestimation of RER with 3 min steps (-0.0138). Moreover, we observed an average underestimation of carbohydrate oxidation rates of 70.1 mg/min with the 3 min steps procedure. On the contrary, as to lipid oxidation, we measured an average overestimation of 16.2 mg/min. Furthermore, carbohydrate and lipid oxidation rates measured with the 3 min steps procedure are well correlated with the 6 min steps procedure. Moreover, there was an average overestimation of the point at cross over with 3 min steps (+3.29 Watts). For lipox max point (power at which the increase in lipid oxidation induced by the increasing workload reaches a maximum), we observed an average underestimation with 3 min steps (-1.88 Watt). Although the differences between respectively mean values in cross over point and lipox max point between the two protocols are weak, a Bland-Altman analysis indicated more relevant discrepancies in many subjects between the two protocols. CONCLUSION In very sedentary patients undergoing such tests for targeting exercise prescription, the 3-min procedure appears to be too short for performing an accurate calorimetry and we rather recommend the protocol using 6-min steps.
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Affiliation(s)
- S Bordenave
- Service Central de Physiologie Clinique, Unité d'Exploration Métabolique (CERAMM), CHU Montpellier, Hôpital Lapeyronie et Inserm, Equipe ERI 25 Muscle et Pathologies, 34295, Montpellier Cedex 05, France
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Flavier S, Rolland MO, Eude M, Fédou C, Brun JF, Maire I, Mercier J, Raynaud E. [Late diagnosis of a McArdle disease's case (type V glycogenosis)]. Ann Biol Clin (Paris) 2007; 65:550-4. [PMID: 17913675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2007] [Accepted: 06/23/2007] [Indexed: 05/17/2023]
Abstract
McArdle's disease is a metabolic myopathy characterized by a myophosphorylase deficiency resulting in an inability to degrade glycogen stores. We report the case of a 48 years old patient who complained since adolescence of rest and exercise myalgias and presented a chronic increased plasma creatine kinase activity. First, a maximal exercise test was performed. This test demonstrated a quasi lack of rise of respiratory exchange ratio and of blood lactate, possibly due to a glycogenolytic/glycolytic pathway deficiency. Second, a biopsy of vastus lateralis muscle was performed using Bergström needle. As expected, the analysis of mitochondrial function was normal. The in vitro screening test of the glycogenolysis/glycolysis pathway showed a lack of lactate production in presence of glycogen substrate. The study of muscular metabolism of glycogen revealed a glycogen accumulation and a decrease of active and total phosphorylase activities. These data allowed us to diagnose a type V glycogenosis, or McArdle's disease. The patient appeared heterozygous for the most frequent mutation (p.R50X).
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Affiliation(s)
- S Flavier
- Service central de physiologie clinique, Unité d'exploration métabolique (CERAMM), Hôpital Lapeyronie, CHU de Montpellier et Inserm, équipe ERI 25 / EA 4202 Muscle et pathologies, Montpellier
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Jean E, Grubka E, Karafiat M, Flavier S, Fédou C, Mercier J, Brun JF. P1-155 - Effets d’un entraînement en endurance ciblé par la calorimétrie à l’effort chez des diabétiques de type 2. Annales d'Endocrinologie 2006. [DOI: 10.1016/s0003-4266(06)72808-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Brun JF, Raynaud E, Fédou C, Mercier J. P1-154 - Concordance de l’évaluation de l’insulino-sensibilité (SI), de l’insulinosécrétion (AIRG) et de l’efficience glucidique (SG) au cours de deux petits déjeuners tests de composition différente. Annales d'Endocrinologie 2006. [DOI: 10.1016/s0003-4266(06)72807-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Brandou F, Aloulou I, Razimbaud A, Fédou C, Mercier J, Brun JF. Lower ability to oxidize lipids in adult patients with growth hormone (GH) deficiency: reversal under GH treatment. Clin Endocrinol (Oxf) 2006; 65:423-8. [PMID: 16984232 DOI: 10.1111/j.1365-2265.2006.02578.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND The aim of the study was to characterize lipid oxidation at exercise in adults with growth hormone deficiency (GHD) and to evaluate the effect of 6 and 12 months of GH replacement therapy on substrate carbohydrate (CHO) and lipid utilization at exercise. PATIENTS AND MEASUREMENTS Twenty-five patients with GHD and 40 matched controls participated in the study. Ten of the 25 GH-deficient patients were treated with recombinant GH for 12 months. Anthropometric measurements and exercise calorimetry were performed before and after treatment. Maximal fat oxidation and the crossover point [that is the percentage of the theoretical maximal power (Wmax th) where CHO become the predominant fuel used for oxidation] were determined. RESULTS AND CONCLUSION The GH-deficient patients exhibited a highly significant shift in the balance of substrate oxidation during exercise, towards a decrease in fat oxidation, and a shift towards lower intensities of the crossover (52 +/- 5.5%vs. 72.6 +/- 6.6% of Wmax th, P < 0.03) and maximal fat oxidation (131.04 +/- 14 vs. 234.4 +/- 30.1 mg/min, P < 0.03) in the GHD and control groups, respectively. However, GH treatment at 6 and 12 months partially reversed this defect, resulting in an increase (+83%, P < 0.001) in the maximal ability to oxidize fat during exercise. These findings are consistent with the hypothesis that a lack of GH reduces the ability to oxidize lipids during exercise and that GH treatment restores this muscular metabolic property.
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Affiliation(s)
- F Brandou
- Service Central de Physiologie Clinique, Centre d'Exploration et de Réadaptation des Anomalies du Métabolisme Musculaire, CHU Montpellier, France.
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Thöni GJ, Lalande M, Bachelard G, Vidal P, Manificat S, Fédou C, Rodière M, Nicolas J. [Quality of life in HIV-infected children and adolescents under highly active antiretroviral therapy: change over time, effects of age and familial context]. Arch Pediatr 2005; 13:130-9. [PMID: 16364613 DOI: 10.1016/j.arcped.2005.01.038] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [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: 04/20/2004] [Accepted: 11/04/2005] [Indexed: 11/18/2022]
Abstract
OBJECTIVE To evaluate Quality of life (QoL) of HIV-infected children under highly active antiretroviral therapies, and its change over 18 months. MATERIALS AND METHODS QoL was evaluated by self-administred questionnaires (french versions of AUQUEI, OK-ado, and compilation of both) in 23 young living with HIV/AIDS (6-15 yrs), under antiretroviral multitherapies, and re-evaluated 18 months later in 19 of them. RESULTS At baseline, QoL in HIV-infected children-adolescents was relatively good. The answers given to each items and the mean score from infected children were similar to those obtained in uninfected healthy children. Moreover, infected adolescents distinguished definitly from healthy adolescents, describing higher QoL. The mean satisfaction score from the whole group decreased between M0 and M18 (mainly in the youngests), and mainly concerned 3 fields (self-esteem, health and school) while their somatic health remained stable or improved. An effect of the familial context was also observed for these 3 fields. CONCLUSION The progressive decline of QoL in HIV-infected children, and the surprising high and steady level of satisfaction over-time provided by the adolescents, underlined the frailty of this population and the need for a psychologic management associated to the medical follow-up. Such a multidisciplinary approach should take into account the preoccupations and difficulties of each age-class, those linked to the diagnosis itself, and to the familial or scolar contexts, in order to preserve QoL of this pediatric population, as far as possible, in a long term.
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Affiliation(s)
- G J Thöni
- Service de pédiatrie III, CHU A. de Villeneuve, 371, avenue du Doyen-Giraud, 34059 Montpellier, France.
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Aloulou I, Manetta J, Dumortier M, Brandou F, Varlet-Marie E, Fédou C, Mercier J, Brun JF. Effets en miroir de l'entraînement et du surentraînement sur la fonction somatotrope et la balance glucidolipidique à l'exercice. Sci Sports 2003. [DOI: 10.1016/j.scispo.2003.10.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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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Aïssa Benhaddad A, Monnier JF, Fédou C, Micallef JP, Brun JF. Insulin-like growth factor-binding protein 1 and blood rheology in athletes. Clin Hemorheol Microcirc 2003; 26:209-17. [PMID: 12082253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
The GH-IGF axis has been recently suggested to modulate blood rheology in trained athletes, via GH effects on body water status and a possible action of IGF-I on erythrocyte deformability and aggregability. Another potential candidate for such a rheologic effect of the GH-IGF axis is insulin-like growth factor binding protein-1 (IGF-BP1) which is increased in trained people and correlated to fitness: IGF-BP1 is elevated in patients with polycythemia vera and stimulates erythroid burst formation in vitro. We investigated the statistical relationships between IGF-BP1 and blood rheology in athletes. 21 soccer players, age 24.5+/-1.13 yr; body mass index 23.7+/-0.38 kg/m(2); VO2max 44.8+/-7 ml.min(-1).kg(-1)). The major statistical determinant of IGFBP1 (measured at rest after overnight fast) was age (r=0.752, p=0.00013) which was not correlated with rheological parameters. IGF BP1 was negatively correlated with blood viscosity eta (high shear rate r=-0.516, p=0.024) and positively correlated with the percentage of extracellular water in total body water (ECW/TBW) (r=0.488, p=0.039). The previously reported correlations between IGF-I and both eta (r=0.637, p=0.003) and red cell rigidity "Tk" (r=0.696, p=0.0137) were observed, but IGF-I and IGF-BP1 were not correlated to each other (r=-0.176 ns) and their correlations with eta and Tk appeared to be independent when studied by multivariate analysis. Consistent with these correlations, subjects in the upper tertile of IGF-BP1 (>23.4 ng/ml) compared to those in the lower (<7.5 ng/ml) had a higher percentage of ECW/TBW (40.8+/-0.4 vs 38+/-0.8%, p=0.033), a lower eta (2.7+/-0.05 vs 2.97+/-0.06 mPa.s, p=0.016), and a lower Tk (0.54+/-0.05 vs 0.63+/-0.01, p=0.027). Thus, beside GH and IGF-I, IGF-BP1, which is reported to act on erythroid progenitors, exhibits statistical relationships with blood fluidity and erythrocyte flexibility that may suggest a physiological role in improving blood rheology.
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Affiliation(s)
- A Aïssa Benhaddad
- Service Central de Physiologie Clinique, Centre d'Exploration et de Réadaptation de Anomalies du Métabolisme Musculaire, CHU Lapeyronie, Montipellier, France
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Manetta J, Brun JF, Maïmoun L, Fédou C, Préfaut C, Mercier J. The effects of intensive training on insulin-like growth factor I (IGF-I) and IGF binding proteins 1 and 3 in competitive cyclists: relationships with glucose disposal. J Sports Sci 2003; 21:147-54. [PMID: 12703844 DOI: 10.1080/0264041031000070895] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [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: 10/26/2022]
Abstract
The aim of the present study was to determine whether 4 months of intensified training would result in modified plasma insulin-like growth factor I (IGF-I), insulin-like growth factor binding protein 1 (IGFBP-1) or IGFBP-3 in eight competitive cyclists and eight sedentary individuals and to define the relationships of these factors with glucose disposal. Insulin sensitivity and glucose effectiveness--that is, the fractional disappearance of glucose independent of any change in insulinaemia--were measured with the minimal model (mathematical analysis of frequently sampled intravenous glucose tolerance test). Both glucose effectiveness and insulin sensitivity were higher in the cyclists than in the sedentary individuals, but did not increase further with training. IGF-I was higher in the cyclists than in the sedentary group only after raining (P < 0.05). Plasma IGFBP-1 and IGFBP-3 increased after training (38 and 20%, respectively; P < 0.05) in the cyclists and were higher than in the sedentary individuals (P < 0.05). IGF-I was negatively correlated with insulin sensitivity before and after training (r = -0.66 and -0.67, respectively; P < 0.05) and IGFBP-1 was negatively correlated with glucose effectiveness before andafter training (r = -0.68 and -0.77, respectively; P < 0.05). Our results show that strenuous endurance training improves the somatotrope axis (growth hormone-IGF) and that IGFBP-1 may be involved in glucose homeostasis, possibly by limiting the exercise-induced increase in glucose disposal, in competitive cyclists.
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Affiliation(s)
- J Manetta
- Service Central de Physiologie Clinique, Centre d'Exploration et de Réadaptation des Anomalies Métaboliques et Musculaires, Hôpital Lapeyronie, Montpellier, France.
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Abstract
DESIGN Growth hormone (GH) has demonstrated water-retaining effects in subjects at rest, whereas other research has indicated that GH may stimulate sweating. Thus, the aim of this study was to investigate the effect of fluid intake on the exercise-induced GH response. METHODS Seven healthy male volunteers (age: 27.4+/-1.3 years, weight: 74.5+/-1.1 kg, height: 179.3+/-2.3 cm) performed a 40-min submaximal rectangular cycling exercise in two different sessions. The first session (Session 1) was performed without water intake, and the second (Session 2) involved the ingestion of spring water (four intakes) corresponding to the volume of water lost during the first session. RESULTS In session 1, the water loss was 568+/-32 ml. In Session 2, the volume of water loss was not significantly different from the volume of fluid intake (524+/-16 versus 568+/-32 ml respectively). The decrease in plasma volume was significantly reduced in Session 2 (-6.69+/-1.59% versus -11.3+/-1.89%; P<0.05). In Session 1, the GH concentration was significantly lower than that during Session 2 after 25 min (3.04+/-1.05 versus 5.26+/-1.81; P<0.05) and after 40 min (13.7+/-3.55 versus 17.60+/-4.14 ng/ml; P<0.05) of exercise. The total GH response was significantly lower in Session 1 than in Session 2 (136.6+/-39.2 versus 202.4+/-58.9 ng/ml x min; P<0.05). CONCLUSIONS We conclude that the exercise-induced GH response decreases when exercise is performed without fluid intake.
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Affiliation(s)
- C Peyreigne
- Département de Physiologie, Laboratoire de Physiologie des Interactions, UPRES EA 701, Institut de Biologie, Faculté de Médecine, Boulevard Henri IV 34060 Montpellier, France.
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Pérez-Martin A, Dumortier M, Raynaud E, Brun JF, Fédou C, Bringer J, Mercier J. Balance of substrate oxidation during submaximal exercise in lean and obese people. Diabetes Metab 2001; 27:466-74. [PMID: 11547220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
OBJECTIVES To compare fat and carbohydrate oxidation at different exercise intensities between overweight and normal-weight subjects, in order to analyze the influence of muscular metabolic abnormalities in obese people on substrate utilization during exercise. MATERIAL AND METHODS 32 healthy sedentary overweight subjects (Body Mass Index (BMI): 30.8 +/- 0.8 kg/m(2); body fat: 37.4 +/- 1.1%; mean +/- SEM) and 26 controls (BMI: 23 +/- 0.4 kg/m(2); body fat: 22.7 +/- 1.1%) matched for age and sex were examined. The test consisted in four six-min. submaximal steady-state workloads with calculation of substrate oxidation rates and derived quantitative parameters, i.e., crossover point (defined as the power at which carbohydrate-derived energy becomes predominant) and maximal fat oxidation rate point. In addition, the accuracy of the test was analyzed and was found to be satisfactory. RESULTS While exercise intensities were similar in both group, fat oxidation rates were significantly lower in overweight group (p<0.05). The crossover and the maximal fat oxidation rate points were significantly lower in overweight subjects than in controls: 33.3 +/- 2 vs 50.1 +/- 3.4% and 30.5 +/- 2.3 vs 44.6 +/- 3.3% of maximal aerobic power, respectively (p<0.001). CONCLUSION Sedentary overweight subjects, compared to controls at the same exercise intensities, exhibited an alteration of the balance of substrate oxidation, reflected by lower rates of fat oxidation and a shift of quantitative parameters to lower intensities. The test appeared to be reliable and could be of interest to advise an individualized exercise prescription in obese people.
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Affiliation(s)
- A Pérez-Martin
- Service Central de Physiologie Clinique, Unité CERAMM, Centre d'Exploration et de Réadaptation des Anomalies Métaboliques et Musculaires, Cedex 5, France.
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Abstract
A relationship between plasma fibrinogen levels and insulinemia, as well as the different parameters of the insulin resistance syndrome has been described. The aim of the present paper was to investigate whether plasma fibrinogen concentrations were linked to plasma insulin levels or to the degree of insulin resistance. For this purpose, 62 nondiabetic, nonhypertensive patients, 30 men and 32 women, with body mass indexes (BMIs) and ages ranging from 18.6 to 50.2 kg/m(2) and from 19 to 60 years, respectively, were studied. Insulin sensitivity was quantified by the minimal model procedure over a 180-min intravenous glucose tolerance test with iterative sampling. Plasma insulin was determined by radioimmunoassay without cross-reactivity to human proinsulin, and fibrinogen by the method of Clauss. Insulin sensitivity ranged from 0.009 to 23.2 min(-1)/(microU/ml)x10(-4), covering the whole range of insulin sensitivities. Fibrinogen ranged from 1.70 to 5.07 g/l. There was a significant negative correlation between fibrinogen and insulin sensitivity (r=-0.76,P<0.0001) and a positive correlation between fibrinogen and basal insulin (r=0.56,P<0.0001). After adjustment for BMI, body fat mass and waist-to-hip ratio, these two relationships remained significant. In addition, a multiple regression analysis was performed to assess the independent effect of the following related variables: fibrinogen, insulin sensitivity, insulinemia and BMI. Only insulin sensitivity appeared to account for the ability to predict fibrinogen values. Thus, we hypothesized it was likely that the state of insulin resistance rather than hyperinsulinemia per se was related to hyperfibrinogenemia. We proposed an interpretation of these data in connection with some factors like free fatty acids or tumor necrosis factor-alpha, which have been implicated in the pathogenesis of insulin resistance. Nevertheless, prospective and intervention studies are needed to assess whether there is a simple association or a causal relationship between insulin resistance and hyperfibrinogenemia.
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Affiliation(s)
- E Raynaud
- Department of Metabolic and Clinical Biochemistry, Faculty of Pharmacy, 34060 cedex 2, Montpellier, France
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Peyreigne C, Fédou C, Benhaddad AA, de Boisvilliers F, Mercier J, Bringer J, Brun JF. Hemorheology of growth hormone-deficient adults. Clin Hemorheol Microcirc 1999; 20:167-74. [PMID: 10463840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
Growth hormone deficiency (GHD) in adults results in alterations of body composition and metabolism associated with a lowered insulin sensitivity and an increased cardiovascular risk. Since hemorheologic disturbances (putative factors of vascular risk) are found in the insulin-resistance syndrome, we investigated blood rheology in 9 adults GHDs (5 men, 4 women; age 37.9+/-4.7 years; body mass index 30.23+/-3.2 kg/m2) compared with 23 lean controls and 37 controls matched for sex, age and body mass index. While this sample of GHDs exhibits the typical metabolic picture of this syndrome (upper body overweight with a waist-to-hip ratio at 0.91+/-0.07; low HDL cholesterol at 1.07+/-0.09 mmol x l(-1); low insulin sensitivity with the minimal model technique at 3.3+/-1.29 min(-1)/(microU/ml) x 10(-4)) they have similar values of blood viscosity at either native or corrected hematocrit, similar hematocrit, similar red cell rigidity viscometric index, similar red cell aggregation parameters than overweight matched controls. There is only a nonsignificant tendency for plasma viscosity to be higher in GHDs: this tendency becomes significant when women are considered alone (GHDs: 1.44+/-0.04 mPa.s; controls: 1.31+/-0.04 mPa.s, p<0.05) while it is no longer found in men. This study suggests that GHDs exhibit the classical hemorheological disturbances of non-GHD individuals with the same degree of obesity. There is no evidence for a further impairment of blood rheology associated with the specific metabolic and endocrine pattern of GHDs that may be involved in their increased vascular risk.
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Affiliation(s)
- C Peyreigne
- Service Central de Physiologie Clinique, Centre d'Exploration et de Réadaptation des Anomalies du Métabolisme Musculaire, Montpellier, France
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Raynaud E, Pérez-Martin A, Brun JF, Fédou C, Mercier J. Insulin sensitivity measured with the minimal model is higher in moderately overweight women with predominantly lower body fat. Horm Metab Res 1999; 31:415-7. [PMID: 10450832 DOI: 10.1055/s-2007-978765] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Lower-body obesity is associated with a lower incidence of diabetes and high values of HDL2 cholesterol and thus seems to have a metabolic profile opposite to upper-body obesity. We measured insulin sensitivity by the minimal model procedure in 20 lower-body overweight women (age 40.3+/-2.3 years, waist-to-hip ratio WHR 0.75+/-0.01, body mass index BMI 29.9+/-0.7 kg/m2), compared to 18 women with a similar degree of upper-body obesity (age 40.4+/-3years, WHR 0.91+/-0.02, BMI 29.4+/-0.7 kg/m2) and 28 control women matched for age and height. Insulin sensitivity and basal insulin effect were higher in lower-body obesity (11.2+/-0.2 min-1/[microU/ml]x 10(-4) and 0.8+/-0.2 min(-1) x 10(-2), respectively) compared to upper-body obesity (2.6+/-0.4, p < 0.001 and 0.3+/-0.05, p < 0.01) and controls (6.1+/-0.7, p < 0.02 and 0.5+/-0.07, p < 0.02). It is suggested that lower-body obesity could be associated with a reduced free fatty acids-induced inhibition of insulin action by the Randle mechanism. This study confirms that body fat distribution is a more relevant determinant than obesity itself in the pathogenesis of insulin resistance. Contrary to upper-body obesity, moderate lower-body overweight seems to be associated with high values on insulin sensitivity.
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Affiliation(s)
- E Raynaud
- CERAMM, Centre Hospitalier Universitaire de Montpellier, Hôpital Lapeyronie, Montpellier, France
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Raynaud E, Brun JF, Fédou C, Puech-Cathala AM, Pérez-Martin A, Orsetti A. [Is microalbuminuria, an early marker of clinical nephropathy, also a cardiovascular risk factor?]. Ann Biol Clin (Paris) 1998; 56:671-9. [PMID: 9853026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Microalbuminuria is not only a predictor of diabetic nephropathy in type 1 diabetes, but also a potent marker of cardiovascular risk, especially in type 2 diabetes. Microalbuminuria also predicts cardiovascular morbidity in the general population. We describe semi-quantitative and quantitative methods for determination of low urinary excretion of albumin. Pathogenetic hypotheses common to both renal and endothelial dysfunction are discussed, suggesting that microalbuminuria may be a link between micro- and macroangiopathy. Improved glycemic control and antihypertensive treatment postpone and potentially prevent development of nephropathy in diabetic patients with microalbuminuria. These interventions must be instituted early in the development of diabetic nephropathy. In type 2 diabetes, prospective studies are needed to evaluate the precise impact of such a therapy on the cardiovascular risk.
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Affiliation(s)
- E Raynaud
- Unité d'exploration métabolique, Centre hospitalier universitaire, Hôpital Lapeyronie, Montpellier
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Raynaud E, Brun JF, Pérez-Martin A, Fédou C, Mercier J. [In vivo evaluation of insulin sensitivity and clinical applications]. Ann Biol Clin (Paris) 1998; 56:407-16. [PMID: 9754276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
During the past decade, the potential implications of insulin resistance were recognised by clinicians ranging from endocrinologists to cardiologists. Central to this expanding interest is Reaven's hypothesis that tissue resistance to the effects of insulin is a factor linking various metabolic disorders and coronary heart disease. This review critically describes the different approaches for the evaluation of insulin sensitivity in vivo. Qualities and limitations of several investigative techniques are discussed, such as anthropometric indexes, basal biological indexes, insulin suppression tests and insulin tolerance tests. The two most widely used methods for quantifying insulin sensitivity are the euglycaemic hyperinsulinaemic clamp and the intravenous glucose tolerance test with minimal model analysis. Insulin resistance occurs in many aetiologically diverse human disorders. Genetic syndromes with extreme insulin resistance are very uncommon. Insulin resistance is frequently associated with obesity, type 2 diabetes and essential hypertension. The insulin resistance syndrome called syndrome X includes impaired insulin-mediated glucose uptake, impaired glucose tolerance, hyperinsulinaemia, hypertension, dyslipidaemia and haemostatic disorders. Finally, the clinical significance of high values of insulin sensitivity is discussed.
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Affiliation(s)
- E Raynaud
- Centre hospitalier universitaire, Hôpital Lapeyronie, Montpellier
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Peyreigne C, Brun J, Monnier J, Abecassis M, Fédou C, Raynaud E, Orsetti A. Interactions entre la fonction somatotrope et l'activité musculaire. Sci Sports 1997. [DOI: 10.1016/s0765-1597(97)80063-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [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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Raynaud E, Fédou C, Brun JF, Solère M, Orsetti A. Taux sériques du propeptide aminoterminal du procollagène III chez des sportifs soumis à un entraînement régulier. Sci Sports 1997. [DOI: 10.1016/s0765-1597(97)87884-7] [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: 10/18/2022]
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Raynaud E, Fédou C, Solère M, Orsetti A. Physiologie de l'épitestostérone. Sci Sports 1997. [DOI: 10.1016/s0765-1597(97)80066-4] [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: 11/29/2022]
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Raynaud E, Brun J, Fédou C, Solère M, Orsetti A. Adrenocorticotropic hormone (ACTH) responsiveness to standardized exercise as a marker of neuroendocrine maturation during puberty? Sci Sports 1997. [DOI: 10.1016/s0765-1597(97)80071-8] [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: 11/15/2022]
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