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Leyrolle Q, Decoeur F, Briere G, Amadieu C, Quadros ARAA, Voytyuk I, Lacabanne C, Benmamar-Badel A, Bourel J, Aubert A, Sere A, Chain F, Schwendimann L, Matrot B, Bourgeois T, Grégoire S, Leblanc JG, De Moreno De Leblanc A, Langella P, Fernandes GR, Bretillon L, Joffre C, Uricaru R, Thebault P, Gressens P, Chatel JM, Layé S, Nadjar A. Maternal dietary omega-3 deficiency worsens the deleterious effects of prenatal inflammation on the gut-brain axis in the offspring across lifetime. Neuropsychopharmacology 2021; 46:579-602. [PMID: 32781459 PMCID: PMC8026603 DOI: 10.1038/s41386-020-00793-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 07/16/2020] [Accepted: 07/27/2020] [Indexed: 12/18/2022]
Abstract
Maternal immune activation (MIA) and poor maternal nutritional habits are risk factors for the occurrence of neurodevelopmental disorders (NDD). Human studies show the deleterious impact of prenatal inflammation and low n-3 polyunsaturated fatty acid (PUFA) intake on neurodevelopment with long-lasting consequences on behavior. However, the mechanisms linking maternal nutritional status to MIA are still unclear, despite their relevance to the etiology of NDD. We demonstrate here that low maternal n-3 PUFA intake worsens MIA-induced early gut dysfunction, including modification of gut microbiota composition and higher local inflammatory reactivity. These deficits correlate with alterations of microglia-neuron crosstalk pathways and have long-lasting effects, both at transcriptional and behavioral levels. This work highlights the perinatal period as a critical time window, especially regarding the role of the gut-brain axis in neurodevelopment, elucidating the link between MIA, poor nutritional habits, and NDD.
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Affiliation(s)
- Q. Leyrolle
- grid.488493.a0000 0004 0383 684XUniversity Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000 Bordeaux, France ,Université de Paris, NeuroDiderot, Inserm, F-75019 Paris, France
| | - F. Decoeur
- grid.488493.a0000 0004 0383 684XUniversity Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000 Bordeaux, France
| | - G. Briere
- grid.488493.a0000 0004 0383 684XUniversity Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000 Bordeaux, France ,grid.503269.b0000 0001 2289 8198CNRS, Bordeaux INP, LaBRI, UMR 5800, F-33400 Talence, France
| | - C. Amadieu
- grid.488493.a0000 0004 0383 684XUniversity Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000 Bordeaux, France
| | - A. R. A. A. Quadros
- grid.488493.a0000 0004 0383 684XUniversity Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000 Bordeaux, France
| | - I. Voytyuk
- grid.488493.a0000 0004 0383 684XUniversity Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000 Bordeaux, France
| | - C. Lacabanne
- grid.488493.a0000 0004 0383 684XUniversity Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000 Bordeaux, France
| | - A. Benmamar-Badel
- grid.488493.a0000 0004 0383 684XUniversity Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000 Bordeaux, France
| | - J. Bourel
- grid.488493.a0000 0004 0383 684XUniversity Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000 Bordeaux, France
| | - A. Aubert
- grid.488493.a0000 0004 0383 684XUniversity Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000 Bordeaux, France
| | - A. Sere
- grid.488493.a0000 0004 0383 684XUniversity Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000 Bordeaux, France
| | - F. Chain
- grid.460789.40000 0004 4910 6535Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - L. Schwendimann
- Université de Paris, NeuroDiderot, Inserm, F-75019 Paris, France
| | - B. Matrot
- Université de Paris, NeuroDiderot, Inserm, F-75019 Paris, France
| | - T. Bourgeois
- Université de Paris, NeuroDiderot, Inserm, F-75019 Paris, France
| | - S. Grégoire
- grid.462804.c0000 0004 0387 2525Centre des Sciences du Goût et de l’Alimentation, AgroSup Dijon, CNRS, INRAE, Université Bourgogne Franche-Comté, Dijon, France
| | - J. G. Leblanc
- CERELA-CONICET, San Miguel de Tucuman, 4000 Tucuman, Argentina
| | | | - P. Langella
- grid.460789.40000 0004 4910 6535Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - G. R. Fernandes
- Rene Rachou Institute – Oswaldo Cruz Foundation, Belo Horizonte, MG Brazil
| | - L. Bretillon
- grid.462804.c0000 0004 0387 2525Centre des Sciences du Goût et de l’Alimentation, AgroSup Dijon, CNRS, INRAE, Université Bourgogne Franche-Comté, Dijon, France
| | - C. Joffre
- grid.488493.a0000 0004 0383 684XUniversity Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000 Bordeaux, France
| | - R. Uricaru
- grid.503269.b0000 0001 2289 8198CNRS, Bordeaux INP, LaBRI, UMR 5800, F-33400 Talence, France
| | - P. Thebault
- grid.503269.b0000 0001 2289 8198CNRS, Bordeaux INP, LaBRI, UMR 5800, F-33400 Talence, France
| | - P. Gressens
- Université de Paris, NeuroDiderot, Inserm, F-75019 Paris, France ,grid.13097.3c0000 0001 2322 6764Centre for the Developing Brain, Department of Division of Imaging Sciences and Biomedical Engineering, King’s College London, King’s Health Partners, St. Thomas’ Hospital, London, SE1 7EH UK
| | - J. M. Chatel
- grid.460789.40000 0004 4910 6535Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - S. Layé
- grid.488493.a0000 0004 0383 684XUniversity Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000 Bordeaux, France
| | - A. Nadjar
- grid.488493.a0000 0004 0383 684XUniversity Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000 Bordeaux, France
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Dandurand J, Dantras E, Lacabanne C, Pepe A, Bochicchio B, Samouillan V. Thermal and dielectric fingerprints of self-assembling elastin peptides derived from exon30. AIMS Biophysics 2021. [DOI: 10.3934/biophy.2021018] [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: 11/18/2022] Open
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Madore C, Leyrolle Q, Morel L, Rossitto M, Greenhalgh AD, Delpech JC, Martinat M, Bosch-Bouju C, Bourel J, Rani B, Lacabanne C, Thomazeau A, Hopperton KE, Beccari S, Sere A, Aubert A, De Smedt-Peyrusse V, Lecours C, Bisht K, Fourgeaud L, Gregoire S, Bretillon L, Acar N, Grant NJ, Badaut J, Gressens P, Sierra A, Butovsky O, Tremblay ME, Bazinet RP, Joffre C, Nadjar A, Layé S. Essential omega-3 fatty acids tune microglial phagocytosis of synaptic elements in the mouse developing brain. Nat Commun 2020; 11:6133. [PMID: 33257673 PMCID: PMC7704669 DOI: 10.1038/s41467-020-19861-z] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 11/03/2020] [Indexed: 12/23/2022] Open
Abstract
Omega-3 fatty acids (n-3 PUFAs) are essential for the functional maturation of the brain. Westernization of dietary habits in both developed and developing countries is accompanied by a progressive reduction in dietary intake of n-3 PUFAs. Low maternal intake of n-3 PUFAs has been linked to neurodevelopmental diseases in Humans. However, the n-3 PUFAs deficiency-mediated mechanisms affecting the development of the central nervous system are poorly understood. Active microglial engulfment of synapses regulates brain development. Impaired synaptic pruning is associated with several neurodevelopmental disorders. Here, we identify a molecular mechanism for detrimental effects of low maternal n-3 PUFA intake on hippocampal development in mice. Our results show that maternal dietary n-3 PUFA deficiency increases microglia-mediated phagocytosis of synaptic elements in the rodent developing hippocampus, partly through the activation of 12/15-lipoxygenase (LOX)/12-HETE signaling, altering neuronal morphology and affecting cognitive performance of the offspring. These findings provide a mechanistic insight into neurodevelopmental defects caused by maternal n-3 PUFAs dietary deficiency.
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Affiliation(s)
- C Madore
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000, Bordeaux, France
- Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women´s Hospital, Harvard Medical School, Boston, MA, USA
| | - Q Leyrolle
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000, Bordeaux, France
- NeuroDiderot, Inserm, Université de Paris Diderot, F-75019, Paris, France
| | - L Morel
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000, Bordeaux, France
| | - M Rossitto
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000, Bordeaux, France
| | - A D Greenhalgh
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000, Bordeaux, France
| | - J C Delpech
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000, Bordeaux, France
| | - M Martinat
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000, Bordeaux, France
| | - C Bosch-Bouju
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000, Bordeaux, France
| | - J Bourel
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000, Bordeaux, France
| | - B Rani
- Department of Health Sciences, University of Florence, Florence, Italy
| | - C Lacabanne
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000, Bordeaux, France
| | - A Thomazeau
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000, Bordeaux, France
| | - K E Hopperton
- Department of Nutritional Sciences, University of Toronto, Toronto, ON, M5S 3E2, Canada
| | - S Beccari
- Achucarro Basque Center for Neuroscience, University of the Basque Country and Ikerbasque Foundation, 48940, Leioa, Spain
| | - A Sere
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000, Bordeaux, France
| | - A Aubert
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000, Bordeaux, France
| | - V De Smedt-Peyrusse
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000, Bordeaux, France
| | - C Lecours
- Neurosciences Axis, CRCHU de Québec-Université Laval, Québec City, QC, Canada
| | - K Bisht
- Neurosciences Axis, CRCHU de Québec-Université Laval, Québec City, QC, Canada
| | - L Fourgeaud
- Molecular Neurobiology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA, 92037, USA
| | - S Gregoire
- Centre des Sciences du Goût et de l'Alimentation, AgroSup Dijon, CNRS, INRAE, Univ. Bourgogne Franche-Comté, F-21000, Dijon, France
| | - L Bretillon
- Centre des Sciences du Goût et de l'Alimentation, AgroSup Dijon, CNRS, INRAE, Univ. Bourgogne Franche-Comté, F-21000, Dijon, France
| | - N Acar
- Centre des Sciences du Goût et de l'Alimentation, AgroSup Dijon, CNRS, INRAE, Univ. Bourgogne Franche-Comté, F-21000, Dijon, France
| | - N J Grant
- CNRS UPR3212, Institut des Neurosciences Cellulaires et Intégratives, Strasbourg, France
| | - J Badaut
- CNRS UMR5287, University of Bordeaux, Bordeaux, France
| | - P Gressens
- NeuroDiderot, Inserm, Université de Paris Diderot, F-75019, Paris, France
- Centre for the Developing Brain, Department of Division of Imaging Sciences and Biomedical Engineering, King's College London, King's Health Partners, St. Thomas' Hospital, London, SE1 7EH, UK
| | - A Sierra
- Achucarro Basque Center for Neuroscience, University of the Basque Country and Ikerbasque Foundation, 48940, Leioa, Spain
| | - O Butovsky
- Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women´s Hospital, Harvard Medical School, Boston, MA, USA
- Evergrande Center for Immunologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - M E Tremblay
- Neurosciences Axis, CRCHU de Québec-Université Laval, Québec City, QC, Canada
| | - R P Bazinet
- Department of Nutritional Sciences, University of Toronto, Toronto, ON, M5S 3E2, Canada
| | - C Joffre
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000, Bordeaux, France
| | - A Nadjar
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000, Bordeaux, France.
| | - S Layé
- Univ. Bordeaux, INRAE, Bordeaux INP, NutriNeuro, UMR 1286, F-33000, Bordeaux, France.
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Henri V, Dantras E, Lacabanne C, Dieudonne A, Koliatene F. Thermal ageing of PTFE in the melted state: Influence of interdiffusion on the physicochemical structure. Polym Degrad Stab 2020. [DOI: 10.1016/j.polymdegradstab.2019.109053] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [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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Samouillan V, Tang R, Dandurand J, Lacabanne C, Lacoste-Ferré MH, Villaret A, Nadal-Wollbold F, Schmitt AM. Chain dynamics of human dermis by Thermostimulated currents: A tool for new markers of aging. Skin Res Technol 2018; 25:12-19. [PMID: 29797593 DOI: 10.1111/srt.12588] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/28/2018] [Indexed: 11/28/2022]
Abstract
BACKGROUND/PURPOSE The purpose of this clinical study was to identify dielectric markers to complete a previous thermal and vibrational study on the molecular and organizational changes in human dermis during intrinsic and extrinsic aging. METHODS Sun-exposed and non-exposed skin biopsies were collected from 28 women devised in two groups (20-30 and ≥60 years old). The dielectric relaxation modes associated with localized and delocalized dynamics in the fresh and dehydrated state were determined by the Thermostimulated currents technique (TSC). RESULTS Intrinsic and extrinsic aging induced significant evolution of some of the dielectric parameters of localized and delocalized dynamics of human skin. With photo-aging, freezable water forms a segregated phase in dermis and its dynamics is close to free water, what evidences the major role of extrinsic aging on water organization in human skin. Moreover, TSC indicators highlight the restriction of localized mobility with intrinsic aging due to glycation, and the cumulative effect of chronological aging and photo-exposition on the molecular mobility of the main structural proteins of the dermis at the mesoscopic scale. CONCLUSION TSC is a well-suited technique to scan the molecular mobility of human skin. It can be uses as a relevant complement of vibrational and thermal characterization to follow human skin modifications with intrinsic and extrinsic aging.
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Affiliation(s)
- V Samouillan
- CIRIMAT UMR 5085, Université de Toulouse, Université Paul Sabatier, Toulouse, Cedex, France
| | - R Tang
- CIRIMAT UMR 5085, Université de Toulouse, Université Paul Sabatier, Toulouse, Cedex, France
| | - J Dandurand
- CIRIMAT UMR 5085, Université de Toulouse, Université Paul Sabatier, Toulouse, Cedex, France
| | - C Lacabanne
- CIRIMAT UMR 5085, Université de Toulouse, Université Paul Sabatier, Toulouse, Cedex, France
| | - M-H Lacoste-Ferré
- CIRIMAT UMR 5085, Université de Toulouse, Université Paul Sabatier, Toulouse, Cedex, France
| | - A Villaret
- Pierre Fabre Dermo-Cosmetique, Toulouse, Cedex, France
| | | | - A-M Schmitt
- Pierre Fabre Dermo-Cosmetique, Toulouse, Cedex, France
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Tang R, Samouillan V, Dandurand J, Lacabanne C, Lacoste-Ferre MH, Bogdanowicz P, Bianchi P, Villaret A, Nadal-Wollbold F. Identification of ageing biomarkers in human dermis biopsies by thermal analysis (DSC) combined with Fourier transform infrared spectroscopy (FTIR/ATR). Skin Res Technol 2017; 23:573-580. [DOI: 10.1111/srt.12373] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/12/2017] [Indexed: 01/05/2023]
Affiliation(s)
- R. Tang
- CIRIMAT; Paul Sabatier University; Toulouse France
| | | | - J. Dandurand
- CIRIMAT; Paul Sabatier University; Toulouse France
| | - C. Lacabanne
- CIRIMAT; Paul Sabatier University; Toulouse France
| | | | | | - P. Bianchi
- Pierre Fabre Dermo Cosmetique; Toulouse France
| | - A. Villaret
- Pierre Fabre Dermo Cosmetique; Toulouse France
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Samouillan V, Revuelta-López E, Soler-Botija C, Dandurand J, Benitez-Amaro A, Nasarre L, de Gonzalo-Calvo D, Bayes-Genis A, Lacabanne C, Llorente-Cortés V. Conformational and thermal characterization of left ventricle remodeling post-myocardial infarction. Biochim Biophys Acta Mol Basis Dis 2017; 1863:1500-1509. [PMID: 28245984 DOI: 10.1016/j.bbadis.2017.02.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [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: 10/27/2016] [Revised: 02/05/2017] [Accepted: 02/24/2017] [Indexed: 11/25/2022]
Abstract
Adverse cardiac remodeling after myocardial infarction (MI) causes impaired ventricular function and heart failure. Histopathological characterization is commonly used to detect the location, size and shape of MI sites. However, the information about chemical composition, physical structure and molecular mobility of peri- and infarct zones post-MI is rather limited. The main objective of this work was to explore the spatiotemporal biochemical and biophysical alterations of key cardiac components post-MI. The FTIR spectra of healthy and remote myocardial tissue shows amides A, I, II and III associated with proteins in freeze-died tissue as major absorptions bands. In infarcted myocardium, the spectrum of these main absorptions was deeply altered. FITR evidenced an increase of the amide A band and the distinct feature of the collagen specific absorption band at 1338cm-1 in the infarct area at 21days post-MI. At 21days post-MI, it also appears an important shift of amide I from 1646cm-1 to 1637cm-1 that suggests the predominance of the triple helical conformation in the proteins. The new spectra bands also indicate an increase in proteoglycans, residues of carbohydrates in proteins and polysaccharides in ischemic areas. Thermal analysis indicates a deep increase of unfreezable water/freezable water in peri- and infarcted tissues. In infarcted tissue is evidenced the impairment of myofibrillar proteins thermal profile and the emergence of a new structure. In conclusion, our results indicate a profound evolution of protein secondary structures in association with collagen deposition and reorganization of water involved in the scar maturation of peri- and infarct zones post-MI.
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Affiliation(s)
- V Samouillan
- Physique des Polymères, Institut Carnot, CIRIMAT UMR 5085, Université Paul Sabatier, Bat 3R1B2, 118 route de Narbonne, 31062 Toulouse Cedex 04, France.
| | - E Revuelta-López
- Cardiovascular Research Center, CSIC-ICCC, IIB-Sant Pau, Hospital de la Santa Creu i Sant Pau, 08025 Barcelona, Spain; ICREC (Heart Failure and Cardiac Regeneration) Research Program, Health Sciences Research Institute Germans Trias i Pujol, 08916 Badalona, Barcelona, Spain
| | - C Soler-Botija
- ICREC (Heart Failure and Cardiac Regeneration) Research Program, Health Sciences Research Institute Germans Trias i Pujol, 08916 Badalona, Barcelona, Spain; CIBERCV, Instituto de Salud Carlos III, Madrid, Spain
| | - J Dandurand
- Physique des Polymères, Institut Carnot, CIRIMAT UMR 5085, Université Paul Sabatier, Bat 3R1B2, 118 route de Narbonne, 31062 Toulouse Cedex 04, France
| | - Aleyda Benitez-Amaro
- Cardiovascular Research Center, CSIC-ICCC, IIB-Sant Pau, Hospital de la Santa Creu i Sant Pau, 08025 Barcelona, Spain
| | - L Nasarre
- Cardiovascular Research Center, CSIC-ICCC, IIB-Sant Pau, Hospital de la Santa Creu i Sant Pau, 08025 Barcelona, Spain
| | - D de Gonzalo-Calvo
- Cardiovascular Research Center, CSIC-ICCC, IIB-Sant Pau, Hospital de la Santa Creu i Sant Pau, 08025 Barcelona, Spain; CIBERCV, Instituto de Salud Carlos III, Madrid, Spain
| | - A Bayes-Genis
- ICREC (Heart Failure and Cardiac Regeneration) Research Program, Health Sciences Research Institute Germans Trias i Pujol, 08916 Badalona, Barcelona, Spain; CIBERCV, Instituto de Salud Carlos III, Madrid, Spain; Cardiology Service, Germans Trias i Pujol University Hospital, Badalona, Spain; Department of Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - C Lacabanne
- Physique des Polymères, Institut Carnot, CIRIMAT UMR 5085, Université Paul Sabatier, Bat 3R1B2, 118 route de Narbonne, 31062 Toulouse Cedex 04, France
| | - V Llorente-Cortés
- Cardiovascular Research Center, CSIC-ICCC, IIB-Sant Pau, Hospital de la Santa Creu i Sant Pau, 08025 Barcelona, Spain; CIBERCV, Instituto de Salud Carlos III, Madrid, Spain; Institute of Biomedical Research of Barcelona (IIBB) - Spanish National Research Council (CSIC), Barcelona, Spain.
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Giraud I, Franceschi S, Perez E, Lacabanne C, Dantras E. Original Preparation of PEKK Dispersion for Coating by Transfer from a Chloroform Stable Dispersion to an Aqueous Stable Dispersion, by Emulsion/Solvent Evaporation. J DISPER SCI TECHNOL 2015. [DOI: 10.1080/01932691.2015.1025136] [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: 10/23/2022]
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Samouillan V, Dandurand J, Lacabanne C, Stella A, Gargiulo M, Degani A, Gandaglia A, Spina M. Analysis of the molecular mobility of collagen and elastin in safe, atheromatous and aneurysmal aortas. ACTA ACUST UNITED AC 2011; 60:58-65. [PMID: 22169773 DOI: 10.1016/j.patbio.2011.11.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2011] [Accepted: 10/30/2011] [Indexed: 11/19/2022]
Abstract
AIM OF THE STUDY In this study, we propose to use a thermal technique, Differential Scanning Calorimetry (DSC) to follow the evolution of elastin and collagen in safe and pathological cardiovascular tissues. PATIENTS AND METHODS The first part of this study deals with the analysis of the elastin network and associated proteins during ageing (from children to old persons) in aortic walls. The second part is devoted to the characterization of the collagenic phase in aneurysms. In both cases, physical data are correlated with biochemical analyses. RESULTS AND CONCLUSION For old persons aortas with atheromatous stades, elastin and associated proteins are found to interpenetrate to form a homogenous phase. Abdominal aortic aneurysms (AAA) are characterized by structural alterations of the aortic wall resulting from the degradation of elastic fibers and an increase of collagen/elastin ratio. Notable modifications are evidenced between collagen from control tissue and collagen from AAA, particularly concerning the thermal denaturation. Biochemical and thermal results are compatible with the increase of new collagen deposition and/or impairment of the collagen phase stability in the extracellular matrix of AAAs.
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Affiliation(s)
- V Samouillan
- Physique des polymères, BAT 3R1B2, institut Carnot, CIRIMAT UMR 5085, université Paul-Sabatier, 118, route de Narbonne, 31062 Toulouse cedex 9, France.
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Lacoste-Ferré MH, Demont P, Dandurand J, Dantras E, Duran D, Lacabanne C. Dynamic mechanical properties of oral mucosa: Comparison with polymeric soft denture liners. J Mech Behav Biomed Mater 2010; 4:269-74. [PMID: 21316614 DOI: 10.1016/j.jmbbm.2010.10.005] [Citation(s) in RCA: 19] [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: 01/27/2010] [Revised: 10/12/2010] [Accepted: 10/12/2010] [Indexed: 11/29/2022]
Abstract
The purpose of this work was to characterize the viscoelastic behaviour of oral mucosa and compare it with the dynamic mechanical properties of different soft liners. For this purpose, a sample of pig oral mucosa and six commercialized soft liner samples have been investigated. A comparison was also carried with the first suitable hard rubber for dental prosthetics: vulcanite. Creep recovery (CR) and dynamic mechanical analysis (DMA) have been used to determine the mechanical modulus of oral mucosa and soft liners respectively. The Poisson ratio is used to compare mucosa bulk modulus and soft liner shear modulus. The biomechanical concept of conventional complete dentures needs a good adjustment of dynamic mechanical impedance between the base and oral mucosa. The viscoelastic mechanical property of the oral mucosa as a referent biopolymer has been confirmed in vitro. The modulus value, adjusted for old patients in physiological conditions, is in the order of 3 MPa. This study underlines the plasticization effect of absorbed water on the mechanical properties of the underlying tissue. This study allows us to define some characteristics of the most adapted biomaterial according to the clinical exigency. The required biomaterial must display the following properties: compatibility and chemical resistance with biological environment perpetuated mechanical properties during physiological conditions and clinical use, good adjustment of dynamic mechanical impedance with supporting mucosa and easy sample processing.
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Affiliation(s)
- M-H Lacoste-Ferré
- Physique des Polymères, CIRIMAT, Institut Carnot, Université Paul Sabatier, 118 route de Narbonne, 31062 Toulouse Cedex, France
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Chevalier M, Dantras E, Tonon C, Guigue P, Lacabanne C, Puig C, Durin C. Correlation between sub-Tgrelaxation processes and mechanical behavior for different hydrothermal ageing conditions in epoxy assemblies. J Appl Polym Sci 2010. [DOI: 10.1002/app.31253] [Citation(s) in RCA: 7] [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: 11/06/2022]
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Tintar D, Samouillan V, Dandurand J, Lacabanne C, Pepe A, Bochicchio B, Tamburro AM. Human tropoelastin sequence: dynamics of polypeptide coded by exon 6 in solution. Biopolymers 2009; 91:943-52. [PMID: 19603496 DOI: 10.1002/bip.21282] [Citation(s) in RCA: 8] [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: 11/12/2022]
Abstract
Calorimetric studies were performed on exon 6 in powdered form and in solution [water and 2,2,2-trifluoroethanol (TFE), a structure-inducing solvent or cosolvent]. Dynamic dielectric spectroscopy (DDS) analyses were realized in water and 20% TFE. The major role of solvent-peptide organization is evidenced with these techniques. Calorimetric measurements reveal the structural water organization around the polypeptide as well as the presence of hydrophobic interactions in TFE solution. Dielectric measurements showed for exon 6/water a decrease of relaxations times of bulk solvent implying a faster dynamics with a slight increase of the activation entropy, suggesting that exon 6 probably creates disorder within the solvent. For TFE/water mixtures, an influence of exon 6 on its environment was seen with a relaxation associated with the exon 6/solvent interactions reinforced by storage of 72 h. Finally, exon 6/solvent interactions were clearly observed with addition of TFE.
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Affiliation(s)
- D Tintar
- Laboratoire de Physique des Polymères, CIRIMAT UMR 5085, Institut Carnot, Université Paul Sabatier, Toulouse, France
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Sender C, Dantras E, Dantras-Laffont L, Lacoste MH, Dandurand J, Mauzac M, Lacout JL, Lavergne C, Demont P, Bernès A, Lacabanne C. Dynamic mechanical properties of a biomimetic hydroxyapatite/polyamide 6,9 nanocomposite. J Biomed Mater Res B Appl Biomater 2007; 83:628-35. [PMID: 17806121 DOI: 10.1002/jbm.b.30930] [Citation(s) in RCA: 17] [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: 11/08/2022]
Abstract
A biomimetic composite of nanohydroxyapatite (nHap) and semicrystalline polyamide 6,9 (PA 6,9) was synthesized by thermally induced phase separation. The nHap powder was dispersed in a polymer matrix with a low ratio ranging 1-10 wt %. The mean size of the nHap, determined by scanning electron microscopy (SEM) was approximately 100-200 nm (length), 40-60 nm (width). Physicochemical analyses were performed in order to characterize the PA 6,9 and nHap separately on the one hand, and the PA 6,9/nHap composites on the other hand. Differential scanning calorimetry (DSC) and dynamic mechanical analyses (DMA) have pointed out an optimization of the composite physical properties as a function of nHap content till a limit value of 5 wt %. Above this value, the mechanical properties decreased. Four main parameters have been found to influence the composite physical properties improvement: the fillers content, the physical structure of the polymeric matrix, the particles dispersion and the physical interaction strength between organic and inorganic phases. The dynamic mechanical properties of this biomimetic nanocomposite were compared with human cortical bone.
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Affiliation(s)
- C Sender
- L2P, Institut CARNOT-CIRIMAT, Université Paul Sabatier, 31062 Toulouse, France
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Delbreilh L, Dargent E, Grenet J, Saiter JM, Bernès A, Lacabanne C. Study of poly(bisphenol A carbonate) relaxation kinetics at the glass transition temperature. Eur Polym J 2007. [DOI: 10.1016/j.eurpolymj.2006.09.019] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [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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Affiliation(s)
- K. Nishinari
- a Laboratoire de Physique des Solides associé au , CNRS Université Paul Sabatier , Toulouse Cédex, 31062, France
- b Laboratory of Food Rheology , National Food Research Institute, Ministry of Agriculture. Forestry, and Fisheries , Tsukuba, Ibaraki, Japan , 305
| | - D. Chatain
- a Laboratoire de Physique des Solides associé au , CNRS Université Paul Sabatier , Toulouse Cédex, 31062, France
| | - C. Lacabanne
- a Laboratoire de Physique des Solides associé au , CNRS Université Paul Sabatier , Toulouse Cédex, 31062, France
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Chafa A, Chatain D, Dugas J, Lacabanne C, Vayssi E. Modification of glass transition and liquid—liquid transition in PMMA doped with fluorescent dyes. J MACROMOL SCI B 2006. [DOI: 10.1080/00222348308245747] [Citation(s) in RCA: 6] [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: 10/23/2022]
Affiliation(s)
- A. Chafa
- a Laboratoire de Physique des Solides associé au , NRS Université Paul Sabatier , 31062, Toulouse Cédex, France
| | - D. Chatain
- a Laboratoire de Physique des Solides associé au , NRS Université Paul Sabatier , 31062, Toulouse Cédex, France
| | - J. Dugas
- a Laboratoire de Physique des Solides associé au , NRS Université Paul Sabatier , 31062, Toulouse Cédex, France
| | - C. Lacabanne
- a Laboratoire de Physique des Solides associé au , NRS Université Paul Sabatier , 31062, Toulouse Cédex, France
| | - E. Vayssi
- a Laboratoire de Physique des Solides associé au , NRS Université Paul Sabatier , 31062, Toulouse Cédex, France
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Barandiarán JM, Del Val JJ, Colmenero J, Lacabanne C, Chatain D, Millán J, Martínez G. Thermally stimulated currents in poly(vinyl chloride): Tacticity and molecular weight influence. J MACROMOL SCI B 2006. [DOI: 10.1080/00222348308245748] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- J. M. Barandiarán
- a Departamento de Física Facultad de Ciencias Químicas Alza , San Sebastián, Spain
| | - J. J. Del Val
- a Departamento de Física Facultad de Ciencias Químicas Alza , San Sebastián, Spain
| | - J. Colmenero
- a Departamento de Física Facultad de Ciencias Químicas Alza , San Sebastián, Spain
| | - C. Lacabanne
- b Laboratoire de Physique des Solides associé au CNRS Université , Paul Sabatier Cedex, 31062, France
| | - D. Chatain
- b Laboratoire de Physique des Solides associé au CNRS Université , Paul Sabatier Cedex, 31062, France
| | - J. Millán
- c Instituto de Plásticos y Caucho , CSIC Juan de la Cierva 3, Madrid, Spain
| | - G. Martínez
- c Instituto de Plásticos y Caucho , CSIC Juan de la Cierva 3, Madrid, Spain
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Lamarre L, Schreiber HP, Wertheimer MR, Chatain D, Lacabanne C. Study of multiple relaxations in methacrylic polymers by thermally stimulated current and creep. J MACROMOL SCI B 2006. [DOI: 10.1080/00222348008241378] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- L. Lamarre
- a Departments of Engineering Physics and Chemical Engineering , Ecole Polytechnique , Box 6079, Station A Montreal, P. Q., H3C 3A7, Canada
| | - H. P. Schreiber
- a Departments of Engineering Physics and Chemical Engineering , Ecole Polytechnique , Box 6079, Station A Montreal, P. Q., H3C 3A7, Canada
| | - M. R. Wertheimer
- a Departments of Engineering Physics and Chemical Engineering , Ecole Polytechnique , Box 6079, Station A Montreal, P. Q., H3C 3A7, Canada
| | - D. Chatain
- b Laboratoire de Physique des Solides , Universite Paul Sabatier , 118 route de Narbonne, 31077, Toulouse Cedex, France
| | - C. Lacabanne
- b Laboratoire de Physique des Solides , Universite Paul Sabatier , 118 route de Narbonne, 31077, Toulouse Cedex, France
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Affiliation(s)
- K. Nishinari
- b Laboratory of Food Rheology , National Food Research Institute , Tsukuba, Ibaraki, 305, Japan
| | - D. Chatain
- a Laboratoire de Physique des Solides, Associé au CNRS , Université Paul Sabatier , 31062, Toulouse, Cédex, France
| | - C. Lacabanne
- a Laboratoire de Physique des Solides, Associé au CNRS , Université Paul Sabatier , 31062, Toulouse, Cédex, France
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Lacabanne C, Chatain DG, Monpagens JC. Experimental resolution of the retardation time spectrum in polymeric solids by a new method: Thermostimulated creep. J MACROMOL SCI B 2006. [DOI: 10.1080/00222347708212208] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- C. Lacabanne
- a Laboratoire de Physique des Solides , Associé au C.N.R.S. Université Paul Sabatier , 31077, Toulouse Cédex, France
| | - D. G. Chatain
- a Laboratoire de Physique des Solides , Associé au C.N.R.S. Université Paul Sabatier , 31077, Toulouse Cédex, France
| | - J. C. Monpagens
- a Laboratoire de Physique des Solides , Associé au C.N.R.S. Université Paul Sabatier , 31077, Toulouse Cédex, France
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Jarrigeon M, Chabert B, Chatain D, Lacabanne C, Nemoz G. Multiple transitions in isotactic polypropylene around and above the glass transition. J MACROMOL SCI B 2006. [DOI: 10.1080/00222348008212795] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- M. Jarrigeon
- a Laboratoires de Chimie Macromoléculaire et de Synthése Minérale , Université Claude Bernard Lyon , Villeurbanne, I-69621, France
| | - B. Chabert
- a Laboratoires de Chimie Macromoléculaire et de Synthése Minérale , Université Claude Bernard Lyon , Villeurbanne, I-69621, France
| | - D. Chatain
- b Laboratoire de Physique du Solide Université Paul Sabatier , Toulouse, Cedex, 31077, France
| | - C. Lacabanne
- b Laboratoire de Physique du Solide Université Paul Sabatier , Toulouse, Cedex, 31077, France
| | - G. Nemoz
- c Institut Textile de France , Section Lyon BP 60, Chemin des Mouilles, Ecully, 69130, France
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Affiliation(s)
- C. Lacabanne
- a Laboratoire de Physique des Solides Université Paul Sabatier , 31077, Toulouse Cedex, France
| | - D. Chatain
- a Laboratoire de Physique des Solides Université Paul Sabatier , 31077, Toulouse Cedex, France
| | - J. C. Monpagens
- a Laboratoire de Physique des Solides Université Paul Sabatier , 31077, Toulouse Cedex, France
| | - A. Hiltner
- b Department of Macromolecular Science , Case Western Reserve University , Cleveland, Ohio, 44106
| | - E. Baer
- b Department of Macromolecular Science , Case Western Reserve University , Cleveland, Ohio, 44106
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Affiliation(s)
- J. C. Monpagens
- a Laboratoire de Physique des Solides Université Paul Sabatier , 31077, Toulouse Cedex, France
| | - C. Lacabanne
- a Laboratoire de Physique des Solides Université Paul Sabatier , 31077, Toulouse Cedex, France
| | - D. Chatain
- a Laboratoire de Physique des Solides Université Paul Sabatier , 31077, Toulouse Cedex, France
| | - A. Hiltner
- b Department of Macromolecular Science , Case Western Reserve University , Cleveland, Ohio, 44106
| | - E. Baer
- b Department of Macromolecular Science , Case Western Reserve University , Cleveland, Ohio, 44106
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Affiliation(s)
- P. Berticat
- a Laboratoire de Chimie Macromoléculaire Associé , au C.N.R.S. 199, 69621, Villeurbanne, France
| | - D. Chatain
- b Laboratoire de Physique des Solides Associé , au C.N.R.S. 74 Université Paul Sabatier, 31077, Toulouse Cédex, France
| | - J. C. Monpagens
- b Laboratoire de Physique des Solides Associé , au C.N.R.S. 74 Université Paul Sabatier, 31077, Toulouse Cédex, France
| | - C. Lacabanne
- b Laboratoire de Physique des Solides Associé , au C.N.R.S. 74 Université Paul Sabatier, 31077, Toulouse Cédex, France
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Delbreilh L, Bernès A, Lacabanne C. Secondary Retardation/Relaxation Processes in Bisphenol A Polycarbonate: Thermostimulated Creep and Dynamic Mechanical Analysis Combined Investigations. International Journal of Polymer Analysis and Characterization 2005. [DOI: 10.1080/10236660500345885] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Dantras E, Dandurand J, Lacabanne C, Caminade AM, Majoral JP. TSC and Broadband Dielectric Spectroscopy Studies of the α Relaxation in Phosphorus-Containing Dendrimers. Macromolecules 2004. [DOI: 10.1021/ma049955i] [Citation(s) in RCA: 17] [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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Alie J, Menegotto J, Cardon P, Duplaa H, Caron A, Lacabanne C, Bauer M. Dielectric study of the molecular mobility and the isothermal crystallization kinetics of an amorphous pharmaceutical drug substance. J Pharm Sci 2004; 93:218-33. [PMID: 14648651 DOI: 10.1002/jps.10520] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
During the development of new pharmaceutical products based on drug substances in their amorphous form, the molecular mobility of an amorphous active ingredient was characterized in detail within a very broad time-temperature range. The relation between the isothermal crystallization kinetics and the dynamics of this amorphous substance was investigated. First, dynamic dielectric spectroscopy (DDS) and the thermostimulated current (TSC) techniques were used to analyze the molecular mobility of the amorphous drug substance over a wide frequency and temperature range (the drug substance is referred to as SSR in this text and was chosen as a model glass-forming system). Two relaxation processes, corresponding to different molecular motions, were identified. The beta(a)-relaxation process, associated with intramolecular oscillation of small dipolar groups, followed Arrhenius temperature behavior over the entire time-temperature domain that was studied. However, the main alpha(a)-relaxation process, assigned to the dielectric manifestation of the dynamic glass transition of the amorphous phase, was described by Vogel-Fulcher-Tammann (VFT) and Arrhenius behavior above and below the glass transition temperature (T(g)) respectively. The physical meaning of these complex dynamics is explained in the context of the Adam and Gibbs (AG) model, by the temperature dependence of the size of cooperatively rearranging regions (CRR) that govern the time scale of delocalized molecular motions. The distinction between the molecular mobility and the structural relaxation of amorphous systems below T(g) is discussed. This work shows that the complementary nature of both DDS and TSC techniques is essential to directly analyze the intramolecular and molecular motions of disordered phases over a wide time-temperature range above and below the T(g). Second, real-time dielectric measurements were carried out to determine the isothermal crystallization kinetics of the SSR amorphous drug. Whatever the crystalline form obtained over time in the crystallization process, the decrease of the dielectric response of amorphous phase, which is characteristic of the isothermal crystallization, was studied to monitor the time dependence of the degree of crystallinity. The characteristic crystallization time, derived from Kohlrausch-Williams-Watt (KWW)-Avrami analyses performed at different temperatures, followed an Arrhenius temperature dependence. Behaviors specific to the molecular mobility of the amorphous drug substance were compared with the characteristic crystallization time. It was concluded that the crystal growth process of the SSR drug seems to be controlled by the intramolecular motions involving the beta(a)-relaxation mode and not by the molecular motions responsible for the alpha(a)-relaxation mode in the range of temperatures >T(g). Subsequent studies will focus on the crystallization process of the SSR drug in the glassy state (T < T(g)).
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Affiliation(s)
- J Alie
- Polymer Physics Laboratory, CIRIMAT UMR 5085, Université Paul Sabatier, 118 route de Narbonne, 31062 Toulouse Cedex, France
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Dantras E, Dandurand J, Lacabanne C, Laffont L, Tarascon JM, Archambeau S, Seguy I, Destruel P, Bock H, Fouet S. HRTEM, TSC and broadband dielectric spectroscopy of a discotic liquid crystal. Phys Chem Chem Phys 2004. [DOI: 10.1039/b402063d] [Citation(s) in RCA: 8] [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: 11/21/2022]
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Samouillan V, Dandurand J, Lacabanne C, Thoma RJ, Adams A, Moore M. Comparison of chemical treatments on the chain dynamics and thermal stability of bovine pericardium collagen. J Biomed Mater Res A 2003; 64:330-8. [PMID: 12522820 DOI: 10.1002/jbm.a.10326] [Citation(s) in RCA: 18] [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: 11/05/2022]
Abstract
A new approach for the replacement of heart valves consists of obtaining an acellular matrix from animal aortic valves that performs mechanically, is nonantigenic, and is free from calcification and fibroblast proliferation. Novel biochemical treatments must be developed for this purpose. In this work, we focus on the characterization of collagen in acellular bovine cardiovascular tissues, fresh or glutaraldehyde treated, and stored in different solutions [phosphate-buffered saline (PBS), ethanol, octanol, and glutaraldehyde], to determine whether the resulting fibrous material is structurally preserved. The preservation of the triple helical structure of collagen is checked by differential scanning calorimetry (DSC), which is a well suited technique to analyze thermal transitions in proteins, such as denaturation. To get insight into the molecular dynamics of collagen in the nanometric range, we used thermally stimulated currents, a dielectric technique running at low frequency, that measure the dipolar reorientations in proteins submitted to a static electrical field. The combined use of these two techniques allowed us to evaluate the physical structure and conformation of collagen after the different chemical treatments. We have found that the glutaraldehyde treatment followed by octanol storage preserves the triple helical conformation of the polypeptidic chains of collagen, contrary to the ethanol and PBS storage that induce drastic changes in the thermal and dielectric behavior of the protein. Moreover, this particular chemical treatment stabilizes the collagen structure (shift toward high temperature of the collagen denaturation and stiffening of the chains by a cross-linking action) when compared to the control sample, and so could provide interesting fibrous material for the conception of bioprosthetic heart valve.
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Affiliation(s)
- V Samouillan
- Laboratoire de Physique des Polymères, CIRIMAT UMR-5085, Université Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex 4, France
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Brouillet-Fourmann S, Carrot C, Lacabanne C, Mignard N, Samouillan V. Evolution of interactions between water and native corn starch as a function of moisture content. J Appl Polym Sci 2002. [DOI: 10.1002/app.11288] [Citation(s) in RCA: 13] [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: 11/07/2022]
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Affiliation(s)
- E. Dudognon
- Laboratoire de Physique des Polymères, Université Paul Sabatier, 31062 Toulouse Cedex 04, France
| | - A. Bernès
- Laboratoire de Physique des Polymères, Université Paul Sabatier, 31062 Toulouse Cedex 04, France
| | - C. Lacabanne
- Laboratoire de Physique des Polymères, Université Paul Sabatier, 31062 Toulouse Cedex 04, France
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Issoupov V, Demont P, Lacabanne C, Startsev OV, Viel V, Dinguirard M. Thermally stimulated creep (TSCr) study of viscoelastic behavior and physical aging of a polymeric matrix composite for spacecraft structures. J Appl Polym Sci 2002. [DOI: 10.1002/app.10638] [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: 11/08/2022]
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Paolpi M, Lacabanne C. Characterization of structural heterogeneity of polyurethane coatings. J Appl Polym Sci 2001. [DOI: 10.1002/app.1725] [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: 11/07/2022]
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Dantras E, Lacabanne C, Caminade AM, Majoral JP. TSC and Broadband Dielectric Spectroscopy Studies of β Relaxation in Phosphorus-Containing Dendrimers. Macromolecules 2001. [DOI: 10.1021/ma001740v] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Dudognon E, Bernès A, Lacabanne C. Study by Thermostimulated Currents of Dielectric Relaxations through the Glass Transition in an Amorphous Polymer: Poly(n-butyl methacrylate). Macromolecules 2001. [DOI: 10.1021/ma001634t] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- E. Dudognon
- Laboratoire de Physique des Polymères, CIRIMAT, Université Paul Sabatier, 31062 Toulouse, Cedex 04, France
| | - A. Bernès
- Laboratoire de Physique des Polymères, CIRIMAT, Université Paul Sabatier, 31062 Toulouse, Cedex 04, France
| | - C. Lacabanne
- Laboratoire de Physique des Polymères, CIRIMAT, Université Paul Sabatier, 31062 Toulouse, Cedex 04, France
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Samouillan V, Lamure A, Maurel E, Dandurand J, Lacabanne C, Spina M. Dielectric characterization of collagen, elastin, and aortic valves in the low temperature range. J Biomater Sci Polym Ed 2001; 11:583-98. [PMID: 10981675 DOI: 10.1163/156856200743887] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The low temperature dielectric relaxation of porcine aortic valves and its main macromolecular proteins. i.e. elastin and collagen, have been investigated in the dry state and at low levels of hydration by thermally stimulated currents spectrometry, with an equivalent frequency of 10(-3) Hz. Two secondary relaxation modes, labeled gamma and beta with increasing temperature, are found for the three materials. Since the gamma-mode is independent upon hydration while the beta-mode is strongly plasticized by water, these relaxation modes have been attributed to localized motions of the polypeptidic chains containing apolar and polar residues, respectively. The deconvolution of the beta-mode by fractional polarization gives the experimental distribution of the dielectric relaxation times of the three materials, and allows us to deduce the activation parameters of each elementary process. These analyses shows the existence of compensation phenomena between the activation parameters, implying cooperative mechanisms. The occurrence of these phenomena with their characteristic parameters are used to specify the origin of the localized relaxation modes in collagen and elastin, and to assign the specific role of each protein in the aortic valves.
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Affiliation(s)
- V Samouillan
- Laboratoire de Physique des Polymères, Université Paul Sabatier, Toulouse, France
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Abstract
The high temperature dielectric relaxations of purified and elastolized ligamentum nuchae elastin in the dry state have been investigated by thermally stimulated depolarization current spectrometry, with an equivalent frequency comprised between 10(-2) and 10(-3) Hz. A main relaxation mode, located close to 150 degrees C and attributed to the dielectric manifestation of a glass transition, is found for all samples. After decomposition by the fractional polarization method, the analysis of the high temperature mode shows the existence of two relaxation mechanisms: a cooperative one, associated with flexible zones of the protein, and an isoenthalpic one, corresponding to more ordered and constrained zones. The activation parameters of the two mechanisms are dependent on the extent of elastolysis and on the nature of enzyme (pancreatic elastase vs leukocyte elastase). Both enzymes influence the dielectric behavior of elastin in a similar way: the activation enthalpy maximum of the relaxing units located in the flexible zones, characteristic of the cooperative length, decreases with increasing hydrolysis. Moreover, the isoenthalpic mechanism becomes cooperative at the highest extent of elastolysis, which highlights release of constraints in ordered zones. Nevertheless, the differences found between the two enzymatic hydrolyses are characteristic of distinct sites of cleavage in the elastin network.
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Affiliation(s)
- V Samouillan
- Physics Polymer Laboratory, Paul Sabatier University, 31062 Toulouse Cedex, France
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Affiliation(s)
- S. Doulut
- UMR CIRIMAT, Laboratoire de Physique des Polymères, Université Paul Sabatier, 31062 Toulouse, France
| | - P. Demont
- UMR CIRIMAT, Laboratoire de Physique des Polymères, Université Paul Sabatier, 31062 Toulouse, France
| | - C. Lacabanne
- UMR CIRIMAT, Laboratoire de Physique des Polymères, Université Paul Sabatier, 31062 Toulouse, France
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Samouillan V, Lamure A, Maurel E, Dandurand J, Lacabanne C, Ballarin F, Spina M. Characterisation of elastin and collagen in aortic bioprostheses. Med Biol Eng Comput 2000; 38:226-31. [PMID: 10829418 DOI: 10.1007/bf02344781] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Porcine aortic valves used as cardiac valve bioprostheses are well adapted to physiological functions in the short term, but they lack long-term durability. Several multi-step extractions have been performed to obtain a perfectly acellular matrix. A new physical methodology is proposed to evaluate the resulting fibrous protein damage after biochemical extraction (TRI-COL and SDS). Thermal analysis techniques are adapted to collagen and elastin characterisation in the solid state. The aortic tissue thermal transitions are determined by differential scanning calorimetry (DSC): elastin glass transition is observed around 200 degrees C, and collagen denaturation is observed around 230 degrees C. These parameters are characteristic of the elastin network arrangement and of collagen triple-helix stability. The technique of thermostimulated currents (TSC) is well suited to specify the chain dynamics of proteins. The low-temperature relaxations observed in both collagen and elastin are associated with localised motions, whereas the high-temperature modes are attributed to more delocalized motions of the chains. Therefore TSC and DSC spectrometries allow physical parameters specific to collagen and elastin to be obtained and their interaction in aortic tissues to be determined. According to the significant evolution of these parameters on SDS samples, the destabilizing effect of this detergent is highlighted.
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Affiliation(s)
- V Samouillan
- Laboratoire de Physique des Polymères, Université Paul Sabatier, Toulouse, France.
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Menegotto J, Demont P, Bernes A, Lacabanne C. Combined dielectric spectroscopy and thermally stimulated currents studies of the secondary relaxation process in amorphous poly(ethylene terephthalate). ACTA ACUST UNITED AC 1999. [DOI: 10.1002/(sici)1099-0488(19991215)37:24<3494::aid-polb10>3.0.co;2-v] [Citation(s) in RCA: 33] [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: 11/08/2022]
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