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Guérin H, Quénée P, Palussière S, Courtin P, André G, Péchoux C, Costache V, Mahony J, van Sinderen D, Kulakauskas S, Chapot-Chartier MP. PBP2b Mutations Improve the Growth of Phage-Resistant Lactococcus cremoris Lacking Polysaccharide Pellicle. Appl Environ Microbiol 2023; 89:e0210322. [PMID: 37222606 PMCID: PMC10304956 DOI: 10.1128/aem.02103-22] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 12/12/2022] [Accepted: 05/01/2023] [Indexed: 05/25/2023] Open
Abstract
Lactococcus lactis and Lactococcus cremoris are Gram-positive lactic acid bacteria widely used as starter in milk fermentations. Lactococcal cells are covered with a polysaccharide pellicle (PSP) that was previously shown to act as the receptor for numerous bacteriophages of the Caudoviricetes class. Thus, mutant strains lacking PSP are phage resistant. However, because PSP is a key cell wall component, PSP-negative mutants exhibit dramatic alterations of cell shape and severe growth defects, which limit their technological value. In the present study, we isolated spontaneous mutants with improved growth, from L. cremoris PSP-negative mutants. These mutants grow at rates similar to the wild-type strain, and based on transmission electron microscopy analysis, they exhibit improved cell morphology compared to their parental PSP-negative mutants. In addition, the selected mutants maintain their phage resistance. Whole-genome sequencing of several such mutants showed that they carried a mutation in pbp2b, a gene encoding a penicillin-binding protein involved in peptidoglycan biosynthesis. Our results indicate that lowering or turning off PBP2b activity suppresses the requirement for PSP and ameliorates substantially bacterial fitness and morphology. IMPORTANCE Lactococcus lactis and Lactococcus cremoris are widely used in the dairy industry as a starter culture. As such, they are consistently challenged by bacteriophage infections which may result in reduced or failed milk acidification with associated economic losses. Bacteriophage infection starts with the recognition of a receptor at the cell surface, which was shown to be a cell wall polysaccharide (the polysaccharide pellicle [PSP]) for the majority of lactococcal phages. Lactococcal mutants devoid of PSP exhibit phage resistance but also reduced fitness, since their morphology and division are severely impaired. Here, we isolated spontaneous, food-grade non-PSP-producing L. cremoris mutants resistant to bacteriophage infection with a restored fitness. This study provides an approach to isolate non-GMO phage-resistant L. cremoris and L. lactis strains, which can be applied to strains with technological functionalities. Also, our results highlight for the first time the link between peptidoglycan and cell wall polysaccharide biosynthesis.
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Affiliation(s)
- Hugo Guérin
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
| | - Pascal Quénée
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
| | - Simon Palussière
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
| | - Pascal Courtin
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
| | - Gwenaëlle André
- Université Paris-Saclay, INRAE, MaIAGE, Jouy-en-Josas, France
| | - Christine Péchoux
- Université Paris-Saclay, INRAE, GABI, Jouy-en-Josas, France
- MIMA2 Imaging Core Facility, Microscopie et Imagerie des Microorganismes, Animaux et Aliments, INRAE, Jouy-en-Josas, France
| | - Vlad Costache
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
- MIMA2 Imaging Core Facility, Microscopie et Imagerie des Microorganismes, Animaux et Aliments, INRAE, Jouy-en-Josas, France
| | - Jennifer Mahony
- School of Microbiology and APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Douwe van Sinderen
- School of Microbiology and APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Saulius Kulakauskas
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
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Onésime D, Vidal L, Thomas S, Henry C, Martin V, André G, Kubiak P, Minard P, Celinska E, Nicaud JM. A unique, newly discovered four-member protein family involved in extracellular fatty acid binding in Yarrowia lipolytica. Microb Cell Fact 2022; 21:200. [PMID: 36182920 PMCID: PMC9526294 DOI: 10.1186/s12934-022-01925-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 09/14/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Yarrowia lipolytica, a nonconventional oleaginous yeast species, has attracted attention due to its high lipid degradation and accumulation capacities. Y. lipolytica is used as a chassis for the production of usual and unusual lipids and lipid derivatives. While the genes involved in the intracellular transport and activation of fatty acids in different cellular compartments have been characterized, no genes involved in fatty acid transport from the extracellular medium into the cell have been identified thus far. In this study, we identified secreted proteins involved in extracellular fatty acid binding. RESULTS Recent analysis of the Y. lipolytica secretome led to the identification of a multigene family that encodes four secreted proteins, preliminarily named UP1 to UP4. These proteins were efficiently overexpressed individually in wild-type and multideletant strain (Q4: Δup1Δup2Δup3Δup4) backgrounds. Phenotypic analysis demonstrated the involvement of these proteins in the binding of extracellular fatty acids. Additionally, gene deletion and overexpression prevented and promoted sensitivity to octanoic acid (C8) toxicity, respectively. The results suggested binding is dependent on aliphatic chain length and fatty acid concentration. 3D structure modeling supports the proteins' role in fatty acid assimilation at the molecular level. CONCLUSIONS We discovered a family of extracellular-fatty-acid-binding proteins in Y. lipolytica and have proposed to name its members eFbp1 to eFbp4. The exact mode of eFbps action remains to be deciphered individually and synergistically; nevertheless, it is expected that the proteins will have applications in lipid biotechnology, such as improving fatty acid production and/or bioconversion.
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Affiliation(s)
- Djamila Onésime
- Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, 78350, Jouy-en-Josas, France
| | - Léa Vidal
- Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, 78350, Jouy-en-Josas, France
| | - Stéphane Thomas
- Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, 78350, Jouy-en-Josas, France
| | - Céline Henry
- Plateforme d'Analyse Protéomique Paris Sud-Ouest (PAPPSO), INRAE, MICALIS Institute, Université Paris-Saclay, 78350, Jouy-en-Josas, France
| | - Véronique Martin
- INRAE, MaIAGE, Université Paris-Saclay, 78350, Jouy-en-Josas, France
| | - Gwenaëlle André
- INRAE, MaIAGE, Université Paris-Saclay, 78350, Jouy-en-Josas, France
| | - Piotr Kubiak
- Department of Biotechnology and Food Microbiology, Poznan University of Life Sciences, ul. Wojska Polskiego 48, 60-627, Poznań, Poland
| | - Philippe Minard
- CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, 91198, Gif-sur-Yvette, France
| | - Ewelina Celinska
- Department of Biotechnology and Food Microbiology, Poznan University of Life Sciences, ul. Wojska Polskiego 48, 60-627, Poznań, Poland
| | - Jean-Marc Nicaud
- Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, 78350, Jouy-en-Josas, France. .,INRAE-AgroParisTech, UMR1319, Team BIMLip: Integrative Metabolism of Microbial Lipids, Micalis Institute, Domaine de Vilvert, 78352, Jouy-en-Josas, France.
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Trémollieres FA, Chabbert-Buffet N, Plu-Bureau G, Rousset-Jablonski C, Lecerf JM, Duclos M, Pouilles JM, Gosset A, Boutet G, Hocke C, Maris E, Hugon-Rodin J, Maitrot-Mantelet L, Robin G, André G, Hamdaoui N, Mathelin C, Lopes P, Graesslin O, Fritel X. Management of postmenopausal women: Collège National des Gynécologues et Obstétriciens Français (CNGOF) and Groupe d'Etude sur la Ménopause et le Vieillissement (GEMVi) Clinical Practice Guidelines. Maturitas 2022; 163:62-81. [PMID: 35717745 DOI: 10.1016/j.maturitas.2022.05.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 03/23/2022] [Accepted: 05/17/2022] [Indexed: 12/26/2022]
Abstract
AIM The aim of these recommendations is to set forth an individualized approach to the management of early postmenopausal women (i.e., within the first 10 years after natural menopause) covering all aspects of lifestyle and therapeutic management, with or without menopause hormone therapy (MHT). MATERIALS AND METHODS Literature review and consensus of French expert opinion. Recommendations were graded according to the HAS methodology and levels of evidence derived from the international literature, except when there was no good-quality evidence. SUMMARY RECOMMENDATIONS The beginning of menopause is an ideal time for each woman to evaluate her health status by assessing her bone, cardiovascular, and cancer-related risk factors that may be amplified by postmenopausal estrogen deficiency and by reviewing her lifestyle habits. Improving lifestyle, including nutrition and physical activity, and avoiding risk factors (notably smoking), should be recommended to all women. MHT remains the most effective treatment for vasomotor symptoms but it could be also recommended as first-line treatment for the prevention of osteoporosis in early postmenopausal women at low to moderate risk for fracture. The risks of MHT differ depending on its type, dose, duration of use, route of administration, timing of initiation, and whether a progestogen is used. There is reasonable evidence that using transdermal estradiol in association with micronized progesterone or dydrogesterone may limit both the venous thromboembolic risk associated with oral estrogens and the risk of breast cancer associated with synthetic progestins. Treatment should be individualized to each woman, by using the best available evidence to maximize benefits and minimize risks, with periodic reevaluation of its benefit-risk balance. For bothersome genitourinary syndrome of menopause (GSM) symptoms, vaginal treatment with lubricants and moisturizers is recommended as first-line treatment together with low-dose vaginal estrogen therapy, depending on the clinical course. No recommendation of an optimal duration of MHT can be made, but it must take into consideration the initial indication for MHT as well as each woman's benefit-risk balance. Management of gynecological side-effects of MHT is also examined. These recommendations are endorsed by the Groupe d'Etude sur la Ménopause et le Vieillissement hormonal (GEMVI) and the Collège National des Gynécologues-Obstétriciens Français (CNGOF).
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Affiliation(s)
- F A Trémollieres
- Centre de Ménopause et Maladies Osseuses Métaboliques, Hôpital Paule-de-Viguier, CHU Toulouse, 330, avenue de Grande-Bretagne, TSA 70034, 31059 Toulouse, France; Inserm U1048-I2MC-Equipe 9, Université Toulouse III Paul-Sabatier, 1, avenue du Professeur-Jean-Poulhes, BP 84225, 31432 Toulouse cedex 4, France.
| | - N Chabbert-Buffet
- Service de gynécologie obstétrique, médecine de la reproduction, APHP Sorbonne Universitaire, Site Tenon, 4, rue de la Chine, 75020 Paris, France
| | - G Plu-Bureau
- Unité de gynécologie médicale, Hôpital Port-Royal, 123 boulevard de Port-Royal, 75014 Paris, France; Université de Paris, Paris, France; Inserm U1153 Equipe EPOPEE, Paris, France
| | - C Rousset-Jablonski
- Département de chirurgie oncologique, Centre Léon Bérard, 28, Promenade Léa-et-Napoléon-Bullukian, 69008 Lyon, France; Département d'obstétrique et gynécologie, Hospices Civils de Lyon, CHU Lyon Sud, 165, Chemin du Grand-Revoyet, 69310 Pierre-Bénite, France; Université Lyon, EA 7425 HESPER-Health Services and Performance Research, 8, avenue Rockefeller, 69003 Lyon, France
| | - J M Lecerf
- Service de nutrition et activité physique, Institut Pasteur de Lille, 1, rue du Professeur-Calmette, 59019 Lille cedex, France; Service de médecine interne, CHRU Lille, 2, avenue Oscar-Lambret, 59000 Lille, France
| | - M Duclos
- Service de médecine du sport et des explorations fonctionnelles, CHU Clermont-Ferrand, 63003 Clermont-Ferrand, France; Clermont Université, Université d'Auvergne, UFR Médecine, BP 10448, 63000 Clermont-Ferrand, France; INRAE, UMR 1019, UNH, CRNH Auvergne, 63000 Clermont-Ferrand, France
| | - J M Pouilles
- Centre de Ménopause et Maladies Osseuses Métaboliques, Hôpital Paule-de-Viguier, CHU Toulouse, 330, avenue de Grande-Bretagne, TSA 70034, 31059 Toulouse, France
| | - A Gosset
- Centre de Ménopause et Maladies Osseuses Métaboliques, Hôpital Paule-de-Viguier, CHU Toulouse, 330, avenue de Grande-Bretagne, TSA 70034, 31059 Toulouse, France
| | - G Boutet
- AGREGA, Service de chirurgie gynécologique et médecine de la reproduction, Centre Aliénor d'Aquitaine, Hôpital Pellegrin, 33000 Bordeaux, France
| | - C Hocke
- Service de chirurgie gynécologique et médecine de la reproduction, Centre Aliénor d'Aquitaine, CHU de Bordeaux, Place Amélie-Raba-Léon, 33076 Bordeaux cedex, France
| | - E Maris
- Département d'obstétrique et gynécologie, CHU Montpellier, Université Montpellier, Montpellier, France
| | - J Hugon-Rodin
- Unité de gynécologie médicale, Hôpital Port-Royal, 123 boulevard de Port-Royal, 75014 Paris, France
| | - L Maitrot-Mantelet
- Unité de gynécologie médicale, Hôpital Port-Royal, 123 boulevard de Port-Royal, 75014 Paris, France
| | - G Robin
- Service de gynécologie médicale, orthogénie et sexologie, UF de gynécologie endocrinienne, Hôpital Jeanne-de-Flandre, CHU de Lille, avenue Eugène-Avinée, 59037 Lille cedex, France
| | - G André
- 15, boulevard Ohmacht, 67000 Strasbourg, France
| | - N Hamdaoui
- Centre Hospitalier Universitaire Nord, Assistance publique-Hôpitaux de Marseille, Chemin des Bourrely, 13015 Marseille, France
| | - C Mathelin
- Institut de cancérologie Strasbourg Europe, 17, rue Albert-Calmette, 67200 Strasbourg, France; Hôpitaux Universitaires de Strasbourg, 1 avenue Molière, 67200 Strasbourg, France; Institut de génétique et de biologie moléculaire et cellulaire (IGBMC), CNRS UMR7104 Inserm U964, 1, rue Laurent-Fries, 67400 Illkirch-Graffenstaden, France
| | - P Lopes
- Nantes, France Polyclinique de l'Atlantique Saint Herblain, 44819 St Herblain, France; Université ́de Nantes, 44093 Nantes cedex, France
| | - O Graesslin
- Département de gynécologie-obstétrique, Institut Mère-Enfant Alix de Champagne, Centre Hospitalier Universitaire, 45, rue Cognacq-Jay, 51092 Reims cedex, France
| | - X Fritel
- Service de gynécologie-obstétrique et médecine de la reproduction, CHU de Poitiers, 2, rue de la Milétrie, 86000 Poitiers, France
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André G. [Menopause hormone therapy and cognition. Postmenopausal women management: CNGOF and GEMVi clinical practice guidelines]. Gynecol Obstet Fertil Senol 2021; 49:448-454. [PMID: 33757928 DOI: 10.1016/j.gofs.2021.03.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The results of the WHI, which reported a doubling of the risk of Alzheimer's disease (AD) and a decline in cognitive function in women who were given menopause hormone therapy (MHT), have raised concerns on the deleterious impact of MHT on the central nervous system. Such as for the cardiovascular system, the very late age of initiation of treatment and the nature of the molecules have led to conclusions that cannot be extended to women in their fifties, at the onset of their menopause which is the usual age of MHT initiation. The molecules, which are used in France, 17-beta estradiol and natural progesterone (or its isomer, dydrogesterone) are very different from the equine conjugated estrogens and medroxyprogesterone acetate used in the WHI. It can now be stated that if MHT is started within the window of opportunity (i.e. before the age of 60 or within the first 10years after the beginning of menopause) no deleterious effect on cognition is observed. Moreover, cognition remains relatively stable at the beginning of menopause since the cognitive reserve as well as the different compensation circuits allow compensation for estrogen deficiency. This does not in any way prejudge a possible positive effect of MHT on AD, which is very difficult to demonstrate, as the age of onset of this dementia is very late, 20 or 30years after the initiation of treatment.
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Affiliation(s)
- G André
- 15, boulevard Ohmacht, 67000 Strasbourg, France.
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Trémollieres F, Chabbert-Buffet N, Plu-Bureau G, Rousset-Jablonski C, Lecerf JM, Duclos M, Pouilles JM, Gosset A, Boutet G, Hocke C, Maris E, Hugon-Rodin J, Maitrot-Mantelet L, Robin G, André G, Hamdaoui N, Mathelin C, Lopes P, Graesslin O, Fritel X. [Postmenopausal women management: CNGOF and GEMVi clinical practice guidelines (Short version)]. Gynecol Obstet Fertil Senol 2021; 49:305-317. [PMID: 33863697 DOI: 10.1016/j.gofs.2021.03.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- F Trémollieres
- Centre de ménopause et maladies osseuses métaboliques, Hôpital Paule-de-Viguier, CHU Toulouse, 330, avenue de Grande-Bretagne, TSA 70034, 31059 Toulouse, France; Inserm U1048-I2MC-Équipe 9, Université Toulouse III Paul-Sabatier, 1, avenue du Professeur-Jean-Poulhès, BP 84225, 31432 Toulouse cedex 4, France.
| | - N Chabbert-Buffet
- Service de gynécologie obstétrique, médecine de la reproduction, APHP Sorbonne Universitaire, Site Tenon, 4, rue de la Chine, 75020 Paris, France
| | - G Plu-Bureau
- Unité de gynécologie médicale, Hôpital Port-Royal, 123 boulevard de Port-Royal, 75014 Paris, France; Université de Paris, Paris, France; Inserm U1153 Equipe EPOPEE, Paris, France
| | - C Rousset-Jablonski
- Département de chirurgie oncologique, Centre Léon Bérard, 28, Prom.-Léa-et-Napoléon-Bullukian, 69008 Lyon, France; Département d'obstétrique et gynécologie, Hospices Civils de Lyon, CHU Lyon Sud, 165, Chemin du Grand-Revoyet, 69310 Pierre-Bénite, France; Université Lyon, EA 7425 HESPER-Health Services and Performance Research, 8, avenue Rockefeller, 69003 Lyon, France
| | - J-M Lecerf
- Service de nutrition et activité physique, Institut Pasteur de Lille, 1, rue du Professeur-Calmette, 59019 Lille cedex, France; Service de médecine interne, CHRU Lille, 2, avenue Oscar-Lambret, 59000 Lille, France
| | - M Duclos
- Service de médecine du sport et des explorations fonctionnelles, CHU Clermont-Ferrand, 63003 Clermont-Ferrand, France; Clermont Université, Université d'Auvergne, UFR Médecine, BP 10448, 63000 Clermont-Ferrand, France; INRAE, UMR 1019, UNH, CRNH Auvergne, 63000 Clermont-Ferrand, France
| | - J-M Pouilles
- Centre de ménopause et maladies osseuses métaboliques, Hôpital Paule-de-Viguier, CHU Toulouse, 330, avenue de Grande-Bretagne, TSA 70034, 31059 Toulouse, France
| | - A Gosset
- Centre de ménopause et maladies osseuses métaboliques, Hôpital Paule-de-Viguier, CHU Toulouse, 330, avenue de Grande-Bretagne, TSA 70034, 31059 Toulouse, France
| | - G Boutet
- AGREGA, Service de chirurgie gynécologique et médecine de la reproduction, Centre Aliénor d'Aquitaine, Hôpital Pellegrin, 33000 Bordeaux, France
| | - C Hocke
- Service de chirurgie gynécologique et médecine de la reproduction, Centre Aliénor d'Aquitaine, CHU de Bordeaux, Place Amélie-Raba-Léon, 33076 Bordeaux cedex, France
| | - E Maris
- Département d'obstétrique et gynécologie, CHU Montpellier, Université Montpellier, Montpellier, France
| | - J Hugon-Rodin
- Service de Gynécologie, Groupe hospitalier Paris Saint Joseph, Inserm, U1153, epidémiologie obstétricale, périnatale et pédiatrique, Centre de recherche en épidémiologie et statistiques, Paris, France
| | - L Maitrot-Mantelet
- Unité de gynécologie médicale, Hôpital Port-Royal, 123 boulevard de Port-Royal, 75014 Paris, France
| | - G Robin
- Service de gynécologie médicale, orthogénie et sexologie, UF de gynécologie endocrinienne, Hôpital Jeanne-de-Flandre, CHU de Lille, avenue Eugène-Avinée, 59037 Lille cedex, France
| | - G André
- 15, boulevard Ohmacht, 67000 Strasbourg, France
| | - N Hamdaoui
- Centre Hospitalier Universitaire Nord, Assistance publique-Hôpitaux de Marseille, Chemin des Bourrely, 13015 Marseille, France
| | - C Mathelin
- Institut de cancérologie Strasbourg Europe, 17, rue Albert-Calmette, 67200 Strasbourg, France; Hôpitaux Universitaires de Strasbourg, 1 avenue Molière, 67200 Strasbourg, France; Institut de génétique et de biologie moléculaire et cellulaire (IGBMC), CNRS UMR7104 Inserm U964, 1, rue Laurent-Fries, 67400 Illkirch-Graffenstaden, France
| | - P Lopes
- Nantes, France Polyclinique de l'Atlantique Saint Herblain, 44819 St Herblain, France; Université de Nantes, 44093 Nantes cedex, France
| | - O Graesslin
- Département de gynécologie-obstétrique, Institut Mère-Enfant Alix de Champagne, Centre Hospitalier Universitaire, 45, rue Cognacq-Jay, 51092 Reims cedex, France
| | - X Fritel
- Service de gynécologie-obstétrique et médecine de la reproduction, CHU de Poitiers, 2, rue de la Milétrie, 86000 Poitiers, France
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Mattuizzi A, Sauvestre F, André G, Poingt M, Camberlein C, Carles D, Pelluard F, Blanco P, Sentilhes L, Lazaro E. Adverse perinatal outcomes of chronic intervillositis of unknown etiology: an observational retrospective study of 122 cases. Sci Rep 2020; 10:12611. [PMID: 32724097 PMCID: PMC7387519 DOI: 10.1038/s41598-020-69191-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Accepted: 07/03/2020] [Indexed: 01/03/2023] Open
Abstract
Our study aimed to assess perinatal outcomes and recurrence rate of Chronic Intervillositis of Unknown Etiology (CIUE). We conducted an observational retrospective study in a tertiary care university hospital in France from January 1, 1997 to July 31, 2018. 122 pregnancies (102 women) with CIUE were included. Cases of the Department of Histopathology placenta database were re-analysed independently by three pathologists specializing in fetal pathology. Diagnosis of CIUE was confirmed according to: (1) the presence of cellular infiltrate in the intervillous space, (2) ~ 80% of the mononuclear cells in the intervillous space positive for CD68, (3) infiltration occupying at least 5% of the intervillous space, and (4) no clinical or histopathological sign of infection. Outcomes of pregnancies with CIUE (miscarriages, stillbirths, terminations of pregnancy, live birth with or without prematurity or fetal growth restriction) and proportion of CIUE recurrence were analysed. The lost pregnancies comprised 17 (13.9%) miscarriages, 17 (13.9%) stillbirths, and 18 (14.8%) terminations of pregnancy. Of the 70 (57.4%) pregnancies that led to a live birth, 38 (54.3%) new-borns were premature and 50 (72.5%) exhibited fetal growth restriction. Among the 102 women, 23 subsequently became pregnant, half of whom (n = 11) developed recurrent CIUE. CIUE was associated with high rates of adverse perinatal outcomes, including pregnancy loss, fetal growth restriction, and preterm birth with a risk of recurrence nearly 50%.
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Affiliation(s)
- Aurélien Mattuizzi
- Department of Obstetrics and Gynaecology, Bordeaux University Hospital, Place Amélie Rabat Léon, 33000, Bordeaux, France. .,CNRS-UMR 5164, ImmunoConcEpT, Bordeaux University, Bordeaux, France.
| | - Fanny Sauvestre
- Department of Pathology, Bordeaux University Hospital, Bordeaux, France.,CNRS-UMR 5164, ImmunoConcEpT, Bordeaux University, Bordeaux, France
| | - Gwenaëlle André
- Department of Pathology, Bordeaux University Hospital, Bordeaux, France
| | - Marion Poingt
- Department of Obstetrics and Gynaecology, Bordeaux Nord Polyclinic, Bordeaux, France
| | - Camille Camberlein
- Department of Obstetrics and Gynaecology, Bordeaux University Hospital, Place Amélie Rabat Léon, 33000, Bordeaux, France
| | - Dominique Carles
- Department of Pathology, Bordeaux University Hospital, Bordeaux, France
| | - Fanny Pelluard
- Department of Pathology, Bordeaux University Hospital, Bordeaux, France
| | - Patrick Blanco
- Department of Immunology, Bordeaux University Hospital, Bordeaux, France.,CNRS-UMR 5164, ImmunoConcEpT, Bordeaux University, Bordeaux, France
| | - Loïc Sentilhes
- Department of Obstetrics and Gynaecology, Bordeaux University Hospital, Place Amélie Rabat Léon, 33000, Bordeaux, France
| | - Estibaliz Lazaro
- Department of Internal Medicine, Bordeaux University Hospital, Bordeaux, France.,CNRS-UMR 5164, ImmunoConcEpT, Bordeaux University, Bordeaux, France
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Sauvestre F, Marguet F, Rooryck C, Vuillaume ML, Cardinaud F, Laquerrière A, André G, Pelluard F. Early fetal presentation of Koolen-de Vries: Case report with literature review. Eur J Med Genet 2017; 60:605-609. [PMID: 28811189 DOI: 10.1016/j.ejmg.2017.08.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 05/10/2017] [Accepted: 08/10/2017] [Indexed: 10/19/2022]
Abstract
Koolen-de Vries syndrome (MIM#610443) is a rare microdeletion syndrome involving the 17q21.31 region, which was first described by Koolen in 2006. Clinical and behavioral characteristics have been extensively reported from more than 100 postnatal cases including infants, children and young adults. The syndrome is highly clinically heterogeneous, but the main features associate characteristic cranio-facial dysmorphism, heart defects, limb, skeletal, genito-urinary anomalies, along with intellectual disability with early childhood epilepsy and behavioral disturbances. Central nervous system malformations usually consist in hydrocephalus and thin corpus callosum. We report herein an early fetal case with an apparently isolated abnormal corpus callosum diagnosed by ultrasonography, for which a medical termination of the pregnancy was achieved at 22 weeks of gestation. Postmortem examination displayed facial dysmorphism consisting of hypertelorism, short philtrum and flat and broad nose, cleft palate and left duplex ureter. Neuropathological examination revealed a mega corpus callosum that has never been reported so far in this syndrome. Array-CGH performed on thymic DNA tissue revealed a 17q21.31 microdeletion, which allowed for the confirmation of early occurring Koolen-de Vries syndrome.
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Affiliation(s)
- Fanny Sauvestre
- Department of Pathology, Bordeaux University Hospital, Pellegrin Hospital, Bordeaux, France.
| | - Florent Marguet
- Normandie Univ, UNIROUEN, INSERM U1245, Rouen University Hospital, Department of Pathology, Rouen, France
| | - Caroline Rooryck
- Department of Medical Genetics, Centre de Référence des Anomalies Du Développement Embryonnaire, Bordeaux University Hospital, Pellegrin Hospital, Bordeaux, France
| | - Marie-Laure Vuillaume
- Department of Medical Genetics, Centre de Référence des Anomalies Du Développement Embryonnaire, Bordeaux University Hospital, Pellegrin Hospital, Bordeaux, France
| | | | - Annie Laquerrière
- Normandie Univ, UNIROUEN, INSERM U1245, Rouen University Hospital, Department of Pathology, Rouen, France
| | - Gwenaëlle André
- Department of Pathology, Bordeaux University Hospital, Pellegrin Hospital, Bordeaux, France
| | - Fanny Pelluard
- Department of Pathology, Bordeaux University Hospital, Pellegrin Hospital, Bordeaux, France
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8
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Sauvestre F, Moutton S, Badens C, Broussin B, Carles D, Houcinat N, Lacoste C, Marguet F, Pecheux C, Villard L, Pelluard F, Laquerrière A, André G. In utero
seizures revealing dentato-olivary dysplasia caused by SCN2A
mutation. Neuropathol Appl Neurobiol 2017; 43:631-635. [DOI: 10.1111/nan.12409] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Revised: 04/05/2017] [Accepted: 05/10/2017] [Indexed: 11/28/2022]
Affiliation(s)
- F. Sauvestre
- Department of Pathology; Bordeaux University hospital; Bordeaux France
| | - S. Moutton
- Department of Medical Genetic; Bordeaux University Hospital; Bordeaux France
| | - C. Badens
- Department of Medical Genetic; APHM; Timone Hospital; Aix Marseille University; GMGF; Inserm; UMR 910; Marseille France
| | - B. Broussin
- Radiology center; 120 bis rue Georges Bonnac Bordeaux France
| | - D. Carles
- Department of Pathology; Bordeaux University hospital; Bordeaux France
| | - N. Houcinat
- Department of Medical Genetic; Bordeaux University Hospital; Bordeaux France
| | - C. Lacoste
- Department of Medical Genetic; APHM; Timone Hospital; Aix Marseille University; GMGF; Inserm; UMR 910; Marseille France
| | - F. Marguet
- Pathology Laboratory; Rouen University Hospital and Normandie University; UNIROUEN; NéoVasc; Rouen France
| | - C. Pecheux
- Department of Medical Genetic; APHM; Timone Hospital; Aix Marseille University; GMGF; Inserm; UMR 910; Marseille France
| | - L. Villard
- Department of Medical Genetic; APHM; Timone Hospital; Aix Marseille University; GMGF; Inserm; UMR 910; Marseille France
| | - F. Pelluard
- Department of Pathology; Bordeaux University hospital; Bordeaux France
| | - A. Laquerrière
- Pathology Laboratory; Rouen University Hospital and Normandie University; UNIROUEN; NéoVasc; Rouen France
| | - G. André
- Department of Pathology; Bordeaux University hospital; Bordeaux France
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9
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Abel J, Lamirand-Majimel M, Majimel J, Bellière-Baca V, Harlé V, André G, Prestipino C, Figueroa S, Durand E, Demourgues A. Oxygen non-stoichiometry phenomena in Pr1-xZrxO2-y compounds (0.02 < x < 0.5). Dalton Trans 2014; 43:15183-91. [PMID: 25184335 DOI: 10.1039/c4dt01545b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New Pr1-xZrxO2-y oxides with x < 0.5 have been prepared by co-precipitation in basic medium and annealed under air at high temperatures (T≤ 1200 °C). Defined compositions with x = 0.02, 0.1, 0.2, 0.35, 0.40 and 0.5 have been characterized by XRD, Zr-K-edge EXAFS for the local structure, magnetic susceptibility measurements, and Pr LIII-edge XANES in order to identify the variation of the cell parameter and Zr local environment versus Zr content and Pr(n+) (4 < n < 3) oxidation states. The higher the Zr content, the lower the Pr valence state. The Zr amount stabilized in the distorted octahedral site is at the origin of the formation of defined compositions as discovered by Leroy Eyring et al. in the PrnO2n-2m series and the generation of oxygen vacancies stabilized in the fluorite-type network. TGA and TPR analyses help to follow the reduction properties under Ar/5% H2 and show high Pr reducible rates at low temperatures (T < 250 °C). The identification of the fluorite-type superstructure (SG: Ia3[combining macron]) of reduced compositions annealed at T = 900 °C under Ar/5% H2 shows the cationic and oxygen vacancy ordering. This feature plays a key role with Zr(4+) cations stabilized in flattened octahedral sites for the generation of oxygen vacancies and the stabilization of Pr(3+) in the reduced states.
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Affiliation(s)
- J Abel
- CNRS, Université de Bordeaux 1, ICMCB, 87 avenue du Dr. Albert Schweitzer, 33608 Pessac, France.
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10
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Meshcheriakova O, Chadov S, Nayak AK, Rößler UK, Kübler J, André G, Tsirlin AA, Kiss J, Hausdorf S, Kalache A, Schnelle W, Nicklas M, Felser C. Large noncollinearity and spin reorientation in the novel Mn2RhSn Heusler magnet. Phys Rev Lett 2014; 113:087203. [PMID: 25192122 DOI: 10.1103/physrevlett.113.087203] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Indexed: 06/03/2023]
Abstract
Noncollinear magnets provide essential ingredients for the next generation memory technology. It is a new prospect for the Heusler materials, already well known due to the diverse range of other fundamental characteristics. Here, we present a combined experimental and theoretical study of novel noncollinear tetragonal Mn(2)RhSn Heusler material exhibiting unusually strong canting of its magnetic sublattices. It undergoes a spin-reorientation transition, induced by a temperature change and suppressed by an external magnetic field. Because of the presence of Dzyaloshinskii-Moriya exchange and magnetic anisotropy, Mn(2)RhSn is suggested to be a promising candidate for realizing the Skyrmion state in the Heusler family.
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Affiliation(s)
- O Meshcheriakova
- Graduate School of Excellence "Materials Science in Mainz" Johannes Gutenberg-Universtität, 55099 Mainz, Germany and Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Strasse 40, 01187 Dresden, Germany
| | - S Chadov
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Strasse 40, 01187 Dresden, Germany
| | - A K Nayak
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Strasse 40, 01187 Dresden, Germany
| | - U K Rößler
- Leibniz-Institut für Festkörper-und Werkstoffforschung IFW, Helmholtz Strasse 20, 01171 Dresden, Germany
| | - J Kübler
- Institut für Festkörperphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
| | - G André
- Laboratoire Léon Brillouin, CEA-CNRS Saclay, 91191 Gif-sur-Yvette Cedex, France
| | - A A Tsirlin
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Strasse 40, 01187 Dresden, Germany
| | - J Kiss
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Strasse 40, 01187 Dresden, Germany
| | - S Hausdorf
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Strasse 40, 01187 Dresden, Germany
| | - A Kalache
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Strasse 40, 01187 Dresden, Germany
| | - W Schnelle
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Strasse 40, 01187 Dresden, Germany
| | - M Nicklas
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Strasse 40, 01187 Dresden, Germany
| | - C Felser
- Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Strasse 40, 01187 Dresden, Germany
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11
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Knížek K, Jirák Z, Hejtmánek J, Veverka M, Kaman O, Maryško M, Santavá E, André G. Effect of Ising-type Tb3+ ions on the low-temperature magnetism of La, Ca cobaltite. J Phys Condens Matter 2014; 26:116003. [PMID: 24590179 DOI: 10.1088/0953-8984/26/11/116003] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Crystal and magnetic structures of the x = 0.2 member of the La0.8-xTbxCa0.2CoO3 perovskite series have been determined from powder neutron diffraction. Enhancement of the diffraction peaks due to ferromagnetic or cluster glass ordering is observed below TC = 55 K. The moments first evolve on Co sites, and ordering of Ising-type Tb(3+) moments is induced at lower temperatures by a molecular field due to Co ions. The final magnetic configuration is collinear Fx for the cobalt subsystem, while it is canted FxCy for terbium ions. The rare-earth moments align along local Ising axes within the ab-plane of the orthorhombic Pbnm structure. The behavior in external fields up to 70-90 kOe has been probed by magnetization and heat capacity measurements. The dilute terbium ions contribute to significant coercivity and remanence that both steeply increase with decreasing temperature. A remarkable manifestation of the Tb(3+) Ising character is the observation of a low-temperature region with an anomalously large linear term of heat capacity and its field dependence. Similar behaviors are detected also for other terbium dopings x = 0.1 and 0.3.
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Affiliation(s)
- K Knížek
- Institute of Physics ASCR, Cukrovarnická 10, 162 00 Prague 6, Czech Republic
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12
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Sauvestre F, Carles D, Faure M, Taillat F, Le Boulanger F, Castain C, André G, Pelluard F. [Incidental intraplacental gestational choriocarcinoma on a full-term placenta]. Ann Pathol 2014; 34:119-23. [PMID: 24703021 DOI: 10.1016/j.annpat.2014.02.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Revised: 11/19/2013] [Accepted: 02/02/2014] [Indexed: 11/30/2022]
Abstract
Of all the gestational trophoblastic tumors, the gestational choriocarcinomas have the worst prognosis and the most uncommon. We report a case diagnosed on a full-term placenta, discovered incidentally. The patient, gravida 2, para 1, delivered a hypotrophic infant at 38 weeks gestation. The placenta was examined in the laboratory to perform anatomo-pathological examination in order to explain the growth retardation. This study revealed the presence of an intraplacental choriocarcinoma. Disease staging was negative for both mother and child, and beta-HCG levels remained at zero. These two factors are rather good prognosis for choriocarcinoma. With this observation, we highlight the added-value of placental examination, which seems essential for any fetal pathology, pathological pregnancy and intrapartum complications. Anatomo-pathological examination must be meticulous and systematized in order to not overlook an intraplacental tumor.
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Affiliation(s)
- Fanny Sauvestre
- Unité de pathologie fœtoplacentaire, université Bordeaux-Segalen, 146, rue Léo-Saignat, 33076 Bordeaux cedex, France.
| | - Dominique Carles
- Unité de pathologie fœtoplacentaire, université Bordeaux-Segalen, 146, rue Léo-Saignat, 33076 Bordeaux cedex, France
| | - Martie Faure
- Service d'anatomie et cytologie pathologiques, hôpital Robert-Boulin, 112, rue de la Marne, 33505 Libourne cedex, France
| | - Floriane Taillat
- Service d'anatomie et cytologie pathologiques, hôpital Robert-Boulin, 112, rue de la Marne, 33505 Libourne cedex, France
| | - Fanny Le Boulanger
- Service de gynécologie, hôpital Robert-Boulin, 112, rue de la Marne, 33505 Libourne cedex, France
| | - Claire Castain
- Service d'anatomie et cytologie pathologiques, CHU Pellegrin, place Amélie-Raba-Léon, 33076 Bordeaux cedex, France
| | - Gwenaëlle André
- Unité de pathologie fœtoplacentaire, université Bordeaux-Segalen, 146, rue Léo-Saignat, 33076 Bordeaux cedex, France
| | - Fanny Pelluard
- Unité de pathologie fœtoplacentaire, université Bordeaux-Segalen, 146, rue Léo-Saignat, 33076 Bordeaux cedex, France
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13
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Abstract
Feto-maternal hemorrhage (FMH) is the cause of late fetal death in 1.6%-11% of cases. In spite of this high frequency, its pathological features have received little attention. The definitive diagnosis of lethal FMH requires confirmation of sufficient fetal blood volume loss. This is determined by tests such as the Kleihauer-Betke test, which may not have been obtained or not have been available before the autopsy. The pathologist may offer a tentative diagnosis of FMH from the autopsy findings. The objective of this study was to better characterize the placental and fetal autopsy findings in lethal FMH. This was a retrospective study of 17 cases of FMH proven by a positive Kleihauer-Betke test. The cases were selected from the autopsy files of the Department of Pathology, Centre Hospitalier Universitaire de Bordeaux. The pathological reports as well as the placental and fetal photographs and the microscopic slides of each case were systematically reviewed. The fetal autopsy findings in FMH are characterized by a eutrophic pale macerated fetus, low liver weight, absent intrathoracic petechiae, increased extramedullary hematopoiesis in the liver and kidney, and increased circulating nucleated red blood cells. The placenta shows an increased frequency of intervillous thrombi. Although nonpathognomonic, some of the pathological features are strongly suggestive of FMH. When the latter is present, a Kleihauer-Betke test should be performed, even some days after the delivery.
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Affiliation(s)
- Dominique Carles
- Department of Pathology, Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France
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14
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Carles D, Pelluard F, André G, Nocart N, Sauvestre F. [Aberrant right subclavian artery (arteria lusoria) and the risk for trisomy 21. Retrospective study of 11,479 fetopathological examinations]. ACTA ACUST UNITED AC 2013; 43:698-703. [PMID: 24332742 DOI: 10.1016/j.jgyn.2013.10.001] [Citation(s) in RCA: 3] [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: 05/25/2013] [Revised: 09/15/2013] [Accepted: 10/01/2013] [Indexed: 10/25/2022]
Abstract
OBJECTIVE The aberrant right subclavian artery is a malformation of the aortic arch present at less than 2 % of the individuals in the general population. This incidence is higher in trisomy 21, making it possible use the aberrant right subclavian artery as a prenatal marker of trisomy 21. MATERIAL AND METHODS This work, which relates to a series of 11,479 consecutive fetal autopsies aims to measure the force of association between the aberrant right subclavian artery and trisomy 21, to confront our results with the sonographic series previously published and to contribute to assess the place that can have this sign in the echographic screening and the fetopathologic diagnosis of trisomy 21. RESULTS The isolated presence of an aberrant right subclavian artery does not represent an argument sufficient for the indication of a karyotype. But the detection of this anomaly must make pay a special attention in search of other associated signs. CONCLUSION On the results of this study, the aberrant right subclavian artery has to be considered as a part of the spectrum not only of trisomy 21, but also of many other congenital syndromes.
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Affiliation(s)
- D Carles
- Unité de pathologie fœtoplacentaire, service d'anatomie pathologique, université Bordeaux-Segalen, CHU de Bordeaux, place Amélie-Raba-Léon, 33076 Bordeaux cedex, France.
| | - F Pelluard
- Unité de pathologie fœtoplacentaire, service d'anatomie pathologique, université Bordeaux-Segalen, CHU de Bordeaux, place Amélie-Raba-Léon, 33076 Bordeaux cedex, France
| | - G André
- Unité de pathologie fœtoplacentaire, service d'anatomie pathologique, université Bordeaux-Segalen, CHU de Bordeaux, place Amélie-Raba-Léon, 33076 Bordeaux cedex, France
| | - N Nocart
- Unité de pathologie fœtoplacentaire, service d'anatomie pathologique, université Bordeaux-Segalen, CHU de Bordeaux, place Amélie-Raba-Léon, 33076 Bordeaux cedex, France
| | - F Sauvestre
- Unité de pathologie fœtoplacentaire, service d'anatomie pathologique, université Bordeaux-Segalen, CHU de Bordeaux, place Amélie-Raba-Léon, 33076 Bordeaux cedex, France
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15
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Carles D, Pelluard F, André G, Naudion S, Poingt M, Castain C, Sauvestre F. Anatomie pathologique de l’insuffisance vasculaire utéroplacentaire. Ann Pathol 2013; 33:230-6. [DOI: 10.1016/j.annpat.2013.04.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Revised: 04/13/2013] [Accepted: 04/21/2013] [Indexed: 12/27/2022]
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de Mol R, André G, Bleumer E, van der Werf J, de Haas Y, van Reenen C. Applicability of day-to-day variation in behavior for the automated detection of lameness in dairy cows. J Dairy Sci 2013; 96:3703-12. [DOI: 10.3168/jds.2012-6305] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2012] [Accepted: 02/16/2013] [Indexed: 11/19/2022]
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17
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Retuerto M, Muñoz A, Martínez-Lope MJ, Garcia-Hernandez M, André G, Krezhov K, Alonso JA. Influence of the Bi3+ electron lone pair in the evolution of the crystal and magnetic structure of La(1-x)Bi(x)Mn2O5 oxides. J Phys Condens Matter 2013; 25:216002. [PMID: 23628956 DOI: 10.1088/0953-8984/25/21/216002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
La(1-x)Bi(x)Mn2O5 (x = 0, 0.2, 0.4, 0.6, 0.8 and 1) oxides are members of the RMn2O5 family. The entire series has been prepared in polycrystalline form by a citrate technique. The evolution of their magnetic and crystallographic structures has been investigated by neutron powder diffraction (NPD) and magnetization measurements. All the samples crystallize in an orthorhombic structure with space group Pbam containing infinite chains of Mn(4+)O6 octahedra sharing edges, linked together by Mn(3+)O5 pyramids and (La/Bi)O8 units. These units become strongly distorted as the amount of Bi increases, due to the electron lone pair of Bi(3+). All the members of the series are magnetically ordered below TN = 25-40 K and they present different magnetic structures. For the samples with low Bi content (x = 0.2 and 0.4) the magnetic structure is characterized by the propagation vector k = (0,0,1/2). The magnetic moments of the Mn(4+) ions placed at octahedral sites are ordered according to the basis vectors (Gx, Ay, 0) whereas the Mn(3+) moments, located at pyramidal sites, are ordered according to the basis vectors (0, 0, Cz). When the content of Bi increases, two different propagation vectors are needed to explain the magnetic structure: k1 = (0,0,1/2) and k2 = (1/2,0,1/2). For x = 0.6 and 0.8, k2 is predominant over k1 and for this propagation vector (k2) the magnetic arrangement is defined by the basis vectors (Gx, Ay,0) and (Fx, Cy, 0) for Mn(4+) and Mn(3+) ions, respectively.
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Affiliation(s)
- M Retuerto
- Department of Chemistry, Rutgers State University of New Jersey, Piscataway, NJ 08854-8087, USA.
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18
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Knoll R, Shames A, Goren SD, Shaked H, Cordier S, Perrin C, Hernandez O, Roisnel T, André G, Kremer RK, Simon A. Antiferromagnetic Ordering of Magnetic Clusters Units in Nb(6)F(15). Appl Magn Reson 2013; 44:143-151. [PMID: 23349566 PMCID: PMC3549236 DOI: 10.1007/s00723-012-0426-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2012] [Indexed: 06/01/2023]
Abstract
We have studied the magnetic cluster compound Nb(6)F(15) which has an odd number of 15 valence electrons per (Nb(6)F(12))(3+) cluster core, as a function of temperature using nuclear magnetic resonance, magnetic susceptibility, electron magnetic resonance and neutron powder diffraction. Nuclear magnetic resonance of the (19)F nuclei shows two lines corresponding to the apical F(a-a) nucleus, and to the inner F(i) nuclei. The temperature dependence of the signal from the F(i) nuclei reveals an antiferromagnetic ordering at T < 5 K, with a hyperfine field of ~2 mT. Magnetic susceptibility exhibits a Curie-Weiss behavior with T(N) ~5 K, and μ(eff) ~1.57 μ(B) close to the expected theoretical value for one unpaired electron (1.73 μ(B)). Electron magnetic resonance linewidth shows a transition at 5 K. Upon cooling from 10 to 1.4 K, the neutron diffraction shows a decrease in the intensity of the low-angle diffuse scattering below Q ~0.27 Å(-1). This decrease is consistent with emergence of magnetic order of large magnetic objects (clusters). This study shows that Nb(6)F(15) is paramagnetic at RT and undergoes a transition to antiferromagnetic order at 5 K. This unique antiferromagnetic ordering results from the interaction between magnetic spins delocalized over each entire (Nb(6)F(12) (i))(3+) cluster core, rather than the common magnetic ordering.
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Affiliation(s)
- R. Knoll
- Department of Physics, Ben Gurion University, P.O. Box 653, 84105 Beer Sheva, Israel
| | - A. Shames
- Department of Physics, Ben Gurion University, P.O. Box 653, 84105 Beer Sheva, Israel
| | - S. D. Goren
- Department of Physics, Ben Gurion University, P.O. Box 653, 84105 Beer Sheva, Israel
| | - H. Shaked
- Department of Physics, Ben Gurion University, P.O. Box 653, 84105 Beer Sheva, Israel
| | - S. Cordier
- Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Avenue du Général Leclerc, Bât. 10A/10B, 35042 Rennes Cedex, France
| | - C. Perrin
- Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Avenue du Général Leclerc, Bât. 10A/10B, 35042 Rennes Cedex, France
| | - O. Hernandez
- Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Avenue du Général Leclerc, Bât. 10A/10B, 35042 Rennes Cedex, France
| | - T. Roisnel
- Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Avenue du Général Leclerc, Bât. 10A/10B, 35042 Rennes Cedex, France
| | - G. André
- CEA/Saclay, 91191 Gif-sur-Yvette Cedex, France
| | - R. K. Kremer
- Max-Planck-Inst. f. Festkörperforschung, Heisenbergst. 1, 7000 Stuttgart 80, Germany
| | - A. Simon
- Max-Planck-Inst. f. Festkörperforschung, Heisenbergst. 1, 7000 Stuttgart 80, Germany
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Carles D, Boucard C, Baudoin B, Pelluard F, André G, Naudion S, Legendre M. [Cardiac tamponade with anterior interventricular vein thrombosis complicating central venous catheter insertion in a neonate]. Ann Pathol 2012; 32:217-9. [PMID: 22748341 DOI: 10.1016/j.annpat.2011.10.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2010] [Revised: 06/14/2011] [Accepted: 10/24/2011] [Indexed: 11/17/2022]
Abstract
Tamponade is a rare but particularly serious complication of central venous catheters in the newborn. Tamponade can be due to the endocardic aggression caused by the continuous flow of a hyperosmotic solution or by a mechanical injury that can result in perforation of the atrial wall. The risk of tamponade is present whatever is the position of the tip of the catheter, although it has been shown that this risk is increased when this tip is in the right auricle. The originality of our observation is the discovery at the post-mortem examination of an anterior interventricular vein thrombosis, without any lesion of the atrial wall. In the event of the diagnosis of tamponade in living newborn, this etiology must be required because of its therapeutic implications.
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Affiliation(s)
- Dominique Carles
- Unité de pathologie fœtoplacentaire, université Bordeaux-Segalen, 146 rue Léo-Saignat, Bordeaux cedex, France.
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Mayer C, Gaudin E, Gorsse S, Porcher F, André G, Chevalier B. Magnetic structure of the ferromagnetic new ternary silicide Nd5CoSi2. J Phys Condens Matter 2012; 24:136001. [PMID: 22392874 DOI: 10.1088/0953-8984/24/13/136001] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Nd(5)CoSi(2) was obtained from the elements by arc-melting followed by annealing at 883 K. Its investigation by single-crystal x-ray and neutron powder diffraction shows that this ternary silicide crystallizes as Nd(5)Si(3) in a tetragonal structure deriving from the Cr(5)B(3)-type (I4/mcm space group; a = 7.7472(2) and c = 13.5981(5) Å as unit cell parameters). The structural refinements confirm the mixed occupancy on the 8h site between Si and Co atoms, as already observed for Gd(5)CoSi(2). Magnetization and specific heat measurements reveal a ferromagnetic behavior below T(C) = 55 K for Nd(5)CoSi(2). This magnetic ordering is further evidenced by neutron powder diffraction investigation revealing between 1.8 K and T(C) a canted ferromagnetic structure in the direction of the c-axis described by a propagation vector k = (0 0 0). At 1.8 K, the two Nd(3+) ions carry ordered magnetic moments equal respectively to 1.67(7) and 2.37(7) μ(B) for Nd1 and Nd2; these two moments exhibit a canting angle of θ = 4.3(6)°. This magnetic structure presents some similarities with that reported for Nd(5)Si(3).
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Affiliation(s)
- C Mayer
- CNRS, Université de Bordeaux, ICMCB, 87 avenue du Docteur Albert Schweitzer, 33608 Pessac Cedex, France
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Muñoz A, Alonso JA, Martínez-Lope MJ, Pomjakushin V, André G. On the magnetic structure of PrMn2O5: a neutron diffraction study. J Phys Condens Matter 2012; 24:076003. [PMID: 22252102 DOI: 10.1088/0953-8984/24/7/076003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The long-range magnetic ordering of PrMn(2)O(5) has been studied on polycrystalline samples from neutron diffraction and specific heat measurements. The onset of antiferromagnetic ordering is observed at T(N) ≈ 25 K. In the temperature interval 18 K < T < 25 K the magnetic structure is defined by the propagation vector k(1) = (1/2,0,0). Below 18 K, some additional magnetic satellites appear in the NPD patterns, which are indexed with k(2) = (0,0,1/2). Therefore, below 18 K the magnetic structure consists of two independent magnetic domains, defined by the propagation vectors k(1) and k(2). The magnetic structure of the k(1)-domain is given by the basis vectors (C(x),0,0) and (C(x)',0,0) for Mn(4h) and Mn(4f), respectively. In the k(2)-domain, the magnetic structure is defined by the basis vectors (0,0,G(z)) and (F(x)',G(y)',0) for Mn(4h) and Mn(4f), respectively. At T = 1.5 K, for the magnetic phase associated with k(1), the magnetic moments of the Mn atoms at the 4h and 4f sites are 1.82(7) and 1.81(6) μ(B), respectively; for the magnetic phase associated with k(2), the magnetic moments for the Mn(4h) and Mn(4f) atoms are 0.59(5) and 2.62(5) μ(B), respectively.
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Affiliation(s)
- A Muñoz
- Departamento Física Aplicada, EPS, Universidad Carlos III, Madrid, Spain.
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Josse M, El-Ghozzi M, Avignant D, André G, Bourée F, Isnard O. Magnetic behaviour of the MTbF6 fluoroterbates (M=Cd, Ca, Sr, (α/β)-Ba). J SOLID STATE CHEM 2012. [DOI: 10.1016/j.jssc.2011.10.030] [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: 11/28/2022]
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André G, Engel B, Berentsen PBM, Vellinga TV, Lansink AGJMO. Quantifying the effect of heat stress on daily milk yield and monitoring dynamic changes using an adaptive dynamic model. J Dairy Sci 2011; 94:4502-13. [PMID: 21854922 DOI: 10.3168/jds.2010-4139] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2010] [Accepted: 05/30/2011] [Indexed: 11/19/2022]
Abstract
Automation and use of robots are increasingly being used within dairy farming and result in large amounts of real time data. This information provides a base for the new management concept of precision livestock farming. From 2003 to 2006, time series of herd mean daily milk yield were collected on 6 experimental research farms in the Netherlands. These time series were analyzed with an adaptive dynamic model following a Bayesian method to quantify the effect of heat stress. The effect of heat stress was quantified in terms of critical temperature above which heat stress occurred, duration of heat stress periods, and resulting loss in milk yield. In addition, dynamic changes in level and trend were monitored, including the estimation of a weekly pattern. Monitoring comprised detection of potential outliers and other deteriorations. The adaptive dynamic model fitted the data well; the root mean squared error of the forecasts ranged from 0.55 to 0.99 kg of milk/d. The percentages of potential outliers and signals for deteriorations ranged from 5.5 to 9.7%. The Bayesian procedure for time series analysis and monitoring provided a useful tool for process control. Online estimates (based on past and present only) and retrospective estimates (determined afterward from all data) of level and trend in daily milk yield showed an almost yearly cycle that was in agreement with the calving pattern: most cows calved in winter and early spring versus summer and autumn. Estimated weekly patterns in terms of weekday effects could be related to specific management actions, such as change of pasture during grazing. For the effect of heat stress, the mean estimated critical temperature above which heat stress was expected was 17.8±0.56°C. The estimated duration of the heat stress periods was 5.5±1.03 d, and the estimated loss was 31.4±12.2 kg of milk/cow per year. Farm-specific estimates are helpful to identify management factors like grazing, housing and feeding, that affect the impact of heat stress. The effect of heat stress can be decreased by modifying these factors.
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Affiliation(s)
- G André
- Livestock Research, Wageningen University and Research Centre, Lelystad, the Netherlands.
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Jamin C, André G, Audebert A, Christin-Maître S, Elia D, Harvey T, Letombe B, Lopes P, Moreau C, Nisand I, Pélissier C. Oublis de la contraception hormonale : réflexions sur leur prise en charge en pratique quotidienne. ACTA ACUST UNITED AC 2011; 39:644-55. [DOI: 10.1016/j.gyobfe.2011.08.031] [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] [Received: 06/26/2011] [Accepted: 07/31/2011] [Indexed: 10/16/2022]
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Tellgren R, Ivanov S, Nordblad P, Mathieu R, Ritter C, André G. The magnetic ordering in Mn 3TeO 6and Co 3TeO 6. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311082870] [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: 11/11/2022] Open
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Paul-Boncour V, Filipek S, Sato R, Wierzbicki R, André G, Porcher F, Reissner M, Wiesinger G. Structural and magnetic properties of RMn2−Fe D6 compounds (R=Y, Er; x≤0.2) synthesized under high deuterium pressure. J SOLID STATE CHEM 2011. [DOI: 10.1016/j.jssc.2010.12.017] [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: 10/18/2022]
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Golosovsky IV, Naberezhnov AA, Kurdyukov DA, Mirebeau I, André G. Temperature evolution of copper oxide nanoparticles in porous glasses. CRYSTALLOGR REP+ 2011. [DOI: 10.1134/s1063774510051025] [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: 11/22/2022]
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van Duinkerken G, Smits M, André G, Šebek L, Dijkstra J. Milk urea concentration as an indicator of ammonia emission from dairy cow barn under restricted grazing. J Dairy Sci 2011; 94:321-35. [DOI: 10.3168/jds.2009-2263] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2009] [Accepted: 09/07/2010] [Indexed: 11/19/2022]
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Wells DM, Ringe E, Kaczorowski D, Gnida D, André G, Haire RG, Ellis DE, Ibers JA. Structure, Properties, and Theoretical Electronic Structure of UCuOP and NpCuOP. Inorg Chem 2010; 50:576-89. [DOI: 10.1021/ic101665g] [Citation(s) in RCA: 7] [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: 11/30/2022]
Affiliation(s)
- Daniel M. Wells
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
- Materials Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Emilie Ringe
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - D. Kaczorowski
- Institue of Low Temperature and Structure Research, Polish Academy of Sciences, 50-950 Wroclaw, Poland
| | - D. Gnida
- Institue of Low Temperature and Structure Research, Polish Academy of Sciences, 50-950 Wroclaw, Poland
| | - G. André
- Laboratoire Léon Brillouin, CE-Saclay, 91191 Gif sur Yvette Cedex, France
| | - Richard G. Haire
- Chemical Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Donald E. Ellis
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
- Materials Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
- Department of Physics & Astronomy, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - James A. Ibers
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
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Tunon-de-Lara C, André G, MacGrogan G, Dilhuydy JM, Bussières JE, Debled M, Mauriac L, Brouste V, de Mascarel I, Avril A. Ductal Carcinoma In Situ of the Breast: Influence of Age on Diagnostic, Therapeutic, and Prognostic Features. Retrospective Study of 812 Patients. Ann Surg Oncol 2010; 18:1372-9. [DOI: 10.1245/s10434-010-1441-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2010] [Indexed: 11/18/2022]
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Blanc F, Poisbeau P, Sellal F, Tranchant C, de Seze J, André G. [Alzheimer disease, memory and estrogen]. Rev Neurol (Paris) 2010; 166:377-88. [PMID: 19836813 DOI: 10.1016/j.neurol.2009.07.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [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: 07/06/2008] [Revised: 04/18/2009] [Accepted: 07/15/2009] [Indexed: 11/19/2022]
Abstract
Epidemiological studies of Alzheimer disease have shown a higher prevalence of women. Some data argue for a link between Alzheimer disease and the decrease of estrogen in post-menopausal women. Animal studies have shown a beneficial effect of estrogen on memory with a decrease of amyloid deposition in models of AD, whereas estrogen has a positive effect on BDNF. Six studies have shown a positive effect of estrogen therapy on memory and studies on structural and functional imaging have shown a beneficial effect of estrogens but the largest study on prevention of dementia with estrogens (WHI) showed a deleterious effect. To better understand this paradoxical situation, we reviewed the literature on estrogens, memory and Alzheimer disease. We first discuss the promnesic effect of estrogen on mice and rats, second the neuroprotector effect of estrogen on animal models of Alzheimer disease, and third the available human studies. We hypothesize a link with the time of instauration of the estrogen treatment. Nevertheless this hypothesis remains to be demonstrated.
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Affiliation(s)
- F Blanc
- Service de Neuropsychologie, Département de Neurologie, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
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André G, Berentsen P, Engel B, de Koning C, Oude Lansink A. Increasing the revenues from automatic milking by using individual variation in milking characteristics. J Dairy Sci 2010; 93:942-53. [DOI: 10.3168/jds.2009-2373] [Citation(s) in RCA: 39] [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] [Received: 05/12/2009] [Accepted: 09/23/2009] [Indexed: 11/19/2022]
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33
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Chevalier B, Tencé S, André G, Matar SF, Gaudin E. From antiferromagnetic to ferromagnetic ordering induced by hydrogenation of the compounds NdCoSi and NdCoGe. ACTA ACUST UNITED AC 2010. [DOI: 10.1088/1742-6596/200/3/032012] [Citation(s) in RCA: 6] [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: 11/11/2022]
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34
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Carles D, Pelluard F, André G, Naudion S, Saura R. [Maze-like vascular anomaly in partial mole. Interest for the pathological diagnosis of partial mole on chorionic villous sampling]. Ann Pathol 2009; 29:424-7. [PMID: 20004848 DOI: 10.1016/j.annpat.2009.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/15/2009] [Indexed: 10/20/2022]
Abstract
A case of maze-like angiomatoid anomaly in villi obtained by chorionic villous sampling (CVS) is described. This feature is pathognomonic of partial mole (triploid syndrome) and it was later confirmed by chromosomal analysis. Maze-like angiomatoid anomaly was previously described on specimen submitted after spontaneous or induced abortions, but it was never reported on CVS. This report emphasized that microscopic investigation of CVS cannot be conclusive for cytogenetic anomaly in almost all cases excepted for partial mole where diagnosis criteria are usually characteristic.
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Affiliation(s)
- Dominique Carles
- Université Victor-Segalen Bordeaux-2, CHU de Bordeaux, Bordeaux cedex, France.
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35
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Bazin D, Chappard C, Combes C, Carpentier X, Rouzière S, André G, Matzen G, Allix M, Thiaudière D, Reguer S, Jungers P, Daudon M. Diffraction techniques and vibrational spectroscopy opportunities to characterise bones. Osteoporos Int 2009; 20:1065-75. [PMID: 19340497 DOI: 10.1007/s00198-009-0868-3] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- D Bazin
- Laboratoire de Physique des Solides, Bat 510, Université Paris XI, 91405 Orsay, France.
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Paul-Boncour V, Filipek SM, Wierzbicki R, André G, Bourée F, Guillot M. Structural and magnetic properties of DyMn(2)D(6) synthesized under high deuterium pressure. J Phys Condens Matter 2009; 21:016001. [PMID: 21817238 DOI: 10.1088/0953-8984/21/1/016001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
DyMn(2)D(6) has been prepared by applying high gaseous deuterium pressure on DyMn(2). This phase is isostructural with other RMn(2)D(6) (R = Y, Er) compounds and crystallizes with a K(2)PtCl(6) type structure having an ordered anion and a partially disordered cation arrangement because Dy and half the Mn atoms are randomly substituted in the same 8c site. The reverse susceptibility follows a Curie-Weiss law with an effective moment of 10 μ(B) similar to that of DyMn(2). Short range magnetic order, corresponding to ferromagnetic correlations, is observed in the neutron patterns up to 10 K and can be attributed to Dy-Dy interactions. The decomposition of the deuteride into Mn and DyD(2), studied by thermal gravimetric analysis, occurs between 470 and 650 K. A further deuterium desorption takes place above 920 K.
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Affiliation(s)
- V Paul-Boncour
- Laboratoire de Chimie Métallurgique des Terres Rares, CNRS, 2-8 rue H Dunant, 94320 Thiais, France
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Brun JL, André G, Descat E, Creux H, Vigier J, Dallay D. Modalités et efficacité des traitements médicaux et chirurgicaux devant des ménométrorragies organiques. ACTA ACUST UNITED AC 2008; 37 Suppl 8:S368-83. [DOI: 10.1016/s0368-2315(08)74778-1] [Citation(s) in RCA: 8] [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: 11/29/2022]
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Raichle M, Reehuis M, André G, Capogna L, Sofin M, Jansen M, Keimer B. Incommensurate spin-density modulation in a copper oxide chain compound with commensurate charge order. Phys Rev Lett 2008; 101:047202. [PMID: 18764362 DOI: 10.1103/physrevlett.101.047202] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2008] [Indexed: 05/26/2023]
Abstract
Neutron diffraction has been used to determine the magnetic structure of Na8Cu5O10, a stoichiometric compound containing chains based on edge-sharing CuO4 plaquettes. The chains are doped with 2/5 hole per Cu site and exhibit long-range commensurate charge order with an onset well above room temperature. Below TN=23 K, the neutron data indicate long-range collinear magnetic order with a spin-density modulation whose propagation vector is commensurate along, and incommensurate perpendicular to, the chains. Competing interchain exchange interactions are discussed as a possible origin of the incommensurate magnetic order.
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Affiliation(s)
- M Raichle
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, D-70569 Stuttgart, Germany
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van Krimpen MM, Kwakkel RP, André G, van der Peet-Schwering CMC, den Hartog LA, Verstegen MWA. Effect of nutrient dilution on feed intake, eating time and performance of hens in early lay. Br Poult Sci 2007; 48:389-98. [PMID: 17701492 DOI: 10.1080/00071660701509619] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [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: 10/23/2022]
Abstract
1. An experiment with 480 ISA Brown layers was conducted to measure the effect of dietary energy (11.8, 11.2 and 10.6 MJ/kg) and non-starch polysaccharides (NSP) (128, 146 and 207 g/kg) concentration, soluble NSP content (64 and 85 g/kg), particle size distribution of the NSP fraction (fine and coarse) and feed form (mash and crumble) on feed intake, eating time and egg performance of laying hens in early lay (from 18 to 26 weeks of age). Twelve experimental diets were tested, each replicated 4 times. 2. Laying hens in early lay that were fed low- or high-NSP diets were able to compensate for 10% dietary dilution by 9.5 and 4.9% higher feed intakes, respectively. Feeding crumble or coarsely ground mash did not affect feed intake. 3. Eating time of the hens fed the undiluted diets increased over the experimental period from 16.4 to 24.6% of the observation period, but was not affected by sand or grit addition, particle size distribution or feed form. Feeding high-NSP diets increased eating time by 22%. 4. Egg performance and body weight gain of the hens that were fed low-NSP or high-NSP diets were similar or better compared to the undiluted diets, whereas coarse grinding of the diets showed 7 to 10% lower egg performance and weight gain. Egg performance and weight gain were not affected by feed form. 5. It is concluded that hens in early lay, fed energy-diluted diets, by adding sand or grit (low-NSP) or NSP-rich raw materials (high-NSP) to the control diet, were able to increase their feed intake, resulting in energy intake and egg performance comparable to the control group. Supplementing diets with insoluble NSP also decreased eating rate. Prolonged eating time using insoluble NSP could be useful in reducing feather pecking behaviour.
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Affiliation(s)
- M M van Krimpen
- Animal Production, Animal Sciences Group, Wageningen UR, Lelystad, the Netherlands.
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Elerman Y, Dincer I, Ehrenberg H, Fuess H, André G, Elmali A. Coexistence of the canted ferromagnetism and canted antiferromagnetism in La 0.6Pr 0.4Mn 2Si 2. Acta Crystallogr A 2007. [DOI: 10.1107/s0108767307094159] [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: 11/10/2022] Open
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Josse M, El-Ghozzi M, Avignant D, André G, Bourée F. Magnetic structures of the M2TbF6 (M=Li, K, Rb) fluorides: A complex behavior resulting from frustration. J SOLID STATE CHEM 2007. [DOI: 10.1016/j.jssc.2007.02.011] [Citation(s) in RCA: 4] [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: 10/23/2022]
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Bogdanova AN, Irodova AV, André G. Saturated hydrides in the HfV2-D system. CRYSTALLOGR REP+ 2007. [DOI: 10.1134/s1063774507030182] [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: 11/23/2022]
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André G, Tunon-de-Lara C, Macgrogan G, Laharie-Mineur H, Bussieres JE, Valentin F, Barreau B, Dilhuydy MH, Dilhuydy JM, Mauriac L, Debled M, Durand M, Mathoulin S, Avril A. [Bilateral ductal carcinoma in situ of the breast: independent events or bilateral disease?]. ACTA ACUST UNITED AC 2007; 36:260-6. [PMID: 17376610 DOI: 10.1016/j.jgyn.2007.02.002] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2006] [Revised: 01/08/2007] [Accepted: 02/06/2007] [Indexed: 11/19/2022]
Abstract
OBJECTIVES In a retrospective study of bilateral Ductal Carcinoma In Situ (DCIS), cases were analysed to determine the relationship between the two events. MATERIAL AND METHODS From 1971 to 2001, among 812 patients with DCIS in Bergonie Institute, 78 suffering from bilateral DCIS and only19 were treated entirely in our institute. It was either synchronous DCIS or asynchronous (before 6 months). We realised a comparative study between, clinical and pathological characteristics of each DCIS. RESULTS In case of asynchronous DCIS, contra lateral DCIS occurred after a median 75-months period and until 22 years after the first event. We found at least for one histological subtype an agreement in 53% of cases. In 31% of cases, the grade was the same. For low plus intermediary grade versus high grade, the agreement was 53%. There was a subtype and grade agreement of 32% and a subtype or grade agreement in 63% of cases. CONCLUSION Histological agreement between the two lesions indicated the possible existence of in situ bilateral disease in these women. The local relapse rate was 20% and all of them were invasive. The risk of relapse in controlateral breast is high and patient needs a long follow up even in case of mastectomy.
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Affiliation(s)
- G André
- Service de Chirurgie, Institut Bergonié, 229, Cours de l'Argonne, Bordeaux, France
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Mouallem-Bahout M, Roisnel T, Bourée F, André G, Moure C, Peña O. Neutron diffraction evidence for a cationic order in the REMn0.5Ni0.5O3 (RE=La, Nd) and YMn0.5Co0.5O3 perovskites. PROG SOLID STATE CH 2007. [DOI: 10.1016/j.progsolidstchem.2007.01.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Bazin D, Daudon M, Chevallier P, Rouziere S, Elkaim E, Thiaudiere D, Fayard B, Foy E, Albouy PA, André G, Matzen G, Veron E. [Synchrotron radiation techniques for structural characterisation of biological entities: an example with renal stone analysis]. Ann Biol Clin (Paris) 2006; 64:125-39. [PMID: 16556523] [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: 12/21/2005] [Accepted: 01/12/2006] [Indexed: 05/08/2023]
Abstract
This paper describes the opportunities given by the synchrotron radiation techniques regarding the structural characterisation of biological entities. After a short recall on the characteristics of the synchrotron radiation, are described the experimental devices based on fluorescence X, wide angle X-ray scattering and X-ray absorption spectroscopy, which may applied for biological samples, especially in the field of stone analysis. Recent progresses in medical research using synchrotron radiation will be also discussed.
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Affiliation(s)
- D Bazin
- Laboratoire de Physique des Solides, Université Paris XI, Orsay
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Braden M, Friedt O, Schumann O, Baier J, Steffens P, Kriener M, Lorenz T, Bouree F, André G, Gukasov A, Radaelli PG, Nakatsuji S, Maeno Y. The phase diagram of Ca 2-xSr xRuO 4: crystal structure and physical properties. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305099423] [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: 11/10/2022] Open
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Bogdanova AN, Irodova AV, André G, Bourée F. Structure transformations in the saturated hydrides ZrV 2H 4 < x < 6. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305086435] [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: 11/10/2022] Open
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Tseggai M, Mathieu R, Nordblad P, Tellgren R, Bau L, Nam D, Phuc N, Khiem N, André G, Bourée F. Effects of magnesium substitution on the magnetic properties of Nd0.7Sr0.3MnO3. J SOLID STATE CHEM 2005. [DOI: 10.1016/j.jssc.2005.01.018] [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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Abstract
UNLABELLED As the biological effects of progestins vary according to their molecular structure, it becomes essential to differentiate the various types of progestins, particularly with regard to the breast. OBJECTIVE The purpose of this review was to gather published data on the effects of a 19-norprogesterone derivative, nomegestrol acetate, on the breast. Materials and methods. All experimental and clinical published studies reporting data in the literature on nomegestrol acetate and breast were reviewed. RESULTS In experiments on steroid receptors, it was shown that nomegestrol acetate presents a high binding specificity and affinity for progesterone receptors, notably in normal and cancerous human breast tissues. It sharply inhibits synthesis of progesterone receptors in hormone-dependent T-47D human breast cancer cells grown in an estrogenic culture medium, thereby demonstrating its strong progestational activity. On the other hand, it does not bind to estrogen receptors and lacks any estrogenic potential, confirmed by the lack of induction of alkaline phosphatase activity of endometrial Ishikawa cells. Estrogen-induced synthesis of estrogen receptors is also inhibited by nomegestrol acetate, a major determinant of its strong intrinsic anti-estrogenic activity. Unlike androgenic progestins (e.g. 19-nortestosterone derivatives and medroxyprogesterone acetate) which may act indirectly on the breast by inducing modifications of sex hormone binding globulin (SHBG) and insulin-like growth factor-I (IGF-I), nomegestrol acetate is devoid of any androgenic activity. In studies carried out on the effects of progestins on enzyme activities involved in estradiol (E2) formation in breast tissue, nomegestrol acetate can control E2 levels in breast cancer tissue in vitro: it inhibits estrone sulfatase activity that converts estrone sulfate (E1S) to estrone (E1) and inhibits 17beta-hydroxysteroid dehydrogenase type 1 activity that converts E1 to E2, resulting in blockade of E2 bioformation in MCF-7 and T-47D human breast cancer cells. It also stimulates sulfotransferase activity and subsequently the transformation of non conjugated estrogens E1 and E2 into biologically inactive estrogen sulfates. In vitro studies on cell proliferation have demonstrated that nomegestrol acetate, on the one hand, is unable to stimulate proliferation of MCF-7 cells cultured in a medium devoid of estrogens and, on the other hand, can exert antiproliferative effects on T-47D cells grown in an estrogenic environment. Furthermore, studies on mammary apoptosis have shown that the withdrawal of nomegestrol acetate induces apoptosis peak of normal human breast epithelial cells in vitro and in vivo. In clinical trials carried out with premenopausal women, nomegestrol acetate administered in antigonadotropic sequence has demonstrated its efficacy in the treatment of cyclical mastodynia and early onset benign breast diseases. With postmenopausal hormone replacement therapy (HRT) combining estrogen and nomegestrol acetate, clinical trial results showed low incidence of mastodynia while under treatment as well as moderate increase in mammographic density, particularly with continuous combined regimens, however rapidly reversed by a short-term suspension of HRT. Noclinical data with this progestagen is available on breast cancer risk. CONCLUSION In addition to efficacy on mastodynia, in vitro and in vivo study results support the good tolerance of nomegestrol acetate on breast, in the short and medium term.
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van Duinkerken G, André G, Smits MCJ, Monteny GJ, Sebek LBJ. Effect of Rumen-Degradable Protein Balance and Forage Type on Bulk Milk Urea Concentration and Emission of Ammonia from Dairy Cow Houses. J Dairy Sci 2005; 88:1099-112. [PMID: 15738244 DOI: 10.3168/jds.s0022-0302(05)72777-6] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
As the Dutch government and dairy farming sector have given priority to reducing ammonia emission, the effect of diet on the ammonia emission from dairy cow barns was studied. In addition, the usefulness of milk urea content as an indicator of emission reduction was evaluated. An experiment was carried out with a herd of 55 to 57 Holstein-Friesian dairy cows housed in a naturally ventilated barn with cubicles and a slatted floor. The experiment was designed as a 3 x 3 factorial trial and repeated 3 times. During the experiment, cows were confined to the barn (no grazing) and were fed ensiled forages and additional concentrates. The default forage was grass silage. The nutritional experimental factors were: (1) rumen-degradable protein balance of the ration for lactating cows with 3 levels (0, 500, and 1000 g/cow per d), and (2) proportion of corn silage in the forage ration for lactating cows with 3 levels (0, 50, and 100%) of forage dry matter intake. Several series of dynamic regression models were fitted. One of these models explained emission of ammonia by the nutritional factors and the temperature; another model explained ammonia emission by the bulk milk urea content and the temperature. The ammonia emission from the barn increased when levels of rumen-degradable protein balance increased. Furthermore, at a given level of rumen-degradable protein balance, the emission of ammonia correlated positively with the corn silage content in the forage ration. However, this correlation was not causal, but was the result of interaction between corn silage proportion and intake of ileal digestible protein. The bulk milk urea content and the temperature correlated strongly with the ammonia emission from the barn; the selected model accounted for 76% of the variance in emission. It was concluded that the emission of ammonia from naturally ventilated dairy cow barns was strongly influenced by diet. The emission can be reduced approximately 50% by reducing the rumen-degradable protein balance of the ration from 1000 to 0 g/cow per d. The milk urea content is a good indicator of emission reduction.
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Affiliation(s)
- G van Duinkerken
- Animal Sciences Group, Applied Research, Agrisystems and Environment, Wageningen University and Research Center, Wageningen, the Netherlands.
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