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Paillat L, Coutant K, Dutilleul M, Le Lay S, Camus A. Three-dimensional culture model to study the biology of vacuolated notochordal cells from mouse nucleus pulposus explants. Eur Cell Mater 2023; 45:72-87. [PMID: 36866514 DOI: 10.22203/ecm.v045a06] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/04/2023] Open
Abstract
Intervertebral disc degeneration (IDD) involves cellular changes in the nucleus pulposus (NP) characterised by a decline of the large vacuolated notochordal cells (vNCs) and a rise of smaller vacuole-free mature chondrocyte-like NP cells. An increasing number of studies demonstrate that notochordal cells (NCs) exert disease-modifying effects, establishing that NC-secreted factors are essential for the maintenance of a healthy intervertebral disc (IVD). However, understanding the role of the NCs is hampered by a restricted reserve of native cells and the lack of robust ex vivo cell model. A precise dissection enabled the isolation of NP cells from 4 d post-natal stage mouse spines and their culture into self-organised micromasses. The maintenance of cells' phenotypic characteristics was demonstrated by the presence of intracytoplasmic vacuoles and the immuno-colocalisation of the NC-markers (brachyury; SOX9) after 9 d of culture both in hypoxic and normoxic conditions. A significant increase of the size of the micromass was observed under hypoxia, consistent with a higher level of Ki-67+ immunostained proliferative cells. Furthermore, several proteins of interest for the study of vNCs phenotype (CD44; caveolin-1; aquaporin 2; patched-1) were successfully detected at the plasma membrane of NP-cells cultured in micromasses under hypoxic condition. IHC was performed on mouse IVD sections as control staining. An innovative 3D culture model of vNCs derived from mouse postnatal NP is proposed, allowing future ex vivo exploration of their basic biology and of the signalling pathways involved in IVD homeostasis that may be relevant for disc repair.
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Affiliation(s)
| | | | | | | | - A Camus
- Nantes Université, Oniris, CHU Nantes, INSERM, Regenerative Medicine and Skeleton, RMeS, UMR 1229, F-4400 Nantes,
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Auboeuf-Dominguez F, Barben J, Blot M, Camus A, Putot A, Manckoundia P. [An unusual cause of a decline in general health in a very old person]. Rev Med Liege 2021; 76:571-574. [PMID: 34357704] [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] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Humans are accidental intermediate hosts and a dead-end for the echinococcosis parasite. No cases of hydatid echinococcosis (hydatid cyst) have ever been described in a French-born very elderly person, who has never been out of France. We report the case of a 90-year-old man hospitalised following a decline in his general health and the discovery of a liver mass on the CT-scan. The abdominal palpation was painless, and no mass was felt. Biological tests revealed hypereosinophilia, a mild inflammatory syndrome, a slight increase in the immunoglobulin E level, and positive serology for Echinococcus granulosus. A diagnosis of hydatid echinococcosis due to Echinococcus granulosus was made given the liver mass on the CT-scan, the positive serology and the hypereosinophilia. Management consisted of watch and wait. This observation is interesting because it was a case of an autochthonous hydatid cyst of an unexpected discovery in a very elderly patient. Indeed, even though the discovery was classical, the clinical presentation was singular because of the context.
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Affiliation(s)
| | - J Barben
- Pôle Personnes Âgées, CHU Dijon, France
| | - M Blot
- Département d'Infectiologie, CHU Dijon, France
| | - A Camus
- Pôle Personnes Âgées, CHU Dijon, France
| | - A Putot
- Pôle Personnes Âgées, CHU Dijon, France
| | - P Manckoundia
- Pôle Personnes Âgées, CHU Dijon, France
- UMR Inserm/U1093 Cognition, Action, Plasticité sensorimotrice, Université de Bourgogne Franche-Comté, Dijon, France
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3
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Camus A, Griffin M, Armwood A, Soto E. A Spontaneous Outbreak of Systemic Edwardsiella piscicida Infection in Largemouth Bass Micropterus salmoides (Lacépède, 1802) in California, USA. J Fish Dis 2019; 42:759-763. [PMID: 30801740 DOI: 10.1111/jfd.12961] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 12/28/2018] [Accepted: 12/31/2018] [Indexed: 06/09/2023]
Affiliation(s)
- Al Camus
- Department of Pathology, College of Veterinary Medicine, University of Georgia Athens, Athens, Georgia
| | - Matt Griffin
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Stoneville, Mississippi
| | - Abigail Armwood
- Department of Pathology, College of Veterinary Medicine, University of Georgia Athens, Athens, Georgia
| | - Esteban Soto
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, California
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Dill J, Sanchez S, McDermott A, Camus A. Disseminated nocardiosis associated with the isolation of Nocardia nova in a longsnout seahorse Hippocampus reidi (Ginsburg). J Fish Dis 2017; 40:1235-1239. [PMID: 28084628 DOI: 10.1111/jfd.12589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 10/21/2016] [Accepted: 10/21/2016] [Indexed: 06/06/2023]
Affiliation(s)
- J Dill
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - S Sanchez
- Athens Veterinary Diagnostic Laboratory, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - A McDermott
- Animal Health Department, Georgia Aquarium, Inc., Atlanta, GA, USA
| | - A Camus
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
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Boylan SM, Camus A, Gaskins J, Oliverio J, Parks M, Davis A, Cassel J. Spondylosis in a green moray eel, Gymnothorax funebris (Ranzani 1839), with swim bladder hyperinflation. J Fish Dis 2017; 40:963-969. [PMID: 27734503 DOI: 10.1111/jfd.12563] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 08/29/2016] [Accepted: 08/30/2016] [Indexed: 06/06/2023]
Affiliation(s)
- S M Boylan
- Husbandry, South Carolina Aquarium, Charleston, SC, USA
| | - A Camus
- Veterinary Pathology, University of Georgia College of Veterinary Medicine, Athens, GA, USA
| | - J Gaskins
- Husbandry, South Carolina Aquarium, Charleston, SC, USA
| | - J Oliverio
- Companion Therapy Laser, Newark, DE, USA
| | - M Parks
- Charleston Veterinary Referral Center, Charleston, SC, USA
| | - A Davis
- Husbandry, South Carolina Aquarium, Charleston, SC, USA
| | - J Cassel
- Husbandry, South Carolina Aquarium, Charleston, SC, USA
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6
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Camus A, Ruivard M, Gaille M. Philosophie de la décision médicale en médecine interne. Rev Med Interne 2017. [DOI: 10.1016/j.revmed.2017.03.082] [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: 10/19/2022]
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Soto E, Richey C, Stevens B, Yun S, Kenelty K, Reichley S, Griffin M, Kurobe T, Camus A. Co-infection of Acipenserid herpesvirus 2 (AciHV-2) and Streptococcus iniae in cultured white sturgeon Acipenser transmontanus. Dis Aquat Organ 2017; 124:11-20. [PMID: 28357982 DOI: 10.3354/dao03108] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [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: 06/06/2023]
Abstract
A mortality event in cultured white sturgeon Acipenser transmontanus (Richardson, 1836) sub-adults was investigated. After transfer between farms, high mortality was observed in fish, associated with back arching, abnormal swimming, and ulcerative skin lesions. Necropsy of moribund individuals revealed hemorrhagic ascites and petechial hemorrhages in the coelomic peritoneum and serosa of internal organs. Acipenserid herpesvirus 2 (AciHV-2) was isolated from external tissue samples, then identified and genotyped by sequencing of the terminase and polymerase genes. In addition, Streptococcus iniae was recovered from internal organs of affected fish. Histologic changes were limited to interstitial hematopoietic areas of the kidney and consisted of small foci of necrosis accompanied by fibrin deposition, minimal inflammatory response, and small numbers of bacterial cocci compatible with streptococci. Identity was confirmed by partial sequencing of the 16S rRNA, rpoB, and gyrB genes. Genetic fingerprinting demonstrated a genetic profile distinct from S. iniae isolates recovered from previous outbreaks in wild and cultured fish in North America, South America, and the Caribbean. Although the isolates were resistant to white sturgeon complement in serum killing assays, in vivo challenges failed to fulfill Koch's postulates. However, the clinical presentation, coupled with consistent recovery of S. iniae and AciHV-2 from moribund fish, suggests viral and bacterial co-infection were the proximate cause of death. To our knowledge, this represents the first report of AciHV-2 and S. iniae co-infection in cultured white sturgeon.
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Affiliation(s)
- Esteban Soto
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, Davis, CA 95616, USA
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Dill J, Brown C, Heym K, Camus A. Lipoid liver disease, atherosclerosis and glomerular lipidosis in a Gulf flounder Paralichthys albigutta (Jordan & Gilbert 1882): a case report. J Fish Dis 2017; 40:273-278. [PMID: 27111715 DOI: 10.1111/jfd.12486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Revised: 03/09/2016] [Accepted: 03/09/2016] [Indexed: 06/05/2023]
Affiliation(s)
- J Dill
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - C Brown
- Athens Veterinary Diagnostic Laboratory, Athens, GA, USA
| | - K Heym
- Florida Aquarium, Tampa, FL, USA
| | - A Camus
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
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9
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Camus A, Dill J, McDermott A, Hatcher N, Griffin M. Edwardsiella piscicida-associated septicaemia in a blotched fantail stingray Taeniura meyeni (Müeller & Henle). J Fish Dis 2016; 39:1125-1131. [PMID: 26850591 DOI: 10.1111/jfd.12435] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Accepted: 10/15/2015] [Indexed: 06/05/2023]
Affiliation(s)
- A Camus
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - J Dill
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - A McDermott
- Animal Health Department, Georgia Aquarium, Inc., Atlanta, GA, USA
| | - N Hatcher
- Animal Health Department, Georgia Aquarium, Inc., Atlanta, GA, USA
| | - M Griffin
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Stoneville, MS, USA
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Camus A, Brown C, Field C, McDermott A. Amyloid-like renal lesions in a roughtail stingray Dasyatis centroura (Mitchill 1815). J Fish Dis 2016; 39:613-617. [PMID: 26111349 DOI: 10.1111/jfd.12397] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 05/13/2015] [Accepted: 05/13/2015] [Indexed: 06/04/2023]
Affiliation(s)
- A Camus
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - C Brown
- Athens Veterinary Diagnostic Laboratory, Athens, GA, USA
| | - C Field
- Animal Health Department, Georgia Aquarium, Inc., Atlanta, GA, USA
| | - A McDermott
- Animal Health Department, Georgia Aquarium, Inc., Atlanta, GA, USA
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12
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Fogelson SB, Yanong RPE, Kane A, Teal CN, Berzins IK, Smith SA, Brown C, Camus A. Gross, histological and ultrastructural morphology of the aglomerular kidney in the lined seahorse Hippocampus erectus. J Fish Biol 2015; 87:805-813. [PMID: 26333141 DOI: 10.1111/jfb.12751] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Accepted: 06/20/2015] [Indexed: 06/05/2023]
Abstract
Histologic evaluation of the renal system in the lined seahorse Hippocampus erectus reveals a cranial kidney with low to moderate cellularity, composed of a central dorsal aorta, endothelial lined capillary sinusoids, haematopoietic tissue, fine fibrovascular stroma, ganglia and no nephrons. In comparison, the caudal kidney is moderately to highly cellular with numerous highly convoluted epithelial lined tubules separated by interlacing haematopoietic tissue, no glomeruli, fine fibrovascular stroma, numerous capillary sinusoids, corpuscles of Stannius and clusters of endocrine cells adjacent to large calibre vessels. Ultrastructural evaluation of the renal tubules reveals minimal variability of the tubule epithelium throughout the length of the nephron and the majority of tubules are characterized by epithelial cells with few apical microvilli, elaborate basal membrane infolding, rare electron dense granules and abundant supporting collagenous matrix.
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Affiliation(s)
- S B Fogelson
- University of Georgia College of Veterinary Medicine, Department of Pathology and Athens Veterinary Diagnostic Laboratory, 501 DW Brooks Drive, Athens, GA 30602, U.S.A
| | - R P E Yanong
- University of Florida School of Forest Resources & Conservation, Program in Fisheries and Aquatic Sciences Tropical Aquaculture Laboratory, 1408 24th St Southeast, Ruskin, FL 33570, U.S.A
| | - A Kane
- University of Florida, Aquatic Pathobiology Laboratory, 1379 Mowry Rd, Gainesville, FL 32608, U.S.A
| | - C N Teal
- University of Florida, Aquatic Pathobiology Laboratory, 1379 Mowry Rd, Gainesville, FL 32608, U.S.A
| | - I K Berzins
- One Water, One Health, LLC, 8214 Golden Valley Rd, Golden Valley, MN 55427, U.S.A
| | - S A Smith
- Department of Biomedical Sciences & Pathobiology, VA-MD Regional College of Veterinary Medicine, Virginia Tech, Duck Pond Drive, Blacksburg, VA 24061, U.S.A
| | - C Brown
- University of Georgia College of Veterinary Medicine, Department of Pathology and Athens Veterinary Diagnostic Laboratory, 501 DW Brooks Drive, Athens, GA 30602, U.S.A
| | - A Camus
- University of Georgia College of Veterinary Medicine, Department of Pathology and Athens Veterinary Diagnostic Laboratory, 501 DW Brooks Drive, Athens, GA 30602, U.S.A
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Boylan SM, Camus A, Waltzek T, Yarbrough L, Miller SR, Howard S. Liquid nitrogen cryotherapy for fibromas in tarpon, Megalops atlanticus, Valenciennes 1847, and neoplasia in lined sea horse, Hippocampus erectus, Perry 1810. J Fish Dis 2015; 38:681-685. [PMID: 25039679 DOI: 10.1111/jfd.12276] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Accepted: 05/16/2014] [Indexed: 06/03/2023]
Affiliation(s)
- S M Boylan
- Department of Husbandry, South Carolina Aquarium, Charleston, SC, USA
| | - A Camus
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - T Waltzek
- Department of Infectious Diseases and Pathology, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA
| | - L Yarbrough
- Mount Pleasant Dermatology, LLC, Mount Pleasant, SC, USA
| | - S R Miller
- Department of Husbandry, South Carolina Aquarium, Charleston, SC, USA
| | - S Howard
- Department of Husbandry, South Carolina Aquarium, Charleston, SC, USA
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Ludwig-Béal S, Camus A, Popitean L, Lévêque L, Manckoundia P. [Diffuse cutaneous lesions]. Rev Med Interne 2015; 36:712-4. [PMID: 25910521 DOI: 10.1016/j.revmed.2015.03.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2015] [Revised: 02/09/2015] [Accepted: 03/13/2015] [Indexed: 10/23/2022]
Affiliation(s)
- S Ludwig-Béal
- Service de médecine interne gériatrie, hôpital de Champmaillot, CHU, BP 87909, 2, rue Jules-Violle, 21079 Dijon cedex, France
| | - A Camus
- Service de médecine interne gériatrie, hôpital de Champmaillot, CHU, BP 87909, 2, rue Jules-Violle, 21079 Dijon cedex, France
| | - L Popitean
- Service de médecine interne gériatrie, hôpital de Champmaillot, CHU, BP 87909, 2, rue Jules-Violle, 21079 Dijon cedex, France
| | - L Lévêque
- Service de médecine interne gériatrie, hôpital de Champmaillot, CHU, BP 87909, 2, rue Jules-Violle, 21079 Dijon cedex, France
| | - P Manckoundia
- Service de médecine interne gériatrie, hôpital de Champmaillot, CHU, BP 87909, 2, rue Jules-Violle, 21079 Dijon cedex, France; Inserm U1093, motricité-plasticité : performance, dysfonctionnement, vieillissement et technologies d'optimisation, université de Bourgogne, BP 27877, 21078 Dijon cedex, France.
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Camus A, Berliner A, Hyatt M, Hatcher N, Clauss T. Exophiala xenobiotica aerocystitis in a Queensland grouper Epinephelus lanceolatus (Bloch). J Fish Dis 2015; 38:221-225. [PMID: 24397705 DOI: 10.1111/jfd.12224] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Revised: 12/02/2013] [Accepted: 12/05/2013] [Indexed: 06/03/2023]
Affiliation(s)
- A Camus
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
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de Cugnac A, Camus A. Recherches phylétiques sur le genreBromus. XII. Un hybride interspécifique nouveau: ×Bromus Laageihyb. nov. =Bromus tectorum×squarrosus. ACTA ACUST UNITED AC 2014. [DOI: 10.1080/00378941.1944.10834358] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Camus A, Berliner A, Clauss T, Hatcher N, Marancik D. Serratia marcescens associated ampullary system infection and septicaemia in a bonnethead shark, Sphyrna tiburo (L.). J Fish Dis 2013; 36:891-895. [PMID: 23534484 DOI: 10.1111/jfd.12107] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Revised: 02/11/2013] [Accepted: 02/15/2013] [Indexed: 06/02/2023]
Affiliation(s)
- A Camus
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
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Camus A, Babinet C. Brachyury, un gène essentiel pour la gastrulation et la formation du mésoderme. Med Sci (Paris) 2013. [DOI: 10.4267/10608/2818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Manckoundia P, Mazen E, Coste A, Somana S, Marilier S, Camus A, Popitean L, Pfitzenmeyer P. Des congés d’hiver mémorables, même après 60 ans. Rev Med Interne 2010. [DOI: 10.1016/j.revmed.2010.10.297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Devilliers H, Grillot I, Mazen E, Camus A, Popitean L, Pfitzenmeyer P. Le phéochromocytome : une cause exceptionnelle d’hypotension orthostatique chez le sujet âgé. Rev Med Interne 2008. [DOI: 10.1016/j.revmed.2008.10.226] [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: 10/21/2022]
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Desport JC, Preux PM, Gouraud M, Mounier M, Souris-seau H, Camus A, Reilhac H. P057 En nutrition entérale, la durée d’utilisation des sondes de gastrostomie n’est liée qu’à la pathologie des patients. NUTR CLIN METAB 2007. [DOI: 10.1016/s0985-0562(07)78859-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Popitean L, Musat A, Zerhouni N, Camus A, Manckoundia P, Astruc K, David M, Pfitzenmeyer P. Chirurgie cardiaque chez le sujet âgé et le sujet très âgé: mortalité, durée et coût d'hospitalisation. Rev Med Interne 2006. [DOI: 10.1016/j.revmed.2006.10.279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Mesbah K, Camus A, Babinet C, Barra J. Mutation in the Trapalpha/Ssr1 gene, encoding translocon-associated protein alpha, results in outflow tract morphogenetic defects. Mol Cell Biol 2006; 26:7760-71. [PMID: 17015483 PMCID: PMC1636874 DOI: 10.1128/mcb.00913-06] [Citation(s) in RCA: 18] [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: 11/20/2022] Open
Abstract
Translocon-associated protein complex (TRAP) is thought to be required for efficient protein-specific translocation across the endoplasmic reticulum membrane. We created a mutation in the Trapalpha gene that leads to the synthesis of a truncated TRAPalpha protein fused to ShBle-beta-galactosidase. Analysis of Trapalpha cDNAs reveals that among three different messenger RNAs expressed in the mouse, one of them encodes a slightly larger protein that differs in its C-terminal end. This mRNA, specific for skeletal muscle and heart, is only expressed after birth. Homozygous Trapalpha mutant pups die at birth, likely as a result of severe cardiac defects. Indeed, the septation of the proximal part of the outflow tract is absent, resulting in a double-outlet right ventricle. Studies of protein secretion in transfected embryonic fibroblasts reveal that the TRAP complex does not function properly in homozygous mutant cells and confirm, in vivo, the involvement of TRAP in substrate-specific translocation. Our results provide the first in vivo demonstration that a member of the TRAP complex plays a crucial role in mammalian heart development and suggest that TRAPalpha could be involved in translocation of factors necessary for maturation of endocardial cushions.
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MESH Headings
- Aging/physiology
- Amino Acid Sequence
- Animals
- Base Sequence
- Calcium-Binding Proteins/chemistry
- Calcium-Binding Proteins/deficiency
- Calcium-Binding Proteins/genetics
- Calcium-Binding Proteins/metabolism
- Cell Movement
- Conserved Sequence
- DNA, Complementary/genetics
- DNA, Complementary/isolation & purification
- Embryo, Mammalian/cytology
- Embryo, Mammalian/embryology
- Embryo, Mammalian/metabolism
- Gene Expression Regulation, Developmental
- Glycoside Hydrolases/genetics
- Glycoside Hydrolases/metabolism
- Heart/embryology
- Homozygote
- Humans
- Membrane Glycoproteins/chemistry
- Membrane Glycoproteins/deficiency
- Membrane Glycoproteins/genetics
- Membrane Glycoproteins/metabolism
- Mice
- Mice, Knockout
- Molecular Sequence Data
- Mutation/genetics
- Myocardium/metabolism
- Neurons/cytology
- Neurons/metabolism
- RNA, Messenger/genetics
- Receptors, Cytoplasmic and Nuclear/chemistry
- Receptors, Cytoplasmic and Nuclear/deficiency
- Receptors, Cytoplasmic and Nuclear/genetics
- Receptors, Cytoplasmic and Nuclear/metabolism
- Receptors, Peptide/chemistry
- Receptors, Peptide/deficiency
- Receptors, Peptide/genetics
- Receptors, Peptide/metabolism
- Recombinant Fusion Proteins/genetics
- Recombinant Fusion Proteins/metabolism
- Sequence Alignment
- Sequence Homology
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Affiliation(s)
- K Mesbah
- Laboratoire EGDM, CNRS URA 2578, Institut Pasteur, 25 rue du Dr Roux, 75724 Paris Cedex 15, France
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Camus A, Clairaz P, Ersham A, Van Kappel AL, Savić G, Staub C. Principe de la vitrification : cinétiques comparatives. ACTA ACUST UNITED AC 2006; 34:737-45. [PMID: 16962814 DOI: 10.1016/j.gyobfe.2006.07.017] [Citation(s) in RCA: 22] [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] [Received: 07/19/2006] [Accepted: 07/25/2006] [Indexed: 11/20/2022]
Abstract
Over the last decade, several methods have been designed to improve the survival rate of vitrificated embryos. Although some teams have succeeded, the main remaining drawback of these methods is that they do not provide a leak proof environment for cryopreserved biological samples. To respond to that demand in respect with the European reglementation, the Cryo Bio System company (CBS) designed the HSV High Security Vitrification Kit (HSV). This system is composed of three distinct parts, a High Security thermal-autogenic sealed clear straw, a capillary with its extremity in form of a gutter, and an introducer that can be mounted on the manipulation rod before introduction into the straw. In this study, we confirmed that the CBS vitrification kit is a suitable method for vitrification in association with a small amount of cryoprotector enriched viscous media such as 25 microM Ficool 400, 750 mM Sucrose, 1% Bovine albumin, 20% Dimethyl Sulfoxide and 20% Ethylene glycol in a Phosphate buffered saline solution. We also evaluated the speed of the temperature decrease during vitrification in comparison with four other commercially available non-aseptic methods and showed the protective role of the CBS system during transfer. These physical data have now been confirmed biologically by P. Vanderzwalmen who obtained easily reproductible good results with human embryo using our method. Today, the HSV represents the unique aseptic alternative device (EC and FDA approved) for embryos, oocytes, and biological samples vitrification.
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Affiliation(s)
- A Camus
- IMV technologies, 10, rue Clemenceau, 61300 L'Aigle, France.
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Popitean L, Manckoundia P, Camus A, Martin-Pfitzenmeyer I, Pfitzenmeyer P. Purpura rhumatoïde du sujet âgé : À propos d'un cas. Rev Med Interne 2006; 27:349-50. [PMID: 16427162 DOI: 10.1016/j.revmed.2005.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/06/2005] [Indexed: 10/25/2022]
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Manckoundia P, Mischis-Troussard C, Ramanantsoa M, Blettery B, François-Pursell I, Martin-Pfitzenmeyer I, Camus A, Popitean L, Lalu-Fraisse A, Pfitzenmeyer P. [The palliative care in geriatrics: a retrospective study of 40 cases]. Rev Med Interne 2005; 26:851-7. [PMID: 16112252 DOI: 10.1016/j.revmed.2005.07.003] [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: 02/24/2005] [Accepted: 07/15/2005] [Indexed: 11/26/2022]
Abstract
INTRODUCTION Owing to the very great age and the polypathology of the patients in geriatrics, we are often confronted to the palliative care decision. PURPOSE The purposes of this retrospective study were both to define the criteria leading to palliative care and to analyse the evolution of patients. METHOD We analysed 40 files of patients hospitalised in Geriatric internal medicine or Geriatric rehabilitation departments over 11 months. RESULTS Mean age was 85.4 years and 62.5% of patients were females. Infections, heart failure, general weakness, orthopaedic affections, strokes and cancers were the main causes of hospitalisation. Patients had 3 medical or surgical histories of chronic or cured serious diseases and a MMSE average value of 17.7. The rate of malnutrition was 92% and 90% of patients were very dependent. Severe infections, cancers, heart failure and severe pressure ulcers were the main affections for decision of palliative care. The latter was always decided by the staff with patients or families taking part in 8 cases and being informed in other cases. The palliative care lasted 7 days on average. Morphine was used in 31 cases. No artificial nutrition was introduced. CONCLUSION The decision of palliative care is very complex since great age, polypathology, great dependence and high prevalence of cognitive disorders are frequent in this population.
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Affiliation(s)
- P Manckoundia
- Service de médecine interne gériatrique, hôpital de Champmaillot, CHU, BP 87909, 2, rue Jules-Violle, 21079 Dijon cedex France.
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Desport JC, Mounier M, Preux PM, Makabakayele K, Camus A, Gayaud JP, Fort M, Dorigny B, Van Dael P. Evaluation of the microbial safety of a new 1.5 l enteral feeding diet reservoir system. Clin Nutr 2004; 23:983-8. [PMID: 15380886 DOI: 10.1016/j.clnu.2003.10.015] [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: 05/14/2003] [Accepted: 10/29/2003] [Indexed: 10/26/2022]
Abstract
BACKGROUND & AIMS Microbial safety is essential during enteral nutrition (EN) as it can be the origin of gastrointestinal symptoms, but can also lead to systemic infections. The use of large-volume diet reservoirs could limit the risk of contamination and reduce nursing time, due to fewer repeated manipulations. The aim of the study was to evaluate in vivo the microbial safety of a new 1.5l enteral feeding diet reservoir system. METHODS After validation of the study settings under standard laboratory conditions, 86 EN lines with sealed fittings were connected to 1.5l diet reservoirs under hospital/patient conditions. Microbial identification and quantification at different sampling times and points were performed. RESULTS AND CONCLUSIONS No microbial contamination was observed in the diet reservoirs and in the nutrition lines above the drip chamber, demonstrating the microbial safety of this system. Retrograde contamination of the distal nutrition line end at completion of EN was observed and may be affected by the cumulative time of use of the tube. The contaminating microbial species were essentially bacteria of normal oral and digestive flora.
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Affiliation(s)
- J C Desport
- Unité de Nutrition, Service d'Hépato-Gastroentérologie, Hôpital Universitaire Dupuytren, 87042 Limoges Cedex, France.
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Manckoundia P, Popitean L, Lévêque L, Arveux I, Camus A, Besancenot J, Pfitzenmeyer P. Maladie de Horton associée à une élévation d'ANCAchez une patiente âgée. Rev Med Interne 2003. [DOI: 10.1016/s0248-8663(03)80217-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Fernandez EO, Fernandez C, Fabres C, Camus A, Arriagada P. Surgical treatment and follow-up of women with intermenstrual bleeding due to cesarean section scar defect. ACTA ACUST UNITED AC 2002. [DOI: 10.1016/s1074-3804(02)80055-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Fernández E, Fernández C, Silva R, Camus A, Fernández S, Fabres C. Results and complications after surgical treatment of deep infiltrative endometriosis. Fertil Steril 2002. [DOI: 10.1016/s0015-0282(01)03140-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Camus A, Mesbah K, Rallu M, Babinet C, Barra J. Gene trap insertion reveals two open reading frames in the mouse SSeCKS gene: the form predominantly detected in the nervous system is suppressed by the insertion while the other, specific of the testis, remains expressed. Mech Dev 2001; 105:79-91. [PMID: 11429284 DOI: 10.1016/s0925-4773(01)00384-7] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Scaffold proteins play an important role in regulating signal transduction by targeting kinases and phosphatases in close proximity to their relevant substrates. SSeCKS protein has been described as a protein kinase C and A (PKC/PKA) anchoring protein as well as a PKC substrate with a tumor suppressor activity. In this study, we report the generation, via gene trapping in embryonic stem cells of mice carrying an insertion in the mouse SSeCKS gene. Through the molecular analysis of the insertion site, we show that SSeCKS contains two alternative promoters directing the synthesis of mRNAs (P1- and P2-mRNA), encoding two different proteins, one of which would be a truncated form of the other. Interestingly, these RNAs are differentially expressed, P2 being found exclusively in the male germ line, while P1 exhibits a dynamic and wider pattern of expression during embryonic development and in the adult; its expression is predominant in the nervous system. Finally, we show that P1- but not P2-mRNA expression is abolished by the insertion and furthermore that mice homozygous for the mutation lack SSeCKS in all tissues except the male germ cells. Nevertheless and surprisingly, these mice do not exhibit any obvious phenotype. The functional implications of these observations are discussed.
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Affiliation(s)
- A Camus
- Unité de Biologie du Développement, URA-CNRS 1960, Institut Pasteur, 25 rue du Dr Roux, 75724 Cedex 15, Paris, France
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Camus A, Davidson BP, Billiards S, Khoo P, Rivera-Pérez JA, Wakamiya M, Behringer RR, Tam PP. The morphogenetic role of midline mesendoderm and ectoderm in the development of the forebrain and the midbrain of the mouse embryo. Development 2000; 127:1799-813. [PMID: 10751169 DOI: 10.1242/dev.127.9.1799] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The anterior midline tissue (AML) of the late gastrula mouse embryo comprises the axial mesendoderm and the ventral neuroectoderm of the prospective forebrain, midbrain and rostral hindbrain. In this study, we have investigated the morphogenetic role of defined segments of the AML by testing their inductive and patterning activity and by assessing the impact of their ablation on the patterning of the neural tube at the early-somite-stage. Both rostral and caudal segments of the AML were found to induce neural gene activity in the host tissue; however, the de novo gene activity did not show any regional characteristic that might be correlated with the segmental origin of the AML. Removal of the rostral AML that contains the prechordal plate resulted in a truncation of the head accompanied by the loss of several forebrain markers. However, the remaining tissues reconstituted Gsc and Shh activity and expressed the ventral forebrain marker Nkx2.1. Furthermore, analysis of Gsc-deficient embryos reveals that the morphogenetic function of the rostral AML requires Gsc activity. Removal of the caudal AML led to a complete loss of midline molecular markers anterior to the 4th somite. In addition, Nkx2.1 expression was not detected in the ventral neural tube. The maintenance and function of the rostral AML therefore require inductive signals emanating from the caudal AML. Our results point to a role for AML in the refinement of the anteroposterior patterning and morphogenesis of the brain.
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Affiliation(s)
- A Camus
- Embryology Unit, Children's Medical Research Institute, Locked Bag 23, Wentworthville, NSW 2145, Australia.
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Mourey F, Camus A, Pfitzenmeyer P. [Posture and aging. Current fundamental studies and management concepts]. Presse Med 2000; 29:340-4. [PMID: 10719455] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/15/2023] Open
Abstract
FUNDAMENTAL IMPORTANCE OF POSTURE: In the elderly subject, preservation of posture is fundamental to maintaining functional independence. In recent years, there has been much progress in our understanding of the mechanisms underlying strategies used to control equilibrium in the upright position. Physiological aging, associated with diverse disease states, dangerously alters the postural function, particularly anticipated adjustments which allow an adaptation of posture to movement. CLINICAL ASSESSMENT OF POSTURE: Several tests have been developed to assess posture in the elderly subject, particularly the time it takes to start walking. We selected certain tests which can be used in everyday practice to predict falls: the stance test, the improved Romberg test, the "timed get up and go test", measurement of walking cadence, assessment of balance reactions, sitting-standing and standing-sitting movements and capacity to get up off the floor. PATIENT CARE: Elderly patients with equilibrium disorders can benefit from specific personalized rehabilitation protocols. Different techniques have been developed for multiple afferential stimulation, reprogramming postural strategies, and correcting for deficient motor automatisms.
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Affiliation(s)
- F Mourey
- Service de Médecine gériatrique, CHRU de Dijon. france.mourey@planet
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Tam PP, Goldman D, Camus A, Schoenwolf GC. Early events of somitogenesis in higher vertebrates: allocation of precursor cells during gastrulation and the organization of a meristic pattern in the paraxial mesoderm. Curr Top Dev Biol 1999; 47:1-32. [PMID: 10595300 DOI: 10.1016/s0070-2153(08)60720-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- P P Tam
- Embryology Unit, University of Sydney, Westmead, NSW, Australia
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Manckoundia P, Troussard-Mischis C, Piroth C, Camus A, Lalu-Fraisse A, Pfitzenmeyer P, Lorcerie B. Hématomes musculaires sous héparine de bas poids moléculaire chez le sujet très âgé. Rev Med Interne 1999. [DOI: 10.1016/s0248-8663(99)80431-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Affiliation(s)
- A Camus
- Embryology Unit, Children's Medical Research Institute, Wentworthville, New South Wales, Australia
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Abstract
The mammalian SWI-SNF complex is an evolutionarily conserved, multi-subunit machine, involved in chromatin remodelling during transcriptional activation. Within this complex, the BRM (SNF2alpha) and BRG1 (SNF2beta) proteins are mutually exclusive subunits that are believed to affect nucleosomal structures using the energy of ATP hydrolysis. In order to characterize possible differences in the function of BRM and BRG1, and to gain further insights into the role of BRM-containing SWI-SNF complexes, the mouse BRM gene was inactivated by homologous recombination. BRM-/- mice develop normally, suggesting that an observed up-regulation of the BRG1 protein can functionally replace BRM in the SWI-SNF complexes of mutant cells. Nonetheless, adult mutant mice were approximately 15% heavier than control littermates. This may be caused by increased cell proliferation, as demonstrated by a higher mitotic index detected in mutant livers. This is supported further by the observation that mutant embryonic fibroblasts were significantly deficient in their ability to arrest in the G0/G1 phase of the cell cycle in response to cell confluency or DNA damage. These studies suggest that BRM participates in the regulation of cell proliferation in adult mice.
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Affiliation(s)
- J C Reyes
- Unité de Biologie du Développement, URA 1960 du CNRS, Institut Pasteur, Paris, France
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Bousseau S, Brillard JP, Marguant-Le Guienne B, Guérin B, Camus A, Lechat M. Comparison of bacteriological qualities of various egg yolk sources and the in vitro and in vivo fertilizing potential of bovine semen frozen in egg yolk or lecithin based diluents. Theriogenology 1998; 50:699-706. [PMID: 10734444 DOI: 10.1016/s0093-691x(98)00175-7] [Citation(s) in RCA: 107] [Impact Index Per Article: 4.1] [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: 10/17/2022]
Abstract
The addition of components of animal origin (egg yolk, milk) to most commercial diluents used to freeze bull semen represents a potential risk of contamination of the doses with bacteria or mycoplasma. A series of quantitative and qualitative analyses were performed to detect microbiological contamination observed in Biociphos plus (a new lecithin-glycerol based freezing salt buffer), in an egg yolk diluent (Triladyl) or in an egg yolk + milk-based (Laiciphos) diluent of bull semen. The 2 diluents containing animal products showed moderate (10 to 60 CFU/mL) contamination (17/17 samples) with bacteria or mycoplasma, or both, while no contamination was observed in the 6 examined batches of Biociphos plus. Biociphos plus was also compared with another commercial diluent (Laiciphos) for use in freezing bull semen intended for in vitro and/or in vivo fertilization. No difference (P > 0.05) could be detected between the 2 diluents for in vitro fertility rates (percentage of cleaved zygotes: 85.7% and 88.0%, respectively, for Laiciphos and Biociphos plus). Similarly, 2 series of comparisons conducted in dairy cows artificially inseminated with semen frozen in either Biociphos plus or Laiciphos showed no difference in fertilizing capacity (tested at 60 to 90 d; P > 0.05) irrespective of the age of the bulls (Trial 1, bulls aged 14 to 15 m.o.; Trial 2, bulls aged 2 to 5 yr, field trials). It is concluded that, in addition to maintaining the fertilizing capacity of bull semen at levels comparable to those observed with standard freezing diluent, Biociphos plus also prevents microbiological contamination by bacteria or mycoplasma, both of which are generally present in the various commercially available sources of egg yolk.
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Pfitzenmeyer P, Lauwerier C, Camus A. [Reversible bronchial spasm syndrome in the very old]. Presse Med 1998; 27:878-83. [PMID: 9767879] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/09/2023] Open
Abstract
UNLABELLED HIGH PREVALENCE: Several epidemiological studies have shown that the prevalence of bronchial asthma is high in the elderly. It is often difficult to establish the diagnosis of asthma in this population because of the scarcity of symptoms. Pulmonary function tests are widely used to confirm the diagnosis. These tests are possible in most elderly people excepting cases of severe dementia. MECHANISMS Pathophysiology of asthma in the elderly may be characterized by superimposition of different factors: 1) the effect of age which is associated with airway adrenoreceptor dysfunction; 2) the impact of chronic pulmonary diseases which may increase airways inflammation; 3) the role of triggers such as infections or various medications. MANAGEMENT Management of asthma consists in a specific treatment of trigger(s) associated with anti-inflammatory and bronchodilator medications. Elderly subjects may have difficulty using offinhalators and spacer devices are widely used.
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Camus A, Barra J, Babinet C. A la recherche de gènes impliqués dans le développement embryonnaire de la souris : le "piégeage" de gènes. Med Sci (Paris) 1998. [DOI: 10.4267/10608/933] [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: 11/30/2022] Open
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Asaro F, Camus A, Gobetto R, Olivieri AC, Pellizer G. 63Cu-31P coupling constants and 63Cu quadrupole couplings from 31P CP/MAS spectra of copper (I)--phosphine complexes with aryldithiocarboxylates or benzoate. Solid State Nucl Magn Reson 1997; 8:81-88. [PMID: 9203282 DOI: 10.1016/s0926-2040(96)01289-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Magic-angle spinning 31P NMR spectra of solid [CuS2C-Ph(PPh3)2] 1, [{CuS2C-pT}4(PPh3)2] 2, [{CuS2C-Ph}4(PPh3)2] 3. [CuS2C-Ph(dppm)]2 4 and [CuO2C-Ph(dppm)]2 5, (T = tolyl, dppm = bis(diphenylphosphino)methane) were obtained at 109.6 MH2. They consist of distorted quartets from non-equivalent phosphorus atoms and provide approximate values of the indirect spin-spin coupling constant J[63Cu,31P], that are indicative of the covalency of the dithiocarboxylate-copper bonding. The spacing distortions are related to a number of molecular and structural parameters and thereby allow an estimation of the copper quadrupole coupling constant e2qQ/h which, as expected, is smaller for tetra-coordinated (1, 2, 3 and 4) than for tri-coordinated (5) copper sites. The spectrum of 2 has been successfully simulated (including the isotope effects from the less abundant 65Cu isotope) using the full theory for calculation of the spin eigenfunctions of the quadrupolar nucleus.
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Affiliation(s)
- F Asaro
- Dipartimento di Scienze Chimiche, Università di Trieste, Italy
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Ormandy CJ, Camus A, Barra J, Damotte D, Lucas B, Buteau H, Edery M, Brousse N, Babinet C, Binart N, Kelly PA. Null mutation of the prolactin receptor gene produces multiple reproductive defects in the mouse. Genes Dev 1997; 11:167-78. [PMID: 9009200 DOI: 10.1101/gad.11.2.167] [Citation(s) in RCA: 522] [Impact Index Per Article: 19.3] [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: 02/03/2023]
Abstract
Mice carrying a germ-line null mutation of the prolactin receptor gene have been produced by gene targeting in embryonic stem cells. Heterozygous females showed almost complete failure of lactation attributable to greatly reduced mammary gland development after their first, but not subsequent, pregnancies. Homozygous females were sterile owing to a complete failure of embryonic implantation. Moreover, they presented multiple reproductive abnormalities, including irregular cycles, reduced fertilization rates, defective preimplantation embryonic development, and lack of pseudopregnancy. Half of the homozygous males were infertile or showed reduced fertility. This work establishes the prolactin receptor as a key regulator of mammalian reproduction, and provides the first total ablation model to further study the role of the prolactin receptor and its ligands.
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Affiliation(s)
- C J Ormandy
- Institut National de la Santé et de la Recherche Médicale (INSERM) Unité 344, Endocrinologie Moléculaire Faculté de Médecine Necker, Paris, France
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Weinbach J, Camus A, Barra J, Dumont P, Julian M, Cros S, Babinet C, Tiraby G. Transgenic mice expressing the Sh ble bleomycin resistance gene are protected against bleomycin-induced pulmonary fibrosis. Cancer Res 1996; 56:5659-65. [PMID: 8971172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Despite the high efficiency of bleomycin (BLM) as a chemotherapeutic agent against various carcinomas, the potentially lethal and chronic fibrotic response of the lung is a major dose-limiting side effect. Here, we explore the possibility of a direct inhibition of lung tissue injury by in vivo expression of the actinomycetes BLM resistance protein Sh ble. Transgenic mice expressing the Sh ble gene under the control of a composite viral promoter were produced after introduction of the transgene into D3 ES cells. The protein was detected at high level in lungs, spleen, and kidney. We then assessed its ability to modulate the BLM-induced fibrotic response in the transgenic mice in comparison with C57BL/6 and 129/Sv parental mice. Cumulative doses of 300, 400, or 500 mg/kg BLM were administered either by i.p. or s.c. repeated injections in the different strains. Transgenic mice were shown to be clearly less sensitive to BLM toxicity, as assessed by lung histology. The pulmonary hydroxyproline content in the treated transgenic mice was close to its baseline level, whereas it was up to 50% higher than the control level in C57BL/6 and 129/Sv parental mice. These observations are consistent with the hypothesis that a resistance gene specifically expressed in lungs may prevent the BLM-induced inflammation.
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Affiliation(s)
- J Weinbach
- Laboratoire de Génétique et Microbiologie, Université Paul Sabatier,Toulouse, France
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Abstract
A new gene trap vector has been designed, comprised of a fusion between the Sh ble gene, which confers resistance to the antibiotic phleomycin, and the lacZ gene (phleal fusion gene). A synthetic splice acceptor, made of the yeast branchpoint followed by a pyrimidin-rich sequence of 27 nucleotides, is included at the 5' extremity. The linearized gene trap vector was introduced into mouse embryonic stem cells (ES cells), and 40 phleomycin resistant (phleo') cell lines possessing a single copy of the insert were selected. They were stable in expressing the lacZ gene. Reporter gene expression was studied at days 8.5 and 10.5 of embryonic development in chimeric embryos obtained after injection of phleo' ES clones into 8-cell stage embryos. Out of 20 phleal lines examined, 14 exhibited beta-galactosidase expression at day 10.5. Use of the phleal fusion gene trap vector to select genes expressed in ES cells, therefore, is compatible with the isolation of genes expressed at midgestation. However, and most intriguingly, 10 out of these 14 cell lines (71%) displayed reporter gene expression mostly in heart and liver. Two of them exhibited, in addition, expression in central nervous system (CNS) or in CNS and limb buds, respectively. Germline chimeras were subsequently obtained and 15 mouse lines have been established. Intercrosses of animals heterozygous for the insertion revealed a mutant phenotype in several lines.
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Affiliation(s)
- A Camus
- Département d'Immunologie, URA CNRS 1960, Institut Pasteur, Paris, France
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Bories JC, Willerford DM, Grévin D, Davidson L, Camus A, Martin P, Stéhelin D, Alt FW. Increased T-cell apoptosis and terminal B-cell differentiation induced by inactivation of the Ets-1 proto-oncogene. Nature 1995; 377:635-8. [PMID: 7566176 DOI: 10.1038/377635a0] [Citation(s) in RCA: 253] [Impact Index Per Article: 8.7] [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: 01/26/2023]
Abstract
The Ets-1 proto-oncogene is a member of a transcription factor family characterized by homology to the v-ets oncogene. In adult mice, Ets-1 is expressed predominantly in lymphoid cells where it has been implicated in regulating transcription of lymphocyte-specific genes. Following T-cell activation, the specific DNA binding activity of Ets-1 is inactivated by transient phosphorylation, suggesting a function in the transition from the resting to activated state. Ets-1 has also been suggested to cooperate with the AP-1 transcription factor complex to mediate cellular growth factor responses. Here we show, by using RAG-2-deficient blastocyst complementation, that Ets-1 deficiency has dramatic, but different, effects on development and function of T- and B-lineage cells. Ets-1-deficient T cells were present in reduced numbers and were highly susceptible to cell death in vitro. In contrast, Ets-1-deficient B cells were present in normal numbers but a large proportion were IgM plasma cells. Our data demonstrate that Ets-1 is essential for maintenance of the normal pool of resting T- and B-lineage cells.
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Affiliation(s)
- J C Bories
- Howard Hughes Medical Institute, Children's Hospital, Boston, Massachusetts 02115, USA
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Pucheu-Haston CM, Camus A, Taboada J, Gaunt SD, Snider TG, Lopez MK. Megakaryoblastic leukemia in a dog. J Am Vet Med Assoc 1995; 207:194-6. [PMID: 7601714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A 7-year-old spayed Louisiana Catahoula Leopard dog was examined to determine the cause of shifting forelimb lameness, anorexia, and lethargy. The dog was pyrectic and had splenomegaly, thrombocytopenia, and nonregenerative anemia. Examination of a bone marrow aspirate revealed hypocellularity with normal maturation of erythroid and granulocytic cell lines; however, approximately half of the cells were large undifferentiated blast cells. These cells were identified as megakaryoblasts, using immunohistochemical techniques to detect reactivity for Factor VIII-related antigen and platelet glycoprotein IIIa. Necropsy revealed diffuse neoplastic involvement of the spleen, liver, lungs, bone marrow, and lymph nodes. Cellular infiltrate was characterized by a mixture of megakaryoblasts and typical megakaryocytes. Megakaryoblastic leukemia (M7) is the designation proposed by the Animal Leukemia Study Group for myeloproliferative neoplasms of megakaryocytic lineage.
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Affiliation(s)
- C M Pucheu-Haston
- Department of Veterinary Clinical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge 70803-8410, USA
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Abstract
Changes in temperature (from room temperature to 50 degrees C) and staining time (from 90 to 10 min) were evaluated as a means of improving the detection of microsporidia from stool specimens. A blinded and independent comparison of 50 known positive matched-specimen pairs by three technologists resulted in consistently easier microscopic detection. The background is clearer, and spores stain more intensely. Staining time is reduced by 80 min.
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Affiliation(s)
- E Kokoskin
- McGill University Centre for Tropical Diseases, Montreal General Hospital, Canada
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