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Coutzac C, Chapuis J, Poullenot F, Chabrun E, Capdepont M, Blanco P, Laharie D. Association Between Infliximab Trough Levels and the Occurrence of Paradoxical Manifestations in Patients with Inflammatory Bowel Disease: a Case-Control Study. J Crohns Colitis 2015; 9:982-7. [PMID: 26351388 DOI: 10.1093/ecco-jcc/jjv159] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 08/17/2015] [Indexed: 12/20/2022]
Abstract
BACKGROUND AND AIM Anti-tumour necrosis factor [TNF] agents have dramatically improved the prognosis of inflammatory bowel disease [IBD]. However, despite their good safety profile, use of these agents may lead to paradoxical manifestations involving skin or joints. Pathogenesis of such side effects is poorly understood and may involve anti-TNF pharmacokinetics. The aim of the present study was to look for an association between infliximab trough levels [ITL] and cutaneous [CPM] or rheumatological [RPM] paradoxical manifestations. METHODS IBD patients receiving infliximab as maintenance therapy were included in a cross-sectional prospective monocentre study. At inclusion, patients had an ITL measurement [LISA-TRACKER®, Biomedical Diagnostics BMD] and were assessed for paradoxical manifestations: a CPM was defined by new onset or exacerbation of pre-existing psoriasis lesions during IFX therapy, and an RPM by new onset of severe poly-arthralgia during IFX therapy. RESULTS Among the 121 patients included [69 female; median age: 38.9 years; 92 with Crohn's disease], 7% had CPM and 8% RPM. Median ITL values were 5.87 [range: 0.52-19.53] µg/ml in patients with CPM and 1.90 [0.00-13.5] µg/ml in those with RPM, as compared respectively with 5.12 [0.00-49.12] µg/ml in patients without CPM [p = 0.56] and 5.57 [0.00-49.12] µg/ml in those without RPM [p = 0.058]. No prognostic factor was associated with CPM. The single factor associated with RPM was elevated antinuclear antibodies. CONCLUSION ITL were not elevated in IBD patients developing cutaneous or rheumatological paradoxical manifestations when receiving IFX as maintenance therapy. As suggested by the high level of antinuclear antibodies, RPM could be related to an induced autoimmune disorder.
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Affiliation(s)
- C Coutzac
- Service d'Hépato-gastroentérologie, CHU de Bordeaux, Hôpital Haut-Lévêque, Pessac, France
| | - J Chapuis
- Service d'Hépato-gastroentérologie, CHU de Bordeaux, Hôpital Haut-Lévêque, Pessac, France
| | - F Poullenot
- Service d'Hépato-gastroentérologie, CHU de Bordeaux, Hôpital Haut-Lévêque, Pessac, France
| | - E Chabrun
- Service d'Hépato-gastroentérologie, CHU de Bordeaux, Hôpital Haut-Lévêque, Pessac, France
| | - M Capdepont
- Service d'Hépato-gastroentérologie, CHU de Bordeaux, Hôpital Haut-Lévêque, Pessac, France
| | - P Blanco
- Laboratoire d'immunologie, CHU de Bordeaux, Hôpital Pellegrin, Bordeaux, France
| | - D Laharie
- Service d'Hépato-gastroentérologie, CHU de Bordeaux, Hôpital Haut-Lévêque, Pessac, France
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Chouraki V, De Bruijn RFAG, Chapuis J, Bis JC, Reitz C, Schraen S, Ibrahim-Verbaas CA, Grenier-Boley B, Delay C, Rogers R, Demiautte F, Mounier A, Fitzpatrick AL, Berr C, Dartigues JF, Uitterlinden AG, Hofman A, Breteler M, Becker JT, Lathrop M, Schupf N, Alpérovitch A, Mayeux R, van Duijn CM, Buée L, Amouyel P, Lopez OL, Ikram MA, Tzourio C, Lambert JC. A genome-wide association meta-analysis of plasma Aβ peptides concentrations in the elderly. Mol Psychiatry 2014; 19:1326-35. [PMID: 24535457 PMCID: PMC4418478 DOI: 10.1038/mp.2013.185] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Revised: 10/08/2013] [Accepted: 10/31/2013] [Indexed: 11/09/2022]
Abstract
Amyloid beta (Aβ) peptides are the major components of senile plaques, one of the main pathological hallmarks of Alzheimer disease (AD). However, Aβ peptides' functions are not fully understood and seem to be highly pleiotropic. We hypothesized that plasma Aβ peptides concentrations could be a suitable endophenotype for a genome-wide association study (GWAS) designed to (i) identify novel genetic factors involved in amyloid precursor protein metabolism and (ii) highlight relevant Aβ-related physiological and pathophysiological processes. Hence, we performed a genome-wide association meta-analysis of four studies totaling 3 528 healthy individuals of European descent and for whom plasma Aβ1-40 and Aβ1-42 peptides levels had been quantified. Although we did not observe any genome-wide significant locus, we identified 18 suggestive loci (P<1 × 10(-)(5)). Enrichment-pathway analyses revealed canonical pathways mainly involved in neuronal functions, for example, axonal guidance signaling. We also assessed the biological impact of the gene most strongly associated with plasma Aβ1-42 levels (cortexin 3, CTXN3) on APP metabolism in vitro and found that the gene protein was able to modulate Aβ1-42 secretion. In conclusion, our study results suggest that plasma Aβ peptides levels are valid endophenotypes in GWASs and can be used to characterize the metabolism and functions of APP and its metabolites.
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Affiliation(s)
- V Chouraki
- INSERM U744, Lille, France,Institut pasteur de Lille, Lille, France,Université Lille-Nord de France, Lille, France
| | - RFAG De Bruijn
- Department of Epidemiology, Erasmus MC University Medical Center,
Rotterdam, The Netherlands,Department of Neurology, Erasmus MC University Medical Center,
Rotterdam, The Netherlands,Netherlands Consortium for Healthy Aging, Leiden, The
Netherlands
| | - J Chapuis
- INSERM U744, Lille, France,Institut pasteur de Lille, Lille, France,Université Lille-Nord de France, Lille, France
| | - JC Bis
- Cardiovascular Health Resarch Unit and Department of Medicine,
University of Washington, Seattle, WA, USA
| | - C Reitz
- The Taub Institute for Research on Alzheimer’s Disease and
the Aging Brain, Columbia University, New York, NY, USA,The Gertrude H. Sergievsky Center, Columbia University, New York,
NY, USA,The Department of Neurology, College of Physicians and Surgeons,
Columbia University, New York, NY, USA
| | - S Schraen
- Université Lille-Nord de France, Lille, France,Inserm U837, Jean-Pierre Aubert Research Centre, Lille,
France,Centre Hospitalier Régional Universitaire de Lille, Lille,
France
| | - CA Ibrahim-Verbaas
- Department of Epidemiology, Erasmus MC University Medical Center,
Rotterdam, The Netherlands,Department of Neurology, Erasmus MC University Medical Center,
Rotterdam, The Netherlands
| | - B Grenier-Boley
- INSERM U744, Lille, France,Institut pasteur de Lille, Lille, France,Université Lille-Nord de France, Lille, France
| | - C Delay
- INSERM U744, Lille, France,Institut pasteur de Lille, Lille, France,Université Lille-Nord de France, Lille, France
| | - R Rogers
- The Taub Institute for Research on Alzheimer’s Disease and
the Aging Brain, Columbia University, New York, NY, USA
| | - F Demiautte
- INSERM U744, Lille, France,Institut pasteur de Lille, Lille, France,Université Lille-Nord de France, Lille, France
| | - A Mounier
- INSERM U744, Lille, France,Institut pasteur de Lille, Lille, France,Université Lille-Nord de France, Lille, France
| | - AL Fitzpatrick
- Cardiovascular Health Resarch Unit and Department of Medicine,
University of Washington, Seattle, WA, USA
| | | | - C Berr
- INSERM U888, Hôpital La Colombière, Montpellier,
France
| | - J-F Dartigues
- INSERM U593, Victor Segalen University, Bordeaux, France
| | - AG Uitterlinden
- Netherlands Consortium for Healthy Aging, Leiden, The
Netherlands,Department of Internal medicine, Leiden, Erasmus MC University
Medical Center, Rotterdam, The Netherlands
| | - A Hofman
- Department of Epidemiology, Erasmus MC University Medical Center,
Rotterdam, The Netherlands,Netherlands Consortium for Healthy Aging, Leiden, The
Netherlands
| | - M Breteler
- Department of Epidemiology, Erasmus MC University Medical Center,
Rotterdam, The Netherlands,DZNE, German Center for Neurodegenerative Diseases, Bonn,
Germany
| | - JT Becker
- Alzheimer’s Disease Research Center, Departments of
Neurology, Psychiatry and Psychology, University of Pittsburgh School of Medicine,
Pittsburgh, PA, USA
| | - M Lathrop
- Fondation Jean Dausset—Centre d’Etude du
Polymorphisme Humain, Paris, France,Centre National de Genotypage, Institut Genomique, Commissariat
à l’énergie Atomique, Evry, France
| | - N Schupf
- The Gertrude H. Sergievsky Center, Columbia University, New York,
NY, USA
| | | | - R Mayeux
- The Taub Institute for Research on Alzheimer’s Disease and
the Aging Brain, Columbia University, New York, NY, USA,The Department of Psychiatry, College of Physicians and Surgeons,
Columbia University, New York, NY, USA
| | - CM van Duijn
- Department of Epidemiology, Erasmus MC University Medical Center,
Rotterdam, The Netherlands,Netherlands Consortium for Healthy Aging, Leiden, The
Netherlands
| | - L Buée
- Université Lille-Nord de France, Lille, France,Inserm U837, Jean-Pierre Aubert Research Centre, Lille,
France,Centre Hospitalier Régional Universitaire de Lille, Lille,
France
| | - P Amouyel
- INSERM U744, Lille, France,Institut pasteur de Lille, Lille, France,Université Lille-Nord de France, Lille, France,Centre Hospitalier Régional Universitaire de Lille, Lille,
France
| | - OL Lopez
- Alzheimer’s Disease Research Center, Departments of
Neurology, Psychiatry and Psychology, University of Pittsburgh School of Medicine,
Pittsburgh, PA, USA
| | - MA Ikram
- Department of Epidemiology, Erasmus MC University Medical Center,
Rotterdam, The Netherlands,Department of Neurology, Erasmus MC University Medical Center,
Rotterdam, The Netherlands,Netherlands Consortium for Healthy Aging, Leiden, The
Netherlands,Department of Radiology, Erasmus MC University Medical Center,
Rotterdam, The Netherlands
| | - C Tzourio
- INSERM U593, Victor Segalen University, Bordeaux, France,INSERM U708, Paris, France
| | - J-C Lambert
- INSERM U744, Lille, France,Institut pasteur de Lille, Lille, France,Université Lille-Nord de France, Lille, France
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Chapuis J, Cohen Y, He X, Zhang Z, Jin S, Xu F, Wilson DA. Lateral entorhinal modulation of piriform cortical activity and fine odor discrimination. J Neurosci 2013; 33:13449-59. [PMID: 23946403 PMCID: PMC3742931 DOI: 10.1523/jneurosci.1387-13.2013] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Revised: 07/09/2013] [Accepted: 07/15/2013] [Indexed: 11/21/2022] Open
Abstract
The lateral entorhinal cortex (LEC) receives direct input from olfactory bulb mitral cells and piriform cortical pyramidal cells and is the gateway for olfactory input to the hippocampus. However, the LEC also projects back to the piriform cortex and olfactory bulb. Activity in the LEC is shaped by input from the perirhinal cortices, hippocampus, and amygdala, and thus could provide a rich contextual modulation of cortical odor processing. The present study further explored LEC feedback to anterior piriform cortex by examining how LEC top-down input modulates anterior piriform cortex odor evoked activity in rats. Retrograde viral tracing confirmed rich LEC projections to both the olfactory bulb and piriform cortices. In anesthetized rats, reversible lesions of the ipsilateral LEC increased anterior piriform cortical single-unit spontaneous activity. In awake animals performing an odor discrimination task, unilateral LEC reversible lesions enhanced ipsilateral piriform cortical local field potential oscillations during odor sampling, with minimal impact on contralateral activity. Bilateral LEC reversible lesions impaired discrimination performance on a well learned, difficult odor discrimination task, but had no impact on a well learned simple odor discrimination task. The simple discrimination task was impaired by bilateral reversible lesions of the anterior piriform cortex. Given the known function of LEC in working memory and multisensory integration, these results suggest it may serve as a powerful top-down modulator of olfactory cortical function and odor perception. Furthermore, the results provide potential insight into how neuropathology in the entorhinal cortex could contribute to early olfactory deficits seen in Alzheimer's disease.
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Affiliation(s)
- Julie Chapuis
- Emotional Brain Institute, Nathan Kline Institute for Psychiatric Research, Orangeburg, New York 10962
- Child and Adolescent Psychiatry, New York University Langone School of Medicine, New York, New York 10016
| | - Yaniv Cohen
- Emotional Brain Institute, Nathan Kline Institute for Psychiatric Research, Orangeburg, New York 10962
- Child and Adolescent Psychiatry, New York University Langone School of Medicine, New York, New York 10016
| | - Xiaobin He
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, the Chinese Academy of Sciences, Wuhan 430071, China
- University of Chinese Academy of Sciences, Beijing, 100049, China, and
| | - Zhijan Zhang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, the Chinese Academy of Sciences, Wuhan 430071, China
- Wuhan National Laboratory for Optoelectronics, Wuhan 430074, China
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Sen Jin
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, the Chinese Academy of Sciences, Wuhan 430071, China
| | - Fuqiang Xu
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, the Chinese Academy of Sciences, Wuhan 430071, China
- Wuhan National Laboratory for Optoelectronics, Wuhan 430074, China
- University of Chinese Academy of Sciences, Beijing, 100049, China, and
| | - Donald A. Wilson
- Emotional Brain Institute, Nathan Kline Institute for Psychiatric Research, Orangeburg, New York 10962
- Child and Adolescent Psychiatry, New York University Langone School of Medicine, New York, New York 10016
- Wuhan National Laboratory for Optoelectronics, Wuhan 430074, China
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Abstract
Pattern separation plays an important role in perception and memory. In olfaction, pattern separation is critical component of piriform cortical odor processing contributing to behavioral perception of overlapping odor mixtures. Previous work has demonstrated that odor discrimination ability is modulated by acetylcholine. Here, we extended this previous work by using a distinct, well characterized complex odor stimulus set that has been shown to differentially involve pattern separation processes within piriform cortex. We find that the cholinergic muscarinic receptor agonist oxotremorine facilitates the acquisition of odor discrimination. Furthermore, the muscarinic receptor antagonist scopolamine impairs acquisition of odor discrimination even if the antagonist is limited to the piriform cortex. Finally, acetylcholine effects are most robust during discrimination acquisition, with minimal effects during expression.
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Affiliation(s)
- Julie Chapuis
- Child & Adolescent Psychiatry, New York University Langone School of Medicine, USA
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5
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Abdelhaye YOM, Chaouche M, Chapuis J, Charlaix E, Hinch J, Roux S, Van Damme H. Tackiness and cohesive failure of granular pastes: mechanistic aspects. Eur Phys J E Soft Matter 2012; 35:45. [PMID: 22692685 DOI: 10.1140/epje/i2012-12045-6] [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] [Received: 10/03/2011] [Accepted: 05/18/2012] [Indexed: 06/01/2023]
Abstract
Granular pastes are dense dispersions of non-colloidal grains in a simple or a complex fluid. Typical examples are the coating, gluing or sealing mortars used in building applications. We study the rupture of a thick layer of mortar paste in a simple pulling test where the paste is confined between two flat surfaces. It is shown that, depending on the rheological properties of the paste and the plate separation velocity, two main failure modes are obtained. The first mode is the inwards shear flow of the paste with viscous fingering instabilities, similarly to what has been observed with Newtonian fluids and with non-Newtonian colloidal suspensions or polymer solutions. The second failure mode is stemming from the expansion of bubbles, similarly to what has been observed in soft adhesive polymer layers and, more recently, in highly viscous fluids. It is shown that the crossover between the two failure modes is determined by the conditions required to generate a pressure drop able to trigger the growth of pre-existing micro-bubbles smaller than the inter-granular distance.
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Michaud PA, Lüthi FT, Clerc M, Gachoud D, Chapuis J, Allin AC, Wagnières S, Morin D. [Interprofessional education for all... An awareness experience for undergraduate students in Vaud]. Rev Med Suisse 2011; 7:2363-2365. [PMID: 22232859] [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] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Affiliation(s)
- P-A Michaud
- Faculté de Biologie et de Médecine, Bugnon, Lausanne.
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7
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Chapuis J, Romero E, Bordreuil C, Soulié F, Fras G. Dynamic behavior of the weld pool in stationary GMAW. EPJ Web of Conferences 2010. [DOI: 10.1051/epjconf/20100607002] [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: 11/14/2022] Open
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Bensemain F, Hot D, Ferreira S, Dumont J, Bombois S, Maurage CA, Huot L, Hermant X, Levillain E, Hubans C, Hansmannel F, Chapuis J, Hauw JJ, Schraen S, Lemoine Y, Buée L, Berr C, Mann D, Pasquier F, Amouyel P, Lambert JC. Evidence for induction of the ornithine transcarbamylase expression in Alzheimer's disease. Mol Psychiatry 2009; 14:106-16. [PMID: 17893704 DOI: 10.1038/sj.mp.4002089] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
To more rapidly identify candidate genes located within chromosomal regions of interest defined by genome scan studies in Alzheimer's disease (AD), we have developed a customized microarray containing all the ORFs (n=2741) located within nine of these regions. Levels of gene expression were assessed in total RNA from brain tissue of 12 controls and 12 AD patients. Of all genes showing differential expression, we focused on the ornithine transcarbamylase (OTC) gene on Xp21.1., a key enzyme of the urea cycle which we found to be expressed in AD brains but not in controls, as confirmed by RT-PCR. We also detected mRNA expression of all the other urea cycle enzymes in AD brains. Immunochemistry experiments revealed that the OTC expression was strictly restricted to vascular endothelial cells in brain. Furthermore, OTC activity was 880% increased in the CSF of probable AD cases compared with controls. We analysed the association of the OTC -389 G/A and -241 A/G promoter polymorphisms with the risk of developing AD. We observed that rare haplotypes may be associated with the risk of AD through a possible modulation of the methylation of the OTC promoter. In conclusion, our results suggest the involvement of a new pathway in AD brains involving the urea cycle.
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Affiliation(s)
- F Bensemain
- INSERM, U744, Institut Pasteur de Lille, Université de Lille 2, Lille, France
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Abstract
The role of odors in food memory formation, especially for aversions, has long been considered secondary to taste. However, the importance of odor ingestion in conditioned odor aversion (COA) has recently challenged this assumption (B. M. Slotnick, F. Westbrook, & F. M. C. Darling, 1997). The aim of the present study was to evaluate the respective role of orthonasal and retronasal olfactory experience in COA acquisition, long-term retention, extinction, and spontaneous recovery. To this end, the odor was presented either close to the drinking spout (orthonasal stimulation) or close to and mixed with the drinking water (eliciting both orthonasal and retronasal stimulation). The authors brought evidence that odor ingestion was crucial for COA acquisition, especially when odor presentation and gastric malaise were separated by long delays. On the contrary, once formed, a distal (orthonasal) odor recognition was sufficient for COA to be retrieved. COA was odor specific and long lasting (more than 50 days). Moreover, results brought evidence for a spontaneous recovery of odor aversion tested 57 days after its extinction.
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Affiliation(s)
- Julie Chapuis
- Centre National de la Recherche Scientifique, UMR 5020, Neurosciences Sensorielles, Comportement, Cognition, Lyon, France.
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Courageot MP, Daude N, Nonno R, Paquet S, Di Bari MA, Le Dur A, Chapuis J, Hill AF, Agrimi U, Laude H, Vilette D. A cell line infectible by prion strains from different species. J Gen Virol 2008; 89:341-347. [PMID: 18089759 DOI: 10.1099/vir.0.83344-0] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
It has been shown previously that ovine prion protein (PrP(C)) renders rabbit epithelial RK13 cells permissive to the multiplication of ovine prions, thus providing evidence that species barriers can be crossed in cultured cells through the expression of a relevant PrP(C). The present study significantly extended this observation by showing that mouse and bank vole prions can be propagated in RK13 cells that express the corresponding PrP(C). Importantly, the respective molecular patterns of abnormal PrP (PrP(res)) and, where examined, the neuropathological features of the infecting strains appeared to be maintained during the propagation in cell culture. These findings indicate that RK13 cells can be genetically engineered to replicate prion strains faithfully from different species. Such an approach may facilitate investigations of the molecular basis of strain identity and prion diversity.
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Affiliation(s)
- M-P Courageot
- Virologie et Immunologie Moléculaires, INRA, 78350 Jouy-en-Josas, France
| | - N Daude
- Virologie et Immunologie Moléculaires, INRA, 78350 Jouy-en-Josas, France
| | - R Nonno
- Department of Food Safety and Veterinary Public Health, Istituto Superiore di Sanità, Rome, Italy
| | - S Paquet
- Virologie et Immunologie Moléculaires, INRA, 78350 Jouy-en-Josas, France
| | - M A Di Bari
- Department of Food Safety and Veterinary Public Health, Istituto Superiore di Sanità, Rome, Italy
| | - A Le Dur
- Virologie et Immunologie Moléculaires, INRA, 78350 Jouy-en-Josas, France
| | - J Chapuis
- Virologie et Immunologie Moléculaires, INRA, 78350 Jouy-en-Josas, France
| | - A F Hill
- Department of Biochemistry and Molecular Biology, Bio21, Molecular Science and Biotechnology Institute, University of Melbourne, Victoria, Australia
| | - U Agrimi
- Department of Food Safety and Veterinary Public Health, Istituto Superiore di Sanità, Rome, Italy
| | - H Laude
- Virologie et Immunologie Moléculaires, INRA, 78350 Jouy-en-Josas, France
| | - D Vilette
- Virologie et Immunologie Moléculaires, INRA, 78350 Jouy-en-Josas, France
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De Momi E, Chapuis J, Pappas I, Ferrigno G, Hallermann W, Schramm A, Caversaccio M. Automatic extraction of the mid-facial plane for cranio-maxillofacial surgery planning. Int J Oral Maxillofac Surg 2006; 35:636-42. [PMID: 16542822 DOI: 10.1016/j.ijom.2006.01.028] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2004] [Revised: 12/12/2005] [Accepted: 01/27/2006] [Indexed: 11/26/2022]
Abstract
Recently developed computer applications provide tools for planning cranio-maxillofacial interventions based on 3-dimensional (3D) virtual models of the patient's skull obtained from computed-tomography (CT) scans. Precise knowledge of the location of the mid-facial plane is important for the assessment of deformities and for planning reconstructive procedures. In this work, a new method is presented to automatically compute the mid-facial plane on the basis of a surface model of the facial skeleton obtained from CT. The method matches homologous surface areas selected by the user on the left and right facial side using an iterative closest point optimization. The symmetry plane which best approximates this matching transformation is then computed. This new automatic method was evaluated in an experimental study. The study included experienced and inexperienced clinicians defining the symmetry plane by a selection of landmarks. This manual definition was systematically compared with the definition resulting from the new automatic method: Quality of the symmetry planes was evaluated by their ability to match homologous areas of the face. Results show that the new automatic method is reliable and leads to significantly higher accuracy than the manual method when performed by inexperienced clinicians. In addition, the method performs equally well in difficult trauma situations, where key landmarks are unreliable or absent.
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Affiliation(s)
- E De Momi
- M.E. Müller Institute for Surgical Technology and Biomechanics, University of Bern, Switzerland
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Abstract
Prion diseases are fatal neurodegenerative disorders associated with an abnormal isoform of the PrPc host-encoded protein. Invalidation of the Prnp gene, that encodes PrPc, led to transgenic mice that are viable, apparently healthy, and resistant to challenge by the infectious agent. These results indicated that a down-regulation of the Prnp gene expression is a potential therapeutic approach. In the present report, we demonstrate that RNAi targeted towards the Prnp mRNA can efficiently and highly specifically reduce the level of PrPc in transfected cells. It, thus, indicates that RNAi is an attractive therapeutic approach to fight against prion diseases.
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Affiliation(s)
- G Tilly
- Laboratoire de Génétique Biochimique et de Cytogénétique, Institut National de la Recherche Agronomique, 78352 Jouy-en-Josas Cedex, France
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Kobayashi K, Ehrlich SD, Albertini A, Amati G, Andersen KK, Arnaud M, Asai K, Ashikaga S, Aymerich S, Bessieres P, Boland F, Brignell SC, Bron S, Bunai K, Chapuis J, Christiansen LC, Danchin A, Débarbouille M, Dervyn E, Deuerling E, Devine K, Devine SK, Dreesen O, Errington J, Fillinger S, Foster SJ, Fujita Y, Galizzi A, Gardan R, Eschevins C, Fukushima T, Haga K, Harwood CR, Hecker M, Hosoya D, Hullo MF, Kakeshita H, Karamata D, Kasahara Y, Kawamura F, Koga K, Koski P, Kuwana R, Imamura D, Ishimaru M, Ishikawa S, Ishio I, Le Coq D, Masson A, Mauël C, Meima R, Mellado RP, Moir A, Moriya S, Nagakawa E, Nanamiya H, Nakai S, Nygaard P, Ogura M, Ohanan T, O'Reilly M, O'Rourke M, Pragai Z, Pooley HM, Rapoport G, Rawlins JP, Rivas LA, Rivolta C, Sadaie A, Sadaie Y, Sarvas M, Sato T, Saxild HH, Scanlan E, Schumann W, Seegers JFML, Sekiguchi J, Sekowska A, Séror SJ, Simon M, Stragier P, Studer R, Takamatsu H, Tanaka T, Takeuchi M, Thomaides HB, Vagner V, van Dijl JM, Watabe K, Wipat A, Yamamoto H, Yamamoto M, Yamamoto Y, Yamane K, Yata K, Yoshida K, Yoshikawa H, Zuber U, Ogasawara N. Essential Bacillus subtilis genes. Proc Natl Acad Sci U S A 2003; 100:4678-83. [PMID: 12682299 PMCID: PMC153615 DOI: 10.1073/pnas.0730515100] [Citation(s) in RCA: 1042] [Impact Index Per Article: 49.6] [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: 11/18/2022] Open
Abstract
To estimate the minimal gene set required to sustain bacterial life in nutritious conditions, we carried out a systematic inactivation of Bacillus subtilis genes. Among approximately 4,100 genes of the organism, only 192 were shown to be indispensable by this or previous work. Another 79 genes were predicted to be essential. The vast majority of essential genes were categorized in relatively few domains of cell metabolism, with about half involved in information processing, one-fifth involved in the synthesis of cell envelope and the determination of cell shape and division, and one-tenth related to cell energetics. Only 4% of essential genes encode unknown functions. Most essential genes are present throughout a wide range of Bacteria, and almost 70% can also be found in Archaea and Eucarya. However, essential genes related to cell envelope, shape, division, and respiration tend to be lost from bacteria with small genomes. Unexpectedly, most genes involved in the Embden-Meyerhof-Parnas pathway are essential. Identification of unknown and unexpected essential genes opens research avenues to better understanding of processes that sustain bacterial life.
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Affiliation(s)
- K Kobayashi
- Graduate School of Information Science, Nara Institute of Science and Technology, Nara 630-0101, Japan
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Titok MA, Chapuis J, Selezneva YV, Lagodich AV, Prokulevich VA, Ehrlich SD, Jannière L. Bacillus subtilis soil isolates: plasmid replicon analysis and construction of a new theta-replicating vector. Plasmid 2003; 49:53-62. [PMID: 12584001 DOI: 10.1016/s0147-619x(02)00109-9] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
We have searched for plasmids in a collection of 55 Bacillus subtilis strains isolated from various natural sources of the territory of Belarus. Twenty percent of the strains contained one or two plasmids of either 6-8 or approximately 90 kb. Small plasmids were shown to carry a rolling circle replicon of the pC194 type. Four out of the eight large plasmids contained a related theta replicon that has no homolog in databases as shown by sequence determination. A B. subtilis/Escherichia coli shuttle vector based on this replicon was constructed. It has a low copy number (6 units per chromosome) and is stably inherited in B. subtilis. It might thus be a useful tool for DNA cloning. These data extend previous observations, indicating that most of the small plasmids of B. subtilis replicate as rolling circles and belong to the pC194 family. On the contrary, large plasmids appear to form a large pool of theta-replicating determinants, since three different replicons have already been isolated from them.
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Affiliation(s)
- M A Titok
- Department of Genetics and Biotechnology, Biological Faculty, Belarusian State University, Minsk 220050, 4 Scorina Avenue, Belarus
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Abstract
DNA replication in bacteria is carried out by a multiprotein complex, which is thought to contain only one essential DNA polymerase, specified by the dnaE gene in Escherichia coli and the polC gene in Bacillus subtilis. Bacillus subtilis genome analysis has revealed another DNA polymerase gene, dnaE(BS), which is homologous to dnaE. We show that, in B. subtilis, dnaE(BS) is essential for cell viability and for the elongation step of DNA replication, as is polC, and we conclude that there are two different essential DNA polymerases at the replication fork of B. subtilis, as was previously observed in eukaryotes. dnaE(BS) appears to be involved in the synthesis of the lagging DNA strand and to be associated with the replication factory, which suggests that two different polymerases carry out synthesis of the two DNA strands in B. subtilis and in many other bacteria that contain both polC and dnaE genes.
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Affiliation(s)
- E Dervyn
- Génétique Microbienne, Institut National de la Recherche Agronomique, Jouy-en-Josas, 78352 Cedex, France
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16
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Bolhuis A, Matzen A, Hyyryläinen HL, Kontinen VP, Meima R, Chapuis J, Venema G, Bron S, Freudl R, van Dijl JM. Signal peptide peptidase- and ClpP-like proteins of Bacillus subtilis required for efficient translocation and processing of secretory proteins. J Biol Chem 1999; 274:24585-92. [PMID: 10455123 DOI: 10.1074/jbc.274.35.24585] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.5] [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: 11/06/2022] Open
Abstract
Signal peptides direct the export of secretory proteins from the cytoplasm. After processing by signal peptidase, they are degraded in the membrane and cytoplasm. The resulting fragments can have signaling functions. These observations suggest important roles for signal peptide peptidases. The present studies show that the Gram-positive eubacterium Bacillus subtilis contains two genes for proteins, denoted SppA and TepA, with similarity to the signal peptide peptidase A of Escherichia coli. Notably, TepA also shows similarity to ClpP proteases. SppA of B. subtilis was only required for efficient processing of pre-proteins under conditions of hyper-secretion. In contrast, TepA depletion had a strong effect on pre-protein translocation across the membrane and subsequent processing, not only under conditions of hyper-secretion. Unlike SppA, which is a typical membrane protein, TepA appears to have a cytosolic localization, which is consistent with the observation that TepA is involved in early stages of the secretion process. Our observations demonstrate that SppA and TepA have a role in protein secretion in B. subtilis. Based on their similarity to known proteases, it seems likely that SppA and TepA are specifically required for the degradation of proteins or (signal) peptides that are inhibitory to protein translocation.
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Affiliation(s)
- A Bolhuis
- Department of Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, Kerklaan 30, 9751 NN Haren, The Netherlands
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Chapuis J, André E. [Surgery of the renal arteries. Nursing care]. Soins Chir 1991:21-4. [PMID: 1801130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Franceschi JP, Chapuis J, Curvale G, Roux H, Aquaviva P, Groulier P. [Bacillary trochanteritis. Apropos of 30 cases]. Rev Rhum Mal Osteoartic 1991; 58:433-9. [PMID: 1896784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Tuberculous trochanteritis is rare. The authors report 30 cases, 2/3 of which were seen in sanatoria. They occurred in four cases out of five in patients with long standing tuberculosis but were sometimes the presenting feature. Development of an abscess of the trochanteric serous bursa is a virtually constant complication. Their minimal functional consequences and slow progression endow them with an apparently benign nature which masks the risk of secondary complications (4 cases of coxalgia). Radiological appearances, minimal in early forms, are currently becoming more abundant by virtue of new medical imaging techniques. Specific antibiotic therapy is adequate in two cases out of three, completed in advanced and aggressive forms by local procedures dominated by surgical excision (13 cases).
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Affiliation(s)
- J P Franceschi
- Service de Chirurgie Orthopédique et Traumatologique, Hôpital de la Conception, Marseille
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Ackermann K, Chapuis J, Horning DE, Lacasse G, Muchowski JM. Dibenzo[a,d]cycloheptene and related compounds. II. The synthesis of some 11-substituted dibenzo[b,e]azepin-6-one, 5-substituted dibenzo[a,d]cycloheptene, and 12-substituted dibenzo[a,d]cyclooctene derivatives. CAN J CHEM 1969. [DOI: 10.1139/v69-717] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The synthesis of several 11-substituted-5,6-dihydro-11H-dibenzo[b,e]azepin-6-ones, and an improved method of preparing 5-cyano-10,11-dihydro-5H-dibenzo[a,d]cycloheptene and 12-cyano-5,6,7,12-tetrahydrodibenzo[a,d]cyclooctene are described.A description of the synthesis of epoxides from diaryl ketones and dimethylsulfonium methylide by a modified technique is given.The nuclear magnetic resonance spectra of several of the 11-substituted dibenzo[b,e]azepin-6-ones are interpreted on the basis of a slow interconversion between diastereomeric boat conformers in which the C-11 substituent is quasi axial or quasi equatorial.
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