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Abstract
INTRODUCTION Fibroma of the tendon sheath (FTS) is a rare benign tumour typically occurring in the extremities, but very rarely involving in the neck. CASE REPORT A 22-year-old male presented with a large painless mass of the right oropharynx. Magnetic resonance imaging (MRI) showed a well-circumscribed 7cm lesion in the right prestyloid space. The lesion was completely removed surgically. Histopathological examination revealed a fibroma of the tendon sheath of the stylohyoid muscle. DISCUSSION These tumours generally arise in the extremities of adults. To our knowledge, this is the first reported case of FTS in the neck.
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Affiliation(s)
- C Lelong
- Service d'otorhinolaryngologie et de chirurgie cervico-faciale, Université Libre de Bruxelles (ULB), CUB Hôpital Erasme, Brussels, Belgium.
| | - I Delpierre
- Service d'imagerie médicale, Université Libre de Bruxelles (ULB), CUB Hôpital Erasme, Brussels, Belgium
| | - M Remmelink
- Service d'anatomopathologie, Université Libre de Bruxelles (ULB), CUB Hôpital Erasme, Brussels, Belgium
| | - C Verbeurgt
- Service d'otorhinolaryngologie et de chirurgie cervico-faciale, Université Libre de Bruxelles (ULB), CUB Hôpital Erasme, Brussels, Belgium
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2
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Tran D, Michelet F, Lelong C, Hans D. TBS Association with Biomechanical Properties of Human Vertebrae, Ex-Vivo. J Clin Densitom 2018. [DOI: 10.1016/j.jocd.2017.10.031] [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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3
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Janvier T, Jennane R, Valery A, Harrar K, Delplanque M, Lelong C, Loeuille D, Toumi H, Lespessailles E. Subchondral tibial bone texture analysis predicts knee osteoarthritis progression: data from the Osteoarthritis Initiative: Tibial bone texture & knee OA progression. Osteoarthritis Cartilage 2017; 25:259-266. [PMID: 27742531 DOI: 10.1016/j.joca.2016.10.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 09/21/2016] [Accepted: 10/05/2016] [Indexed: 02/02/2023]
Abstract
OBJECTIVES To examine whether trabecular bone texture (TBT) parameters assessed on computed radiographs could predict knee osteoarthritis (OA) progression. METHODS This study was performed using data from the Osteoarthritis Initiative (OAI). 1647 knees in 1124 patients had bilateral fixed flexion radiographs acquired 48 months apart. Images were semi-automatically segmented to extract a patchwork of regions of interest (ROI). A fractal texture analysis was performed using different methods. OA progression was defined as an increase in the joint space narrowing (JSN) over 48 months. The predictive ability of TBT was evaluated using logistic regression and receiver operating characteristic (ROC) curve. An optimization method for features selection was used to reduce the size of models and assess the impact of each ROI. RESULTS Fractal dimensions (FD's) were predictive of the JSN progression for each method tested with an area under the ROC curve (AUC) up to 0.71. Baseline JSN grade was not correlated with TBT parameters (R < 0.21) but had the same predictive capacity (AUC 0.71). The most predictive model included the clinical covariates (age, gender, body mass index (BMI)), JSN and TBT parameters (AUC 0.77). From a statistical point of view we found higher differences in TBT parameters computed in medial ROI between progressors and non-progressors. However, the integration of TBT results from the whole patchwork including the lateral ROIs in the model provided the best predictive model. CONCLUSIONS Our findings indicate that TBT parameters assessed in different locations in the joint provided a good predictive ability to detect knee OA progression.
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Affiliation(s)
- T Janvier
- Univ. Orléans, I3MTO Laboratory, EA 4708, 45067 Orléans, France
| | - R Jennane
- Univ. Orléans, I3MTO Laboratory, EA 4708, 45067 Orléans, France
| | - A Valery
- CHR Orléans, Service de Rhumatologie, 45032 Orléans, France
| | - K Harrar
- Univ. M'Hamed Bougara Boumerdes, 35000 Boumerdes, Algeria
| | | | - C Lelong
- Med-Imaps SASU, 337700 Mérignac, France
| | - D Loeuille
- UMR 7561 - CHRU Nancy, 54511 Vandoeuvre les Nancy, France
| | - H Toumi
- Univ. Orléans, I3MTO Laboratory, EA 4708, 45067 Orléans, France; CHR Orléans, Service de Rhumatologie, 45032 Orléans, France
| | - E Lespessailles
- Univ. Orléans, I3MTO Laboratory, EA 4708, 45067 Orléans, France; CHR Orléans, Service de Rhumatologie, 45032 Orléans, France.
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Guillén EP, Chevalier F, Lelong C, Pate C, Robles C. A “3R's” example: Environmental, social and learning programs in Sanofi-aventis R&D. Toxicol Lett 2011. [DOI: 10.1016/j.toxlet.2011.05.1010] [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: 11/25/2022]
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5
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Chevallet M, Aude-Garcia C, Lelong C, Candéias S, Luche S, Collin-Faure V, Triboulet S, Diallo D, Diemer H, Dorsselaer AV, Rabilloud T. Effects of nanoparticles on murine macrophages. ACTA ACUST UNITED AC 2011. [DOI: 10.1088/1742-6596/304/1/012034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Farcy E, Fleury C, Lelong C, Dubos MP, Voiseux C, Fiévet B, Lebel JM. Molecular cloning of a new member of the p53 family from the Pacific oyster Crassostrea gigas and seasonal pattern of its transcriptional expression level. Mar Environ Res 2008; 66:300-308. [PMID: 18556058 DOI: 10.1016/j.marenvres.2008.04.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2008] [Revised: 04/21/2008] [Accepted: 04/28/2008] [Indexed: 05/26/2023]
Abstract
Like other sessile filter-feeding molluscs, oysters may be exposed in the natural environment to a variety of contaminants. Long-term exposure to pollutants may be one factor affecting prevalence of cancerous-like disorders, such as neoplasia. Environmentally induced alterations in p53 protein expression, in relation to leukemia, have been reported in various mollusc species inhabiting polluted water, suggesting that p53 proteins can also be used as a marker for environmental research. This work reports the cloning and sequencing of a p53-like cDNA in the mollusc bivalve Crassostreagigas. The deduced amino acid sequences of p53 shared a high degree of homology with the homologues from other mollusc species, including typical eukaryotic p53 signature sequences. We examined the p53 transcription expression pattern during the annual cycle in oyster gills and whole soft tissues in four locations along the French coasts. Real-time PCR analysis suggested that strong variations at p53 mRNA level are probably synchronized with the seasonal cycle at the four locations investigated.
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Affiliation(s)
- E Farcy
- Laboratoire de Biologie et Biotechnologies Marines, UMR M 100 Ifremer "Physiologie et Ecophysiologie des Mollusques Marins", IFR 146 ICORE, Université de Caen Basse-Normandie, Esplanade de la Paix, 14032 Caen Cedex, France
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7
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Lelong C, Badariotti F, Le Quéré H, Rodet F, Dubos MP, Favrel P. Cg-TGF-beta, a TGF-beta/activin homologue in the Pacific Oyster Crassostrea gigas, is involved in immunity against Gram-negative microbial infection. Dev Comp Immunol 2007; 31:30-8. [PMID: 16820208 DOI: 10.1016/j.dci.2006.05.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2006] [Revised: 05/02/2006] [Accepted: 05/05/2006] [Indexed: 05/10/2023]
Abstract
Transforming growth factor-beta (TGF-beta) members represent a widespread protein superfamily in the animal kingdom, but few members have been characterised in lophotrochozoans, a major clade of invertebrates. Here, we report the identification of Crassostrea gigas-TGF-beta (Cg-TGF-beta), a homologue of vertebrate TGF-beta and activin, from the bivalve mollusc C. gigas. Phylogenetic analysis suggests an early ancestral origin of this subgroup of TGF-beta superfamily member. Investigation of the spatio-temporal expression of Cg-TGF-beta gene by real-time quantitative RT-PCR showed a ubiquitous pattern in all adult tissues. These findings imply that Cg-TGF-beta has multiple functions as described for its vertebrate counterparts. Moreover, Cg-TGF-beta was upregulated in haemocytes during infection by a Gram-negative bacterium, suggesting that it could act as a cytokine involved in immunity in molluscs.
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Affiliation(s)
- C Lelong
- Laboratoire de Biologie et de Biotechnologies Marines, IBFA, EA 962-UMR 100 I.FR.E.MER, Physiologie et Ecophysiologie des Mollusques Marins, Université de Caen-Basse Normandie, Esplanade de la Paix, 14032 CAEN Cedex, France.
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Caillard S, Lelong C, Pessione F, Moulin B. Post-transplant lymphoproliferative disorders occurring after renal transplantation in adults: report of 230 cases from the French Registry. Am J Transplant 2006; 6:2735-42. [PMID: 17049061 DOI: 10.1111/j.1600-6143.2006.01540.x] [Citation(s) in RCA: 203] [Impact Index Per Article: 11.3] [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: 01/25/2023]
Abstract
Post-transplant lymphoproliferative disorders (PTLD) are a rare but serious complication after organ transplantation. A French Registry of PTLD was set up in a nationwide population of kidney transplant recipients. We prospectively enrolled all adult kidney recipients developing PTLD between January 1, 1998, and December 31, 2003. We analyzed the incidence, risk and prognostic factors of PTLD by Kaplan-Meier and Cox analyses. Totally 230 cases of PTLD were referred to the French Registry. Cumulative incidence was 1.18% after 5 years. Older age (per year, AHR = 2.19, CI = 1.22-3.94) and recipient Epstein-Barr virus seronegativity (AHR = 3.01, CI = 1.57-5.08) were associated with an increased risk of PTLD. Patients with PTLD had a reduced survival rate (61% at 5 years). Graft PTLD had the best prognosis with an 81% survival rate after 5 years. Infection with hepatitis C or B virus (HCV or HBV), late-onset PTLD, multiple sites involvement and high Ann Arbor staging were risk factors for patient death. Use of azathioprine was associated with a poorer survival rate. PTLD incidence and risk factors in French recipients are in line with the international or American PTLD series. We highlighted the role of HBV or HCV in patient mortality and described the relevant prognosis factors for patients with post-transplant lymphoproliferations.
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Affiliation(s)
- S Caillard
- Department of Nephrology and Renal Transplantation, Hôpitaux Universitaires de Strasbourg, France.
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9
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Herpin A, Lelong C, Becker T, Rosa FM, Favrel P, Cunningham C. Structural and functional evidences for a type 1 TGF-beta sensu stricto receptor in the lophotrochozoan Crassostrea gigas suggest conserved molecular mechanisms controlling mesodermal patterning across bilateria. Mech Dev 2004; 122:695-705. [PMID: 15817226 DOI: 10.1016/j.mod.2004.12.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2004] [Revised: 12/05/2004] [Accepted: 12/06/2004] [Indexed: 01/24/2023]
Abstract
The transforming growth factor beta (TGFbeta) superfamily includes bone morphogenetic proteins, activins and TGF-betasensu stricto (s.s.). These ligands have been shown to play a key role in numerous biological processes including early embryonic development and immune regulation. They transduce their signal through a hetromeric complex of type I and type II receptors. Such receptors have been identified in ecdysozoans but none have been found as yet in the other major protostomal clade, the lophotrochozoans. Here, we report the identification of the first lophotrochozoan TGFbetas.s. type I receptor (Cg-TGFbetaRI) from the mollusk Crassostrea gigas. The phylogenetic and structural analyses as well as the expression pattern during early development suggest Cg-TGFbetaRI to belong to the TGFbetas.s./activin type I receptor clade and functional studies corroborate these deductions. The use of the zebrafish embryo as a reporter organism reveals that either Cg-TGFbetaRI or its dominant negative acting truncated form, when overexpressed during gastrulation, resulted in a range of phenotypes displaying severe disturbance of anterioposterior patterning due to a strong modulation of ventrolateral mesoderm patterning. Finally, a Cg-TGFbetaRI cytokine activity during immune regulation in C. gigas has been investigated by real-time PCR in haemocytes and mantle edge during an in vivo bacterial LPS challenge. One piece of evidence from this study suggests that the molecular mechanisms controlling mesodermal patterning and some immune regulations across all bilateria could be conserved through a functional TGF-beta s.s. pathway in lophotrochozoans.
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MESH Headings
- Activin Receptors, Type I/chemistry
- Activin Receptors, Type I/metabolism
- Activins/metabolism
- Amino Acid Sequence
- Animals
- Base Sequence
- Body Patterning
- Cell Lineage
- Cloning, Molecular
- Cytokines/metabolism
- DNA, Complementary/metabolism
- Dimerization
- Escherichia coli/metabolism
- Exons
- Female
- Gastrula/metabolism
- Gene Expression Regulation, Developmental
- Genes, Reporter
- In Situ Hybridization
- Introns
- Ligands
- Lipopolysaccharides/pharmacology
- Male
- Mesoderm/metabolism
- Molecular Sequence Data
- Mollusca
- Phylogeny
- Polymerase Chain Reaction
- Protein Serine-Threonine Kinases
- RNA, Messenger/metabolism
- Receptor, Transforming Growth Factor-beta Type I
- Receptors, Transforming Growth Factor beta/chemistry
- Receptors, Transforming Growth Factor beta/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Zebrafish
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Affiliation(s)
- A Herpin
- Sars International Centre for Marine Molecular Biology, High Technology Centre, 5008 Bergen, Norway.
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10
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Fabioux C, Huvet A, Lelong C, Robert R, Pouvreau S, Daniel JY, Minguant C, Le Pennec M. Oyster vasa-like gene as a marker of the germline cell development in Crassostrea gigas. Biochem Biophys Res Commun 2004; 320:592-8. [PMID: 15219870 DOI: 10.1016/j.bbrc.2004.06.009] [Citation(s) in RCA: 109] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2004] [Indexed: 11/16/2022]
Abstract
The oyster vasa-like gene was previously demonstrated to be specifically expressed in germline cells of adult oysters Crassostrea gigas. In the present study, this gene was used as a molecular marker to establish the developmental pattern of germline cells during oyster ontogenesis, using whole-mount in situ hybridization and real-time PCR. The Oyvlg transcripts appeared to be localized to the vegetal pole of unfertilized oocytes and maternally transmitted to embryos. At early development, these maternal transcripts were observed to segregate into a single blastomere, from the CD macromere of 2-cell stage to the 4d mesentoblast of blastula. From late blastula stage, the mesentoblast divided into two cell clumps that migrated to both sides of the larvae body and that would correspond to primordial germ cells (PGCs). Based on these results, we postulate that the germline of C. gigas is specified at early development by maternal cytoplasmic determinants including Oyvlg mRNAs, in putative PGCs that would differentiate into germinal stem cells in juvenile oysters.
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Affiliation(s)
- C Fabioux
- UMR Physiologie et Ecophysiologie des Mollusques Marins, Ifremer, B.P.70, 29280 Plouzané, France
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11
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Minier C, Lelong C, Djemel N, Rodet F, Tutundjian R, Favrel P, Mathieu M, Leboulenger F. Expression and activity of a multixenobiotic resistance system in the Pacific oyster Crassostrea gigas. Mar Environ Res 2002; 54:455-459. [PMID: 12408601 DOI: 10.1016/s0141-1136(02)00195-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The multidrug resistance (MDR) mechanism corresponds to a defence system relying on the expression of high molecular membrane proteins that can actively lower the intracellular concentration of a wide variety of toxins, thus maintaining them below their toxic level. Using RT-PCR, expression levels of a gene belonging to the class I of mammalian mdr genes, has been assessed in different developmental stages of the oyster Crassostrea gigas. While no expression was found in the oocyte or the trocophore stage, a rise of mRNA content was observed from the veliger stage to the juvenile stage, thus indicating the induction of the system as the animal is developing in the environment. The incubation of gill fragments in the dye rhodamine B and subsequent measurements of intracellular fluorescence using a microplate reader indicates that the system can effectively decrease the accumulation of the test compound in a competitive manner with known inhibitors or environmental contaminants as observed in vertebrate cells. The oyster MXR system is thus becoming active in adult oyster and could be of importance in environmentally contaminated areas.
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Affiliation(s)
- C Minier
- LEMA, UPRES-EA 3222, University of Le Havre, France.
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12
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Abstract
Although believed to be widely distributed among the animal kingdom, transforming growth factor-beta (TGF-beta) superfamily members have mainly been characterized in vertebrate and in invertebrate model organisms such as Drosophila and C. elegans. To characterize such new factors in invertebrates, a PCR screen was performed on genomic DNA from different animal phyla, using degenerate primers deduced from consensus sequences of known members of the TGF-beta superfamily. Four new members were identified from a cnidaria, an echinoderm and from two classes of molluscs. These new proteins exhibit a high degree of identity with human bone morphogenetic proteins (BMP2/4). Sequence comparisons suggest an early origin and an evolutionary conservation of the molecular conformation. However, their possible involvement in distinct regulatory pathways is discussed.
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Affiliation(s)
- C Lelong
- Université de Caen, IBBA, Laboratoire de Biologie et Biotechnologies Marines, IFREMER, URM 14, Esplanade de la Paix, 14032 cedex, Caen, France
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13
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Lelong C, Mathieu M, Favrel P. Structure and expression of mGDF, a new member of the transforming growth factor-beta superfamily in the bivalve mollusc Crassostrea gigas. Eur J Biochem 2000; 267:3986-93. [PMID: 10866797 DOI: 10.1046/j.1432-1327.2000.01432.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
To gain insight into the evolution of the structure and functions of transforming growth factor (TGF)-beta superfamily members, a cDNA encoding a new member from the bivalve mollusc Crassostrea gigas named mGDF (molluscan growth and differentiation factor) was identified by PCR using degenerate primers. The mGDF precursor exhibits characteristic features of the TGF-beta superfamily and shows highest homology with human BMP2 and Drosophila DPP. Conversely, the mgdf gene displays a distinct pattern of expression during development. Indeed mgdf transcripts were not detected early in development but increased markedly before metamorphosis. These findings raise the possibility that mGDF could play a central role in the biological processes that allow larvae to become competent to metamorphose.
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Affiliation(s)
- C Lelong
- Université de Caen, IBBA, Laboratoire de Biologie et Biotechnologies Marines, IFREMER URM 14, France
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14
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Abstract
FMRFamide immunoreactivity is widespread in the tissues of bivalve molluscs, but some of this immunoreactivity may represent distinct related peptides (FaRPs) rather than the exact tetrapeptide FMRFamide. We have cloned the first full-length cDNA encoding the precursor protein for FMRFamide from this class of molluscs to investigate the possibility that additional peptides may be produced. The precursor contains one copy each of NFLRFamide, FLRFamide, ALAGDHFFRFamide and 16 copies of FMRFamide. This precursor is expressed in all three ganglia of the central nervous system. Since the gene encoding the FMRFamide precursor in pulmonate molluscs is alternatively spliced to give two distinct messages, we searched for evidence that the FMRFamide gene of Mytilus is also alternatively spliced. No evidence of alternative splicing was found.
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Affiliation(s)
- P Favrel
- Laboratoire de Biologie et Biotechnologies Marines, IBBA IFREMER URM 14, Université de Caen, France
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Bouin C, Lelong C, Labat F, Duvinage C, Plard J, Guittin P. Ophthalmological historical control database on laboratory animals. Toxicol Lett 1998. [DOI: 10.1016/s0378-4274(98)80687-5] [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: 11/29/2022]
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Favrel P, Lelong C, Mathieu M. Control of growth and differentiation in bivalve mollusc larvae. Molecular characterization of a new factor from the oyster Crassostrea gigas. Ann N Y Acad Sci 1998; 839:316-20. [PMID: 9629168 DOI: 10.1111/j.1749-6632.1998.tb10783.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- P Favrel
- Laboratoire de Biologie et Biotechnologies Marines, IBBA, IFREMER URM 14, Université de Caen, France
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17
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Presecan E, Moszer I, Boursier L, Ramos HC, de la Fuente V, Hullo MF, Lelong C, Schleich S, Sekowska A, Song BH, Villani G, Kunst F, Danchin A, Glaser P. The Bacillus subtilis genome from gerBC (311 degrees) to licR (334 degrees). Microbiology (Reading) 1997; 143 ( Pt 10):3313-3328. [PMID: 9353933 DOI: 10.1099/00221287-143-10-3313] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
As part of the international project to sequence the Bacillus subtilis genome, the DNA region located between gerBC (311 degrees) and licR (334 degrees) was assigned to the institut Pasteur. In this paper, the cloning and sequencing of 176 kb of DNA and the analysis of the sequence of the entire 271 kb region (6.5% of the B. subtilis chromosome) is described; 273 putative coding sequences were identified. Although the complete genome sequences of seven other organisms (five bacteria, one archaeon and the yeast Saccharomyces cerevisiae) are available in public database, 65 genes from this region of the B. subtilis chromosome encode proteins without significant similarities to other known protein sequences. Among the 208 other genes, 115 have paralogues in the currently known B. subtilis DNA sequences and the products of 178 genes were found to display similarities to protein sequences from public databases for which a function is known. Classification of these genes shows a high proportion of them to be involved in the adaptation to various growth conditions (non-essential cell wall constituents, catabolic and bioenergetic pathways); a small number of the genes are essential or encode anabolic enzymes.
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Affiliation(s)
- E Presecan
- Unité de Régulation de I'Expression GénéeTique Institut Pasteur, 28 rue du Docteur Roux, 75724 Paris Cedex 15, France
| | - I Moszer
- Unité de Régulation de I'Expression GénéeTique Institut Pasteur, 28 rue du Docteur Roux, 75724 Paris Cedex 15, France
| | - L Boursier
- Unité de Régulation de I'Expression GénéeTique Institut Pasteur, 28 rue du Docteur Roux, 75724 Paris Cedex 15, France
| | - H Cruz Ramos
- Unité de Régulation de I'Expression GénéeTique Institut Pasteur, 28 rue du Docteur Roux, 75724 Paris Cedex 15, France
| | - V de la Fuente
- Unité de Biochimie Microbienne Institut Pasteur, 28 rue du Docteur Roux, 75724 Paris Cedex 15, France
| | - M-F Hullo
- Unité de Biochimie Microbienne Institut Pasteur, 28 rue du Docteur Roux, 75724 Paris Cedex 15, France
- Unité de Régulation de I'Expression GénéeTique Institut Pasteur, 28 rue du Docteur Roux, 75724 Paris Cedex 15, France
| | - C Lelong
- Unité de Régulation de I'Expression GénéeTique Institut Pasteur, 28 rue du Docteur Roux, 75724 Paris Cedex 15, France
| | - S Schleich
- Unité de Régulation de I'Expression GénéeTique Institut Pasteur, 28 rue du Docteur Roux, 75724 Paris Cedex 15, France
| | - A Sekowska
- Unité de Régulation de I'Expression GénéeTique Institut Pasteur, 28 rue du Docteur Roux, 75724 Paris Cedex 15, France
| | - B H Song
- Unité de Régulation de I'Expression GénéeTique Institut Pasteur, 28 rue du Docteur Roux, 75724 Paris Cedex 15, France
| | - G Villani
- Unité de Régulation de I'Expression GénéeTique Institut Pasteur, 28 rue du Docteur Roux, 75724 Paris Cedex 15, France
| | - F Kunst
- Unité de Biochimie Microbienne Institut Pasteur, 28 rue du Docteur Roux, 75724 Paris Cedex 15, France
| | - A Danchin
- Unité de Régulation de I'Expression GénéeTique Institut Pasteur, 28 rue du Docteur Roux, 75724 Paris Cedex 15, France
| | - P Glaser
- Unité de Régulation de I'Expression GénéeTique Institut Pasteur, 28 rue du Docteur Roux, 75724 Paris Cedex 15, France
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Lelong C, Boekema EJ, Kruip J, Bottin H, Rögner M, Sétif P. Characterization of a redox active cross-linked complex between cyanobacterial photosystem I and soluble ferredoxin. EMBO J 1996. [DOI: 10.1002/j.1460-2075.1996.tb00569.x] [Citation(s) in RCA: 73] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Lelong C, Boekema EJ, Kruip J, Bottin H, Rögner M, Sétif P. Characterization of a redox active cross-linked complex between cyanobacterial photosystem I and soluble ferredoxin. EMBO J 1996; 15:2160-8. [PMID: 8641281 PMCID: PMC450138] [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: 02/01/2023] Open
Abstract
A covalent stoichiometric complex between photosystem I (PSI) and ferredoxin from the cyanobacterium Synechocystis sp. PCC 6803 was generated by chemical cross-linking. The photoreduction of ferredoxin, studied by laser flash absorption spectroscopy between 460 and 600 nm, is a fast process in 60% of the covalent complexes, which exhibit spectral and kinetic properties very similar to those observed with the free partners. Two major phases with t(1/2) <1 micros and approximately 10-14 micros are observed at two different pH values (5.8 and 8.0). The remaining complexes do not undergo fast ferredoxin reduction and 20-25% of the complexes are still able to reduce free ferredoxin or flavodoxin efficiently, thus indicating that ferredoxin is not bound properly in this proportion of covalent complexes. The docking site of ferredoxin on PSI was determined by electron microscopy in combination with image analysis. Ferredoxin binds to the cytoplasmic side of PSI, with its mass center 77 angstroms distant from the center of the trimer and in close contact with a ridge formed by the subunits PsaC, PsaD and PsaE. This docking site corresponds to a close proximity between the [2Fe- 2S] center of ferredoxin and the terminal [4Fe-4S] acceptor FII of PSI and is very similar in position to the docking site of flavodoxin, an alternative electron acceptor of PSI.
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Affiliation(s)
- C Lelong
- Departement de Biologie Cellulaire et Moleculaire, Gif-sur- Yvette, France
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Lelong C, Sétif P, Bottin H, André F, Neumann JM. 1H and 15N NMR sequential assignment, secondary structure, and tertiary fold of [2Fe-2S] ferredoxin from Synechocystis sp. PCC 6803. Biochemistry 1995; 34:14462-73. [PMID: 7578051 DOI: 10.1021/bi00044a024] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.3] [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: 01/26/2023]
Abstract
The [2Fe-2S] ferredoxin extracted from Synechocystis sp. PCC 6803 was studied by 1H and 15N nuclear magnetic resonance. Sequence-specific 1H and 15N assignment of amino acid residues far from the paramagnetic cluster (distance higher than 8 A) was performed. Interresidue NOE constraints have allowed the identification of several secondary structure elements: one beta sheet composed of four beta strands, one alpha helix, and two alpha helix turns. The analysis of interresidue NOEs suggests the existence of a disulfide bridge between the cysteine residues 18 and 85. Such a disulfide bridge has never been observed in plant-type ferredoxins. Structure modeling using the X-PLOR program was performed with or without assuming the existence of a disulfide bridge. As a result, two structure families were obtained with rms deviations of 2.2 A. Due to the lack of NOE connectivities resulting from the paramagnetic effect from the [2Fe-2S] cluster, the structures were not well resolved in the region surrounding the [2Fe-2S] cluster, at both extremities of the alpha helix and the C and N terminus segments. In contrast, when taken separately, the beta sheet and the alpha helix were well defined. This work is the first report of a structure model of a plant-type [2Fe-2S] Fd in solution.
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Affiliation(s)
- C Lelong
- CEA, Département de Biologie Cellulaire et Moléculaire, Gif sur Yvette, France
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Ferrand N, Astesano A, Phan HH, Lelong C, Rosselin G. Dynamics of pancreatic cell growth and differentiation during diabetes reversion in STZ-treated newborn rats. Am J Physiol 1995; 269:C1250-64. [PMID: 7491916 DOI: 10.1152/ajpcell.1995.269.5.c1250] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Cellular processes underlying ontogenesis and regression of streptozotocin (STZ)-induced diabetes in newborn rats were investigated at the most severe stage of diabetes at day 3 and after recovery of normoglycemia at day 8 by immunocytochemistry and quantitative analysis. A previously unknown endocrine cell type subpopulation (PEPS) was identified. It was characterized by granule polymorphism, coexpression of insulin and glucagon immunoreactivity, and a proliferative capacity transiently higher than in B cells. In STZ-treated rats at day 3, B cell mass decreased 14-fold, whereas PEPS cells were unaffected. The islet mass was restored to 55.7% by day 8, with a concomitant appearance of numerous small islets contiguous to small ducts. B cell mass increased by 6.9-fold compared with 1.8-fold in control rats, although proliferative capacities remained similar. Proliferation dropped considerably by day 8, preventing complete B cell mass recovery in STZ-treated rats. STZ-induced neonatal diabetes thus stimulates neogenesis of islets close to ducts and proliferation of PEPS cells. Those partially differentiated islet cells appear to be on the differentiation pathway of stem cells to fully differentiated B cells.
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Affiliation(s)
- N Ferrand
- Unité de Recherches sur les Peptides Neurodigestifs et le Diabète, Institut National de la Santé et de la Recherche Médicale U.55, Centre de Recherches Paris-Saint-Antoine, France
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Lelong C, Sétif P, Lagoutte B, Bottin H. Identification of the amino acids involved in the functional interaction between photosystem I and ferredoxin from Synechocystis sp. PCC 6803 by chemical cross-linking. J Biol Chem 1994; 269:10034-9. [PMID: 8144501] [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: 01/29/2023] Open
Abstract
Ferredoxin isolated from the cyanobacterium Synechocystis sp. PCC 6803 has been chemically cross-linked to purified photosystem I from the same organism. The reaction was catalyzed by N-ethyl-3-(3-dimethylaminopropyl)carbodiimide in the presence of N-hydroxysulfosuccinimide. A short reaction time and neutral pH values can be used in the presence of the two reagents, ensuring the integrity of both of the proteins and the iron-sulfur cluster of the ferredoxin. The only covalent complex detected comprised ferredoxin and the photo-system I (PSI)-D subunit, as identified by antibodies probing after electrophoresis. Electron paramagnetic resonance measurements of this covalent complex have shown that the cross-linked ferredoxin was entirely photoreducible by photosystem I and that the molar ratio of ferredoxin to PSI was close to 1. Extensive sequencing of the peptides obtained after proteolysis of the purified cross-linked product led to the identification of a covalent bond between glutamic acid 93 of ferredoxin and lysine 106 of the PSI-D subunit.
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Affiliation(s)
- C Lelong
- Service de Bioénergétique/URA 1290 (CNRS), Département de Biologie Cellulaire et Moléculaire, C. E. A., Saclay, Gif sur Yvette, France
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Lelong C, Sétif P, Lagoutte B, Bottin H. Identification of the amino acids involved in the functional interaction between photosystem I and ferredoxin from Synechocystis sp. PCC 6803 by chemical cross-linking. J Biol Chem 1994. [DOI: 10.1016/s0021-9258(17)36986-7] [Citation(s) in RCA: 75] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Drevet JG, Auberge T, Magnol A, Lelong C, Blanc D, Ramponneau JP. [Microtraumatic pathology of the lumbar isthmus: isthmic lysis or spondylolysis]. Rev Rhum Mal Osteoartic 1990; 57:385-92. [PMID: 2142798] [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: 12/30/2022]
Abstract
The authors report the study of a series of 23 partial isthmic lyses which occurred in a young population (15 cases) and in an adult one (8 cases) between 1983 and 1988, in the form of persistent lumbosacral pains. The initial radiological signs, the key to an early diagnosis, are defined: cortical notches more often regarding the lower cortex than the upper one, incomplete fissures reaching the two cortical poles, gradual narrowing of the isthmus. The value of standard radiography is underlined, with the oblique incidences close to the profile regularly ensuring the diagnosis, with the exception of 4 cases out of 23 for which tomography was required. As regards the evolution, the value of the diagnosis of the initial lesions is recalled, giving the hope of a restoration of the posterior inter-articular fractures by a rigid setting (4 months on average). This ability to reconstruct the lumbar isthmus is observed in the young subjects (10 out of 13 immobilizations) but also in the adult subjects (3 reconstructions for 5 immobilizations carried out). These results enable the early detection of prelytic states, in order to administer an suitable treatment resting on the rigid setting of the lumbosacral region, re-education and the control of the risk factors.
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Affiliation(s)
- J G Drevet
- Centre Clinique Rhumatologique, Grenoble
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Drevet JG, Phelip X, Lelong C, Pelletier M, Gallin-Martel C. [Education and social rehabilitation of lumbalgic patients]. Rev Rhum Mal Osteoartic 1988; 55:755-9. [PMID: 2973650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- J G Drevet
- Service de Rhumatologie et de Rééducation Fonctionnelle
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Lelong C, Drevet JG, Chevallier R, Phelip X. [Spinal biomechanics and the sitting position]. Rev Rhum Mal Osteoartic 1988; 55:375-80. [PMID: 3387881] [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: 01/05/2023]
Abstract
Our study was conducted in two stages. In a first stage, elaboration of a reliable biomechanical model for the lumbar spine, permitting to calculate for each lumbar level, for a definite posture and a given patient, the normal and tangential forces as well as the overall stresses applied to the disc, and represented by the intradiscal pressure of the nucleus pulposus and the overall stresses in the annulus fibers. This biomechanical model was constructed with the help of radiographs and formulas of forces and moments balance in comparison with a reference axis system. This biomechanical model was then used to compare stresses on the disc in various sitting positions, in order to determine an ergonomic adaptation of the sitting position at work.
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Affiliation(s)
- C Lelong
- Clinique Rhumatologique, CHU de Grenoble
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Drevet JG, Phelip X, Lelong C, Juvin R, Saragaglia D. [Compression of the musculocutaneous nerve on the dorsal aspect of the foot. Apropos of a bilateral case]. Rev Rhum Mal Osteoartic 1986; 53:670-1. [PMID: 3616453] [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: 01/06/2023]
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Drevet JG, Carpentier PH, Lelong C, Juvin R, Franco A, Phelip X. [Periungual capillaroscopy in rheumatoid arthritis. Prospective study of 80 cases]. Rev Rhum Mal Osteoartic 1986; 53:367-71. [PMID: 2429362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
This study involved the screening for dermal microcirculatory abnormalities using periungueal capillaroscopy in a group of 80 cases of rheumatoid arthritis, so-defined in terms of ARA criteria. Excessive erythrocyte aggregation and/or pericapillary edema were detected in 74% of cases and were statistically correlated with ESR, reflecting an inflammatory syndrome. Capillary neogenesis, probably in reaction to subclinical cutaneous vascularity, was detected in 59% of cases (86% of subjects presenting extra-articular rheumatism). In 28% of cases this was accompanied by spontaneous hemorrhage, suggesting a progressive condition. Stigmata of cutaneous atrophy were present in 54% of subjects. These findings demonstrate the frequency of subclinical cutaneous damage in rheumatoid disease and suggest the possibility of the clinical usefulness of capillaroscopy, a non-invasive technic, in the follow-up of this disease.
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Phélip X, Drevet JG, Gallin-Martel C, Lelong C, Grimal C. [The back in everyday life]. Rev Rhum Mal Osteoartic 1985; 52:661-4. [PMID: 2937132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The adaptation of man to an erect posture is the result of phylogenetic as well as ontogenetic evolution of the spinal structures and is largely responsible for the development of back pain. Apart from the specific conditions of overwork, a large number of physical activities and certain postures maintained over long periods of time can favour the development of back pain. The prevention of benign back pain therefore depends on a re-education of the correct use of the back. This can be performed in the form of individual prevention or in small groups of subjects suffering from back pain in whom a high risk activity can be isolated in order to direct the re-education. Primary prevention can also be considered in subjects not presenting back pain, consisting of a better knowledge of the back and its correct use.
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Lelong C. For beef cattle, all forms of maize can be used. Anim Feed Sci Technol 1976. [DOI: 10.1016/0377-8401(76)90111-5] [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: 10/27/2022]
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