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Mesny E, Barritault M, Izquierdo C, Poncet D, d’Hombres A, Guyotat J, Jouanneau E, Ameli R, Honnorat J, Meyronet D, Ducray F. P14.12 Gyriform infiltration as imaging biomarker for adult diffuse astrocytic glioma, IDH wildtype, with molecular features of glioblastoma. Neuro Oncol 2021. [DOI: 10.1093/neuonc/noab180.137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
BACKGROUND
Diffuse astrocytic gliomas, IDH wildtype, with molecular features of glioblastoma (molecular glioblastomas) are associated with a poor prognosis. We previously found that these tumors frequently display gyriform infiltration, defined as areas of elective cortical hypersignal on MRI FLAIR sequence. The objective of the present study was to assess the diagnostic value of gyriform infiltration as an imaging marker for these tumors.
MATERIAL AND METHODS
MRI scans from 430 patients with newly diagnosed glioma (molecular glioblastoma n = 31, IDH wildtype glioblastoma n = 298, IDH-mutant astrocytoma n = 50, IDH-mutant and 1p19q codeleted oligodendroglioma n= 51) were evaluated for the presence of a gyriform infiltration by 2 independent reviewers. Sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) were calculated to assess the performance of the presence of a gyriform infiltration for identifying molecular glioblastoma.
RESULTS
A gyriform infiltration was observed in 16/31 (52%) patients with a molecular glioblastoma, 40/298 (13%) patients with an IDH-wildtype glioblastoma but in none of the patients with an IDH-mutant astrocytomas or an IDH-mutant and 1p19q codeleted oligodendroglioma. Among the 56 patients with a gyriform infiltration, 54 patients had an IDH wildtype pTERT mutant glioma and 2 an IDH wildtype pTERT wildtype glioma. Interrater agreement was good (κ= 0.68, P < 0.001). Specificity, sensitivity, PPV and NPV of the presence of a gyriform infiltration for the diagnosis of molecular glioblastoma were 90%, 29%, 52% and 96% and for the diagnosis of an IDHwt pTERT mutant glioma were 97%, 15%, 96% and 20%. The presence of a gyriform infiltration was associated with a worse prognosis in the entire cohort (13.6 months vs 29.3 months, P = .001).
CONCLUSION
Gyriform infiltration is a specific imaging marker of molecular glioblastomas and IDH wildtype pTERT mutant diffuse gliomas.
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Affiliation(s)
- E Mesny
- Hospices Civils de Lyon, Groupe Hospitalier Est, Service de neuro-oncologie, Lyon, France
| | - M Barritault
- Hospices Civils de Lyon, Groupe Hospitalier Est, Service d’anatomopathologie, Lyon, France
| | - C Izquierdo
- Hospices Civils de Lyon, Groupe Hospitalier Est, Service de neuro-oncologie, Lyon, France
| | - D Poncet
- Hospices Civils de Lyon, Groupe Hospitalier Est, Service d’anatomopathologie, Lyon, France
| | - A d’Hombres
- Hospices Civils de Lyon, CHU Lyon Sud, Service de radiothérapie, Lyon, France
| | - J Guyotat
- Hospices Civils de Lyon, Groupe Hospitalier Est, Service de neuro-chirurgie, Lyon, France
| | - E Jouanneau
- Hospices Civils de Lyon, Groupe Hospitalier Est, Service de neuro-chirurgie, Lyon, France
| | - R Ameli
- Hospices Civils de Lyon, Groupe Hospitalier Est, Service de radiologie, Lyon, France
| | - J Honnorat
- Hospices Civils de Lyon, Groupe Hospitalier Est, Service de neuro-oncologie, Lyon, France
| | - D Meyronet
- Hospices Civils de Lyon, Groupe Hospitalier Est, Service d’anatomopathologie, Lyon, France
| | - F Ducray
- Hospices Civils de Lyon, Groupe Hospitalier Est, Service de neuro-oncologie, Lyon, France
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Picart T, Poncet D, Barritault M, Pallud J, Metellus P, Zouaoui S, Bauchet L, Guyotat J, Gabut M, Honnorat J, Ducray F, Meyronet D. OS02.4.A Molecular characterization of adult cerebellar glioblastomas identifies distinct prognosis subgroups. Neuro Oncol 2021. [DOI: 10.1093/neuonc/noab180.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
BACKGROUND
Adult cerebellar glioblastomas (cGBM) are very rare and recent studies have shown that they constitute a heterogeneous group of gliomas. The aim of the present study was to characterize the prevalence and prognostic significance of major driver molecular alterations in a large series of cGBM.
MATERIAL AND METHODS
Adults with histologically proven cGBM diagnosed between 2003 and 2017 were identified from the French brain tumor database and the Club de Neuro-Oncologie of the Société Française de Neurochirurgie. Tumors were reviewed and reclassified according to WHO 2016. Targeted sequencing was performed, including determination of H3F3A, TERTp, IDH1/2, FGFR1, BRAF and EGFR status.
RESULTS
A total of 83 adult patients (median age 57 years) with cGBM (hemispheric n= 47, vermian n=14 or both n=22) were identified. Median overall survival was 10 months. Main molecular alterations observed were TERT promoter, H3F3A K27M, hotspot FGFR1 (N546 and K656), BRAF mutations, EGFR amplification and ATRX loss of expression in 19.2%, 18.8%, 10.9%, 2.6%, 19.5% and 22.7% of patients, respectively. cGBM could be classified into 6 mutually exclusive subgroups associated with age at diagnosis and prognosis: pTERT and/or EGFR amplified tumors (n=22, 26.5%, median age = 62 years, median OS = 4 months), H3K27M-mutant tumors (n=15, 18.1%, median age = 48 years, median OS =8 months), tumors with MAPK pathway activating mutations (FGFR1, BRAF) or occurring in NF1 patients (n=15, 18.1%, median age = 41 years, median OS = 57 months), radiation-induced tumors (n=5, 6%, median age = 47 years, median OS = 5 months), IDH-mutant tumors (n=1) and unclassified tumors (n=25, 30.1%, median age = 63 years, median OS = 17 months). In multivariate analysis, MAPK activating mutations and ATRX loss of expression were independently associated with a better outcome and pTERT/EGFR alterations with a worse outcome.
CONCLUSION
About 18% of tumors diagnosed as cGBM harbor actionable MAPK activating genetic alterations. Targeted sequencing enables to classify these tumors into clinically relevant subgroups.
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Affiliation(s)
- T Picart
- Hospices Civils de Lyon, Department of Neurosurgery, Lyon, France
| | - D Poncet
- Hospices Civils de Lyon, Department of Neuropathology and Molecular Biology, Lyon, France
| | - M Barritault
- Hospices Civils de Lyon, Department of Neuropathology and Molecular Biology, Lyon, France
| | - J Pallud
- Hôpital Sainte Anne, Department of Neurosurgery, Paris, France
| | - P Metellus
- Hôpital Privé Clairval, Department of Neurosurgery, Marseille, France
| | - S Zouaoui
- CHU de Montpellier, French Brain Tumor Database, Montpellier, France
| | - L Bauchet
- CHU de Montpellier, Department of Neurosurgery, Montpellier, France
| | - J Guyotat
- Hospices Civils de Lyon, Department of Neurosurgery, Lyon, France
| | - M Gabut
- CRCL, Department of Cancer Cell Plasticity, Lyon, France
| | - J Honnorat
- Hospices Civils de Lyon, Department of Neurooncology, Lyon, France
| | - F Ducray
- Hospices Civils de Lyon, Department of Neurooncology, Lyon, France
| | - D Meyronet
- Hospices Civils de Lyon, Department of Neuropathology and Molecular Biology, Lyon, France
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Grisard S, Franquet Q, Garnier-Crussard A, Poncet D, Overs C, Matillon X, Long JA, Descotes JL, Badet L, Abid N, Fiard G. Miniaturized percutaneous nephrolithotomy versus retrograde intrarenal surgery in the treatment of lower pole renal stones. Prog Urol 2021; 32:77-84. [PMID: 34332831 DOI: 10.1016/j.purol.2021.07.003] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 06/30/2021] [Accepted: 07/06/2021] [Indexed: 10/20/2022]
Abstract
OBJECTIVES Miniaturization of percutaneous nephrolithotomy techniques have led to their increased consideration for lower pole renal stones that can prove more challenging to reach using retrograde intrarenal surgery. The objectives of the present study were to evaluate and compare the outcomes of miniaturized percutaneous nephrolithotomy (miniPCNL) and retrograde intrarenal surgery (RIRS) for the treatment of lower pole renal stones. MATERIALS AND METHODS A retrospective study was performed in two academic urology departments between January 2016 and June 2019. Patients presenting with one or multiple stones of the lower calyx and/or renal pelvis, between 10 and 40mm based on CT-scan treated by miniPCNL or RIRS were included. RESULTS In all, 115 miniPCNL and 118 RIRS procedures were included. The rate of patients with no significant residual fragment (stone free rate) after the first procedure was higher in the miniPCNL group (69% vs. 52% P=0.01), especially for stones>20mm (63% vs. 24% respectively, P<0.001) and stones with a density≥1000HU (69% vs. 42% respectively, P=0.009). The higher stone free rate of miniPCNL was confirmed in multivariate analysis, adjusting for stone size and number of stones, OR 4.02 (95% CI 2.08-8.11, P<0.0001). The overall postoperative complication rate was higher in the miniPCNL group than in the RIRS group (23% vs. 11%, P=0.01). A second intervention for the treatment of residual fragments was necessary for 9.6% of patients in the miniPCNL group versus 30.5% of patients in the RIRS group (P<0.001). Pre-stenting rate and duration of ureteral drainage (2 [1-8] vs. 25 days [7-37], P<0.001) were lower in the miniPCNL group. CONCLUSIONS The stone free rate was higher after miniPCNL, especially for stones>20mm and with a density>1000 HU, but was associated with a higher risk of postoperative complications and a longer hospital stay. RIRS resulted in fewer complications at the cost of a higher retreatment rate and longer ureteral stenting. LEVEL OF EVIDENCE 3.
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Affiliation(s)
- S Grisard
- Department of urology, Grenoble Alpes University Hospital, Grenoble, France
| | - Q Franquet
- Department of urology, Grenoble Alpes University Hospital, Grenoble, France
| | - A Garnier-Crussard
- Clinical and Research Memory Center of Lyon, Lyon Institute for Elderly, Hospices Civils de Lyon, Lyon, France; University of Lyon, Lyon, France
| | - D Poncet
- Department of urology, Grenoble Alpes University Hospital, Grenoble, France
| | - C Overs
- Department of urology, Grenoble Alpes University Hospital, Grenoble, France
| | - X Matillon
- University of Lyon, Lyon, France; Department of urology, Hôpital Édouard Herriot, Hospices Civils de Lyon, Lyon, France
| | - J A Long
- Department of urology, Grenoble Alpes University Hospital, Grenoble, France; Université Grenoble Alpes, CNRS, Grenoble INP, TIMC-IMAG, Grenoble, France
| | - J L Descotes
- Department of urology, Grenoble Alpes University Hospital, Grenoble, France; Université Grenoble Alpes, CNRS, Grenoble INP, TIMC-IMAG, Grenoble, France
| | - L Badet
- University of Lyon, Lyon, France; Department of urology, Hôpital Édouard Herriot, Hospices Civils de Lyon, Lyon, France
| | - N Abid
- Department of urology, Hôpital Édouard Herriot, Hospices Civils de Lyon, Lyon, France
| | - G Fiard
- Department of urology, Grenoble Alpes University Hospital, Grenoble, France; Université Grenoble Alpes, CNRS, Grenoble INP, TIMC-IMAG, Grenoble, France.
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Ramakrishnan A, Joseph SS, Reynolds ND, Poncet D, Maciel M, Nunez G, Espinoza N, Nieto M, Castillo R, Royal JM, Poole S, McVeigh A, Rollenhagen JE, Heinrichs J, Prouty MG, Simons MP, Renauld-Mongénie G, Savarino SJ. Evaluation of the immunogenicity and protective efficacy of a recombinant CS6-based ETEC vaccine in an Aotus nancymaae CS6 + ETEC challenge model. Vaccine 2020; 39:487-494. [PMID: 33357957 DOI: 10.1016/j.vaccine.2020.12.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 11/30/2020] [Accepted: 12/09/2020] [Indexed: 10/22/2022]
Abstract
Colonization factors or Coli surface antigens (CFs or CS) are important virulence factors of Enterotoxigenic E. coli (ETEC) that mediate intestinal colonization and accordingly are targets of vaccine development efforts. CS6 is a highly prevalent CF associated with symptomatic ETEC infection both in endemic populations and amongst travelers. In this study, we used an Aotus nancymaae non-human primate ETEC challenge model with a CS6 + ETEC strain, B7A, to test the immunogenicity and protective efficacy (PE) of a recombinant CS6-based subunit vaccine. Specifically, we determined the ability of dscCssBA, the donor strand complemented recombinant stabilized fusion of the two subunits of the CS6 fimbriae, CssA and CssB, to elicit protection against CS6 + ETEC mediated diarrhea when given intradermally (ID) with the genetically attenuated double mutant heat-labile enterotoxin LT(R192G/L211A) (dmLT). ID vaccination with dscCssBA + dmLT induced strong serum antibody responses against CS6 and LT. Importantly, vaccination with dscCssBA + dmLT resulted in no observed diarrheal disease (PE = 100%, p = 0.03) following B7A challenge as compared to PBS immunized animals, with an attack rate of 62.5%. These data demonstrate the potential role that CS6 may play in ETEC infection and that recombinant dscCssBA antigen can provide protection against challenge with the homologous CS6 + ETEC strain, B7A, in the Aotus nancymaae diarrheal challenge model. Combined, these data indicate that CS6, and more specifically, a recombinant engineered derivative should be considered for further clinical development.
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Affiliation(s)
- A Ramakrishnan
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, 615 N Wolfe St, Baltimore, MD 21205, USA
| | - S S Joseph
- Henry M Jackson Foundation for the Advancement of Military Medicine, 6720 Rockledge Drive, Bethesda, MD 20817, USA
| | - N D Reynolds
- Department of Bacteriology, Naval Medical Research Unit No. 6, Venezuela Ave. Block 36, Bellavista, Callao, Peru
| | - D Poncet
- Sanofi Pasteur, Research and External Innovation, 1541 Av. Marcel Mérieux, 69280 Marcy L'Etoile
| | - M Maciel
- Henry M Jackson Foundation for the Advancement of Military Medicine, 6720 Rockledge Drive, Bethesda, MD 20817, USA
| | - G Nunez
- Department of Bacteriology, Naval Medical Research Unit No. 6, Venezuela Ave. Block 36, Bellavista, Callao, Peru
| | - N Espinoza
- Department of Bacteriology, Naval Medical Research Unit No. 6, Venezuela Ave. Block 36, Bellavista, Callao, Peru
| | - M Nieto
- Department of Bacteriology, Naval Medical Research Unit No. 6, Venezuela Ave. Block 36, Bellavista, Callao, Peru
| | - R Castillo
- Department of Bacteriology, Naval Medical Research Unit No. 6, Venezuela Ave. Block 36, Bellavista, Callao, Peru
| | - J M Royal
- Department of Veterinary Services, Naval Medical Research Unit No. 6, Venezuela Ave. Block 36, Bellavista, Callao, Peru
| | - S Poole
- Henry M Jackson Foundation for the Advancement of Military Medicine, 6720 Rockledge Drive, Bethesda, MD 20817, USA
| | - A McVeigh
- Henry M Jackson Foundation for the Advancement of Military Medicine, 6720 Rockledge Drive, Bethesda, MD 20817, USA
| | - J E Rollenhagen
- Henry M Jackson Foundation for the Advancement of Military Medicine, 6720 Rockledge Drive, Bethesda, MD 20817, USA
| | | | - M G Prouty
- Enteric Diseases Department, Naval Medical Research Center, 503 Robert Grant Ave, Silver Spring, MD 20910, USA.
| | - M P Simons
- Department of Bacteriology, Naval Medical Research Unit No. 6, Venezuela Ave. Block 36, Bellavista, Callao, Peru
| | - G Renauld-Mongénie
- Sanofi Pasteur, Research and External Innovation, 1541 Av. Marcel Mérieux, 69280 Marcy L'Etoile
| | - S J Savarino
- Enteric Diseases Department, Naval Medical Research Center, 503 Robert Grant Ave, Silver Spring, MD 20910, USA
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5
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Long J, Lanchon C, Rambeaud J, Fiard G, Franquet Q, Lefrancq J, Terrier N, Poncet D, Boillot B, Khogeer A, Overs C, Thuillier C, Descotes J. Urétérolyse coelioscopique robot-assistée pour fibrose rétro-péritonéale. Prog Urol 2020. [DOI: 10.1016/j.purol.2020.08.038] [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: 10/23/2022]
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Lanchon C, Paganelli L, Thuillier C, Rambeaud J, Fiard G, Franquet Q, Lefrancq J, Poncet D, Terrier N, Overs C, Boillot B, Descotes J, Long J. Ablation d’une prothèse de cystocèle voie basse ulcérée dans la vessie avec réimplantation urétéro-vésicale par voie coelioscopique robot-assistée. Prog Urol 2020. [DOI: 10.1016/j.purol.2020.08.042] [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: 11/17/2022]
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Garnier T, Descotes J, Long J, Thuillier C, Terrier N, Overs C, Poncet D, Lefrancq J, Franquet Q, Khogeer A, Fiard G. Risque hémorragique et estimation des pertes sanguines en chirurgie urologique. Prog Urol 2020. [DOI: 10.1016/j.purol.2020.07.194] [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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Fiard G, Poncet D, Blachier M, Peilleron N, Long J. Pyélotomie coelioscopique robot-assistée : une technique reproductible. Prog Urol 2020. [DOI: 10.1016/j.purol.2020.08.037] [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: 12/01/2022]
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Rossi J, Besson T, Poncet D, Millet GY, Morio CY.M. Intra- and inter- session reliability of a new method for evaluating toes flexor strength: preliminary study. Comput Methods Biomech Biomed Engin 2020. [DOI: 10.1080/10255842.2020.1815314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- J. Rossi
- Inter-University Laboratory of Human Movement Biology, University of Lyon, UJM-Saint-Etienne, Saint-Etienne, France
| | - T. Besson
- Inter-University Laboratory of Human Movement Biology, University of Lyon, UJM-Saint-Etienne, Saint-Etienne, France
| | - D. Poncet
- Inter-University Laboratory of Human Movement Biology, University of Lyon, UJM-Saint-Etienne, Saint-Etienne, France
| | - G. Y. Millet
- Inter-University Laboratory of Human Movement Biology, University of Lyon, UJM-Saint-Etienne, Saint-Etienne, France
| | - C. Y .M. Morio
- Movement Sciences Department, Decathlon SportsLab, Villeneuve d’Ascq, France
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Rossi J, Vitulli S, Poncet D, Edouard P, Largeron H, Sangnier S. Biomechanical analysis of different knee angle starting positions in nordic hamstring exercise: preliminary study. Comput Methods Biomech Biomed Engin 2020. [DOI: 10.1080/10255842.2020.1815315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- J. Rossi
- Univ Lyon, UJM-Saint-Etienne, Inter-university Laboratory of Human Movement Biology, Saint-Etienne, France
| | - S. Vitulli
- Department of research and innovation, Association Sportive Saint-Etienne (A.S.S.E), Saint-Etienne, France
| | - D. Poncet
- Univ Lyon, UJM-Saint-Etienne, Inter-university Laboratory of Human Movement Biology, Saint-Etienne, France
| | - P. Edouard
- Univ Lyon, UJM-Saint-Etienne, Inter-university Laboratory of Human Movement Biology, Saint-Etienne, France
- Department of Clinical and Exercise Physiology, Sports Medicine Unity, University Hospital of Saint-Etienne, Faculty of medicine, Saint-Etienne, France
| | - H. Largeron
- Department of research and innovation, Association Sportive Saint-Etienne (A.S.S.E), Saint-Etienne, France
| | - S. Sangnier
- Department of research and innovation, Association Sportive Saint-Etienne (A.S.S.E), Saint-Etienne, France
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Blachier M, Thuillier C, Long J, Poncet D, Descotes J, Fiard G. Suivi et sécurité des endoprothèses Allium. Prog Urol 2019. [DOI: 10.1016/j.purol.2019.08.181] [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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Franquet Q, Terrier N, Badet L, Matillon X, Rambeaud J, Crouzet S, Long J, Lanchon C, Poncet D, Jouve T, Noble J, Grisard S, Lefrancq J, Overs C, Thuillier C, Rostaing L, Descotes J, Fiard G. Prélèvement de rein pour transplantation a donneur vivant, suites opératoires et évolution des donneurs. Évaluation bicentrique des pratiques sur 425 cas. Prog Urol 2019. [DOI: 10.1016/j.purol.2019.08.194] [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: 11/16/2022]
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13
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Poncet D, Picart T, Guyotat J, Jouanneau E, Joubert B, Vasiljevic A, Honnorat J, Meyronet D, Ducray F, Barritault M. P14.88 Comparison of SNaPshot PCR and digital droplet PCR for the identification of TERT promoter in non-diagnostic biopsies from glioma patients. Neuro Oncol 2019. [DOI: 10.1093/neuonc/noz126.323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
BACKGROUND
We previously showed that TERT promotor (pTERT) mutations can be detected in a high proportion of non-diagnostic biopsies from glioma patients using SNaPshot PCR. The aim of the present study was to assess the diagnostic value of digital droplet PCR (ddPCR) in this setting.
MATERIAL AND METHODS
pTERT mutations were retrospectively assessed using SNaPshot PCR and ddPCR in the non-diagnostic biopsies of 14 adult patients who underwent an initial non-diagnostic needle biopsy that led to perform another biopsy that finally demonstrated a pTERT-mutant glioma.
RESULTS
Median age at diagnosis was 69 years and the median interval between the initial and final biopsy was 22 days. The initial biopsy consisted of unspecific infiltrating glial cells (n=10), hemorrhage, necrosis and/or fibrosis (n=4). Using SNaPshot PCR, the final biopsy found an IDH-WT pTERT-mutant glioma in 12 cases (glioblastoma n=12), an IDH-mutant pTERT-mutant oligodendroglioma in one case and an IDH-WT pTERT-WT glioblastoma in one case. Retrospectively, a pTERT mutation was identified by both ddPCR and SNaPshot in the non-diagnostic biopsies in 85% (11 /13) of pTERT mutant-gliomas. No mutation was detected in the non-diagnostic biopsies of IDH-WT pTERT-WT gliomas using either technique. Overall, a pTERT mutation were detected in 79% (11/14) of non-diagnostic biopsies.
CONCLUSION
Digital Droplet PCR, as SNaPshot PCR, enables the identification of pTERT mutations in a high rate of non-diagnostic biopsies from glioma patients. The sensitivity of both techniques seems similar in this setting.
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Affiliation(s)
- D Poncet
- Hospices Civils de Lyon, Lyon, France
| | - T Picart
- Hospices Civils de Lyon, Lyon, France
| | - J Guyotat
- Hospices Civils de Lyon, Lyon, France
| | | | - B Joubert
- Hospices Civils de Lyon, Lyon, France
| | | | | | | | - F Ducray
- Hospices Civils de Lyon, Lyon, France
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Picart T, Barritault M, Tabouret E, Idbaih A, Izquierdo Gracia C, Poncet D, Honnorat J, Meyronet D, Guyotat J, Ducray F. OS5.5 Characteristics of high-grade gliomas with H3 G34 mutation in adults. Neuro Oncol 2019. [DOI: 10.1093/neuonc/noz126.038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
BACKGROUND
H3 G34-mutant high-grade gliomas occur primarily in children but can also be encountered in adults. The aim of the present study was to describe the characteristics of H3 G34-mutant high-grade gliomas in adults.
MATERIAL AND METHODS
We analysed the characteristics of 17 adult H3 G34-mutant high-grade gliomas and compared them with those of adult grade IV gliomas with H3 K27M mutation (n=21), IDH mutation (n=42) and TERT promoter (pTERT) mutation (n=88).
RESULTS
Median age at diagnosis in H3 G34-mutant gliomas was 25 years (range: 19–33 y). All tumors had a hemispheric location. The radiological presentation was suggestive of a high-grade glioma in 6 patients but in 10 patients it initially suggested another diagnosis due to absent or faint contrast enhancement (n=9) or the presence of an initial intratumoral haemorrhage (n=1). In non- or faint contrast-enhancing cases, diffusion-weighted imaging (DWI) was more helpful to suspect an aggressive tumor than MR spectroscopy and perfusion MRI. All H3 G34-mutant gliomas were classified as IDH wildtype glioblastomas. PNET-like foci were observed in 8 cases and most cases were immunonegative for ATRX (92%) and Olig2 (81%) and demonstrated MGMT promoter methylation (82%). The clinical, radiological and histological presentation of H3 G34-mutant gliomas was different from that of midline H3 K27M-mutant diffuse gliomas and from that of IDH-mutant and IDH-wildtype pTERT-mutant glioblastomas. Median overall survival of G34-mutant gliomas was 23.9 months compared to 19.6 months (p=0.16), 13.7 months (p=0.45) and 58 months (p=2.3x10-10) in H3 K27M-mutant diffuse gliomas, IDHwt pTERT-mutant and IDH-mutant glioblastomas, respectively.
CONCLUSION
Adults H3 G34-mutant high-grade gliomas are associated with distinct characteristics and a poor prognosis. DWI seems helpful to identify cases that present as non-contrast enhancing lesions and can wrongly suggest another diagnosis in these young patients.
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Affiliation(s)
- T Picart
- Hospices Civils de Lyon, Bron, France
| | | | - E Tabouret
- AP-HM - Hôpital de la Timone, Marseille, France
| | - A Idbaih
- AP-HP Hôpitaux La Pitié-Salpêtrière-Charles-Foix, Paris, France
| | | | - D Poncet
- Hospices Civils de Lyon, Bron, France
| | | | | | - J Guyotat
- Hospices Civils de Lyon, Bron, France
| | - F Ducray
- Hospices Civils de Lyon, Bron, France
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Alard A, Marboeuf C, Fabre B, Jean C, Martineau Y, Lopez F, Vende P, Poncet D, Schneider RJ, Bousquet C, Pyronnet S. Differential Regulation of the Three Eukaryotic mRNA Translation Initiation Factor (eIF) 4Gs by the Proteasome. Front Genet 2019; 10:254. [PMID: 30984242 PMCID: PMC6449437 DOI: 10.3389/fgene.2019.00254] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 03/07/2019] [Indexed: 12/02/2022] Open
Abstract
The 4G family of eukaryotic mRNA translation initiation factors is composed of three members (eIF4GI, eIF4GII, and DAP5). Their specific roles in translation initiation are under intense investigations, but how their respective intracellular amounts are controlled remains poorly understood. Here we show that eIF4GI and eIF4GII exhibit much shorter half-lives than that of DAP5. Both eIF4GI and eIF4GII proteins, but not DAP5, contain computer-predicted PEST motifs in their N-termini conserved across the animal kingdom. They are both sensitive to degradation by the proteasome. Under normal conditions, eIF4GI and eIF4GII are protected from proteasomal destruction through binding to the detoxifying enzyme NQO1 [NAD(P)H:quinone oxidoreductase]. However, when cells are exposed to oxidative stress both eIF4GI and eIF4GII, but not DAP5, are degraded by the proteasome in an N-terminal-dependent manner, and cell viability is more compromised upon silencing of DAP5. These findings indicate that the three eIF4G proteins are differentially regulated by the proteasome and that persistent DAP5 plays a role in cell survival upon oxidative stress.
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Affiliation(s)
- Amandine Alard
- INSERM UMR1037, Centre de Recherche en Cancérologie de Toulouse, Equipe Labellisée Ligue Contre le Cancer and Laboratoire d'Excellence Toulouse Cancer, Université de Toulouse, Toulouse, France
| | - Catherine Marboeuf
- INSERM UMR1037, Centre de Recherche en Cancérologie de Toulouse, Equipe Labellisée Ligue Contre le Cancer and Laboratoire d'Excellence Toulouse Cancer, Université de Toulouse, Toulouse, France
| | - Bertrand Fabre
- INSERM UMR1037, Centre de Recherche en Cancérologie de Toulouse, Equipe Labellisée Ligue Contre le Cancer and Laboratoire d'Excellence Toulouse Cancer, Université de Toulouse, Toulouse, France
| | - Christine Jean
- INSERM UMR1037, Centre de Recherche en Cancérologie de Toulouse, Equipe Labellisée Ligue Contre le Cancer and Laboratoire d'Excellence Toulouse Cancer, Université de Toulouse, Toulouse, France
| | - Yvan Martineau
- INSERM UMR1037, Centre de Recherche en Cancérologie de Toulouse, Equipe Labellisée Ligue Contre le Cancer and Laboratoire d'Excellence Toulouse Cancer, Université de Toulouse, Toulouse, France
| | - Frédéric Lopez
- INSERM UMR1037, Centre de Recherche en Cancérologie de Toulouse, Equipe Labellisée Ligue Contre le Cancer and Laboratoire d'Excellence Toulouse Cancer, Université de Toulouse, Toulouse, France
| | - Patrice Vende
- UMR9198 CEA, Institut de Biologie Intégrative de la Cellule (I2BC), Centre National de la Recherche Scientifique, Université Paris-Sud, Gif-sur-Yvette, France
| | - Didier Poncet
- UMR9198 CEA, Institut de Biologie Intégrative de la Cellule (I2BC), Centre National de la Recherche Scientifique, Université Paris-Sud, Gif-sur-Yvette, France
| | | | - Corinne Bousquet
- INSERM UMR1037, Centre de Recherche en Cancérologie de Toulouse, Equipe Labellisée Ligue Contre le Cancer and Laboratoire d'Excellence Toulouse Cancer, Université de Toulouse, Toulouse, France
| | - Stéphane Pyronnet
- INSERM UMR1037, Centre de Recherche en Cancérologie de Toulouse, Equipe Labellisée Ligue Contre le Cancer and Laboratoire d'Excellence Toulouse Cancer, Université de Toulouse, Toulouse, France
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Franquet Q, Ourfali S, Fiard G, Poncet D, Lanchon C, Sarrazin C, Lefrancq J, Descotes J, Long JA. Réimplantation urétéro-vésicale droite avec remodelage du bas uretère par laparoscopie robot-assistée. Prog Urol 2018. [DOI: 10.1016/j.purol.2018.07.258] [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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17
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Lanchon C, Fiard G, Rambeaud J, Poncet D, Seizilles de Mazancourt E, Descotes J, Franquet Q, Long J. Néphrectomie partielle robot assistée en indication impérative pour volumineuse tumeur du rein multifocale et bilatérale. Prog Urol 2018. [DOI: 10.1016/j.purol.2018.07.251] [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: 11/16/2022]
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Izquierdo C, Barritault M, Poncet D, Cartalat S, Joubert B, Bruna J, Jouanneau E, Guyotat J, Vasiljevic A, Fenouil T, Berthezène Y, Honnorat J, Meyronet D, Ducray F. OS3.3 Radiological characteristics and natural history of adult IDH wild type astrocytomas with TERT promoter mutations. Neuro Oncol 2018. [DOI: 10.1093/neuonc/noy139.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
| | | | - D Poncet
- Hôpital Pierre Wertheimer, Lyon, France
| | | | - B Joubert
- Hôpital Pierre Wertheimer, Lyon, France
| | - J Bruna
- Hospital Universitari de Bellvitge-ICO L’Hospitalet-IDIBELL, Hospitalet Llobregat, Spain
| | | | - J Guyotat
- Hôpital Pierre Wertheimer, Lyon, France
| | | | - T Fenouil
- Hôpital Pierre Wertheimer, Lyon, France
| | | | | | | | - F Ducray
- Hôpital Pierre Wertheimer, Lyon, France
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Barritault M, Picart T, Poncet D, Fenouil T, Guyotat J, Jouanneau E, Joubert B, Vasiljevic A, Honnorat J, Meyronet D, Ducray F. P01.120 Importance of systematic TERT promoter and IDH mutations screening in non-diagnostic biopsies from patients with a suspected glioma. Neuro Oncol 2018. [DOI: 10.1093/neuonc/noy139.162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- M Barritault
- Hospices Civiles de Lyon, Lyon, France
- Cancer Research Centre of Lyon, INSERM U1052, CNRS UMR5286, Lyon, France
| | - T Picart
- Hospices Civiles de Lyon, Lyon, France
| | - D Poncet
- Hospices Civiles de Lyon, Lyon, France
| | - T Fenouil
- Hospices Civiles de Lyon, Lyon, France
| | - J Guyotat
- Hospices Civiles de Lyon, Lyon, France
| | | | - B Joubert
- Hospices Civiles de Lyon, Lyon, France
| | | | | | | | - F Ducray
- Hospices Civiles de Lyon, Lyon, France
- Université Claude Bernard Lyon 1, Lyon, France
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Lanchon C, Fiard G, Long JA, Arnoux V, Carnicelli D, Franquet Q, Poncet D, Bey E, Lefrancq JB, Grisard S, Peilleron N, Terrier N, Boillot B, Rambeaud JJ, Descotes JL, Thuillier C. Open prostatectomy versus 180-W XPS GreenLight laser vaporization: Long-term functional outcome for prostatic adenomas > 80 g. Prog Urol 2018; 28:180-187. [DOI: 10.1016/j.purol.2017.12.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 09/24/2017] [Accepted: 12/13/2017] [Indexed: 11/15/2022]
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21
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Franquet Q, Lefrancq J, Poncet D, Overs C, Descotes J, Thuillier C, Rambeaud J, Lanchon C, Long J. Approche multimodale d’un adénocarcinome de l’ourache localement avancé. Prog Urol 2017. [DOI: 10.1016/j.purol.2017.07.274] [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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Fiard G, Descotes J, Franquet Q, Poncet D, Rambeaud J, Long JA. Prédiction du score de Gleason par l’association biopsies randomisées + ciblées avec fusion échographie-IRM. Prog Urol 2017. [DOI: 10.1016/j.purol.2017.07.066] [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: 11/24/2022]
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23
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Long J, Rambeaud J, Fiard G, Boillot B, Pic G, Lee J, Lanchon C, Terrier N, Poncet D, Descotes J. Technique standardisée d’une néovessie robotisée intracorporelle selon Studer. Prog Urol 2017. [DOI: 10.1016/j.purol.2017.07.272] [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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24
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Lanchon C, Long J, Fiard G, Poncet D, Franquet Q, Lee J, Pic G, Rambeaud J, Descotes J. Néphrectomie partielle droite pour tumeur complexe. Clampage suprasélectif aidé par le vert d’indocyanine. Prog Urol 2017. [DOI: 10.1016/j.purol.2017.07.253] [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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25
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Lanchon C, Ronna M, Fiard G, Rambeaud J, Descotes J, Thuillier C, Terrier N, Boillot B, Arnoux V, Lee J, Carnicelli D, Poncet D, Overs C, Peilleron N, Franquet Q, Lefrancq J, Bey E, Grisard S, Long J. Alpha-bloquant adjuvant à la lithotritie extra-corporelle : un essai prospectif randomisé. Prog Urol 2016. [DOI: 10.1016/j.purol.2016.07.065] [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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26
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Poncet D, Boillot B, Descotes J, Thuillier C, Fiard G, Carnicelli D. Reprises chirurgicales nécessaires au maintien d’une dérivation urinaire cutanée de type Mitrofanoff : résultats à 5ans. Prog Urol 2016. [DOI: 10.1016/j.purol.2016.07.037] [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: 10/20/2022]
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27
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Overs C, Long J, Fiard G, Rambeaud J, Boillot B, Terrier N, Pic G, Lee J, Peilleron N, Carnicelli D, Poncet D, Franquet Q, Lanchon C, Lefrancq J, Descotes J. Traumatismes fermés du rein avec rupture de la voie excrétrice : existe-t-il encore des indications à une dérivation endoscopique ? Prog Urol 2016. [DOI: 10.1016/j.purol.2016.07.257] [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: 11/26/2022]
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28
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Lanchon C, Arnoux V, Fiard G, Poncet D, Carnicelli D, Overs C, Peilleron N, Franquet Q, Bey E, Lefranc J, Grisard S, Thuillier C, Pic G, Lee J, Rambeaud J, Descotes J, Long J. Néphrectomie partielle robot assisté avec clampage supra-sélectif aidé par le vert d’indocyanine versus déclampage précoce de l’artère rénale : résultats d’une cohorte prospective appariée. Prog Urol 2016. [DOI: 10.1016/j.purol.2016.07.022] [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: 11/24/2022]
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29
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Poncet D, Bocqueraz F, Moalic R, Mollier S, Michel A. Hypnoanalgésie pour la mise en place d’une bandelette sous-urétrale. Étude préliminaire : à propos de 8 patientes. Prog Urol 2016. [DOI: 10.1016/j.purol.2016.07.172] [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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Lefrancq J, Long J, Rambeaud J, Descotes J, Terrier N, Thuillier C, Boillot B, Fiard G, Lanchon C, Carnicelli D, Poncet D, Peilleron N, Overs C, Franquet Q, Lee J, Bey E, Pic G. Technique de cystectomie–Bricker pour vessie neurologique totalement intra-corporelle cœlioscopique robot-assistée. Prog Urol 2016. [DOI: 10.1016/j.purol.2016.09.006] [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: 11/27/2022]
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31
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Lanchon C, Fiard G, Poncet D, Carnicelli D, Overs C, Peilleron N, Franquet Q, Bey E, Pic G, Lee J, Rambeaud J, Descotes J, Long J. Les scores morphométriques RENAL et PADUA sont-ils encore prédictifs de difficulté chirurgicale à l’ère de la néphrectomie partielle robot-assistée ? Prog Urol 2016. [DOI: 10.1016/j.purol.2016.07.296] [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: 11/24/2022]
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32
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Gratia M, Vende P, Charpilienne A, Baron HC, Laroche C, Sarot E, Pyronnet S, Duarte M, Poncet D. Challenging the Roles of NSP3 and Untranslated Regions in Rotavirus mRNA Translation. PLoS One 2016; 11:e0145998. [PMID: 26727111 PMCID: PMC4699793 DOI: 10.1371/journal.pone.0145998] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Accepted: 12/01/2015] [Indexed: 12/20/2022] Open
Abstract
Rotavirus NSP3 is a translational surrogate of the PABP-poly(A) complex for rotavirus mRNAs. To further explore the effects of NSP3 and untranslated regions (UTRs) on rotavirus mRNAs translation, we used a quantitative in vivo assay with simultaneous cytoplasmic NSP3 expression (wild-type or deletion mutant) and electroporated rotavirus-like and standard synthetic mRNAs. This assay shows that the last four GACC nucleotides of viral mRNA are essential for efficient translation and that both the NSP3 eIF4G- and RNA-binding domains are required. We also show efficient translation of rotavirus-like mRNAs even with a 5’UTR as short as 5 nucleotides, while more than eleven nucleotides are required for the 3’UTR. Despite the weak requirement for a long 5’UTR, a good AUG environment remains a requirement for rotavirus mRNAs translation.
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Affiliation(s)
- Matthieu Gratia
- Institut de Biologie Integrative de la Cellule (I2BC), UMR 9198, Département de Virologie, USC INRA 1358, Gif sur Yvette, France
| | - Patrice Vende
- Institut de Biologie Integrative de la Cellule (I2BC), UMR 9198, Département de Virologie, USC INRA 1358, Gif sur Yvette, France
| | - Annie Charpilienne
- Institut de Biologie Integrative de la Cellule (I2BC), UMR 9198, Département de Virologie, USC INRA 1358, Gif sur Yvette, France
| | - Hilma Carolina Baron
- Institut de Biologie Integrative de la Cellule (I2BC), UMR 9198, Département de Virologie, USC INRA 1358, Gif sur Yvette, France
| | - Cécile Laroche
- Institut de Biologie Integrative de la Cellule (I2BC), UMR 9198, Département de Virologie, USC INRA 1358, Gif sur Yvette, France
| | - Emeline Sarot
- INSERM UMR-1037 - Université de Toulouse III-Paul Sabatier, Laboratoire d'Excellence Toulouse Cancer (TOUCAN), Equipe labellisée Ligue Contre le Cancer Toulouse, France
| | - Stéphane Pyronnet
- INSERM UMR-1037 - Université de Toulouse III-Paul Sabatier, Laboratoire d'Excellence Toulouse Cancer (TOUCAN), Equipe labellisée Ligue Contre le Cancer Toulouse, France
| | - Mariela Duarte
- Institut de Biologie Integrative de la Cellule (I2BC), UMR 9198, Département de Virologie, USC INRA 1358, Gif sur Yvette, France
- Université d’Evry Val d’Essonne, Département de Biologie, Evry, France
| | - Didier Poncet
- Institut de Biologie Integrative de la Cellule (I2BC), UMR 9198, Département de Virologie, USC INRA 1358, Gif sur Yvette, France
- * E-mail:
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Lanchon C, Fiard G, Arnoux V, Terrier N, Boillot B, Thuillier C, Poncet D, Carnicelli D, Peilleron N, Long J. Traumatismes rénaux de haut grade : qui opérer ? Facteurs prédictifs de chirurgie et résultats fonctionnels à long terme après traitement conservateur : étude prospective monocentrique. Prog Urol 2015; 25:774. [DOI: 10.1016/j.purol.2015.08.120] [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: 10/22/2022]
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Lanchon C, Arnoux V, Fiard G, Descotes J, Rambeaud J, Hostiou T, Poncet D, Bey E, Long J. Néphrectomie partielle laparoscopique robot assistée zéro ischémie aidée par fluorescence au vert d’indocyanine. Prog Urol 2015; 25:861. [DOI: 10.1016/j.purol.2015.08.294] [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: 10/22/2022]
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35
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Fiard G, Descotes J, Hohn N, Poncet D, Bey E, Arnoux V, Rambeaud J, Long J. Diagnostic du cancer de prostate par biopsies ciblées avec fusion échographie/IRM : peut-on se passer des biopsies randomisées ? Prog Urol 2015; 25:833. [DOI: 10.1016/j.purol.2015.08.232] [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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36
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Thiam F, Charpilienne A, Poncet D, Kohli E, Basset C. B subunits of cholera toxin and thermolabile enterotoxin of Escherichia coli have similar adjuvant effect as whole molecules on rotavirus 2/6-VLP specific antibody responses and induce a Th17-like response after intrarectal immunization. Microb Pathog 2015; 89:27-34. [PMID: 26318874 DOI: 10.1016/j.micpath.2015.08.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 07/28/2015] [Accepted: 08/24/2015] [Indexed: 01/04/2023]
Abstract
The purpose of this study was to evaluate the adjuvant effect of the B subunits of cholera toxin (CT) and the thermolabile enterotoxin of Escherichia coli (LT) by the intrarectal route of immunization and compare them to the whole molecules CT and LT-R192G, a non toxic mutant of LT, using 2/6-VLP as an antigen, in mice. All molecules induced similar antigen specific antibody titers in serum and feces, whereas different T cell profiles were observed. CTB and LTB, conversely to CT and LT-R192G, did not induce detectable production of IL-2 by antigen specific T cells. Moreover, CTB, conversely to LT-R192G, CT and LTB, did not induce antigen specific CD4+CD25+Foxp3- and Foxp3+ T cells, thus showing different effects between the B subunits themselves. However, all molecules induced an antigen specific Th17 response. In conclusion, B subunits are potent adjuvants on B cell responses by the intrarectal route. Although their impact on T cell responses are different, all molecules induce a 2/6-VLP-specific Th17 T cell response that may play a major role in helping B cell responses and thus in adjuvanticity and protection.
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Affiliation(s)
- Fatou Thiam
- Centre de Recherche Inserm UMR866 'Lipides, Nutrition, Cancer', Université de Bourgogne Franche-Comté, Dijon, France
| | - Annie Charpilienne
- Virologie Moléculaire et Structurale, UMR CNRS 2472 INRA 1157, Gif/Yvette, France
| | - Didier Poncet
- Virologie Moléculaire et Structurale, UMR CNRS 2472 INRA 1157, Gif/Yvette, France
| | - Evelyne Kohli
- Centre de Recherche Inserm UMR866 'Lipides, Nutrition, Cancer', Université de Bourgogne Franche-Comté, Dijon, France
| | - Christelle Basset
- Centre de Recherche Inserm UMR866 'Lipides, Nutrition, Cancer', Université de Bourgogne Franche-Comté, Dijon, France.
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Lanchon C, Long JA, Boudry G, Terrier N, Skowron O, Badet L, Descotes JL, Rambeaud JJ, Malvezzi P, Boillot B, Thuillier C, Arnoux V, Fiard G, Poncet D, Dorez D. [Renal transplantation using a Maastricht category III non-heartbeating donor: First French experience and review of the literature]. Prog Urol 2015; 25:576-82. [PMID: 26159053 DOI: 10.1016/j.purol.2015.06.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2015] [Revised: 05/31/2015] [Accepted: 06/12/2015] [Indexed: 10/23/2022]
Abstract
In 2015, Annecy Hospital was the first French hospital to perform non-heartbeating organ donation from a Maastricht category III donor (patient awaiting cardiac arrest after withdrawal of treatment). Non-heartbeating organ donation (NHBD), performed in France since 2006, had initially excluded this category, due to ethical questions concerning end of life and treatment withdrawal, as well as technical specificities linked to this procedure. Grenoble University Hospital and Edouard-Herriot Hospital in Lyon then performed the first kidney transplants, with satisfactory outcomes in both recipients. This article presents the details and results of this new experience, challenging both on a deontological and organizational level. Functional outcomes of kidney grafts from NHBD are now well known in the literature and confirm their benefit for patients, with similar results to those from heartbeating donors (HBD). International experiences concerning specifically Maastricht category III NHBD are encouraging and promising.
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Affiliation(s)
- C Lanchon
- Service d'urologie et de transplantation rénale, CHU de Grenoble, 1, boulevard de la Chantourne, 38043 Grenoble cedex 9, France.
| | - J-A Long
- Service d'urologie et de transplantation rénale, CHU de Grenoble, 1, boulevard de la Chantourne, 38043 Grenoble cedex 9, France
| | - G Boudry
- Service d'urologie, centre hospitalier Annecy-Genevois, 1, avenue de l'Hôpital, Metz-Tessy, BP 90074, 74374 Pringy cedex, France
| | - N Terrier
- Service d'urologie et de transplantation rénale, CHU de Grenoble, 1, boulevard de la Chantourne, 38043 Grenoble cedex 9, France
| | - O Skowron
- Service d'urologie, centre hospitalier Annecy-Genevois, 1, avenue de l'Hôpital, Metz-Tessy, BP 90074, 74374 Pringy cedex, France
| | - L Badet
- Service d'urologie, hôpital Édouard-Herriot, hospices civils de Lyon, 69437 Lyon cedex 03, France
| | - J-L Descotes
- Service d'urologie et de transplantation rénale, CHU de Grenoble, 1, boulevard de la Chantourne, 38043 Grenoble cedex 9, France
| | - J-J Rambeaud
- Service d'urologie et de transplantation rénale, CHU de Grenoble, 1, boulevard de la Chantourne, 38043 Grenoble cedex 9, France
| | - P Malvezzi
- Service de néphrologie, de dialyse et de transplantation, CHU de Grenoble, 38043 Grenoble cedex 9, France
| | - B Boillot
- Service d'urologie et de transplantation rénale, CHU de Grenoble, 1, boulevard de la Chantourne, 38043 Grenoble cedex 9, France
| | - C Thuillier
- Service d'urologie et de transplantation rénale, CHU de Grenoble, 1, boulevard de la Chantourne, 38043 Grenoble cedex 9, France
| | - V Arnoux
- Service d'urologie et de transplantation rénale, CHU de Grenoble, 1, boulevard de la Chantourne, 38043 Grenoble cedex 9, France
| | - G Fiard
- Service d'urologie et de transplantation rénale, CHU de Grenoble, 1, boulevard de la Chantourne, 38043 Grenoble cedex 9, France
| | - D Poncet
- Service d'urologie et de transplantation rénale, CHU de Grenoble, 1, boulevard de la Chantourne, 38043 Grenoble cedex 9, France
| | - D Dorez
- Service de réanimation, centre hospitalier Annecy-Genevois, 1, avenue de l'Hôpital, Metz-Tessy, BP 90074, 74374 Pringy cedex, France
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Karelse A, Van Tongel A, Verstraeten T, Poncet D, De Wilde LF. Rocking-horse phenomenon of the glenoid component: the importance of inclination. J Shoulder Elbow Surg 2015; 24:1142-8. [PMID: 25769904 DOI: 10.1016/j.jse.2014.12.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [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: 10/10/2014] [Revised: 12/01/2014] [Accepted: 12/06/2014] [Indexed: 02/01/2023]
Abstract
BACKGROUND Abnormal glenoid version positioning has been recognized as a cause of glenoid component failure caused by the rocking horse phenomenon. In contrast, the importance of the glenoid inclination has not been investigated. MATERIALS AND METHODS The computed tomography scans of 152 healthy shoulders were evaluated. A virtual glenoid component was positioned in 2 different planes: the maximum circular plane (MCP) and the inferior circle plane (ICP). The MCP was defined by the best fitting circle of the most superior point of the glenoid and 2 points at the lower glenoid rim. The ICP was defined by the best fitting circle on the rim of the inferior quadrants. The inclination of both planes was measured as the intersection with the scapular plane. We defined the force vector of the rotator force couple and calculated the magnitude of the shear force vector on a virtual glenoid component in both planes during glenohumeral abduction. RESULTS The inclination of the component positioned in the MCP averaged 95° (range, 84°-108°) and for the ICP averaged 111° (range, 94°-126°). A significant reduction in shear forces was calculated for the glenoid component in the ICP vs the MCP: 98% reduction in 60° of abduction to 49% reduction in 90° of abduction. CONCLUSION Shear forces are significantly higher when the glenoid component is positioned in the MCP compared with the ICP, and this is more pronounced in early abduction. Positioning the glenoid component in the inferior circle might reduce the risk of a rocking horse phenomenon.
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Affiliation(s)
- Anne Karelse
- Department of Orthopedic Surgery and Traumatology, Ghent University Hospital, Gent, Belgium.
| | - Alexander Van Tongel
- Department of Orthopedic Surgery and Traumatology, Ghent University Hospital, Gent, Belgium
| | - Tom Verstraeten
- Department of Radiology, Ghent University Hospital, Gent, Belgium
| | | | - Lieven F De Wilde
- Department of Orthopedic Surgery and Traumatology, Ghent University Hospital, Gent, Belgium
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Poncet D, Arnoux V, Descotes JL, Rambeaud JJ, Verry C, Terrier N, Boillot B, Dubreuil J, Lanchon C, Carnicelli D, Fiard G, Long JA. Récidive biochimique après traitement curatif d’un adénocarcinome prostatique localisé : intérêt de la TEP à la choline dans l’évaluation de la récidive locale. Prog Urol 2015; 25:325-30. [DOI: 10.1016/j.purol.2015.01.018] [Citation(s) in RCA: 2] [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] [Received: 09/16/2014] [Revised: 01/11/2015] [Accepted: 01/23/2015] [Indexed: 10/23/2022]
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Ferrandon S, Magné N, Battiston-Montagne P, Hau-Desbat NH, Diaz O, Beuve M, Constanzo J, Chargari C, Poncet D, Chautard E, Ardail D, Alphonse G, Rodriguez-Lafrasse C. Cellular and molecular portrait of eleven human glioblastoma cell lines under photon and carbon ion irradiation. Cancer Lett 2015; 360:10-6. [PMID: 25657111 DOI: 10.1016/j.canlet.2015.01.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 01/19/2015] [Accepted: 01/20/2015] [Indexed: 10/25/2022]
Abstract
This study aimed to examine the cellular and molecular long-term responses of glioblastomas to radiotherapy and hadrontherapy in order to better understand the biological effects of carbon beams in cancer treatment. Eleven human glioblastoma cell lines, displaying gradual radiosensitivity, were irradiated with photons or carbon ions. Independently of p53 or O(6)-methylguanine-DNA methyltransferase(1) status, all cell lines responded to irradiation by a G2/M phase arrest followed by the appearance of mitotic catastrophe, which was concluded by a ceramide-dependent-apoptotic cell death. Statistical analysis demonstrated that: (i) the SF2(2) and the D10(3) values for photon are correlated with that obtained in response to carbon ions; (ii) regardless of the p53, MGMT status, and radiosensitivity, the release of ceramide is associated with the induction of late apoptosis; and (iii) the appearance of polyploid cells after photon irradiation could predict the Relative Biological Efficiency(4) to carbon ions. This large collection of data should increase our knowledge in glioblastoma radiobiology in order to better understand, and to later individualize, appropriate radiotherapy treatment for patients who are good candidates.
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Affiliation(s)
- S Ferrandon
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France
| | - N Magné
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France; Départment de Radiothérapie, Institut de Cancérologie Lucien Neuwirth, 42271 St Priest-en-Jarez, France
| | - P Battiston-Montagne
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France
| | - N-H Hau-Desbat
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France
| | - O Diaz
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France
| | - M Beuve
- IPNL-LIRIS-CNRS-IN2P3, 69622 Villeurbanne, France
| | - J Constanzo
- IPNL-LIRIS-CNRS-IN2P3, 69622 Villeurbanne, France
| | - C Chargari
- Service de Radiothérapie, Hôpital du Val de Grâce, 75230 Paris, France
| | - D Poncet
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France; Hospices Civils de Lyon, Centre Hospitalier Lyon-Sud, 69495 Pierre-Bénite, France
| | - E Chautard
- Centre Jean Perrin, Laboratoire de Radio-Oncologie Expérimentale, Clermont Université, EA7283 CREaT, Université d'Auvergne, 63011 Clermont-Ferrand, France
| | - D Ardail
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France; Hospices Civils de Lyon, Centre Hospitalier Lyon-Sud, 69495 Pierre-Bénite, France
| | - G Alphonse
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France; Hospices Civils de Lyon, Centre Hospitalier Lyon-Sud, 69495 Pierre-Bénite, France
| | - C Rodriguez-Lafrasse
- Laboratoire de Radiobiologie Cellulaire et Moléculaire, EMR3738, Faculté Médecine Lyon-Sud, Université de Lyon, Université Lyon1, 69921 Oullins, France; Hospices Civils de Lyon, Centre Hospitalier Lyon-Sud, 69495 Pierre-Bénite, France.
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Peilleron N, Long J, Fiard G, Carnicelli D, Rambeaud J, Terrier N, Iriart C, Lanchon C, Boillot B, Thuillier C, Arnoux V, Overs C, Poncet D, Descotes J. Traumatismes fermés parenchymateux de grade V : néphrectomie différée après contrôle de l’hémostase par embolisation. Prog Urol 2014; 24:826. [DOI: 10.1016/j.purol.2014.08.096] [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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Poncet D, Arnoux V, Descotes J, Rambeaud J, Verry C, Bolla M, Terrier N, Boillot B, Thuillier C, Fiard G, Long J. Récidive biochimique après traitement curatif d’un adénocarcinome prostatique localisé : intérêt du PET-choline dans l’évaluation de la récidive locale. Prog Urol 2014; 24:819-20. [DOI: 10.1016/j.purol.2014.08.080] [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: 10/24/2022]
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43
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Tresset G, Decouche V, Bryche JF, Charpilienne A, Le Cœur C, Barbier C, Squires G, Zeghal M, Poncet D, Bressanelli S. Unusual self-assembly properties of Norovirus Newbury2 virus-like particles. Arch Biochem Biophys 2013; 537:144-52. [DOI: 10.1016/j.abb.2013.07.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Revised: 06/12/2013] [Accepted: 07/03/2013] [Indexed: 10/26/2022]
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Tresset G, Le Coeur C, Bryche JF, Tatou M, Zeghal M, Charpilienne A, Poncet D, Constantin D, Bressanelli S. Norovirus capsid proteins self-assemble through biphasic kinetics via long-lived stave-like intermediates. J Am Chem Soc 2013; 135:15373-81. [PMID: 23822934 DOI: 10.1021/ja403550f] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The self-assembly kinetics for a norovirus capsid protein were probed by time-resolved small-angle X-ray scattering and then analyzed by singular value decomposition and global fitting. Only three species contribute to the total scattering intensities: dimers, intermediates comprising some 11 dimers, and icosahedral T = 3 capsids made up of 90 dimers. Three-dimensional reconstructions of the intermediate robustly show a stave-like shape consistent with an arrangement of two pentameric units connected by an interstitial dimer. Upon triggering of self-assembly, the biphasic kinetics consist of a fast step in which dimers are assembled into intermediates, followed by a slow step in which intermediates interlock into capsids. This simple kinetic model reproduces experimental data with an excellent agreement over 6 decades in time and with nanometer resolution. The extracted form factors are robust against changes in experimental conditions. These findings challenge and complement currently accepted models for the assembly of norovirus capsids.
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Affiliation(s)
- Guillaume Tresset
- Laboratoire de Physique des Solides, Université Paris-Sud , CNRS, 91405 Orsay, France
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Vende P, Gratia M, Duarte MD, Charpilienne A, Saguy M, Poncet D. Identification of mutations in the genome of rotavirus SA11 temperature-sensitive mutants D, H, I and J by whole genome sequences analysis and assignment of tsI to gene 7 encoding NSP3. Virus Res 2013; 176:144-54. [PMID: 23796411 DOI: 10.1016/j.virusres.2013.05.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Revised: 05/22/2013] [Accepted: 05/27/2013] [Indexed: 11/17/2022]
Abstract
The complete coding sequences of the four unassigned temperature-sensitive (ts) Baylor prototype rotavirus mutants (SA11ts D, H, I and J) were sequenced by deep sequencing double-stranded RNA using RNA-seq. Non-silent mutations were assigned to a specific mutant by Sanger sequencing RT-PCR products from each mutant. Mutations that led to amino acid changes were found in all genes except for genes 1 (VP1), 10 (NSP4) and 11 (NSP5/6). Based on these sequence analyses and earlier genetic analyses, the ts mutations in gene 7, which encodes the protein NSP3, were assigned to ts mutant groups I and H, and confirmed by an in vitro RNA-binding assay with recombinant proteins. In addition, ts mutations in gene 6 were assigned to tsJ. The presence of non-conservative mutations in two genes of two mutants (genes 4 and 2 in tsD and genes 3 and 7 in tsH) underscores the necessity of sequencing the whole genome of each rotavirus ts mutant prototype.
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Affiliation(s)
- Patrice Vende
- Virologie Moléculaire et Structurale, CNRS UPR 3296, INRA USC 1358, IFR 115, Centre de Recherche de Gif, 1 Avenue de la Terrasse, 91198 Gif sur Yvette, France
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46
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Martin D, Charpilienne A, Parent A, Boussac A, D'Autreaux B, Poupon J, Poncet D. The rotavirus nonstructural protein NSP5 coordinates a [2Fe‐2S] iron‐sulfur cluster that modulates interaction to RNA. FASEB J 2012. [DOI: 10.1096/fj.12-217182] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Davy Martin
- Virologie Moléculaire et StructuraleUnité Propre de Recherche du Centre National de la Recherche Scientifique (UPR‐CNRS) 3296Unité Sous Contrat de l' Institut National de la Recherche Agronomique (USC‐INRA)Gif sur YvetteFrance
| | - Annie Charpilienne
- Virologie Moléculaire et StructuraleUnité Propre de Recherche du Centre National de la Recherche Scientifique (UPR‐CNRS) 3296Unité Sous Contrat de l' Institut National de la Recherche Agronomique (USC‐INRA)Gif sur YvetteFrance
| | - Aubérie Parent
- Institut de Chimie des Substances NaturellesUPR‐CNRS 2301Centre de Recherche de GifCNRSGif sur YvetteFrance
| | - Alain Boussac
- Institut de Biologie et de Technologies de Saclay (iBiTec‐S)Service de Bioénergétique, Biologie Structurale et Mécanismes (SB2SM)Unité Mixte de Recherche (UMR‐CNRS) 8221Commissariat à l'Énergie Atomique et aux Énergies Alternatives (CEA)‐SaclayGif sur YvetteFrance
| | - Benoit D'Autreaux
- Institut de Chimie des Substances NaturellesUPR‐CNRS 2301Centre de Recherche de GifCNRSGif sur YvetteFrance
| | - Joël Poupon
- Laboratoire de Toxicologie BiologiqueAssistance Publique–Hôpitaux de Paris (AP‐HP), Hôpital LariboisièreParisFrance
| | - Didier Poncet
- Virologie Moléculaire et StructuraleUnité Propre de Recherche du Centre National de la Recherche Scientifique (UPR‐CNRS) 3296Unité Sous Contrat de l' Institut National de la Recherche Agronomique (USC‐INRA)Gif sur YvetteFrance
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47
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Martin D, Ouldali M, Ménétrey J, Poncet D. Structural organisation of the rotavirus nonstructural protein NSP5. J Mol Biol 2011; 413:209-21. [PMID: 21864538 DOI: 10.1016/j.jmb.2011.08.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2011] [Revised: 08/01/2011] [Accepted: 08/04/2011] [Indexed: 10/17/2022]
Abstract
Rotavirus is one of the leading agents of gastroenteritis worldwide. During infection, viral factories (viroplasms) are formed. The rotavirus nonstructural proteins NSP5 and NSP2 are the major building blocks of viroplasms; however, NSP5 function and organisation remain elusive. In this report, we present a structural characterisation of NSP5. Multi-angle laser light scattering, sedimentation velocity and equilibrium sedimentation experiments demonstrate that recombinant full-length NSP5 forms a decamer in solution. Far-Western, pull-down and multi-angle laser light scattering experiments show that NSP5 has two oligomerisation regions. The first region, residues 103-146, is involved in NSP5 dimerisation, whereas the second region, residues 189-198, is responsible for NSP5 decamerisation. Circular dichroism analyses of full-length and truncated forms of NSP5 reveal that the decamerisation region is helical, whereas the dimerisation region involves β-sheets. From these circular dichroism experiments, we also show that the NSP5 protomers contain two α-helices, a disordered N-terminal half and a C-terminal half that is primarily composed of β-sheet folds. This extensive structural characterisation of NSP5 led us to propose a model for its quaternary organisation. Finally, co-expression of NSP5 fragments and NSP2 in uninfected cells shows that the NSP5 decamerisation region is required for viroplasm-like structure formation. However, in vitro, the NSP5 decamerisation region partially inhibits the NSP2-NSP5 interaction. Our NSP5 model suggests that steric hindrance prevents NSP2 from binding to all NSP5 protomers. Some protomers may thus be free to interact with other NSP5 binding partners, such as viral RNAs and the viral polymerase VP1, to perform functions other than viroplasm organisation.
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Affiliation(s)
- Davy Martin
- Virologie Moléculaire et Structurale, UPR-CNRS 3296, USC INRA, Centre de Recherche de Gif, CNRS, 91198 Gif sur Yvette, France.
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Abstract
BACKGROUND AND PURPOSE Despite good clinical results with the reverse total shoulder arthroplasty, inferior scapular notching remains a concern. We evaluated 6 different solutions to overcome the problem of scapular notching. METHODS An average and a "worst case scenario" shape in A-P view in a 2-D computer model of a scapula was created, using data from 200 "normal" scapulae, so that the position of the glenoid and humeral component could be changed as well as design features such as depth of the polyethylene insert, the size of glenosphere, the position of the center of rotation, and downward glenoid inclination. The model calculated the maximum adduction (notch angle) in the scapular plane when the cup of the humeral component was in conflict with the scapula. RESULTS A change in humeral neck shaft inclination from 155° to 145° gave a 10° gain in notch angle. A change in cup depth from 8 mm to 5 mm gave a gain of 12°. With no inferior prosthetic overhang, a lateralization of the center of rotation from 0 mm to 5 mm gained 16°. With an inferior overhang of only 1 mm, no effect of lateralizing the center of rotation was noted. Downward glenoid inclination of 0º to 10º gained 10°. A change in glenosphere radius from 18 mm to 21 mm gained 31° due to the inferior overhang created by the increase in glenosphere. A prosthetic overhang to the bone from 0 mm to 5 mm gained 39°. INTERPRETATION Of all 6 solutions tested, the prosthetic overhang created the biggest gain in notch angle and this should be considered when designing the reverse arthroplasty and defining optimal surgical technique.
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Affiliation(s)
- Lieven F de Wilde
- Department of Orthopaedic Surgery and Traumatology, Ghent University Hospital, Ghent, Belgium
| | - Didier Poncet
- Department of Orthopaedic Surgery and Traumatology, Ghent University Hospital, Ghent, Belgium
| | - Bart Middernacht
- Department of Orthopaedic Surgery and Traumatology, Ghent University Hospital, Ghent, Belgium
| | - Anders Ekelund
- Department of Orthopaedic Surgery and Traumatology, Ghent University Hospital, Ghent, Belgium
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Di Niro R, Mesin L, Raki M, Zheng NY, Lund-Johansen F, Lundin KEA, Charpilienne A, Poncet D, Wilson PC, Sollid LM. Rapid generation of rotavirus-specific human monoclonal antibodies from small-intestinal mucosa. J Immunol 2010; 185:5377-83. [PMID: 20935207 DOI: 10.4049/jimmunol.1001587] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The gut mucosal surface is efficiently protected by Abs, and this site represents one of the richest compartments of Ab-secreting cells in the body. A simple and effective method to generate Ag-specific human monoclonal Abs (hmAbs) from such cells is lacking. In this paper, we describe a method to generate hmAbs from single Ag-specific IgA- or IgM-secreting cells of the intestinal mucosa. We found that CD138-positive plasma cells from the duodenum expressed surface IgA or IgM. Using eGFP-labeled virus-like particles, we harnessed the surface Ig expression to detect rotavirus-specific plasma cells at low frequency (0.03-0.35%) in 9 of 10 adult subjects. Single cells were isolated by FACS, and as they were viable, further testing of secreted Abs by ELISPOT and ELISA indicated a highly specific selection procedure. Ab genes from single cells of three donors were cloned, sequenced, and expressed as recombinant hmAbs. Of 26 cloned H chain Ab genes, 22 were IgA and 4 were IgM. The genes were highly mutated, and there was an overrepresentation of the VH4 family. Of 10 expressed hmAbs, 8 were rotavirus-reactive (6 with K(d) < 1 × 10(-10)). Importantly, our method allows generation of hmAbs from cells implicated in the protection of mucosal surfaces, and it can potentially be used in passive vaccination efforts and for discovery of epitopes directly relevant to human immunity.
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Affiliation(s)
- Roberto Di Niro
- Center for Immune Regulation, Oslo University Hospital, Oslo, Norway.
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50
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Thiam F, Martino CD, Bon F, Charpilienne A, Cachia C, Poncet D, Clements JD, Basset C, Kohli E. Unexpected modulation of recall B and T cell responses after immunization with rotavirus-like particles in the presence of LT-R192G. Toxins (Basel) 2010; 2:2007-27. [PMID: 22069670 PMCID: PMC3153289 DOI: 10.3390/toxins2082007] [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] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2010] [Accepted: 08/03/2010] [Indexed: 12/23/2022] Open
Abstract
LT-R192G, a mutant of the thermolabile enterotoxin of E. coli, is a potent adjuvant of immunization. Immune responses are generally analyzed at the end of protocols including at least 2 administrations, but rarely after a prime. To investigate this point, we compared B and T cell responses in mice after one and two intrarectal immunizations with 2/6 rotavirus-like particles (2/6-VLP) and LT-R192G. After a boost, we found, an unexpected lower B cell expansion measured by flow cytometry, despite a secondary antibody response. We then analyzed CD4(+)CD25(+)Foxp3(+) regulatory T cells (Tregs) and CD4(+)CD25(+)Foxp3(-) helper T cells after in vitro (re)stimulation of mesenteric lymph node cells with the antigen (2/6-VLP), the adjuvant (LT-R192G) or both. 2/6-VLP did not activate CD4(+)CD25(+)Foxp3(-) nor Foxp3(+) T cells from non-immunized and 2/6-VLP immunized mice, whereas they did activate both subsets from mice immunized with 2/6-VLP in the presence of adjuvant. LT-R192G dramatically decreased CD4(+)CD25(+)Foxp3(+) T cells from non-immunized and 2/6-VLP immunized mice but not from mice immunized with 2/6-VLP and adjuvant. Moreover, in this case, LT-R192G increased Foxp3 expression on CD4(+)CD25(+)Foxp3(+) cells, suggesting specific Treg activation during the recall. Finally, when both 2/6-VLP and LT-R192G were used for restimulation, LT-R192G clearly suppressed both 2/6-VLP-specific CD4(+)CD25(+)Foxp3(-) and Foxp3(+) T cells. All together, these results suggest that LT-R192G exerts different effects on CD4(+)CD25(+)Foxp3(+) T cells, depending on a first or a second contact. The unexpected immunomodulation observed during the recall should be considered in designing vaccination protocols.
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Affiliation(s)
- Fatou Thiam
- Laboratoire des Interactions Muqueuses-Agents transmissibles (LIMA), UPR562, UFRs Médecine et Pharmacie, IFR Santé-STIC, Université de Bourgogne, Dijon, France; (F.T.); (C.D.M.); (F.B.); (C.C.); (E.K.)
| | - Cyrille Di Martino
- Laboratoire des Interactions Muqueuses-Agents transmissibles (LIMA), UPR562, UFRs Médecine et Pharmacie, IFR Santé-STIC, Université de Bourgogne, Dijon, France; (F.T.); (C.D.M.); (F.B.); (C.C.); (E.K.)
| | - Fabienne Bon
- Laboratoire des Interactions Muqueuses-Agents transmissibles (LIMA), UPR562, UFRs Médecine et Pharmacie, IFR Santé-STIC, Université de Bourgogne, Dijon, France; (F.T.); (C.D.M.); (F.B.); (C.C.); (E.K.)
| | - Annie Charpilienne
- Virologie Moléculaire et Structurale, UMR CNRS 2472 INRA 1157, Gif/Yvette, France; (A.C.); (D.P.)
| | - Claire Cachia
- Laboratoire des Interactions Muqueuses-Agents transmissibles (LIMA), UPR562, UFRs Médecine et Pharmacie, IFR Santé-STIC, Université de Bourgogne, Dijon, France; (F.T.); (C.D.M.); (F.B.); (C.C.); (E.K.)
| | - Didier Poncet
- Virologie Moléculaire et Structurale, UMR CNRS 2472 INRA 1157, Gif/Yvette, France; (A.C.); (D.P.)
| | - John D. Clements
- Department of Microbiology and Immunology, Tulane University Health Sciences Center, New Orleans, LA 70112, USA; (J.D.C.)
| | - Christelle Basset
- Laboratoire des Interactions Muqueuses-Agents transmissibles (LIMA), UPR562, UFRs Médecine et Pharmacie, IFR Santé-STIC, Université de Bourgogne, Dijon, France; (F.T.); (C.D.M.); (F.B.); (C.C.); (E.K.)
| | - Evelyne Kohli
- Laboratoire des Interactions Muqueuses-Agents transmissibles (LIMA), UPR562, UFRs Médecine et Pharmacie, IFR Santé-STIC, Université de Bourgogne, Dijon, France; (F.T.); (C.D.M.); (F.B.); (C.C.); (E.K.)
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