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Noël N, Martinez A, Massicot F, Vasse JL, Behr JB. Kinetics of Strain-Promoted Alkyne-Nitrone Cycloadditions (SPANC) with Unprotected Carbohydrate Scaffolded Nitrones. Org Lett 2024; 26:3917-3922. [PMID: 38690807 DOI: 10.1021/acs.orglett.4c01098] [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: 05/03/2024]
Abstract
The use of unprotected carbohydrate-derived nitrones as partners in strain-promoted alkyne-nitrone cycloadditions was investigated as a new tool for bioconjugation. The observed second-order reactions displayed rate constants of 3.4 × 10-4-5.8 × 10-2 M-1 s-1, which is the common order of magnitude of reaction kinetics with other simple aliphatic or aromatic nitrones. Applicability of this method to aqueous media was demonstrated by performing a one-pot protocol, which combines sequential formation of the nitrone and cycloaddition with cyclooctyne in water.
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Affiliation(s)
- Nathan Noël
- Université de Reims Champagne-Ardenne, CNRS UMR 7312, ICMR, 51687 Reims, France
| | - Agathe Martinez
- Université de Reims Champagne-Ardenne, CNRS UMR 7312, ICMR, 51687 Reims, France
| | - Fabien Massicot
- Université de Reims Champagne-Ardenne, CNRS UMR 7312, ICMR, 51687 Reims, France
| | - Jean-Luc Vasse
- Université de Reims Champagne-Ardenne, CNRS UMR 7312, ICMR, 51687 Reims, France
| | - Jean-Bernard Behr
- Université de Reims Champagne-Ardenne, CNRS UMR 7312, ICMR, 51687 Reims, France
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Noël N, Duchateau S, Messire G, Massicot F, Vasse JL, Villaume S, Aziz A, Dorey S, Crouzet J, Behr JB. Protecting-group free synthesis of glycoconjugates displaying dual fungicidal and plant defense-eliciting activities. Bioorg Chem 2023; 141:106829. [PMID: 37690319 DOI: 10.1016/j.bioorg.2023.106829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 08/24/2023] [Accepted: 08/30/2023] [Indexed: 09/12/2023]
Abstract
A straightforward synthesis of carbohydrate templated isoxazolidines is described, by reaction of unprotected glycosylhydroxylamines (operating as 1,3-dipoles) with methyl acrylate using microwave activation. Rhamno- and erythro-isoxazolidines are recognized by plant cells, resulting in a strong ROS-production as a plant immune response, and exert a high antifungal activity against Botrytis cinerea.
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Affiliation(s)
- Nathan Noël
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, 51687 Reims, France
| | - Simon Duchateau
- Université de Reims Champagne Ardenne, RIBP-USC INRAE 1488, 51100 Reims, France
| | - Gatien Messire
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, 51687 Reims, France
| | - Fabien Massicot
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, 51687 Reims, France
| | - Jean-Luc Vasse
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, 51687 Reims, France
| | - Sandra Villaume
- Université de Reims Champagne Ardenne, RIBP-USC INRAE 1488, 51100 Reims, France
| | - Aziz Aziz
- Université de Reims Champagne Ardenne, RIBP-USC INRAE 1488, 51100 Reims, France
| | - Stéphan Dorey
- Université de Reims Champagne Ardenne, RIBP-USC INRAE 1488, 51100 Reims, France
| | - Jérôme Crouzet
- Université de Reims Champagne Ardenne, RIBP-USC INRAE 1488, 51100 Reims, France.
| | - Jean-Bernard Behr
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, 51687 Reims, France.
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Gueiderikh A, Ung M, Lazarovici J, Danu A, Ghez D, Saleh K, Dragani M, Noël N, Bigenwald C, Willekens C, Ribrag V, Michot JM, Martin V. Incidence, characteristics, management and outcome of patients with follicular lymphoma with tumor epidural compression, a study on 22 cases. Cancer Radiother 2023; 27:370-375. [PMID: 37156711 DOI: 10.1016/j.canrad.2023.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 03/30/2023] [Accepted: 04/15/2023] [Indexed: 05/10/2023]
Abstract
PURPOSE Follicular lymphoma (FL) is one of the most common lymphoma. Occasionally, FL is associated with tumoral epidural compression and management of these patients remain poorly codified. This study aims to report incidence, clinical characteristics, management and outcomes of patients with FL and tumoral epidural compression. MATERIAL AND METHODS Observational, retrospective cohort study of adult patients with FL and epidural tumor compression, treated in a French Institute over the last 20 years (2000-2021). RESULTS Between 2000 and 2021, 1382 patients with FL were followed by the haematological department. Of them, 22 (1.6%) patients (16 men and 6 women) had follicular lymphoma with epidural tumor compression. At epidural tumor compression occurrence, 8/22 (36%) patients had a neurological clinical deficit (motor, sensory or sphincter function) and 14/22 (64%) had tumor pain. All patients were treated with immuno-chemotherapy; the main regimen being used was R-CHOP plus high dose IV methotrexate in 16/22 (73%) patients. Radiotherapy for tumor epidural compression was performed in 19/22 (86%) patients. With a median follow-up of 60 months (range=[1-216]), 5 year local tumor relapse free survival was achieved in 65% (95% CI 47-90%) of patients. The median PFS was of 36 months (95% CI 24-NA) and 5 years OS estimate was 79% (95% CI 62-100%). Two patients developed a relapse at a second epidural site. CONCLUSION FL with tumoral epidural compression reached 1.6% of all FL patients. Management based on immuno-chemotherapy with radiotherapy appeared to produce comparable outcomes with the general FL population.
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Affiliation(s)
- A Gueiderikh
- Radiation therapy department, Gustave-Roussy, 114, rue Édouard-Vaillant, 94800 Villejuif, France.
| | - M Ung
- Radiation therapy department, Gustave-Roussy, 114, rue Édouard-Vaillant, 94800 Villejuif, France
| | - J Lazarovici
- Hematology department, Gustave-Roussy, 114, rue Édouard-Vaillant, 94800 Villejuif, France
| | - A Danu
- Hematology department, Gustave-Roussy, 114, rue Édouard-Vaillant, 94800 Villejuif, France
| | - D Ghez
- Hematology department, Gustave-Roussy, 114, rue Édouard-Vaillant, 94800 Villejuif, France
| | - K Saleh
- Hematology department, Gustave-Roussy, 114, rue Édouard-Vaillant, 94800 Villejuif, France
| | - M Dragani
- Hematology department, Gustave-Roussy, 114, rue Édouard-Vaillant, 94800 Villejuif, France
| | - N Noël
- Internal medicine department, hôpital Bicêtre, AP-HP, 78, rue du Général-Leclerc, 94270 Le Kremlin-Bicêtre, France
| | - C Bigenwald
- Hematology department, Gustave-Roussy, 114, rue Édouard-Vaillant, 94800 Villejuif, France
| | - C Willekens
- Hematology department, Gustave-Roussy, 114, rue Édouard-Vaillant, 94800 Villejuif, France
| | - V Ribrag
- Hematology department, Gustave-Roussy, 114, rue Édouard-Vaillant, 94800 Villejuif, France
| | - J-M Michot
- Hematology department, Gustave-Roussy, 114, rue Édouard-Vaillant, 94800 Villejuif, France
| | - V Martin
- Radiation therapy department, Gustave-Roussy, 114, rue Édouard-Vaillant, 94800 Villejuif, France
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Behr JB, Noël N, Messire G, Massicot F, Vasse JL. High-pressure activation to circumvent product degradation in the reaction of unprotected glyconitrones with alkynes. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1975-5291] [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: 11/11/2022]
Abstract
Cycloadditions of nitrones with alkynes usually occur best under heat activation. Due to the instability of the formed isoxazolines, alternative activation methods must be found. Here, hyperbaric conditions were used to transform nitrones generated from unprotected carbohydrates into the corresponding polyhydroxy-isoxazolines at room temperature. The reaction proved completely regioselective in favour of the 5-substituted 4-isoxazoline and the products were obtained in good yields as mixtures of the two possible diastereoisomers. Further transformations into biologically valuable targets are described. The whole synthesis constitutes a very straightforward procedure for the transformation of aldoses, highly compatible with the principles of green chemistry.
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Affiliation(s)
- Jean-Bernard Behr
- Institut de Chimie Moléculaire de Reims, Université de Reims Champagne-Ardenne, REIMS, France
| | - Nathan Noël
- Institut de Chimie Moléculaire de Reims, Université de Reims Champagne-Ardenne, REIMS, France
| | - Gatien Messire
- Institut de Chimie Moléculaire de Reims, Université de Reims Champagne-Ardenne, REIMS, France
| | - Fabien Massicot
- Institut de Chimie Moléculaire de Reims, Université de Reims Champagne-Ardenne, REIMS, France
| | - Jean-Luc Vasse
- Institut de Chimie Moléculaire de Reims, Université de Reims Champagne-Ardenne, REIMS, France
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Jutant E, Meyrignac O, Beurnier A, Jais X, Pham T, Morin L, Boucly A, Bulifon S, Samy F, Harrois A, Jevnikar M, Noël N, Pichon J, Roche A, Seferian A, Soliman S, Duranteau J, Becquemont L, Monnet X, Sitbon O, Bellin M, Humbert M, Savale L, Montani D. Symptômes respiratoires et anomalies radiologiques dans le COVID long. Revue des Maladies Respiratoires Actualités 2022. [PMCID: PMC8709679 DOI: 10.1016/j.rmra.2021.11.203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Fargeot G, Périllaud-Dubois C, Deback C, Noël N, Adam C, Cauquil C, Echaniz-Laguna A. Parvovirus B19-related peripheral nerve necrotizing vasculitis following SARS-CoV-2 infection. Rev Neurol (Paris) 2021; 178:158-160. [PMID: 34384627 PMCID: PMC8350790 DOI: 10.1016/j.neurol.2021.07.013] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 07/20/2021] [Indexed: 11/28/2022]
Affiliation(s)
- G Fargeot
- Neurology Department, AP-HP, CHU de Bicêtre, 78, rue du Général Leclerc, 94276 Le Kremlin-Bicêtre, France.
| | - C Périllaud-Dubois
- Virology Laboratory, AP-HP, Hôpitaux Universitaires Paris Saclay, Hôpital Paul Brousse, Villejuif, France
| | - C Deback
- Virology Laboratory, AP-HP, Hôpitaux Universitaires Paris Saclay, Hôpital Paul Brousse, Villejuif, France; Paris-Saclay University, Inserm, Inflammation, Microbiome and Immunosurveillance, Clamart, France; Paris Saclay University, Faculté de Médecine, Le Kremlin Bicêtre, France
| | - N Noël
- Paris Saclay University, Faculté de Médecine, Le Kremlin Bicêtre, France; AP-HP, Department of internal medicine and clinical immunology, Paris Saclay Hospital Group, Le Kremlin Bicêtre, France
| | - C Adam
- Department of Pathology, AP-HP, CHU de Bicêtre, Le Kremlin-Bicêtre, 94276, France
| | - C Cauquil
- Neurology Department, AP-HP, CHU de Bicêtre, 78, rue du Général Leclerc, 94276 Le Kremlin-Bicêtre, France; French National Reference Center for Rare Neuropathies (NNERF), 94276 Le Kremlin-Bicêtre, France
| | - A Echaniz-Laguna
- Neurology Department, AP-HP, CHU de Bicêtre, 78, rue du Général Leclerc, 94276 Le Kremlin-Bicêtre, France; Paris Saclay University, Faculté de Médecine, Le Kremlin Bicêtre, France; French National Reference Center for Rare Neuropathies (NNERF), 94276 Le Kremlin-Bicêtre, France; INSERM U1195, Paris-Saclay University, 94276 Le Kremlin-Bicêtre, France
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Pacoureau L, Labeyrie C, Catalan P, Echaniz-Laguna A, Henriquez S, Laparra A, Cauquil C, Chrétien P, Hacein-Bey-Abina S, Goujard C, Adam C, Lambotte O, Adams D, Noël N. Neuropathies périphériques associées aux syndromes lymphoprolifératifs : spectre clinique et démarche diagnostique. Rev Med Interne 2021; 42:844-854. [PMID: 34373143 DOI: 10.1016/j.revmed.2021.06.013] [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: 01/26/2021] [Revised: 06/17/2021] [Accepted: 06/20/2021] [Indexed: 10/20/2022]
Abstract
Lymphoproliferative syndromes (multiple myeloma, Waldenström's disease, chronic lymphocytic leukemia, lymphomas) may be associated with peripheral neuropathies. The mechanism can be dysimmune, associated or not with monoclonal gammopathies; paraneoplastic; infiltrative; or more commonly, iatrogenic or due to vitamin deficiency. The diagnosis can be complex, especially when the neuropathy is the presenting manifestation, requiring a close cooperation between internists and neurologists. The positive diagnosis of the neuropathy is based on a systematic electro-clinical investigation, which specifies the topography and the mechanism of the nerve damage, sometimes reinforced by imaging examinations, in particular, nerve and/or plexus MRI. The imputability of the neuropathy to a lymphoproliferative syndrome is based on a set of arguments including the clinical context (B signs, tumour syndrome), first-line laboratory tests (hemogram, protein electrophoresis, viral serologies, complement), auto-antibodies discussed according to the neuropathy (anti-MAG, anti-gangliosides) and sometimes more invasive examinations (bone marrow or neuro-muscular biopsies).
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Affiliation(s)
- L Pacoureau
- Service de médecine interne et immunologie clinique, Assistance publique-Hôpitaux Paris Saclay, Hôpital Bicêtre, 94275 Le Kremlin-Bicêtre cedex, France
| | - C Labeyrie
- Service de neurologie, Assistance publique-Hôpitaux de Paris, Groupe hospitalier universitaire Paris Sud, Hôpital Bicêtre, 94275 Le Kremlin-Bicêtre cedex, France; Centre de référence neuropathies amyloïdes familiales et autres neuropathies rares (NNERF), Groupe hospitalier universitaire Paris Sud, Hôpital Bicêtre, 94275 Le Kremlin-Bicêtre cedex, France
| | - P Catalan
- Service de médecine interne et immunologie clinique, Assistance publique-Hôpitaux Paris Saclay, Hôpital Bicêtre, 94275 Le Kremlin-Bicêtre cedex, France; Université Paris Saclay, Faculté de médecine, Le Kremlin Bicêtre, France
| | - A Echaniz-Laguna
- Université Paris Saclay, Faculté de médecine, Le Kremlin Bicêtre, France; Service de neurologie, Assistance publique-Hôpitaux de Paris, Groupe hospitalier universitaire Paris Sud, Hôpital Bicêtre, 94275 Le Kremlin-Bicêtre cedex, France; Centre de référence neuropathies amyloïdes familiales et autres neuropathies rares (NNERF), Groupe hospitalier universitaire Paris Sud, Hôpital Bicêtre, 94275 Le Kremlin-Bicêtre cedex, France
| | - S Henriquez
- Service de médecine interne et immunologie clinique, Assistance publique-Hôpitaux Paris Saclay, Hôpital Bicêtre, 94275 Le Kremlin-Bicêtre cedex, France; Université Paris Saclay, Faculté de médecine, Le Kremlin Bicêtre, France
| | - A Laparra
- Service de médecine interne et immunologie clinique, Assistance publique-Hôpitaux Paris Saclay, Hôpital Bicêtre, 94275 Le Kremlin-Bicêtre cedex, France; Université Paris Saclay, Faculté de médecine, Le Kremlin Bicêtre, France
| | - C Cauquil
- Service de neurologie, Assistance publique-Hôpitaux de Paris, Groupe hospitalier universitaire Paris Sud, Hôpital Bicêtre, 94275 Le Kremlin-Bicêtre cedex, France; Centre de référence neuropathies amyloïdes familiales et autres neuropathies rares (NNERF), Groupe hospitalier universitaire Paris Sud, Hôpital Bicêtre, 94275 Le Kremlin-Bicêtre cedex, France
| | - P Chrétien
- INSERM, UTCBS, Unité des technologies chimiques et biologiques pour la Santé, Université de Paris, CNRS, 75006 Paris, France; Service d'immunologie biologique, Assistance publique-Hôpitaux de Paris, Groupe hospitalier universitaire Paris Sud, Hôpital Bicêtre, 94275 Le Kremlin-Bicêtre cedex, France
| | - S Hacein-Bey-Abina
- INSERM, UTCBS, Unité des technologies chimiques et biologiques pour la Santé, Université de Paris, CNRS, 75006 Paris, France; Service d'immunologie biologique, Assistance publique-Hôpitaux de Paris, Groupe hospitalier universitaire Paris Sud, Hôpital Bicêtre, 94275 Le Kremlin-Bicêtre cedex, France
| | - C Goujard
- Service de médecine interne et immunologie clinique, Assistance publique-Hôpitaux Paris Saclay, Hôpital Bicêtre, 94275 Le Kremlin-Bicêtre cedex, France; Université Paris Saclay, Faculté de médecine, Le Kremlin Bicêtre, France
| | - C Adam
- Service d'anatomie pathologique et neuropathologie, Assistance publique-Hôpitaux de Paris, Groupe Hospitalier Universitaire Paris Sud, Hôpital Bicêtre, 94275 Le Kremlin-Bicêtre cedex, France
| | - O Lambotte
- Service de médecine interne et immunologie clinique, Assistance publique-Hôpitaux Paris Saclay, Hôpital Bicêtre, 94275 Le Kremlin-Bicêtre cedex, France; Université Paris Saclay, Faculté de médecine, Le Kremlin Bicêtre, France; Inserm UMR 1184, Immunologie des maladies virales et auto-immunes (IMVA), Université Paris Saclay, 94275 Le Kremlin-Bicêtre cedex, France; CEA, DSV/iMETI, Division of Immuno-Virology, IDMIT, Université Paris Saclay, 94275 Le Kremlin-Bicêtre cedex, France
| | - D Adams
- Université Paris Saclay, Faculté de médecine, Le Kremlin Bicêtre, France; Service de neurologie, Assistance publique-Hôpitaux de Paris, Groupe hospitalier universitaire Paris Sud, Hôpital Bicêtre, 94275 Le Kremlin-Bicêtre cedex, France; Centre de référence neuropathies amyloïdes familiales et autres neuropathies rares (NNERF), Groupe hospitalier universitaire Paris Sud, Hôpital Bicêtre, 94275 Le Kremlin-Bicêtre cedex, France
| | - N Noël
- Service de médecine interne et immunologie clinique, Assistance publique-Hôpitaux Paris Saclay, Hôpital Bicêtre, 94275 Le Kremlin-Bicêtre cedex, France; Université Paris Saclay, Faculté de médecine, Le Kremlin Bicêtre, France; Inserm UMR 1184, Immunologie des maladies virales et auto-immunes (IMVA), Université Paris Saclay, 94275 Le Kremlin-Bicêtre cedex, France; CEA, DSV/iMETI, Division of Immuno-Virology, IDMIT, Université Paris Saclay, 94275 Le Kremlin-Bicêtre cedex, France.
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Lerolle N, Noël N, Lécuroux C, Goujard C, Boufassa F, Lambotte O. COL09-05: Fréquence et facteurs de risque d’échappement chez les patients « HIV controllers ». Med Mal Infect 2014. [DOI: 10.1016/s0399-077x(14)70083-6] [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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Noël N, Lerolle N, Lécuroux C, Goujard C, Venet A, Boufassa F, Lambotte O. Risque de progression immunologique et/ou virologique chez les patients « HIV controllers » : analyse des facteurs cliniques et immunologiques (cohorte ANRS C021 CODEX). Rev Med Interne 2014. [DOI: 10.1016/j.revmed.2014.03.059] [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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Noël N, Maigné G, Tertian G, Anguel N, Monnet X, Michot JM, Goujard C, Lambotte O. Hemolysis and schistocytosis in the emergency department: consider pseudothrombotic microangiopathy related to vitamin B12 deficiency. QJM 2013; 106:1017-22. [PMID: 23842487 DOI: 10.1093/qjmed/hct142] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND Hemolytic anemia with thrombocytopenia and schistocytosis is suggestive of thrombotic thrombocytopenic purpura (TTP). However, these features can occur in the context of vitamin B12 deficiency. AIM To identify simple means of distinguishing between TTP and pseudothrombotic microangiopathies related to vitamin B12 deficiency (pseudo-TMA) at the bedside. DESIGN AND METHODS Retrospective study of patients with pseudo-TMA compared with patients with TTP. The patients with pseudo-TMA were further compared with other cases of cobalamin deficiency, in order to detect factors associated with microangiopathic hemolysis during vitamin B12 deprivation. RESULTS Seven patients with pseudo-TMA were compared with six patients with TTP. The pseudo-TMA patients had higher median lactate dehydrogenase (LDH) levels (7310 vs. 1460 IU/l, P = 0.01), a higher platelet count (73 vs.12.5 × 10(9)/l, P = 0.0023), a lower reticulocyte count (13.1 vs. 265.5 × 10(9)/l, P = 0.0012) and a lower neutrophil count (1.3 vs. 5.1 × 10(9)/l, P = 0.0023). When compared with 21 patients with vitamin B12 deficiency and anemia (but no schistocytosis), the pseudo-TMA patients were more likely to present with pernicious anemia [7 out of 21 (33.3%) vs. 5 out of 7 (71.4%), respectively] and had lower vitamin B12 levels (105 vs. 45 µmol/l, respectively). Vitamin supplementation led to hematological improvements in all pseudo-TMA patients. CONCLUSION In a context of mechanical hemolysis with thrombocytopenia in a patient admitted to the emergency department, very high LDH levels and a low reticulocyte count are strongly suggestive of pseudo-TMA and should prompt the physician to screen for cobalamin deficiency.
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Affiliation(s)
- N Noël
- MD, PhD, Service de Médecine Interne, Hôpital Bicêtre, 78, rue du Général Leclerc, F-94275 Le Kremlin Bicêtre cedex, France.
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Noël N, Couteau J, Maillet G, Gobet F, d'Aloisio F, Minier C, Pfister C. [Preliminary study of p53 and FGFR3 gene mutations in the urine for bladder tumors]. Prog Urol 2012; 23:29-35. [PMID: 23287481 DOI: 10.1016/j.purol.2012.09.015] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Revised: 07/27/2012] [Accepted: 09/17/2012] [Indexed: 11/30/2022]
Abstract
INTRODUCTION Two major pathways are described in bladder carcinogenesis: one for invasive or high grade tumors characterized by alteration of the p53 tumor suppressor gene and the other for non-invasive tumors or low grade involving mutations FGFR3. The objective of our study was to validate the research in the urine of mutations in these two genes in patients with a bladder tumor. PATIENTS AND METHODS In our preliminary study, we investigated 36 patients the FGFR3 and p53 mutations in tumors and urine collected during endoscopic resection. The p53 mutations were sought in FASAY, which allows a functional analysis of the protein P53. The FGFR3 mutations were sought in SNaPshot that searches the eight most frequent mutation points of this gene. RESULTS For 24 patients (66% of cases), we found at least one of the two mutations in the tumor. This mutation was present in the urine in 15 patients (sensitivity=62.5%). In only one patient, we found a mutation in the urinary sediment that did not exist in the tumor (specificity=91.7%). CONCLUSION The search for mutations of p53 and FGFR3 in the urine was a simple and non-invasive assay, which seems superior to urinary cytology for the detection of bladder tumors, raising hopes of an interest in this bio-assay for surveillance of bladder tumors and screening risk populations.
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Affiliation(s)
- N Noël
- Service d'urologie, CHU Charles-Nicolle, 1, rue de Germont, 76031 Rouen, France
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Conn B, Ederoclite A, Rix HW, Martin N, Noël N, Bensby T, Lane R, Lewis G, Ibata R, Irwin M, Beers T, Lee Y. The ESO-Max Planck photometric and spectroscopic survey in the south: EMPhaSSiS. EPJ Web of Conferences 2012. [DOI: 10.1051/epjconf/20121909007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Joud P, Barbotin C, Jennequin J, Laurent A, Bourret RM, Noël N. Poster 20. Rev Mal Respir 2008. [DOI: 10.1016/s0761-8425(08)71643-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Pozzo C, Pyrhönen S, Bodrogi I, Szanto J, Kamica-Mlodkowska H, Starkammar H, Izso J, Hansen P, Kjaer M, Noël N, Gruia G, Barone C. A randomized phase II trial assessing irinotecan (IRI) and 5FU/folinic acid (LV), “Mayo regimen”, in first line palliative chemotherapy patients (pts) with metastatic colorectal cancer (MCRC). Eur J Cancer 1999. [DOI: 10.1016/s0959-8049(99)80646-7] [Citation(s) in RCA: 6] [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: 11/29/2022]
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Cadel S, Foulon T, Viron A, Balogh A, Midol-Monnet S, Noël N, Cohen P. Aminopeptidase B from the rat testis is a bifunctional enzyme structurally related to leukotriene-A4 hydrolase. Proc Natl Acad Sci U S A 1997; 94:2963-8. [PMID: 9096329 PMCID: PMC20305 DOI: 10.1073/pnas.94.7.2963] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
An aminopeptidase B (Ap-B) was previously purified to homogeneity from rat testis extracts and characterized. In the present work, by using oligonucleotides selected on the basis of partial amino acid microsequences of pure Ap-B and PCR techniques, the nucleotide sequence of a 2.2-kb cDNA was obtained. The deduced amino acid sequence corresponds to a 648-residue protein (72.3 kDa) containing the canonical "HEXXHX18E" signature, which allowed its classification as a member of the M1 family of metallopeptidases. It exhibits 33% identity and 48% similarity with leukotriene-A4 hydrolase, a relation further supported by the capacity of Ap-B to hydrolyze leukotriene A4. Both enzymes also were closely related to a partially sequenced protein from Dictyostelium discoideum, which might constitute the putative common ancestor of either aminopeptidase or epoxide hydrolase, or both. Ap-B and its mRNA were detected in the germ line and in the Sertoli and peritubular cells of the seminiferous tubules. Because the enzyme was found in the medium conditioned by spermatocytes and spermatids and in the acrosome during spermatozoa formation, together these observations suggested an involvement of this exometallopeptidase in the secretory pathway. It is concluded that this ubiquitous enzyme may be involved in multiple processing mechanisms.
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Affiliation(s)
- S Cadel
- Unité de Recherche Associée au Centre National de la Recherche Scientifique 1682, Université Pierre et Marie Curie, Paris, France
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Gros C, Noël N, Souque A, Schwartz JC, Danvy D, Plaquevent JC, Duhamel L, Duhamel P, Lecomte JM, Bralet J. Mixed inhibitors of angiotensin-converting enzyme (EC 3.4.15.1) and enkephalinase (EC 3.4.24.11): rational design, properties, and potential cardiovascular applications of glycopril and alatriopril. Proc Natl Acad Sci U S A 1991; 88:4210-4. [PMID: 1851998 PMCID: PMC51628 DOI: 10.1073/pnas.88.10.4210] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Angiotensin-converting enzyme (ACE) and enkephalinase, two cell surface metallopeptidases, are responsible for angiotensin II formation and atrial natriuretic factor (ANF) degradation, respectively, and thereby play a critical role in the metabolism of hormonal peptides exerting essentially opposite actions in cardiovascular regulations. To affect simultaneously both hormonal systems by a single molecular structure, we have designed glycoprilat and alatrioprilat [(S)-N-[3-(3,4-methylene-dioxyphenyl)-2-(mercaptomethyl)-1-oxoprop yl] glycine and -alanine, respectively]. In vitro the two compounds inhibit both ACE and enkephalinase activities with similar, nanomolar potencies, and in vivo, glycopril and alatriopril, the corresponding diester prodrugs, occupy the two enzyme molecules in lung at similar low dosages (0.2-0.5 mg/kg of body weight, per os). The high potency of these compounds is attributable to interaction of the methylenedioxy group with the S1 subsite of ACE and of the aromatic ring with the S1' subsite of enkephalinase. In rodents, low doses of these mixed inhibitors exert typical actions of ACE inhibitors--i.e., prevention of angiotensin I-induced hypertension--as well as of enkephalinase inhibitors--i.e., protection from 125I-ANF degradation or enhancement of diuresis and natriuresis following acute extracellular volume expansion. In view of the known counterbalanced physiological actions of the two hormonal peptides, whose metabolism is controlled by ACE and enkephalinase, mixed inhibitors of the two peptidases show promise for the treatment of various cardiovascular and salt-retention disorders.
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Affiliation(s)
- C Gros
- Institut National de la Santé et de la Recherche Médicale, Centre Paul Broca, Paris, France
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