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Lemaire M, Raffray M, Siebert M, Vigneau C, Vabret E. Facteurs influençant le choix de la technique de dialyse par les patients insuffisants rénaux chroniques stade V. Nephrol Ther 2022. [DOI: 10.1016/j.nephro.2022.07.067] [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: 10/14/2022]
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Laurent V, Uzel A, Hélaine V, Nauton L, Traïkia M, Gefflaut T, Salanoubat M, de Berardinis V, Lemaire M, Guérard‐Hélaine C. Exploration of Aldol Reactions Catalyzed by Stereoselective Pyruvate Aldolases with 2‐Oxobutyric Acid as Nucleophile. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900128] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- V. Laurent
- Université Clermont AuvergneCNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand 63000 Clermont-Ferrand France
| | - A. Uzel
- Université Clermont AuvergneCNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand 63000 Clermont-Ferrand France
| | - V. Hélaine
- Université Clermont AuvergneCNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand 63000 Clermont-Ferrand France
| | - L. Nauton
- Université Clermont AuvergneCNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand 63000 Clermont-Ferrand France
| | - M. Traïkia
- Université Clermont AuvergneCNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand 63000 Clermont-Ferrand France
| | - T. Gefflaut
- Université Clermont AuvergneCNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand 63000 Clermont-Ferrand France
| | - M. Salanoubat
- Génomique Métabolique, Génoscope, Institut François Jacob, CEA, CNRS, Univ. EvryUniversité Paris-Saclay 91057 Evry France
| | - V. de Berardinis
- Génomique Métabolique, Génoscope, Institut François Jacob, CEA, CNRS, Univ. EvryUniversité Paris-Saclay 91057 Evry France
| | - M. Lemaire
- Université Clermont AuvergneCNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand 63000 Clermont-Ferrand France
| | - C. Guérard‐Hélaine
- Université Clermont AuvergneCNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand 63000 Clermont-Ferrand France
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Lemaire M, Boudry G, Ménard O, Le Ruyet P, Baudry C, Gérard P, Dupont D, Deglaire A, Le Huërou-Luron I, Blat S. La matière grasse laitière et le probiotique L. fermentum incorporés dans des préparations pour nourrissons modulent leur digestion ainsi que la composition du microbiote et les propriétés barrière de l’intestin chez le mini-porc. NUTR CLIN METAB 2019. [DOI: 10.1016/j.nupar.2019.01.401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Michiels L, Lemaire M, Moraine JJ, Preiser JC. Évolution de la dépense énergétique des patients de soins intensifs au cours de la mobilisation sur cycloergomètre. NUTR CLIN METAB 2018. [DOI: 10.1016/j.nupar.2018.09.135] [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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Lemaire M, Dou S, Cahu A, Romé V, Canlet C, Tremblay-Franco M, Rhimi M, Cuinet I, Le Ruyet P, Baudry C, Gérard P, Blat S, Le Huërou-Luron I. La matière grasse laitière et le probiotique L. fermentum CECT 5716 incorporés dans des formules infantiles programment la composition du microbiote et la fonction endocrine intestinale dans un modèle miniporc. NUTR CLIN METAB 2018. [DOI: 10.1016/j.nupar.2018.09.194] [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: 10/27/2022]
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Schulz E, Bethmont V, Fahmi K, Fache F, Lemaire M. Synthèse et polymérisation de thiophènes substitués en 3 par des chaînes alkyles chirales. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1995920783] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Garreau R, Roncali J, Garnier F, Lemaire M. Réduction des contraintes stériques (empêchement à la conjugaison) dans les poly(dialkyl-3,4-thiophènes). ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1989860093] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Lemaire M, Delabouglise D, Garreau R, Roncali J. Synthèse et propriétés des deux formes énantiomères de poly(thiophènes) chiraux. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1989860193] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Lemaire M, Lucidi V, Katsanos G, Bouazza F, Gomez Galdon M, Larsimont D, Delatte P, Vouche M, Hendlisz A, Flamen P, Donckier V. Feasibility and safety of a therapeutic strategy using selective transarterial radioembolization followed by surgery for hepatocellular carcinoma in cirrhotic patients. Eur J Cancer 2017. [DOI: 10.1016/s0959-8049(17)30358-1] [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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Barba E, Lemaire M, Chase G, Desaive T, Preiser JC. Effet de la mobilisation sur l’insulinosensibilité des patients de soins intensifs. NUTR CLIN METAB 2016. [DOI: 10.1016/j.nupar.2016.09.038] [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: 10/20/2022]
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Affiliation(s)
- J Lavaur
- Institut National de la Santé et de la Recherche Médicale, U 1127, CNRS, Unité Mixte de Recherche (UMR) 7225, Sorbonne Universités, UPMC Univ Paris 06, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, Paris, France
| | - M Lemaire
- Air Liquide Healthcare, Medical R&D Paris, Saclay Research Center, Jouy-en Josas, France
| | - J Pype
- Air Liquide Healthcare, Medical R&D Paris, Saclay Research Center, Jouy-en Josas, France
| | - D Le Nogue
- Institut National de la Santé et de la Recherche Médicale, U 1127, CNRS, Unité Mixte de Recherche (UMR) 7225, Sorbonne Universités, UPMC Univ Paris 06, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, Paris, France
| | - E C Hirsch
- Institut National de la Santé et de la Recherche Médicale, U 1127, CNRS, Unité Mixte de Recherche (UMR) 7225, Sorbonne Universités, UPMC Univ Paris 06, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, Paris, France
| | - P P Michel
- Institut National de la Santé et de la Recherche Médicale, U 1127, CNRS, Unité Mixte de Recherche (UMR) 7225, Sorbonne Universités, UPMC Univ Paris 06, UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, Paris, France
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Silva LN, Lemaire M, Plourde D, Lemarié C, Lehoux S, Mann K. Prenatal exposure to methylated arsenicals enhances atherosclerosis in the ApoE−/− mouse model. Toxicol Lett 2015. [DOI: 10.1016/j.toxlet.2015.08.753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Lemaire M, El-Hage W, Frangou S. Increased affective reactivity to neutral stimuli and decreased maintenance of affective responses in bipolar disorder. Eur Psychiatry 2015; 30:852-60. [PMID: 26443053 DOI: 10.1016/j.eurpsy.2015.07.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 07/11/2015] [Accepted: 07/12/2015] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Affective dysregulation is a core feature of bipolar disorder (BD) and a significant predictor of clinical and functional outcome. Affective dysregulation can arise from abnormalities in multiple processes. This study addresses the knowledge gap regarding the precise nature of the processes that may be dysregulated in BD and their relationship to the clinical expression of the disorder. METHODS Patients with BD (n=45) who were either in remission or in a depressive or manic state and healthy individuals (n=101) were compared in terms of the intensity, duration and physiological response (measured using inter-beat intervals and skin conductance) to affective and neutral pictures during passive viewing and during experiential suppression. RESULTS Compared to healthy individuals, patients with BD evidenced increased affective reactivity to neutral pictures and reduced maintenance of subjective affective responses to all pictures. This pattern was present irrespective of clinical state but was more pronounced in symptomatic patients, regardless of polarity. Patients, regardless of symptomatic status, were comparable to healthy individuals in terms of physiological arousal and voluntary control of affective responses. CONCLUSION Our study demonstrates that increased affective reactivity to neutral stimuli and decreased maintenance of affective responses are key dimensions of affective dysregulation in BD.
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Affiliation(s)
- M Lemaire
- UMR Inserm U930, University François-Rabelais, Tours, France; CHRU Tours, Department of Child Psychiatry, Tours, France
| | - W El-Hage
- UMR Inserm U930, University François-Rabelais, Tours, France; CHRU Tours, Department of Adult Psychiatry (CPU), Tours, France
| | - S Frangou
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, USA.
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Borrini J, Favre-Reguillon A, Lemaire M, Gracia S, Arrachart G, Bernier G, Hérès X, Hill C, Pellet-Rostaing S. Water Soluble PDCA Derivatives for Selective Ln(III)/An(III) and Am(III)/Cm(III) Separation. Solvent Extraction and Ion Exchange 2014. [DOI: 10.1080/07366299.2014.974449] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Lefort H, Travers S, Ernouf C, Maurin O, Distinguin B, Fontaine E, Lemaire M, Margerin S, Jost D, Tourtier J, Domanski L. The Role of Hemostatic Product-Impregnated Dressings in the Pre-Hospital Control of External Bleeding. Prospective Observational Study. J Emerg Med 2014. [DOI: 10.1016/j.jemermed.2013.11.035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Montagut-Romans A, Boulven M, Lemaire M, . Popowycz F. Efficient C-3 reductive alkylation of 4-hydroxycoumarin by dehydrogenative oxidation of benzylic alcohols through ruthenium catalysis. NEW J CHEM 2014. [DOI: 10.1039/c3nj01517c] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Lemaire M, Nagnan P, Clement JL, Lange C, Peru L, Basselier JJ. Geranyllinalool (Diterpene Alcohol) : An insecticidal component of pine wood and termites (Isoptera: Rhinotermitidae) in four European ecosystems. J Chem Ecol 2013; 16:2067-79. [PMID: 24264007 DOI: 10.1007/bf01020517] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/1988] [Accepted: 11/28/1989] [Indexed: 11/26/2022]
Abstract
Geranyllinalool is an insecticidal component of pine wood and of the defensive secretion ofReticulitermes species. Lethal doses (LD50) were calculated for termites and various ant species. Termite workers were very resistant (10,000 ppm). Ant resistance varies among species according to their trophic strategy and attack mode. The geranyllinalool acts as a natural insecticide against some ant predators (LD50=6 ppm), which use raid or chemical crypsis to invade termite nests. In contrast, predators laying the venom on the cuticle of their termite prey were very resistant (10,000 ppm). Generally, ants acting as space competitors could detoxify the quantity emitted by one termite soldier (18 ppm).
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Affiliation(s)
- M Lemaire
- Museum Gabriel Foucher, Parc Saint-Paul, 18000, Bourges, France
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Vaglio–Gaudard C, Leray O, Lemaire M, Colombier A, Hudelot J. First feedback with the AMMON integral experiment for the JHR calculations. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20134205001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Colombier AC, Amharrak H, Fourmentel D, Ravaux S, Régnier D, Gueton O, Hudelot JP, Lemaire M. Nuclear data production, calculation and measurement: a global overview of the gamma heating issue. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20134204001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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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Simon G, Eljezi T, Legeret B, Charmantray F, Castillo JA, Guérard-Hélaine C, Lemaire M, Bouzon M, Marlière P, Hélaine V, Hecquet L. Synthesis of Specially Designed Probes to Broaden Transketolase Scope. ChemCatChem 2013. [DOI: 10.1002/cctc.201200479] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Audoin B, Crespy L, Zaaraoui W, Lemaire M, Jure L, Rico A, Faivre A, Reuter F, Malikova I, Cozzone P, Ranjeva JP, Pelletier J. Détection des anomalies individuelles de la substance grise au stade précoce de la sclérose en plaques par cartographie statistique des cartes de taux de transfert d’aimantation. Rev Neurol (Paris) 2012. [DOI: 10.1016/j.neurol.2012.01.511] [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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Irani Y, Pype JL, Martin AR, Chong CF, Daniel L, Gaudart J, Ibrahim Z, Magalon G, Lemaire M, Hardwigsen J. Noble gas (argon and xenon)-saturated cold storage solutions reduce ischemia-reperfusion injury in a rat model of renal transplantation. Nephron Extra 2012; 1:272-82. [PMID: 22470401 PMCID: PMC3290848 DOI: 10.1159/000335197] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND Following kidney transplantation, ischemia-reperfusion injury contributes to adverse outcomes. The purpose of this study was to determine whether a cold-storage solution saturated with noble gas (xenon or argon) could limit ischemia-reperfusion injury following cold ischemia. METHODS Sixty Wistar rats were randomly allocated to 4 experimental groups. Kidneys were harvested and then stored for 6 h before transplantation in cold-storage solution (Celsior®) saturated with either air, nitrogen, xenon or argon. A syngenic orthotopic transplantation was performed. Renal function was determined on days 7 and 14 after transplantation. Transplanted kidneys were removed on day 14 for histological and immunohistochemical analyses. RESULTS Creatinine clearance was significantly higher and urinary albumin significantly lower in the argon and xenon groups than in the other groups at days 7 and 14. These effects were considerably more pronounced for argon than for xenon. In addition, kidneys stored with argon, and to a lesser extent those stored with xenon, displayed preserved renal architecture as well as higher CD-10 and little active caspase-3 expression compared to other groups. CONCLUSION Argon- or xenon-satured cold-storage solution preserved renal architecture and function following transplantation by reducing ischemia-reperfusion injury.
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Affiliation(s)
- Y Irani
- Department of Plastic and Reconstructive Surgery, Jouy-en-Josas, France
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Czerwinski KR, Draye M, Favre-Réguillon A, Foos J, Guy A, Lemaire M. Ion Selective Resins: Development and Applications for Nuclear Waste Management. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-556-1277] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractOrganic based ion selective resins have some similar attributes: case of synthesis, high metal ion complexation ability, and flexibility for different nuclear waste management applications. For most chelating polymers, the ligand is deemed to be of primary importance for the interaction with the targeted metal ion. The role of the polymer matrix is usually ignored. For ion specific resins, the polymer structure is formed to a specific metal ion. Using the molecular imprinting technique, resins can be formed with functional groups and cavities for a target metal ion. Ion selective resins have been developed for the separation of Cs. The methods and concepts used for the development of the Cs specific resins have been applied to the development of selective resins for Eu (a trivalent actinide model). The resulting resins are characterized by FTIR spectroscopy, moisture regain, and ion exchange capacity. The incorporation of 8-hydroxyquinoline into the resin increases selectivity for Eu over La. The results for the Eu study indicate ion specific resins can be developed for the separation of trivalent actinides from nuclear waste.
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Affiliation(s)
- A. Sorin
- Laboratoire de Catalyse et Synthèse Organique, Université Claude Bernard Lyon 1, CPE Lyon, Villeurbanne Cedex, France
| | - S. Pellet-Rostaing
- Laboratoire de Catalyse et Synthèse Organique, Université Claude Bernard Lyon 1, CPE Lyon, Villeurbanne Cedex, France
| | - A. Favre-Reguillon
- Laboratoire de Catalyse et Synthèse Organique, Université Claude Bernard Lyon 1, CPE Lyon, Villeurbanne Cedex, France
| | - M. Lemaire
- Laboratoire de Catalyse et Synthèse Organique, Université Claude Bernard Lyon 1, CPE Lyon, Villeurbanne Cedex, France
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Borrini J, Bernier G, Pellet-Rostaing S, Favre-Reguillon A, Lemaire M. Separation of lanthanides(III) by inorganic nanofiltration membranes using a water soluble complexing agent. J Memb Sci 2010. [DOI: 10.1016/j.memsci.2009.10.034] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [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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Deleu S, Lemaire M, Arts J, Menu E, Van Valckenborgh E, King P, Vande Broek I, De Raeve H, Van Camp B, Croucher P, Vanderkerken K. The effects of JNJ-26481585, a novel hydroxamate-based histone deacetylase inhibitor, on the development of multiple myeloma in the 5T2MM and 5T33MM murine models. Leukemia 2009; 23:1894-903. [DOI: 10.1038/leu.2009.121] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Niderkorn V, Morgavi D, Aboab B, Lemaire M, Boudra H. Cell wall component and mycotoxin moieties involved in the binding of fumonisin B1and B2by lactic acid bacteria. J Appl Microbiol 2009; 106:977-85. [DOI: 10.1111/j.1365-2672.2008.04065.x] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.5] [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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Bihorel S, Camenisch G, Lemaire M, Scherrmann JM. Influence of breast cancer resistance protein (Abcg2) and p-glycoprotein (Abcb1a) on the transport of imatinib mesylate (Gleevec) across the mouse blood-brain barrier. J Neurochem 2007; 102:1749-1757. [PMID: 17696988 DOI: 10.1111/j.1471-4159.2007.04808.x] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Imatinib, a protein tyrosine kinase inhibitor, may prevent the growth of glioblastoma cells. Unfortunately, its brain distribution is restricted by p-glycoprotein (p-gp or multidrug resistance protein Mdr1a), and probably by breast cancer resistance protein (Bcrp1), two efflux pumps expressed at the blood-brain barrier (BBB). We have used in situ brain perfusion to investigate the mechanisms of imatinib transport across the mouse BBB. The brain uptake of imatinib in wild-type mice was limited by saturable efflux processes. The inhibition of p-gp, by valspodar and zosuquidar, increased imatinib uptake (2.5-fold), as did the deficiency of p-gp in Mdr1a/1b(-/-) mice (5.5-fold). Perfusing imatinib with the p-gp/Bcrp1 inhibitor, elacridar, enhanced the brain uptake of imatinib in wild-type (4.1-fold) and Mdr1a/1b(-/-) mice (1.2-fold). However, the brain uptake of imatinib was similar in wild-type and Bcrp1(-/-) mice when it was perfused at a non-saturating concentration. The brain uptake of CGP74588, an active metabolite of imatinib, was low. It was increased by perfusion with elacridar (twofold), but not with valspodar and zosuquidar. CGP74588 uptake was 1.5 times greater in Bcrp1(-/-) mice than in wild-type mice. These data suggest that imatinib transport at the mouse BBB is limited by p-gp and probably by Bcrp1, and that CGP74588 transport is restricted by Bcrp1.
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MESH Headings
- ATP Binding Cassette Transporter, Subfamily B/antagonists & inhibitors
- ATP Binding Cassette Transporter, Subfamily B/genetics
- ATP Binding Cassette Transporter, Subfamily B/metabolism
- ATP Binding Cassette Transporter, Subfamily B, Member 1
- ATP Binding Cassette Transporter, Subfamily G, Member 2
- ATP-Binding Cassette Transporters/antagonists & inhibitors
- ATP-Binding Cassette Transporters/genetics
- ATP-Binding Cassette Transporters/metabolism
- Acridines/pharmacology
- Animals
- Antineoplastic Agents/metabolism
- Benzamides
- Biological Transport, Active/drug effects
- Biological Transport, Active/physiology
- Blood-Brain Barrier/drug effects
- Blood-Brain Barrier/metabolism
- Brain/blood supply
- Brain/drug effects
- Brain/metabolism
- Cyclosporins/pharmacology
- Dibenzocycloheptenes/pharmacology
- Dose-Response Relationship, Drug
- Enzyme Inhibitors/pharmacology
- Imatinib Mesylate
- Immunosuppressive Agents/pharmacology
- Male
- Mice
- Mice, Knockout
- Piperazines/metabolism
- Piperazines/pharmacokinetics
- Pyrimidines/metabolism
- Pyrimidines/pharmacokinetics
- Quinolines/pharmacology
- Tetrahydroisoquinolines/pharmacology
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Affiliation(s)
- Sébastien Bihorel
- Université Paris Descartes, Faculté de Pharmacie, Neuropsychopharmacologie des addictions, CNRS, UMR7157 et Université Paris 7, FranceINSERMS U705, Paris, FranceDepartment of Drug Metabolism and Pharmacokinetics, Novartis Pharma AG, Basel, SwitzerlandAP-HP, Hôpital Fernand Widal, Paris, France
| | - Gian Camenisch
- Université Paris Descartes, Faculté de Pharmacie, Neuropsychopharmacologie des addictions, CNRS, UMR7157 et Université Paris 7, FranceINSERMS U705, Paris, FranceDepartment of Drug Metabolism and Pharmacokinetics, Novartis Pharma AG, Basel, SwitzerlandAP-HP, Hôpital Fernand Widal, Paris, France
| | - Michel Lemaire
- Université Paris Descartes, Faculté de Pharmacie, Neuropsychopharmacologie des addictions, CNRS, UMR7157 et Université Paris 7, FranceINSERMS U705, Paris, FranceDepartment of Drug Metabolism and Pharmacokinetics, Novartis Pharma AG, Basel, SwitzerlandAP-HP, Hôpital Fernand Widal, Paris, France
| | - Jean-Michel Scherrmann
- Université Paris Descartes, Faculté de Pharmacie, Neuropsychopharmacologie des addictions, CNRS, UMR7157 et Université Paris 7, FranceINSERMS U705, Paris, FranceDepartment of Drug Metabolism and Pharmacokinetics, Novartis Pharma AG, Basel, SwitzerlandAP-HP, Hôpital Fernand Widal, Paris, France
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Alame M, Jahjah M, Berthod M, Lemaire M, Meille V, de Bellefon C. New 5,5′-disubstituted BINAP derivatives: Syntheses and pressure and electronic effects in Rh asymmetric hydrogenation. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.molcata.2006.12.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Bihorel S, Camenisch G, Lemaire M, Scherrmann JM. Modulation of the brain distribution of imatinib and its metabolites in mice by valspodar, zosuquidar and elacridar. Pharm Res 2007; 24:1720-8. [PMID: 17380257 DOI: 10.1007/s11095-007-9278-4] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2006] [Accepted: 02/20/2007] [Indexed: 01/02/2023]
Abstract
PURPOSE The selective protein tyrosine kinase inhibitor, imatinib, inhibits the growth of glioma cells in preclinical models, but its poor brain distribution limits its efficacy in patients. P-glycoprotein (P-gp, rodent Mdr1a/1b or Abcb1a/1b) and Breast cancer resistance protein (rodent Bcrp1 or Abcg2) were suggested to restrict the delivery of imatinib to the brain. This study evaluates the effect of administering selective inhibitors of these transporters together with imatinib on the systemic and cerebral disposition of imatinib in mice. MATERIALS AND METHODS Wild-type, Mdr1a/1b(-/-) and Bcrp1(-/-) mice were given imatinib intravenously, either alone, or with valspodar, zosuquidar (P-gp inhibitors), or elacridar (a P-gp and Bcrp1 inhibitor). The blood and brain concentrations of [(14)C]imatinib and its radioactive metabolites were determined. RESULTS The blockade of P-gp by valspodar or zosuquidar (>3 mg/kg) enhanced the brain uptake of imatinib ( approximately 4-fold) in wild-type mice, but not that of its metabolites. Blockade of both P-gp and Bcrp1 by elacridar (>3 mg/kg) produced significantly greater brain penetration of imatinib (9.3-fold) and its metabolites (2.8-fold). In contrast, only the lack of P-gp enhanced imatinib brain penetration (6.4-fold) in knockout mice. These results of brain uptake correlated reasonably well with those obtained previously by our group using in situ brain perfusion. CONCLUSIONS Imatinib and its metabolites penetrate into the brain poorly and their penetration is limited by P-gp and (probably) Bcrp1. Administering imatinib together with P-gp (and Bcrp1) transporter inhibitors such as elacridar may improve the delivery of imatinib to the brain, making it potentially more effective against malignant gliomas.
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Affiliation(s)
- Sébastien Bihorel
- INSERM, U705, CNRS, UMR 7157, Université Paris 7, Université Paris 5, Faculté de Pharmacie, Laboratoire de Pharmacocinétique, Paris, France
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Favre-Réguillon A, Fiaty K, Laurent P, Poriel L, Pellet-Rostaing S, Lemaire M. Solid/Liquid Extraction of Zirconium and Hafnium in Hydrochloric Acid Aqueous Solution with Anion Exchange ResinKinetic Study and Equilibrium Analyses. Ind Eng Chem Res 2007. [DOI: 10.1021/ie060444p] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- A. Favre-Réguillon
- Laboratoire de Chimie Organique, UMR CNRS 7084, Conservatoire National des Arts et métiers, 2 rue Conté, 75003 Paris, France
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Hintermann S, Vranesic I, Allgeier H, Brülisauer A, Hoyer D, Lemaire M, Moenius T, Urwyler S, Whitebread S, Gasparini F, Auberson YP. ABP688, a novel selective and high affinity ligand for the labeling of mGlu5 receptors: Identification, in vitro pharmacology, pharmacokinetic and biodistribution studies. Bioorg Med Chem 2007; 15:903-14. [PMID: 17110115 DOI: 10.1016/j.bmc.2006.10.038] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2006] [Accepted: 10/19/2006] [Indexed: 10/24/2022]
Abstract
[(11)C]ABP688 (2) has recently been demonstrated to be a useful PET tracer for in vivo imaging of the metabotropic glutamate receptors type 5 (mGluR5) in rodents. We describe here the identification and preclinical profiling of ABP688 and its tritiated version [(3)H]ABP688, and show that its high affinity (K(d)=2nM), selectivity, and pharmacokinetic properties fulfill all requirements for development as a PET tracer for clinical imaging of the mGlu5 receptor.
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Affiliation(s)
- Samuel Hintermann
- Novartis Institutes for BioMedical Research, 4002 Basel, Switzerland
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Bouquet M, Guy A, Lemaire M, Guetté JP. Preparation of Alkylarylcarbinols by Mono-Oxydation at the Benzylic Position Using 2,3-Dichloro-5,6-Dicyanobenzoquinone (D.D.Q.). SYNTHETIC COMMUN 2006. [DOI: 10.1080/00397918508077258] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [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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Poriel L, Pellet‐Rostaing S, Lamotte V, Lemaire M, Favre‐Réguillon A. Zirconium and Hafnium Separation, Part 2. Solid/Liquid Extraction in Hydrochloric Acid Aqueous Solution with Anion Exchange Resins. SEP SCI TECHNOL 2006. [DOI: 10.1080/01496390600725711] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Poriel L, Chitry F, Pellet‐Rostaing S, Lemaire M, Favre‐Réguillon A. Zirconium and Hafnium Separation, Part 3. Ligand‐Enhanced Separation of Zirconium and Hafnium from Aqueous Solution using Nanofiltration. SEP SCI TECHNOL 2006. [DOI: 10.1080/01496390600725810] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Bihorel S, Camenisch G, Gross G, Lemaire M, Scherrmann JM. Influence of hydroxyurea on imatinib mesylate (gleevec) transport at the mouse blood-brain barrier. Drug Metab Dispos 2006; 34:1945-9. [PMID: 16936068 DOI: 10.1124/dmd.106.010975] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The combination of imatinib mesylate and hydroxyurea provides a therapeutic benefit in patients with glioblastoma, although each drug is not effective when used alone. The increase of brain delivery of one or both drugs has been suggested to be a potential cause of this therapeutic benefit. The cross-influence of hydroxyurea and imatinib on their respective brain distribution was examined in mice and rats. We used in situ brain perfusion in mice to determine whether these two drugs have an influence on their respective initial transport across the blood-brain barrier. The brain penetration of hydroxyurea, assessed by its brain uptake clearance, Knet, was low in mice (approximately 0.10 microl/g/s) and not modified by coperfusion of imatinib (0.5-500 microM). Likewise, the brain penetration of imatinib was low (Knet, 1.39 +/- 0.17 microl/g/s) and not modified by direct coperfusion of hydroxyurea (0.2-1000 microM) or by intravenous pretreatment with 15 or 1000 mg/kg hydroxyurea. We also examined a potential time-dependent influence of hydroxyurea on imatinib brain distribution after sustained subcutaneous administration in rats using an implantable osmotic pump. The brain penetration of imatinib in rats increased with time, approximately 1.6-fold (p < 0.01) after 7 and 14 days' infusion of imatinib (3 mg/day) with or without hydroxyurea (15 mg/day), and was not influenced by hydroxyurea. The results of these two sets of experiments indicate that hydroxyurea has no significant influence on the brain distribution of imatinib in mice and rats.
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Affiliation(s)
- Sébastien Bihorel
- Institut National de la Santé et de la Recherche Médicale, INSERM U705, Université Paris 7, Paris, France
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Sorin A, Favre-Réguillon A, Pellet-Rostaing S, Bernier G, Lemaire M. Polyaminocarboxylic acids rejection by charged nanofiltration membrane. J Memb Sci 2006. [DOI: 10.1016/j.memsci.2005.12.037] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [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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Poriel L, Favre‐Réguillon A, Pellet‐Rostaing S, Lemaire M. Zirconium and Hafnium Separation, Part 1. Liquid/Liquid Extraction in Hydrochloric Acid Aqueous Solution with Aliquat 336. SEP SCI TECHNOL 2006. [DOI: 10.1080/01496390600725802] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Abstract
A patient presented with cholera and a severe degree of ECF volume contraction. Despite large losses of bicarbonate (HCO3-)-containing diarrhoeal fluid, laboratory acid-base values were remarkably close to normal. A detailed analysis emphasizing principles of physiology and a quantitative approach provided new insights and eventually better definitions of metabolic and respiratory acidosis. A shift in focus from HCO3- concentration to HCO3- content in the extracellular fluid (ECF) compartment revealed the presence of metabolic acidosis. Central to this analysis was an emphasis on the haematocrit to enable a more accurate estimate of the degree of ECF volume contraction. The latter also revealed 'contraction' metabolic alkalosis, which masked the underlying metabolic acidosis. The presence of a respiratory acidosis of the tissue type was evident from the raised venous PCO2, which was not surprising once the magnitude of the ECF contraction had been appreciated. 'Bad buffering', as defined by Professor McCance, was the immediate danger and prompted swift action to restore an effective circulation. The haematocrit and the venous PCO2 also contribute valuable information to monitor the response to therapy. Nevertheless, there were still dangers to be discovered when an in-depth analysis suggested that the administration of isotonic saline would introduce an unanticipated danger for the patient.
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Affiliation(s)
- N Zalunardo
- Division of Nephrology, Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
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Neil H, Lemaire M, Wésolowski-Louvel M. Regulation of glycolysis in Kluyveromyces lactis : role of KlGCR1 and KlGCR2 in glucose uptake and catabolism. Curr Genet 2004; 45:129-39. [PMID: 14685765 DOI: 10.1007/s00294-003-0473-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2003] [Revised: 10/30/2003] [Accepted: 11/10/2003] [Indexed: 10/26/2022]
Abstract
In Kluyveromyces lactis, the casein kinase I (Rag8p) regulates the transcription of glycolytic genes and the expression of the low-affinity glucose transporter gene RAG1. This control involves the transcription factor Sck1p, a homologue of Sgc1p of Saccharomyces cerevisiae. SGC1 is known to interact genetically with ScGCR1 and ScGCR2, which code for regulators of glycolytic gene expression. Therefore, we studied the role of KlGCR1 and KlGCR2 genes in K. lactis. The Klgcr1 null mutant could not grow on glucose when respiration was blocked by antimycin A (Rag(- )phenotype). In contrast, the Klgcr2 null mutant could grow under the same conditions, although at a reduced rate. In both mutants, the transcription of glycolytic genes was affected, while that of ribosomal protein genes was not modified. Furthermore, the transcription of the glucose permease genes was also found to be affected in the two mutants, although dissimilarly. While RAG1 transcription decreased at high glucose concentrations, the expression of the high-affinity glucose permease gene HGT1 was unexpectedly impaired under gluconeogenic conditions, in the absence of glucose. Gel mobility shift assays performed with purified maltose-binding protein-KlGcr1p showed that KlGcr1p could interact directly with the promoters of the glycolytic genes, but not with the promoters of the glucose permease genes. Thus, the control exerted by KlGcr1p and KlGcr2p upon glucose transporter genes is probably indirect.
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Affiliation(s)
- H Neil
- UMR 5122 CNRS/UCB/INSA, Microbiologie et Génétique, Université Claude Bernard, Bt Lwoff 43, Boulevard du 11 Novembre 1918, 69622, Villeurbanne, France
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Dispas M, Schynts F, Lemaire M, Letellier C, Vanopdenbosch E, Thiry E, Kerkhofs P. Isolation of a glycoprotein E-deleted bovine herpesvirus type 1 strain in the field. Vet Rec 2003; 153:209-12. [PMID: 12956298 DOI: 10.1136/vr.153.7.209] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
During a field trial to evaluate the efficacy of repeated vaccinations with bovine herpesvirus type 1 (BHV-1) marker vaccines, a glycoprotein E (gE)-negative BHV-1 strain was isolated from the nasal secretions of two cows, eight months after vaccination with a gE-negative live-attenuated vaccine, initially given intranasally, then intramuscularly. The strain isolated was characterised using immunofluorescence, restriction analysis and PCR. All the techniques used identified the isolated virus as a gE-negative BHV-1 phenotypically and genotypically identical to the Za strain used as a control.
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Affiliation(s)
- M Dispas
- Department Biocontrol/Section Epidemiology, Veterinary and Agrochemical Research Centre, Groeselenberg 99, 1180 Brussels, Belgium
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Abstract
The adequate distribution of STI-571 (Gleevec) to the central nervous system (CNS) is critical for its effective use in CNS tumors. P-glycoprotein-mediated efflux in the blood-brain barrier may play a role in the CNS delivery of this drug. Whether STI-571 is a substrate of P-glycoprotein was determined by examining the directional flux of [(14)C]STI-571 in parental and MDR1-transfected Madin-Darby canine kidney (MDCK) II epithelial cell monolayers. The basolateral-to-apical flux of STI-571 was 39-fold greater than the apical-to-basolateral flux in the MDR1-transfected cells and 8-fold greater in the parental cell monolayers. This difference in directional flux was significantly reduced by a specific P-glycoprotein inhibitor (2R)-anti-5-[3-[4-(10,11-difluoromethanodibenzo-suber-5-yl)piperazin-1-yl]-2-hydroxypropoxy]quinoline trihydrochloride (LY335979). The role of P-glycoprotein in the CNS distribution of STI-571 was examined in vivo, using wild-type and mdr1a/b (-/-) knockout mice that were orally administered 25 mg/kg [(14)C]STI-571. In the wild-type mice, the brain-to-plasma STI-571 concentration ratio at all time points was low (1-3%); however, there was an 11-fold greater brain partitioning of STI-571 at 1 h postdose in the mdr1a/b (-/-) mice compared with the wild-type mice. When 12.5 mg/kg STI-571 was given intravenously, the brain-to-plasma ratio of STI-571 in the mdr1a/b (-/-) mice was approximately 7-fold greater than that of wild-type mice up to 120 min postdose. These data indicate that STI-571 is a substrate of P-glycoprotein, and that the inhibition of P-glycoprotein affects the transport of STI-571 across MDCKII monolayers. Moreover, P-glycoprotein plays an important role in limiting the distribution of STI-571 to the CNS.
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Affiliation(s)
- HaiQing Dai
- Department of Pharmaceutics, University of Minnesota, Minneapolis, Minnesota 55455, USA
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Roncali J, Garreau R, Yassar A, Marque P, Garnier F, Lemaire M. Effects of steric factors on the electrosynthesis and properties of conducting poly(3-alkylthiophenes). ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100311a030] [Citation(s) in RCA: 234] [Impact Index Per Article: 10.6] [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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Abstract
Corticotropin-releasing factor (CRF) is known to play an important role in the body response to stress. Butyl-[2,5-dimethyl-7-(2,4,6-trimethylphenyl)-7H-pyrrolo[2,3-d]pyrimidin-4-yl]-ethylamine (CP-154,526) is a CRF(1) antagonist showing anxiolytic activities in rats in behavioral models, suggesting that CP-154,526 crosses the blood-brain barrier. However, there is no direct evidence for this. This study determined the pharmacokinetic profile of CP-154,526 in rats after i.v. and p.o. application. After i.v. bolus, the concentration declined in a biphasic manner, the first half-life being 0.9 h and the terminal one being 51 h. Systemic clearance was 36 ml/min/kg, and the volume of distribution was 105 l/kg. Oral bioavailability reached 27%. To study brain pharmacokinetics, rats were given a single dose of CP-154,526 p.o. or i.v. and sacrificed after different post-treatment times. Plasma, cortex, striatum, hypothalamus, hippocampus, and cerebellum concentrations were measured. After i.v. bolus, maximal brain concentration was reached after 20 min. The hypothalamus displayed significantly lower concentrations compared with the other brain tissues. In the p.o. study, the maximal plasma concentration was reached after 30 min, whereas the maximal brain concentration was observed after 1 h and remained stable until 2 h post-treatment, without significant differences between the brain tissues. The unidirectional brain extraction ratio was 27 and 9% at vascular concentrations of 0.08 and 16 nmol/ml, respectively. These results demonstrate a large brain penetration of CP-154,526 after i.v. and p.o. applications and a comparable distribution among the brain regions, except for the hypothalamus, which displayed lower concentrations after i.v. bolus.
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Bannerman DM, Lemaire M, Yee BK, Iversen SD, Oswald CJP, Good MA, Rawlins JNP. Selective cytotoxic lesions of the retrohippocampal region produce a mild deficit in social recognition memory. Exp Brain Res 2002; 142:395-401. [PMID: 11819048 DOI: 10.1007/s00221-001-0938-z] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2001] [Accepted: 10/12/2001] [Indexed: 10/27/2022]
Abstract
Although a number of studies have implicated the hippocampal formation in social recognition memory in the rat, a recent study in this laboratory has demonstrated that selective cytotoxic lesions, confined to the hippocampus proper (encompassing the four CA subfields and the dentate gyrus), are without effect on this behaviour. This finding suggests that the hippocampus proper does not subserve social recognition memory in the rat, but does not preclude the possibility that other areas of the hippocampal formation, such as the entorhinal cortex or subiculum, could support this form of learning. The present study addressed this issue by examining the effects of selective cytotoxic retrohippocampal (RHR) lesions (including both the entorhinal cortex and subiculum) on social recognition memory in the rat. RHR lesions produced a mild social recognition memory impairment, although lesioned animals still displayed a reduction in investigation time between the first and second exposure to the juvenile. This result is consistent with other studies which have implicated the retrohippocampal or parahippocampal area in olfactory recognition memory processes. It also suggests, however, that other areas, out with the retrohippocampal region, are also likely to play an important role in social recognition memory.
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Affiliation(s)
- D M Bannerman
- Department of Experimental Psychology, University of Oxford, South Parks Road, Oxford OX1 3UD, England,
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Vekemans X, Beauwens T, Lemaire M, Roldán-Ruiz I. Data from amplified fragment length polymorphism (AFLP) markers show indication of size homoplasy and of a relationship between degree of homoplasy and fragment size. Mol Ecol 2002; 11:139-51. [PMID: 11903911 DOI: 10.1046/j.0962-1083.2001.01415.x] [Citation(s) in RCA: 448] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We investigate the distribution of sizes of fragments obtained from the amplified fragment length polymorphism (AFLP) marker technique. We find that empirical distributions obtained in two plant species, Phaseolus lunatus and Lolium perenne, are consistent with the expected distributions obtained from analytical theory and from numerical simulations. Our results indicate that the size distribution is strongly asymmetrical, with a much higher proportion of small than large fragments, that it is not influenced by the number of selective nucleotides nor by genome size but that it may vary with genome-wide GC-content, with a higher proportion of small fragments in cases of lower GC-content when considering the standard AFLP protocol with the enzyme MseI. Results from population samples of the two plant species show that there is a negative relationship between AFLP fragment size and fragment population frequency. Monte Carlo simulations reveal that size homoplasy, arising from pulling together nonhomologous fragments of the same size, generates patterns similar to those observed in P. lunatus and L. perenne because of the asymmetry of the size distribution. We discuss the implications of these results in the context of estimating genetic diversity with AFLP markers.
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Affiliation(s)
- X Vekemans
- Université Libre de Bruxelles, Laboratoire de Génétique et Ecologie Végétales 1850 chaussée de Wavre, 1160 Bruxelles, Belgium.
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