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F Laffitte J P Chavoin P Guedj D Rouge M Costagliola 《Annales de chirurgie plastique et esthétique》1989,34(5):433-437
The authors present their experience of the use of carbon dioxide laser for the treatment of angiodysplasias (so-called "cavernous" angiomas). The reduction of operative haemorrhage and the simpler postoperative course resulting from the intraoperative and postoperative use of this technique have ensured very satisfactory results in a series of 76 patients. The limitations of the technique are defined. The authors also discuss the complex classification of "cavernous angiomas" and propose a synthetic clinical approach by combining the embryological, histological, evolutive and radiographic features of these lesions. 相似文献
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Akeb F Ferrua B Creminon C Roptin C Grassi J Nevers MC Guedj R Garraffo R Duval D 《Journal of immunological methods》2002,263(1-2):1-9
The HIV protease inhibitor ritonavir (Norvir; ABT-578), currently used in combination with nucleoside analogs and other protease inhibitors in anti-HIV therapy, has previously been quantified by an HPLC procedure. Here, we report the first convenient one-step competitive ELISA for measuring plasma and intracellular ritonavir in HIV patients. Anti-ritonavir antibody was raised in rabbits using ritonavir-KLH conjugate as immunogen, and the enzymatic tracer was prepared by coupling the drug to acetylcholine esterase. Samples for analysis were first extracted with methanol. Bound/free separation was achieved in a microtiter plate previously coated with anti rabbit IgG monoclonal antibody. Fifty percent inhibition was observed at 1 ng/ml ritonavir and the method accurately and specifically detected as little as 3-4 ng/ml of plasma ritonavir as well as intracellular drug in the peripheral blood mononuclear cells of patients undergoing ritonavir therapy. Within-run and day to day coefficients of variation were below 10% and the drugs currently used in HIV therapy did not interfere with the test. The ELISA was applied to the measurement of plasma ritonavir and to the determination of the extracellular/intracellular drug level ratios in HIV patients receiving long-term multidrug therapy. 相似文献
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Rodolphe Thiébaut Jérémie Guedj Hélène Jacqmin-Gadda Geneviève Chêne Pascale Trimoulet Didier Neau Daniel Commenges 《BMC medical research methodology》2006,6(1):38-9
Background
Mathematical models are widely used for studying the dynamic of infectious agents such as hepatitis C virus (HCV). Most often, model parameters are estimated using standard least-square procedures for each individual. Hierarchical models have been proposed in such applications. However, another issue is the left-censoring (undetectable values) of plasma viral load due to the lack of sensitivity of assays used for quantification. A method is proposed to take into account left-censored values for estimating parameters of non linear mixed models and its impact is demonstrated through a simulation study and an actual clinical trial of anti-HCV drugs. 相似文献5.
Maciej Cabanski Brett Fields Stephanie Boue Natalia Boukharov Hector DeLeon Natalie Dror Marcel Geertz Emmanuel Guedj Anita Iskandar Ulrike Kogel Celine Merg Michael J. Peck Carine Poussin Walter K. Schlage Marja Talikka Nikolai V. Ivanov Julia Hoeng Manuel C. Peitsch 《Inflammation research》2015,64(7):471-486
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Vernochet C Azoulay S Duval D Guedj R Ailhaud G Dani C 《AIDS (London, England)》2003,17(15):2177-2180
OBJECTIVES: Lipodystrophy is a major side effect of HIV protease inhibitor (PI) antiretroviral therapy. It has been shown that protease inhibitors interfere in vitro with adipocyte differentiation. However, there is no evidence that PIs accumulate into preadipocytes and adipocytes and that intra-cellular accumulation is sufficient to alter differentiation. We assessed the effect of six different PIs on the differentiation of cells from four clonal lines. We also studied the capacity of ritonavir to accumulate both into drug-sensitive and drug-resistant cultured adipocytes. METHODS: Adipocyte differentiation of mouse 3T3-F442A, 3T3-L1 and Ob1771 cells as well as embryonic stem cells were investigated at pharmacological concentrations of indinavir, saquinavir, ritonavir, amprenavir, nelfinavir and lopinavir. We used a sensitive ELISA to determine intracellular concentration of ritonavir from 3T3-L1 and Ob1771 preadipocytes. RESULTS: Nelfinavir and lopinavir inhibited adipocyte differentiation whereas amprenavir was ineffective. Indinavir, saquinavir and ritonavir inhibited differentiation of 3T3-L1 and 3T3-F442A cells but did not alter differentiation of either Ob1771 or embryonic stem cells. We showed that ritonavir accumulated in preadipocytes and fully differentiated 3T3-L1 adipocytes as a function of its extracellular concentration. Although Ob1771 cells were resistant and 3T3-L1 cells were sensitive to ritonavir, the drug accumulated to similar levels in both cases. CONCLUSIONS: Protease inhibitors inhibit adipocyte differentiation depending on the cell model used. We showed for the first time that ritonavir accumulates into preadipocytes and adipocytes, suggesting a direct effect on intracellular targets. However, intracellular accumulation was clearly not sufficient as Ob1771 cells remained resistant to the inhibitory effect of ritonavir. 相似文献
8.
The fetal brain transcriptome and neonatal behavioral phenotype in the Ts1Cje mouse model of Down syndrome
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Usefulness of 2‐[18F]‐fluoro‐2‐deoxy‐d‐glucose–Positron Emission Tomography/Computed Tomography for Staging and Evaluation of Treatment Response in IgG4‐Related Disease: A Retrospective Multicenter Study
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Mikael Ebbo Aurélie Grados Eric Guedj Delphine Gobert Cécile Colavolpe Mohamad Zaidan Agathe Masseau Fanny Bernard Jean‐Marie Berthelot Nathalie Morel François Lifermann Sylvain Palat Julien Haroche Xavier Mariette Bertrand Godeau Emmanuelle Bernit Nathalie Costedoat‐Chalumeau Thomas Papo Mohamed Hamidou Jean‐Robert Harlé Nicolas Schleinitz 《Arthritis care & research》2014,66(1):86-96
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