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101.
Daniel Bertin Jean-Charles Grimaud Nathalie Lesavre Chahine Benelmouloud Ariadne Desjeux Stéphane Garcia Sophie Desplat-Jégo 《PloS one》2013,8(11)
Antibodies against Saccharomyces cerevisiae (ASCA) and Escherichia coli outer membrane porin C (anti-OmpC) are known to be detectable in the serum of patients with Crohn’s disease (CD) but display a very poor sensitivity for the disease especially in forms with isolated colonic involvement. In this study we aimed at evaluating performances of these markers in supernatant of cultured colonic biopsies.Patients with colonic CD (n = 67), ulcerative colitis (UC) (n = 35) and control individuals (n = 37) were prospectively recruited for colonoscopy pinch biopsies and blood sampling. Serum and supernatant of culture tissues were analyzed for ASCA and anti-OmpC. Direct immunofluorescence was also performed on colonic tissues for total IgA detection.We detected for the first time ASCA IgA/IgG and anti-OmpC IgA in cultured colonic tissue supernatants. For both markers, sensitivities for diagnosing CD were better in supernatants (ASCA: 53.7%, anti-OmpC: 28.4%) than in serum (ASCA: 31.3%, anti-OmpC: 22.4%). Combination of results from a panel of these tests gave the greatest sensitivity ever described for CD diagnosis in colonic forms (70.2%).In this study, we described, for the first time, ASCA in supernatant of colonic tissue cultures. This assaying approach in CD diagnosis should be taken into consideration in the future especially in CD forms with isolated colonic involvement. 相似文献
102.
103.
Intraperitoneal administration of the mycotoxin penitrem A 30 min before a training session in passive avoidance task, impaired
performance of rats subjected to a test-session 24 h after. This effect was not antagonised by pretraining administration
of physostigmine or bicuculline. Administration of penitrem A 20 min before a training session or 30 min before a test-session
did not impair performance. In the Morris water maze, doses of penitrem A that induces slight to moderate tremors, but not
a lower dose, disrupted place learning. These results suggest that penitrem A disrupts the processes that take place at the
time of acquisition, but not those just after acquisition, and does not alter the restitution of information. This effect
would not be related to a decrease of cholinergic neurotransmission nor to a stimulation of GABA A receptors. Nevertheless,
it could not be totally excluded that the performance impairments induced by penitrem A would be secondary to a motor disruption.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
104.
Naram El-Akra Arielle Noirot Jean-Charles Faye Jean-Pierre Souchard 《Photochemical & photobiological sciences》2006,5(11):996-999
The synthesis, physico-chemical properties, cellular localization and photocytotoxicity of estradiol-pheophorbide a conjugates in estrogen-dependent cancer and vascular endothelial cells are described with the aim of increasing the photodynamic activity by targeting the nucleus of both tumor and blood vessel cells. 相似文献
105.
Regulation of Peroxisome Proliferator-Activated Receptor γ Expression by Adipocyte Differentiation and Determination Factor 1/Sterol Regulatory Element Binding Protein 1: Implications for Adipocyte Differentiation and Metabolism 总被引:1,自引:0,他引:1
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106.
Marine?Goffinet Patrick?Chinestra Isabelle?Lajoie-Mazenc Claire?Medale-Giamarchi Gilles?FavreEmail author Jean-Charles?FayeEmail author 《BMC biotechnology》2008,8(1):34
Background
The Rho GTPases A, B and C proteins, members of the Rho family whose activity is regulated by GDP/GTP cycling, function in many cellular pathways controlling proliferation and have recently been implicated in tumorigenesis. Although overexpression of Rho GTPases has been correlated with tumorigenesis, only their GTP-bound forms are able to activate the signalling pathways implicated in tumorigenesis. Thus, the focus of much recent research has been to identify biological tools capable of quantifying the level of cellular GTP-bound Rho, or determining the subcellular location of activation. However useful, these tools used to study the mechanism of Rho activation still have limitations. The aim of the present work was to employ phage display to identify a conformationally-specific single chain fragment variable (scFv) that recognizes the active, GTP-bound, form of Rho GTPases and is able to discriminate it from the inactive, GDP-bound, Rho in endogenous settings. 相似文献107.
108.
109.
Alexandre Hainard Natalia Tiberti Xavier Robin Veerle Lejon Dieudonné Mumba Ngoyi Enock Matovu John Charles Enyaru Catherine Fouda Joseph Mathu Ndung'u Frédérique Lisacek Markus Müller Natacha Turck Jean-Charles Sanchez 《PLoS neglected tropical diseases》2009,3(6)
Background
Human African trypanosomiasis (HAT), also known as sleeping sickness, is a parasitic tropical disease. It progresses from the first, haemolymphatic stage to a neurological second stage due to invasion of parasites into the central nervous system (CNS). As treatment depends on the stage of disease, there is a critical need for tools that efficiently discriminate the two stages of HAT. We hypothesized that markers of brain damage discovered by proteomic strategies and inflammation-related proteins could individually or in combination indicate the CNS invasion by the parasite.Methods
Cerebrospinal fluid (CSF) originated from parasitologically confirmed Trypanosoma brucei gambiense patients. Patients were staged on the basis of CSF white blood cell (WBC) count and presence of parasites in CSF. One hundred samples were analysed: 21 from stage 1 (no trypanosomes in CSF and ≤5 WBC/µL) and 79 from stage 2 (trypanosomes in CSF and/or >5 WBC/µL) patients. The concentration of H-FABP, GSTP-1 and S100β in CSF was measured by ELISA. The levels of thirteen inflammation-related proteins (IL-1ra, IL-1β, IL-6, IL-9, IL-10, G-CSF, VEGF, IFN-γ, TNF-α, CCL2, CCL4, CXCL8 and CXCL10) were determined by bead suspension arrays.Results
CXCL10 most accurately distinguished stage 1 and stage 2 patients, with a sensitivity of 84% and specificity of 100%. Rule Induction Like (RIL) analysis defined a panel characterized by CXCL10, CXCL8 and H-FABP that improved the detection of stage 2 patients to 97% sensitivity and 100% specificity.Conclusion
This study highlights the value of CXCL10 as a single biomarker for staging T. b. gambiense-infected HAT patients. Further combination of CXCL10 with H-FABP and CXCL8 results in a panel that efficiently rules in stage 2 HAT patients. As these molecules could potentially be markers of other CNS infections and disorders, these results should be validated in a larger multi-centric cohort including other inflammatory diseases such as cerebral malaria and active tuberculosis. 相似文献110.
Omega-piperidinoalkanamine derivatives with fluorescent moieties (2-cyanoisoindol-1-yl, 7-nitrobenzofurazan-4-yl) have been synthesized starting from piperidine in three steps. The compounds display moderate to good histamine hH(3) receptor affinities with K(i) values ranging from 178 to 11nM. The new compounds may act as tools for identification and understanding of the binding site on the histamine H(3) receptor. 相似文献