1,893 results match your criteria: "Universite de Picardie Jules Verne[Affiliation]"

Rhamnolipids (RLs) and Fengycins (FGs) are biosurfactants with very promising antifungal properties proposed to reduce the use of synthetic pesticides in crops. They are amphiphilic molecules, both known to target the plasma membrane. They act differently on Botrytis cinerea and Sclerotinia sclerotiorum, two close Sclerotiniaceae phytopathogenic fungi.

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Improved Interfacial Electron Dynamics with Block Poly(4-vinylpyridine)-Poly(styrene) Polymers for Efficient and Long-Lasting Dye-Sensitized Solar Cells.

ACS Appl Polym Mater

August 2024

LEPABE, Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.

Dye-sensitized solar cells (DSSCs) have recently entered the market for indoor photovoltaics. Fast electron injection from dye to titania, the lifetime of the excited dye, and the suppression of back electron recombination at the photoanode/electrolyte interface are crucial for a high photocurrent conversion efficiency (PCE). This study presents block copolymers of poly(4-vinylpyridine) and poly(styrene)-P4VP--PSt as efficient accelerators of electron injection from dye to titania with extended lifetime excited states and long-lasting back electron recombination suppression.

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Gabon has a rich flora, many species of which are used in traditional medicine. However, little research has been carried out on this wealth. An ethnopharmacological survey in the Fang language was carried out among traditional practitioners to collect antimicrobial medicinal plants.

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is a root parasitic plant fully dependent on host plants for nutrition and development. Upon germination, the parasitic seedling develops inside the infected roots a specific organ, the haustorium, thanks to the cell wall-degrading enzymes of haustorial intrusive cells, and induces modifications in the host's cell walls. The model plant is susceptible to ; thus, mutants in cell wall metabolism, particularly those involved in pectin remodeling, like , are of interest in studying the involvement of cell wall-degrading enzymes in the establishment of plant-plant interactions.

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Aminopyridines in the development of drug candidates against protozoan neglected tropical diseases.

Future Med Chem

July 2024

Université de Picardie-Jules-Verne, AGIR - Agents infectieux, RéSistance et chimiothérapie, UR 4294, UFR de pharmacie, 1, Rue des Louvels, F-80037 Amiens cedex 1, France.

Neglected tropical diseases (NTDs) pose a major threat in tropical zones for impoverished populations. Difficulty of access, adverse effects or low efficacy limit the use of current therapeutic options. Therefore, development of new drugs against NTDs is a necessity.

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Allergic diseases (ADs) are a major concern when it comes to public well-being. Lam is a tropical plant that is used in traditional medicine due to the presence of isothiocyanate. The present study investigated the antiallergic properties of 4-(-L-rhamnopyranosyloxy)-benzyl isothiocyanate or moringin isolated from seeds in the form of alpha-cyclodextrin-moringin (-CD/MG) complex on rat basophilic leukaemia (RBL-2H3) cell line at both the early and late stages of an allergic reaction.

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Article Synopsis
  • The study compares patients with degenerative mitral regurgitation (DMR) from Asian institutions (AsIs) and European/American institutions (EAIs) to understand differences in their presentation, management, and outcomes.
  • AsI patients were generally younger, had fewer symptoms, and presented with smaller heart dimensions, yet underwent fewer interventions and experienced higher mortality rates compared to EAI patients.
  • The findings suggest that imaging may not accurately reflect the severity of DMR in AsI patients due to their smaller body size, indicating a potential issue with under-treatment in this population.
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  • Severe Alcoholic Hepatitis (sAH) is a liver condition resulting from long-term heavy drinking, and corticosteroids are the main treatment option.
  • A study at Amiens University Hospital analyzed gut microbiota in 27 sAH patients before and after a 7-day corticosteroid treatment, finding no significant changes in microbiota composition or SCFA levels.
  • While the gut microbiota remained stable, the study noted a reduction in certain bile acid ratios and LBP levels in serum, suggesting potential improvements in gut barrier function and implications for future treatments targeting gut microbiota.
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  • The BK polyomavirus (BKPyV) typically causes no symptoms in healthy adults but can lead to serious health issues like nephropathies and hemorrhagic cystitis in immunocompromised patients, particularly those with organ transplants.
  • Recent research shows that BKPyV can use extracellular vesicles to move between cells without causing cell damage, which is a unique strategy for virus entry and exit.
  • The study looked into whether BKPyV uses certain viral protein domains to assist in this vesicle trafficking, finding that while a specific domain in the VP1 protein doesn't aid in vesicle association, it's critical for proper viral particle assembly.
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Copper-containing materials are attracting attention as self-disinfecting surfaces, suitable for helping healthcare settings in reducing healthcare-associated infections. However, the impact of repeated exposure to disinfectants frequently used in biocleaning protocols on their antibacterial activity remains insufficiently characterized. This study aimed at evaluating the antibacterial efficiency of copper (positive control), a brass alloy (AB+) and stainless steel (negative control) after repeated exposure to a quaternary ammonium compound and/or a mix of peracetic acid/hydrogen peroxide routinely used in healthcare settings.

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Background/aim: How tumors regulate the genes of the coagulome is crucial for cancer-associated thrombosis and the occurrence of venous thromboembolic complications in patients with cancer. We have previously reported potent yet complex effects of glucocorticoids (GC) on the expression of three genes that play a key role in the regulation of thrombin/plasmin activation (F3, PLAU, and SERPINE1). This study aimed to extend the investigation of GC effects to the whole tumor coagulome and assess the resulting impact on the ability of cancer cells to activate thrombin and plasmin.

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Understanding structure-property relationship in redox-active molecular species is of central importance in various fields, including many medicinal and chemical applications. The quest for performant organic electrodes in the context of energy storage calls for pioneering studies to develop new and possibly optimal materials. Beyond modifying the molecular design of the existing compounds through functionalization, expansion of the search enabling the advent of efficient new backbones can potentially lead to breakthroughs in this research area.

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Exposure to pesticides, persistent and non - persistent pollutants in French 3.5-year-old children: Findings from comprehensive hair analysis in the ELFE national birth cohort.

Environ Int

August 2024

Unité Toxicologie Expérimentale et Modélisation, Ineris, Institut National de l'Environnement Industriel et des Risques, Verneuil-en-Halatte, France; PériTox, UMR_I 01, CURS, Université de Picardie Jules Verne, Chemin du Thil, Amiens, France. Electronic address:

Introduction: Exposure to endocrine disruptors during early childhood poses significant health risks. This study examines the exposure levels of French 3.5-year-old children to various persistent and non-persistent pollutants and pesticides using hair analysis as part of the ELFE national birth cohort.

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Discovery of BI-9508, a Brain-Penetrant GPR88-Receptor-Agonist Tool Compound for Mouse Studies.

J Med Chem

July 2024

Boehringer Ingelheim Pharma GmbH & Co. KG, 88397 Biberach an der Riß, Germany.

Decreased activity and expression of the G-protein coupled receptor GPR88 is linked to many behavior-linked neurological disorders. Published preclinical GPR88 allosteric agonists all have pharmacokinetic properties that preclude their progression to the clinic, including high lipophilicity and poor brain penetration. Here, we describe our attempts to improve GPR88 agonists' drug-like properties and our analysis of the trade-offs required to successfully target GPR88's allosteric pocket.

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Carboxymethyl β-Cyclodextrin Assistance for the 4-Nitrophenol Reduction Using Cobalt-Based Layered Double Hydroxides.

Int J Mol Sci

June 2024

Unité de Catalyse et Chimie du Solide (UCCS), UMR 8181, Université de Lille, CNRS, Centrale Lille, Université d'Artois, rue Jean Souvraz, SP 18, 62300 Lens, France.

Cobalt-aluminum-layered double hydroxides containing carboxymethyl β-cyclodextrin (CMβCD) were synthesized by coprecipitation and evaluated as a cobalt source for the 4-nitrophenol reduction in an aqueous medium. Several physicochemical techniques (XRD, FTIR, TGA) indicated the intercalation of the anionic cyclodextrin without damages to the hydrotalcite-type structure. These lamellar cobalt-aluminum hybrid materials (CoAl_CMβCD) were evaluated in the 4-nitrophenol reduction and showed higher activities in comparison with the CMβCD-free standard material (CoAl_CO).

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Article Synopsis
  • * Researchers utilized a ligand-fishing technique with immobilized 3CL protease on magnetic beads, which allowed them to identify and isolate active peptides that further enhanced inhibition to 82.7%.
  • * Molecular simulations and additional testing revealed that four out of seven identified peptides were effective at inhibiting the 3CL protease, indicating the potential of these seaweed-derived peptides as antiviral agents against COVID-19.
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Effects of microplastics on the kidneys: a narrative review.

Kidney Int

September 2024

Centro de Tecnologia da Informação (CTI) Renato Archer, Campinas - São Paulo, Brazil.

Article Synopsis
  • * These particles have been detected in human fluids and tissues, indicating potential exposure through ingestion, inhalation, or skin contact, which might cause health issues like inflammation and organ dysfunction.
  • * The article aims to review how MPs are generated, their detection methods, known toxic effects, and specifically analyze research on their impact on kidney disease, highlighting the need for further studies in this area.
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Oxycodone or Higher Dose of Levodopa for the Treatment of Parkinsonian Central Pain: OXYDOPA Trial.

Mov Disord

September 2024

Department of Clinical Pharmacology and Neurosciences, Parkinson Expert Centre, Centre d'Investigation Clinique CIC1436, University Hospital of Toulouse, NeuroToul COEN Centre, NS-PARK/FCRIN Network, Toulouse, France.

Background: Among the different types of pain related to Parkinson's disease (PD), parkinsonian central pain (PCP) is the most disabling.

Objectives: We investigated the analgesic efficacy of two therapeutic strategies (opioid with oxycodone- prolonged-release (PR) and higher dose of levodopa/benserazide) compared with placebo in patients with PCP.

Methods: OXYDOPA was a randomized, double-blind, double-dummy, placebo-controlled, multicenter parallel-group trial run at 15 centers within the French NS-Park network.

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Measuring honey bee feeding rhythms with the BeeBox, a platform for nectar foraging insects.

Physiol Behav

September 2024

Sorbonne Université, INRAE, Université Paris Est Créteil, CNRS, IRD - Institute for Ecology and Environnemental Sciences of Paris, iEES Paris, 78026, Versailles, France.

In honey bees, most studies of circadian rhythms involve a locomotion test performed in a small tube, a tunnel, or at the hive entrance. However, despite feeding playing an important role in honey bee health or fitness, no demonstration of circadian rhythm on feeding has been performed until recently. Here, we present the BeeBox, a new laboratory platform for bees based on the concept of the Skinner box, which dispenses discrete controlled amounts of food (sucrose syrup) following entrance into an artificial flower.

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European validation of the classification for the anticipated difficulty of liver transplantation.

HPB (Oxford)

August 2024

Department of Digestive, Hepato-Biliary and Pancreatic Surgery and Liver Transplantation, AP-HP Pitié-Salpêtrière Hospital, Paris, France; Sorbonne Université, Paris, France; Centre de Recherche de Saint-Antoine (CRSA), INSERM, UMRS-938, Paris, France. Electronic address:

Background: Appropriate risk stratification for the difficulty of liver transplantation (LT) is essential to guide the selection and acceptance of grafts and avoid morbidity and mortality.

Methods: Based on 987 LTs collected from 5 centers, perioperative outcomes were analyzed across the 3 difficulty levels. Each LT was retrospectively scored from 0 to 10.

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Two series of sugar esters with alkyl chain lengths varying from 5 to 12 carbon atoms, and with a head group consisting of glucose or galactose moieties, were synthesized. Equilibrium surface tension isotherms were measured, yielding critical micellar concentration (CMC) surface tensions at CMC (γcmc) and minimum areas at the air-water interface (Amin). In addition, Krafft temperatures (Tks) were measured to characterize the ability of molecules to dissolve in water, which is essential in numerous applications.

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While previous research has suggested that prospective memory may be enhanced by providing a social motive (i.e., social importance) or by promising a monetary reward for successful performance, to the best of our knowledge, the underlying mechanisms responsible for these effects are still largely unexplored.

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This manuscript reports the complete and circularized Oxford Nanopore Technologies (ONT) long read-based genome sequences of five nitrogen-fixing symbionts belonging to the genus , isolated from root nodules of peanut () grown on soil samples collected from Tunisia.

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Background: Both vedolizumab and ustekinumab can be considered for the treatment of ulcerative colitis [UC], but head-to-head trials are lacking.

Aim: We aimed to compare the effectiveness of vedolizumab and ustekinumab after anti-tumour necrosis factor [anti-TNF] failure in UC patients.

Patients And Methods: In this multicentre study, we included consecutive adult patients with UC, with partial Mayo score >2 and prior anti-TNF exposure, treated with vedolizumab or ustekinumab between January 2019 and August 2022.

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Polymer-stabilised liquid crystals (PSLCs) have recently been used to maintain the focal conic domains (FCDs) typical of the smectic A phase in the nematic phase for smart window applications. The newly discovered twist-bend nematic phase of bent-shaped dimers also exhibits FCDs due to its pseudo-layered structure. The variety of topological defects in the N phase is arguably even greater than in the smectic A phase, but the N phase is often metastable and usually crystallises at room temperature, which hinders its use in electro-optical applications.

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