1,405 results match your criteria: "CNRS-Université Toulouse 3[Affiliation]"

Cu-Zeolite Catalysis for Biaryl Synthesis via Homocoupling Reactions of Phenols or Aryl Boronic Acids.

Molecules

November 2024

Catalyse Organométallique, Synthèse Organique et Santé (COSyS), Institut de Chimie (UMR-CNRS 7177), Université de Strasbourg, 67000 Strasbourg, France.

Due to the importance of biaryls as natural products, drugs, agrochemicals, dyes, or organic electronic materials, a green alternative biaryl synthesis has been developed based on easy-to-prepare and cheap copper(I)-exchanged zeolite catalysts. Cu-USY proved to efficiently catalyze the direct homocoupling of either phenols or aryl boronic acids under simple and practical conditions. The Cu-USY-catalyzed oxidative homocoupling of phenols could conveniently be performed under air either in warm methanol or water with good to high yields.

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Evaluation of the toxic effects of food additives, alone or in mixture, in four human cell models.

Food Chem Toxicol

December 2024

Toxalim, INRAE, INP-ENVT, INP-EI-Purpan, Université de Toulouse 3 Paul Sabatier, Toulouse, France; Nutrition And Cancer Research Network (NACRe Network), France. Electronic address:

Food additives are present in more than 50% of food products. Several studies have suggested a link between the consumption of certain food additives and an increased risk of developing cancer. This study aimed to evaluate the genotoxicity of 32 additives and six mixtures identified by the NutriNet-Santé cohort as the most widely consumed.

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Genomic and ancient DNA data have revolutionized palaeoanthropology and our vision of human evolution, with indisputable landmarks like the sequencing of Neanderthal and Denisovan genomes. Yet, using genetic data to identify, date and quantify evolutionary events-such as ancient bottlenecks or admixture-is not straightforward, as inferences may depend on model assumptions. In the last two decades, the idea that Neanderthals and members of the Homo sapiens lineage interbred has gained momentum.

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How to distinguish spinocerebellar ataxia 27B from late onset cerebellar ataxia: insights from a case-control study.

J Neurol

December 2024

Neurology Department University Hospital of Toulouse, Clinical Investigation Center CIC 1436, Parkinson Expert Centre, NeuroToul Center of Excellence in Neurodegeneration (COEN) of Toulouse, CHU of Toulouse, Inserm, University of Toulouse 3, Toulouse, France.

Background: Spinocerebellar ataxia 27B is the most common genetic late onset cerebellar ataxia (LOCA). However, it commonly overlaps with other genetic LOCA as with the cerebellar form of multiple system atrophy (MSA-C).

Objectives: To pinpoint which clinical signs and symptoms best discriminate between FGF14 + from FGF14 - patients at symptoms' onset.

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Evolving Strategies in the Management of Transplant-Eligible Patients with Newly Diagnosed Multiple Myeloma.

Presse Med

December 2024

Service d'Hematologie, CHU de Toulouse - IUCT Oncopole, Université UPS Toulouse 3, Toulouse, France. Electronic address:

Multiple myeloma treatment has evolved significantly with the introduction of triplet and quadruplet regimens, notably incorporating anti-CD38 antibodies. While autologous stem cell transplantation remains a cornerstone of therapy, its role in the context of increasingly effective upfront treatments is debated. Current guidelines still recommend transplant for all eligible patients, especially those with high-risk features at diagnosis, despite concerns regarding the lack of overall survival benefits and the potential long-term toxicities associated with high-dose melphalan.

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Background: The reported massive decline of arthropods and particularly of pollinators such as wild bees, in terms of abundance and richness, is a threat for crop production and wild plant biodiversity conservation. This decline is mainly explained by a combination of drivers at local- and landscape-scale related to intensive farming practices. Assessing the evolution of wild bee communities in agricultural ecosystems and their response to such practices is needed to address conservation purposes.

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Introduction: Adolescents face unique challenges in accessing appropriate information and services regarding sexuality and reproductive health (SRH). This poor access can lead to sexual behaviours that could put them at risk of unintended pregnancies and sexually transmitted infections. Adolescents living with HIV (ALHIV) have specific SRH needs that remain unmet.

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Digital Outcomes as Biomarkers of Disease Progression in Early Parkinson's Disease: A Systematic Review.

Mov Disord

November 2024

Department of Neurosciences, Clinical Investigation Center CIC 1436, Parkinson Toulouse Expert Centre, NS-Park/FCRIN Network and NeuroToul COEN Center, Toulouse University Hospital, INSERM, University of Toulouse 3, Toulouse, France.

Outcomes derived from digital health technologies (DHTs) are promising candidate markers for monitoring Parkinson's disease (PD) progression. They have the potential to represent a significant shift in clinical research and therapeutic development in PD. However, their ability to track disease progression is yet to be established.

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Fluopyram SDHI pesticide alters fish physiology and behaviour despite low in vitro effects on mitochondria.

Ecotoxicol Environ Saf

December 2024

Centre de Recherche sur la Biodiversité et l'Environnement (CRBE), Université de Toulouse, CNRS, IRD, Toulouse INP, Université Toulouse 3 - Paul Sabatier (UT3), Toulouse, France.

Pollution from pesticides is an increasing concern for human health and biodiversity conservation. However, there is lack of knowledge about some emerging molecules such as SDHI fungicides (succinate dehydrogenase inhibitors) that are widely used but potentially highly toxic for vertebrates. Boscalid, fluopyram, and bixafen are 3 frequent SDHI molecules commonly detected in surface waters, which may pose risks to aquatic species.

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Unlabelled: This phase 2 study investigated pevonedistat + azacitidine + venetoclax ( = 83) versus azacitidine + venetoclax ( = 81) in patients with newly diagnosed acute myeloid leukemia (AML) ineligible for intensive chemotherapy. The study was stopped early following negative results from PANTHER, which evaluated pevonedistat in higher-risk myelodysplastic syndromes/chronic myelomonocytic leukemia or low-blast AML. Outcomes were analyzed up to the datacut.

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Medium term hydrochemical and CO responses to anthropogenic and environmental changes in karst headwater streams.

Sci Total Environ

December 2024

Centre de Recherche sur la Biodiversité et l'Environnement (CRBE), Université de Toulouse, CNRS, IRD, Toulouse INP, Université Toulouse 3 - Paul Sabatier (UT3), Toulouse, France; LTER Bassin versant du Baget, SNO Karst, IR OZCAR, CNRS, University of Toulouse, France; LTSER Zone Atelier Pyrenees-Garonne, CNRS, University of Toulouse, France. Electronic address:

This study investigates the intricate effects of lithology, temperature, discharge, and land use changes on headwater stream chemistry by analysing two decades of hydrochemical data from twenty karst headwater catchments in the Garonne River basin, France. Focused on the Pyrenees and the lowland (LM) and upland (UM) regions of the Massif Central, this study identified significant regional variations and commonalities in water chemistry. The headwater streams were clustered based on their hydrological and hydrochemical profiles, revealing strong similarities between upland sites, i.

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An in-situ experiment was conducted in a young mangrove with no history of oil contamination (French Guiana). Control and oil-contaminated sediments were sampled one month after exposure and analyzed to a depth of 18 cm to assess natural oil depletion and changes in benthic communities. High biodegradation percentages (89-99 %) of n-alkanes and polycyclic aromatic hydrocarbons were measured.

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Sea level rise and the evolution of aggression on islands.

iScience

November 2024

Maastricht Science Programme, Faculty of Science and Engineering, University of Maastricht, P.O. Box 616, Maastricht 6200 MD, The Netherlands.

Why aggressive traits evolve in some species but not in others is poorly understood. We modeled the population dynamics of the extinct Mauritius dodo and Rodrigues solitaire to examine divergent pathways in the evolution of aggression. Whereas the dodo conformed to island syndrome predictions of tameness, its sister-taxon the solitaire evolved strong sexual dimorphism and aggressive traits.

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Adaptive trade-offs between vertebrate defence and insect predation drive Amazonian ant venom evolution.

Proc Biol Sci

November 2024

INRAE, UMR Ecologie des forêts de Guyane - EcoFoG (AgroParisTech, CIRAD, CNRS, Université de Guyane, Université des Antilles), Campus Agronomique, BP 316, Kourou Cedex 97379, France.

Stinging ants have diversified into various ecological niches, and selective pressures may have contributed to shape the composition of their venom. To explore the drivers underlying venom variation in ants, we sampled 15 South American rainforest species and recorded a range of traits, including ecology, morphology and venom bioactivities. Principal component analysis of both morphological and venom bioactivity traits reveals that stinging ants display two functional strategies where species have evolved towards either an exclusively offensive venom or a multi-functional venom.

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SNX17 Regulates Antigen Internalisation and Phagosomal Maturation by Dendritic Cells.

Immunology

January 2025

Instituto de Histología y Embriología de Mendoza (IHEM), Universidad Nacional de Cuyo, CONICET, Mendoza, Argentina.

Antigen cross-presentation is the process whereby small peptides derived from exogenous antigens are attached to MHC-I molecules triggering CD8+ T lymphocyte activation. The endocytic route of dendritic cells (DCs) is highly specialised for cross-presentation to initiate cytotoxic immune responses against numerous intracellular pathogens and tumours. In this study, we identify the endosomal protein sorting nexin (SNX) 17 as a key regulator of antigen internalisation and cross-presentation by DCs.

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Linking leaf dark respiration to leaf traits and reflectance spectroscopy across diverse forest types.

New Phytol

November 2024

State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Xiangshan, Beijing, 100093, China.

Article Synopsis
  • Leaf dark respiration (R) is crucial for carbon cycling in forests but is often not quantified properly; this study examined how R relates to various leaf traits like maximum carboxylation capacity (V) across different forest types in China.
  • The research found that leaf magnesium and calcium concentrations are more relevant for explaining R variability than more common traits like leaf mass per area (LMA) and nitrogen (N) concentrations, but the relationships are generally weak and specific to each forest type.
  • Leaf spectroscopy proved to be a more effective method for predicting R compared to traditional trait relationships, revealing new traits with broader applicability and suggesting that spectroscopy could enhance models of plant respiration.
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Purpose: Whether skin disinfection of the surgical site using chlorhexidine-alcohol is superior to povidone-iodine-alcohol in reducing reoperation and surgical site infection rates after major cardiac surgery remains unclear.

Methods: CLEAN 2 was a multicenter, open-label, randomized, two-arm, assessor-blind, superiority trial conducted in eight French hospitals. We randomly assigned adult patients undergoing major heart or aortic surgery via sternotomy, with or without saphenous vein or radial artery harvesting, to have all surgical sites disinfected with either 2% chlorhexidine-alcohol or 5% povidone-iodine-alcohol.

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[French internal medicine is at a turning point in its history. Summary of the 2024 French Internal Medicine meeting].

Rev Med Interne

November 2024

Service de médecine interne, centre de référence maladies auto-immunes et auto-inflammatoires systémiques rares d'Île-de-France, de l'Est et de l'Ouest, hôpital Cochin, université Paris-Cité, AP-HP, Paris, France; Inserm UMRS 1138, centre de recherche des cordeliers, université Paris-Cité, Paris, France.

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Impact of a multifaceted antibiotic stewardship programme in a paediatric acute care unit over 8 years.

JAC Antimicrob Resist

December 2024

Division of Pediatric Infectious Diseases, Department for Women's and Children's Health, University of Padua, Via Giustiniani 3, 35128 Padua, Italy.

Background: Antibiotics are the most prescribed drugs for children worldwide, but overuse and misuse have led to an increase in antibiotic resistance. Antimicrobial stewardship programmes (ASPs) have proven feasible in reducing inappropriate antimicrobial use. The study aimed at evaluating the impact and sustainability of an ASP with multiple interventions over 8 years.

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Development of a new digital sexual health assessment tool to help patients better understand the factors involved in their sexual disorders - "The Sexual Dysfunction Evaluation Tool" (SEXDET).

Fr J Urol

October 2024

UMR DEFE "Développement Embryonnaire Fertilité Environnement", 1203 Inserm, Université de Toulouse 3, Université de Montpellier, 31059 Toulouse, France; BAU International University Batumi, 237, Fridon Khalvashi ST, Batumi, Georgia.

Introduction: A visual digital tool called SEXual Dysfunction Evaluation Tool (SEX-DET) was created for assessing the causes of sexual dysfunction, based on a biopsychosocialsexual and relational schema, to assist patients in understanding the relative influence of the various factors contributing to their sexual dysfunction. The aim of this study was to evaluate satisfaction of this tool in sexual dysfunction patients and practitioners.

Methods: A satisfaction study of the SEX-DET was performed in 50 patients (20 F, 30 M) consulting for a sexual trouble and 3 practitioners.

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Landscape heterogeneity is known as a major factor of community structure and composition. Whether this effect of the landscape extends at different scales and particularly at the relevant scale for microorganisms remained to be determined. We used the cases produced by aquatic larvae of Trichoptera, which assemble organic or mineral particles, as naturally replicated experimental systems representing structured substrates to determine the effect of landscape structuration on microbial communities.

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Luminescence (nano)thermometry has exploded in popularity, offering a remote detection way to measure temperature across diverse fields like nanomedicine, microelectronics, catalysis, and plasmonics. A key advantage is its supposed immunity to strong electromagnetic fields, a crucial feature in many environments. However, this assumption lacks comprehensive experimental verification as most of the proposed luminescent thermometers rely on magnetic ions, such as lanthanides.

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Article Synopsis
  • - The study aimed to analyze antibiotic prescribing practices for children under 5 in West African countries using the WHO AWaRe classification, covering data from 15,854 outpatient visits at public primary health centers.
  • - Results showed high rates of antibiotic prescriptions among neonates and young infants, with percentages ranging from 59% to 83% across Burkina Faso, Guinea, Mali, and Niger, and about 93% of prescribed antibiotics being first-choice treatments, mainly amoxicillin.
  • - Conclusions indicate that while high numbers of antibiotics were prescribed, the appropriateness of these prescriptions—and the potential need for further evaluation—remains important, with a minimum threshold of 60% met for the recommended categories in each country. *
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