16,911 results match your criteria: "France ¶Université Paris Diderot[Affiliation]"

Hepatocellular carcinoma hosts cholinergic neural cells and tumoral hepatocytes harboring targetable muscarinic receptors.

JHEP Rep

January 2025

Hepatitis Viruses and Pathobiology of Chronic Liver Diseases - LabEx DEVweCAN, Inserm U1052, Cancer Research Centre of Lyon - Hepatology Institute of Lyon F - IHU EVEREST, University of Lyon 1, ISPB, France, CNRS UMR5286, Centre Léon, Lyon, France.

Background & Aims: Owing to unexplained interpatient variation and treatment failure in hepatocellular carcinoma (HCC), novel therapeutic approaches remain an urgent clinical need. Hepatic neurons, belonging to the autonomic nervous system (ANS), mediate liver/whole body crosstalk. Pathological innervation of the ANS has been identified in cancer, nurturing tumor stroma and conferring stronger carcinogenic properties.

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The concept of treating diabetes with gut hormones was proposed in the early days of endocrinology (1902), but was not put into practice until the early 2000s. The discovery of the incretin effect (potentiation of insulin secretion when glucose is taken orally compared to intravenously) led to the discovery of the two main gut hormones responsible for this effect: GIP and GLP-1. The reduction of the incretin effect is directly involved in the pathogenesis of type 2 diabetes, which has led to the development of a series of innovative therapies such as GLP-1 analogues, GLP-1 receptor agonists, GIP/GLP-1 co-agonists and GIP/GLP-1/glucagon tri-agonists.

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During meiosis, programmed DNA double-strand breaks (DSBs) are formed by the topoisomerase-like enzyme, Spo11, activating the DNA damage response (DDR) kinase Mec1ATR via the checkpoint clamp loader, Rad24RAD17. At single loci, loss of Mec1 and Rad24 activity alters DSB formation and recombination outcome, but their genome-wide roles have not been examined in detail. Here, we utilise two strategies-deletion of the mismatch repair protein, Msh2, and control of meiotic prophase length via regulation of the Ndt80 transcription factor-to help characterise the roles Mec1 and Rad24 play in meiotic recombination by enabling genome-wide mapping of meiotic progeny.

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Immobility of isolated swarmer cells due to local liquid depletion.

ArXiv

November 2024

Zuckerberg Institute for Water Research, The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus 84990, Midreshet Ben-Gurion, Israel.

Bacterial swarming is a complex phenomenon in which thousands of self-propelled rod-shaped cells move coherently on surfaces, providing an excellent example of active matter. However, bacterial swarming is different from most studied examples of active systems because single isolated cells do not move, while clusters do. The biophysical aspects underlying this behavior are unclear.

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Research Question: To determine whether the use of oral dydrogesterone (DYD) in luteal phase support (LPS) during an artificial cycle provides equivalent clinical and ongoing pregnancy, delivery and miscarriage rates as micronized vaginal progesterone (MVP) in oocyte donation recipients.

Design: This was a retrospective observational study of prospectively collected data from the assisted reproductive technology (ART) Department of Lille University Hospital from July 2018 to July 2022. All recipients underwent endometrial preparation by an artificial cycle.

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FGF21 Signaling Exerts Anti-Fibrotic Properties During Pulmonary Fibrosis.

Am J Respir Crit Care Med

December 2024

Université Paris Cité, Inserm, PHERE, Faculté de Médecine Paris 7, site X. Bichat, Paris, France;

Rationale: Idiopathic Pulmonary Fibrosis (IPF) is a lethal disease with limited therapeutic options. FGF21, an endocrine fibroblast growth factor that acts through the FGFR1/KLB pathway, mitigates liver fibrosis.

Objectives: We hypothesized that FGF21 could exert anti-fibrotic properties in the lung.

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Article Synopsis
  • * SLRs offer advantages like narrower bandwidths and enhanced electric fields compared to LSPs, which are essential for creating efficient optical devices, with grazing diffracted orders playing a key role in their properties.
  • * The study utilizes both experimental and theoretical methods, including simulations of gold disk arrays, to show that SLR characteristics are closely linked to the efficiency of diffracted modes, emphasizing the importance of inter-particle spacing for optimizing performance in photonic applications.
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Tubulin glutamylation regulates axon guidance via the selective tuning of microtubule-severing enzymes.

EMBO J

November 2024

Sorbonne Université, INSERM U1130, CNRS UMR8246, Neuroscience Paris Seine - Institut de Biologie Paris-Seine (NPS-IBPS), Paris, France.

The microtubule cytoskeleton is a major driving force of neuronal circuit development. Fine-tuned remodelling of this network by selective activation of microtubule-regulating proteins, including microtubule-severing enzymes, has emerged as a central process in neuronal wiring. Tubulin posttranslational modifications control both microtubule properties and the activities of their interacting proteins.

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Multiple Endocrine Neoplasia type 1 (MEN1) Clinical Practice Guidelines (2012) are predominantly based on expert opinion due to limited available evidence at the time, leaving room for interpretation and variation in practices. Evidence on the natural course of MEN1-related neuroendocrine tumours (NET) and the value of screening programs has increased and new imaging techniques have emerged. The aim of this study is to provide insight in the current practices of screening and surveillance for MEN1-related NETs in ENETS Centers of Excellence (CoEs).

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3D MR elastography at 0.55 T: Concomitant field effects and feasibility.

Magn Reson Med

November 2024

Research Department of Imaging Physics and Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, UK.

Purpose: To demonstrate the feasibility of hepatic 3D MR elastography (MRE) at 0.55 T in healthy volunteers using Hadamard encoding and to study the effects of concomitant fields in the domain of MRE in general.

Methods: Concomitant field effects in MRE are assessed using a Taylor series expansion and an encoding scheme is proposed to study the corresponding effects on 3D MRE at 0.

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2q33 Deletions Underlying Syndromic and Non-syndromic CTLA4 Deficiency.

J Clin Immunol

November 2024

Study Center for Primary Immunodeficiencies, Necker Hospital for Sick Children, Assistance Publique Hôpitaux de Paris (AP-HP), Paris, EU, France.

Purpose: CTLA4 deficiency is an inborn error of immunity (IEI) due to heterozygosity for germline loss-of-function variants of the CTLA4 gene located on chromosome 2q33.2. CTLA4 deficiency underlies pleiotropic immune and lymphoproliferation-mediated features with incomplete penetrance.

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Objectives: Viscosupplementation with hyaluronic acid (HA) is a commonly used intra-articular treatment for osteoarthritis (OA). We performed a Delphi consensus process to formulate guidelines for the use of intra-articular hyaluronic acid (IAHA) knee injection according to the patient's characteristics.

Methods: The EUROVISCO group consists of 12 members who had expertise in clinical and/or research in the field of OA and IAHA treatment.

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Oncocytic adenocarcinoma (OC) of the salivary glands is a rare and controversial entity. It was recently reclassified as "salivary carcinoma NOS and emerging entities" in the 2022 WHO classification of head and neck tumors. The lack of specific molecular alterations and its potential affiliation with other salivary gland carcinomas, such as the oncocytic mucoepidermoid carcinomas (OMEC) or the oncocytic subtype of salivary duct carcinomas (OSDC) justified this reclassification.

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Article Synopsis
  • - Metabolic dysfunction-associated steatotic liver disease (MASLD) is prevalent among obese individuals and shows differences between sexes. A study sought to create a noninvasive blood test using mid-infrared (MIR) metabolic fingerprinting to diagnose metabolic dysfunction-associated steatohepatitis (MASH) in those with severe obesity.
  • - The study involved 382 patients undergoing bariatric surgery, with liver biopsies assessed to establish a scoring algorithm based on MIR spectroscopy. In women, MASH was diagnosed in 14.3% of cases, showing high sensitivity (86%) and specificity (81%) for correctly identifying the condition.
  • - For men, the test's performance was notably less effective, with a MASH diagnosis
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Hepatitis D Virus Infection Markedly Increases the Risk of Hepatocellular Carcinoma in Patients with Viral B Cirrhosis.

Clin Gastroenterol Hepatol

October 2024

Université Paris-Est Créteil, INSERM, IMRB, CEpiA (Clinical Epidemiology and Ageing Unit) Team, Créteil; AP-HP, Hôpital Henri-Mondor, Unité de Recherche Clinique (URC Mondor), F-94010 Créteil, France; AP-HP, Hôpital Henri-Mondor, Service d'hépatologie, Créteil, France.

Article Synopsis
  • * It includes data from 413 patients (142 HBV-HDV and 271 HBV monoinfected) and finds that those with HBV-HDV are generally younger and experience a significantly higher incidence of HCC over 5 years compared to HBV-only patients.
  • * The results indicate that HDV is an independent risk factor for the development of HCC in patients with cirrhosis, highlighting its important role regardless of HBV
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Morbidity related to major lung thoracoscopic resections in children.

Pediatr Med Chir

October 2024

Department of Pediatric Surgery and Urology, Robert-Debré University Hospital, Paris, France; Paris University, Paris, France; Université Paris Diderot-Sorbonne Paris Cité, Paris.

In pediatric thoracic surgery, reported predictors for increased risk are symptoms and active/previous infections (RAP). We investigated the adverse events related to Video-Assisted Thoracic Surgery (VATS) in pediatric patients when considering RAP predictors. A retrospective analysis of pediatric VATS major lung resections in 2008-2021 was conducted at three institutions.

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Purpose: The use of inotuzumab ozogamicin (InO), a conjugated anti-CD22 monoclonal antibody, is becoming a promising frontline treatment for older patients with ALL.

Patients And Methods: EWALL-INO is an open-label prospective multicenter phase II trial (ClinicalTrials.gov identifier: NCT03249870).

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New Insights on In Vitro Maturation of Oocytes for Fertility Preservation.

Int J Mol Sci

October 2024

Department of Reproductive Medicine and Fertility Preservation, Université Paris-Saclay, Assistance Publique-Hôpitaux de Paris, Antoine Beclère Hospital, 92140 Clamart, France.

In the last decade, the evolution of oncofertility has sparked a resurgence of interest in in vitro maturation (IVM) due to its suitability in certain oncological scenarios where controlled ovarian hyperstimulation may not be feasible. The retrieval of immature cumulus-oocyte complexes from small antral follicles, regardless of the menstrual cycle phase, presents a swift opportunity to vitrify mature oocytes or embryos post-IVM in urgent situations or when stimulation is not advisable. Harvesting immature cumulus-oocyte complexes and immature oocytes can be achieved transvaginally or directly in the laboratory from extracorporeal ovarian tissue.

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Introduction: Despite improvements in long-term asthma treatment, an increasing number of children are being hospitalized in pediatric intensive care units (PICU) for asthma. The main objective of this study was to describe a recent cohort of children hospitalized in PICU for asthma to identify risk factors associated with a need for respiratory support, and multiple PICU stays.

Methods: We conducted a retrospective cohort study in three PICUs in Paris (intensive care units 3A Study), using medical files of children hospitalized for asthma between February 2019 and October 2020.

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Article Synopsis
  • A study was conducted on B^{+} decays to explore resonant structures using data from the LHCb experiment at various energy levels, totaling an integrated luminosity of 9 fb^{-1}.
  • The researchers performed a simultaneous amplitude fit on two decay channels, determining the C parities of resonances in the D^{*±}D^{∓} mass spectra.
  • Four new charmonium or charmoniumlike states were discovered, including η_{c}(3945) and h_{c}(4000), and the presence of T_{c[over ¯]s[over ¯]0}^{*}(2870)^{0} and T_{c[over ¯]s
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The concept of the Schwann cell by Louis Ranvier and his school: The 'interannular segment' as a cell unit.

J Hist Neurosci

October 2024

Medical Journal of Australia, Sydney, New South Wales, Australia.

Article Synopsis
  • The article commemorates the hundredth anniversary of Louis Ranvier's death and reassesses his role in defining the Schwann cell concept.
  • Ranvier, influenced by Theodor Schwann and Albert von Kölliker, utilized picrocarminate staining to study myelinated nerve fibers, leading to his identification of the "interannular segment."
  • Although his ideas were initially dismissed, they were later validated with electron microscopy in the 1950s, confirming the brilliance of Ranvier's insights alongside those of his pupil, William Vignal.
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Background: Suboptimal use of antimicrobials is a driver of antimicrobial resistance in West Africa. Clinical decision support systems (CDSSs) can facilitate access to updated and reliable recommendations.

Objective: This study aimed to assess contextual factors that could facilitate the implementation of a CDSS for antimicrobial prescribing in West Africa and Central Africa and to identify tailored implementation strategies.

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Drosophila glue, a bioadhesive produced by fly larvae to attach themselves to a substrate for several days, has recently gained attention for its peculiar adhesive and mechanical properties. Although Drosophila glue production was described more than 50 years ago, a general survey of the adhesive and mechanical properties of this proteinaceous gel across Drosophila species is lacking. To measure adhesion, we present here a protocol that is robust to variations in protocol parameters, pupal age and calculation methods.

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