2,061 results match your criteria: "F-75015; University Paris Descartes[Affiliation]"

Tick exposure biomarkers: A One Health approach to new tick surveillance tools.

Curr Res Parasitol Vector Borne Dis

August 2024

Institut Pasteur, Université Paris Cité, CNRS UMR 2000, INRAE USC 1510, Ecology and Emergence of Arthropod-borne Pathogens Unit, F-75015, Paris, France.

Article Synopsis
  • The global rise of tick-borne diseases (TBD) due to climate change and socio-economic factors highlights the need for better surveillance, diagnostics, and control strategies.
  • Current surveillance methods lack effectiveness regarding tick-related risks, and integrating human-tick encounters into these models could enhance disease risk assessments.
  • Research on antibodies against tick saliva proteins as biomarkers offers a promising way to improve monitoring of tick exposure, benefiting both human and animal health through improved TBD management strategies.
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Adaptation mechanisms of Clostridioides difficile to auranofin and its impact on human gut microbiota.

NPJ Biofilms Microbiomes

September 2024

Institut Pasteur, Université Paris Cité, UMR CNRS 6047, Laboratoire Pathogenèse des Bactéries Anaérobies, F-75015, Paris, France.

Article Synopsis
  • * Research investigated how bacteria might develop resistance to AF, focusing on the role of the thioredoxin reductase enzyme (TrxB) and its multiple forms in clinical strains, though the number of TrxB genes didn't affect AF's minimum inhibitory concentration (MIC).
  • * Mutations that arose after long-term exposure to AF were found in an anti-sigma factor, impacting bacterial physiology, and AF was shown to have a lesser effect on human gut microbiota compared to the antibiotic vancomycin.
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Cryo-EM structure and polar assembly of the PS2 S-layer of .

bioRxiv

September 2024

Structural and Molecular Microbiology, VIB-VUB Center for Structural Biology, VIB, Pleinlaan 2, 1050 Brussels, Belgium.

Article Synopsis
  • - The study focuses on Corynebacteriales, which have a unique outer membrane structure made of mycolic acids, and explores the mysterious 'S-layer' that enhances this membrane.
  • - Researchers isolated the PS2 S-layer and used advanced 3D cryoEM techniques to reveal its structure, consisting of hexameric core units and trimeric lattice arrangements that contribute to a semipermeable membrane.
  • - The findings provide insights into S-layer functions and evolution within Corynebacteriales, suggesting potential for developing bioengineered materials that utilize these membrane properties.
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Real-life implementation and evaluation of the e-referral system SIPILINK.

Int J Med Inform

February 2025

Université Paris Cité, Sorbonne Université, Inserm, Centre de Recherche des Cordeliers, F-75006 Paris, France; Inria, HeKA, PariSanté Campus Paris, France; Department of Medical Informatics, AP-HP, Hôpital Européen Georges-Pompidou, Hôpital Necker F-75015 Paris, France; AP-HP, Hôpital Européen Georges-Pompidou, Hôpital Necker F-75015 Paris, France. Electronic address:

Introduction: General Practitioners (GPs) play a key role of gatekeeper, as they coordinate patients' care. However, most of them reported having difficulty to refer patients to hospital, especially in semi-urgent context. To facilitate the referral of semi-urgent patients, we implemented an e-referral platform, named SIPILINK, within 4 wards from a large public French hospital (internal medicine, diabetology, gynaecological surgery and oncology wards).

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Protein Biomarkers of Gastric Preneoplasia and Cancer Lesions in Blood: A Comprehensive Review.

Cancers (Basel)

August 2024

Équipe DMic01-Infection, Génotoxicité et Cancer, Département de Microbiologie, Centre National de la Recherche Scientifique (CNRS) Unité Mixte de Recherche (UMR) 6047, Institut Pasteur, Université Paris Cité, F-75015 Paris, France.

Gastric cancer (GC) is a major cause of cancer-related mortality worldwide. It is often associated with a bad prognosis because of its asymptomatic phenotype until advanced stages, highlighting the need for its prevention and early detection. GC development is preceded by the emergence of gastric preneoplasia lesions (GPNLs), namely atrophic gastritis (AG), intestinal metaplasia (IM), and dysplasia (DYS).

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Background: Infants with Down syndrome (DS) are at high risk of obstructive sleep apnoea (OSA) which is associated with neurocognitive dysfunction and behaviour problems. The aim of our study was to evaluate the effect of early OSA treatment in infants with DS on neurocognitive development and behaviour.

Methods: In this prospective, interventional, non-randomised study, 40 infants with DS underwent polysomnography (PSG) every 6 months in room air between 6 and 36 months of age () and were compared to a control group of 40 infants with DS receiving standard of care and a single, systematic PSG in room air at 36 months of age ().

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Background: Access to sample-level metadata is important when selecting public metagenomic sequencing datasets for reuse in new biological analyses. The Standards, Precautions, and Advances in Ancient Metagenomics community (SPAAM, https://spaam-community.org) has previously published AncientMetagenomeDir, a collection of curated and standardised sample metadata tables for metagenomic and microbial genome datasets generated from ancient samples.

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The impact of the COVID-19 Pandemic on hypertension phenotypes (ESH ABPM COVID-19 study).

Eur J Intern Med

January 2025

Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Institute of Clinical Pharmacology and Toxicology, Berlin, Germany.

Article Synopsis
  • * It compared two groups of patients with treated hypertension: one group monitored during the pandemic and another monitored before it, looking at changes in hypertension phenotypes like sustained uncontrolled hypertension (SUCH) and sustained controlled hypertension (SCH).
  • * Results showed no significant changes in the pandemic group’s hypertension phenotypes, while the pre-pandemic group saw an increase in SCH and a decrease in SUCH, suggesting the pandemic negatively impacted blood pressure management.
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Article Synopsis
  • * Sugammadex can reverse the effects of rocuronium-induced neuromuscular blockade but may also provoke anaphylaxis, indicating a need for better treatment options.
  • * Research into the antibodies of patients with rocuronium sensitivity found a diverse range that can activate anaphylaxis; high-affinity antibodies capable of reversing rocuronium effects were isolated, suggesting new avenues for diagnosis and treatment.
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High Content Screening Assay of Inhibitors of the Legionella Pneumophila Histone Methyltransferase RomA in Infected Cells.

Chembiochem

December 2024

Epigenetic Chemical Biology, Department of Structural Biology and Chemistry, Institut Pasteur, Université Paris Cité, CNRS UMR n°3523 Chem4Life, F-75015, Paris, France.

Article Synopsis
  • - Resistance to antimicrobial agents poses a significant global health threat, prompting the need for new treatment strategies targeting pathogens’ ability to manipulate host defenses, especially through epigenetic modification.
  • - Legionella pneumophila, a Gram-negative intracellular bacterium, releases a specific methyltransferase named RomA that alters host epigenetic regulation by methylating H3 K14, helping the pathogen evade immune responses.
  • - To inhibit RomA's activity, researchers developed a high-content imaging assay to screen chemical compounds targeting methyltransferases, successfully identifying potential inhibitors from an initial library of 477 compounds.
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Article Synopsis
  • The study investigated how the COVID-19 pandemic affected blood pressure control in patients with hypertension using ambulatory blood pressure monitoring (ABPM).
  • Data were compared between two groups: patients measured before the pandemic and those measured during it, with a total of 704 pandemic patients and 916 prepandemic patients included in the analysis.
  • Results showed that during the pandemic, patients had higher blood pressure readings and a greater prevalence of uncontrolled hypertension, highlighting the need for strategies to manage blood pressure during such crises.
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Relationship between energetic gap and sensitivity to anti-programmed cell death 1 immune checkpoint inhibitors in non-small cell lung cancer patients: The ELY-2 study.

Clin Nutr ESPEN

December 2024

Department of Medical Oncology, Cochin Hospital, AP-HP, CARPEM, France; Immunomodulatory Therapies Multidisciplinary Study Group (CERTIM), Paris, France; Paris Cité University, France; Institut Cochin, INSERM U1016, Paris, France.

Background & Aims: We previously reported in the ELY prospective study that increased resting energy expenditure (REE) - so-called hypermetabolism - worsened tumor response, 6-month progression-free (PFS) and overall survival (OS) in metastatic non-small cell lung cancer (mNSCLC) patients treated with immune checkpoint inhibitors (ICI). Here, we investigated the effect of caloric coverage on the sensitivity to ICI.

Methods: We retrospectively analysed a multicentric database of mNSCLC patients treated with ICI.

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[Implementation of edoxaban anti-Xa activity assay in a hospital laboratory and evaluation of its analytical performance].

Ann Biol Clin (Paris)

September 2024

Service d'Hématologie Biologique, Assistance Publique Hôpitaux de Paris-Centre (AP-HP.CUP), F-75015 Paris, France, Université Paris Cité, Innovative Therapies in Haemostasis, INSERM, 75006 Paris, France, INNOVTE, F-CRIN, Saint-Étienne, France.

Article Synopsis
  • Edoxaban is a direct oral anticoagulant not available in France, making it important to understand its pharmacology and lab testing, especially with high tourist traffic.
  • The study focused on measuring the anti-Xa activity of edoxaban using a specific chromogenic method, detailing pre-analytical and analytical processes for accurate therapeutic guidance.
  • Results showed the measurement method to be reliable and straightforward, suggesting that even though it's seldom used clinically, having the ability to measure edoxaban levels in French hospitals is important due to its availability in nearby countries.
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MYSM1 deficiency causes inherited bone marrow failure syndrome (IBMFS). We have previously identified an IBMFS patient with a homozygous pathogenic variant in MYSM1 who recovered from cytopenia due to spontaneous correction of one MYSM1 variant in the haematopoietic compartment, an event called somatic genetic rescue (SGR). The study of the genetic and biological aspects of the patient's haematopoietic/lymphopoietic system over a decade after SGR shows that one genetically corrected haematopoietic stem cell (HSC) can restore a healthy and stable haematopoietic system.

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Heterozygous variant as a novel genetic cause of telomere biology disorders.

Genes Dev

September 2024

UMR7258 Centre National de la Recherche Scientifique (CNRS), UMR1068 Institut National de la Santé et de la Recherche Médicale (INSERM), UM105 Aix Marseille University, Institut Paoli-Calmettes, Centre de Recherche en Cancérologie de Marseille (CRCM), Laboratoire Labellisée par la Ligue Nationale Contre le Cancer, F-13009 Marseille, France;

Premature telomere shortening or telomere instability is associated with a group of rare and heterogeneous diseases collectively known as telomere biology disorders (TBDs). Here we identified two unrelated individuals with clinical manifestations of TBDs and short telomeres associated with the identical monoallelic variant c.767A>G; Y256C in Although the replication protein A2 (RPA2) mutant did not affect ssDNA binding and G-quadruplex-unfolding properties of RPA, the mutation reduced the affinity of RPA2 with the ubiquitin ligase RFWD3 and reduced RPA ubiquitination.

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Spotlight on the epidemiology and antimicrobial susceptibility profiles of species in the MENA region, 2000-2023.

Future Microbiol

October 2024

Laboratoire Microbiologie, Santé et Environnement (LMSE), Doctoral School of Sciences & Technology, Faculty of Public Health, Lebanese University, Tripoli, 1300, Lebanon.

Recent cholera outbreaks in many countries in the Middle East and North Africa (MENA) region have raised public health concerns and focused attention on the genus . However, the epidemiology of species in humans, water, and seafood is often anecdotal in this region. In this review, we screened the literature and provided a comprehensive assessment of the distribution and antibiotic resistance properties of species in different clinical and environmental samples in the region.

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Exploring the diversity of anti-defense systems across prokaryotes, phages, and mobile genetic elements.

bioRxiv

August 2024

Institut Pasteur, CNRS UMR3525, Molecular Diversity of Microbes Lab, Paris, France.

Article Synopsis
  • The co-evolution of prokaryotes, phages, and mobile genetic elements has led to the development of various defense and anti-defense systems, which are challenging to detect due to the diverse nature of anti-defense proteins.
  • The newly developed "AntiDefenseFinder" is an open-source tool that identifies 156 anti-defense systems across prokaryotic genomes and has revealed 47,981 systems in total, highlighting the occurrence of "anti-defense islands" in some cases.
  • The study indicates that many anti-defense systems are located in specific mobile genetic elements, with notable findings on the Apyc1 protein, which likely started in bacteria and has been adapted by phages to bypass bacterial defenses.
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Characteristics and outcomes associated with CD2 and CD25 expression on bone marrow mast cells in patients with systemic mastocytosis.

Haematologica

January 2025

Université Paris Cité, INSERM UMR-S1151, CNRS UMR-S8253, Institut Necker Enfants Malades, F-75015 Paris, France; Hôpital Necker Enfants-Malades, Laboratoire d'Onco-Hématologie, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris.

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[Evaluation of a semi-automated test for quantification of von Willebrand multimers].

Ann Biol Clin (Paris)

September 2024

Université Paris Cité, Innovative Thérapies in Haemostasis, INSERM UMR-S1140, F-75006 Paris, France, AP-HP, Hôpital européen Georges Pompidou, Service d'Hématologie biologique, F-75015 Paris, France.

Article Synopsis
  • The study focuses on assessing von Willebrand factor (VWF) multimer distribution, especially in patients with circulatory support devices, using a semi-automated method with the Sebia Hydrasys analyzer.
  • The team evaluated different sizes of VWF multimers through electrophoretic migration and densitometric analysis, discovering that high plasma VWF levels complicated the analysis in these patients.
  • Adjustments to the methodology, including using a standardized control like Cryocheck™ plasma, improved the precision of the results and established reference values for effective VWF multimer profiling.
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Lipid lysination by MprF contributes to hemolytic pigment retention in group B Streptococcus.

Res Microbiol

November 2024

Institut Pasteur, Université Paris Cité, CNRS UMR6047, Biology of Gram-positive Pathogens Unit, F-75015 Paris, France. Electronic address:

Group B Streptococcus (GBS) is the leading cause of neonatal sepsis and meningitis. A major virulence factor is a pigmented beta-haemolytic/cyto-lysin (β-h/c) toxin with an ornithine rhamnolipid structure. We initially observed that absence of MprF enzyme altered pigmentation and haemolytic activity in GBS.

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The management of extensive tracheal resection followed by circumferential replacement remains a surgical challenge. Numerous techniques are proposed with mixed results. Partial decellularization of the trachea with the removal of the mucosal and submucosal cells is a promising method, reducing immunogenicity while preserving the biomechanical properties of the final matrix.

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Splice modulation strategy applied to deep intronic variants in causing recessive dystrophic epidermolysis bullosa.

Proc Natl Acad Sci U S A

August 2024

Université Paris Cité, Inserm, UMR 1163, Institut Imagine, Laboratory of Genetic Skin Diseases, Paris F-75015, France.

Recessive dystrophic epidermolysis bullosa (RDEB) is a rare and most often severe genetic disease characterized by recurrent blistering and erosions of the skin and mucous membranes after minor trauma, leading to major local and systemic complications. The disease is caused by loss-of-function variants in encoding type VII collagen (C7), the main component of anchoring fibrils, which form attachment structures stabilizing the cutaneous basement membrane zone. Alterations in C7 protein structure and/or expression lead to abnormal, rare or absent anchoring fibrils resulting in loss of dermal-epidermal adherence and skin blistering.

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Background: Multidisciplinary functional restoration programs (FRPs) aim to improve pain and function in people with chronic low back pain (CLBP). The intensity and content of FRPs varies; the benefits of one program over another are unclear.

Objective: To assess changes in trunk muscle strength and endurance after an intensive (IFRP) (for people on sick leave for >6 months with high levels of fear-avoidance beliefs about physical activity and work) or semi-intensive (SIFRP) (for people working) FRP in people with CLBP.

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Acyl-CoA binding protein for the experimental treatment of anorexia.

Sci Transl Med

August 2024

Centre de Recherche des Cordeliers, Equipe labellisée par la Ligue contre le cancer, Inserm U1138, Université Paris Cité, Sorbonne Université, 75006 Paris, France.

Extracellular acyl-coenzyme A binding protein [ACBP encoded by diazepam binding inhibitor (DBI)] is a phylogenetically ancient appetite stimulator that is secreted in a nonconventional, autophagy-dependent fashion. Here, we show that low ACBP/DBI plasma concentrations are associated with poor prognosis in patients with anorexia nervosa, a frequent and often intractable eating disorder. In mice, anorexia induced by chronic restraint stress (CRS) is accompanied by a reduction in circulating ACBP/DBI concentrations.

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