1,613 results match your criteria: "Universite Toulouse III-Paul Sabatier[Affiliation]"

New Emerging Therapeutic Strategies Based on Manipulation of the Redox Regulation Against Therapy Resistance in Cancer.

Antioxid Redox Signal

November 2024

Mass General Cancer Center, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA and Broad Institute of MIT and Harvard, Cambridge, MA, USA.

Article Synopsis
  • Resistance to cancer treatments like chemotherapy and immunotherapy poses major challenges in effective patient care.
  • Redox homeostasis modification has shown promise in addressing this resistance by altering cellular signaling pathways.
  • The study highlights mechanisms such as increased antioxidant activity, drug efflux alterations, and enhanced DNA repair that enable tumor cells to survive treatments, suggesting that better insights into these processes could lead to improved therapy outcomes.
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Carbon, iron and sulfur records of lacustrine paleo-environments during the middle Eocene in eastern China.

Sci Total Environ

December 2024

State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Institute of Energy, Peking University, Beijing 100871, China; Sinopec Petroleum Exploration and Production Research Institute, Beijing 100083, China. Electronic address:

Article Synopsis
  • * The study used data from the middle Eocene Shahejie Formation in eastern China, revealing that high primary productivity and anoxic bottom waters led to significant organic carbon preservation.
  • * Transient geological events like volcanic eruptions and hydrothermal fluid input affected the geochemistry of the lake's waters, but bacterial sulfate reduction played a crucial role in maintaining conditions that favored organic carbon accumulation.
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Functional Analysis of MS-Based Proteomics Data: From Protein Groups to Networks.

Mol Cell Proteomics

December 2024

Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, Copenhagen, Denmark. Electronic address:

Mass spectrometry-based proteomics allows the quantification of thousands of proteins, protein variants, and their modifications, in many biological samples. These are derived from the measurement of peptide relative quantities, and it is not always possible to distinguish proteins with similar sequences due to the absence of protein-specific peptides. In such cases, peptide signals are reported in protein groups that can correspond to several genes.

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Fluorescence Modulation through the Inverted Energy Gap Law in Triply N-B←N-Containing Windmill-Shaped Triazines.

Angew Chem Int Ed Engl

January 2025

State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, Guangdong Basic Research Center of Excellence for Energy and Information Polymer Materials, South China University of Technology (SCUT), No. 381 Wushan Road, 510640, Guangzhou, P. R. China.

Article Synopsis
  • Researchers synthesized windmill-shaped heterocyclic molecules called TBN, known for their three N-B←N units and quasi-planar structure.
  • The parent TBN has a low fluorescence due to fast nonradiative decay, as revealed by advanced spectroscopy techniques.
  • Modifying TBN with phenyl or thienyl groups improves fluorescence and stabilizes the excited state, potentially leading to new advancements in fluorescence material design.
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Article Synopsis
  • Multiple myeloma (MM) is still an incurable cancer despite available therapies, with T-cell bispecific antibodies (TCBs) targeting BCMA and GPRC5D showing promise but facing issues like resistance and relapse due to antigen loss.
  • Forimtamig is a novel GPRC5D-targeting TCB that works more effectively than traditional formats by forming stable immunological connections, leading to better tumor cell destruction and T cell activation in preclinical studies.
  • Current research is exploring forimtamig in clinical trials for relapsed and refractory MM patients, both alone and alongside traditional care and new therapies, to enhance treatment outcomes and prevent relapses.
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Trehalose polyphleates participate in fitness and pathogenesis.

mBio

December 2024

Centre National de la Recherche Scientifique UMR 9004, Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, Montpellier, France.

Article Synopsis
  • * Research showed that when TPPs were deleted in mycobacterial variants, it significantly impaired their survival inside human macrophage cells and reduced their ability to block phagosome acidification.
  • * Experiments in zebrafish embryos indicated that TPPs are key for the pathogenicity of mycobacteria, as strains lacking TPPs demonstrated lower survival and reduced infection rates compared to their parent strains.
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Article Synopsis
  • A study compared two methods for stopping glucocorticoids in rheumatoid arthritis patients with low disease activity: replacing prednisone with hydrocortisone or tapering prednisone down gradually.
  • The trial included 102 patients and found that after 12 months, 55% in the hydrocortisone group and 47% in the tapering group successfully discontinued glucocorticoids, showing no significant difference between the groups.
  • The results indicated that neither strategy was superior for achieving discontinuation, and there were no serious side effects related to adrenal insufficiency observed.
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A Novel Isolation Approach for GaN-Based Power Integrated Devices.

Micromachines (Basel)

September 2024

Laboratoire Nanotechnologies Nanosystèmes, Institut Interdisciplinaire D'innovation Technologique, Université de Sherbrooke, 3000 Boulevard de l'Université, Sherbrooke, QC J1K 2R1, Canada.

This paper introduces a novel technology for the monolithic integration of GaN-based vertical and lateral devices. This approach is groundbreaking as it facilitates the drive of high-power GaN vertical switching devices through lateral GaN HEMTs with minimal losses and enhanced stability. A significant challenge in this technology is ensuring electrical isolation between the two types of devices.

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Protocol to identify E3 ligases amenable to biodegraders using a cell-based screening.

STAR Protoc

December 2024

Université de Toulouse, Inserm, CNRS, Université Toulouse III-Paul Sabatier, Centre de Recherches en Cancérologie de Toulouse, 31100 Toulouse, France. Electronic address:

Here, we provide a protocol for the identification of E3 ubiquitin ligases that are functional when implemented as biodegraders using a cell-based screening assay. We describe steps for establishing a stable cell line expressing a GFP-tagged protein of interest (POI), preparing a sub-library of E3 ligases to screen, and performing the cell-based screening. This protocol can be broadly applied to identify any functional E3 ligase in a biodegrader setting.

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Optimal synchronization to a limit cycle.

Chaos

October 2024

Física Teórica, Universidad de Sevilla, Apartado de Correos 1065, E-41080 Sevilla, Spain.

In the absence of external forcing, all trajectories on the phase plane of the van der Pol oscillator tend to a closed, periodic trajectory-the limit cycle-after infinite time. Here, we drive the van der Pol oscillator with an external time-dependent force to reach the limit cycle in a given finite time. Specifically, we are interested in minimizing the non-conservative contribution to the work when driving the system from a given initial point on the phase plane to any final point belonging to the limit cycle.

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Purpose: Dumping syndrome (DS) is a common complication of metabolic surgery, occurring in as many as 40% of bariatric patients. The reference diagnostic test is oral glucose tolerance testing (OGTT) which is often poorly tolerated and may induce false positive results. Continuous glucose monitoring (CGM) is better tolerated and can monitor patients for about 2 weeks in everyday life.

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The advent of digital pathology and the deployment of high-throughput molecular techniques are generating an unprecedented mass of data. Thanks to advances in computational sciences, artificial intelligence (AI) approaches represent a promising avenue for extracting relevant information from complex data structures. From diagnostic assistance to powerful research tools, the potential fields of application of machine learning techniques in pathology are vast and constitute the subject of considerable research work.

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Article Synopsis
  • Despite initial treatment with midostaurin (MIDO) and chemotherapy in FLT3-mutated acute myeloid leukemia (AML), many patients face relapses, with complete remission rates around 60-70% and over 40% relapsing.
  • A study of 150 patients with refractory/relapsed (R/R) AML revealed that those treated with MIDO showed lower persistence of FLT3-ITD mutations compared to those who did not receive MIDO (68% vs. 87.5%).
  • The study found that detecting multiple FLT3-ITD clones at diagnosis related to a higher persistence rate of these mutations at relapse, indicating the need for sensitive techniques in FLT3-
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Interleukin-33 (IL-33) is an alarmin released by epithelial cells in response to tissue damage. It activates resident immune sentinel cells, which then produce signals commonly associated with type 2 immune responses, particularly affecting infiltrating antigen-specific T cells. Given that mast cells (MCs) are a primary target of IL-33 and can shape T helper (Th) cell responses, we investigated the effect of IL-33 priming on the ability of MCs to influence Th cell cytokine production.

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Proteins are the primary targets of almost all small molecule drugs. However, even the most selectively designed drugs can potentially target several unknown proteins. Identification of potential drug targets can facilitate design of new drugs and repurposing of existing ones.

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Article Synopsis
  • The increasing ageing population necessitates better orthopedic implants to address issues like infection and inflammation affecting implant longevity.
  • Researchers explored bioinspired nanostructured materials, specifically titanium alloy and plasma-sprayed titania, to enhance antibacterial properties and blood compatibility in complex environments.
  • The study found that these nanostructured surfaces exhibited strong antibacterial effects and improved platelet healing responses compared to traditional materials, suggesting their potential in orthopedic applications.
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  • K-mer indexing is an effective technique for searching RNA sequences in RNA-seq libraries but hasn't allowed for direct quantification of RNA until now.
  • The study demonstrates that arbitrary RNA sequences can be quantified quickly and accurately by breaking them down into k-mers, achieving precision similar to traditional methods.
  • Using an extensive RNA-seq sample collection from the Cancer Cell Line Encyclopedia, the researchers showcase how k-mer indexing can uncover non-reference sequences and variant RNAs related to specific genetic changes.
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Incoherent collective cell chemotaxis underlies organ dysmorphia in a model of branchio-oto-renal syndrome.

MicroPubl Biol

September 2024

Department of Neurophysiology and Developmental Neurobiology,, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Juriquilla, México.

Article Synopsis
  • Mutations in the gene responsible for branchio-oto-renal syndrome (BOR) cause multi-organ malformations in humans and similar effects in animal models.
  • Researchers studied the zebrafish posterior lateral-line primordium to investigate the role of the Eya1 gene in organ development.
  • Their findings revealed that the loss of Eya1 reduces specific chemokine receptor expression, disrupting cell movement and leading to abnormal formation of the lateral line, which suggests that issues with cell movement contribute to organ malformations in BOR.
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Plastic debris exposure and effects in rivers: Boundaries for efficient ecological risk assessment.

Environ Sci Pollut Res Int

October 2024

Laboratoire Softmat, Université de Toulouse, CNRS UMR 5623, Université Toulouse III - Paul Sabatier, Toulouse, France.

Until recently, plastic pollution research was focused on the marine environments, and attention was given to terrestrial and freshwater environments latter. This discussion paper aims to put forward crucial questions on issues that limit our ability to conduct reliable plastic ecological risk assessments in rivers. Previous studies highlighted the widespread presence of plastics in rivers, but the sources and levels of exposure remained matters of debate.

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Purpose: Patients with IDH-mutant 1p/19q-codeleted grade 3 oligodendroglioma (O3) benefit from adding alkylating agent chemotherapy to radiotherapy (RT). However, the optimal chemotherapy regimen between procarbazine, 1-(2-Chloroethyl)-3-cyclohexyl-1-nitrosourea (CCNU), and vincristine (PCV) and temozolomide (TMZ) remains unclear given the lack of randomized trial data comparing both regimens.

Methods: The objective was to assess the overall survival (OS) and progression-free survival (PFS) associated with first-line PCV/RT versus TMZ/RT in patients newly diagnosed with O3.

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SURF2 is a MDM2 antagonist in triggering the nucleolar stress response.

Nat Commun

September 2024

Molecular, Cellular and Developmental Biology unit (MCD), Centre de Biologie Integrative (CBI), Team with an accreditation from the French "Ligue contre le Cancer" organism., University of Toulouse, CNRS, UPS, 118 route de Narbonne, Toulouse, Cedex, France.

Cancer cells rely on high ribosome production to sustain their proliferation rate. Many chemotherapies impede ribosome production which is perceived by cells as "nucleolar stress" (NS), triggering p53-dependent and independent pathways leading to cell cycle arrest and/or apoptosis. The 5S ribonucleoprotein (RNP) particle, a sub-ribosomal particle, is instrumental to NS response.

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In artemisinin-resistant falciparum malaria parasites, mitochondrial metabolic pathways are essential for survival but not those of apicoplast.

Int J Parasitol Drugs Drug Resist

December 2024

LCC-CNRS, Laboratoire de Chimie de Coordination, Université de Toulouse, CNRS, Toulouse, France; MAAP, New Antimalarial Molecules and Pharmacological Approaches, Inserm ERL 1289, Toulouse, France; Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III - Paul Sabatier (UT3), Toulouse, France. Electronic address:

Emergence and spread of parasite resistance to artemisinins, the first-line antimalarial therapy, threaten the malaria eradication policy. To identify therapeutic targets to eliminate artemisinin-resistant parasites, the functioning of the apicoplast and the mitochondrion was studied, focusing on the fatty acid synthesis type II (FASII) pathway in the apicoplast and the electron transfer chain in the mitochondrion. A significant enrichment of the FASII pathway among the up-regulated genes in artemisinin-resistant parasites under dihydroartemisinin treatment was found, in agreement with published transcriptomic data.

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Obesity alters adipose tissue response to fasting and refeeding in women: A study on lipolytic and endocrine dynamics and acute insulin resistance.

Heliyon

September 2024

Department of Pathophysiology, Centre for Research on Nutrition, Metabolism and Diabetes, Third Faculty of Medicine, Charles University, Prague, Czech Republic.

Fasting induces significant shifts in substrate utilization with signs of acute insulin resistance (IR), while obesity is associated with chronic IR. Nonetheless, both states substantially influence adipose tissue (AT) function. Therefore, in this interventional study (NCT04260542), we investigated if excessive adiposity in premenopausal women alters insulin sensitivity and AT metabolic and endocrine activity in response to a 60-h fast and a subsequent 48-h refeeding period.

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Background: Tumor-associated macrophages participate in the complex network of support that favors tumor growth. Among the various strategies that have been developed to target these cells, the blockade of the colony-stimulating factor 1 receptor (CSF-1R) receptor is one of the most promising ones. Here, we characterize the resulting state of human macrophages exposed to a CSF-1R kinase inhibitor.

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