7,508 results match your criteria: "PSL* Research University[Affiliation]"

Simultaneous 2-photon and 3-photon excitation with a red fluorescent protein-cyanine dye probe pair in the 1700-nm excitation window for deep neurovascular imaging.

Biomed Opt Express

December 2024

Guangdong Provincial Key Laboratory of Biomedical Optical Imaging Technology, Center for Biomedical Optics and Molecular Imaging, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.

imaging of the neurovascular network is considered to be one of the most powerful approaches for understanding brain functionality. Nevertheless, simultaneously imaging the biological neural network and blood vessels in deep brain layers in a non-invasive manner remains to a major challenge due to the lack of appropriate labeling fluorescence probe pairs. Herein, we proposed a 2-photon and 3-photon fluorescence probe pair for neurovascular imaging.

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[The new generations of CAR-T cells].

Med Sci (Paris)

November 2024

Dynamics of intracellular organization laboratory, Institut Curie, PSL Research University, Sorbonne Université, CNRS, UMR144, Paris, France - Cell therapy Acceleration and Innovation (CellAction), Institut Curie, Suresnes, France.

Chimeric antigen receptor (CAR)-T is one of the most promising modern cancer immunotherapies. In the recent years, impressive results have been obtained in the treatment of cancer which led to FDA approval for the treatment of liquid tumors. In this cell-based therapy, immune cells (e.

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Alternative splicing enhances protein diversity in different ways, including through exonization of transposable elements (TEs). Recent transcriptomic analyses identified thousands of unannotated spliced transcripts with exonizing TEs, but their contribution to the proteome and biological relevance remains unclear. Here, we use transcriptome assembly, ribosome profiling, and proteomics to describe a population of 1,227 unannotated TE exonizing isoforms generated by mRNA splicing and recurrent in human populations.

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Escherichia coli is an increasingly antibiotic-resistant opportunistic pathogen. Few data are available on its ecological and evolutionary dynamics in its primary commensal niche, the vertebrate gut. Using Illumina and/or Nanopore technologies, we sequenced whole genomes of 210 E.

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Widespread presence of metallic compounds and organic contaminants across Pacific coral reef fish.

Sci Total Environ

December 2024

ENTROPIE (UR-IRD-CNRS-IFREMER-UNC), Université de la Nouvelle-Calédonie, LabEx "Corail", BP R4, 98851 Nouméa, Cedex, New Caledonia. Electronic address:

Coral reef fishes represent an invaluable source of macro- and micro-nutrients for tropical coastal populations. However, several potentially toxic compounds may jeopardize their contribution to food security. Concentrations of metallic compounds and trace elements (MTEs), and persistent organic pollutants (POPs, including pesticides and polychlorobiphenyls PCBs), totalizing 36 contaminants, were measured in coral reef fish from several Pacific islands.

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Article Synopsis
  • Physical vapor deposition creates organic glasses with high kinetic stability, which can slowly transition to supercooled liquids when heated.
  • The study investigates the rejuvenation of vapor-deposited methyl-m-toluate glasses after 6 hours of annealing at a temperature close to their glass transition temperature (Tg), finding moderate glasses show rejuvenation, while highly stable glasses do not show expected changes.
  • Surprisingly, annealing lead to increased storage component of dielectric susceptibility in stable glasses without increases in the loss component, indicating short-term rejuvenation affects high-frequency relaxation processes; simulations showed no rejuvenation in similarly stable glasses within the same time frame.
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Networks of excitatory and inhibitory (EI) neurons form a canonical circuit in the brain. Seminal theoretical results on dynamics of such networks are based on the assumption that synaptic strengths depend on the type of neurons they connect, but are otherwise statistically independent. Recent synaptic physiology datasets however highlight the prominence of specific connectivity patterns that go well beyond what is expected from independent connections.

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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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Black corals are key species of marine ecosystems. They can be found in dense aggregations worldwide, but some parts of the world remain totally unexplored. This is the case of the Mesophotic Coral Ecosystem of Mo'orea where the Under the Pole scientific expedition explored mesophotic ecosystems between 60 and 120 m depth and focused on whip black corals.

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Nuclear magnetic resonance (NMR) spans diverse fields from biology to quantum science. Employing NMR on a floating object could unveil novel possibilities beyond conventional operational paradigms. Here, we observe NMR within a levitating microdiamond using the nuclear spins of nitrogen-14 atoms.

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Intricate ribosome composition and translational reprogramming in epithelial-mesenchymal transition.

Proc Natl Acad Sci U S A

December 2024

"Ribosome, Translation and Cancer" Team, LabEx DEVweCAN, Institut Convergence Plascan, LYriCAN+, Centre de Recherche en Cancérologie de Lyon, INSERM U1052, CNRS UMR5286, Centre Léon Bérard, Université de Lyon, Université Claude Bernard Lyon 1, Lyon 69008, France.

Epithelial-mesenchymal transition (EMT) involves profound changes in cell morphology, driven by transcriptional and epigenetic reprogramming. However, evidence suggests that translation and ribosome composition also play key roles in establishing pathophysiological phenotypes. Using genome-wide analyses, we reported significant rearrangement of the translational landscape and machinery during EMT.

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Cortical signals have been shown to track acoustic and linguistic properties of continuous speech. This phenomenon has been measured in both children and adults, reflecting speech understanding by adults as well as cognitive functions such as attention and prediction. Furthermore, atypical low-frequency cortical tracking of speech is found in children with phonological difficulties (developmental dyslexia).

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Myosin 1b regulates intestinal epithelial morphogenesis via interaction with UNC45A.

Cell Rep

December 2024

Institut Curie, PSL Research University, INSERM U934, CNRS UMR3215, 75248 Paris Cedex, France; Sorbonne Université, INSERM, CNRS, Institut de la Vision, 75012 Paris, France. Electronic address:

Vesicle trafficking and the establishment of apicobasal polarity are essential processes in epithelial morphogenesis. UNC45A deficiency has been reported in a multi-organ syndrome presenting with severe diarrhea associated with enterocyte polarity defects. Myosin 1b, an actin motor able to bind membranes, regulates membrane shaping and vesicle trafficking.

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Most stars in today's Universe reside within spheroids, which are bulges of spiral galaxies and elliptical galaxies. Their formation is still an unsolved problem. Infrared/submillimetre-bright galaxies at high redshifts have long been suspected to be related to spheroid formation.

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Article Synopsis
  • Cold piezoelectric plasma (CPP) is a new cancer treatment method that can lead to cancer cell death and the development of portable treatment devices, specifically targeting cholangiocarcinoma (CCA).
  • In vitro experiments use two types of CPP devices, corona discharge (Pz-CD) and dielectric barrier discharge (Pz-DBD), with Pz-CD delivering more power but both generating significant reactive species.
  • CPP shows immediate effects like remodeling of the actin cytoskeleton and long-term effects through activation of the DNA damage response pathway, suggesting its potential as an effective antitumor therapy.
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  • Tumor-infiltrating memory T cell subpopulations in non-small cell lung cancer (NSCLC) can be categorized based on various surface markers, with CD103 often used but not universally expressed.
  • In studies, multiparametric cytometry and multiplex immunofluorescence techniques were applied to analyze T-cell behavior in vaccinated mice and human NSCLC patients, revealing distinct subpopulations and their impact on clinical outcomes.
  • Results showed that a specific double-positive T cell subset (CD103+CD49a+) was more functional than a single-positive subset (CD49a+), with implications for predicting responses to immunotherapy, particularly relating to PD-1 treatment.
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Stroke patients often experience post-stroke emotional impairments, yet the underlying pathophysiology remains unclear. At the brain level, dysregulation of socio-affective skills should be considered through alterations in brain networks instead of isolated regions. Investigating network alterations may be crucial in explaining emotional or cognitive deficits.

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An essential role of glial cells is to comply with the large and fluctuating energy needs of neurons. Metabolic adaptation is integral to the acute stress response, suggesting that glial cells could be major, yet overlooked, targets of stress hormones. Here we show that Dh44 neuropeptide, Drosophila homologue of mammalian corticotropin-releasing hormone (CRH), acts as an experience-dependent metabolic switch for glycolytic output in glia.

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Article Synopsis
  • The proper positioning and orientation of the mitotic spindle during cell division is essential for early embryo development, maintaining tissue structure, and regulating stem cell function.
  • Errors in spindle positioning can lead to tissue disorders and contribute to tumor development in stem cells.
  • The study presents a technique using in vivo magnetic tweezers to control spindle position and orientation in sea urchin embryos, allowing researchers to study the effects of spindle manipulation on embryo development and potentially apply this method to other cell types.
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Characterizing the Slow Dynamics of the Swap Monte Carlo Algorithm.

J Phys Chem B

December 2024

Laboratoire Charles Coulomb (L2C), Université de Montpellier, CNRS, 34095 Montpellier, France.

The swap Monte Carlo algorithm introduces nonphysical dynamic rules to accelerate the exploration of the configuration space of supercooled liquids. Its success raises deep questions regarding the nature and physical origin of the slow dynamics of dense liquids and how it is affected by swap moves. We provide a detailed analysis of the slow dynamics generated by the swap Monte Carlo algorithm at very low temperatures in two glass-forming models.

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Immune digital twins for complex human pathologies: applications, limitations, and challenges.

NPJ Syst Biol Appl

November 2024

Biocomplexity Institute and Department of Intelligent Systems Engineering, Indiana University, Bloomington, Indiana, 47408, USA.

Digital twins represent a key technology for precision health. Medical digital twins consist of computational models that represent the health state of individual patients over time, enabling optimal therapeutics and forecasting patient prognosis. Many health conditions involve the immune system, so it is crucial to include its key features when designing medical digital twins.

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Article Synopsis
  • Head and neck squamous cell carcinoma (HNSCC) shows significant genetic diversity within tumors, complicating targeted treatment approaches and making traditional imaging ineffective for detecting minimal residual disease (MRD).
  • A study of 41 patients with resectable HNSCC found that circulating tumor DNA (ctDNA) can serve as a biomarker for assessing tumor heterogeneity and MRD, with notable detection rates at surgery and recurrence.
  • The presence of ctDNA shortly after surgery correlated with disease recurrence, providing an early warning about potential relapse, thus supporting its role in post-operative monitoring and precision medicine strategies.
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Objectives: Human cancer is considered to be an important cause of death worldwide. Polypyrimidine tract binding protein 1 (PTBP1) is emerging as a powerful pro-oncogenic factor in bladder and liver cancer; however, no pan-cancer analysis is presently available. Our study aimed to explore PTBP1 expression profiles, prognostic immunological value, and biological functions across various cancers.

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IL1-β plays a central role in inflammation but its biological action needs to be tightly controlled. Such negative regulation can be exerted by the decoy receptor IL1R2. However, IL1R2 biology in immune cells remains poorly characterized, in particular in monocytes.

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Stem cells perceive and respond to biochemical and physical signals to maintain homeostasis. Yet, it remains unclear how stem cells sense mechanical signals from their niche in vivo. In this work, we investigated the roles of PIEZO mechanosensitive channels in the intestinal stem cell (ISC) niche.

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