1,303 results match your criteria: "Universite Claude Bernard Lyon I[Affiliation]"

Article Synopsis
  • - Peripheral T cell lymphomas (PTCLs) have poor clinical outcomes and are linked to chronic T cell receptor (TCR) activation, but their exact mechanisms are not well understood.
  • - Research using a mouse model shows that while chronic TCR stimulation can lead to the development of PTCLs, it does not help their survival; instead, PTCLs reprogram to adopt characteristics similar to natural killer (NK) cells, expressing NK cell receptors (NKRs) and relying on specific signaling pathways.
  • - Analysis of human PTCL cases indicates that a similar reprogramming occurs, prompting the need for clinical studies targeting molecules like SYK and NKRs to potentially improve treatment outcomes for this aggressive cancer.
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The search for truly quantum phases of matter is a center piece of modern research in condensed matter physics. Quantum spin liquids, which host large amounts of entanglement-an entirely quantum feature where one part of a system cannot be measured without modifying the rest-are exemplars of such phases. Here, we devise a realistic model which relies upon the well-known Haldane chain phase, i.

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Article Synopsis
  • - Mesenchymal stem cells from adipose tissue have immunosuppressive properties and may play a role in cell therapy, but their effects on early obesity-related inflammation were not previously understood.
  • - A study using mice on a high-fat diet revealed distinct responses from adipose stem cells (ASC) in different fat areas: subcutaneous ASC inhibited T cell growth, while visceral ASC reduced TNFα in macrophages and increased IL6 production.
  • - These findings suggest that ASC behave as metabolic sensors, adapting to obesity conditions and influencing inflammation differently based on their location in the body, potentially affecting the onset of obesity-related inflammation.
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Siberian cats help in solving part of the mystery surrounding golden cats.

Anim Genet

August 2021

VetAgro Sup, Univ. Lyon, 1 avenue Bourgelat, 69280, Marcy-l'Etoile, France.

Golden cats have been appreciated since the beginning of the cat fancy. Golden is a modification of the tabby coat. In the Siberian breed, a specific golden phenotype, named sunshine, has been described.

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The Mediterranean corn borer (Sesamia nonagrioides, Noctuidae, Lepidoptera) is a major pest of maize in Europe and Africa. Here, we report an assembly of the nuclear and mitochondrial genome of a pool of inbred males and females third-instar larvae, based on short- and long-read sequencing. The complete mitochondrial genome is 15,330 bp and contains all expected 13 and 24 protein-coding and RNA genes, respectively.

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Article Synopsis
  • - The study focuses on the management of anomalous aortic origin of a coronary artery, which can be linked to sudden death in young individuals, especially those with an inter-arterial course.
  • - Over a 25-year period, 100 patients were diagnosed, with higher rates of syncope and sudden death among those with an inter-arterial course compared to others (23.4% vs 0%).
  • - Surgical repair was performed on 61 patients, all of whom had the inter-arterial course and were asymptomatic after an average follow-up of about 5 years, suggesting that surgical intervention is a viable option even for asymptomatic cases.
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Characterization of topographic effects on sonic boom reflection by resolution of the Euler equations.

J Acoust Soc Am

April 2021

Ecole Centrale de Lyon, Institut National des Sciences Appliquées de Lyon, Centre National de la Recherche Scientifique, Laboratoire de Mécanique des Fluides et d'Acoustique, Université Claude Bernard Lyon I, Unité Mixte de Recherche 5509, 36 Avenue Guy de Collongue, F-69134, Ecully, France.

The influence of topography on sonic boom propagation is investigated. The full two-dimensional Euler equations in curvilinear coordinates are solved using high-order finite-difference time-domain techniques. Simple ground profiles, corresponding to a terrain depression, a hill, and a sinusoidal terrain, are examined for two sonic boom waves: a classical N-wave and a low-boom.

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Improved cell signaling analysis by biofunctionalized nanospheres and imaging flow cytometry.

Cytometry A

November 2021

CIRI, INSERM U1111, Université Claude Bernard Lyon I, CNRS UMR5308, Ecole Normale Supérieure de Lyon, University of Lyon, Lyon, France.

The analysis of immune cell signaling is critical for the understanding of the biology and pathology of the immune system, and thus a mandatory step for the development of efficient biomarkers and targeted therapies. Phosflow, which has progressively replaced the traditional western blot approach, relies on flow cytometry to analyze various signaling pathways at a single-cell level. This technique however suffers a lack of sensitivity largely due to the low signal/noise ratio that characterizes cell signaling analysis.

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Transplant immunology is currently largely focused on conventional adaptive immunity, particularly T and B lymphocytes, which have long been considered as the only cells capable of allorecognition. In this vision, except for the initial phase of ischemia/reperfusion, during which the role of innate immune effectors is well established, the latter are largely considered as "passive" players, recruited secondarily to amplify graft destruction processes during rejection. Challenging this prevalent dogma, the recent progresses in basic immunology have unraveled the complexity of the innate immune system and identified different subsets of innate (and innate-like) lymphoid cells.

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A brief esophageal dysphagia questionnaire (BEDQ) was recently developed in English to evaluate frequency and intensity of dysphagia. Our aim was to validate this questionnaire in French in a cohort of patients referred for esophageal manometry. Patients referred for esophageal high resolution manometry were offered to fill out different questionnaires including Eckart score, GERDQ score and BEDQ.

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Stratifying the humoral risk of candidates to a solid organ transplantation: a proposal of the ENGAGE working group.

Transpl Int

June 2021

Service de Transplantation, Néphrologie et Immunologie Clinique, Hôpital Edouard Herriot, Lyon, France.

Detection of circulating antibodies directed against human leukocyte antigen (HLA) molecules, which corresponds to the current definition of 'sensitized patient', has been shown to have a severe impact on both access to transplantation and, if the anti-HLA antibodies are specific to the selected donor, survival of the graft. However, not all donor-specific antibodies (DSA) are equally harmful to the graft and progress in the understanding of humoral memory has led to the conclusion that absence of DSA at transplantation does not rule out the possibility that the patient has a preformed cellular humoral memory against the graft (thereby defining a category of DSA-negative sensitized recipients). Technological progress has led to the generation of new assays that offer unprecedented precision in exploring the different layers (serological and cellular) of alloimmune humoral memory.

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Objective: Mutations in superoxide dismutase 1 gene (, encoding copper/zinc superoxide dismutase protein, are the second most frequent high penetrant genetic cause for amyotrophic lateral sclerosis (ALS) motor neuron disease in populations of European descent. More than 200 missense variants are reported along the SOD1 protein. To limit the production of these aberrant and deleterious SOD1 species, antisense oligonucleotide approaches have recently emerged and showed promising effects in clinical trials.

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The demonstration of the link between certain genetic variations and drug response has allowed the emergence of pharmacogenetics, which offers many opportunities to improve patient care. Type-2 diabetes mellitus is a disease for which several gene polymorphisms have been reported to be associated with drug response. Sulfonylureas are commonly used for the management of this disease.

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The circadian oscillator analysed at the single-transcript level.

Mol Syst Biol

March 2021

Institute of Bioengineering, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.

The circadian clock is an endogenous and self-sustained oscillator that anticipates daily environmental cycles. While rhythmic gene expression of circadian genes is well-described in populations of cells, the single-cell mRNA dynamics of multiple core clock genes remain largely unknown. Here we use single-molecule fluorescence in situ hybridisation (smFISH) at multiple time points to measure pairs of core clock transcripts, Rev-erbα (Nr1d1), Cry1 and Bmal1, in mouse fibroblasts.

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A multisensory perspective onto primate pulvinar functions.

Neurosci Biobehav Rev

June 2021

Institut des Sciences Cognitives Marc Jeannerod, CNRS UMR 5229, Université Claude Bernard Lyon I, 67 Boulevard Pinel, 69675, Bron Cedex, France. Electronic address:

Perception in ambiguous environments relies on the combination of sensory information from various sources. Most associative and primary sensory cortical areas are involved in this multisensory active integration process. As a result, the entire cortex appears as heavily multisensory.

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Behavioral validation of novel high resolution attention decoding method from multi-units & local field potentials.

Neuroimage

May 2021

Institut des Sciences Cognitives Marc Jeannerod, CNRS UMR 5229, Université Claude Bernard Lyon I, 67 Boulevard Pinel, 69675 Bron Cedex, France. Electronic address:

The ability to access brain information in real-time is crucial both for a better understanding of cognitive functions and for the development of therapeutic applications based on brain-machine interfaces. Great success has been achieved in the field of neural motor prosthesis. Progress is still needed in the real-time decoding of higher-order cognitive processes such as covert attention.

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Microsurgical DREZotomy for Treatment of Brachial Plexus Avulsion Pain.

World Neurosurg

April 2021

Functional Neurosurgery Department, Neurology and Neurosurgery Hospital Pierre Wertheimer, Hospices Civils de Lyon, Lyon, France; University of Lyon, University Claude Bernard Lyon I, Lyon, France; Anatomy Laboratory, University of Lyon, Université Claude Bernard Lyon I, Lyon, France.

A 63-year-old man with a history of motorcycle accident 42 years ago suffered a left brachial plexus avulsion (BPA). Neuropathic pain in his left upper limb was felt in the C6-C7-C8 dermatomes. The rationale for performing "DREZotomy" is to preferentially interrupt the nociceptive inputs in the lateral part of the dorsal root entry zone (DREZ).

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Numerical investigation of wave steepening and shock coalescence near a cold Mach 3 jet.

J Acoust Soc Am

January 2021

Univ. Lyon, École Centrale de Lyon, INSA Lyon, Université Claude Bernard Lyon I, CNRS, Laboratoire de Mécanique des Fluides et d'Acoustique, UMR 5509, F-69134 Ecully, France.

Wave steepening and shock coalescence due to nonlinear propagation effects are investigated for a cold Mach 3 jet. The jet flow and near pressure fields are computed using large-eddy simulation. The near acoustic field is propagated to the far field by solving the linearized or the weakly nonlinear Euler equations.

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Purpose: To assess the impact of a different distortion correction (DC) method and patient geometry (sagittal balance) on the quality of spinal cord tractography rendering according to different tractography approaches.

Methods: Forty-four adults free of spinal cord diseases underwent cervical diffusion-weighted imaging. The phase-encoding direction was head→foot.

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Spondyloarthritis (Spa), Behçet's disease (BD) and sarcoidosis are major systemic inflammatory diseases worldwide. They are all multisystem pathologies and share a possible ocular involvement, especially uveitis. We hereby describe selected cases who were referred by ophthalmologists to our internal medicine department for unexplained uveitis.

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Individual differences in sulcal variation within the anterior and mid-cingulate cortex of the human brain, particularly the presence or absence of a paracingulate sulcus (PCGS), are associated with various motor and cognitive processes. Recently, it has been reported that chimpanzees possess a PCGS, previously thought to be a unique feature of the human brain. Here, we examined whether individual variation in the presence or absence of a PCGS as well as the variability in the intralimbic sulcus (ILS) are associated with oro-facial motor control, handedness for manual gestures, and sex in a sample of MRI scans obtained in 225 chimpanzees.

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As sentinel lymph nodes (SLNs) are the first nodes receiving drainage from primary tumors, they provide important prognostic information about the nodal status of a tumor. SLN biopsy has modified the lymph node assessment by pathologists. This review highlights the different ways of histopathological and molecular SLN assessment according to the different gynecological cancers.

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A Roadmap Toward the Definition of Actionable Tumor-Specific Antigens.

Front Immunol

June 2021

Institute for Research in Immunology and Cancer, Université de Montréal, Montréal, QC, Canada.

The search for tumor-specific antigens (TSAs) has considerably accelerated during the past decade due to the improvement of proteogenomic detection methods. This provides new opportunities for the development of novel antitumoral immunotherapies to mount an efficient T cell response against one or multiple types of tumors. While the identification of mutated antigens originating from coding exons has provided relatively few TSA candidates, the possibility of enlarging the repertoire of targetable TSAs by looking at antigens arising from non-canonical open reading frames opens up interesting avenues for cancer immunotherapy.

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