6,766 results match your criteria: "UPMC Univ.[Affiliation]"

Transcriptional Dysregulation Underlies Both Monogenic Arrhythmia Syndrome and Common Modifiers of Cardiac Repolarization.

Circulation

March 2023

Departments of Pharmacology (K.R.B., A.M.G., D.O.K., K.K., J-E.S., C.C.C., Q.S.W., S.P., B.C.K., D.M.R.), Vanderbilt University, Nashville, TN.

Article Synopsis
  • Brugada syndrome (BrS) is an inherited heart condition caused by mutations in the sodium channel gene, and a specific family was found to have a rare G145R variant in a different gene, TBX5, associated with BrS.* -
  • Researchers created induced pluripotent stem cells (iPSCs) from family members with the G145R variant and studied the resulting heart cells (iPSC-CMs) to analyze their electrical properties and gene expression differences, comparing them with edited versions using CRISPR technology.* -
  • The study found that the G145R variant leads to reduced gene activity and abnormal heart cell behavior, specifically affecting sodium currents, while correcting the mutation restored normal function; disruptions in
View Article and Find Full Text PDF

Modulation of the immune response by the type-III secretion system.

Front Cell Infect Microbiol

December 2022

Mucoviscidose: Phénotypique et Phénogénomique, Centre de Recherche Saint-Antoine, Sorbonne Universités, UPMC Univ Paris 06, INSERM, Paris, France.

is an opportunistic pathogen that can cause critical cellular damage and subvert the immune response to promote its survival. Among the numerous virulence factors of , the type III secretion system (T3SS) is involved in host cell pathogenicity. Using a needle-like structure, T3SS detects eukaryotic cells and injects toxins directly into their cytosol, thus highlighting its ability to interfere with the host immune response.

View Article and Find Full Text PDF

Novel Cardiokine GDF3 Predicts Adverse Fibrotic Remodeling After Myocardial Infarction.

Circulation

February 2023

Paris Cardiovascular Research Center, INSERM (N.M., M.B., C.J., F.D., O.C., C.D., E.R., G.M., D.S., M.V., J.-S.H.), Université de Paris, Cité' France.

Background: Myocardial infarction (MI) induces a repair response that ultimately generates a stable fibrotic scar. Although the scar prevents cardiac rupture, an excessive profibrotic response impairs optimal recovery by promoting the development of noncontractile fibrotic areas. The mechanisms that lead to cardiac fibrosis are diverse and incompletely characterized.

View Article and Find Full Text PDF

NigraNet: An automatic framework to assess nigral neuromelanin content in early Parkinson's disease using convolutional neural network.

Neuroimage Clin

December 2022

Paris Brain Institute - ICM, Sorbonne University, UPMC Univ Paris 06, INSERM U1127, CNRS UMR 7225, Pitié-Salpêtrière Hospital, Paris, France; Movement Investigations and Therapeutics Team (MOV'IT), ICM, Paris, France; Center for NeuroImaging Research - CENIR, ICM, Paris, France; Department of Neuroradiology, Pitié-Salpêtrière Hospital, AP-HP, Paris, France.

Background: Parkinson's disease (PD) demonstrates neurodegenerative changes in the substantia nigra pars compacta (SNc) using neuromelanin-sensitive (NM)-MRI. As SNc manual segmentation is prone to substantial inter-individual variability across raters, development of a robust automatic segmentation framework is necessary to facilitate nigral neuromelanin quantification. Artificial intelligence (AI) is gaining traction in the neuroimaging community for automated brain region segmentation tasks using MRI.

View Article and Find Full Text PDF

Corrigendum to "Venoarterial extracorporeal membrane oxygenation flow or dobutamine to improve microcirculation during ECMO for refractory cardiogenic shock" [Journal of Critical Care 71 (2022) Start page 1 - End page 1 /154090].

J Crit Care

December 2022

Sorbonne Université, UPMC Univ Paris 06, INSERM UMRS_1166-iCAN, Institute of Cardiometabolism and Nutrition, 75651 Paris Cedex 13, France; Publique-Hôpitaux de Paris, Pitié-Salpêtrière Hospital, Medical Intensive Care Unit, 75651 Paris Cedex 13, France. Electronic address:

View Article and Find Full Text PDF

Heterozygous pathogenic variants in DNM1 cause developmental and epileptic encephalopathy (DEE) as a result of a dominant-negative mechanism impeding vesicular fission. Thus far, pathogenic variants in DNM1 have been studied with a canonical transcript that includes the alternatively spliced exon 10b. However, after performing RNA sequencing in 39 pediatric brain samples, we find the primary transcript expressed in the brain includes the downstream exon 10a instead.

View Article and Find Full Text PDF

Contemporary ultraintense, short-pulse laser systems provide extremely compact setups for the production of high-flux neutron beams, such as those required for nondestructive probing of dense matter, research on neutron-induced damage in fusion devices or laboratory astrophysics studies. Here, by coupling particle-in-cell and Monte Carlo numerical simulations, we examine possible strategies to optimise neutron sources from ion-induced nuclear reactions using 1-PW, 20-fs-class laser systems. To improve the ion acceleration, the laser-irradiated targets are chosen to be ultrathin solid foils, either standing alone or preceded by a plasma layer of near-critical density to enhance the laser focusing.

View Article and Find Full Text PDF

Laboratory evidence of magnetic reconnection hampered in obliquely interacting flux tubes.

Nat Commun

October 2022

LULI - CNRS, CEA, UPMC Univ Paris 06 : Sorbonne Université, Ecole Polytechnique, Institut Polytechnique de Paris, F-91128, Paris, Palaiseau cedex, France.

Magnetic reconnection can occur when two plasmas, having anti-parallel components of the magnetic field, encounter each other. In the reconnection plane, the anti-parallel component of the field is annihilated and its energy released in the plasma. Here, we investigate through laboratory experiments the reconnection between two flux tubes that are not strictly anti-parallel.

View Article and Find Full Text PDF

Multiple fields in biological and medical research produce large amounts of point cloud data with high dimensionality and complexity. In addition, a large set of experiments generate point clouds, including segmented medical data or single-molecule localization microscopy. In the latter, individual molecules are observed within their natural cellular environment.

View Article and Find Full Text PDF

Along with their important diversity, coastal ecosystems receive various amounts of nutrients, principally arising from the continent and from the related human activities (mainly industrial and agricultural activities). During the 20th century, nutrients loads have increased following the increase of both the global population and need of services. Alongside, climate change including temperature increase or atmospheric circulation change has occurred.

View Article and Find Full Text PDF

Aggregates of charged metal particles obtained by electrostatic coupling with a compound of opposite charge in the vicinity of the net zero charge ratio are of interest in the field of plasmonics because the inter-particle distance is minimal, which favours plasmonic coupling. However, these structures present a low colloidal stability limiting the development of applications. In this article we show that globally neutral aggregates formed by electrostatic complexation of citrate-stabilized gold particles and a quaternized chitosan (i.

View Article and Find Full Text PDF

Freezing of gait depends on cortico-subthalamic network recruitment following STN-DBS in PD patients.

Parkinsonism Relat Disord

November 2022

Inserm 1127, Sorbonne Université, UPMC Univ Paris 06, UMRS 1127, CNRS, UMR 7225, Institut Du Cerveau et de la Moelle Epinière, F-75013, Paris, France; PANAM core Facility, Paris Brain Institute, Paris, France; Neurophysiology Department, Rouen University Hospital, CHU Rouen, F-76000, Rouen, France. Electronic address:

Introduction: Subthalamic deep-brain-stimulation (STN-DBS) is an effective means to treat Parkinson's disease (PD) symptoms. Its benefit on gait disorders is variable, with freezing of gait (FOG) worsening in about 30% of cases. Here, we investigate the clinical and anatomical features that could explain post-operative FOG.

View Article and Find Full Text PDF

The European Society of Cardiovascular Radiology (ESCR) is the European specialist society of cardiac and vascular imaging. This society's highest priority is the continuous improvement, development, and standardization of education, training, and best medical practice, based on experience and evidence. The present intra-society consensus is based on the existing scientific evidence and on the individual experience of the members of the ESCR writing group on carotid diseases, the members of the ESCR guidelines committee, and the members of the executive committee of the ESCR.

View Article and Find Full Text PDF

The European Society of Cardiovascular Radiology (ESCR) is the European specialist society of cardiac and vascular imaging. This society's highest priority is the continuous improvement, development, and standardization of education, training, and best medical practice, based on experience and evidence. The present intra-society consensus is based on the existing scientific evidence and on the individual experience of the members of the ESCR writing group on carotid diseases, the members of the ESCR guidelines committee, and the members of the executive committee of the ESCR.

View Article and Find Full Text PDF

Premature relativistic transparency of ultrathin, laser-irradiated targets is recognized as an obstacle to achieving a stable radiation pressure acceleration in the "light sail" (LS) mode. Experimental data, corroborated by 2D PIC simulations, show that a few-nm thick overcoat surface layer of high Z material significantly improves ion bunching at high energies during the acceleration. This is diagnosed by simultaneous ion and neutron spectroscopy following irradiation of deuterated plastic targets.

View Article and Find Full Text PDF

Evolutionary origin of vertebrate OCT4/POU5 functions in supporting pluripotency.

Nat Commun

September 2022

Novo Nordisk Foundation Center for Stem Cell Medicine (reNEW), University of Copenhagen, 3B Blegdamsvej, 2200, Copenhagen, Denmark.

Article Synopsis
  • Pluripotent cells are critical for development in eutherian embryos, transitioning from a naïve state to a primed state during gastrulation.
  • The study traces the evolution of the Pou5 gene family, especially the OCT4 protein, which is key for maintaining pluripotency, highlighting its emergence in early jawed vertebrates.
  • The research reveals that gene duplication led to the creation of two versions of Pou5 (Pou5f1 and Pou5f3), which have specialized roles in supporting different stages of pluripotency, thus enhancing their functions in cell self-renewal and differentiation.
View Article and Find Full Text PDF

Species and population genomic differentiation in Pocillopora corals (Cnidaria, Hexacorallia).

Genetica

October 2022

Aix Marseille Université, IRD, APHM, MEPHI, IHU Méditerranée Infection, 19-21 Boulevard Jean Moulin, 13005, Marseille, France.

Article Synopsis
  • Correctly defining species and populations is essential for understanding connectivity, adaptation, and conservation, especially in organisms like Scleractinian corals that have limited distinguishing features.
  • The study used RAD-sequencing to examine genetic differences and structure in Pocillopora spp. from Oman and French Polynesia, testing species hypotheses and site genetic variation.
  • Findings showed significant genetic differentiation between samples from the two regions, but little differentiation within those regions, highlighting the presence of clonal lineages and discussing how clonality affects genetic diversity.
View Article and Find Full Text PDF

The hypothalamus is a key vertebrate brain region involved in survival and physiological functions. Understanding hypothalamic organization and evolution is important to deciphering many aspects of vertebrate biology. Recent comparative studies based on gene expression patterns have proposed the existence of hypothalamic histogenetic domains (paraventricular, TPa/PPa; subparaventricular, TSPa/PSPa; tuberal, Tu/RTu; perimamillary, PM/PRM; and mamillary, MM/RM), revealing conserved evolutionary trends.

View Article and Find Full Text PDF

Sophorolipids are glycolipid biosurfactants consisting of a carbohydrate sophorose head with a fatty acid tail and exist in either an acidic or lactonic form. Sophorolipids are gaining interest as potential cancer chemotherapeutics due to their inhibitory effects on a range of tumour cell lines. Currently, most anti-cancer studies reporting the effects of sophorolipids have focused on lactonic preparations with the effects of acidic sophorolipids yet to be elucidated.

View Article and Find Full Text PDF

In this study, we report the synthesis of a new organic-inorganic molecular salt of the clinically used antifungal drug fluconazole, (H2Fluconazole).SnCl.2HO.

View Article and Find Full Text PDF
Article Synopsis
  • The study focused on critically ill COVID-19 patients aged 70 and older, comparing treatment outcomes between genders.
  • Male patients tended to be fitter than females and received more aggressive interventions like tracheostomy and renal replacement therapy.
  • However, there was no significant difference in 30-day mortality rates between male and female patients after considering factors like disease severity and frailty.
View Article and Find Full Text PDF

Theory and experiments for disordered elastic manifolds, depinning, avalanches, and sandpiles.

Rep Prog Phys

August 2022

Laboratoire de physique, Département de physique de l'ENS, École normale supérieure, UPMC Univ. Paris 06, CNRS, PSL Research University, 75005 Paris, France.

Domain walls in magnets, vortex lattices in superconductors, contact lines at depinning, and many other systems can be modeled as an elastic system subject to quenched disorder. The ensuing field theory possesses a well-controlled perturbative expansion around its upper critical dimension. Contrary to standard field theory, the renormalization group (RG) flow involves a function, the disorder correlator Δ(), and is therefore termed the functional RG.

View Article and Find Full Text PDF