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

Article Synopsis
  • The study investigates how competing risks, like allograft failure and death with a functioning graft, affect the performance of prognostic models used for kidney transplant recipients.
  • The research involves 11,046 kidney transplant recipients across 10 countries, developing models using various regression techniques to predict long-term graft failure while carefully evaluating their accuracy and reliability.
  • Results indicate that both standard Cox models and competing risk models provide similar predictions for graft failure, with high concordance indices, confirming their usefulness in clinical settings.
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Special Issue: "Molecular Dynamics Simulations and Structural Analysis of Protein Domains".

Int J Mol Sci

October 2024

DSIMB Bioinformatics Team, BIGR, INSERM, Université Paris Cité, F-75015 Paris, France.

The 3D protein structure is the basis for all their biological functions [...

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Background: The prescription of antitumor drugs has often been associated with drug-related problems. Pretherapeutic multidisciplinary risk assessment programs including pharmaceutical care have been established to secure the initiation of injectable and oral antitumor therapies. This prospective cross-sectional double-center study evaluated the clinical and economic impact of the pharmacist in detecting drug-related problems in patients initiating antitumor therapies.

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Article Synopsis
  • - SARS-CoV-2 has evolved to evade current monoclonal antibodies (mAbs), emphasizing the need for more resilient treatments that can neutralize various viral strains.
  • - A new human mAb called VIR-7229 has shown the ability to effectively neutralize multiple variants of SARS-CoV-2 and other related viruses, due to its unique targeting of a critical viral region known as the receptor-binding motif (RBM).
  • - VIR-7229 demonstrates a high resistance to the emergence of virus escape mutants, making it a promising candidate for future therapies against evolving coronaviruses.
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Dynamic contrast enhanced MRI demonstrate altered placental perfusion in the STOX1A preeclampsia mouse model.

Placenta

December 2024

Maternité, Obstétrique, Médecine, Chirurgie et Imagerie Fœtales, Hôpital Necker-Enfants malades, APHP, et Plateforme LUMIERE, URP7328, Université Paris Cité, Paris, France. Electronic address:

Article Synopsis
  • Preeclampsia is a pregnancy-related condition linked to placental problems, studied in mice using the STOX1A model which simulates symptoms like high blood pressure and protein in urine.
  • The study compared placental perfusion in two groups of pregnant mice (TgSTOX13 vs. wild-type) using advanced imaging techniques to measure blood flow and other health indicators.
  • Results showed that the TgSTOX13 group had significantly higher blood pressure, protein levels in urine, and lower fetal weights, along with a 30% reduction in placental blood flow, reflecting similar issues seen in human preeclampsia cases.
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Article Synopsis
  • CFTR is an anion channel that evolved from ABC transporters and has a unique structure with a lateral portal that attracts anions from the cytoplasm to its interior.
  • Using molecular dynamics simulations and biochemical assays, the study examines specific amino acids involved in CFTR regulation, particularly focusing on R1158, R1030, and W846.
  • Mutating these amino acids boosts channel activity and allows opening by potentiators without needing increased cAMP levels, highlighting a new critical area in CFTR's regulatory mechanism located in its membrane-spanning domain 2.
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Lateral inhibition mediates alternative cell fate decision and produces regular cell fate patterns with fate symmetry breaking (SB) relying on the amplification of small stochastic differences in Notch activity via an intercellular negative-feedback loop. Here, we used quantitative live imaging of endogenous Scute (Sc), a proneural factor, and of a Notch activity reporter to study the emergence of sensory organ precursor cells in the pupal abdomen of Drosophila. SB was observed at low Sc levels and was not preceded by a phase of intermediate Sc expression and Notch activity.

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Background: Diabetic foot ulcers are chronic, difficult to heal, and potentially life-threatening. Few medical devices have been studied in diabetic ulcers penetrating to bone or tendon.

Methods: We conducted an international, open-label randomized controlled trial, randomly assigning patients with diabetic ulcers penetrating to bone, joint, or tendon 1:1 to intact fish skin graft or standard wound care, with assigned treatment applied through 14 weeks.

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Leptospira interrogans biofilm transcriptome highlights adaption to starvation and general stress while maintaining virulence.

NPJ Biofilms Microbiomes

September 2024

Leptospirosis Research and Expertise Unit, Institut Pasteur de Nouvelle-Calédonie, Institut Pasteur International Network, Nouméa, New Caledonia.

Life-threatening Leptospira interrogans navigate a dual existence: surviving in the environment and infecting mammalian hosts. Biofilm formation is presumably an important survival strategy to achieve this process. Understanding the relation between biofilm and virulence might improve our comprehension of leptospirosis epidemiology.

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Article Synopsis
  • A study called FABRYDIAL aimed to determine how common Fabry disease (FD) is among dialysis patients aged 18 to 74 in France, involving 124 dialysis centers and excluding cases of nephropathy unrelated to FD.
  • Out of 6,032 targeted patients, 3,088 (73.6%) were included, with biochemical and genetic tests conducted on samples to identify potential cases of FD.
  • The findings revealed a low prevalence of FD: 0.058% in males, 0% in females, and 0.035% overall, suggesting that while rare, signs of FD should be investigated in patients with unexplained kidney issues due to its serious implications if diagnosed early.
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Dysregulated RNA metabolism caused by SMN deficiency leads to motor neuron disease spinal muscular atrophy (SMA). Current therapies improve patient outcomes but achieve no definite cure, prompting renewed efforts to better understand disease mechanisms. The calcium channel blocker flunarizine improves motor function in -deficient mice and can help uncover neuroprotective pathways.

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Inflammatory bowel diseases (IBDs) involve chronic inflammation of the gastrointestinal tract, where effector CD4 T-cells play a central role. Thereby, the recruitment of T-cells into the colonic mucosa represents a key process in IBD. We recently found that CCR9 and DRD5 might form a heteromeric complex on the T-cell surface.

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Article Synopsis
  • Endovascular ultrasound renal denervation (uRDN) was shown to lower blood pressure effectively over 36 months in patients with resistant hypertension in the RADIANCE-HTN TRIO trial.
  • The trial involved 69 patients receiving uRDN and 67 patients receiving a sham procedure, with follow-up showing significant blood pressure reductions from baseline and screening measurements.
  • Results indicated that uRDN maintained its effectiveness without major safety issues throughout the 36-month follow-up period.
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Chromatin assembly factor subunit CHAF1A as a monogenic cause for oculo-auriculo-vertebral spectrum.

Eur J Hum Genet

January 2025

Laboratoire « Embryologie et Génétique des Malformations », Institut Imagine, INSERM UMR1163, Université Paris Cité, Paris, France.

Oculo-auriculo-vertebral spectrum (OAVS) is characterized by abnormal development of the 1st and 2nd branchial arches. Despite arguments against a monogenic condition, a few genes have been involved in a minority of cases. We now report heterozygous, presumably loss-of function variants in the CHAF1A gene in 8 individuals, including 3 members of the same family.

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Involvement of kinases in memory consolidation of inhibitory avoidance training.

Rev Neurosci

September 2024

Departamento de Neurobiología Conductual y Cognitiva, Instituto de Neurobiología, Campus Juriquilla, Universidad Nacional Autónoma de México, Querétaro, Qro., 76230, Mexico.

The inhibitory avoidance (IA) task is a paradigm widely used to investigate the molecular and cellular mechanisms involved in the formation of long-term memory of aversive experiences. In this review, we discuss studies on different brain structures in rats associated with memory consolidation, such as the hippocampus, striatum, and amygdala, as well as some cortical areas, including the insular, cingulate, entorhinal, parietal and prefrontal cortex. These studies have shown that IA training triggers the release of neurotransmitters, hormones, growth factors, etc.

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RNA stability, important for eukaryotic gene expression, is thought to depend on deadenylation rates, with shortened poly(A) tails triggering decapping and 5' to 3' degradation. In contrast to this view, recent large-scale studies indicate that the most unstable mRNAs have, on average, long poly(A) tails. To clarify the role of deadenylation in mRNA decay, we first modeled mRNA poly(A) tail kinetics and mRNA stability in yeast.

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Health literacy and the use of digital tools in older patients with cancer and their younger counterparts: A multicenter, nationwide study.

Patient Educ Couns

January 2025

Univ. Bordeaux, Inserm, Bordeaux Population Health Research Center, Epicene team, UMR, 1219, Bordeaux, France; Inserm CIC1401, Clinical and Epidemiological Research Unit, Institut Bergonie, Comprehensive Cancer Center, Bordeaux, France.

Article Synopsis
  • The study looked at health literacy (HL) in cancer patients aged 65 and older compared to those aged 18-64 in France.
  • It found that older patients used digital tools less often and had lower HL scores than younger patients.
  • The results suggest that it's really important for doctors to pay attention to health literacy so they can help patients understand their health better, especially those who may struggle with it.
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CHARMM at 45: Enhancements in Accessibility, Functionality, and Speed.

J Phys Chem B

October 2024

Harvard University, Department of Chemistry and Chemical Biology, Cambridge, Massachusetts 02138, United States.

Since its inception nearly a half century ago, CHARMM has been playing a central role in computational biochemistry and biophysics. Commensurate with the developments in experimental research and advances in computer hardware, the range of methods and applicability of CHARMM have also grown. This review summarizes major developments that occurred after 2009 when the last review of CHARMM was published.

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Disrupted basolateral amygdala circuits supports negative valence bias in depressive states.

Transl Psychiatry

September 2024

Institut Pasteur, Université Paris Cité, Centre National de la Recherche Scientifique, Unité Mixte de Recherche 3571, Perception and Action Unit, F-75015, Paris, France.

Article Synopsis
  • * A study using a mouse model of depression revealed that chronic stress alters brain circuits in the basolateral amygdala, affecting how positive and negative stimuli are processed.
  • * Key findings suggest that negatively biased stimulus processing can be improved by stimulating certain neural pathways, highlighting potential targets for depression treatment.
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High-resolution kinetics and cellular determinants of SARS-CoV-2 antibody response over two years after COVID-19 vaccination.

Microbes Infect

September 2024

ISGlobal, Barcelona, Spain; Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona (UB), Barcelona, Spain; CIBER de Enfermedades Infecciosas (CIBERINFEC), Barcelona, Spain. Electronic address:

Article Synopsis
  • - The study examined the antibody responses of 31 healthy adults over two years following COVID-19 vaccination, revealing significant differences in antibody kinetics for IgM, IgA, and IgG types, with IgG levels decaying slowly and IgM levels dropping rapidly after vaccination.
  • - Three booster doses of the vaccine increased and prolonged the levels of anti-spike IgG and IgA antibodies, while infection produced the highest antibody peak and slowest decay, compared to the two-dose regimen.
  • - The research found that antibody levels against Omicron variants decreased more quickly than those against the original virus, and that strong T-cell responses were linked to enhanced IgA production.
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Lipid remodeling in context of cellular senescence.

Biochimie

December 2024

Université Paris Cité, CNRS, INSERM, Institut Necker Enfants Malades-INEM, F-75015, Paris, France. Electronic address:

Cellular senescence is a response that irreversibly arrests stressed cells thus providing a potent tumor suppressor mechanism. In parallel, senescent cells exhibit an immunogenic secretome called SASP (senescence-associated secretory phenotype) that impairs tissue homeostasis and is involved in numerous age-related diseases. Senescence establishment is achieved through the unfolding of a profound transcriptional reprogramming together with morphological changes.

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Article Synopsis
  • The human immune system continues to develop for several years after birth, affecting how young children respond to infections, such as SARS-CoV-2.
  • Researchers studied T cell responses in children and adults before, during, and after SARS-CoV-2 infection, revealing that younger children (under 5) had a weaker CD4 T cell response compared to older children and adults with mild disease.
  • Following infection, preschool-age children produced similar neutralizing antibodies to adults but had different T cell characteristics and fewer memory B cells, indicating a gradual maturation of their adaptive immune responses.
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Rare primary liver cancers: An EASL position paper.

J Hepatol

July 2024

Centre de Recherche des Cordeliers, Université Paris Cité, Sorbonne Université, Inserm, F-75006, Paris, France; Institut du Cancer Paris CARPEM, AP-HP, Department of Oncology, Hopital Européen Georges Pompidou, F-75015, Paris, France.

Article Synopsis
  • Recent advancements in understanding liver cancer (hepatocarcinogenesis) have led to increased interest in rare primary liver cancers (PLCs) like combined hepatocellular-cholangiocarcinoma, fibrolamellar carcinoma, and hepatic epithelioid hemangioendothelioma.
  • An international panel of experts has compiled information on the causes, diagnosis, and treatment of these rare PLCs.
  • While clinical trials for some of these cancers are in progress, there's a clear need for more research and collaboration across nations to improve outcomes.
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In this multicenter study conducted in France, we challenged the hypothesis of the transmission of pathogens other than spp. in 22 patients developing erythema migrans following a tick bite. Using a combination of high-throughput microfluidic PCRs and agnostic metagenomics on skin biopsies and blood samples, no microorganisms other than spp.

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