522 results match your criteria: "Universite Paris Diderot Paris 7[Affiliation]"

Inhibitory receptors expressed by T cells mediate tolerance to tumor antigens, with coexpression of these receptors exacerbating this dysfunctional state. Using the VectraR automated multiparametric immunofluorescence technique, we quantified intratumoral CD8 T cells coexpressing the inhibitory receptors PD-1 and Tim-3 from patients with renal cell carcinoma (RCC). A second validation cohort measured the same parameters by cytometry.

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Ex vivo gene therapy in France.

Curr Res Transl Med

September 2018

Université Paris Diderot Paris 7, pôle biologie-pathologie-physiologie (B2P), groupe hospitalier Saint-Louis-Lariboisière-Fernand-Widal, 1, avenue Claude-Vellefaux, 75010 Paris, France.

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LPS-TLR4 Pathway Mediates Ductular Cell Expansion in Alcoholic Hepatitis.

Sci Rep

October 2016

Division of Gastroenterology and Hepatology, Departments of Medicine and Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.

Alcoholic hepatitis (AH) is the most severe form of alcoholic liver disease for which there are no effective therapies. Patients with AH show impaired hepatocyte proliferation, expansion of inefficient ductular cells and high lipopolysaccharide (LPS) levels. It is unknown whether LPS mediates ductular cell expansion.

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In multilevel settings such as individual participant data meta-analysis, a variable is 'systematically missing' if it is wholly missing in some clusters and 'sporadically missing' if it is partly missing in some clusters. Previously proposed methods to impute incomplete multilevel data handle either systematically or sporadically missing data, but frequently both patterns are observed. We describe a new multiple imputation by chained equations (MICE) algorithm for multilevel data with arbitrary patterns of systematically and sporadically missing variables.

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Assessing morphology and function of the semicircular duct system: introducing new in-situ visualization and software toolbox.

Sci Rep

September 2016

Université Paris Diderot-Paris 7, UFR de Mathématiques, Equipe Géométrie et Dynamique, Bâtiment Sophie Germain, 8 place Aurélie Nemours, 75013 Paris Cedex 13, France.

Article Synopsis
  • The semicircular duct system is crucial for balance and spatial awareness in vertebrates, primarily detecting head rotations.
  • A new non-invasive method involving X-ray micro tomography and tissue staining allows for detailed 3D visualization of these delicate structures.
  • The study introduces Ariadne, a software toolbox enhancing the analysis of visualized duct systems, with results from humans and primates demonstrating its potential impact on understanding balance biomechanics.
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Identification of Multiple Gene Mutations Accounts for a new Genetic Architecture of Primary Ovarian Insufficiency.

J Clin Endocrinol Metab

December 2016

Inserm 1185 (J.B., I.B., S.B., J.F., J.Y., N.B.), Le Kremlin-Bicêtre, Université Paris-Saclay, Faculté de Médecine Paris Sud, 94270 Le Kremlin-Bicêtre, France; Service de Biochimie et Génétique Moléculaire (K.A., C.B., C.D.), Hôpital Cochin, AP-HP, Université Paris-Descartes, 75004 Paris, France; Service d'Endocrinologie-Diabète-Nutrition (A.F., B.D.), CHU de Reims-Hôpital Robert-Debré, 51100 Reims, France; Institut Jacques Monod (A.L.T., R.A.V.), Université Paris Diderot-PARIS 7/CNRS UMR7592, 75013 Paris, France; and Service d'Endocrinologie et des Maladies de la Reproduction (J.Y.), APHP, Hôpital de Bicêtre, 94270 Le Kremlin-Bicêtre, France.

Context: Idiopathic primary ovarian insufficiency (POI) is a major cause of amenorrhea and infertility. POI affects 1% of women before age 40 years, and several genetic causes have been reported. To date, POI has been considered a monogenic disorder.

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Unlabelled: Cyanobacteria are ubiquitous micro-organisms that can produce toxic compounds, the cyanotoxins. The monitoring of such producers in the environment is of prime importance for human health. An attractive technology for such monitoring is fluorescence in situ hybridization (FISH), which allows the detection and enumeration of environmental micro-organisms.

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Exclusion of Patients with a Severe T-Cell Defect Improves the Definition of Common Variable Immunodeficiency.

J Allergy Clin Immunol Pract

October 2017

Department of Clinical Immunology, Hôpital Saint-Louis, Assistance Publique Hôpitaux de Paris (APHP), Paris, France; EA3518, Université Paris Diderot Paris 7, Paris, France. Electronic address:

Background: In 2014, the European Society for Immune Deficiencies (ESID) revised the common variable immunodeficiency (CVID) diagnosis criteria by incorporating new clinical and biological markers. The new definition appeared more restrictive but had not yet been evaluated in a large cohort of patients.

Objective: The objective of this study was to evaluate the impact of this new definition in a large cohort of patients with primary hypogammaglobulinemia.

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Unlabelled: Acute-on-chronic liver failure (ACLF) in cirrhosis is characterized by acute decompensation (AD), organ failure(s), and high short-term mortality. Recently, we have proposed (systemic inflammation [SI] hypothesis) that ACLF is the expression of an acute exacerbation of the SI already present in decompensated cirrhosis. This study was aimed at testing this hypothesis and included 522 patients with decompensated cirrhosis (237 with ACLF) and 40 healthy subjects.

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Background: Recent studies conducted in developed countries described hepatitis E virus (HEV) as an emerging infectious threat to blood safety. However, data on HEV among blood donors from southeast Asia are lacking.

Study Design And Methods: Between July and August 2014, we assessed the presence of HEV immunoglobulin (Ig)G and IgM in 301 Cambodian blood donors.

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ARCN1 Mutations Cause a Recognizable Craniofacial Syndrome Due to COPI-Mediated Transport Defects.

Am J Hum Genet

August 2016

Research Center for Epigenetic Disease, Institute of Molecular and Cellular Biosciences, The University of Tokyo, Tokyo 113-0032, Japan; CREST, Japan Science and Technology Agency, Kawaguchi, 332-0012, Japan.

Cellular homeostasis is maintained by the highly organized cooperation of intracellular trafficking systems, including COPI, COPII, and clathrin complexes. COPI is a coatomer protein complex responsible for intracellular protein transport between the endoplasmic reticulum and the Golgi apparatus. The importance of such intracellular transport mechanisms is underscored by the various disorders, including skeletal disorders such as cranio-lenticulo-sutural dysplasia and osteogenesis imperfect, caused by mutations in the COPII coatomer complex.

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[Sinonasal fungal infections are not exclusively due to mucorales and Aspergillus!].

Ann Pathol

August 2016

Service d'anatomie et cytologie pathologiques, faculté de médecine, université Paris Diderot - Paris 7, AP-HP Lariboisière, 2, avenue Ambroise-Paré, 75475 Paris, France.

Rhino-sinusal infections are serious diseases and possibly lethal. When they are invasive, we easily discuss apergilloses and mucormycoses. The confirmation of the diagnosis of mucormycosis need an extensive surgery for precise histopathological and mycological evaluation.

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Genomic Copy Number Profiling Using Circulating Free Tumor DNA Highlights Heterogeneity in Neuroblastoma.

Clin Cancer Res

November 2016

INSERM U830, Laboratoire de Génétique et Biologie des Cancers, Research Center, Institut Curie, Paris Sciences et Lettres Research University, Paris, France.

Purpose: The tumor genomic copy number profile is of prognostic significance in neuroblastoma patients. We have studied the genomic copy number profile of cell-free DNA (cfDNA) and compared this with primary tumor arrayCGH (aCGH) at diagnosis.

Experimental Design: In 70 patients, cfDNA genomic copy number profiling was performed using the OncoScan platform.

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Medical complications following splenectomy.

J Visc Surg

August 2016

Université Paris Diderot-Paris 7, Hôpital Beaujon, Service de Médecine Interne, 100, boulevard du Général-Leclerc, 92110 Clichy, France. Electronic address:

Splenectomy is attended by medical complications, principally infectious and thromboembolic; the frequency of complications varies with the conditions that led to splenectomy (hematologic splenectomy, trauma, presence of portal hypertension). Most infectious complications are caused by encapsulated bacteria (Meningococcus, Pneumococcus, Hemophilus). These occur mainly in children and somewhat less commonly in adults within the first two years following splenectomy.

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Pseudopilin residue E5 is essential for recruitment by the type 2 secretion system assembly platform.

Mol Microbiol

September 2016

Department of Microbiology, Laboratory of Macromolecular Systems and Signalling, Institut Pasteur, CNRS ERL3526, 25 rue du Dr Roux, 75724, Paris, Cedex 15, France.

Type II secretion systems (T2SSs) promote secretion of folded proteins playing important roles in nutrient acquisition, adaptation and virulence of Gram-negative bacteria. Protein secretion is associated with the assembly of type 4 pilus (T4P)-like fibres called pseudopili. Initially membrane embedded, pseudopilin and T4 pilin subunits share conserved transmembrane segments containing an invariant Glu residue at the fifth position, E5.

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[Chronic fatigue syndrome: A new disorder?].

Rev Med Interne

December 2016

Pôle biologie-pathologie-physiologie, hôpital Saint-Louis, AP-HP, université Paris-Diderot-Paris-7, 1, avenue Vellefaux, 75010 Paris, France.

More than 30 years after its individualization, chronic fatigue syndrome (CFS) remains a debilitating condition for the patient and a confusing one to the physicians, both because of diagnostic difficulties and poorly codified management. Despite the numerous work carried out, its pathophysiology remains unclear, but a multifactorial origin is suggested with triggering (infections) and maintenance (psychological) factors as well as the persistence of inflammatory (low grade inflammation, microglial activation…), immunologic (decrease of NK cells, abnormal cytokine production, reactivity to a variety of allergens, role of estrogens…) and muscular (mitochondrial dysfunction and failure of bioenergetic performance) abnormalities at the origin of multiple dysfunctions (endocrine, neuromuscular, cardiovascular, digestive…). The complexity of the problem and the sometimes contradictory results of available studies performed so far are at the origin of different pathophysiological and diagnostic concepts.

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Multiple acyl-CoA dehydrogenase deficiencies (MADDs) are a heterogeneous group of metabolic disorders with combined respiratory-chain deficiency and a neuromuscular phenotype. Despite recent advances in understanding the genetic basis of MADD, a number of cases remain unexplained. Here, we report clinically relevant variants in FLAD1, which encodes FAD synthase (FADS), as the cause of MADD and respiratory-chain dysfunction in nine individuals recruited from metabolic centers in six countries.

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Unconventional High-Energy-State Contribution to the Cooper Pairing in the Underdoped Copper-Oxide Superconductor HgBa_{2}Ca_{2}Cu_{3}O_{8+δ}.

Phys Rev Lett

May 2016

Laboratoire Matériaux et Phénomènes Quantiques (UMR 7162 CNRS), Université Paris Diderot-Paris 7, Bâtiment Condorcet, 75205 Paris Cedex 13, France.

We study the temperature-dependent electronic B_{1g} Raman response of a slightly underdoped single crystal HgBa_{2}Ca_{2}Cu_{3}O_{8+δ} with a superconducting critical temperature T_{c}=122  K. Our main finding is that the superconducting pair-breaking peak is associated with a dip on its higher-energy side, disappearing together at T_{c}. This result reveals a key aspect of the unconventional pairing mechanism: spectral weight lost in the dip is transferred to the pair-breaking peak at lower energies.

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[Negotiating knowledge and power: the National Policy for Comprehensive Men's Healthcare and the Brazilian Society of Urology].

Hist Cienc Saude Manguinhos

July 2017

Psicanalista; professor, Instituto de Psicologia/UFRJ; pesquisador e professor,Brasil.

The aim of this article is to demonstrate the negotiations and disputes between different kinds of knowledge and power in the history of the Brazilian National Policy for Comprehensive Men's Healthcare based on the creation in 2008 of the Technical Area for Men's Health within the Ministry of Health's Department of Strategic Programs. We observed the Brazilian Society of Urology's position as the policy was being drawn up, including the discourse adopted, based on interviews held with managers from the Ministry of Health and the assistant representative of the United Nations Population Fund in Brazil. We analyzed the visibility of the male body in signs of resistance to the interventions of biopower in the expression of the right to health.

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Article Synopsis
  • Tyrosine kinase inhibitors (TKIs) have significantly improved survival rates in chronic myeloid leukemia (CML) patients, particularly when molecular residual disease is undetectable.
  • Despite deep molecular responses, BCR-ABL1-expressing leukemic stem cells (LSCs) were found to persist in some patients, raising concerns about the risk of relapse upon TKI therapy discontinuation.
  • A study showed that LSCs were detectable in a minority of patients, and while TKI discontinuation led to rapid relapses in some, those who continued TKI therapy did not experience relapse, highlighting the challenges in managing CML.
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Investigating covariate-by-centre interaction in survival data.

Stat Methods Med Res

March 2018

1 Service de Biostatistique et Information Médicale, AP-HP Hôpital Saint-Louis, Paris, France.

In survival analysis, assessing the existence of potential centre effects on the baseline hazard or on the effect of fixed covariates on the baseline hazard, such as treatment-by-centre interaction, is a frequent clinical concern in multicentre studies. Survival models with random effects on the baseline hazard and/or on the effect of the covariates of interest have been largely applied, for instance, to investigate potential centre effects. We aimed to develop a procedure to routinely test for multiple random effects in survival analyses.

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Intertwined Multiple Spiral Fracture in Perforated Sheets.

Phys Rev Lett

April 2016

PMMH, CNRS UMR 7636, UPMC, Université Paris 6 and Université Paris Diderot Paris 7, ESPCI Paris, 10 rue Vauquelin, 75231 Paris Cedex 05, France.

We study multiple tearing of a thin, elastic, brittle sheet indented with a rigid cone. The n cracks initially prepared symmetrically propagate radially for n≥4. However, if n<4 the radial symmetry is broken and fractures spontaneously intertwine along logarithmic spiral paths, respecting order n rotational symmetry.

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Article Synopsis
  • The study investigates how the marine alga Ostreococcus tauri adapts to low iron availability in ocean surface waters, leveraging its compact genome and genetic manipulability for research purposes.* -
  • Researchers used RNA sequencing to discover that iron uptake and metabolism in O. tauri are regulated by day/night cycles and identified key proteins involved, such as a ZIP-family protein and a new Fea1-related protein.* -
  • Unlike other algal models, O. tauri does not have traditional iron uptake mechanisms and instead shows a coordinated response to iron limitation by adjusting gene expression related to zinc and optimizing its cellular functions.*
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