Publications by authors named "G. Besnard"

This study investigates food odour perception and affective response within a virtually simulated spacecraft environment, with links to the volatile composition of odours. Healthy participants (n = 44) between the ages of 18-39 years rated the intensity of eight food odours in two simulated space environments for comparison, a 'microgravity' posture (MicroG Posture; physical) and Virtual Reality (VR; visual-spatial cues) simulation of a spacecraft. Results indicate that these methods yield different outcomes.

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Background And Purpose: Around 30% of patients with epilepsy show drug-resistant epilepsy (DRE). While cannabidiol has demonstrated efficacy as an adjunctive treatment in Dravet syndrome (DS), Lennox-Gastaut Syndrome (LGS), and epilepsy related to tuberous sclerosis complex (TSC), its more global effectiveness in adult patients with DRE apart from these three specific contexts needs to be clarified.

Methods: We conducted a retrospective study at the epilepsy unit of Pitié Salpêtrière Hospital.

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Article Synopsis
  • A series of chiral Cr complexes were created to study their circularly polarized luminescence (CPL) in the near-infrared (NIR) range at room temperature.
  • The researchers synthesized both homoleptic and heteroleptic complexes, then separated and isolated their enantiomers using chiral stationary phase high-performance liquid chromatography (HPLC).
  • The findings demonstrated that different ligand substitutions significantly affect the luminescence properties of the complexes, revealing distinct polarized emission bands linked to specific metal-centered transitions.
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  • Glutathione synthetase deficiency is a rare genetic disorder caused by mutations in the GSS gene, leading to varying severity levels, from mild hemolytic anemia to severe neurological issues and even neonatal death.
  • A study on two fetal siblings revealed multiple congenital anomalies, such as limb malformations, cleft palate, and heart defects, linked to specific genetic variants in the GSS gene.
  • Genome sequencing and analysis indicated that these genetic variants likely caused disruptions in protein expression and metabolic processes, suggesting a broader range of phenotypic effects associated with glutathione synthetase deficiency.
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  • Autoimmune polyendocrine syndrome type 1 (APS-1) is a severe genetic disorder resulting from AIRE deficiency, leading to self-reactive T cells causing autoimmune damage in various organs.
  • The study investigated the role of interferon-γ in APS-1 by analyzing patient samples and conducting experiments with mice, finding that high levels of interferon-γ correlate with disease activity.
  • Treatment with the JAK inhibitor ruxolitinib significantly reduced interferon-γ levels and improved symptoms in APS-1 patients, suggesting that targeting this pathway may be a viable therapeutic approach.
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Background: Nine male and eight female calves born to a Normande artificial insemination bull named "Ly" were referred to the French National Observatory of Bovine Abnormalities for multiple fractures, shortened gestation, and stillbirth or perinatal mortality.

Results: Using Illumina BovineSNP50 array genotypes from affected calves and 84 half-sib controls, the associated locus was mapped to a 6.5-Mb interval on chromosome 19, assuming autosomal inheritance with germline mosaicism.

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The inclusion of boron atoms into chiral π-conjugated systems is an effective strategy to unlock unique chiroptical properties. Herein, the preparation and characterization of a configurationally stable axially-chiral boramidine are reported, showcasing absorption in the UV domain, deep-blue fluorescence ( up to 94%), and |10| and values. Detailed photophysical studies and quantum-chemical calculations clearly elucidate the deactivation pathways of the emissive state to triplet excited states, involving increased spin-orbit coupling between the lowest singlet excited state and an upper triplet state.

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Self-incompatibility (SI) has evolved independently multiple times and prevents self-fertilization in hermaphrodite angiosperms. Several groups of Oleaceae such as jasmines exhibit distylous flowers, with two compatibility groups each associated with a specific floral morph. Other Oleaceae species in the olive tribe have two compatibility groups without associated morphological variation.

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Study Question: Is there a cumulative toxicity of disposables used in IVF procedures?

Summary Answer: A toxicity may be detected when consumables are used cumulatively, while no toxicity is detected when the same consumables are used and tested individually.

What Is Known Already: Many components of items used in IVF laboratories may impair human embryonic development. Consequently, it is necessary to screen all reagents and materials which could be in contact with gametes and embryos.

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The interest in Cr(III) complexes has been renewed over the past decades for building practical guidelines in the design of efficient earth-abundant phosphorescent near-infrared emitters. In that context, we report the first family of homoleptic tri(didentate) Cr(III) complexes [Cr] based on polyaromatic ligands inducing 6-membered chelate rings, namely, the bis(1-methylimidazol-2-yl)ketone ( = bik), bis(1-methylimidazol-2-yl)methane ( = bim), and bis(1-methylimidazol-2-yl)ethane ( = bie) ligands. The programmed close-to-perfect octahedral microsymmetry of {CrN} chromophores found in [Cr(bik)](OTf) (), [Cr(bim)](OTf) (), and [Cr(bie)](BF) () ensures a ligand-field strength large enough to induce intense and long-lived Cr-based phosphorescence.

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Ameloblasts are specialized epithelial cells in the jaw that have an indispensable role in tooth enamel formation-amelogenesis. Amelogenesis depends on multiple ameloblast-derived proteins that function as a scaffold for hydroxyapatite crystals. The loss of function of ameloblast-derived proteins results in a group of rare congenital disorders called amelogenesis imperfecta.

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Hydrogen bonding greatly influences rates and equilibrium positions of chemical reactions, conformations, and sometimes even stereochemistry. This study reports on tetranitrofluorenone oximate, a novel dye capable of naked-eye detection of hydrogen-bond donating species (HBDs) and of rapid determination of H-bond donation strength by hypsochromic shift monitoring. In addition, the molecule possesses atropisomeric conformations, of M and P configuration, as evidenced in solid and solution state studies by X-ray diffraction and electronic circular dichroism (ECD), respectively.

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A chiral bispyrene macrocycle designed for exclusive intermolecular excimer fluorescence upon aggregation was synthesized by a double hydrothiolation of a bis-enol ether macrocycle followed by intramolecular oxidation of free thiols. Unusually high stereoselectivity was achieved for the thiol-ene additions under templated conditions and Et B/O radical initiation. After enantiomer separation (chiral stationary phase HPLC), aqueous conditions provoked aggregation.

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Article Synopsis
  • SpliceAI is a powerful algorithm for predicting splicing defects in DNA, but it has drawbacks like difficult-to-interpret outputs, delta scores that can obscure severe issues, and limited handling of complex variations.
  • SpliceAI-visual is a new online tool that addresses these issues by using raw scores, offering a user-friendly graphical output, and being able to analyze complex genetic variants.
  • The tool is accessible as a Google Colab notebook and integrated into the MobiDetails variant interpretation platform, enhancing the assessment of splicing defects and facilitating the understanding of complex cases.
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A straightforward two-step synthesis protocol affords a series of chiral amide-based bis-pyridine substituted polyether macrocycles. One ligand is particularly able to complex terbium(III) ions spontaneously. Upon complexation, interesting chiroptical properties are observed both in absorbance (ECD) and in fluorescence (CPL).

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Chiral quinacridines react up to four times, step-by-step, with α-diazomalonates under Ru and Rh catalysis. By selecting the catalyst, [CpRu(CH CN) ][PF ] (Cp=cyclopentadienyl) or Rh (oct) , chemo and regioselective insertions of derived metal carbenes are achieved in favor of mono- or bis-functionalized malonate derivatives, respectively, (r.r.

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Purpose: WNK3 kinase (PRKWNK3) has been implicated in the development and function of the brain via its regulation of the cation-chloride cotransporters, but the role of WNK3 in human development is unknown.

Method: We ascertained exome or genome sequences of individuals with rare familial or sporadic forms of intellectual disability (ID).

Results: We identified a total of 6 different maternally-inherited, hemizygous, 3 loss-of-function or 3 pathogenic missense variants (p.

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Covalent tRNA modifications play multi-faceted roles in tRNA stability, folding, and recognition, as well as the rate and fidelity of translation, and other cellular processes such as growth, development, and stress responses. Mutations in genes that are known to regulate tRNA modifications lead to a wide array of phenotypes and diseases including numerous cognitive and neurodevelopmental disorders, highlighting the critical role of tRNA modification in human disease. One such gene, THUMPD1, is involved in regulating tRNA N4-acetylcytidine modification (ac4C), and recently was proposed as a candidate gene for autosomal-recessive intellectual disability.

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Objective: The European System for Cardiac Operative Risk Evaluation II (EuroSCORE II) initially developed for predicting early postoperative mortality of all types of cardiac surgery, is less able to predict, more specifically, long-term outcomes after aortic valve replacement (AVR). The study authors here evaluated the risk factors for three-year mortality after isolated aortic valve replacement (AVR) for severe calcified tricuspid aortic valve stenosis and compared them with EuroSCORE II to predict long-term outcomes.

Design: A retrospective study.

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Life-history theory predicts that animals should develop adaptive trade-offs between survival and reproduction to maximize their fitness. This results in a continuum of life-history strategies among species, ranging from slow to fast paces-of-life. The optimal pace-of-life has been shown to vary within environmental gradients, with a commonly observed pattern of a slow-to-fast continuum from the tropics to the poles.

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Achiral [2]catenanes composed of rings with inequivalent sides may adopt chiral co-conformations. Their stereochemistry depends on the relative orientation of the interlocked rings and can be controlled by sterics or an external stimulus (e.g.

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The Laperrine's olive is endemic to the Saharan Mountains. Adapted to arid environments, it may constitute a valuable genetic resource to improve water-stress tolerance in the cultivated olive. However, limited natural regeneration coupled with human pressures make it locally endangered in Central Sahara.

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Previous studies suggest that altered gravity levels during parabolic flight maneuvers affect spatial updating. Little is known about the impact of the experimental setting and psychological stressors associated with parabolic flight experiments on attentional processes. To address this gap, we investigated the level of alertness, selective and sustained attention in 1 and 0 g using a Go/No-Go Continuous Performance Task.

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A series of highly emissive inert and chiral Cr complexes displaying dual circularly polarized luminescence (CPL) within the NIR region have been prepared and characterized. The helical [Cr(dqpR) ] (dqp=2,6-di(quinolin-8-yl)pyridine; R=OCH , Br or C≡CH) complexes were synthesized as racemic mixtures and resolved into their respective PP and MM enantiomers by chiral stationary phase HPLC. The corresponding enantiomers show large g ≈0.

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Purpose: The main objective of this study was to provide further information concerning the validity of patient-reported executive function (EF) in survivors of primary brain tumor (PBT) compared with a report provided by each patient's caregiver.

Methods: Forty survivors of PBT, 40 non-cancer controls and their proxies completed an assessment of functional executive disorders (e.g.

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