4,214 results match your criteria: "France and Universit´e de Rennes 1[Affiliation]"

Metallogels: a novel approach for the nanostructuration of single-chain magnets.

Mater Horiz

February 2023

Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, Université de Rennes 1, F-35000 Rennes, France.

In this study we demonstrate that single-chain magnets (SCMs) can be assembled in gel phase and transferred intact on surface. We take advantage of a family of SCMs based on Tb ions and nitronyl-nitroxides radicals functionalized with short alkyl chains known to form crystalline supramolecular nanotubes interacting with heptane acting as crystallizing solvent. When the radicals are functionalized with long aliphatic chains a robust gel is formed with similar structural and functional properties respect to its crystalline parent.

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Introduction: Surgical techniques of radical and partial nephrectomy have changed over the last 20years. Indications for partial nephrectomy have widened and mini-invasive surgery (laparoscopy and robotic assistance) has become widely used. However, both still have a significant morbidity.

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Besides phenotypic antimicrobial susceptibility testing (AST), whole genome sequencing (WGS) is a promising alternative approach for detection of resistance phenotypes. The aim of this study was to investigate the concordance between WGS-based resistance prediction and phenotypic AST results for enterococcal clinical isolates using a user-friendly online tools and databases. A total of 172 clinical isolates (34 E.

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Unmet Needs in TAVR: Conduction Disturbances and Management of Coronary Artery Disease.

J Clin Med

October 2022

Department of Medical and Surgical Sciences, Division of Cardiology, Magna Graecia University, 88100 Catanzaro, Italy.

Over the past two decades, transcatheter aortic valve replacement (TAVR) swiftly evolved from a disrupting technology towards mainstream therapy in the field of severe symptomatic aortic stenosis. A series of randomized evaluations established its role in treating severe aortic stenosis patients across all surgical risk categories, paving the way for an extension of its indications to younger low-risk patients with a longer life expectancy. Therefore, managing comorbidities and limiting procedural complications, which may affect long-term outcomes, is of paramount importance.

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European flounder foraging movements in an estuarine nursery seascape inferred from otolith microchemistry and stable isotopes.

Mar Environ Res

December 2022

UMR 7208 BOREA (MNHN, CNRS, IRD, SU, UCN, UA), Laboratoire de Biologie des Organismes et Ecosystèmes Aquatiques, Paris, France; MNHN, Station Marine de Dinard, CRESCO, Dinard, France.

Despite the importance of estuarine nurseries in the regulation of many fish stocks, temporal and spatial movements and habitat use patterns of juvenile fish remain poorly understood. Overall, combining several movement metrics allowed us to characterize dispersal patterns of juvenile flounder, Platichthys flesus, along an estuarine seascape. Specifically, we investigated otolith microchemistry signatures (Sr:Ca and Ba:Ca ratios) and stable isotope ratios (δC and δN) in muscles of these juveniles, during three consecutive years to assess inter-annual fluctuations in their home range and isotopic niches.

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Validity of Ultra-Short-Term HRV Analysis Using PPG-A Preliminary Study.

Sensors (Basel)

October 2022

Laboratoire Traitement du Signal et de l'Image (LTSI-Inserm UMR 1099), Université de Rennes 1, 35042 Rennes, France.

Continuous measurement of heart rate variability (HRV) in the short and ultra-short-term using wearable devices allows monitoring of physiological status and prevention of diseases. This study aims to evaluate the agreement of HRV features between a commercial device (Bora Band, Biosency) measuring photoplethysmography (PPG) and reference electrocardiography (ECG) and to assess the validity of ultra-short-term HRV as a surrogate for short-term HRV features. PPG and ECG recordings were acquired from 5 healthy subjects over 18 nights in total.

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The aim of the present study was to evaluate evolution and prognosis of mucinous ovarian carcinomas (mOC), with respect to the two invasive patterns: expansile and infiltrative invasion. This was a descriptive, retrospective, multicenter study conducted in 13 French centres from 1 January 2001 to 31 December 2019. All patients operated on for epithelial ovarian neoplasia of the mucinous type (infiltrative/expansile) were included, whether the surgery was performed immediately or after neoadjuvant chemotherapy.

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Decoupling carry-over effects from environment in fish nursery grounds.

Sci Total Environ

January 2023

Université de Rennes 1, UMR 7208 BOREA (MNHN, CNRS, IRD, SU, UCN, UA), Campus de Beaulieu, 35000 Rennes, France.

Life-history trait expression not only depends on the current environmental constraints, but also on the past ones that shaped traits expressed earlier in life. Such an effect, named carry-over, can occur in fish nursery grounds when juvenile performances after settlement are influenced by their larval traits in combination with conditions experienced in nurseries. To date, the impacts of environmental and human stressors on post-settlement traits have been assessed, but independently from larval traits, so that the contributions of environmental versus carry-over constraints remain unquantified.

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CD95 is a death receptor that can promote oncogenesis through molecular mechanisms that are not fully elucidated. Although the mature CD95 membrane receptor is considered to start with the arginine at position 17 after elimination of the signal peptide, this receptor can also be cleaved by MMP7 upstream of its leucine at position 37. This post-translational modification occurs in cancer cells but also in normal cells such as peripheral blood leukocytes.

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The first Covid-19 lockdown changed medical and care practices. Although positive patients were prioritised and the focus was on the efficiency of the intensive care units, the relational aspect of care is central to the philosophy of French Care Centres for Support and Prevention in Addictology (CSAPA in French). The caregivers were impacted by restrictive aseptic protocols, with an increased risk of patients, that are already very vulnerable, abandoning or not following-up their treatment.

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Stomach content and stable isotope analyses provide complementary insights into the trophic ecology of coastal temperate bentho-demersal assemblages under environmental and anthropogenic pressures.

Mar Environ Res

December 2022

Université de Rennes 1, BOREA, Muséum National d'Histoire Naturelle, Sorbonne Université, Université de Caen Normandie, Université des Antilles, Campus de Beaulieu, 35000, Rennes, France.

Assessing organic matter fluxes and species interactions in food webs is of main interest to understand the ecological functioning in bays and estuaries characterised by a wide diversity of primary producers and consumers. Demersal fish and cephalopod assemblages were studied across a network of 24 shallow subtidal stations in the bay of Saint-Brieuc for their diversity, stable isotope compositions and stomach contents. The community was composed of 21 taxa, eight species accounting for 94.

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The reaction between the 2-(1-(2,6-di(pyrazol-1-yl)-4-methylpyridyl)-4,5-(4,5-bis(propylthio)-tetrathiafulvalenyl)-1-benzimidazol-2-yl)-pyridine ligand (L), 1 equivalent of Ln(hfac)·2HO/Dy(tta)·2HO (hfac = 1,1,1,5,5,5-hexafluoroacetylacetonate, tta = 2-thenoyltrifluoroacetonate) and M(hfac)·2HO leads to the formation of heteroleptic 3d-4f dinuclear complexes of formula [MLn(hfac)(L)] (M(II) = Cd, Zn, Co, Mn, Ni and Ln(III) = Dy, Yb, Nd) and [ZnDy(tta)(hfac)(L)]·(CHCl). Their X-ray structures reveal that the two coordination sites are occupied by one Ln(III) ion and one M(II) transition metal respectively. The M(II) ions are coordinated to the benzoimidazolylpyridine (bzip) moiety in a NO coordination sphere, while the Ln(III) ions are coordinated to the 2,6-di(pyrazol-1-yl)-4-pyridine (dpp) moiety in a NO surrounding.

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Impact of procedural success on clinical outcome after MitraClip: Results from the MITRA-FR trial.

Arch Cardiovasc Dis

November 2022

Chirurgie Cardiovasculaire et Transplantation Cardiaque, Hôpital Cardiovasculaire Louis Pradel, Université Claude-Bernard, Hospices Civils de Lyon, 69677 Bron, France. Electronic address:

Background: Differences in procedural success rates have been proposed to explain the divergent results between the MITRA-FR trial (Percutaneous Repair with the MitraClip Device for Severe Functional/Secondary Mitral Regurgitation) and the COAPT trial (Cardiovascular Outcomes Assessment of the MitraClip Percutaneous Therapy for Heart Failure Patients with Functional Mitral Regurgitation).

Aim: To examine whether MITRA-FR patients who had successful clip implantation achieved a better outcome than the control group.

Methods: Based on the per protocol population of MITRA-FR, we compared the outcome in 71 patients in whom optimal clip implantation was achieved (group 1: mitral regurgitation grade ≤ 1 + at discharge) with that in 23 patients with non-optimal clip implantation (group 2: mitral regurgitation grade ≥ 2 + at discharge) and that in 137 patients in the control group (group 3).

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Mass development of macrophytes is an increasing problem in many aquatic systems worldwide. Dense mats of macrophytes can negatively affect activities like boating, fishing or hydropower production and one of the management measures often applied is mechanical removal. In this study, we analyzed the effect of mechanical macrophyte removal on phytoplankton, zooplankton, and macroinvertebrate (pelagic and benthic samples) assemblages.

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Background: Data regarding characteristics, safety and survival outcomes of patients aged 80 or older treated with immune checkpoint inhibitors (ICI) in routine oncology practice are limited.

Materials And Methods: We retrospectively collected data of patients aged 80 and older with advanced non-small cell lung cancer (NSCLC) or melanoma treated with anti-PD1, anti-PD-L1 or anti-CTLA-4 regardless of the treatment line, in 14 institutions, between January 2014 and June 2017. Progression-free survival (PFS) and overall survival (OS) were estimated with the Kaplan Meier method.

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High proficiency of esophageal endoscopic submucosal dissection with a "tunnel + clip traction" strategy: a large French multicentric study.

Surg Endosc

March 2023

Service Des Maladies de L'Appareil Digestif, CHU Pontchaillou, Université de Rennes 1, 2 rue Henri le Guillou CHU Pontchaillou, 35033 Rennes Cedex, Rennes, France.

Background: Esophageal endoscopic submucosal dissection (ESD) is the gold standard for the treatment of precancerous lesions or superficial esophageal cancers. This procedure is currently performed by expert endoscopists only, and poorly standardized. We aimed to assess the technical results and outcomes of a "tunnel + clip" strategy for esophageal ESD procedures performed by less experienced operators for the treatment of superficial neoplasms.

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Microbiota modulates plant health and appears as a promising lever to develop innovative, sustainable and eco-friendly agro-ecosystems. Key patterns of microbiota assemblages in plants have been revealed by an extensive number of studies based on taxonomic profiling by metabarcoding. However, understanding the functionality of microbiota is still in its infancy and relies on reductionist approaches primarily based on the establishment of representative microbial collections.

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This review describes the design strategies used for the synthesis of various tetracyanobutadiene bridged donor-acceptor molecular architectures by a click type [2+2] cycloaddition-retroelectrocyclization (CA-RE) reaction sequence. The photophysical and electrochemical properties of the tetracyanobutadiene bridged molecular architectures based on various moieties including diketopyrrolopyrrole, isoindigo, benzothiadiazole, pyrene, pyrazabole, truxene, boron dipyrromethene (BODIPY), phenothiazine, triphenylamine, thiazole and bisthiazole are summarized. Further, we discuss some important applications of the tetracyanobutadiene bridged derivatives in dye sensitized solar cells, bulk heterojunction solar cells and photothermal cancer therapy.

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The Enterobacter cloacae complex (ECC) is a group of diverse environmental and clinically relevant bacterial species associated with a variety of infections in humans. ECC have emerged as one of the leading causes of nosocomial infections worldwide. The purpose of this paper is to evaluate the activity of NOSO-502 and colistin (CST) against a panel of ECC clinical isolates, including different Hoffmann's clusters strains, and to investigate the associated resistance mechanisms.

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Wild boar is increasingly establishing populations in the outskirts of European cities, with the largest German urban population occurring in Berlin. Related soil disturbance in grasslands is common and often considered as damage to biodiversity. However, it is unknown how animal and plant species in urban grasslands respond to wild boar activity - an important limitation for conservation management.

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Drug transporters are implicated in the diffusion of tacrolimus into the T lymphocyte in kidney and liver transplant recipients: Genetic, mRNA, protein expression, and functionality.

Drug Metab Pharmacokinet

December 2022

Irset (Institut de Recherche en Santé, Environnement et Travail)-UMR S 1085, EHESP, Inserm, CHU Rennes, Université Rennes 1, F-35000, Rennes, France; INSERM, Centre d'Investigation Clinique 1414, F-35000, Rennes, France; Service de pharmacologie biologique, Centre Hospitalier Universitaire de Rennes, Université de Rennes 1, Rennes, France.

Article Synopsis
  • - The study investigates the need for therapeutic drug monitoring of tacrolimus (TAC) in organ transplant patients due to its narrow therapeutic index and variability in blood concentrations.
  • - The research focuses on the impact of genetic variants and the expression of four drug transporters on TAC concentrations, finding that some transporters correlate with TAC levels in liver and kidney transplant recipients.
  • - In vitro experiments confirmed TAC as a substrate of the drug transporter P-glycoprotein (P-gp), while results for other transporters were inconclusive, enhancing our understanding of TAC transport mechanisms in T lymphocytes.
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Ectophagous folivores do not profit from rich resources on phylogenetically isolated trees.

Oecologia

January 2023

Centre National de la Recherche Scientifique, Université de Rennes 1, Research Unit UMR 6553, Ecosystèmes Biodiversité Evolution (ECOBIO), Campus de Beaulieu, 35042, Rennes, France.

Resource use by consumers across patches is often proportional to the quantity or quality of the resource within these patches. In folivores, such proportional use of resources is likely to be more efficient when plants are spatially proximate, such as trees forming a forest canopy. However, resources provided by forest-trees are often not used proportionally.

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Vegetation of temperate inland salt-marshes reflects local environmental conditions.

Sci Total Environ

January 2023

Department of Geobotany and Landscape Planning, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University in Toruń, Toruń, Poland. Electronic address:

Inland salt marshes are recognized as habitats of unique and valuable vegetation at the European scale. There is still a lack of generalization regarding its vegetation syntaxonomy and environmental requirements, which is needed for its effective protection. To falsify our hypothesis about vegetation dependence on environmental requirements we aimed at description of the syntaxonomical units present in temperate European inland salt marshes and identification of their main environmental drivers.

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Article Synopsis
  • Memory B cells (MBCs) can live a long time, but scientists don't fully understand how they do it.
  • Researchers studied MBCs from people who were vaccinated against smallpox over 40 years ago and found only a few types of these cells stayed alive.
  • The study showed that these long-lived MBCs had unique characteristics and longer telomeres, suggesting that different factors help them survive for so long.
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Plant microbiota dysbiosis and the Anna Karenina Principle.

Trends Plant Sci

January 2023

Université de Rennes 1, CNRS, UMR6553 ECOBIO, Campus Beaulieu, 35042 Rennes, France. Electronic address:

Microorganisms are associated with all plants, recently leading to the hologenome concept. We reviewed the assembly processes of plant microbiota and analyzed its structure during the emergence of dysbioses. In particular, we discussed the Anna Karenina Principle (AKP) based on Leo Tolstoy's assertion applied to plant microbiota: 'All healthy microbiota are alike; each disease-associated microbiota is sick in its own way.

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