4,255 results match your criteria: "S10 2TN; Sheffield Teaching Hospitals NHS Foundation Trust[Affiliation]"

Capturing non-Markovian polaron dressing with the master equation formalism.

J Chem Phys

October 2024

Department of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom.

Understanding the dynamics of open quantum systems in strong coupling and non-Markovian regimes remains a formidable theoretical challenge. One popular and well-established method of approximation in these circumstances is provided by the polaron master equation (PME). In this work, we re-evaluate and extend the validity of the PME to capture the impact of non-Markovian polaron dressing, induced by non-equilibrium open system dynamics.

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Glycoprofile Comparison of the SARS-CoV-2 Spike Proteins Expressed in CHO and HEK Cell Lines.

Mol Biotechnol

October 2024

School of Chemical, Materials and Biological Engineering, University of Sheffield, Mappin St., Sheffield, S1 3JD, UK.

Article Synopsis
  • - The study examines the N-glycosylation profiles of the SARS-CoV-2 spike protein produced in Human Embryonic Kidney (HEK) and Chinese Hamster Ovary (CHO-S) cell lines, which are crucial for developing diagnostic and therapeutic tools against viral variants.
  • - Analysis using tandem mass spectrometry revealed significant differences in the types and variety of N-glycans produced by each cell line, with CHO-S showing increased terminal sialylation and unique immunogenic components.
  • - The findings emphasize the importance of understanding glycosylation variations in antibody and vaccine development, ultimately contributing to more effective responses to emerging COVID-19 variants.
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Bigger genomes provide environment-dependent growth benefits in grasses.

New Phytol

December 2024

Department of Trait Diversity and Function, Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AE, UK.

Article Synopsis
  • Scientists studied why some grass plants have bigger genomes than others and how that affects their growth!
  • They found that having a larger genome might help grasses grow better in certain conditions, especially when there is lots of nitrogen in the soil!
  • The research also showed that things like a grass's life cycle and how it makes food (photosynthesis) play a big role in whether it has a small or large genome!
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Terrestrial enhanced rock weathering (ERW) is the application of pulverized silicate rock to soils for the purposes of carbon removal and improved soil health. Although a geochemical modeling framework for ERW in soils is emerging, there is a scarcity of experimental and field trial data exploring potential environmental impacts, risks, and monitoring strategies associated with this practice. This paper identifies potential negative consequences and positive cobenefits of ERW scale-up and suggests mitigation and monitoring strategies.

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Phosphorus availability influences disease-suppressive soil microbiome through plant-microbe interactions.

Microbiome

September 2024

Ecology and Biodiversity Group, Department of Biology, Institute of Environmental Biology, Utrecht University, Padualaan 8, Utrecht, 3584 CH, the Netherlands.

Background: Soil nutrient status and soil-borne diseases are pivotal factors impacting modern intensive agricultural production. The interplay among plants, soil microbiome, and nutrient regimes in agroecosystems is essential for developing effective disease management. However, the influence of nutrient availability on soil-borne disease suppression and associated plant-microbe interactions remains to be fully explored.

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Nitric oxide induces the distinct invisibility phenotype of Mycobacterium tuberculosis.

Commun Biol

September 2024

Leicester Tuberculosis Research Group, Department of Respiratory Sciences, University of Leicester, Leicester, LE1 9HN, UK.

During infection Mycobacterium tuberculosis (Mtb) forms physiologically distinct subpopulations that are recalcitrant to treatment and undetectable using standard diagnostics. These difficult to culture or differentially culturable (DC) Mtb are revealed in liquid media, their revival is often stimulated by resuscitation-promoting factors (Rpf) and prevented by Rpf inhibitors. Here, we investigated the role of nitric oxide (NO) in promoting the DC phenotype.

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Background/objectives: Dendrimer-based astodrimer sodium nasal spray was assessed for its ability to reduce SARS-CoV-2 load in outpatients with COVID-19, which remains a severe illness for vulnerable groups.

Methods: This was a randomised, double-blind, placebo-controlled clinical investigation evaluating the efficacy of astodrimer nasal spray in reducing SARS-CoV-2 viral burden in the nasopharynx of outpatients with COVID-19. Non-hospitalised adults with SARS-CoV-2 infection were randomised 1:1 to astodrimer or placebo four times daily from Day 1 to Day 7.

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Raman spectroscopy of muscle provides a molecular fingerprint to identify the disease. Previous work has demonstrated effectiveness in differentiating between two groups of equal sizes (e.g.

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Background: Precise and unequivocal specification of intervention content is key to facilitating the accumulation and implementation of knowledge. The Behaviour Change Technique Taxonomy v1 (BCTTv1) is the most widely used classification of behaviour change techniques (BCTs), providing a shared, standardized vocabulary to identify the active ingredients of behavioural interventions. However, the BCTTv1 is only available in English and this hampers its broad use and adoption.

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Asymmetric cell division in Saccharomyces cerevisiae involves class V myosin-dependent transport of organelles along the polarised actin cytoskeleton to the emerging bud. Vac17 is the vacuole/lysosome-specific myosin receptor. Its timely breakdown terminates transport and results in the proper positioning of vacuoles in the bud.

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Article Synopsis
  • SMC complexes, like condensin and cohesin, help organize DNA by extruding loops, but the rules controlling this process are not fully understood.
  • Research using single-molecule analysis and simulations shows that monomeric complexes extrude DNA from one side, while dimeric complexes (e.g., Smc5/6 and Wadjet) do so from both sides depending on DNA tension.
  • The study reveals that DNA tension and thermal fluctuations influence how these complexes operate, leading to variations in looping behavior and debunking the idea that extrusion symmetry is fixed.
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Fat and Dachsous are evolutionarily conserved atypical cadherins that regulate polarized cell behaviors. In the Drosophila wing, they interact heterophilically between neighboring cells, localize asymmetrically to opposite cell ends, and control wing shape by regulating oriented cell rearrangements and divisions. Fat and Dachsous have 34 and 27 cadherin repeats, respectively, and previous work has identified trans interactions between their first four cadherin repeats.

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How Well Do Popular Bicycle Helmets Protect from Different Types of Head Injury?

Ann Biomed Eng

December 2024

HEAD Lab, Dyson School of Design Engineering, Imperial College London, London, SW7 2AZ, UK.

Article Synopsis
  • Bicycle helmets primarily protect against skull fractures but their effectiveness against diffuse brain injuries is less understood.
  • The study tested 30 popular helmets under various impact conditions to evaluate protection against linear and rotational forces, revealing significant variations in performance.
  • Helmets with MIPS technology generally performed better in reducing rotational forces, but price did not correlate with injury risk, indicating that not all expensive helmets offer better protection.
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Premise: Seed dispersal is a critical process impacting individual plants and their communities. Plants have evolved numerous strategies and structures to disperse their seeds, but the evolutionary drivers of this diversity remain poorly understood in most lineages. We tested the hypothesis that the evolution of wind dispersal traits within the melicgrasses (Poaceae: Meliceae Link ex Endl.

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Global genomic diversity of Pseudomonas aeruginosa in bronchiectasis.

J Infect

November 2024

Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, L69 3BX, UK.

Objectives: Pseudomonas aeruginosa is the most common pathogen in the bronchiectasis lung, associated with worsened outcomes. P. aeruginosa genomic studies in this context have been limited to single-country, European studies.

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Magnesium phosphate cements (MPCs), also known as chemically bonded ceramics, represent a class of inorganic cements that have garnered considerable interest in recent years for their exceptional properties and diverse applications in the construction and engineering sectors. However, the development of these cements is relatively recent (they emerged at the beginning of the 20th century), so there are still certain aspects relating to their durability that need to be evaluated. The present work analyses the chemical durability of magnesium potassium phosphate cements (MKPCs) during 1 year of immersion in three leaching media: seawater, a NaSO solution (4% by mass) and deionized water.

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Prostate cancer is a lethal solid malignancy and a leading cause of cancer-related deaths in males worldwide. Treatments, including radical prostatectomy, radiotherapy, and hormone therapy, are available and have improved patient survival; however, recurrence remains a huge clinical challenge. Enzalutamide is a second-generation androgen receptor antagonist that is used to treat castrate-resistant prostate cancer.

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Increasing hexokinase 1 expression improves mitochondrial and glycolytic functional deficits seen in sporadic Alzheimer's disease astrocytes.

Mol Psychiatry

September 2024

Sheffield Institute for Translational Neuroscience, School of Medicine and Population Health, University of Sheffield, 385a Glossop Rd, Sheffield, S10 2HQ, UK.

Abnormalities in cellular metabolism are seen early in Alzheimer's disease (AD). Astrocyte support for neuronal function has a high metabolic demand, and astrocyte glucose metabolism plays a key role in encoding memory. This indicates that astrocyte metabolic dysfunction might be an early event in the development of AD.

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Background: Neutrophils are essential in the early innate immune response to pathogens. Harnessing their antimicrobial powers, without driving excessive and damaging inflammatory responses, represents an attractive therapeutic possibility. The neutrophil population is increasingly recognised to be more diverse and malleable than was previously appreciated.

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Mitochondrial DNA has been a popular marker in phylogeography, phylogeny, and molecular ecology, but its complex evolution is increasingly recognized. Here, we investigated mitochondrial DNA variation in Anopheles gambiae and Anopheles coluzzii, in relation to other species in the Anopheles gambiae complex, by assembling the mitogenomes of 1,219 mosquitoes across Africa. The mitochondrial DNA phylogeny of the Anopheles gambiae complex was consistent with previously reported highly reticulated evolutionary history, revealing important discordances with the species tree.

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Article Synopsis
  • Foodborne diseases cost the UK economy £9 billion each year, largely due to unsafe food practices at home, especially among adults over 60 who are more vulnerable.
  • Previous studies have treated older adults as one group, but this research aims to identify specific risky food behaviours like cooking, cleaning, and adhering to expiration dates.
  • The study uses data from the Food and You 2 survey and finds that different risky behaviours are influenced by various factors, indicating that tailored strategies are needed for effective intervention.
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A major barrier to sustainably improving food security for a growing global population is the availability of suitable space for growing crops. Urban areas offer a potential solution to increase availability of land, however, horticultural soils often accumulate zinc. These increased levels may affect the interactions between crops and soil microbes with potential implications for crop health and nutrition.

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Removal of ribonucleotides from DNA by RNaseH2 is essential for genome stability, and its impacted function causes the neurodegenerative disease, Aicardi Goutières Syndrome. We have created a zebrafish rnaseh2a mutant to model this process. Surprisingly, RNaseH2a knockouts show little phenotypic abnormality at adulthood in the first generation, unlike mouse knockout models, which are early embryonic lethal.

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Pharmacological inhibition of ENT1 enhances the impact of specific dietary fats on energy metabolism gene expression.

Proc Natl Acad Sci U S A

September 2024

Centre for Biomedical Sciences, Department of Biological Sciences, School of Life Sciences and the Environment, Royal Holloway University of London, Egham TW20 OEX, United Kingdom.

Medium chain fatty acids are commonly consumed as part of diets for endurance sports and as medical treatment in ketogenic diets where these diets regulate energy metabolism and increase adenosine levels. However, the role of the equilibrative nucleoside transporter 1 (ENT1), which is responsible for adenosine transport across membranes in this process, is not well understood. Here, we investigate ENT1 activity in controlling the effects of two dietary medium chain fatty acids (decanoic and octanoic acid), employing the tractable model system We show that genetic ablation of three ENT1 orthologues unexpectedly improves cell proliferation specifically following decanoic acid treatment.

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Age-stratified path analyses modeled associations between enteric pathogen reservoirs, transmission pathways and height-for-age z-scores (HAZ) to identify determinants of childhood growth in the Kolkata, India site of the Global Enteric Multicenter Study (GEMS). Models tested direct associations of potential pathogen reservoirs with HAZ at 60-day follow-up in separate moderate and severe diarrhea (MSD) case and control cohorts or indirectly when mediated by enteric infections. In the MSD cohort, rotavirus and typical EPEC (tEPEC) infections among children 0-11 months of age and ST-ETEC infections among children 12-23 months of age were associated with lower HAZ.

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