558 results match your criteria: "University of London London.[Affiliation]"

To date, studies of the impacts of climate warming on individuals and populations have mostly focused on mortality and thermal tolerance. In contrast, much less is known about the consequences of sublethal effects, which are more challenging to detect, particularly in wild species with cryptic life histories. This necessitates the development of molecular tools to identify their signatures.

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Feeding ecology is an essential component of an organism's life, but foraging comes with risks and energetic costs. Species in which populations exhibit more than one feeding strategy, such as sea turtles, are good systems for investigating how feeding ecology impacts life-history traits, reproduction and carried over effects across generations. Here, we investigated how the feeding ecology of loggerhead sea turtles () nesting at the Cabo Verde archipelago correlates with reproductive outputs and offspring quality.

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Background: Short and rare episodes of atrial fibrillation (AF) are commonly detected using implanted devices (device-detected AF) in patients with prior stroke or transient ischemic attack (TIA). The effectiveness and safety of oral anticoagulation in patients with prior stroke or TIA and device-detected AF but with no ECG-documented AF is unclear.

Methods And Results: This prespecified analysis of the NOAH-AFNET 6 (Non-Vitamin K Antagonist Oral Anticoagulants in Patients With Atrial High Rate Episodes) trial with post hoc elements assessed the effect of oral anticoagulation in patients with device-detected AF with and without a prior stroke or TIA in the randomized, double-blind, double-dummy NOAH-AFNET 6 trial.

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Boron nitride is extensively used in various biomedical applications and often interacting with the blood circulatory system. However, the effect of its biotransformation in blood plasma, drug delivery applications, and antitumor effects remains unclear. Herein, we synthesized hydroxylated BN nanoplatelets (-OH/BNNPs) that are used to load doxorubicin (DOX) for cancer therapy.

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Immunoglobulin class-switch recombination: Mechanism, regulation, and related diseases.

MedComm (2020)

August 2024

Department of Pathogen Biology School of Basic Medicine, Tongji Medical College and State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Huazhong University of Science and Technology Wuhan Hubei China.

Maturation of the secondary antibody repertoire requires class-switch recombination (CSR), which switches IgM to other immunoglobulins (Igs), and somatic hypermutation, which promotes the production of high-affinity antibodies. Following immune response or infection within the body, activation of T cell-dependent and T cell-independent antigens triggers the activation of activation-induced cytidine deaminase, initiating the CSR process. CSR has the capacity to modify the functional properties of antibodies, thereby contributing to the adaptive immune response in the organism.

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Article Synopsis
  • Pityriasis rubra pilaris (PRP) is a rare skin disease that looks a lot like psoriasis and affects the skin on the palms and soles.
  • Some recent treatments using special medicines called monoclonal antibodies have shown good results for people with PRP.
  • One case of an adult diagnosed with an unusual type of PRP showed major improvement after receiving a specific treatment and emphasized the importance of genetic testing in figuring out tricky skin diseases.
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Among extant species, the ability to sample the extremes of body size-one of the most useful predictors of an individual's ecology-is highly unlikely. This improbability is further exaggerated when sampling the already incomplete fossil record. We quantify the likelihood of sampling the uppermost limits of body size in the fossil record using Osborn, 1905 as a model, selected for its comparatively well-understood life history parameters.

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  • The study investigates sex-specific factors that lead to advanced-stage diagnosis in bladder and renal cancer patients, using data from over 1,500 cases in England between 2012 and 2015.
  • Female patients and those presenting with urinary tract infections or abdominal symptoms showed significantly higher odds of being diagnosed with advanced-stage bladder cancer compared to their male counterparts.
  • The findings suggest that non-haematuria symptoms indicate a higher risk for advanced bladder cancer, highlighting the need for targeted interventions for women to address sex-related disparities in cancer outcomes.
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BiFeO thin films have been widely studied for photoelectrochemical water splitting applications because of its narrow bandgap and good ferroelectricity which can promote the separation of photo-generated charges. Bismuth is well known as a volatile element and excess bismuth is usually added into the precursor to compensate the loss of bismuth during heat treatment, but the amount of excess bismuth required and how excess bismuth will affect PEC performance have not been clearly studied. Herein, self-doped Bi FeO thin films are prepared simple chemical solution deposition method with excess bismuth from 0-30% in the precursor.

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Introduction: Person-centered goals capture individual priorities in personal contexts. Goal Attainment Scaling (GAS) has been used in drug trials involving people living with dementia (PLWD) but GAS has been characterized as difficult to incorporate into trials and clinical practice. We used GAS in a trial of New Interventions for Independence in Dementia Study (NIDUS)-family, a manualized care and support intervention, as the primary outcome and to tailor the interventions to goals set.

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Duplicated genes provide the opportunity for evolutionary novelty and adaptive divergence. In many cases, having more gene copies increases gene expression, which might facilitate adaptation to stressful or novel environments. Conversely, overexpression or misexpression of duplicated genes can be detrimental and subject to negative selection.

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Background: Atopic eczema is a common, chronic, inflammatory skin condition with considerable heterogeneity. South Asian people living in the UK frequently have low serum vitamin D3 (25(OH)D), and those with atopic disease can present with severe eczema. The association between vitamin D deficiency and eczema severity, and the role of vitamin D supplementation in atopic eczema is inconsistent, and under-researched in people with Asian ancestry.

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Actinic keratoses (AKs) are common pre-malignant lesions. There are numerous management options including active surveillance, multiple topical therapies, cryotherapy, curettage and cautery, and photodynamic therapy, each with their own risks, benefits and efficacy. Best practice currently involves shared decision-making between patient and clinician, particularly in the setting of multiple management options.

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  • The left atrial appendage (LAA) is a major source of blood clots in patients with nonvalvular atrial fibrillation (NVAF), with LAA pseudothrombus (LAAPT) occurring in about 28% of patients.
  • A study of 213 NVAF patients showed that LAAPT was linked to larger LAA size and lower tortuosity, and it was significantly associated with a higher risk of stroke.
  • LAAPT's presence on cardiovascular CT scans could provide additional information for assessing stroke risk beyond the CHADS-VASc scoring system.
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Ongoing climatic shifts and increasing anthropogenic pressures demand an efficient delineation of conservation units and accurate predictions of populations' resilience and adaptive potential. Molecular tools involving DNA sequencing are nowadays routinely used for these purposes. Yet, most of the existing tools focusing on sequence-level information have shortcomings in detecting signals of short-term ecological relevance.

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Computational models of cardiac electrophysiology have gradually matured during the past few decades and are now being personalised to provide patient-specific therapy guidance for improving suboptimal treatment outcomes. The predictive features of these personalised electrophysiology models hold the promise of providing optimal treatment planning, which is currently limited in the clinic owing to reliance on a population-based or average patient approach. The generation of a personalised electrophysiology model entails a sequence of steps for which a range of activation mapping, calibration methods and therapy simulation pipelines have been suggested.

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Background: Studies reporting on the incidence of sudden cardiac arrest and/or death (SCA/D) in athletes commonly lack methodological and reporting rigor, which has implications for screening and preventative policy in sport. To date, there are no tools designed for assessing study quality in studies investigating the incidence of SCA/D in athletes.

Methods And Results: The International Criteria for Reporting Study Quality for Sudden Cardiac Arrest/Death tool (IQ-SCA/D) was developed following a Delphi process.

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The luminal environment is rich in macronutrients coming from our diet and resident microbial populations including their metabolites. Together, they have the capacity to modulate unique cell surface receptors, known as G-protein coupled receptors (GPCRs). Along the entire length of the gut epithelium, enteroendocrine cells express GPCRs to interact with luminal contents, such as GPR93 and the calcium sensing receptor to sense proteins, FFA2 and GPR84 to sense fatty acids, and SGLT1 and T1R to sense carbohydrates.

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  • Immunodeficient mouse models are commonly used to study human stem cells, but issues with reproducibility and variation in engraftment remain unresolved.
  • This research investigates how the sex of both human donor cells and recipient mice affects the engraftment of healthy and leukemic cells, discovering significant differences based on their genders.
  • Notably, human female donor cells show increased engraftment and sensitivity to the gender of recipient mice, highlighting the need to consider donor-recipient characteristics in future pre-clinical studies.
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Spatial agent-based models are frequently used to investigate the evolution of solid tumours subject to localized cell-cell interactions and microenvironmental heterogeneity. As spatial genomic, transcriptomic and proteomic technologies gain traction, spatial computational models are predicted to become ever more necessary for making sense of complex clinical and experimental data sets, for predicting clinical outcomes, and for optimizing treatment strategies. Here we present a non-technical step by step guide to developing such a model from first principles.

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Linking anatomical and histological traits of the digestive tract to resource consumption and assimilation of omnivorous tetra fishes.

Ecol Evol

May 2024

Programa de Pós-Graduação em Biologia Animal, Departamento de Zoologia, Instituto de Biociências Universidade Federal do Rio Grande do Sul Porto Alegre RS Brazil.

This study explores the interplay between digestive tract traits, food intake, and assimilation in omnivorous tetra fishes (, aff. , and ) from the Iguaçu River basin, an ecologically significant region known for high endemism. We hypothesize that variations in digestive tracts across species would be associated with differences in diet, isotopic composition in fish tissues, and overall diet assimilation.

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Low-Dose Colchicine Ameliorates Doxorubicin Cardiotoxicity Via Promoting Autolysosome Degradation.

J Am Heart Assoc

May 2024

Centre for Cardiovascular Diseases, Henan Key Laboratory of Hereditary Cardiovascular Diseases The First Affiliated Hospital of Zhengzhou University, Zhengzhou University Zhengzhou China.

Background: The only clinically approved drug that reduces doxorubicin cardiotoxicity is dexrazoxane, but its application is limited due to the risk of secondary malignancies. So, exploring alternative effective molecules to attenuate its cardiotoxicity is crucial. Colchicine is a safe and well-tolerated drug that helps reduce the production of reactive oxygen species.

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