5,455 results match your criteria: "N.-B.; Universite de la Saskatchewan Schellenberg[Affiliation]"

Polyproline is a unique thermoresponsive polymer characterized by large thermal and conformational hysteresis. This article employs polyproline-based double hydrophilic block copolymers (PNIPAM--PLP) to gain insight into polyproline's thermoresponsive mechanism. The amine-terminated poly(-isopropylacrylamide) (NH-PNIPAM) was used as the macroinitiator for ring-opening polymerization of proline-NCA monomers, resulting in various block copolymers (PNIPAM--PLP) with varying PLP block lengths.

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Background: Human herpesvirus 6B (HHV-6B) frequently reactivates following allogeneic stem cell transplant (alloHCT). Consensus guidelines note that haploidentical alloHCT may represent a high-risk population for which there is little evidence; this warrants further investigation.

Methods: In this single-center retrospective study, we evaluated 188 consecutive adult patients receiving haploidentical alloHCT between 11/2014 and 11/2020 and compared outcomes between patients with HHV-6B reactivation receiving targeted antiviral therapy and those who were clinically observed.

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Genetic diversity is rapidly lost from small, isolated populations by genetic drift. Measuring the level of genetic drift using effective population size ( ) is highly useful for management. Single-cohort genetic estimators approximate the number of breeders in one season ( ): a value < 100 signals likely inbreeding depression.

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Lymphoscintigraphy With SPECT-CT in Detecting the Site of Chyle Leak in Postoperative Patient.

Clin Nucl Med

December 2024

Department of Surgical Oncology, M.N.B.C.I, Sadhu Vaswani Mission's Medical Complex, Pune, India.

Here is a case of chyle leak post McKeown esophagectomy. Lymphoscintigraphy with 99m Tc-filtered sulfur colloid revealed tracer accumulation along the thoracic duct and in the left hemithorax. Precise localization of leak was done by SPECT-CT imaging.

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Article Synopsis
  • * A review analyzed 99 studies, highlighting that only eight were rigorous randomized controlled trials, with most wearables still in the testing phase.
  • * The uncertainty regarding their effectiveness in heart failure management, coupled with limited evidence, poses challenges for their adoption in clinical practice.
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Reduced auditory perception and brain response with quiet TMS coil.

Brain Stimul

December 2024

Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, USA; Department of Electrical and Computer Engineering, Duke University, USA; Department of Neurosurgery, Duke University School of Medicine, USA; Department of Biomedical Engineering, Duke University, USA. Electronic address:

Background: Electromagnetic forces in transcranial magnetic stimulation (TMS) coils generate a loud clicking sound that produces confounding auditory activation and is potentially hazardous to hearing. To reduce this noise while maintaining stimulation efficiency similar to conventional TMS coils, we previously developed a quiet TMS double containment coil (qTMS-DCC).

Objective: To compare the stimulation strength, perceived loudness, and EEG response between qTMS-DCC and a commercial TMS coil.

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  • A nationwide study in France assessed the effectiveness of fecal microbiota transplantation (FMT) for treating Clostridioides difficile infection (CDI) across 17 centers from 2018 to 2022.
  • The study found an overall FMT success rate of 84.3% with very few severe adverse events, and it identified factors linked to CDI recurrence such as severe chronic kidney disease and inadequate bowel cleansing.
  • Key factors for improving FMT success included proper manufacturing of the transplant, thorough bowel prep, and individualized delivery methods based on patient needs.
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Racial Disparities in Microinvasive Glaucoma Surgery for Management of Primary Open-Angle Glaucoma: A Propensity-Matched Cohort Study.

Am J Ophthalmol

October 2024

Department of Ophthalmology, Mayo Clinic (I.V.W., P.C.L., Y.A., N.B., I.Q., D.D.M., S.D.), Jacksonville, Florida. Electronic address:

Purpose: To evaluate racial and ethnic differences in the use of microinvasive glaucoma surgery (MIGS) for the management of mild-moderate primary open-angle glaucoma (POAG) in the United States.

Design: Retrospective cohort study.

Participants: Patients with a diagnosis of mild or moderate POAG, as defined by Current Procedural Terminology (CPT) codes, were included.

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End-of-Life Health Care Service Use and Cost Among Medicare Decedents With Neurodegenerative Diseases.

Neurology

November 2024

From the Department of Neurology (W.W.A., N.D., H.E., A.L.C.S., A.W.W.), Translational Center of Excellence for Neuroepidemiology and Neurology Outcomes Research (W.W.A., N.D., A.L.C.S., A.W.W.), Perelman School of Medicine, Department of Medical Ethics and Health Policy (C.S., N.B.C.), Leonard Davis Institute of Health Economics (N.D., A.L.C.S., N.B.C., A.W.W.), and Department of Biostatistics, Epidemiology, and Informatics (A.L.C.S., J.T.F., A.W.W.), Perelman School of Medicine, University of Pennsylvania, Philadelphia.

Article Synopsis
  • The study investigates healthcare utilization and costs during the end-of-life period for Medicare beneficiaries with neurodegenerative diseases (like Alzheimer’s, Parkinson’s, and ALS) compared to those with cancer, specifically malignant brain tumors and pancreatic cancer.
  • Researchers analyzed 2018 data, looking at demographics, clinical characteristics, and healthcare service usage over the final year of life, focusing particularly on emergency department visits, hospitalizations, and hospice care.
  • Results showed that individuals with neurodegenerative diseases were generally older and more reliant on Medicaid, had higher odds of emergency department use but lower hospitalization rates compared to cancer patients, with overall healthcare costs primarily driven by inpatient care.
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Therapeutic development for skeletal muscle diseases is challenged by a lack of ex vivo models that recapitulate human muscle physiology. Here, we engineered 3D human skeletal muscle tissue in the Biowire II platform that could be maintained and electrically stimulated long-term. Increasing differentiation time enhanced myotube formation, modulated myogenic gene expression, and increased twitch and tetanic forces.

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Scanner-specific optimisation of automated lesion segmentation in MS.

Neuroimage Clin

November 2024

MS Center Amsterdam, Radiology and Nuclear Medicine, Vrije Universiteit Amsterdam, Amsterdam Neuroscience, Amsterdam UMC Location VUmc, Amsterdam, The Netherlands.

Article Synopsis
  • - This study aimed to evaluate how reliable automatic lesion segmentation tools are when used on MRI scans of people with multiple sclerosis (pwMS) across different scanners, focusing on their repeatability and accuracy compared to manual segmentation methods.
  • - Researchers scanned 30 pwMS using three different MRI machines (two 3.0 T and one 1.5 T) and employed various segmentation techniques, including both automated tools and manual methods, to measure their effectiveness.
  • - Results showed that optimizing the segmentation settings for each specific scanner significantly improved accuracy (measured by the Dice similarity coefficient) for one of the software tools (LST) compared to using default settings or a combined approach.
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The quality of emergency department (ED) care for children in the US is highly variable. The National Pediatric Readiness Project aims to improve survival for children receiving emergency services. We conducted a cost-effectiveness analysis of increasing ED pediatric readiness, using a decision-analytic simulation model.

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Article Synopsis
  • Predictive coding helps the brain make guesses about what we will hear or sense next, which involves different brain waves working together.
  • When monkeys were put to sleep with a drug, their brains stopped using these guessing signals, which changed how they reacted to unexpected sounds.
  • This study shows that being aware of things (consciousness) is linked to how well the brain predicts and processes information, and when we’re unconscious, those predictions don’t work like they should.
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Outer Retinal Thinning is Associated With Brain Atrophy in Early Age-Related Macular Degeneration.

Am J Ophthalmol

January 2025

From the Department of Ophthalmology (Y.J., N.G., M.B., J.P.O., and C.S.L.), University of Washington, Seattle, Washington, USA; The Roger and Angie Karalis Johnson Retina Center (C.S.L.), Seattle, Washington, USA. Electronic address:

Article Synopsis
  • The study explores the link between retinal changes from age-related macular degeneration (AMD) and brain structure in older adults, specifically focusing on those aged 70 and above.
  • Participants underwent a series of tests, including cognitive assessments and brain imaging, to analyze the correlation between retinal thickness and brain morphology.
  • Results indicated that thinner outer retinal layers are associated with reduced size and thickness in critical brain areas, suggesting that AMD may have implications for cognitive health and brain aging.
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Article Synopsis
  • The mean upper cervical cord area (MUCCA) is a key biomarker for neurodegeneration, but high-resolution imaging of the cervical spinal cord is not commonly used in clinical practice due to limitations with current imaging techniques.
  • A new approach utilizing the zero-shot super-resolution technique SMORE, previously validated in brain imaging, is proposed to enhance cervical spinal cord images obtained in standard 2D formats.
  • Test results indicate that super-resolved images provide a more accurate representation of the upper cord area compared to low-resolution scans, showing excellent correlation with high-resolution scans and highlighting their effectiveness in tracking neurodegeneration over time.
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  • Researchers developed a microbiome-based diagnostic test for inflammatory bowel disease (IBD) by analyzing 5,979 fecal samples, identifying significant bacterial alterations related to IBD.* ! * The study created diagnostic models using ten bacterial species for ulcerative colitis and nine for Crohn's disease, achieving high accuracy (areas under the curve >0.90) in distinguishing IBD from healthy controls.* ! * A new multiplex droplet digital PCR test was also developed, which outperformed the standard fecal calprotectin test, indicating the potential for a noninvasive multibacteria biomarker panel in IBD diagnosis.* !
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Article Synopsis
  • * Using ribosome footprint profiling (Ribo-seq), researchers discovered new open reading frames (ORFs) and many short ORFs (sORFs) that may code for microproteins, which could impact the quality of antibody products.
  • * Analyzing eight commercial antibody products showed that microprotein impurities exist and their levels fluctuate depending on the growth phase and culture environment, highlighting the need for better resources to study translation regulation in CHO cells.
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Alcohol and Hepatocellular Carcinoma.

Clin Liver Dis

November 2024

Hepatology, Liver Transplant, Division of Gastroenterology and Hepatology, Department of Medicine, University of California, San Francisco, 505 Parnassus Avenue, S-357, San Francisco, CA 94112, USA. Electronic address:

Alcohol-associated liver disease (ALD) poses a significant risk for hepatocellular carcinoma (HCC), comprising various liver conditions from steatosis to cirrhosis. Despite accounting for a third of global HCC cases and deaths, ALD-related HCC lacks characterization compared to viral hepatitis-related HCC. Proposed mechanisms for ALD-related HCC include acetaldehyde toxicity, increased reactive oxygen species, and inflammation.

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Type I interferons contribute to the pathogenesis of several autoimmune disorders, including systemic lupus erythematosus (SLE), systemic sclerosis, cutaneous lupus erythematosus, and myositis. Anifrolumab is a monoclonal antibody that binds to subunit 1 of the type I interferon receptor (IFNAR1). Results of phase IIb and phase III trials led to the approval of intravenous anifrolumab 300 mg every 4 weeks (Q4W) alongside standard therapy in patients with moderate-to-severe SLE.

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Brook Trout () populations have experienced marked declines throughout their native range and are presently threatened due to isolation in small habitat fragments, land use changes, and climate change. The existence of numerous, spatially distinct populations poses substantial challenges for monitoring population status (e.g.

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Next Generation Sequencing: Latent applications in clinical diagnostics with the advent of bioinformatic frameworks.

Pathol Res Pract

November 2024

Department of Biotechnology, School of Basic and Applied Sciences, Shri Guru Ram Rai University, Patel Nagar, Dehradun, Uttarakhand 248001, India. Electronic address:

For the past 3-4 decades, the discovery of Sanger's method of pyrosequencing was the only method unparalleled till 2005 being employed as a method of whole genome sequencing (WGS). Following this, a revolutionary extensive parallel sequencing method, Next Generation Sequencing (NGS), was engineered. NGS supported a substantial number of bases under a high throughput metagenomic interrogation.

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Large Language Models for Simplified Interventional Radiology Reports: A Comparative Analysis.

Acad Radiol

September 2024

Department of Radiology, Klinikum rechts der Isar, Technical University of Munich (TUM), Munich, Germany (F.B., A.K., M.R.M., K.K.B., L.C.A.).

Purpose: To quantitatively and qualitatively evaluate and compare the performance of leading large language models (LLMs), including proprietary models (GPT-4, GPT-3.5 Turbo, Claude-3-Opus, and Gemini Ultra) and open-source models (Mistral-7b and Mistral-8×7b), in simplifying 109 interventional radiology reports.

Methods: Qualitative performance was assessed using a five-point Likert scale for accuracy, completeness, clarity, clinical relevance, naturalness, and error rates, including trust-breaking and post-therapy misconduct errors.

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Implications of the 2024 Election Outcome for U.S. Health Policy.

N Engl J Med

October 2024

From the Harvard T.H. Chan School of Public Health, Boston (R.J.B., J.M.B.), and the Harvard Kennedy School, Cambridge, MA (N.B.L.).

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