Publications by authors named "Simons J"

In this work, we developed PolyMap (polyclonal mapping), a high-throughput method for mapping protein-protein interactions. We demonstrated the mapping of thousands of antigen-antibody interactions between diverse antibody libraries isolated from convalescent and vaccinated COVID-19 donors and a set of clinically relevant SARS-CoV-2 spike variants. We identified over 150 antibodies with a variety of distinctive binding patterns toward the antigen variants and found a broader binding profile, including targeting of the Omicron variant, in the antibody repertoires of more recent donors.

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Background: Proteomics is routinely used to type clinical amyloid deposits, and offers additional benefit of identifying genetic variants, which can be diagnostically useful. Reviewing the proteomics data for ATTR patients attending our Centre revealed an unusually large number of samples containing a rare pathogenic H90D TTR variant alongside the more common H90N variant.

Methods: These findings raised questions to their source.

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Introduction: Current protocols for delivering percussive therapy (PT) using massage guns are heterogeneous creating a need to establish the impact of study design on physiological measures. This cross-over design study aimed to determine the most effective protocol, among the eight protocols examined, on lower body flexibility, and to support the provision of protocol validation for future research.

Method: Recreationally active healthy adults (n = 35) undertook two main protocols; three sessions per week at 2100 rpm or increasing the speed from session-to-session: 1750 to 2100-2400 rpm.

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The hidden Markov model is a popular modeling strategy for describing and explaining latent process dynamics. There is a lack of information on the estimation performance of the Bayesian hidden Markov model when applied to categorical, one-level data. We conducted a simulation study to assess the effect of the 1) number of observations (250-8.

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This study examined associations of compliance rate with the reliability and convergent validity of intoxication and negative affect assessments in experience sampling method (ESM) data in three samples (Veterans, Sexual Minority Men, and College Students). Convergent validity was operationalized as within-person associations between daily aggregates of random in situ assessments and retrospective daily assessments or transdermal alcohol assessments. Measures with lower ICC require more assessments for a reliable aggregate (e.

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  • This study investigated factors linked to positive sentinel lymph nodes (SLNs) in cT1-2N0 breast cancer patients who received neoadjuvant chemotherapy (NACT) and how this data might differ from patients who didn't receive NACT.
  • Out of 1,930 patients studied, 12.1% had positive SLNs, with specific tumor characteristics (like hormone receptor-positive status and lobular histology) significantly predicting this outcome.
  • The findings suggested low axillary recurrence rates in patients with positive SLNs, indicating that certain tumor features and older age could help identify individuals at higher risk for further disease after treatment.
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  • In 2019, the FDA warned that devices coated with paclitaxel for treating claudication might be linked to higher mortality rates over five years, prompting a study to explore patient preferences between risks of revascularization and mortality.
  • A survey involving 272 patients from seven medical centers used discrete-choice experiments to assess how much increased mortality risk they would accept in exchange for decreased chances of needing further procedures on their blood vessels.
  • Results indicated that patients would generally tolerate a small increase in 5-year mortality risk (up to 12.6%) to achieve significant reductions in treatment risks, though there was notable variability in individual risk tolerance, highlighting the need for tailored decision-making support.
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Background: Axillary disease extent according to baseline [18F]fluorodeoxyglucose PET/CT combined with pathological axillary treatment response has been proposed to guide de-escalation of axillary treatment for clinically node-positive breast cancer patients treated with neoadjuvant systemic therapy. The aim of this study was to assess whether axillary disease extent according to baseline [18F]fluorodeoxyglucose PET/CT and breast cancer molecular subtype are predictors of axillary pCR.

Methods: This study included clinically node-positive patients treated with neoadjuvant systemic therapy in the prospective Radioactive Iodine Seed placement in the Axilla with Sentinel lymph node biopsy ('RISAS') trial (NCT02800317) with baseline [18F]fluorodeoxyglucose PET/CT imaging available.

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In recent years, many researchers have become interested in chemical reactions, photon-induced processes, and other events taking place at or near aqueous liquid/vapor or ice/vapor interfaces. Such studies relate to a wide variety of atmospheric, oceanographic, and environmental issues. Near these interfaces, atomic and molecular anions and cations display quite different behaviors than when they are fully solvated in the bulk medium.

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  • CO is a crucial intermediary for converting CO into products with carbon-carbon bonds using copper (Cu) as a catalyst.
  • A study assessed how the size of CuO precursor particles affects the electroreduction efficiency, revealing that medium-sized CuO (10-20 nm) produced the highest selectivity for carbon products (Faradaic efficiency of 60%).
  • Differences in product distribution were tied to the density of surface defects on the Cu particles, with smaller CuO precursors (<10 nm) leading to higher hydrogen production due to more under-coordinated defects.
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Despite advances in prevention and treatment, the transmission of human immunodeficiency virus remains a significant problem in the United States, especially among men who have sex with men (MSM). Alcohol use can promote risky sexual decisions, and alcohol expectancies may influence the role of alcohol in decision making. The present secondary analysis tests the moderating role of sexual alcohol expectancies (SAEs) in the relation between daily alcohol intoxication and sexual behavior in a sample of 248 moderate- to heavy-drinking MSM.

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Background: Surgical aortic valve replacement (SAVR) is an established therapy for severe calcific aortic stenosis. Enhanced recovery after cardiac surgery (ERACS) protocols have been shown to improve outcomes for elective cardiac procedures. The COVID-19 pandemic prompted early extubation post-elective surgeries to preserve critical care resources.

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Direct air capture (DAC) in combination with storage of CO can lower atmospheric CO concentrations. This study investigates the environmental impact of a new fast-swing solid sorbent DAC system, including CO transport and storage, over its life cycle, using prospective life cycle assessment. This DAC technology is currently on technology readiness level 5 and is expected to operate on an industrial scale by 2030.

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Veno-venous extracorporeal membrane oxygenation (VV-ECMO) is a critical intervention for patients with severe lung failure, especially acute respiratory distress syndrome (ARDS). The weaning process from ECMO relies largely on expert opinion due to a lack of evidence-based guidelines. The ventilatory ratio (VR), which correlates with dead space and mortality in ARDS, is calculated as [minute ventilation (mL/min) x arterial pCO (mmHg)]/[predicted body weight × 100 × 37.

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The neonatal Fc receptor (FcRn) is the receptor responsible for bidirectional transport of immunoglobulin G (IgG) across cells, maintenance of IgG levels in serum, and assisting with antigen presentation. Unfortunately, little is known about FcRn in horses. Therefore, the objective of this study was to provide fundamental information regarding the location of FcRn in equine tissues.

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Otolaryngology residency training, along with the world of online medical education, has been continuously evolving and refining methods to educate and produce competent otolaryngologists. Numerous resources have been developed to assist otolaryngology residents in enhancing their clinical training. Although these resources greatly enhance clinical training, the growing volume of material presents a challenge within the constrained schedule of otolaryngology residents.

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Objective: Antiplatelet and/or anticoagulant therapy are commonly prescribed after fenestrated/branched endovascular aortic repair (F/BEVAR). However, the optimal regimen remains unknown. We sought to characterize practice patterns and outcomes of antiplatelet and anticoagulant use in patients who underwent F/BEVAR.

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Certain organoid subtypes are particularly sensitive. We explore whether moral intuitions about the heartbeat warrant unique moral consideration for newly advanced contracting cardiac organoids. Despite the heartbeat's moral significance in organ procurement and abortion discussions, we argue that this significance should not translate into moral implications for cardiac organoids.

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Background: Polyvascular disease is strongly associated with increased risk of cardiovascular morbidity and mortality. However, its prevalence in patients undergoing carotid and lower extremity surgical revascularization and its impact on outcomes are unknown.

Methods: The Vascular Quality Initiative was queried for carotid endarterectomy (CEA) or infrainguinal lower extremity bypass (LEB), 2013-2019.

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Objective: Cumulative, probability-based metrics are regularly used to measure quality in professional sports, but these methods have not been applied to health care delivery. These techniques have the potential to be particularly useful in describing surgical quality, where case volume is variable and outcomes tend to be dominated by statistical "noise." The established statistical technique used to adjust for differences in case volume is reliability-adjustment, which emphasizes statistical "signal" but has several limitations.

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