Publications by authors named "I M Arnold"

Article Synopsis
  • IgA antibodies play a crucial role in defending against mucosal pathogens like Helicobacter pylori and Citrobacter rodentium, with strong local IgA responses observed during infections.
  • The study shows that production of IgA involves various immune components, including Peyer's patches and specific T-cells, and is influenced by bacterial factors like type IV secretion systems.
  • Interestingly, while IgA helps control H. pylori effectively, its absence leads to severe infections and weight loss with C. rodentium, highlighting that IgA's effects can vary depending on the pathogen involved.*
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Eosinophils are bone marrow-derived granulocytes that are traditionally associated with type 2 immune responses, such as those that occur during parasite infections and allergy. Emerging evidence demonstrates the remarkable functional plasticity of this elusive cell type and its pleiotropic functions in diverse settings. Eosinophils broadly contribute to tissue homeostasis, host defence and immune regulation, predominantly at mucosal sites.

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Background: Older patients presenting to the emergency department (ED) after falling are increasingly prevalent. Falls are associated with functional decline and death. Biomarkers predicting short-term mortality might facilitate decisions regarding resource allocation and disposition.

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Eosinophils are a class of granulocytes with pleiotropic functions in homeostasis and various human diseases. Nevertheless, they are absent from conventional single-cell RNA sequencing atlases owing to technical difficulties preventing their transcriptomic interrogation. Consequently, eosinophil heterogeneity and the gene regulatory networks underpinning their diverse functions remain poorly understood.

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Objective: To compare the SUHB mobility scale (i.e., stable(S), unstable gait(U), needing help to walk(H), or bedridden(B)) and the Emergency Severity Index (ESI) associations with admission and mortality outcomes.

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