115 research outputs found

    The Effects of Active Shootings on 4-H Youth and Families

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    The effects of active shootings should be a priority to provide needed assistance to 4-H youth and families in coping with their social-emotional well-being. Exposure to such violence can lead to lasting impacts on youth that can affect behavior. Addressing this sensitive topic is crucial in ensuring that Extension professionals are prepared to meet the needs of youth and families. Higher rates of depression, aggression, to name a few, are a result of having witnessed such events as a shooting. Providing training for Extension personnel can aid in reducing the amount of PTSD and other social-emotional trauma

    Serine Protease Autotransporters of Enterobacteriaceae (SPATEs): Biogenesis and Function

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    Serine Protease Autotransporters of Enterobacteriaceae (SPATEs) constitute a large family of proteases secreted by Escherichia coli and Shigella. SPATEs exhibit two distinct proteolytic activities. First, a C-terminal catalytic site triggers an intra-molecular cleavage that releases the N-terminal portion of these proteins in the extracellular medium. Second, the secreted N-terminal domains of SPATEs are themselves proteases; each contains a canonical serine-protease catalytic site. Some of these secreted proteases are toxins, eliciting various effects on mammalian cells. Here, we discuss the biogenesis of SPATEs and their function as toxins

    The Versatility of the Helicobacter pylori Vacuolating Cytotoxin VacA in Signal Transduction and Molecular Crosstalk

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    By modulating important properties of eukaryotic cells, many bacterial protein toxins highjack host signalling pathways to create a suitable niche for the pathogen to colonize and persist. Helicobacter pylori VacA is paradigm of pore-forming toxins which contributes to the pathogenesis of peptic ulceration. Several cellular receptors have been described for VacA, which exert different effects on epithelial and immune cells. The crystal structure of VacA p55 subunit might be important for elucidating details of receptor interaction and pore formation. Here we discuss the multiple signalling activities of this important toxin and the molecular crosstalk between VacA and other virulence factors
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