ArticleMethods in molecular biology (Clifton, N.J.)2023
Caspase-4 Activation and Recruitment to Intracellular Gram-Negative Bacteria.
Article in Methods in molecular biology (Clifton, N.J.), 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The non-canonical inflammasome pathway functions as the primary cytosolic innate immune detection mechanism for Gram-negative bacterial lipopolysaccharide (LPS) in human and mouse cells and controls the proteolytic activation of the cell death executor gasdermin D (GSDMD). The main effectors of this pathways are the inflammatory proteases caspase-11 in mice and caspase-4/caspase-5 in humans. These caspases have been shown to bind LPS directly; however, the interaction between LPS and caspase-4/caspase-11 requires a set of interferon (IFN)-inducible GTPases, known as guanylate-binding proteins (GBPs). These GBPs assemble to form coatomers on cytosolic Gram-negative bacteria, which function as recruitment and activation platforms for caspase-11/caspase-4. Here we describe an assay to monitor caspase-4 activation in human cells by immunoblotting and its recruitment to intracellular bacteria using the model pathogen Burkholderia thailandensis.
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