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• W4286750111 startingPage "27" @default.
• W4286750111 abstract "Caspase-8 transduces signals from death receptor ligands, such as tumor necrosis factor, to drive potent responses including inflammation, cell proliferation or cell death. This is a developmentally essential function because in utero deletion of endothelial Caspase-8 causes systemic circulatory collapse during embryogenesis. Whether endothelial Caspase-8 is also required for cardiovascular patency during adulthood was unknown. To address this question, we used an inducible Cre recombinase system to delete endothelial Casp8 in 6-week-old conditionally gene-targeted mice. Extensive whole body vascular gene targeting was confirmed, yet the dominant phenotype was fatal hemorrhagic lesions exclusively within the small intestine. The emergence of these intestinal lesions was not a maladaptive immune response to endothelial Caspase-8-deficiency, but instead relied upon aberrant Toll-like receptor sensing of microbial commensals and tumor necrosis factor receptor signaling. This lethal phenotype was prevented in compound mutant mice that lacked the necroptotic cell death effector, MLKL. Thus, distinct from its systemic role during embryogenesis, our data show that dysregulated microbial- and death receptor-signaling uniquely culminate in the adult mouse small intestine to unleash MLKL-dependent necroptotic hemorrhage after loss of endothelial Caspase-8. These data support a critical role for Caspase-8 in preserving gut vascular integrity in the face of microbial commensals." @default.
• W4286750111 created "2022-07-23" @default.
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• W4286750111 date "2022-07-23" @default.
• W4286750111 modified "2023-10-17" @default.
• W4286750111 title "Endothelial Caspase-8 prevents fatal necroptotic hemorrhage caused by commensal bacteria" @default.
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• W4286750111 doi "https://doi.org/10.1038/s41418-022-01042-8" @default.
• W4286750111 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/35871233" @default.
• W4286750111 hasPublicationYear "2022" @default.
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