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- W1910712449 abstract "LPS has been implicated in the pathogenesis of Gram-negative bacterial sepsis. Despite intensive efforts to define the LPS-signal transduction pathway, CD14 is the sole molecule clearly demonstrated to possess signaling capabilities. However, it remains unclear whether CD14 is the only LPS-signaling molecule expressed in phagocytes and how CD14-mediated signaling occurs. Compound SDZ 280.961 is a synthetic triacylated amino acid that structurally resembles the reducing sugar moiety of lipid A. SDZ 280.961 effectively stimulated TNF-alpha release from human PBMC. Co-incubation of PBMC with the specific LPS inhibitor Rhodobacter sphaeroides lipid A inhibited SDZ 280.961-mediated stimulation of TNF-alpha release, indicating that this analogue signals mononuclear cells via a LPS-activated signaling pathway. Induction of TNF-alpha release from mononuclear cells by SDZ 280.961 was strongly dependent on the presence of serum and was enabled by the presence of purified LPS-binding protein, characteristics of CD14-mediated signaling. In contrast, SDZ 280.961-mediated signaling was not inhibited by blocking anti-CD14 mAbs. A Chinese hamster ovary fibroblast line transfected with human CD14, which responds to LPS in a manner qualitatively similar to that of macrophage cell lines, failed to respond to SDZ 280.961. Taken together, these data suggest that the lipid A analogue SDZ 280.961 activates monocytes via a unique LPS-signal transduction pathway that appears to be independent of CD14." @default.
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- W1910712449 date "1994-12-01" @default.
- W1910712449 modified "2023-10-16" @default.
- W1910712449 title "Acyclic analogue of lipid A stimulates TNF-alpha and arachidonate release via a unique LPS-signaling pathway." @default.
- W1910712449 doi "https://doi.org/10.4049/jimmunol.153.11.5230" @default.
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