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• W2159808743 abstract "We have identified acid sphingomyelinase (ASM) as an important player in the early and late anti-Salmonella activity of macrophages. A functional ASM participated in the killing activity of macrophages against wild-type Salmonella enterica serovar Typhimurium. The role of ASM in early macrophage killing of Salmonella appears to be linked to an active NADPH phagocyte oxidase enzymatic complex, since the flavoprotein inhibitor diphenyleneiodonium not only blocked a productive respiratory burst but also abrogated the survival advantage of Salmonella in macrophages lacking ASM. Lack of ASM activity also increased the intracellular survival of an isogenic DeltaspiC::FRT Salmonella strain deficient in a translocator and effector of the Salmonella pathogenicity island 2 (SPI2) type III secretion system, suggesting that the antimicrobial activity associated with ASM is manifested regardless of the SPI2 status of the bacteria. Constitutively expressed ASM is responsible for the role that this lipid-metabolizing hydrolase plays in the innate host defense of macrophages against Salmonella. Accordingly, the ASM activity and intracellular concentration and composition of ceramide, gangliosides, and neutral sphingolipids did not increase upon Salmonella infection. Salmonella triggered, nonetheless, a significant increase in the secreted fraction of ASM. Collectively, these findings have elucidated a novel role for constitutive ASM in the anti-Salmonella activity of murine macrophages." @default.
• W2159808743 created "2016-06-24" @default.
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• W2159808743 date "2007-11-01" @default.
• W2159808743 modified "2023-09-23" @default.
• W2159808743 title "Constitutive Acid Sphingomyelinase Enhances Early and Late Macrophage Killing of <i>Salmonella enterica</i> Serovar Typhimurium" @default.
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• W2159808743 doi "https://doi.org/10.1128/iai.00689-07" @default.
• W2159808743 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2168317" @default.
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• W2159808743 hasPublicationYear "2007" @default.
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