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- W4247372287 abstract "Abstract Background: Salmonella enterica serovar Typhimurium (S. Typhimurium) is an important infectious disease pathogen. Recently, there are increasing researches about the relationship between apoptosis and glycolysis of cells. Previous studies have identified that S. Typhimurium secreted effector K3 (SseK3) is a novel translated and secreted protein. However, there is no study about the role of sseK3 in the relationship between apoptosis and glycolysis of cells infected with S. Typhimurium. It is unclear whether this protein exerts a significant role in the progress of apoptosis and glycolysis in macrophages. Results: The S. Typhimurium SL1344 wild-type (WT) group, ΔsseK3 mutant group and sseK3-complemented group were used to infect macrophages and the effects of sseK3 on apoptosis and glycolysis of macrophages were investigated. The adherence and invasion of ΔsseK3 mutant group for macrophages were similar to WT group and sseK3-complemented group, indicating that SseK3 did not play an important role in the adherence and invasion of S. Typhimurium for macrophages. However, the apoptosis percentage of the ΔsseK3 mutant group was much lower than WT group and sseK3-complemented group using flow cytometry. The caspase-3, caspase-8 and caspase-9 enzyme activity of the ΔsseK3 mutant group were decreased significantly compared with WT group and sseK3-complemented group, which suggested that sseK3 could improve the activities of caspase-3, caspase-8 and caspase-9 enzyme. We also found that the pyruvic acid level did not significantly change among ΔsseK3 mutant group, WT group and sseK3-complemented group, but the lactic acid level of ΔsseK3 mutant group was much lower than WT group and sseK3-complemented group. The ATP level of ΔsseK3 mutant group was remarkably higher than WT group and sseK3-complemented group. These indicated that the sseK3 enhanced the level of glycolysis of macrophages infected by S. Typhimurium. Conclusions: Our data showed that the sseK3 of S. Typhimurium involved in promoting macrophages apoptosis and influencing glycolysis levels of macrophages. These results may give a better clue about the relationship between apoptosis and glycolysis in macrophages induced by S. Typhimurium sseK3." @default.
- W4247372287 created "2022-05-12" @default.
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- W4247372287 date "2020-02-18" @default.
- W4247372287 modified "2023-10-16" @default.
- W4247372287 title "The Salmonella enterica serovar Typhimurium sseK3 induce cell apoptosis and enhance glycolysis in macrophages" @default.
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- W4247372287 doi "https://doi.org/10.21203/rs.2.17312/v2" @default.
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