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- W659220218 abstract "Bactericidal/permeability-increasing protein (BPI) can bind to and specifically neutralize lipopolysaccharide (LPS) from the outer membrane of Gram-negative bacteria. In order to evaluate potent LPS-neutralizing activity of bovine BPI, the full-length coding sequence (1 449bp) or 714 bp N-terminal coding sequence (BPI714) of bovine BPI was transfected into mHEK293 cells and the expression of LPS-induced inflammatory cytokines was studied. First, we constructed the lentiviral expression vectors and generated mHEK293 cells stably expressing recombinant bovine BPI or BPI714. Then, we detected the expression of IL-8, IL-1β, TNF-α, NF-κB-1 and NF-κB-2 genes by real-time PCR at 0, 1, 3, 6, 12, 24, 36 and 48 h post of LPS induction in cells with or without recombinant bovine BPI or BPI714 ectopic expression, respectively. In response to LPS, the robust abundance of inflammatory cytokines including IL-8, IL-1β, TNF-α and NF-κB-2 was observed in wild type mHEK293 cells at eachtime point. On the contrary, mRNA abundance of IL-8, TNF-α and NF-κB-2 in transfected mHEK293 cells showed no significant changes at each indicated time point. Our results demonstrated that recombinant bovine full length BPI or BPI714 down-regulated the expression of inflammatory cytokines and revealed that either of bovine BPI or BPI714 was able to inhibit the immune respond stimulated by LPS. This study provides evidence for further investigating the mechanisms and application of BPI/LPS-neutralizing activity and also documents a reliable approach for analysis of the efficacy of antibacterial proteins." @default.
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- W659220218 date "2015-02-01" @default.
- W659220218 modified "2023-09-23" @default.
- W659220218 title "[Effects on the expression of lipopolysaccharide-induced inflammatory cytokines mediated by bovine bactericidal/permeability-increasing protein]." @default.
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