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Atorvastatin decreases Toll-like receptor 4 expression and downstream signaling in human monocytic leukemia cells.
Cellular Immunology 2012 September
PURPOSE: We aim to evaluate the effects of atorvastatin on the expression of Toll-like receptor (TLR4) protein and mRNA, and to explore their effects on TLR4-dependent downstream signaling in human monocytic leukemia (THP-1) cells.
METHODS: TLR4 protein and mRNA expression, levels of NF-κB protein, and expression of TNF-α, IL-6, and IL-1β in lipopolysaccharide-induced THP-1 cells after incubation with different concentrations of atorvastatin (0.1, 1, 10, 20μM) were quantified via flow-cytometry, quantitative RT-PCR, western blotting, and ELSIA kits.
RESULTS: Atorvastatin incubation resulted in significant decreases in the levels of TLR4 protein and mRNA, NF-κB expression, and levels of TNF-α, IL-6, and IL-1β in LPS-induced THP-1 cells (P<0.01). However, compared with the untreated control, the expression of these were significantly increased (P<0.01).
CONCLUSIONS: Atorvastatin could inhibit the TLR4 expression and TLR4-dependent downstream signaling in THP-1 cells. These observations imply that the interactions with innate immunity may serve as one of the pleiotropic mechanisms of atorvastatin.
METHODS: TLR4 protein and mRNA expression, levels of NF-κB protein, and expression of TNF-α, IL-6, and IL-1β in lipopolysaccharide-induced THP-1 cells after incubation with different concentrations of atorvastatin (0.1, 1, 10, 20μM) were quantified via flow-cytometry, quantitative RT-PCR, western blotting, and ELSIA kits.
RESULTS: Atorvastatin incubation resulted in significant decreases in the levels of TLR4 protein and mRNA, NF-κB expression, and levels of TNF-α, IL-6, and IL-1β in LPS-induced THP-1 cells (P<0.01). However, compared with the untreated control, the expression of these were significantly increased (P<0.01).
CONCLUSIONS: Atorvastatin could inhibit the TLR4 expression and TLR4-dependent downstream signaling in THP-1 cells. These observations imply that the interactions with innate immunity may serve as one of the pleiotropic mechanisms of atorvastatin.
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