紫草 열수 추출물의 RAW 264.7 세포에서 IL-1β, TNF-α, iNOS 유전자 발현에 미치는 영향 연구
Investigation of the Effect of Water Extract of Lithospermi Radix on the Expression of IL-1β, TNF-α and iNOS Genes in Raw 264.7 Cells
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Lithospermi Radix (LR) is known to have an anti-inflammatory effect. However, the mechanisms are not well known. In this study, LPS-induced mouse RAW 264.7 macrophage cells were treated with LR to investigate the time-dependent inflammation response of LR. RAW 264.7 cells were treated with various concentrations of LR for 24 hours, followed by MTS assay. Cell viability was increased at all experimental concentrations. The mRNA expression levels of IL-1β, TNF-α and iNOS were increased by treatment of RAW 264.7 cells with LR at a concentration of 200 μg/ml for 6 hours and 24 hours. Treatment of LR with 200 μg/ml concentration for 6 hours promoted mRNA expression levels of IL-1β, TNF-α and iNOS in LPS-induced RAW 264.7 cells. However, IL-1β, TNF-α and iNOS mRNA expression was suppressed by treatment of LR with 200 μg/ml concentration for 24 hours in LPS-induced RAW 264.7 cells. These results suggest that the effect on inflammation of LR is promptly promoted and then to rapidly alleviate the inflammatory reaction. This study proposes that the time-dependent activities of herbal medicine is a very important factor in analyzing the anti-inflammatory effect of various herbal medicines including LR.
Abstract
Lithospermi Radix (LR) is known to have an anti-inflammatory effect. However, the mechanisms are not well known. In this study, LPS-induced mouse RAW 264.7 macrophage cells were treated with LR to investigate the time-dependent inflammation response of LR. RAW 264.7 cells were treated with various concentrations of LR for 24 hours, followed by MTS assay. Cell viability was increased at all experimental concentrations. The mRNA expression levels of IL-1β, TNF-α and iNOS were increased by treatment of RAW 264.7 cells with LR at a concentration of 200 μg/ml for 6 hours and 24 hours. Treatment of LR with 200 μg/ml concentration for 6 hours promoted mRNA expression levels of IL-1β, TNF-α and iNOS in LPS-induced RAW 264.7 cells. However, IL-1β, TNF-α and iNOS mRNA expression was suppressed by treatment of LR with 200 μg/ml concentration for 24 hours in LPS-induced RAW 264.7 cells. These results suggest that the effect on inflammation of LR is promptly promoted and then to rapidly alleviate the inflammatory reaction. This study proposes that the time-dependent activities of herbal medicine is a very important factor in analyzing the anti-inflammatory effect of various herbal medicines including LR.
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