Anti-Inflammatory Effect of Anemarrhenae Rhizoma 80% Ethanol Extract in RAW 264.7 cells

Objective : According to recent studies, Anemarrhenae Rhizoma has anti-inflammatory activities of DW extract, but it hasn't not yet conducted to evaluate inflammatory factors about 80% ethanol extract. Therefore, The aim of this study is to investigate the various effects of individual or combined 80% ethanol extract of Anemarrhenae Rhizoma on cell viability and various anti-inflammatory factors. Methods : Anemarrhenae Rhizoma extract was prepared with 80% ethanol. MTT assay, ELISA, and Luminex were performed in LPS-activated RAW 264.7 cell line to measure cytotoxicity, Nitric oxide (NO), cyclooxygenase-2 (COX-2), prostaglandin E2 ($PGE_2$), Leukotriene B4 ($LTB_4$), and cytokines ($IL-1{\beta}$, IL-6, and $TNF-{\alpha}$), respectively. Results : At concentration of $200{\mu}g/m{\ell}$ Anemarrhenae Rhizoma extract, cytotoxicity was observed in RAW 264.7 cells. However, at concentration less than $100{\mu}g/m{\ell}$ of Anemarrhenae Rhizoma, cytotoxicity was not observed in RAW 264.7 cells. All concentration of Anemarrhenae Rhizoma extract showed no difference of NO, and $IL-1{\beta}$level in RAW 264.7 cells compared with control group. In contrast, at concentration of $100{\mu}g/m{\ell}$ Anemarrhenae Rhizoma extract significantly inhibited LPS-induced production of COX-2, PGE2, and $LTB_4$ level in RAW 264.7 cells. In addition, the production of proinflammatory cytokines (IL-6, $TNF-{\alpha}$) in LPS-induced RAW 264.7 cells was significantly decreased at concentration of all or 10, and $100{\mu}g/m{\ell}$, respectively. Conclusion : These findings demonstrate that Anemarrhenae Rhizoma has inhibitory effect on inflammatory mediators in LPS-activated RAW 264.7 cells showing possible developed as a raw material for new therapeutics to ease the symptoms related with inflammatory.

RAW 264.7 세포에서 지모(知母) 80% 에탄올 추출물의 항염증 효과