Anti-inflammatory activities and mechanisms of Artemisia asiatica ethanol extract

作者：Jeong Deok; Yi Young Su; Sung Gi Ho; Yang Woo Seok; Park Jae Gwang; Yoon Keejung; Yoon Deok Hyo; Song Changsik; Lee Yunmi; Rhee Man Hee; Kim Tae Woong; Kim Jong Hoon^*; Cho Jae Youl

来源：Journal of Ethnopharmacology, 2014, 152(3): 487-496.

DOI：10.1016/j.jep.2014.01.030

• Artemisia asiatica Nakai
• Compositae
• Transcription factor
• Inflammatory mediator
• Target enzyme
• Gastric ulcer

Ethnopharmacological relevance: Artemisia asiatica Nakai (Compositae) is a representative herbal plant used to treat infection and inflammatory diseases. Although Artemisia asiatica is reported to have immunopharmacological activities, the mechanisms of these activities and the effectiveness of Artemisia asiatica preparations in use are not known. %26lt;br%26gt;Materials and methods: To evaluate the anti-inflammatory activities of Artemisia asiatica ethanol extract (Aa-EE), we assayed nitric oxide (NO), tumor necrosis factor (TNE)-alpha, and prostaglandin E-2 (PGE(2)) in macrophages and measured the extent of tissue injury in a model of gastric ulcer induced in mice by treatment with MCI in EtOH. Putative enzymatic mediators of Aa-EE activities were identified by nuclear fractionation, reporter gene assay, immuoprecipitation, immunoblotting, and kinase assay. Active compound in Aa-EE was identified using HPLC. %26lt;br%26gt;Results: Treatment of RAW264.7 cells and peritoneal macrophages with Aa-EE suppressed the production of NO, PGE(2), and TNF-alpha in response to lipopolysaccharide (LPS) and induced heme oxygenase-1 expression. The Aa-EE also ameliorated symptoms of gastric ulcer in HCl/EtOH-treated mice. These effects were associated with the inhibition of nuclear translocation of nuclear factor (NF)-kappa B and activator protein (AP)-1, implying that the anti-inflammatory action of the Aa-EE occurred through transcriptional inhibition. The upstream regulatory signals Syk and Src for translocation of NE-kappa B and TRAF6 for AP-1 were identified as targets of this effect. Analysis of Aa-EE by HPLC revealed the presence of luteolin, known to inhibit NO and PGE(2) activity. %26lt;br%26gt;Conclusion: The anti-inflammatory activities attributed to Artemisia asiatica Nakai in traditional medicine may be mediated by luteolin through inhibition of Src/Syk/NF-kappa B and TRAF6/JNK/AP-1 signaling pathways.

• 出版日期2014-3-28