Effects of Volatile Oil and 2-Undecanone from Houttuynia Cordata Thunb. on LPS-TLR4/MD-2-TNF-α Inflammation Signaling Pathway
10.3870/yydb.2014.10.007
- VernacularTitle:鱼腥草挥发油和甲基正壬酮对LPS-TLR4/MD-2-TNF-α炎症通路的影响
- Author:
Jing CHEN
;
Wenqing WANG
;
Chunyang SHI
;
Xiaolong HOU
;
Jin WAN
;
Jianguo FANG
- Publication Type:Journal Article
- Keywords:
Houttuynia cordata Thunb.;
Volatile oil;
2-Undecanone;
TLR4 / MD-2;
Inflammation signal pathway
- From:
Herald of Medicine
2014;(10):1283-1287,1288
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the effects of volatile oil and 2-undecanone from Houttuynia Cordata Thunb. (H. cordata) on LPS-TLR4 / MD-2-TNF-α signaling pathway. Methods TLR4 / MD-2 blocking agent was used to mask the TLR4 /MD-2 site,then protein expression levels of TLR4 in cells treated with volatile oil and 2-undecanone were analyzed by western blot. ELISA was used to detect the secretion of the inflammatory cytokines such as TNF-α,IL-1β and IL-10. Comparison analysis was then performed from the results of cell experiments in vitro and anti-inflammatory effects through xylene-induced ear edema test in vivo. Results In concentrations between 1 to 10 μg · mL-1 ,Houttuynia volatile oil showed better effect than 2-undecanone on inhibition of TLR4 protein in LPS-induced RAW264. 7 cells, and had some differences in the effects on inflammatory factors. Compared with the LPS+TLR4 / MD-2 group,the LPS+TLR4 / MD-2 + volatile oil group had no significant difference in the expression of TLR4 protein (P>0. 05),but the LPS+TLR4 / MD-2 +2-undecanone group reduced the expression of TLR4 protein obviously. It appeared that volatile oil exerts its anti-inflammatory effect through LPS-TLR4 / MD-2-TNF-αpathway,but 2-undecanone may exert its anti-inflammatory effect by other means. Houttuynia volatile oil showed better anti-inflammatory activity than 2-undecanone in vivo at the same dose. Conclusion There are some differences in anti-inflammatory effects and related mechanisms between volatile oil and 2-undecanone, probably owing to the synergistic effects of multi-ingredients in the volatile oil.
