Original Article | Open Access
Lei Zhao, Jun-Yan Tao, Shu-Ling Zhang, Feng Jin, Ran Pang, Ji-Hua Dong, "N-Butanol Extract from Melilotus suaveolens Ledeb Affects Pro- and Anti-Inflammatory Cytokines and Mediators", Evidence-Based Complementary and Alternative Medicine, vol. 7, Article ID 981719, 10 pages, 2010. https://doi.org/10.1093/ecam/nem165
N-Butanol Extract from Melilotus suaveolens Ledeb Affects Pro- and Anti-Inflammatory Cytokines and Mediators
Melilotus suaveolens Ledeb is a traditional medicinal plant for treating inflammation-related disease. This explores the inner anti-inflammatory mechanism of n-butanol extract from M. suaveolens Ledeb. Inflammatory cellular model was established by lipopolysaccharide intervention on RAW264.7 cell line. Levels of secreted cytokines TNF-α, IL-1β, IL-6, NO and IL-10 in supernatant, mRNA expression of TNF-α, COX-2, iNOS and HO-1, protein expression of COX-2 and HO-1, activation of NF-κB and ingredients in the extract were assayed by ELISA, real time quantitative PCR, western blot, immunocytochemical test and HPLC fingerprint test, respectively. As a result, the extract could not only markedly reduce the production of pro-inflammatory mediators to different extents by blocking NF-κB activation but also promote the release of anti-inflammatory mediator HO-1 significantly. Each 1 g extract contained 0.023531 mg coumarin and another two high polar ingredients, probably saponins. It can be concluded that the extract has similar effects on antagonizing pro-inflammatory mediators and cytokines like Dexamethasone, and has effects on promoting the production of anti-inflammatory mediators.
Copyright © 2010 Lei Zhao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.