Article Sidebar
Article Details
Submission of a manuscript to this journal is a representation that the manuscript has not been published previously and is not under consideration for publication elsewhere.
All authors named in each manuscript would be required to sign a form (to be supplied by the Editor) so that they may retain their copyright in the article but to assign to us (the Publishers) and its licensees in perpetuity, in all forms, formats and media (whether known or created in the future) to (i) publish, reproduce, distribute, display and store the contribution, (ii) translate the contribution into other languages, create adaptations, reprints, include within collections and create summaries, extracts and/or abstracts of the contribution, (iii) create any other derivative works(s) based on the contribution, (iv) to exploit all subsidiary rights in the contribution, (v) the inclusion of electronic links from the contribution to third party material where-ever it may be located, and (vi) license any thrid party to do any or all of the above.
Main Article Content
Saussurea lappa Clarke extract exhibits potent antioxidant effect and attenuates neuroinflammatory responses in lipopolysaccharide-stimulated microglial cells
Abstract
Purpose: To investigate the antioxidant and anti-neuroinflammatory potential of Saussurea lappa Clarke (SLC-EA) extract in LPS-stimulated BV-2 microglial cells.
Methods: Cell viability was measured by using the 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide (MTT) assay while antioxidant activity was evaluated by using the DPPH (1,1-diphenyl-2-picrylhydrazyl) radical scavenging activity. Lipopolysaccharide (LPS) was used to stimulate BV-2 microglia. Griess assay was employed to assess nitric oxide (NO) production. iNOS (inducible NO synthase) expression and TNF-α (tumor necrosis factor-alpha) cytokine production were measured by ELISA (enzyme-linked immunosorbent assay) and immuno blot analysis, respectively.
Results: Pretreatment of 100 mg/ml of SLC-EA (p < 0.001) was inhibited Nitric Oxide (NO) by 1 ug/ml of LPS-treated murine BV-2 cells. The expression of iNOS and TNF-α were reduced by SLC-EA concentration dependent manner (p < 0.001 at 100 mg/ml). SLC-EA were scavenged 1, 1-diphenyl-2-picrylhydrazyl (DPPH) radicals in a dose-dependent manner with an IC50 value of approximately 51.4 μg/ml.
Conclusion: The results indicate that SLC-EA extract exhibits strong antioxidant properties and inhibits excessive pro-inflammatory cytokine due probably to the antioxidant phenolic compounds present in SLC-EA extract. Further work in exploring the in-depth mechanisms of SLC-EA extract in regulating inflammatory signaling pathways in treating neuroinflammatory diseases is necessary.
Keywords: Saussurea lappa, Antioxidant, Neuroinflammation, Microglia, TNF-α, iNOS
