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http://dx.doi.org/10.4014/mbl.1610.10006

Inhibitory Efficacy of Dystaenia takeshimana Extract on iNOS, COX-2 Protein and mRNA Expression in Raw 264.7 Cell  

Lee, Jin-Young (Department of Herbal Cosmetic Science, Hoseo University)
Yoo, Dan-Hee (Department of Herbal Cosmetic Science, Hoseo University)
Joo, Da-Hye (Department of Herbal Cosmetic Science, Hoseo University)
Chae, Jung-Woo (Gyeonggi-do Forest Environment Research Institute)
Publication Information
Microbiology and Biotechnology Letters / v.44, no.4, 2016 , pp. 571-576 More about this Journal
Abstract
In this study, the anti-inflammatory activities of the 80% ethanol extract of Dystaenia takeshimana (DT) were investigated using Raw 264.7 cells treated with lipopolysaccharide (LPS). The effect of DT extract on the production of pro-inflammatory factors (iNOS, COX-2) in LPS-stimulated Raw 264.7 macrophages was examined. The cytotoxic effect of DT extract on macrophage cells (Raw 264.7) was examined by the 3-[4, 5-dimethyl-thiazol-2-yl]-2, 5-diphenyl-tetrazoliumbromide (MTT) assay. Treatment with DT extract showed 100% or more cell viability at the concentration $1,000{\mu}g/ml$. The inhibitory effect of DT extract on protein expression of inducible NOS (iNOS) and cyclooxygenase-2 (COX-2) was measured by western blotting using the concentrations 50, 100, and $500{\mu}g/ml$, with ${\beta}-actin$ used as the positive control. Consequently, the protein expression of iNOS, and COX-2 as observed by western blotting, was decreased by 56%, 61.6%, respectively with $500{\mu}g/ml$ DT extract. Inhibition of iNOS and COX-2 mRNA expression was measured by reverse transcription- polymerase chain reaction (PCR) using DT extract concentrations 50, 100, and $500{\mu}g/ml$, with GAPDH used as a positive control. Consequently, the mRNA expression of iNOS and COX-2 as observed by reverse-transcription-PCR was decreased by 77.9% and 83.3%, respectively at $500{\mu}g/ml$ concentration of DT extract. In conclusion, DT extract may affect inflammatory factors as a potential anti-inflammatory agent.
Keywords
Dystaenia takeshimana extract; anti-inflammatory; iNOS; COX-2;
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