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  • P-ISSN 1010-0695
  • E-ISSN 2288-3339

Inhibitory Effect of Rosmarinic acid Extrcted from Euonymus Alatus on Cyclooxygenase-2

Journal of Korean Medicine / Journal of Korean Medicine, (P)1010-0695; (E)2288-3339
2008, v.29 no.5, pp.111-117

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Abstract

Objectives and methods:Previous mechanistic studies suggest the cyclooxygenase-2 (COX-2) inhibitors represent the good candidates against tumor progression. MeOH extract of the stem barks of Euonymus alatus induced the strong inhibition of COX-2. A phenolic compound responsible for the anti- COX-2 known to involve in tumor adhesion and invasion has been studied through the methanol extracts. The compound, rosmarinic acid (ROS-A) was an ester of caffeic acid and 3,4-dihydroxyphenyllactic acid. ROS-A showed a strong inhibitory effect of COX-2 activity in a concentration-dependent manner. Then we have measured the IL-1β, IL-6 and TNF-α production related the immune regulation, induction of inflammatory related genes. Results and Conclusions:Hep3B cells produce proinflammatory cytokines of IL-1β, IL-6 and TNF-α while ROS A inhibited the cytokines production. Since IL-1β, IL-6 and TNF-α need the transcription factors such as nuclear factor-κB (NF-κB) and activated protein-1 (AP-1), we measured the transcription factors. ROS-A inhibited the activation of p65, p50, c-Rel subunits of NF-κB and AP-1 transcription factors. These findings indicate that ROS A from the stem bark of E. alatus inhibits proliferation in metastatic cancer cells. It was suggested that stem barks of E. alatus could be suitable for anti-cancer drugs.

keywords
Euonymus alatus, cyclooxygenase-2, Rosmarinic acid, transcription factor, cytokines


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