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Kim, Moon-Moo,Rajapakse, Niranjan,Kim, Se-Kwon John Wiley Sons, Ltd. 2009 Phytotherapy research Vol.23 No.5
<P>Nowadays, much attention has been paid to the development of anti-inflammatory agents from marine natural resources. As a result of screening anti-inflammatory agents from marine algae using immunoassay, we found for the first time that ethanolic extract of Ishige okamurae (IO) classified into brown algae was effective in inhibiting the production of inflammatory mediators, such as tumor necrosis factor-&agr;, interleukin-1&bgr;, interleukin-6 and prostaglandin E<SUB>2</SUB>, in RAW264.7 cells stimulated by lipopolysaccharide, compared with dexamethasone and aspirin used as positive control in this study. Moreover, transcriptional activation of NF-&kgr;B transcription factor that regulates the expression of these inflammatory mediators was also examined using reporter gene assay and western blot analysis. It was observed that IO extract exerted anti-inflammatory effect via inactivation of NF-&kgr;B transcription factor in macrophages. In addition, the expression and activity of matrix metalloproteinase-2 and 9 that play an important role in chronic inflammation were decreased in dose-dependent manner in the presence of IO extract in HT1080 cells. The above results suggest that IO extract can inhibit inflammation through inactivation of NF-&kgr;B transcription factor in macrophage. Copyright © 2008 John Wiley & Sons, Ltd.</P>
Therapeutic Prospectives of Chitin, Chitosan and Their Derivatives
김세권,Ngo Dai Nghiep,Niranjan Rajapakse 한국키틴키토산학회 2006 한국키틴키토산학회지 Vol.11 No.1
Chitin and chitosan have recently attracted commercial interest not only as a potential source for pharmaceutical applications but also for their beneficial effects on human health. The area of chitin and chitosan research is indeed extremely important for both fundamental and applied perspectives and extensive studies have been conducted on the general aspects of chemical and biological properties and biotechnological applications in regenerative medicine, veterinary medicine and other health-care industries. Furthermore, therapeutic potential of chitin, chitosan and their derivatives has been studied on the basis of their biological activities such as antimicrobial, antitumor, immnostimulation and anticoagulant effects. This report reviews knowledge of the biological properties and potential therapeutic applications of chitin, chitosan and their derivatives in recent years.