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  • Title: The production of nitric oxide and prostaglandin E2 in peritoneal macrophages is inhibited by Andrographis paniculata, Angelica sinensis and Morus alba ethyl acetate fractions.
    Author: Chao WW, Kuo YH, Li WC, Lin BF.
    Journal: J Ethnopharmacol; 2009 Feb 25; 122(1):68-75. PubMed ID: 19111919.
    Abstract:
    AIM OF THE STUDY: Traditional Chinese medicine herbs (TCMHs) are used in medicines as well as in daily dietary supplements in Asia. In this study, we employed pNF-kappaB-Luc or pIFN-gamma-Luc and BALB/c mice peritoneal macrophages or splenocytes to investigate both the immune and inflammatory effects of six selected plant species. MATERIALS AND METHODS: Specifically, we used ethyl acetate fractions of Astragalus membranaceus (Fisch.) Bunge var. mongholicus (Bunge) Hsiao (Fabaceae) (AM), Andrographis paniculata (Burm. f.) Nees (Acanthaceae) (AP), Angelica sinensis (Oliv.) Diels (Apiaceae) (AS), Eucommia ulmodes Oliv. (Eucommiaceae) leaves (EU leaves), Isatis indigotica Fort. (Brassicaceae) (II) and Morus alba L. (Moraceae) (MA). RESULTS: We found that ethyl acetate fractions of AP, AS and MA significantly decreased NF-kappaB luciferase activity and also the secretion of NO and PGE(2) in LPS/IFN-gamma stimulated mouse peritoneal macrophages (p<0.05). In contrast, they did not affect IFN-gamma luciferase activity or IFN-gamma production in concanavalin A (Con A)-activated mouse splenocytes. Our results indicated that the anti-inflammatory properties of these plant extracts might be resulted from the inhibition of pro-inflammatory mediators (e.g., NO and PGE(2)), at least in part via suppression of a signaling pathway such as NF-kappaB. CONCLUSIONS: Collectively, we have found that three potent bioactive TCMH species exerted significant NF-kappaB inhibitory activity and acted in a cell type dependent fashion.
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