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Modulatory Effects of 21 kinds of Medicinal Herbs Including Herba Pogostemi (Agastache rugosa) on Nitric Oxide Production in Macrophage Cell line RAW 264.7 cells  

Kim, Seung-Hyun (Department of Biological Science, Ajou University)
Kang, Mi-Young (Department of Food science and Nutrition, Kyungpook National University)
Nam, Seok-Hyun (Department of Biological Science, Ajou University)
Publication Information
Applied Biological Chemistry / v.48, no.4, 2005 , pp. 411-417 More about this Journal
Abstract
Aqueous extracts were prepared from 21 medicinal herbs including Herba Pogostemi (Agastache rugosa) to examine their modulatory effects on NO production in mouse macrophage cell line RAW264.7 cells. While almost all medicinal herb extracts failed to show marked scavenging activities to NO produced by LPS stimulation, only Herba Pogostemi showed a rather strong induction of NO production in RAW264.7 cells without stimulation with LPS. When we treated the cell with $200{\mu}M\;of\;N^G-monomethyl-L-arginine\;(N^GMMA)$, a NOS2 inhibitor, a significant reduction in NO production could be observed. Moreover, a treatment of $100{\mu}M$ pyrrolidine dithiocarbamate (PDTC) led to about a 79% reduction of NO production. These results demonstrated that the aqueous extract of Herba Pogostemi might provide a second signal for the expression of NOS2 in RAW264.7 cells, and suggested that Herba Pogostemi induces NO production through L-argininedependent pathway.
Keywords
Herba Pogostemi; Agastache rugosa; Nitric oxide; $N^G-monomethyl-L-arginine$; Pyrrolidine dithiocarbamate;
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