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Inhibitory Effects on the Enzymes Involved in the Inflammation by the Ethanol Extracts of Plant Foodstuffs  

Kwon, Eun-Sook (Department of Food and Nutrition, College of Human Ecology, Seoul National University)
Kim, Il-Rang (Department of Food and Nutrition, College of Human Ecology, Seoul National University)
Kwon, Hoon-Jeong (Department of Food and Nutrition, College of Human Ecology, Seoul National University, Research Institute of Human Ecology, Seoul National University)
Publication Information
Korean Journal of Food Science and Technology / v.39, no.3, 2007 , pp. 348-352 More about this Journal
Abstract
Inflammation is a complex process resulting from a variety of mechanisms. Combined inhibition of the activities of enzymes involved in the process may therefore be considered more important in anti-inflammatory property of plant extracts than any single contribution. In this study, the inhibitory effects of the ethanol extracts of thirty plant foods on the activities of secretory phospholipase $A_{2}$ ($sPLA_{2}$), cyclooxygenase-1 (COX-1), cyclooxygenase-2 (COX-2), and 12-lipoxygenase (12-LOX) were examined. Several legumes, mungbean sprout and some leaf vegetables inhibited the activity of $sPLA_2$, upstream enzyme of inflammation pathway. Only soybean sprout and mungbean sprout significantly inhibited 12-LOX activity. Although most of extracts inhibited the activities of both COX-1 and COX-2, water dropwort and amaranth showed selectivity for the inhibition of COX-2 over COX-1. Especially, mungbean showed anti-inflammatory property at both upstream and downstream of inflammation pathway with relatively low $IC_{50}$ values for $sPLA_{2}$ and COX-2 enzymes. Mungbean sprout exhibited inhibitory effects on all enzymes related to early and late inflammation and soybean sprout suppressed 12-LOX and COX-2 simultaneously, although the activities of these plants were showed at relatively high concentration. Therefore, mungbean, mungbean sprout, and soybean sprout appear to exhibit anti-inflammatory effects by combined inhibition of inflammatory enzymes.
Keywords
inflammation; secretory phospholipase $A_{2}$; cyclooxygenase-l; cyclooxygenase-2; 12-lipoxygenase;
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