4.7 Article

In Vitro Anti-inflammatory Activity of Larch (Larix decidua L.) Sawdust

期刊

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 56, 期 24, 页码 11688-11693

出版社

AMER CHEMICAL SOC
DOI: 10.1021/jf8024002

关键词

Larix decidua L.; larch sawdust; cyclooxygenase; lipoxygenase; anti-inflammatory; diterpene; abietane; labdane; pimarane

资金

  1. European Union [513949]

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The influence of larch (Larix decidua L.) sawdust extracts on arachidonate metabolism has been evaluated in vitro. Extracts of different polarities were tested for their ability to inhibit prostaglandin formation by COX-1 and COX-2 and LTB4 formation by 5-LOX. The lipophilic n-heptane extract showed the highest activity (IC50 values: COX-1, 5 mu g/mL; COX-2, 0.1 mu g/mL; LTB4 assay, 11.1 mu g/mL). A series of abietane, pimarane, and labdane type diterpenes isolated from this extract turned out to be potent inhibitors of LTB4 product formation, whereas their COX inhibitory activity was less pronounced. From the abietane type diterpenes, compounds possessing a 7,13-abietadiene skeleton were better inhibitors of LTB4 formation than those with an 8, 11, 13-abietatriene skeleton. Compounds bearing an OH group in position 4 were more active than those substituted with a COOH group, and methylation of the COOH group led to an almost complete loss of LTB4 formation inhibitory activity.

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