Schisandra chinensis (Schisandraceae) is a medicinal plant widely used in traditional Chinese medicine. Under the name Wu Wei Zi, it is used to treat many diseases, especially as a stimulant, adaptogen, and hepatoprotective. Dibenzocyclooctadiene lignans are the main compounds responsible for the effect of S. chinensis. As a part of ongoing studies to identify and evaluate anti-inflammatory natural compounds, we isolated a series of dibenzocyclooctadiene lignans and evaluated their biological activity. Furthermore, we isolated new sesquiterpene 7,7-dimethyl-11-methylidenespiro[5.5]undec-2-ene-3-carboxylic acid. Selected dibenzocyclooctadiene lignans were tested to assess their anti-inflammatory potential in LPS-stimulated monocytes by monitoring their anti-NF-κB activity, antioxidant activity in CAA assay, and their effect on gap junction intercellular communication in WB-ras cells. Some S. chinensis lignans showed antioxidant activity in CAA mode and affected the gap junction intercellular communication. The anti-inflammatory activity was proven for (-)-gomisin N, (+)-γ-schisandrin, rubrisandrin A, and (-)-gomisin J.

Department of Molecular Pharmacy Faculty of Pharmacy Masaryk University 61200 Brno Czech Republic

Department of Natural Drugs Faculty of Pharmacy Masaryk University 61200 Brno Czech Republic

Department of Pharmaceutical and Pharmacological Sciences University of Padova 35131 Padua Italy

Recetox Faculty of Science Masaryk University 62500 Brno Czech Republic

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