Simultaneous Supercritical Fluid Extraction of Heather (Calluna vulgaris L.) and Marigold (Calendula officinalis L.) and Anti-Inflammatory Activity of the Extracts
APPLIED SCIENCES-BASEL(2019)
摘要
Heather (Calluna vulgaris L.) and marigold (Calendula officinalis L.) are two rich sources of bioactive pentacyclic triterpenes. The supercritical carbon dioxide (SCCO2) extraction of these two plants was explored at a pressure range of 25-50 MPa, 50 degrees C, with or without fractionation, different extraction times (1.5-4.0 h) and using ethanol as a co-solvent (0 and 10% w/w). In order to determine potential synergisms, a combined extraction (heather + marigold 50:50) was also studied. In general, higher extraction yields were achieved when the co-solvent was added. Higher concentrations of total triterpenic acids were obtained in heather extracts, specially using ethanol. The co-solvent did not increase the terpene concentration in marigold extracts. For the combined extraction, an antagonist effect in the triterpene concentration was observed in absence of a co-solvent, whereas a synergistic effect was exhibited in its presence, especially for ursolic acid. In general, the extracts showed a certain anti-inflammatory effect, although a straight correlation with the analyzed triterpenic acids concentration was not exhibited. Moreover, the combined extraction exposed a similar anti-inflammatory activity in comparison with the individual plant extracts.
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关键词
supercritical fluid extraction,anti-inflammatory,marigold,heather,combined extraction,triterpenic acids
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