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Oct 8, 2024Keywords:
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Main Article Content
Anti-inflammatory and antiprotozoal effect of Hedyotis diffusa and Scutellaria barbata
Abstract
Purpose: To investigate the anti-inflammatory and antiprotozoal effects as well as chemical profile of ethanol extracts of Hedyotis diffusa (Rubiaceae) (HDE) and Scutellaria barbata (Lamiaceae) (SBE).
Methods: Dried whole plants collected in Vietnam were extracted with ethanol (30 and 96 %) by maceration for 4 weeks. The resulting extracts obtained after evaporating the solvent were stored in a refrigerator at 4 oC. Mouse carrageenan-induced inflammation and mouse macrophage cell line RAW264.7 were used to assess the in vivo and in vitro anti-inflammatory activities, respectively, while ciliate, Tetrahymena pyriformis was used to determine antiprotozoal effects. Ultra-high-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UHPLC-Q-TOF-MS) was employed to analyze the chemical profiles of the extracts.
Results: All the extracts manifested anti-inflammatory effects in vitro and in vivo. The HDE exhibited significantly higher in vitro anti-inflammatory activity than SBE (p < 0.05). Furthermore, in vivo antiinflammatory activity was higher in SBE compared to HDE. Both extracts exhibited antiprotozoal effects. The 96 % ethanol extract of both plants were more active than the 30 % ethanol extracts. Analysis by UHPLC‐Q‐TOF- MS revealed the presence of chrysin, apigenin and apigenin derivatives, naringenin, wogonin, quercetin and quercetin derivatives, as well as scutellarin.
Conclusion: The HDE and SBE extracts from Vietnam exhibit significant in vivo and in vitro antiinflammatory activities and in addition, antiprotozoal activity against Tetrahymena pyriformis. These plants, therefore, are potential sources of antiprotozoal agents.
