Journal
ANTIOXIDANTS
Volume 10, Issue 7, Pages -Publisher
MDPI
DOI: 10.3390/antiox10071071
Keywords
Lactobacillus brevis; Paeonia Radix; pyrogallol; antioxidant; anti-inflammatory; RAW 264; 7 macrophage cells
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Fermentation of the herbal extract with the plant-derived lactic acid bacterial strain led to the generation of a new bioactive compound, pyrogallol, which exhibited dose-dependent inhibition of inflammatory responses. This suggests that it may be a practical strategy to produce medicines and supplements for healthcare.
Fermentation of medicinal herbs can be a significant technique to obtain bioactive compounds. Paeoniae Radix (PR) used in the present study is a well-known herbal medicine that exhibits anti-inflammatory and immunomodulatory activity. The aim of this study is to explore the possibility that a bioactive compound is newly generated in PR extract by fermentation with a plant-derived lactic acid bacteria Lactobacillus brevis 174A. We determined the anti-inflammatory activities in lipopolysaccharide (LPS)-stimulated RAW 264.7 macrophage cells. The PR extract fermented with Lactobacillus brevis 174A markedly increased the total phenolic content, decreased intracellular ROS levels, inhibited the release of nitric oxide (NO). It also suppressed inflammatory cytokines IL-6, TNF-alpha, while simultaneously downregulating the gene expressions of iNOS, IL-6, TNF-alpha, and IL-1 beta compared to the unfermented PR extract. Furthermore, the bioactive compound newly generated from the fermentation was identified as pyrogallol. It inhibits the inflammatory responses in a dose-dependent manner suggesting that fermentation of the herbal extract used as a medium together with the plant-derived lactic acid bacterial strain may be a practical strategy to produce medicines and supplements for healthcare.
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