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http://dx.doi.org/10.5352/JLS.2022.32.10.792

Antioxidant and Antibacterial Activities of Extracts from Different Parts of Sophora japonica L.  

Park, Min Jeong (Department of Pharmaceutical Engineering, Gyeongsang National University)
Kim, Hye Soo (Department of Pharmaceutical Engineering, Gyeongsang National University)
Kim, Han Bi (Department of Pharmaceutical Engineering, Gyeongsang National University)
Lee, Sang Gyun (Department of Pharmaceutical Engineering, Gyeongsang National University)
Cho, Soo Jeong (Department of Pharmaceutical Engineering, Gyeongsang National University)
Publication Information
Journal of Life Science / v.32, no.10, 2022 , pp. 792-802 More about this Journal
Abstract
In this study, the antioxidant and antibacterial activities of Sophora japonica extracts were investigated to determine the potential of S. japonica as a functional food and medicinal materials. S. japonica was divided into flowers, fruits, and branches, and ethanol extraction was used. The total polyphenol and flavonoid contents were significantly higher in the flower and fruit extracts than in the branch extracts, but the ABTS and DPPH radical scavenging activity and ORAC value were higher in the branch extracts. Among the ethanol extracts of S. japonica, branch extracts showed strong antibacterial activity against Porphyromonas gingivalis, and the MIC was 0.2 mg/ml. Branch extracts showed bacteriostatic activity against P. gingivalis at a concentration of 0.4 mg/ml or less and bactericidal activity at a concentration of 0.6 mg/ml or more. Biofilm biomass production and cell growth of P. gingivalis in the culture medium treated with the branch extract at a concentration of 0.2-2.0 mg/ml were significantly decreased in a concentration-dependent manner. In addition, the mRNA expression of fimA and mfa1 associated with fimbriae formation in these cultures was suppressed in a concentration-dependent manner. Based on these results, S. japonica branch extracts can be used as functional food and medicinal materials, as demonstrated by their antioxidant and antibacterial activities against P. gingivalis and the inhibition of biofilm formation resulting from P. gingivalis.
Keywords
Antibacterial activity; antioxidant activity; biofilm biomass; Porphyromonas gingivalis; Sophora japonica;
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