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KMID : 0616120220530010008
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Korean Journal of Pharmacognosy
2022 Volume.53 No. 1 p.8 ~ p.15
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Anti-inflammatory Constituents of Robinia pseudoacacia Root Bark
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Kang Dong-Min
Park Woo-Sung
Kim Hye-Jin
Jeong Woo-Jin
Kang Kwon-Kyoo
Ahn Mi-Jeong
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Abstract
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Robinia pseudoacacia L. (Leguminosae) is widely distributed in Asia, North America and Europe. The root bark has been traditionally used for hemostasis, arthritis and hypertension. Therefore, this study was conducted to identify the biological activity and the bioactive constituents of the root bark. We found that the methanol extract obtained from the root bark of R. pseudoacacia reduced the level of ROS and NO production in LPS-induced inflammation of RAW 264.7 cell line. Among the fractions, methylene chloride fraction showed the highest inhibitory activity against the inflammation. Seven constituents (1-7) were isolated from this fraction, and the chemical structures were determined to be medicarpin (1), (-)-vestitol (2), indole 3-carboxaldehyde (3), 3-acetylindole (4), liquiritigenin (5), 4(1H)-quinolone (6) and 8-methoxyononin (7). Among the isolates, medicarpin (1), (-)-vestitol (2), 3-acetylindole (4) and liquiritigenin (5) inhibited ROS and NO production in a dose-dependent manner. This is the first study to show the anti-inflammatory activity of the root bark of R. pseudoacacia, and it is suggested that the four constituents (1, 2, 4, and 5) could play a role in the biological activity.
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KEYWORD
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Robinia pseudoacacia, Anti-inflammation, Nitric oxide, Reactive oxygen species
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