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Inhibitory Activity against Helicobacter pylori of Isolated Compounds from Pinus koraiensis Siebold et Zucc Leaves
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 Title & Authors
Inhibitory Activity against Helicobacter pylori of Isolated Compounds from Pinus koraiensis Siebold et Zucc Leaves
Jo, Bun-Sung; Cho, Young-Je;
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 Abstract
A phenol substance was extracted from Pinus koraiensis Siebold et Zucc leaf extracts and its biological efficacy was measured. The highest content of the phenol substance contained in Pinus koraiensis Siebold et Zucc leaves was 13.5 mg/g, which was obtained when it was extracted with 80% ethanol. At a concentration of 200 mg/mL, the phenolic substances extracted with 80% ethanol and water showed antimicrobial activities against Helicobacter pylori, producing clear zones of 10 and 12 mm diameter, respectively. Pinus koraiensis Siebold et Zucc. leaf extracts were separated using a Sephadex LH-20 column and 4 fractions were obtained (fractions A-D). Fractions C and D showed the greatest inhibitory activity against Helicobacter pylori producing 10.1 and 12.3 mm clear zones, respectively. These two fractions were purified using a Sephadex LH-20 and MCI-gel column ( ethanol). Purified compounds A and B were identified as syringic acid and compound C was identified as p-coumaric acid based on -nuclear magnetic resonance (NMR), -NMR, and fast atom bombardment mass spectrometry spectra. When two or more purified compounds were mixed, a synergistic effect of anti-Helicobacter pylori activity was evident. This result indicates that extracts of Pinus koraiensis Siebold et Zucc leaves could be considered a functional food because of their high antimicrobial properties.
 Keywords
Helicobacter pylori;identification;inhibitor;Pinus koraiensis leaves;purification;
 Language
English
 Cited by
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