Biomolecules & Therapeutics

The Korean Society of Applied Pharmacology (한국응용약물학회)
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Anti-gastritic Effects of Magnolol and Honokiol from the Stem Bark of Magnolia obovata

  • Cho, So-Yean (College of Pharmacy, Duksung Women's University) ;
  • Lee, Je-Hyuk (Plant Resources Research Institute, Duksung Women's University) ;
  • Bae, Ki-Hwan (College of Pharmacy, Chungnam National University) ;
  • Kim, Yeong-Shik (Natural Products Research Institute, Seoul National University) ;
  • Jeong, Choon-Sik (College of Pharmacy, Duksung Women's University)
  • Published : 2008.09.30
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Abstract

In this study we investigated the effects of Magnolia Bark (MB) extract and its constituents, such as honokiol and magnolol, on gastritis in rats and the growth of human gastric cancer cells. The MB extract, honokiol, and magnolol showed the acid-neutralizing capacities, the antioxidant activities, and the inhibitory effect on the growth of Helicobacter pylori (H. pylori.) at the dose of $50\;{\mu}g/ml$ and over, which is equivalent to that of ampicillin ($100\;{\mu}g/ml$). Honokiol and magnolol had no significant cytotoxicity to human gastric caner cells (AGS and SNU638). However, the MB extract had cytotoxic activity against AGS gastric cancer cell. The MB extract, honokiol, and magnolol significantly inhibited HCI-ethanol-induced gastric lesions without clear change of mucus content. In pylorus ligated rats, honokiol significantly decreased the volume of gastric secretion and gastric acid output, and increased the pH. Magnolol increased the mucus content to almost the same as the control group at oral doses of 50 mg/kg. Therefore, we could guess that antigastritic action of honokiol and magnolol may be associated with the antioxidant activities, acid-neutralizing capacities, inhibition of secretion in gastric acid, and anti-H. pylori action. From these results, we could suggest that MB extract and its constituents, such as honokiol and magnolol, may be useful for the treatment and/or protection of gastritis.

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References

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