Lab Anim Res.  2014 Mar;30(1):28-34.

In vitro and in vivo anti-Helicobacter pylori activities of FEMY-R7 composed of fucoidan and evening primrose extract

Affiliations
  • 1College of Veterinary Medicine, Chungbuk National University, Cheongju, Korea. solar93@cbu.ac.kr
  • 2Misuba RTech Co., Ltd., Asan, Korea.
  • 3Department of Biomedical Laboratory Sciences, Yonsei University, Wonju, Korea. kimjb70@yonsei.ac.kr

Abstract

Effects of FEMY-R7, composed of fucoidan and evening primrose extract, on the bacterial growth and intragastric infection of Helicobacter pylori as well as gastric secretion were investigated in comparison with a proton-pump inhibitor pantoprazole. For in vitro anti-bacterial activity test, H. pylori (1x10(8) CFU/mL) was incubated with a serially-diluted FEMY-R7 for 3 days. As a result, FEMY-R7 fully inhibited the bacterial growth at 100 microg/mL, which was determined to be a minimal inhibitory concentration. In addition, 6-hour incubation with H. pylori, FEMY-R7 inhibited urease activity in a concentration-dependent manner, showing a median inhibitory concentration of 1,500 microg/mL. In vivo elimination study, male C57BL/6 mice were infected with the bacteria by intragastric inoculation (5x10(9) CFU/mouse) 3 times at 2-day intervals, and simultaneously, orally treated twice a day with 10, 30 or 100 mg/kg FEMY-R7 for 7 days. In Campylobcter-like organism-detection test and bacterial identification, FEMY-R7 exerted a high bacteria-eliminating capacity at 30-100 mg/kg, comparably to 30 mg/kg pantoprazole. In contrast to a strong antacid activity of pantoprazole in a pylorus-ligation study, FEMY-R7 did not significantly affect gastric pH, free HCl, and total acidity, although it significantly decreased fluid volume at a low dose (10 mg/kg). The results indicate that FEMY-R7 eliminate H. pylori from gastric mucosa by directly killing the bacteria and preventing their adhesion and invasion, rather than by inhibiting gastric secretion or mucosal damage.

Keyword

Helicobacter pylori; FEMY-R7; fucoidan; evening primrose extract; minimal inhibitory concentration (MIC); CLO test; gastric secretion

MeSH Terms

Animals
Bacteria
Gastric Mucosa
Helicobacter pylori
Homicide
Humans
Hydrogen-Ion Concentration
Male
Mice
Oenothera biennis*
Urease
Urease

Figure

  • Figure 1 Representative inhibition of H. pylori growth by FEMY-R7 in Agar-dilution assay. Minimal inhibitory concentration (MIC) was determined to be 100 µg/mL. A, normal culture; B, vehicle (1% DMSO); C, 30 µg/mL FEMY-R7; D, 100 µg/mL FEMY-R7.

  • Figure 2 Inhibition of H. pylori urease by FEMY-R7. Median inhibitory concentration (IC50) was determined to be 1,500 µg/mL.

  • Figure 3 Elimination of H. pylori from gastric mucosa by FEMY-R7. A, vehicle control; B, 30 mg/kg FEMY-R7; C, 100 mg/kg FEMY-R7; D, 30 mg/kg pantoprazole.


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