• Biomolecules & Therapeutics
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• v.16 no.3
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• pp.270-276
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• 2008

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.

• Korean Journal of Clinical Pharmacy
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• v.7 no.1
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• pp.40-44
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• 1997

Helicobacter pylori(HP) has been implicated as the cause of acute and chronic gastritis, peptic ulcer, and gastric carcinoma. To date the most successful treatment in eradicating HP is known to be the combination of two or more antibiotics with an anti-ulcer drug. In this study, in vitro antimicrobial activity against two was assessed, when proton pump inhibitors (PPIs), omeprazole and lansoprazole, were added to antibiotics at different concentrations. The assays in the absence of PPIs gave minimum inhibitory concentration(MIC) value of 0.63 mg/l for amoxicillin, 4 mg/l for tetracycline, 0.08 mg/l for clarithromycin and 0.16 mg/l for azithromycin. At the concentrations of 125 mg/l, 25 mg/1 and 0.5 mg/l of omeprazole, and the concentrations of 31.25 mg/l, 6.25 mg/l and 1 mg/l of lansoprazole, the MICs of clarithromycin and azithromycin were reduced by $50\%$. Also, lansoprazole at the highest concentration 31.25 mg/l reduced the MIC of amoxicillin by $50\%$, and omeprazole at the highest concentration of 125 mg/l reduced the MIC of tetracycline by $50\%$. In conclusion, the in vitro combination of PPIs and antibiotics led to improvement in the MIC of antibiotics against HP associated gastric disease.

• Korean Journal of Food Science and Technology
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• v.37 no.6
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• pp.970-975
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• 2005

Based on their biological activity, phenols from rosemary extract were evaluated for inhibition of Helicobacter pylori. Contents of total phenolic compounds and inhibition zone of water and ethanol extracts from rosemary were 24.3mg/g and 25.7mg/g, and 11mm, 14mm, and, at $200{\mu}g/mL$ phenol content, 20.9% and 78.2% inhibitory activities were observed, respectively. Electron donating abilities and 2.2-Azino-bis-3-ethylbenzothiazoline-6-sulfonic acid cation radicals of water and ethanol extracts were 89.1% and 62.0% and 98.4% and 96.5%, respectively. Thiobarbituric acid reactive substances values of all extracts were lower than that of control. Ethanol extract showed 98.8% angiotensin-converting enzyme inhibitory activity. Xanthin oxidase inhibitory activities of water and ethanol extracts were very high, at 84.8%, 100%, respectively. These results indicated phenolic compounds from rosemary can be utilize as a potential antioxidant, antimicrobial, anti-hypertension and anti-gout sources.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• v.4 no.1
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• pp.18-27
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• 2001

Purpose: The aims of this study are to investigate the effect of the eradication of H. pylori on histological change of gastric mucosa in children with H. pylori gastritis and to determine whether the histological grading by the Sydney system is valuable in predicting the effect of treatment. Methods: 1) Histological scores by the Sydney system and the endoscopic characteristics were assessed before and at least four weeks after anti-H. pylori therapy in 42 children with H. pylori gastritis. 2) In 32 children treated with omeprazole, amoxicillin and clarithromycin (OAC), pretreatment histological scores and endoscopic findings were compared between the eradicated and the noneradicated to evaluate their predictive value for the successful eradication. Results: 1) In the eradicated (27 cases), nodular gastritis significantly decreased from 89% to 63% (p<0.05). There was an significant improvement in the mean activity score from 2.06 before treatment to 0.24 after treatment (p<0.01). The mean inflammatory score also improved from 2.61 before treatment to 1.89 after treatment (p<0.05). Lymphoid follicles significantly decreased from 48% to 15% (p<0.05). Epithelial damage improved in all 4 cases. But in the noneradicated (15 cases), there was no significant change in the frequency of nodular gastritis, the mean activity score, the mean inflammatory score and the frequency of the lymphoid follicles. 2) In 32 children treated with OAC, there was a tendency that the higher was the pretreatment score of the bacterial density, the lower was the eradication rate of H. pylori (p=0.072). Conclusion: The loss of the polymorphonuclear cell infiltration is the most prominent histological change after successful eradication. There may be negative correlation of the grade of the bacterial density with the success rate of the anti-H. pylori therapy.

• YAKHAK HOEJI
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• v.55 no.2
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• pp.160-167
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• 2011

Cirsium japonicum var. ussuriense (CJ) is used as a folk medicine for diuretic, arthritis, dyspepsia, and bleeding in Korea. Until now, more than fifteen kinds of CJ were identified and among them, Cirsium japonicum var. nakaianum Nakai was selected as experimental material. Both that from The Medical Herb Garden of Seoul National University located at Gayang-dong, Koyang city and native that from a hillock near Dangjin, Chungnam were collected and analyzed to determine whether it is varied in efficacy on their habitats. Extracts and fractions of CJ had a strong effect of antibacterial activity on H. pylori and antioxidant effects. And the CJ from Garden and Dangjin were showed to be more efficient in acute gastritis through the HCl${\cdot}$ethanol-induced gastric lesion test and chronic gastritis through the indomethacin-induced gastric lesion test, respectively. This study proved that the effects of CJ are varied by their habitats. Also, these results suggest that the CJ has potentials for use as functional food and medicine.

• Journal of the Korean Society of Food Science and Nutrition
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• v.35 no.3
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• pp.315-320
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• 2006

For the purpose of developing natural antioxidant, the antioxidative and antimicrobial activities of phenolics isolated from spices were determined. The total phenolics contents of spices were more than 20 mg/g in water and 60% ethanol extracts of all spice, oregano and sage. Electron donating ability assay showed high inhibition rate in water extracts of all spice, nutmeg, white pepper, oregano and sage and 60% ethanol extracts of oregano and nutmeg. Antioxidant protection factor (PF) was higher than 1.2 in 60% ethanol extracts of sage, all spice and oregano and water extracts of sage. The 2,2'-azinobis-3-ethylbenzothiazoline-6-sulfonic acid radical decolorization (ABTS) was inhibited by more than 90% by water and 60% ethanol extracts of all spice and oregano. TBARS (thiobarbituric acid reactive substances) were $0.7{\mu}M$ in the control and $0.2{\mu}M$ in water and 60% ethanol extracts the each spices. The water extracts of each spices did not have antimicrobial activity against H. pylori; however, the 60% ethanol extracts from oregano revealed the high antimicrobial activity as clear zone of 10 mm and inhibition rate of 77.2% with $200{\mu}g/mL$ of phenolics content. The result suggests that spices extract may be useful as potential sources of anti-Helicobacter pylori, antioxidant.

• Archives of Pharmacal Research
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• v.23 no.2
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• pp.172-173
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• 2000

The relationship between the metabolites of glycyrrhizin (18$\beta$-glycyrrhetinic acid-3-O--D-glu-curonopyranosyl-($1{\rightarrow}2$)-$\beta$-D-glucuronide, CL) and their biological activities was investigated. By human intestinal microflora, CL was metabolized to 18$\beta$-glycyrrhetinic acid (GA) as a main product and to 18$\beta$-glycyrrhetinic acid-3-O-$\beta$-D-glucuronide (GAMG) as a minor product. The former reaction was catalyzed by Eubacterium L-8 and the latter was by Streptococcus LJ-22. Among GL and its metabolites, GA and GAMG had more potent in vitro anti-platelet aggregation activity than GL. GA also showed the most potent cytotoxicity against tumor cell lines and the potent inhibitory activity on rotavirus infection as well as growth of Helicobacter pylori. GAMG, the minor metabolite of GL, was the sweetest.

• Journal of Life Science
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• v.30 no.8
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• pp.695-700
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• 2020

The purpose of this study is to evaluate the anti-oxidant and anti-microbial activity of syringin isolated from Cortex Fraxini to investigate their potential for use as safe natural compounds. Purified syringin was dissolved in distilled water for each concentration and used in each experiment. Syringin showed higher 2,2-Diphenyl-1-picrylhydrazyl radical scavenging than butylated hydroxytoluene (BHT) at a concentration of 50 ㎍/ml. In 2,2'-Azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) radical scavenging, activity was similar to that of BHT at all concentrations. In antioxidant protection factor measurement, activity of syringin slightly increased as the concentration increased, as did the inhibitory effect of thiobarbutric acid reactive substances. In evaluating anti-microbial activity, the clear zones of Listeria monocytogenes KCTC 13064, Staphylococcus aureus KCTC 1916, Escherichia coli KCTC 2571, and Helicobacter pylori HPKCTC B0150 at a concentration of 200 ㎍/ml were found to be 17.8 mm, 20.45 mm, 17.05 mm, and 16.8 mm, respectively, but no clear zone was observed in the case of Candida albicans ATCC 10231. The activity against water-soluble antioxidants was therefore superior to that against lipid-soluble antioxidants. Anti-microbial activity was examined by inhibiting growth against gram-positive and -negative strains, and anti-fungal activity was not observed. Based on the results of this study, syringin has possible applications as a natural anti-oxidant and anti-microbial material.

• YAKHAK HOEJI
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• v.49 no.3
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• pp.237-243
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• 2005

Present study was performed for the development of a new supplementary product with gastroprotective effect. The preliminary screening were conducted for the effects of HCl-ethanol-induced gastric lesions in rats. Samples were aloe gel, active hexose correlated compound (AHCC) mentioned that have GI protective property and pulmuone healthy aloe gel (PHAG) that mixture of natural products from Pulmuone company. Aloe gel significantly inhibited HCl-ethanol-induced gastric lesions at the oral dose of 5 ml/kg. AHCC showed the strongest effectiveness at the oral dose of 1,200 mg/kg. PHAG also showed the significant effects at the oral dose of 10, 20 g/kg. In pylorus ligated rats, the treatments of aloe gel, AHCC and PHAG showed decrease in the volume of gastric secretion and acid output. And aloe gel, AHCC and PHAG significantly suppressed the aspirin-induced ulcer and chronic ulcer in pylorus ligated rats. The treatments of aloe gel and PHAG significantly reduced acetic acid-induced ulcer at the oral dose of 5 ml/kg and 10 g/kg for 12 days. In this study; we have found that PHAG had significant improvement in acute gastritis and ulcer at the dose of 20 g/kg and in chronic gastritis and ulcer at the dose of 10 g/kg. Also we evaluated the anti-bacterial activity against H. pylori treated with aloe gel, AHCC and PHAG. PHAG had a equivalent anti bacterial activity with ampicillin against H. pylori at the dose of 1 g/kg.

• Applied Biological Chemistry
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• v.48 no.3
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• pp.258-262
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• 2005

For the purpose of developing natural antioxidant, the antioxidative activity and antimicrobial of phenolics isolated from Baek-bu-ja (Aconiti koreani Rhizoma) were determined. Optimum extracting condition for phenolics were water extracts. HPLC analysis showed that the four major phenolic metabolites were rosemarinic, protocatechuic, caffeic and chlorogenic acids. The water extracts of Baekbuja did not have antimicrobial activity against H. pylori; however, the ethanol extracts revealed higher antimicrobial activity. Electron donation ability on DPPH of Baekbuja ethanol extract was 20% higher than other ethanol extracts. The 2,2'-azinobis-3-ethylbenzothiazoline-6-sulfonic acid radical decolorization (ABTS) and antioxidant protection factor (PF) were determined with extracts from Aconiti koreani Rhizoma. 94% inhibition and 1.14 PF were shown on ABTS and antioxidant protection factor with 60% ethanol extracts. Also, TBARS (thiobarbituric acid reactive substances) showed $0.19\;{\mu}M$ in the control and $0.07\;{\mu}M$ in the 80% ethanol extracts. The result suggests that Baekbuja extract may be useful as potential sources of anti Helicobacter pylori, antioxidant.