Helicobacter pylori Abstracts 1

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The effect of mastic gum on Helicobacter pylori: a randomized pilot study
            (Dabos et al., 2009) Download
Our aim was to study the effect of pure mastic gum on Helicobacter pylori (H. pylori) eradication in patients suffering from an H. pylori infection Fifty two patients were randomized to receive either 350mg three times a day (tid) of pure mastic gum for 14 days (Group A), or 1,05g tid of pure mastic gum (Group B) for 14 days, or pantoprazole 20mg twice a day (bd) plus pure mastic gum 350mg tid for 14 days (Group C) or pantoprazole 20mg bd plus amoxicillin 1g bd plus clarithromycin 500mg bd for 10 days (Group D). All patients harboured H. pylori before entering the study and that was confirmed by a (13)C urea breath test (UBT). H. pylori eradication was tested by a UBT 5 weeks after completion of the eradication regime. Eradication of H. pylori was confirmed in 4/13 patients in Group A and in 5/13 in Grour B. No patient in Group C achieved eradication whereas 10/13 patients in Group D had a negative UBT. There were no statistically significant differences in mean UBT values in Groups A, B, C although there was a trend in Group A (p=0.08) and in Group B (p=0.064). The difference was significant in Group D (p=0.01). All patients tolerated mastic gum well and no serious adverse events were reported. Mastic gum has bactericidal activity on H. pylori in vivo.

Systematic review: are probiotics useful in controlling gastric colonization by Helicobacter pylori
            (Gotteland et al., 2006) Download
Helicobacter pylori is a highly prevalent pathogen considered as an aetiological factor for gastroduodenal ulcers, and a risk factor for gastric adenocarcinoma and lymphoma in humans. Most subjects colonized by this micro-organism are asymptomatic and remain untreated. In symptomatic patients, the antibiotic treatment has a high cost and is not 100% effective because of resistance to antibiotics and to moderate patient compliance. This review discusses the role of probiotics as alternative solutions to assist in the control of H. pylori colonization in at-risk populations. The evidence that some strains of Lactobacillus and Bifidobacterium are able to inhibit H. pylori growth through the release of bacteriocins or organic acids, and may also decrease its adhesion to epithelial cells, is reviewed. In addition, probiotics have a possible role in the stabilization of the gastric barrier function and the decrease of mucosal inflammation. Other aspects that are considered are the contribution of probiotics to the healing of the gastric mucosa linked to their antioxidant and anti-inflammatory properties. Clinical trials in colonized adults and children are reviewed, and suggest that probiotics do not eradicate H. pylori but maintain lower levels of this pathogen in the stomach; in combination with antibiotics, probiotics may increase eradication rate and/or decrease adverse effects. Papers suggesting similar effects on H. pylori by foodstuffs such as berry juice and some milk proteins are quoted. Regular intake of these and other dietary products might constitute a low-cost, large-scale alternative solution applicable for populations at-risk for H. pylori colonization.

Steroid hormones as bactericidal agents to Helicobacter pylori
            (Hosoda et al., 2011) Download
Helicobacter pylori is a unique bacterial species that assimilates various steroids as membrane lipid components. Our group has recently found, however, that certain steroids may impair the viability of H. pylori. In this study, we go on to reveal that estradiol, androstenedione, and progesterone (PS) all have the potential to inhibit the growth of H. pylori. Of these three steroid hormones, progesterone demonstrated the most effective anti-H. pylori action. 17alpha-hydroxyprogesterone caproate (17alphaPSCE), a synthetic progesterone derivative, had a much stronger anti-H. pylori action than progesterone, whereas 17alpha-hydroxyprogesterone, a natural progesterone derivative, completely failed to inhibit the growth of the organism. Progesterone and 17alphaPSCE were both found to kill H. pylori through their bacteriolytic action. Among five bacterial species investigated, H. pylori was the only species susceptible to the bactericidal action of progesterone and 17alphaPSCE. The other four species, Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, and Staphylococcus epiderimidis, all resisted this action. Progesterone and free-cholesterol (FC) obstructed each other's effects against the H. pylori cell. Taken in sum, these results suggest that progesterone and FC may bind to the identical region on the H. pylori cell surface. We expect these findings to contribute to the development of a novel anti-H. pylori steroidal agent.

Mastic gum kills Helicobacter pylori
            (Huwez et al., 1998) Download
To the Editor: Even low doses of mastic gum — 1 mg per day for two weeks — can cure peptic ulcers very rapidly, but the mechanism responsible has not been clear. We have found that mastic is active against Helicobacter pylori, which could explain its therapeutic effect in patients with peptic ulcers.

Inhibition of Helicobacter pylori and associated urease by oregano and cranberry phytochemical synergies.
            (Lin et al., 2005) Download
Ulcer-associated dyspepsia is caused by infection with Helicobacter pylori. H. pylori is linked to a majority of peptic ulcers. Antibiotic treatment does not always inhibit or kill H. pylori with potential for antibiotic resistance. The objective of this study was to determine the potential for using phenolic phytochemical extracts to inhibit H. pylori in a laboratory medium. Our approach involved the development of a specific phenolic profile with optimization of different ratios of extract mixtures from oregano and cranberry. Subsequently, antimicrobial activity and antimicrobial-linked urease inhibition ability were evaluated. The results indicated that the antimicrobial activity was greater in extract mixtures than in individual extracts of each species. The results also indicate that the synergistic contribution of oregano and cranberry phenolics may be more important for inhibition than any species-specific phenolic concentration. Further, based on plate assay, the likely mode of action may be through urease inhibition and disruption of energy production by inhibition of proline dehydrogenase at the plasma membrane.

Chemical Composition of the Essential Oil of Mastic Gum and their Antibacterial Activity Against Drug-Resistant Helicobacter pylori.
            (Miyamoto et al., 2014) Download
ABSTRACT:  Mastic gum is derived from the tree named Pistacia lentiscus that is grown only in Island Hios of Greek. Since Mastic was first reported to kill Helicobacter pylori (H. pylori) in 1998, there has been no further study to elucidate which component of mastic specifically shows the antimicrobial activity against H. pylori. In this study, we examined which component of mastic gum was responsible for anti-H. pylori activity. We prepared the essential oil of mastic gum and identified 20 constituents by GC-MS analysis. Ten standard components were assayed for anti-H. pylori activity, and it clarified that α-terpineol and (E)-methyl isoeugenol showed the anti-H. pylori activity against four different H. pylori strains that were established from patients with gastritis, gastric ulcer and gastric cancer. These components could be useful to overcome the drug-resistance H. pylori growth in stomach.


 

Effect of licorice versus bismuth on eradication of Helicobacter pylori in patients with peptic ulcer disease.
            (Momeni et al., 2014) Download
BACKGROUND:  Different therapeutic regimens were used for eradication of Helicobacter pylori, based on the cost, effectiveness and patient's compliance. The aim of this study was the evaluation of licorice compared with bismuth in quadruple regimen on eradication of H. pylori in patients with peptic ulcer disease (PUD). MATERIALS AND METHODS:  In a double-blind clinical trial study, 60 patients with PUD and positive rapid urease test were enrolled. The patients were randomly allocated into two equal groups. In first group, licorice, amoxicillin, metronidazole and omeprazole and in the second (control) group, bismuth subsalicylate, amoxicillin, metronidazole and omeprazole were prescribed respectively, and 4 weeks after treatment, in order to evaluate H. pylori eradication, urea breath test was done in all patients. The outcome of the study was the preference usage of licorice as an effective medication for H. pylori eradication. RESULTS:  Mean age of the patients in the control and case groups were 40.8 ± 15.5 and 42.2 ± 15.8 years, respectively (P = 0.726). Seventeen (56.7%) patients in control group and 16 (53.3%) in the case group were female (P = 0.795). Both groups were similar based on frequency of gastric or duodenal ulcer. Response to treatment were seen in 20 (67%) and 17 (57%) patients of case and control groups, respectively (P > 0.05). CONCLUSION:  Our study showed that licorice is as effective as bismuth in H. pylori eradication; therefore, in patients whom bismuth is contraindicated, licorice can be used safely instead.


 

References

Dabos, K. J., et al. (2009), ‘The effect of mastic gum on Helicobacter pylori: a randomized pilot study’, Phytomedicine, 17 (3-4), 296-99. PubMedID: 19879118
Gotteland, M, O Brunser, and S Cruchet (2006), ‘Systematic review: are probiotics useful in controlling gastric colonization by Helicobacter pylori’, Aliment Pharmacol Ther, 23 (8), 1077-86. PubMedID: 16611267
Hosoda, K., et al. (2011), ‘Steroid hormones as bactericidal agents to Helicobacter pylori’, FEMS Microbiol Lett, 318 (1), 68-75. PubMedID: 21306429
Huwez, F. U., et al. (1998), ‘Mastic gum kills Helicobacter pylori’, N Engl J Med, 339 (26), 1946. PubMedID: 9874617
Lin, YT, et al. (2005), ‘Inhibition of Helicobacter pylori and associated urease by oregano and cranberry phytochemical synergies.’, Appl Environ Microbiol, 71 (12), 8558-64. PubMedID: 16332847
Miyamoto, T, T Okimoto, and M Kuwano (2014), ‘Chemical Composition of the Essential Oil of Mastic Gum and their Antibacterial Activity Against Drug-Resistant Helicobacter pylori.’, Nat Prod Bioprospect, 4 227-31. PubMedID: 25089241
Momeni, A, et al. (2014), ‘Effect of licorice versus bismuth on eradication of Helicobacter pylori in patients with peptic ulcer disease.’, Pharmacognosy Res, 6 (4), 341-44. PubMedID: 25276073