Impact of Diet on Helicobacter pylori Treatment Success
Overview of Helicobacter pylori
Helicobacter pylori is a significant global health concern linked to conditions such as gastritis and gastric ulcers. Approximately 50% of the world’s population is affected by this infection, which can lead to chronic gastrointestinal diseases. In severe instances, it may elevate the risk of gastric adenocarcinoma.
Treatment Approaches in Japan
In Japan, the standard treatment regimen includes a triple-drug therapy comprising two antibiotics and a proton pump inhibitor. However, the effectiveness of this eradication therapy has seen a decline over the past two decades, with only 70% of patients achieving successful treatment outcomes. The reasons for this downturn remain unclear but are thought to include factors such as antibiotic resistance, smoking, and alcohol consumption. Additionally, the role of various nutrients in influencing treatment success has been minimally explored.
Recent Research Findings
A recent observational study conducted in Japan and published in the American Journal of Clinical Nutrition examined the impact of dietary intake on Helicobacter pylori eradication therapy. The study involved 352 Japanese patients, aged between 30 and 79 years, who were diagnosed with Helicobacter pylori and underwent a week-long triple-drug therapy (lansoprazole, amoxicillin, and clarithromycin). All participants tested positive for the 13C-urea breath test (UBT), with 19% also showing signs of gastritis or duodenal ulcers. A follow-up UBT eight weeks later determined the success of the treatment.
Study Results
The overall success rate for the eradication therapy was found to be only 60.2%. Factors that negatively impacted treatment success included older age, elevated levels of CRP (a marker of inflammation), and higher daily intakes of iron, vitamin D, omega-3 highly unsaturated fatty acids (omega-3 HUFAs), and cholesterol. Notably, cholesterol had the most significant adverse effect on treatment efficacy. Increased consumption of fish and eggs was also correlated with lower success rates.
Interestingly, there were observed correlations between higher fish intake and increased levels of vitamin D and omega-3 HUFAs, as well as between higher egg consumption and elevated cholesterol levels.
Cholesterol’s Role in Treatment Resistance
The detrimental impact of cholesterol on treatment success aligns with previous knowledge, as Helicobacter pylori utilizes cholesterol to bolster its antibiotic resistance and enhance its virulence. Nonetheless, further investigation is necessary to clarify the specific roles of omega-3 HUFAs and vitamin D in eradication therapy, particularly as both have demonstrated anti-Helicobacter pylori effects and are generally recommended by health professionals.
Conclusion and Future Research Directions
While the study indicates a connection between nutrient intake and the success of Helicobacter pylori eradication therapy, additional research is essential to validate and comprehend these findings. Given that the study’s cohort was limited to one ethnic group, the applicability of the results to broader populations remains uncertain. Furthermore, dietary assessments were based on self-reported questionnaires, which could introduce reporting bias that might dilute the identified associations.
Overall, the research suggests that increased intake of omega-3 fatty acids, iron, and cholesterol is linked to lower success rates in treatment for Helicobacter pylori.
Reference
Ikezaki H, Furusyo N, Jaques PF, et al. Higher dietary cholesterol and ω-3 fatty acid intakes are associated with a lower success rate of Helicobacter pylori eradication therapy in Japan. Am J Clin Nutr. 2017;106:581-588. Available from: doi.org: 10.3945/ajcn.116.144873.