Related Experiment Video
Updated: Feb 28, 2026
05:23
Gastric Mucosa Quantitative Polymerase Chain Reaction Analysis for Detecting Helicobacter pylori and Antibiotic Resistance
Published on: March 7, 2025
868
Genetic Susceptibility to Helicobacter pylori Infection and Pancreatic Cancer Risk: A Two-Sample Mendelian
Nien-Yu Yang1, Te-Min Ke2, Yicong Huang1
1Division of Population Health, Health Services Research and Primary Care, School of Health Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester M13 9PT, UK.
Life (Basel, Switzerland)
|February 27, 2026
Summary
This study found no evidence that Helicobacter pylori (H. pylori) infection causally increases pancreatic cancer risk. Further research with improved exposure measures is needed to confirm these findings on H. pylori and pancreatic cancer.
Area of Science:
- Gastroenterology
- Oncology
- Epidemiology
Background:
- Pancreatic cancer is a highly lethal malignancy with limited known modifiable risk factors.
- Helicobacter pylori (H. pylori) infection is a cause of gastric cancer, but its role in pancreatic cancer is uncertain.
- Observational studies on H. pylori and pancreatic cancer have yielded inconsistent results.
Purpose of the Study:
- To investigate the potential causal effect of H. pylori infection on pancreatic cancer risk.
- Utilizing a robust two-sample Mendelian randomization (2SMR) approach to overcome limitations of observational studies.
- To provide reliable evidence regarding the association between H. pylori and pancreatic cancer.
Main Methods:
- Two-sample Mendelian randomization (2SMR) analysis.
- Genetic instruments for H. pylori infection derived from GWAS of anti-H. pylori IgG levels.
- Pancreatic cancer outcomes analyzed using large datasets including UK Biobank, FinnGen, and MVP.
Main Results:
- No statistically significant causal association was found between H. pylori infection and pancreatic cancer risk.
- Primary analysis (IVW) showed no increased risk (ORs 1.039 and 1.077).
- Sensitivity analyses confirmed null findings and lack of significant pleiotropy.
Conclusions:
- This 2SMR study provides no evidence that H. pylori infection causally increases pancreatic cancer risk.
- The findings suggest H. pylori is unlikely to be a direct cause of pancreatic cancer.
- Larger studies with refined exposure measurements are recommended for further investigation.
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