Helicobacter pylori and Cancer: What's the Link?

Area of Science:

• Microbiology
• Oncology
• Gastroenterology

Background:

• Helicobacter pylori (H. pylori) is a common bacterial pathogen causing chronic infection worldwide.
• Classified as a Group I carcinogen, H. pylori is strongly linked to gastric cancer, though mechanisms are complex.
• Virulence factors like CagA and VacA contribute to a pro-tumorigenic environment, amplified by host microRNAs.

Purpose of the Study:

• To review the multifaceted pathways linking H. pylori to gastric carcinogenesis.
• To integrate molecular insights, epidemiological trends, and clinical data on H. pylori's role in cancer.
• To explore H. pylori's impact on cancer prevention, treatment, and immunotherapy outcomes.

Main Methods:

• Narrative review synthesizing existing literature.
• Analysis of molecular mechanisms, including bacterial virulence factors and host responses.
• Integration of epidemiological data and clinical findings.

Main Results:

• H. pylori infection leads to chronic gastric inflammation, a key step in carcinogenesis.
• Bacterial virulence factors and host microRNAs modulate cellular processes, promoting tumor development.
• Antibiotic resistance and host factors challenge H. pylori eradication, impacting cancer risk reduction.

Conclusions:

• H. pylori significantly contributes to gastric cancer through complex molecular and cellular pathways.
• Advances in multi-omics profiling offer potential for targeted prevention strategies.
• H. pylori's influence extends to immunotherapy outcomes, highlighting its broad relevance in cancer management.