Helicobacter pylori infection and atherosclerosis: is there a causal relationship?

Area of Science:

• Cardiovascular Science
• Infectious Disease Epidemiology

Background:

• The coexistence of Helicobacter pylori (H. pylori) infection and atherosclerotic diseases has long suggested a causal link.
• Observed declines in both duodenal ulcer and coronary artery disease epidemics, along with H. pylori detection in plaques, fueled this hypothesis.

Purpose of the Study:

• To critically assess the existing evidence for and against a causal relationship between H. pylori infection and atherosclerosis.
• To clarify the nature of the association between H. pylori and cardiovascular health.

Main Methods:

• Systematic review of epidemiological and clinical studies.
• Analysis of proposed biological mechanisms linking H. pylori to atherosclerosis.
• Evaluation of confounding factors and shared risk factors.

Main Results:

• While some studies suggest H. pylori may contribute through inflammation and dyslipidemia, others refute a direct causal link.
• Evidence indicates shared risk factors like aging, smoking, socioeconomic status, and diet are more likely responsible for the observed coexistence.
• No definitive proof establishes H. pylori eradication as a strategy for atherosclerosis prevention or treatment.

Conclusions:

• The current evidence does not support a direct causal relationship between H. pylori infection and atherosclerosis.
• The association is likely explained by common underlying risk factors.
• Further research is needed to fully elucidate the complex interplay, but H. pylori eradication is not currently indicated for atherosclerosis management.