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Gut Bacteria-Not for the Faint of Heart

Noa Mandelbaum1, Tal Gefen1, Naama Geva-Zatorsky2

  • 1Department of Cell Biology and Cancer Science, Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, Technion Integrated Cancer Center (TICC), Haifa, Israel.

Cell Host & Microbe
|January 18, 2020
PubMed

Insights

Gut bacteria can trigger heart inflammation through a cross-immune response. This study reveals how a common gut microbe species leads to cardiomyopathy in mice and is linked to heart conditions in patients.

Area of Science:

  • Microbiology
  • Immunology
  • Cardiology

Background:

  • The connection between gut microbiota and heart inflammation has been unclear.
  • Previous research has not fully elucidated the mechanisms linking gut bacteria to cardiac complications.

Purpose of the Study:

  • To investigate the role of commensal gut bacteria in the development of heart inflammation.
  • To identify specific bacterial species and mechanisms involved in cardiac pathology.

Main Methods:

  • Utilized a mouse model to study the effects of commensal bacteria on heart tissue.
  • Employed immunological assays to analyze cross-immune responses.
  • Correlated findings in mice with patient data to assess clinical relevance.

Main Results:

  • Identified a specific commensal Bacteroides species that induces a cross-immune response.
  • Demonstrated that this response targets both a bacterial protein and a heart epitope.
  • Showcased the induction of cardiomyopathy in mice due to this mechanism.
  • Found correlative evidence linking this bacterial species to heart inflammation in human patients.

Conclusions:

  • Commensal gut bacteria can mechanistically drive heart inflammation and cardiomyopathy.
  • A cross-immune response, initiated by gut microbes, is a key factor in cardiac pathology.
  • Findings provide a direct link between gut bacteria and heart disease in both preclinical models and humans.

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