Microbiota-derived peptide mimics drive lethal inflammatory cardiomyopathy

Author:

Gil-Cruz Cristina1ORCID,Perez-Shibayama Christian1,De Martin Angelina1,Ronchi Francesca2,van der Borght Katrien3,Niederer Rebekka1,Onder Lucas1,Lütge Mechthild1ORCID,Novkovic Mario1ORCID,Nindl Veronika1,Ramos Gustavo45ORCID,Arnoldini Markus6,Slack Emma M.C.6ORCID,Boivin-Jahns Valérie57ORCID,Jahns Roland58ORCID,Wyss Madeleine9,Mooser Catherine2,Lambrecht Bart N.3,Maeder Micha T.10,Rickli Hans10,Flatz Lukas1,Eriksson Urs1112,Geuking Markus B.13ORCID,McCoy Kathy D.9ORCID,Ludewig Burkhard1ORCID

Affiliation:

1. Institute of Immunobiology, Kantonsspital St. Gallen, St. Gallen, Switzerland.

2. Maurice Müller Laboratories, Department of Biomedical Research, Universitätsklinik für Viszerale Chirurgie und Medizin Inselspital, University of Berne, Berne, Switzerland.

3. VIB Center for Inflammation Research, Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium.

4. Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany.

5. Comprehensive Heart Failure Center, University Hospital of Würzburg, Würzburg, Germany.

6. Institute of Food, Nutrition and Health, ETH, Zurich, Switzerland.

7. Institute of Pharmacology and Toxicology, University of Würzburg, Würzburg, Germany.

8. Interdisciplinary Bank of Biomaterials and Data Würzburg (IBDW), University Hospital of Würzburg, Würzburg, Germany.

9. Department of Physiology and Pharmacology, Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.

10. Cardiology Division, Kantonsspital St. Gallen, St. Gallen, Switzerland.

11. Center for Molecular Cardiology University of Zurich, Zurich, Switzerland.

12. Department of Medicine, GZO Regional Health Center, Wetzikon, Switzerland.

13. Department of Microbiology, Immunology and Infectious Diseases, Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.

Abstract

Peptide mimicry breaks the heart Myocarditis, a prolonged chronic inflammation of heart muscle, can eventually progress to inflammatory cardiomyopathy, a serious condition associated with heart failure. Activated T helper (T H ) cells that recognize myosin heavy chain 6–derived peptides are thought to play a central role in this pathogenesis. Using a mouse model of myocarditis, Gil-Cruz et al. found that cardiac myosin–reactive T H cells are initially primed by myosin-peptide mimics derived from commensal Bacteroides species in the gut (see the Perspective by Epelman). Unlike heathy controls, human myocarditis patients also showed detectable immune reactivity to both Bacteroides and cardiac myosin antigens. Treatment with antibiotics dampened inflammatory responses and prevented lethal heart disease. Science , this issue p. 881 ; see also p. 806

Funder

Swiss National Science Foundation

Bundesministerium für Bildung und Forschung

Interdisciplinary Centre for Clinical Research, Universität of Würzburg, Germany

Interdisciplinary Centre for Clinical Research

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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