Skip to Main content Skip to Navigation
Journal articles

TREM-1 Mediates Inflammatory Injury and Cardiac Remodeling Following Myocardial Infarction

Abstract : Rationale: Optimal outcome after myocardial infarction (MI) depends on a coordinated healing response in which both debris removal and repair of the myocardial extracellular matrix play a major role. However, adverse remodeling and excessive inflammation can promote heart failure, positioning leucocytes as central protagonists and potential therapeutic targets in tissue repair and wound healing after MI. Objective: In this study, we examined the role of triggering receptor expressed on myeloid cells-1(TREM-1) in orchestrating the inflammatory response that follows MI. TREM-1, expressed by neutrophils and mature monocytes, is an amplifier of the innate immune response. Methods and Results: After infarction, TREM-1 expression is upregulated in ischemic myocardium in mice and humans. Trem-1 genetic invalidation or pharmacological inhibition using a synthetic peptide (LR12) dampens myocardial inflammation, limits neutrophils recruitment and monocyte chemoattractant protein-1 production, thus reducing classical monocytes mobilization to the heart. It also improves left ventricular function and survival in mice (n=20-22 per group). During both permanent and transient myocardial ischemia, Trem-1 blockade also ameliorates cardiac function and limits ventricular remodeling as assessed by fluorodeoxyglucose-positron emission tomographic imaging and conductance catheter studies (n=9-18 per group). The soluble form of TREM1 (sTREM-1), a marker of TREM-1 activation, is detectable in the plasma of patients having an acute MI (n=1015), and its concentration is an independent predictor of death. Conclusions: These data suggest that TREM-1 could constitute a new therapeutic target during acute MI.
Document type :
Journal articles
Complete list of metadatas

https://hal.archives-ouvertes.fr/hal-01514439
Contributor : Gestionnaire Hal-Upmc <>
Submitted on : Wednesday, April 26, 2017 - 11:47:01 AM
Last modification on : Thursday, April 9, 2020 - 11:53:02 AM

Identifiers

Citation

Amir Boufenzer, Jeremie Lemarie, Tabassome Simon, Marc Derive, Youcef Bouazza, et al.. TREM-1 Mediates Inflammatory Injury and Cardiac Remodeling Following Myocardial Infarction. Circulation Research, American Heart Association, 2015, 116 (11), pp.1772+. ⟨10.1161/CIRCRESAHA.116.305628⟩. ⟨hal-01514439⟩

Share

Metrics

Record views

340