Early matrix metalloproteinase-12 inhibition worsens post-myocardial infarction cardiac dysfunction by delaying inflammation resolution

Rugmani Padmanabhan Iyer, Nicolle L. Patterson, Fouad A. Zouein, Yonggang Ma, Vincent Dive, Lisandra E. De Castro Brás, Merry L Lindsey

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Rationale Matrix metalloproteinases (MMPs) regulate remodeling of the left ventricle (LV) post-myocardial infarction (MI). MMP-12 has potent macrophage-dependent remodeling properties in the atherosclerotic plaque; however, post-MI roles have not been examined. Objective The goal was to determine MMP-12 post-MI mechanisms. Methods and results Male C57BL/6J mice (3-6 months old) were subjected to left coronary artery ligation. Saline or the RXP 470.1 MMP-12 inhibitor (MMP-12i; 0.5 mg/kg/day) was delivered by osmotic mini-pump beginning 3 h post-MI, and mice were sacrificed at day (d)1, 3, 5 or 7 post-MI and compared to d0 controls (mice without MI; n = 6-12/group/time). MMP-12 expression increased early post-MI, and contrary to expected, neutrophils were a surprising early cellular source for MMP-12. MMP-12i reduced MMP-12 activity 33 ± 1% at d1 post-MI. Despite similar infarct areas and survival rates, MMP-12i led to greater LV dilation and worsened LV function. At d7 post-MI, MMP-12i prolonged pro-inflammatory cytokine upregulation (IL1r1, IL6ra, IL11, and Cxcr5) and decreased CD44 (both gene and protein levels). Hyaluronan (HA), a CD44 ligand, was elevated at d1 and d7 post-MI with MMP12i, as a result of decreased fragmentation. Because CD44-HA regulates neutrophil removal, apoptosis markers were evaluated. Caspase 3 increased, while cleaved caspase 3 levels decreased in MMP-12i group at d7 post-MI, indicating reduced neutrophil apoptosis. In isolated neutrophils, active MMP-12 directly stimulated CD44, caspase 3, and caspase 8 expression. Conclusion Our results reveal a novel protective mechanism for MMP-12 in neutrophil biology. Post-MI, MMP-12i impaired CD44-HA interactions to suppress neutrophil apoptosis and prolong inflammation, which worsened LV function.

Original languageEnglish (US)
Pages (from-to)198-208
Number of pages11
JournalInternational Journal of Cardiology
Volume185
DOIs
StatePublished - Apr 15 2015
Externally publishedYes

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Matrix Metalloproteinase 12
Myocardial Infarction
Inflammation
Matrix Metalloproteinases
Neutrophils
Hyaluronic Acid
Caspase 3
Heart Ventricles
Apoptosis
Interleukin-11
Ventricular Remodeling
Matrix Metalloproteinase Inhibitors
Caspase 8
Atherosclerotic Plaques
Inbred C57BL Mouse

Keywords

  • Apoptosis
  • CD44
  • LV remodeling
  • MMP-12
  • Neutrophil
  • Proteomics

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

Cite this

Early matrix metalloproteinase-12 inhibition worsens post-myocardial infarction cardiac dysfunction by delaying inflammation resolution. / Iyer, Rugmani Padmanabhan; Patterson, Nicolle L.; Zouein, Fouad A.; Ma, Yonggang; Dive, Vincent; De Castro Brás, Lisandra E.; Lindsey, Merry L.

In: International Journal of Cardiology, Vol. 185, 15.04.2015, p. 198-208.

Research output: Contribution to journalArticle

Iyer, Rugmani Padmanabhan ; Patterson, Nicolle L. ; Zouein, Fouad A. ; Ma, Yonggang ; Dive, Vincent ; De Castro Brás, Lisandra E. ; Lindsey, Merry L. / Early matrix metalloproteinase-12 inhibition worsens post-myocardial infarction cardiac dysfunction by delaying inflammation resolution. In: International Journal of Cardiology. 2015 ; Vol. 185. pp. 198-208.
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AU - Iyer, Rugmani Padmanabhan

AU - Patterson, Nicolle L.

AU - Zouein, Fouad A.

AU - Ma, Yonggang

AU - Dive, Vincent

AU - De Castro Brás, Lisandra E.

AU - Lindsey, Merry L

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N2 - Rationale Matrix metalloproteinases (MMPs) regulate remodeling of the left ventricle (LV) post-myocardial infarction (MI). MMP-12 has potent macrophage-dependent remodeling properties in the atherosclerotic plaque; however, post-MI roles have not been examined. Objective The goal was to determine MMP-12 post-MI mechanisms. Methods and results Male C57BL/6J mice (3-6 months old) were subjected to left coronary artery ligation. Saline or the RXP 470.1 MMP-12 inhibitor (MMP-12i; 0.5 mg/kg/day) was delivered by osmotic mini-pump beginning 3 h post-MI, and mice were sacrificed at day (d)1, 3, 5 or 7 post-MI and compared to d0 controls (mice without MI; n = 6-12/group/time). MMP-12 expression increased early post-MI, and contrary to expected, neutrophils were a surprising early cellular source for MMP-12. MMP-12i reduced MMP-12 activity 33 ± 1% at d1 post-MI. Despite similar infarct areas and survival rates, MMP-12i led to greater LV dilation and worsened LV function. At d7 post-MI, MMP-12i prolonged pro-inflammatory cytokine upregulation (IL1r1, IL6ra, IL11, and Cxcr5) and decreased CD44 (both gene and protein levels). Hyaluronan (HA), a CD44 ligand, was elevated at d1 and d7 post-MI with MMP12i, as a result of decreased fragmentation. Because CD44-HA regulates neutrophil removal, apoptosis markers were evaluated. Caspase 3 increased, while cleaved caspase 3 levels decreased in MMP-12i group at d7 post-MI, indicating reduced neutrophil apoptosis. In isolated neutrophils, active MMP-12 directly stimulated CD44, caspase 3, and caspase 8 expression. Conclusion Our results reveal a novel protective mechanism for MMP-12 in neutrophil biology. Post-MI, MMP-12i impaired CD44-HA interactions to suppress neutrophil apoptosis and prolong inflammation, which worsened LV function.

AB - Rationale Matrix metalloproteinases (MMPs) regulate remodeling of the left ventricle (LV) post-myocardial infarction (MI). MMP-12 has potent macrophage-dependent remodeling properties in the atherosclerotic plaque; however, post-MI roles have not been examined. Objective The goal was to determine MMP-12 post-MI mechanisms. Methods and results Male C57BL/6J mice (3-6 months old) were subjected to left coronary artery ligation. Saline or the RXP 470.1 MMP-12 inhibitor (MMP-12i; 0.5 mg/kg/day) was delivered by osmotic mini-pump beginning 3 h post-MI, and mice were sacrificed at day (d)1, 3, 5 or 7 post-MI and compared to d0 controls (mice without MI; n = 6-12/group/time). MMP-12 expression increased early post-MI, and contrary to expected, neutrophils were a surprising early cellular source for MMP-12. MMP-12i reduced MMP-12 activity 33 ± 1% at d1 post-MI. Despite similar infarct areas and survival rates, MMP-12i led to greater LV dilation and worsened LV function. At d7 post-MI, MMP-12i prolonged pro-inflammatory cytokine upregulation (IL1r1, IL6ra, IL11, and Cxcr5) and decreased CD44 (both gene and protein levels). Hyaluronan (HA), a CD44 ligand, was elevated at d1 and d7 post-MI with MMP12i, as a result of decreased fragmentation. Because CD44-HA regulates neutrophil removal, apoptosis markers were evaluated. Caspase 3 increased, while cleaved caspase 3 levels decreased in MMP-12i group at d7 post-MI, indicating reduced neutrophil apoptosis. In isolated neutrophils, active MMP-12 directly stimulated CD44, caspase 3, and caspase 8 expression. Conclusion Our results reveal a novel protective mechanism for MMP-12 in neutrophil biology. Post-MI, MMP-12i impaired CD44-HA interactions to suppress neutrophil apoptosis and prolong inflammation, which worsened LV function.

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