Angiotensin-converting enzyme inhibition reduces monocyte chemoattractant protein-1 and tissue factor levels in patients with myocardial infarction

J Am Coll Cardiol. 1999 Oct;34(4):983-8. doi: 10.1016/s0735-1097(99)00318-6.

Abstract

Objectives: We investigated the effects of enalapril therapy on plasma tissue factor (TF), tissue factor pathway inhibitor (TFPI) and monocyte chemoattractant protein-1 (MCP-1) levels in patients with acute myocardial infarction.

Background: Macrophages express TF in human coronary atherosclerotic plaques. Both TF and TFPI are major regulators of coagulation and thrombosis. Monocyte chemoattractant protein-1 is a monocyte and macrophage chemotactic and activating factor.

Methods: In a randomized, double-blind, placebo-controlled study beginning about two weeks after myocardial infarction, 16 patients received four weeks of placebo (placebo group) and another 16 patients received four weeks of enalapril 5 mg daily therapy (enalapril group). We performed blood sampling after administration of the doses.

Results: There were no significant differences in the serum angiotensin-converting enzyme (ACE) activity, plasma TF, free TFPI or MCP-1 levels before administration between the enalapril and placebo groups. In the enalapril group, ACE activity (IU/liter) (14.0 before, 5.2 on day 3, 5.8 on day 7, 6.3 on day 28), TF levels (pg/ml) (223, 203, 182, 178) and MCP-1 levels (pg/ml) (919, 789, 790, 803) significantly decreased by day 28. However, the free TFPI levels (ng/ml) (28.2, 26.5, 26.8, 28.4) did not change. These four variables were unchanged during the study period in the placebo group.

Conclusions: This study demonstrated that administration of enalapril reduces the increased procoagulant activity in patients with myocardial infarction associated with inhibition of the activation and accumulation of macrophages and monocytes.

Publication types

  • Clinical Trial
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Aged, 80 and over
  • Angiotensin-Converting Enzyme Inhibitors / adverse effects
  • Angiotensin-Converting Enzyme Inhibitors / therapeutic use*
  • Anticoagulants / blood
  • Chemokine CCL2 / blood*
  • Double-Blind Method
  • Enalapril / adverse effects
  • Enalapril / therapeutic use*
  • Enzyme-Linked Immunosorbent Assay
  • Female
  • Humans
  • Lipoproteins / blood
  • Macrophages / drug effects
  • Macrophages / immunology
  • Male
  • Middle Aged
  • Monocytes / drug effects*
  • Monocytes / immunology
  • Myocardial Infarction / drug therapy*
  • Myocardial Infarction / immunology
  • Thromboplastin / metabolism*

Substances

  • Angiotensin-Converting Enzyme Inhibitors
  • Anticoagulants
  • Chemokine CCL2
  • Lipoproteins
  • lipoprotein-associated coagulation inhibitor
  • Enalapril
  • Thromboplastin