Interleukin-17 (IL-17) expression is reduced during acute myocardial infarction: role on chemokine receptor expression in monocytes and their in vitro chemotaxis towards chemokines

Toxins (Basel). 2012 Nov 30;4(12):1427-39. doi: 10.3390/toxins4121427.

Abstract

The roles of immune cells and their soluble products during myocardial infarction (MI) are not completely understood. Here, we observed that the percentages of IL-17, but not IL-22, producing cells are reduced in mice splenocytes after developing MI. To correlate this finding with the functional activity of IL-17, we sought to determine its effect on monocytes. In particular, we presumed that this cytokine might affect the chemotaxis of monocytes important for cardiac inflammation and remodeling. We observed that IL-17 tends to reduce the expression of two major chemokine receptors involved in monocyte chemotaxis, namely CCR2 and CXCR4. Further analysis showed that monocytes pretreated with IL-17 have reduced in vitro chemotaxis towards the ligand for CCR2, i.e., MCP-1/CCL2, and the ligand for CXCR4, i.e., SDF-1α/CXCL12. Our results support the possibility that IL-17 may be beneficial in MI, and this could be due to its ability to inhibit the migration of monocytes.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Chemokines / metabolism*
  • Chemotaxis / drug effects*
  • Interleukin-17 / pharmacology*
  • Interleukin-22
  • Interleukins / pharmacology
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Monocytes / drug effects*
  • Monocytes / physiology
  • Myocardial Infarction / metabolism*
  • Receptors, CCR2 / metabolism
  • Receptors, CXCR4 / metabolism
  • Receptors, Interleukin / metabolism
  • Receptors, Interleukin-17 / metabolism
  • Spleen / cytology

Substances

  • CXCR4 protein, mouse
  • Ccr2 protein, mouse
  • Chemokines
  • Interleukin-17
  • Interleukins
  • Receptors, CCR2
  • Receptors, CXCR4
  • Receptors, Interleukin
  • Receptors, Interleukin-17
  • interleukin-22 receptor