Influence of membrane cholesterol on monocyte chemotaxis

Cell Immunol. 2018 Feb:324:74-77. doi: 10.1016/j.cellimm.2017.12.005. Epub 2017 Dec 9.

Abstract

Cholesterol content influences several important physiological functions due to its effect on membrane receptors. In this work, we tested the hypothesis that cellular cholesterol alters chemotactic response of monocytes to Monocyte Chemoattractant Protein-1 (MCP-1) due to their effect on the receptor, CCR2. We used Methyl-β-cyclodextrin (MβCD) to alter the baseline cholesterol in human monocytic cell line THP-1, and evaluated their chemotactic response to MCP-1. Compared to untreated cells, cholesterol enrichment increased the number of monocytes transmigrated in response to MCP-1 while depletion had opposite effect. Using imaging flow cytometry, we established that these differences were due to alterations in expression levels, but not the surface distribution, of CCR2.

Keywords: AMNIS; CCR2; Cholesterol; MCP-1; MβCD; THP-1; Transwell.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cells, Cultured
  • Chemokine CCL2 / metabolism
  • Chemotaxis, Leukocyte / physiology*
  • Cholesterol / metabolism*
  • Humans
  • Monocytes / metabolism*
  • Receptors, CCR2 / metabolism*
  • Receptors, Chemokine / metabolism*
  • THP-1 Cells
  • beta-Cyclodextrins / pharmacology

Substances

  • CCL2 protein, human
  • CCR2 protein, human
  • Chemokine CCL2
  • Receptors, CCR2
  • Receptors, Chemokine
  • beta-Cyclodextrins
  • methyl-beta-cyclodextrin
  • Cholesterol