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Quantification of Monocyte Chemotactic Activity In Vivo and Characterization of Blood Monocyte Derived Macrophages
09:57

Quantification of Monocyte Chemotactic Activity In Vivo and Characterization of Blood Monocyte Derived Macrophages

Published on: August 12, 2019

Chemotaxis and activation of particle-challenged human monocytes in response to monocyte migration inhibitory factor

M Lind1, M C Trindade, Y Nakashima

  • 1Orthopedic Research Laboratory, Stanford University School of Medicine, Stanford, California, USA. martinlind@dadlnet.dk

Journal of Biomedical Materials Research
|July 9, 1999
PubMed

Insights

Cytokines near prosthetic implants influence immune cell movement. Monocyte migration inhibition factor (MIF) and chemoattractants like MCP-1 and MIP-1alpha affect macrophage migration but not their activation or inflammatory response in vitro.

Area of Science:

  • Biomedical Engineering
  • Immunology
  • Materials Science

Background:

  • Immune responses to prosthetic implants involve cytokines regulating monocyte migration.
  • Specific cytokines like Monocyte migration inhibition factor (MIF), Monocyte chemoattractant protein (MCP), and macrophage inflammatory protein (MIP) are implicated.
  • These molecules may be part of the foreign body response to prosthetic particulate debris.

Purpose of the Study:

  • To investigate the effects of MIF, MCP-1, and MIP-1alpha on macrophage migration and activation in vitro.
  • To determine the optimal concentrations for migration modulation.
  • To assess the impact on macrophage activation and the release of inflammatory mediators.

Main Methods:

  • Chemotaxis analysis was used to evaluate macrophage migration.
  • Macrophage activation experiments assessed cytokine release (IL-6, TNF-alpha).
  • Dose-response studies were conducted for MIF, MCP-1, and MIP-1alpha.

Main Results:

  • MIF maximally inhibited macrophage migration at 1 ng/mL for both unchallenged and particle-challenged macrophages.
  • MCP-1 and MIP-1alpha maximally stimulated macrophage chemotaxis at concentrations ranging from 1 to 10 ng/mL.
  • None of the tested cytokines modulated macrophage activation or the release of IL-6 and TNF-alpha.

Conclusions:

  • MIF, MCP-1, and MIP-1alpha differentially regulate macrophage migration in vitro.
  • These cytokines do not appear to significantly affect macrophage activation or the release of key proinflammatory mediators in this experimental setting.
  • Findings contribute to understanding the immune response to biomaterials and prosthetic devices.

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