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Mesenchymal Stem Cell Regulation of Macrophage Phagocytosis; Quantitation and Imaging
09:10

Mesenchymal Stem Cell Regulation of Macrophage Phagocytosis; Quantitation and Imaging

Published on: July 16, 2021

Tissue-resident mesenchymal stem cells attract peripheral blood neutrophils and enhance their inflammatory activity

Sven Brandau1, Mark Jakob, Hatim Hemeda

  • 1University Hospital Essen, Hufelandstrasse 55, Essen, Germany. sven.brandau@uk-essen.de

Journal of Leukocyte Biology
|August 5, 2010
PubMed

Insights

Tissue-specific mesenchymal stem cells (MSCs) instruct neutrophils during early bacterial challenges. Activated MSCs recruit and enhance neutrophil function, suggesting a key role in initial pathogen defense before broader immune cell recruitment.

Area of Science:

  • Immunology
  • Stem Cell Biology
  • Microbiology

Background:

  • Mesenchymal stem cells (MSCs) are found in various tissues, potentially in perivascular regions.
  • The functional role of tissue-specific MSCs in immune responses remains largely unknown.

Purpose of the Study:

  • To investigate the hypothesis that tissue-specific MSCs play an instructional role in early bacterial challenge responses.
  • To analyze cellular interactions between glandular MSCs and neutrophils upon lipopolysaccharide (LPS) stimulation.

Main Methods:

  • Co-culture system of glandular MSCs and peripheral blood neutrophils.
  • Stimulation with bacterial endotoxin (LPS).
  • Analysis of chemokine receptor expression, cell mobility, cytokine secretion, and neutrophil lifespan and responsiveness.

Main Results:

  • LPS stimulation induced chemokine receptor expression and mobility in MSCs.
  • Activated MSCs secreted inflammatory cytokines and recruited neutrophils via IL-8 and MIF.
  • Recruited neutrophils exhibited prolonged lifespan, increased inflammatory chemokine expression, and enhanced LPS responsiveness.

Conclusions:

  • Demonstrates a complex interaction between tissue-resident MSCs and neutrophils during bacterial challenge.
  • Suggests a role for MSCs in the early stages of pathogen defense, preceding the recruitment of classical immune cells.

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