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Related Experiment Video

Updated: Jun 6, 2026

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

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

Published on: August 12, 2019

The chemorepellent Slit3 promotes monocyte migration.

Sacha B Geutskens¹, Peter L Hordijk, Paula B van Hennik

¹Department of Molecular Cell Biology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.

Journal of Immunology (Baltimore, Md. : 1950)

|November 17, 2010

Summary

This summary is machine-generated.

Slit3 protein unexpectedly enhances monocyte migration and myeloid cell recruitment during inflammation by activating RhoA, revealing a novel role in inflammatory responses.

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Area of Science:

Immunology
Cell Biology
Molecular Biology

Background:

Monocyte migration is crucial for inflammatory responses.
Chemoattractants regulate monocyte infiltration.
Slit proteins, secreted by endothelial cells, typically inhibit leukocyte migration.

Purpose of the Study:

To investigate the effect of Slit3 on primary monocyte migration.
To elucidate the underlying molecular mechanisms of Slit3 action on monocytes.

Main Methods:

Investigated Slit3-Robo1 interaction in CD14(+) monocytes.
Assessed monocyte migration in vitro (spontaneous and chemoattractant-induced).
Evaluated myeloid cell recruitment in vivo during peritoneal inflammation.
Analyzed monocyte spreading, adhesion, and RhoA activation.

Main Results:

Slit3 stimulation increased spontaneous and chemoattractant-induced monocyte migration in vitro.
Slit3 enhanced myeloid cell recruitment in vivo.
Slit3 induced monocyte rounding without affecting adhesion.
Slit3 activated RhoA, a key regulator of cell migration.

Conclusions:

Slit3 has an unexpected pro-migratory effect on monocytes.
Slit3 acts as a chemokinetic factor, enhancing chemoattractant-driven migration.
Slit3 influences monocyte morphology and migration via RhoA activation, offering new insights into inflammatory cell recruitment.