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Related Experiment Video

Updated: Jun 16, 2026

Isolation of Murine Peritoneal Macrophages to Carry Out Gene Expression Analysis Upon Toll-like Receptors Stimulation
08:21

Isolation of Murine Peritoneal Macrophages to Carry Out Gene Expression Analysis Upon Toll-like Receptors Stimulation

Published on: April 29, 2015

Two physically, functionally, and developmentally distinct peritoneal macrophage subsets.

Eliver Eid Bou Ghosn1, Alexandra A Cassado, Gregory R Govoni

  • 1Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA. eliverg@stanford.edu

Proceedings of the National Academy of Sciences of the United States of America
|February 6, 2010
PubMed
Summary
This summary is machine-generated.

Two distinct macrophage subsets reside in the peritoneal cavity: large peritoneal macrophages (LPM) and small peritoneal macrophages (SPM). SPM are derived from blood monocytes and are crucial for immune responses following stimulation.

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Depletion and Reconstitution of Macrophages in Mice
08:50

Depletion and Reconstitution of Macrophages in Mice

Published on: August 1, 2012

Area of Science:

  • Immunology
  • Cell Biology
  • Macrophage Biology

Background:

  • The peritoneal cavity (PerC) harbors diverse immune cells, with macrophages (MØ) frequently studied.
  • Existing knowledge on PerC MØ heterogeneity and development is incomplete.
  • Understanding PerC MØ subsets is crucial for interpreting ex vivo functional studies.

Purpose of the Study:

  • To define and characterize distinct macrophage subsets within the adult mouse peritoneal cavity.
  • To investigate the origin, development, and functional responses of these macrophage subsets.
  • To elucidate the impact of stimulation on PerC macrophage populations.

Main Methods:

  • Isolation and characterization of peritoneal macrophages (MØ) from adult mice.
  • Flow cytometry analysis using surface markers (CD11b, F4/80, MHC-II).
  • In vivo and in vitro stimulation with lipopolysaccharide (LPS) and thioglycolate.
  • Assessment of nitric oxide (NO) production and phagocytic activity.

Main Results:

  • Two MØ subsets identified: large peritoneal MØ (LPM) and small peritoneal MØ (SPM).
  • LPM (90% in unstimulated PerC) express high CD11b/F4/80, disappear upon stimulation.
  • SPM express low CD11b/F4/80, high MHC-II, originate from blood monocytes post-stimulation.
  • Both subsets are phagocytic and produce NO; LPS differentially affects their NO production in vitro and in vivo.

Conclusions:

  • The peritoneal cavity contains at least two distinct macrophage subsets with differing origins and responses.
  • SPM are derived from blood monocytes and are critical responders to inflammatory stimuli.
  • Findings reveal novel insights into PerC MØ heterogeneity, development, and function, impacting data interpretation.