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Isolation of Mouse Peritoneal Cavity Cells
04:32

Isolation of Mouse Peritoneal Cavity Cells

Published on: January 28, 2010

Cellular renewal and improvement of local cell effector activity in peritoneal cavity in response to infectious

Alexandra dos Anjos Cassado1, José Antônio Tavares de Albuquerque, Luiz Roberto Sardinha

  • 1Departamento de Ciências Biológicas, Campus Diadema e Centro de Terapia Celular e Molecular (CTC-Mol), Universidade Federal de São Paulo, Diadema, São Paulo, Brasil.

Plos One
|July 30, 2011
PubMed

Insights

Infectious stimuli alter peritoneal cavity immune cells, replacing large peritoneal macrophages (LPM) with small peritoneal macrophages (SPM) and monocytes. This shift enhances the cavity's immune response and effector activity.

Area of Science:

  • Immunology
  • Cell Biology
  • Peritoneal Cavity Research

Background:

  • The peritoneal cavity (PerC) hosts diverse interacting cell populations.
  • Intraperitoneal (i.p.) inoculation is common, but PerC cell dynamics are poorly understood.
  • Peritoneal macrophages (MØ) exist as distinct subsets, small peritoneal MØ (SPM) and large peritoneal MØ (LPM).

Purpose of the Study:

  • To investigate the dynamics of peritoneal MØ subsets (SPM and LPM) within the PerC.
  • To understand how infectious stimuli influence the myelo-monocytic compartment in the PerC.
  • To identify the key effector cells responsible for enhanced PerC activity post-stimulation.

Main Methods:

  • C57BL/6 mice were injected i.p. with zymosan or Trypanosoma cruzi.
  • Analysis of peritoneal lavage fluid and adherent cells.
  • Assessment of senescence marker (β-galactosidase), nitric oxide (NO) production, and cytokine profiles (IL-12) following stimulation (LPS, IFN-γ).

Main Results:

  • Infectious stimuli led to LPM disappearance and SPM/monocyte accumulation in the PerC.
  • Adherent cells showed reduced senescence markers and increased NO production.
  • SPMs exhibited higher phagocytic activity and were the primary source of IL-12, indicating enhanced effector function.

Conclusions:

  • Infectious stimuli induce significant changes in peritoneal MØ subpopulations.
  • The replacement of LPM by SPM and monocytes enhances overall PerC effector activity.
  • SPMs are identified as key effector cells in the activated peritoneal cavity.

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