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A new tractable method for generating human alveolar macrophage-like cells in vitro to study lung inflammatory

Susanta Pahari1, Eusondia Arnett1, Jan Simper1,2

  • 1Host Pathogen Interactions and Population Health Programs, Texas Biomedical Research Institute , San Antonio, Texas, USA.

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Summary

Researchers developed a cost-effective method to generate human alveolar macrophage-like (AML) cells from blood monocytes. This novel model mimics the lung environment, aiding research into respiratory diseases and therapies.

Keywords:
Mycobacterium tuberculosisSARS-CoV-2alveolar macrophage-like (AML) cellshuman alveolar macrophageslung cytokinesoxidative phosphorylationsurfactant

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Area of Science:

  • Pulmonary immunology
  • Cell biology
  • Infectious disease research

Background:

  • Human alveolar macrophages (HAMs) are crucial for lung immunity but difficult to obtain and culture.
  • Existing methods for studying HAMs are limited, hindering research into pulmonary diseases.

Purpose of the Study:

  • To develop a cost-effective and accessible in vitro model for human alveolar macrophages (HAMs).
  • To generate and characterize human alveolar macrophage-like (AML) cells from peripheral blood monocytes.

Main Methods:

  • Differentiated monocytes into AMLs using a culture medium containing lung lipids (Infasurf) and specific cytokines (GM-CSF, TGF-β, IL-10).
  • Mimicked the human lung alveolar environment in vitro.
  • Assessed AML susceptibility to Mycobacterium tuberculosis and SARS-CoV-2 infections.

Main Results:

  • Successfully generated AML cells with a phenotype and function similar to primary HAMs.
  • AML cells demonstrated susceptibility to M. tuberculosis and SARS-CoV-2.
  • The model provides a stable and accessible source of HAM-like cells for research.

Conclusions:

  • The novel culture method effectively generates AML cells, overcoming limitations of primary HAM access.
  • This accessible AML model is valuable for studying lung infectious and inflammatory diseases.
  • The model supports research on therapies and vaccines for respiratory pathogens.