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Related Experiment Video

Updated: Jun 14, 2025

Production and Characterization of Human Macrophages from Pluripotent Stem Cells
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MODELING TISSUE-RESIDENT MACROPHAGE DEVELOPMENT FROM MOUSE PLURIPOTENT STEM CELLS.

Ann K Baako1,2,3, Ragavi Vijayakumar1, Daniel Medina-Cano1

  • 1Developmental Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY, USA.

Biorxiv : the Preprint Server for Biology
|June 4, 2025
PubMed
Summary

Researchers developed a new protocol to efficiently generate tissue-resident macrophages (TRMs) from pluripotent stem cells (PSCs) under defined conditions. This breakthrough enables better study of TRM development and disease modeling.

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Area of Science:

  • Immunology
  • Developmental Biology
  • Stem Cell Biology

Background:

  • Tissue-resident macrophages (TRMs) are crucial innate immune cells for tissue homeostasis and immune surveillance.
  • Existing pluripotent stem cell (PSC) models for TRM development have limitations in efficiency, purity, and reproducibility due to undefined media.
  • These limitations hinder the application of PSC models for studying TRM biology and disease.

Purpose of the Study:

  • To develop an efficient and reproducible protocol for generating mouse TRMs from PSCs under defined conditions.
  • To create a scalable experimental platform for studying TRM development and function.
  • To establish a model system for investigating TRM-related diseases.

Main Methods:

  • Developed a stepwise differentiation protocol from mouse epiblast stem cells (ESCs) to immature TRMs.
  • Utilized a pro-definitive hematopoietic program under defined culture conditions.
  • Assessed the integration and differentiation of PSC-derived TRMs in mouse neural organoids in vitro and in the lung niche in vivo.

Main Results:

  • Achieved efficient and reproducible generation of unspecialized, proliferative TRMs from mouse PSCs.
  • Demonstrated stable integration of PSC-derived immature TRMs into neural organoids, acquiring microglial features.
  • Showed stable engraftment of PSC-derived immature TRMs into the lung niche in vivo, adopting alveolar macrophage characteristics.

Conclusions:

  • The developed protocol provides an efficient and reproducible method for modeling mouse TRM development from PSCs.
  • This new platform overcomes limitations of previous models, offering improved reproducibility and scalability.
  • The PSC-derived TRM model is a powerful tool for studying TRM function and dysfunction in development and disease.