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Contribution of Macrophage Efferocytosis to Liver Homeostasis and Disease

Andrea Kristina Horst1, Gisa Tiegs1, Linda Diehl1

  • 1Institute for Experimental Immunology and Hepatology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.

Frontiers in Immunology
|December 5, 2019
PubMed

Insights

Efficient clearance of apoptotic cells by liver macrophages is crucial for tissue homeostasis and regeneration. Efferocytosis, the process of engulfing dead cells, by hepatic phagocytes regulates these vital functions in liver disease.

Area of Science:

  • Immunology
  • Cell Biology
  • Hepatology

Background:

  • Apoptotic cell clearance is essential for tissue homeostasis and regeneration after injury.
  • The liver removes aged and damaged cells, acting as a site for effector T cell clearance.
  • While Kupffer cells are key phagocytes, inflammatory responses can involve neutrophils and monocytes, potentially causing damage.

Purpose of the Study:

  • To discuss the role of efferocytosis mechanisms in hepatic macrophages and phagocytes.
  • To explore how these mechanisms regulate tissue homeostasis in the liver.
  • To investigate their involvement in liver disease and tissue regeneration.

Main Methods:

  • Review of efferocytosis mechanisms in hepatic macrophages.
  • Analysis of signaling pathways activated during efferocytosis.
  • Discussion of environmental sensing by myeloid cells during inflammation.

Main Results:

  • Efferocytosis by hepatic phagocytes is critical for resolving inflammation and restoring homeostasis.
  • Changes in myeloid cell function, driven by inflammatory signals, promote resolution.
  • Signaling pathways activated by apoptotic cell engulfment are key to tissue repair.

Conclusions:

  • Efferocytosis mechanisms in liver phagocytes are central to maintaining tissue homeostasis.
  • These mechanisms play a significant role in liver regeneration, particularly in the context of liver disease.
  • Understanding efferocytosis is vital for developing strategies to promote liver repair.
Keywords:
apoptosiscytokinesefferocytosisinflammationliver injurymacrophagephagocytosisresolution

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