Brief cross-linking of Fas/APO-1 (CD95) triggers engulfment of pre-apoptotic target cells

FEBS Lett. 2008 Oct 15;582(23-24):3501-8. doi: 10.1016/j.febslet.2008.09.020. Epub 2008 Sep 18.

Abstract

Macrophage clearance of dying cells is of crucial importance to maintain tissue homeostasis. Here, we show that brief treatment (15min) of Jurkat T cells with agonistic anti-Fas antibodies or recombinant Fas ligand results in efficient phagocytosis by human monocyte-derived macrophages prior to the occurrence of common biomarkers of apoptosis. Similar findings were obtained when using primary human T cells. Macrophage engulfment of pre-apoptotic target cells was suppressed in the absence of serum. Moreover, pre-apoptotic cells secreted annexin I and administration of Boc1, a formyl peptide receptor/lipoxin receptor antagonist markedly attenuated their engulfment. Finally, pre-apoptotic Jurkat cells induced lower macrophage production of tumor necrosis factor-alpha and higher production of interleukin-10 in comparison to apoptotic target cells.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Annexin A1 / physiology
  • Antibodies / immunology
  • Antibodies / pharmacology
  • Apoptosis*
  • Caspases / metabolism
  • Cytokines / biosynthesis
  • Fas Ligand Protein / genetics
  • Fas Ligand Protein / immunology
  • Humans
  • Jurkat Cells
  • Macrophage Activation
  • Macrophages / drug effects
  • Macrophages / immunology*
  • Phagocytosis*
  • T-Lymphocytes / cytology
  • T-Lymphocytes / immunology*
  • fas Receptor / antagonists & inhibitors*
  • fas Receptor / immunology

Substances

  • Annexin A1
  • Antibodies
  • Cytokines
  • Fas Ligand Protein
  • fas Receptor
  • Caspases