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Science. 2005 Dec 2;310(5753):1492-5. Epub 2005 Nov 10.

A role for the phagosome in cytokine secretion.

Author information

1
Institute for Molecular Bioscience, University of Queensland, Brisbane, Queensland 4072, Australia.

Abstract

Membrane traffic in activated macrophages is required for two critical events in innate immunity: proinflammatory cytokine secretion and phagocytosis of pathogens. We found a joint trafficking pathway linking both actions, which may economize membrane transport and augment the immune response. Tumor necrosis factor alpha (TNFalpha) is trafficked from the Golgi to the recycling endosome (RE), where vesicle-associated membrane protein 3 mediates its delivery to the cell surface at the site of phagocytic cup formation. Fusion of the RE at the cup simultaneously allows rapid release of TNFalpha and expands the membrane for phagocytosis.

PMID:
16282525
DOI:
10.1126/science.1120225
[Indexed for MEDLINE]
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