Regulation of Phagocytosis in Macrophages by Membrane Ethanolamine Plasmalogens.

Abstract:

:Macrophages, as professional phagocytes of the immune system, possess the ability to detect and clear invading pathogens and apoptotic cells through phagocytosis. Phagocytosis involves membrane reorganization and remodeling events on the cell surface, which play an essential role in innate immunity and tissue homeostasis and the control of inflammation. In this work, we report that cells deficient in membrane ethanolamine plasmalogen demonstrate a reduced capacity to phagocytize opsonized zymosan particles. Amelioration of plasmalogen deficiency in these cells by incubation with lysoplasmalogen results in a significant augmentation of the phagocytic capacity of the cells. In parallel with these increases, restoration of plasmalogen levels in the cells also increases the number and size of lipid rafts in the membrane, reduces membrane fluidity down to levels found in cells containing normal plasmalogen levels, and improves receptor-mediated signaling. Collectively, these results suggest that membrane plasmalogen level determines characteristics of the plasma membrane such as fluidity and the formation of microdomains that are necessary for efficient signal transduction leading to optimal phagocytosis by macrophages.

journal_name

Front Immunol

journal_title

Frontiers in immunology

authors

Rubio JM,Astudillo AM,Casas J,Balboa MA,Balsinde J

doi

10.3389/fimmu.2018.01723

subject

Has Abstract

pub_date

2018-07-24 00:00:00

pages

1723

issn

1664-3224

journal_volume

9

pub_type

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