Phosphoinositides in phagocytosis and macropinocytosis

Biochim Biophys Acta. 2015 Jun;1851(6):805-23. doi: 10.1016/j.bbalip.2014.09.005. Epub 2014 Sep 16.

Abstract

Professional phagocytes provide immunoprotection and aid in the maintenance of tissue homeostasis. They perform these tasks by recognizing, engulfing and eliminating pathogens and endogenous cell debris. Here, we examine the paramount role played by phosphoinositides in phagocytosis and macropinocytosis, two major endocytic routes that mediate the uptake of particulate and fluid matter, respectively. We analyze accumulating literature describing the molecular mechanisms whereby phosphoinositides translate environmental cues into the complex, sophisticated responses that underlie the phagocytic and macropinocytic responses. In addition, we exemplify virulence strategies involving modulation of host cell phosphoinositide signaling that are employed by bacteria to undermine immunity. This article is part of a Special Issue entitled Phosphoinositides.

Keywords: Bacterial pathogen; Fcγ receptor; Macrophage; Macropinocytosis; Phagocytosis; Phosphoinositide.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Bacteria / immunology
  • Bacteria / metabolism*
  • Gene Expression Regulation
  • Humans
  • Immune Evasion
  • Immunity, Cellular
  • Macrophages / immunology
  • Macrophages / metabolism*
  • Macrophages / microbiology
  • Opsonin Proteins / immunology
  • Phagocytosis / genetics*
  • Phagosomes / immunology
  • Phagosomes / metabolism*
  • Phosphatidylinositol 3-Kinases / genetics
  • Phosphatidylinositol 3-Kinases / immunology
  • Phosphatidylinositol 3-Kinases / metabolism
  • Phosphatidylinositols / immunology
  • Phosphatidylinositols / metabolism*
  • Pinocytosis / genetics*
  • Pinocytosis / immunology
  • Receptors, IgG / genetics
  • Receptors, IgG / immunology
  • Receptors, IgG / metabolism
  • Signal Transduction

Substances

  • Opsonin Proteins
  • Phosphatidylinositols
  • Receptors, IgG
  • Phosphatidylinositol 3-Kinases