TRPV2 has a pivotal role in macrophage particle binding and phagocytosis

Research output: Contribution to journalArticle

Abstract

Macrophage phagocytosis is critical for defense against pathogens. Whereas many steps of phagocytosis involve ionic flux, the underlying ion channels remain ill defined. Here we show that zymosan-, immunoglobulin G (IgG)-and complement-mediated particle binding and phagocytosis were impaired in macrophages lacking the cation channel TRPV2. TRPV2 was recruited to the nascent phagosome and depolarized the plasma membrane. Depolarization increased the synthesis of phosphatidylinositol-4,5-bisphosphate (PtdIns(4,5)P 2), which triggered the partial actin depolymerization necessary for occupancy-elicited phagocytic receptor clustering. TRPV2-deficient macrophages were also defective in chemoattractant-elicited motility. Consequently, TRPV2-deficient mice showed accelerated mortality and greater organ bacterial load when challenged with Listeria monocytogenes. Our data demonstrate the participation of TRPV2 in early phagocytosis and its fundamental importance in innate immunity.

Original languageEnglish (US)
Pages (from-to)232-239
Number of pages8
JournalNature Immunology
Volume11
Issue number3
DOIs
StatePublished - Mar 1 2010

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ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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