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Single-Cell Calcium Imaging for Studying the Activation of Calcium Ion Channels
07:17

Single-Cell Calcium Imaging for Studying the Activation of Calcium Ion Channels

Published on: December 13, 2024

Eicosanoid-induced store-operated calcium entry in dendritic cells

Kiyoshi Itagaki1, Beverly E Barton, Thomas F Murphy

  • 1Division of Trauma, Department of Surgery, University of Medicine and Dentistry of New Jersey-New Jersey Medical School, Newark, New Jersey 07101, USA.

The Journal of Surgical Research
|January 19, 2010
PubMed

Insights

Eicosanoids, such as leukotriene B4 and LTD4, influence dendritic cell (DC) calcium levels by depleting endoplasmic reticulum stores. This finding reveals a novel mechanism for regulating DC function and immune responses.

Area of Science:

  • Immunology
  • Cell Biology
  • Calcium Signaling

Background:

  • Eicosanoids modulate immune cells, including dendritic cells (DCs).
  • Dendritic cell maturation and function are influenced by store-operated calcium entry (SOCE).
  • Intracellular calcium dynamics may mediate eicosanoid effects on DCs.

Purpose of the Study:

  • To investigate the impact of eicosanoids on calcium mobilization in dendritic cells.
  • To determine if eicosanoids affect store-operated calcium entry (SOCE) in DCs.
  • To explore the role of intracellular calcium in eicosanoid-mediated DC function.

Main Methods:

  • Dendritic cells (DCs) were generated from mouse bone marrow.
  • The effects of eicosanoids on intracellular calcium levels and SOCE were measured.
  • RT-PCR was used to identify relevant receptors and ion channels in DCs.

Main Results:

  • Leukotriene B4 (LTB4) and LTD4 depleted calcium from DC endoplasmic reticulum stores.
  • Specific antagonists blocked LTB4 and LTD4-induced calcium store depletion.
  • DCs express receptors for LTB4 and cysteinyl-leukotrienes, along with TRPC and STIM1 proteins involved in SOCE.
  • Prostaglandin E2 (PGE2) did not affect DC calcium mobilization.

Conclusions:

  • Eicosanoids exhibit distinct effects on dendritic cell calcium mobilization.
  • These findings suggest a novel mechanism for regulating DC maturation via calcium signaling.
  • This has significant implications for understanding immune and non-immune inflammatory processes.
Abstract

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