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Related Experiment Videos

[Regulation of microglial cell function by ATP].

S Honda1, S Kohsaka

  • 1Department of Neurochemistry, National Institute of Neuroscience, 4-1-1, Ogawahigashi, Kodaira, 187-8502 Japan.

Nihon Shinkei Seishin Yakurigaku Zasshi = Japanese Journal of Psychopharmacology
|January 5, 2002
PubMed
Summary

Extracellular adenosine triphosphate (ATP) influences nervous system cells. New findings reveal that ATP and ADP activate P2Y receptors, mediating microglial membrane ruffles and chemotaxis, distinct from P2X receptors.

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Immunology

Context:

  • Extracellular adenosine triphosphate (ATP) plays diverse roles in the nervous system, affecting both neurons and glial cells.
  • While ATP's roles as a neurotransmitter are known, its specific functions in glial cells, particularly microglia, are increasingly recognized.
  • Previous research indicated ATP's involvement in microglial activation, cytokine release (e.g., interleukin-1 beta, tumor necrosis factor-alpha), and even cell death via P2X7 receptors.

Purpose:

  • To investigate the distinct mechanisms by which extracellular ATP and ADP influence microglial cell behavior.
  • To elucidate the roles of specific purinergic receptors (P2X and P2Y) in mediating these microglial responses.
  • To understand the implications of these purinergic signaling pathways in both normal physiological and disease-related pathological states of the nervous system.

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Summary:

  • Extracellular adenosine triphosphate (ATP) and adenosine diphosphate (ADP) were found to induce the formation of membrane ruffles and chemotaxis in microglia.
  • These cellular responses are mediated through Gi/o-coupled P2Y receptors, representing a signaling pathway distinct from the previously characterized P2X7 receptor.
  • The study highlights the involvement of two distinct purinergic receptor families, P2X and P2Y, in regulating diverse microglial functions.

Impact:

  • Identifies novel signaling pathways (P2Y receptors) involved in microglial dynamics, expanding our understanding of glial cell function.
  • Provides a basis for exploring therapeutic strategies targeting purinergic receptors to modulate microglial activity in neurological disorders.
  • Contributes to a more comprehensive understanding of the complex roles of extracellular ATP in the nervous system, encompassing both physiological and pathological conditions.