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Updated: Jul 4, 2026
Primary Microglia Isolation from Mixed Glial Cell Cultures of Neonatal Rat Brain Tissue
Published on: August 15, 2012
Prostaglandin E2 reduces extracellular ATP-induced migration in cultured rat microglia
Takayuki Nagano1, Shinya H Kimura, Motohiko Takemura
1Department of Pharmacology, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501, Japan.
Abstract:
Treatment with 100 microM adenosine triphosphate (ATP) for 120 min augmented migration of cultured rat microglia by about 4-fold. This augmentation was effectively reduced by 0.1-10 microM prostaglandin E(2) (PGE(2)). PGE(2)-mediated reduction was reversed by the EP2 antagonist AH6809 at 10 microM. The EP2 agonist butaprost also reduced ATP-induced migration at 10 microM, whereas the EP1 agonist 17-phenyl trinor PGE(2), the EP3 agonist sulprostone, and the EP4 agonist PGE(1) alcohol all had no effect at 10 microM. In addition, ATP-induced migration was reduced by the adenylate cyclase activator forskolin at 100 microM, whereas the adenylate cyclase inhibitor SQ22536 reversed the effect of PGE(2) on ATP-induced migration at 100 microM. Over the same experimental duration, PGE(2), butaprost, and forskolin had little effect on cell viability. These findings indicate that ATP-induced microglial migration is reduced by PGE(2) through EP2 and adenylate cyclase.
Insights
Adenosine triphosphate (ATP) enhances rat microglia cell migration. Prostaglandin E2 (PGE2) reduces this migration via EP2 receptors and adenylate cyclase, impacting immune cell movement.
Area of Science:
- Neuroimmunology
- Cellular Biology
- Pharmacology
Background:
- Microglia play crucial roles in brain immunity and inflammation.
- Adenosine triphosphate (ATP) is increasingly recognized as a modulator of microglial function.
- Prostaglandin E2 (PGE2) is a key inflammatory mediator with diverse effects on immune cells.
Purpose of the Study:
- To investigate the regulatory mechanisms of ATP-induced microglial migration.
- To determine the role of Prostaglandin E2 (PGE2) and its receptors in modulating microglial migration.
- To elucidate the involvement of adenylate cyclase signaling in this process.
Main Methods:
- Primary rat microglia cultures were utilized.
- Cell migration was assessed following treatment with ATP, PGE2, and specific receptor agonists/antagonists.
- Adenylate cyclase activity was modulated using forskolin and SQ22536.
- Cell viability was evaluated to ensure specificity of observed effects.
Main Results:
- ATP (100 microM) significantly augmented microglial migration by approximately 4-fold.
- PGE2 (0.1-10 microM) dose-dependently reduced ATP-induced migration.
- The EP2 receptor antagonist AH6809 reversed PGE2's inhibitory effect, while the EP2 agonist butaprost mimicked PGE2's action.
- EP1, EP3, and EP4 receptor agonists did not affect ATP-induced migration.
- Forskolin (an adenylate cyclase activator) reduced migration, and SQ22536 (an inhibitor) reversed PGE2's effect.
- PGE2, butaprost, and forskolin did not compromise cell viability.
Conclusions:
- PGE2 inhibits ATP-induced microglial migration primarily through the EP2 receptor.
- Adenylate cyclase signaling is a critical downstream pathway mediating PGE2's inhibitory effect on microglial migration.
- These findings highlight a novel regulatory axis controlling microglial cell movement relevant to neuroinflammation.
