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P2Y1 receptor antagonists mitigate oxygen and glucose deprivation‑induced astrocyte injury

Hui Guo1, Zhong-Qiang Liu1, Hui Zhou1

  • 1Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China.

Molecular Medicine Reports
|December 20, 2017
PubMed

Insights

Blocking calcium signaling in astrocytes (ASs) with MRS2179, a P2Y1 receptor antagonist, mitigates oxygen and glucose deprivation (OGD)-induced injury. This approach reduces excessive calcium and glutamic acid release, enhancing astrocyte survival.

Area of Science:

  • Neuroscience
  • Cell Biology
  • Biochemistry

Background:

  • Astrocytes (ASs) play crucial roles in brain function and injury.
  • Oxygen and glucose deprivation (OGD) induces significant astrocyte injury.
  • Calcium signaling is implicated in astrocyte response to OGD.

Purpose of the Study:

  • To investigate the effects of blocking astrocyte calcium signaling on OGD-induced injury.
  • To examine the association between ATP, glutamic acid release, and calcium signaling in OGD.
  • To evaluate the protective potential of a P2Y1 receptor antagonist against OGD-induced astrocyte damage.

Main Methods:

  • Primary astrocyte cultures from Sprague Dawley rats were subjected to OGD.
  • Extracellular ATP and glutamic acid concentrations were measured.
  • Intracellular calcium ion (Ca2+) levels were detected.
  • The effects of MRS2179 (P2Y1 receptor antagonist) on OGD-exposed astrocytes were analyzed.

Main Results:

  • OGD induced a time-dependent release of glutamic acid and ATP from astrocytes.
  • Elevated intracellular Ca2+ peaked 16 hours post-OGD.
  • MRS2179 treatment potentially blocked excessive glutamic acid release and mitigated OGD-induced astrocyte injury.
  • Astrocytes express P2Y1 receptors, which may regulate intracellular calcium.

Conclusions:

  • Blocking the P2Y1 receptor with MRS2179 can protect astrocytes from OGD-induced injury.
  • Inhibition of excessive intracellular calcium and glutamic acid release is a key mechanism of MRS2179's protective effect.
  • Targeting astrocyte calcium signaling presents a potential therapeutic strategy for ischemic brain injury.

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