ATP-and Adenosine-Mediated Signaling in the Central Nervous System : Adenosine Stimulates Glutamate Release From Astrocytes via A_<2a> Adenosine Receptors

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概要

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• Adenosine enhanced intracellular Ca2+ concentrations in astrocytes via A2a adenosine receptors involving protein kinase A (PKA) activation. The Ca2+ rise is inhibited by brefeldin A, an inhibitor of vesicular transport; but not by neomycin and U73122, phospholipase C inhibitors; xestospongin, an IP3-receptor inhibitor; ryanodine, a ryanodine-receptor inhibitor; TMB-8, an endoplasmic reticulum calcium-release blocker; octanol, a gap-junction inhibitor; or cadmium, a non-selective, calcium-channel blocker. Adenosine stimulates astrocytic glutamate release via an A2a adenosine receptors/PKA pathway, and the release is inhibited by the vesicular transport inhibitors brefeldin A and bafilomycin A1. A2a adenosine receptors and the ensuing PKA events, thus, are endowed with vesicular Ca2+ release from an unknown intracellular calcium store and vesicular glutamate release from astrocytes.

• 社団法人 日本薬理学会の論文
• 2004-02-01

著者

• Nishizaki Tomoyuki

  Department Of Neurosurgery Tsuna Hospital

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• ATP-and Adenosine-Mediated Signaling in the Central Nervous System : Adenosine Stimulates Glutamate Release From Astrocytes via A_ Adenosine Receptors

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