Involvement of D1 dopamine receptor mechanism in ischemia-induced impairment of CA1 presynaptic fiber spikes in rat hippocampal slices

Yasaharu Yamamoto, Takeshi Tanaka, Shigenobu Shibata, Shigenori Watanabe

研究成果: Article

16 引用 (Scopus)

抄録

The effect of dopamine (DA) receptor agonists and antagonists on hypoxia/hypoglycemia (ischemia)-induced decrease in CA1 presynaptic fiber spikes elicited by the stimulation of Schaffer collateral were investigated using hippocampal slices. Treatment with D1 dopamine receptor antagonist, SCH23390 produced a concentration-dependent attenuation of the ischemia-induced decrease of presynaptic potentials. The magnitude of recovery of the CA1 presynaptic potential in SCH23390-treated slices at 10 and 100 μM was 28 and 54%, respectively. Whereas, treatment with D1 dopamine receptor agonist, SKF38393 exacerbated the ischemia-induced decrease in the CA1 presynaptic potential. The decrease of CA1 presynaptic potential by ischemia was affected by neither D2 dopamine receptor agonist, bromocriptin and quinpirole nor D2 dopamine receptor antagonist, sulpiride. The neuroprotective effect of SCH23390 was completely blocked by cotreatment with SKF38393. The present results demonstrated that the blockade of D1 dopamine receptor function played a neuroprotective role in ischemic damage, suggesting a facilitatory role of D1 dopamine receptor-operated function in ischemia-induced neuronal deficits.

元の言語English
ページ(範囲)151-154
ページ数4
ジャーナルBrain Research
665
発行部数1
DOI
出版物ステータスPublished - 1994 11 28
外部発表Yes

Fingerprint

Dopamine D1 Receptors
Ischemia
Dopamine Agonists
2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepine
Dopamine Antagonists
Quinpirole
Sulpiride
Bromocriptine
Neuroprotective Agents
Hypoglycemia
Hippocampus
SCH 23390

ASJC Scopus subject areas

  • Developmental Biology
  • Molecular Biology
  • Clinical Neurology
  • Neuroscience(all)

これを引用

Involvement of D1 dopamine receptor mechanism in ischemia-induced impairment of CA1 presynaptic fiber spikes in rat hippocampal slices. / Yamamoto, Yasaharu; Tanaka, Takeshi; Shibata, Shigenobu; Watanabe, Shigenori.

:: Brain Research, 巻 665, 番号 1, 28.11.1994, p. 151-154.

研究成果: Article

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