Role of the subthalamic nucleus in cannabinoid actions in the substantia nigra of the rat.

Role of the subthalamic nucleus in cannabinoid actions in the substantia nigra of the rat.
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丘脑底核在大鼠黑质大麻素作用中的作用。

DOI:
10.1152/jn.1997.77.3.1635
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发表时间:
1997
影响因子:
2.5
通讯作者:
Walker,JM
Walker,JM
中科院分区:
医学3区
文献类型:
--
作者:
Sañudo-Peña,MC;Walker,JM

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Sañudo-Peña, M. Clara和J. Michael Walker。大鼠黑质大麻素在丘脑下核中的作用[j]。中国生物医学工程学报,32(2):444 - 444。探讨大麻素对丘脑下核向网状黑质(SNr)输入兴奋性信号的影响。为此,在丘脑下核的吻侧进行刀切,将丘脑下核和信噪比与纹状体分离,纹状体是大麻素受体信噪比的主要来源。数据显示,大麻素激动剂WIN55,212-2可阻断双核碱刺激丘脑底核引起的SNr神经元放电率升高。此外,大麻素拮抗剂SR141716A可以拮抗大麻素激动剂的作用。这项研究表明,大麻素不仅调节纹状体神经通路,如以前报道的,还调节丘脑下神经通路。这两种输入对信噪比的相反影响,抑制性和兴奋性,表明内源性大麻素在信噪比的生理调节中起主要作用。
Sañudo-Peña, M. Clara and J. Michael Walker.Role of the subthalamic nucleus in cannabinoid actions in the substantia nigra of the rat.J. Neurophysiol.77: 1635–1638, 1997. The effect of cannabinoids on the excitatory input to the substantia nigra reticulata (SNr) from the subthalamic nucleus was explored. For this purpose a knife cut was performed rostral to the subthalamic nucleus to isolate the subthalamic nucleus and the SNr from the striatum, a major source of cannabinoid receptors to the SNr. The data showed that the cannabinoid agonist WIN55,212-2 blocked the increase in the firing rate of SNr neurons induced by stimulation of the subthalamic nucleus with bicuculline. Furthermore, the cannabinoid antagonist SR141716A antagonized the effect of the cannabinoid agonist. This study showed that cannabinoids regulate not only the striatonigral pathway, as previously reported, but also the subthalamonigral pathway. The opposite influences of these two inputs to the SNr, inhibitory and excitatory respectively, suggest that endogenous cannabinoids play a major role in the physiological regulation of the SNr.
大麻素调节培养的海马神经元中的钾电流。
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