N-type voltage gated calcium channels mediate excitatory synaptic transmission in the anterior cingulate cortex of adult mice.

N-type voltage gated calcium channels mediate excitatory synaptic transmission in the anterior cingulate cortex of adult mice.
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DOI:
10.1186/1744-8069-9-58
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发表时间:
2013-11-14
期刊:
影响因子:
3.3
通讯作者:
Zhuo M
Zhuo M
中科院分区:
医学3区
文献类型:
--
作者:
Kang SJ;Liu MG;Shi TY;Zhao MG;Kaang BK;Zhuo M

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电压门控钙通道(VGCC)因其在外周和中枢神经系统突触传递中的重要性而闻名。然而,不同 VGCC 在前扣带皮层 (ACC) 中的作用尚未被研究。在这里,我们使用多电极阵列记录系统(MED64)来研究不同类型的钙通道在 ACC 中谷氨酸能兴奋性突触传递中的贡献。我们发现,只有N型钙通道阻滞剂ω-芋螺毒素-GVIA(ω-Ctx-GVIA)对基础突触传递产生很大的抑制作用,特别是在浅层。其他作用于 L-、P/Q-、R-和 T-型的钙通道阻滞剂没有效果。我们还测试了几种神经调节剂在有或没有 ω-Ctx-GVIA 的情况下的效果。我们发现 N 型 VGCC 部分参与了 (1S,3R)-1-氨基环戊烷-1,3-二甲酸和 (R)-巴氯芬诱导的突触抑制。相比之下,无论有或没有 ω-Ctx-GVIA,2-氯腺苷和氯化氨基甲酰胆碱的抑制作用没有差异,表明它们可能通过其他机制发挥作用。我们的结果提供了强有力的证据,证明 N 型 VGCC 介导 ACC 中的快速突触传递。
Voltage gated calcium channels (VGCCs) are well known for its importance in synaptic transmission in the peripheral and central nervous system. However, the role of different VGCCs in the anterior cingulate cortex (ACC) has not been studied. Here, we use a multi-electrode array recording system (MED64) to study the contribution of different types of calcium channels in glutamatergic excitatory synaptic transmission in the ACC. We found that only the N-type calcium channel blocker ω-conotoxin-GVIA (ω-Ctx-GVIA) produced a great inhibition of basal synaptic transmission, especially in the superficial layer. Other calcium channel blockers that act on L-, P/Q-, R-, and T-type had no effect. We also tested the effects of several neuromodulators with or without ω-Ctx-GVIA. We found that N-type VGCC contributed partially to (1S,3R)-1-aminocyclopentane-1,3-dicarboxylic acid- and (R)-Baclofen-induced synaptic inhibition. By contrast, the inhibitory effects of 2-Chloroadenosine and carbamoylcholine chloride did not differ with or without ω-Ctx-GVIA, indicating that they may act through other mechanisms. Our results provide strong evidence that N-type VGCCs mediate fast synaptic transmission in the ACC.
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