...
首页> 外文期刊>Neuron >Developmental Refinement of Vesicle Cycling at Schaffer Collateral Synapses
【24h】

Developmental Refinement of Vesicle Cycling at Schaffer Collateral Synapses

机译:Schaffer侧突触囊泡循环的发展提炼。

获取原文
获取原文并翻译 | 示例
           

摘要

At synapses formed between dissociated neurons, about half of all synaptic vesicles are refractory to evoked release, forming the so-called "resting pool." Here, we use optical measurements of vesicular pH to study developmental changes in pool partitioning and vesicle cycling in cultured hippocampal slices. Two-photon imaging of a genetically encoded two-color release sensor (ratio-sypHy) allowed us to perform calibrated measurements at individual Schaffer collateral boutons. Mature boutons released a large fraction of their vesicles during simulated place field activity, and vesicle retrieval rates were 7-fold higher compared to immature boutons. Saturating stimulation mobilized essentially all vesicles at mature synapses. Resting pool formation and a concomitant reduction in evoked release was induced by chronic depolarization but not by acute inhibition of the protein phosphatase calcineurin. We conclude that synapses in CA1 undergo a prominent refinement of vesicle use during early postnatal development that is not recapitulated in dissociated neuronal culture. ? 2013 Elsevier Inc.
机译:在离解的神经元之间形成的突触处,所有突触小泡中约有一半对诱发的释放是难治的,形成了所谓的“静息池”。在这里,我们使用光学测量的囊泡pH值来研究培养的海马切片中池分配和囊泡循环的发育变化。遗传编码的双色释放传感器(ratio-sypHy)的双光子成像使我们能够在各个Schaffer侧支纽扣上执行校准的测量。在模拟的场所活动期间,成熟的钮扣释放了大部分的囊泡,与未成熟的钮扣相比,囊泡的回收率高出7倍。饱和刺激在成熟突触处基本动员了所有囊泡。静息池的形成和伴随释放的减少是由慢性去极化引起的,而不是由蛋白磷酸酶钙调神经磷酸酶的急性抑制引起的。我们得出的结论是,CA1中的突触在出生后早期发育过程中经历了囊泡使用的显着改善,在分离的神经元培养中没有概括。 ? 2013爱思唯尔公司

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号