题名TORC1对海马突触传递长时程增强的调控
作者周杨
学位类别博士
答辩日期2007-10-19
授予单位中国科学院上海生命科学研究院
授予地点上海生命科学研究院
导师熊志奇
关键词神经元兴奋性 TORC1 核转位 CRE靶基因表达 L-LTP维持
其他题名Requirement of TORC1 for Late-phase Long-Term Potentiation in the Hippocampus
学位专业神经生物学
中文摘要突触传递的长时程增强和长时程记忆依赖神经元的基因转录和蛋白质合成。但突触信号如何传递到细胞核引起基因转录的机制并不清楚。本文报道了CREB的转录共激活因子TORC1在神经元中活动依赖的细胞核转位,及其对CRE靶基因表达和海马CA1区L-LTP的调节。我们的研究提示TORC1可能是维持海马突触传递长时程增强的重要因素。
英文摘要Late-phase long-term potentiation (L-LTP) and long-term memory depend on the transcription of mRNA of CRE-driven genes and synthesis of proteins. However, how synaptic signals propagate to the nucleus is unclear. Here we report that the CREB coactivator TORC1 (transducer of regulated CREB activity 1) undergoes neuronal activity-induced translocation from the cytoplasm to the nucleus, a process required for CRE-dependent gene expression and L-LTP. Overexpressing a dominant-negative form of TORC1 or down-regulating TORC1 expression prevented activity-dependent transcription of CREB target genes in cultured hippocampal neurons, while overexpressing a wild-type form of TORC1 facilitated basal and activity-induced transcription of CREB target genes. Furthermore, overexpressing the dominant-negative form of TORC1 suppressed the maintenance of L-LTP without affecting early-phase long-term potentiation, while overexpressing the wild-type form of TORC1 facilitated the induction of L-LTP in hippocampal slices. Our results indicate that TORC1 is essential for CRE-driven gene expression and maintenance of long-term synaptic potentiation.
语种中文
公开日期2013-01-05
页码88
内容类型学位论文
源URL[http://ir.sibs.ac.cn/handle/331001/2396]  
专题上海神经科学研究所_神经所(总)
推荐引用方式
GB/T 7714
周杨. TORC1对海马突触传递长时程增强的调控[D]. 上海生命科学研究院. 中国科学院上海生命科学研究院. 2007.
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