鉴定一种囊泡性谷氨酸转运体,它定义了神经元中的谷氨酸类表型
S Takamori1, J S Rhee, C Rosenmund
1Department of Neurobiology, Max-Planck-Institute for Biophysical Chemistry, Göttingen, Germany.
Nature
|September 23, 2000
概括
大脑细胞使用囊泡性谷氨酸转运体来包装谷氨酸,这是主要的刺激性神经递质. 研究人员发现,表达BNPI使细胞内囊泡能够运输谷氨酸,从而定义了一个谷氨酸的表型.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 谷氨酸是哺乳动物中枢神经系统中的主要刺激性神经递质.
- 膀载体对于将神经递质装载到突触囊中至关重要.
研究的目的:
- 为了研究BNPI (囊泡结合的载体) 在谷氨酸吸收中的功能.
- 为了确定BNPI表达是否足以赋予一种谷氨酸性表型.
主要方法:
- 在细胞和神经元中表达的BNPI.
- 刺激的细胞外和测量谷氨酸释放.
- 利用谷氨酸和GABA受体对抗剂来分析后突触电流.
主要成果:
- BNPI表达导致谷氨酸被吸收到细胞内囊泡中,其特征与突触囊泡相似.
- 刺激BNPI表达细胞导致了量子谷氨酸释放.
- 谷氨酸,而不是GABA,介导了BNPI表达神经元中的突触后电流的一个组成部分.
结论:
- BNPI作为囊泡性谷氨酸转运体起作用.
- 对BNPI的表达足以在神经元中确定一种谷氨酸的表型.
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Properly folded and assembled proteins are selectively packaged into vesicles that exit the ER. Motor proteins transport these vesicles to the Golgi apparatus for adding modifications that make these proteins functional at their destination.
The Golgi apparatus is a eukaryotic organelle that has a distinctive ribbon-like appearance. It is a primary sorting and dispatch station for cargo arriving from the ER. Newly arriving vesicles enter the cis face of the Golgi, closest to the ER, and are...
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