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诺贝尔奖讲座系列: 神经元突触形成的分子结构

会议/讲座

  • 日期

    2023年12月13日

  • 主办单位

    Mental Health Research Centre

  • 时间

    17:00 - 18:30

  • 地点

    Zoom线上平台  

讲者

托马斯·聚德霍夫博士

备注

公众开放

MHRC Nobel Laureate Lecture202312131 1000 x 1500 pxSC

摘要

大脑以神经回路中的平行、交错或顺序等讯号以传递讯息。 在每个神经回路中,讯息透过突触从一个神经元传递到下一个神经元。突触在传递讯息中同时进行计算,根据其特性将突触前脉冲编码转换为不同的突触后讯号。

神经回路的讯息处理差异十分大,原因在于其很大程度上依赖所组成神经元之间突触的数量,位置以及突触的计算特性。

我们认为神经回路的突触结构是基于一种分子逻辑以控制着突触的建立和功能规格。我们亦认为这种分子逻辑是由突触前和突触后的识别分子和传讯分子之间形成的跨突触黏附复合物所控制。

有助于神经回路分子逻辑的多种细胞表面和传讯分子已被特征化。

两种复合物调解了跨突触相互联系以控制突触结构突出:突触前神经素黏附分子连同多种类的突触后传讯,包括neurexin(神经跨膜蛋白)和cerebellins(小脑蛋白),以及突触后latrophilins(亲肌蛋白)和 Bai’s,在突触形成过程中充当黏附GPCRs (G蛋白偶联受体),并与突触前配体teneurins (跨膜蛋白质) 和 RTN4R (网状蛋白4受体)相互作用。

在是次演讲中,我将会介绍选定的跨突触交互作用如何指导和塑造突触的形成从而控制神经回路的分子逻辑。 鉴于资料的丰富性,演讲中只会重点介绍某些例子,有意获取更多信息的听众欢迎查阅我们更多的出版刊物。

讲者

托马斯·聚德霍夫博士

史丹佛医学院神经病学和神经科学及精神病学和行为科学系礼任教授

Thomas Christian Südhof was born in Göttingen, Germany, on Dec. 22 in 1955, obtained his M.D. and doctoral degrees from the University of Göttingen in 1982. He performed his doctoral thesis work at the Max-Planck-Institut für biophysikalische Chemie in Göttingen with Prof. Victor P. Whittaker on the biophysical structure of secretory granules. From 1983-1986, Südhof trained as a postdoctoral fellow with Drs. Mike Brown and Joe Goldstein at UT Southwestern in Dallas, TX, and elucidated the structure, expression and cholesterol-dependent regulation of the LDL receptor gene. Südhof began his independent career as an assistant professor at UT Southwestern in 1986. When Südhof started his laboratory, he decided to switch from cholesterol metabolism to neuroscience, and to pursue a molecular characterization of synaptic transmission. His work initially focused on the mechanism of neurotransmitter release which is the first step in synaptic transmission, and whose molecular basis was completely unknown in 1986. Later on, Südhof's work increasingly turned to the analysis of synapse formation and specification, processes that mediate the initial assembly of synapses, regulate their maintenance and elimination, and determine their properties. Südhof served on the faculty of UT Southwestern in Dallas until 2008, and among others was the founding chair of the Department of Neuroscience at that institution. In 2008, Südhof moved to Stanford, and became the Avram Goldstein Professor in the School of Medicine at Stanford University. In addition, Südhof has been an Investigator of the Howard Hughes Medical Institute since 1986.

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