Dopamine Secretion Is Mediated by Sparse Active Zone-like Release Sites.
Dopamine Secretion Is Mediated by Sparse Active Zone-like Release Sites.
复制标题
DOI:
10.1016/j.cell.2018.01.008
复制
发表时间:
2018-02-08
期刊:
影响因子:
64.5
通讯作者:
Kaeser PS
中科院分区:
文献类型:
--
作者:
Liu C;Kershberg L;Wang J;Schneeberger S;Kaeser PS
Dopamine controls essential brain functions through volume transmission. Different from fast synaptic transmission, where neurotransmitter release and receptor activation are tightly coupled by an active zone, dopamine transmission is widespread and may not necessitate these organized release sites. Here, we determine whether striatal dopamine secretion employs specialized machinery for release. Using superresolution microscopy, we identified co-clustering of the active zone scaffolding proteins bassoon, RIM and ELKS in ~30% of dopamine varicosities. Conditional RIM knockout disrupted this scaffold and, unexpectedly, abolished dopamine release, while ELKS knockout had no effect. Optogenetic experiments revealed that dopamine release was fast and had a high release probability, indicating the presence of protein scaffolds for coupling Ca2+-influx to vesicle fusion. Hence, dopamine secretion is mediated by sparse, mechanistically specialized active zone-like release sites. This architecture supports spatially and temporally precise coding for dopamine and provides molecular machinery for regulation. Secretion of dopamine requires specialized release machinery
登录
查看更多内容
影响因子:
3.4
作者:
Lin, John Y.;Lin, Michael Z.;Tsien, Roger Y.
通讯作者:
Tsien, Roger Y.
影响因子:
5.3
作者:
Liu, Changliang;Bickford, Lydia S.;Kaeser, Pascal S.
通讯作者:
Kaeser, Pascal S.
影响因子:
25
作者:
Brichta, Lars;Shin, William;Greengard, Paul
通讯作者:
Greengard, Paul
影响因子:
16.2
作者:
Han Y;Kaeser PS;Südhof TC;Schneggenburger R
通讯作者:
Schneggenburger R
影响因子:
5.5
作者:
Brimblecombe, Katherine R.;Gracie, Caitlin J.;Cragg, Stephanie J.
通讯作者:
Cragg, Stephanie J.