Nanodomain Coupling at an Excitatory Cortical Synapse
Nanodomain Coupling at an Excitatory Cortical Synapse
复制标题
兴奋性皮质突触处的纳米域耦合
DOI:
10.1016/j.cub.2012.12.007
复制
发表时间:
2013
期刊:
影响因子:
9.2
通讯作者:
Eilers J
中科院分区:
文献类型:
--
作者:
Schmidt H;Brachtendorf S;Arendt O;Hallermann S;Ishiyama S;Bornschein G;Gall D;Schiffmann SN;Heckmann M;Eilers J
The coupling distance between presynaptic Ca2+influx and the sensor for vesicular transmitter release determines speed and reliability of synaptic transmission [1, 2]. Nanodomain coupling (<100 nm) favors fidelity [1, 2] and is employed by synapses specialized for escape reflexes [3] and by inhibitory synapses involved in synchronizing fast network oscillations [1]. Cortical glutamatergic synapses seem to forgo the benefits of tight coupling [4–6], yet quantitative detail is lacking [2, 7]. The reduced transmission fidelity of loose coupling, however, raises the question whether it is indeed a general characteristic of cortical synapses. Here we analyzed excitatory parallel fiber to Purkinje cell synapses, major processing sites for sensory information [8] and well suited for analysis because they typically harbor only a single active zone [9]. We quantified the coupling distance by combining multiprobability fluctuation analyses, presynaptic Ca2+imaging, and reaction-diffusion simulations in wild-type and calretinin-deficient mice. We found a coupling distance of <30 nm at these synapses, much shorter than at any other glutamatergic cortical synapse investigated to date. Our results suggest that nanodomain coupling is a general characteristic of conventional cortical synapses involved in high-frequency transmission, allowing for dense gray matter packing and cost-effective neurotransmission.
登录
查看更多内容
DOI:
10.1523/jneurosci.17-04-01206.1997
发表时间:
1997
期刊:
The Journal of Neuroscience
影响因子:
--
作者:
F. Berton;C. Iborra;J. Boudier;M. Seagar;B. Marquèze
通讯作者:
B. Marquèze
影响因子:
5.3
作者:
Meinrenken, CJ;Borst, JGG;Sakmann, B
通讯作者:
Sakmann, B
DOI:
10.1152/jn.01289.2004
发表时间:
2005
期刊:
Journal of neurophysiology.
影响因子:
--
作者:
KingJr,JDarwin;Meriney,StephenD
通讯作者:
Meriney,StephenD
影响因子:
34.7
作者:
Eggermann, Emmanuel;Bucurenciu, Iancu;Goswami, Sarit Pati;Jonas, Peter
通讯作者:
Jonas, Peter
影响因子:
5.5
作者:
Rozov, A;Burnashev, N;Neher, E
通讯作者:
Neher, E