Array tomography of physiologically-characterized CNS synapses.
Array tomography of physiologically-characterized CNS synapses.
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DOI:
10.1016/j.jneumeth.2016.04.017
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发表时间:
2016-08-01
影响因子:
3
通讯作者:
Madison DV
中科院分区:
文献类型:
--
作者:
Valenzuela RA;Micheva KD;Kiraly M;Li D;Madison DV
The ability to correlate plastic changes in synaptic physiology with changes in synaptic anatomy has been very limited in the central nervous system because of shortcomings in existing methods for recording the activity of specific CNS synapses and then identifying and studying the same individual synapses on an anatomical level. We introduce here a novel approach that combines two existing methods: paired neuron electrophysiological recording and array tomography, allowing for the detailed molecular and anatomical study of synapses with known physiological properties. The complete mapping of a neuronal pair allows determining the exact number of synapses in the pair and their location. We have found that the majority of close appositions between the presynaptic axon and the postsynaptic dendrite in the pair contain synaptic specializations. The average release probability of the synapses between the two neurons in the pair is low, below 0.2, consistent with previous studies of these connections. Other questions, such as receptor distribution within synapses, can be addressed more efficiently by identifying only a subset of synapses using targeted partial reconstructions. In addition, time sensitive events can be captured with fast chemical fixation. Compared to existing methods, the present approach is the only one that can provide detailed molecular and anatomical information of electrophysiologically-characterized individual synapses. This method will allow for addressing specific questions about the properties of identified CNS synapses, even when they are buried within a cloud of millions of other brain circuit elements.
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DOI:
10.1523/jneurosci.3106-06.2006
发表时间:
2006-11-29
期刊:
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子:
--
作者:
Biró AA;Holderith NB;Nusser Z
通讯作者:
Nusser Z
影响因子:
64.8
作者:
GULYAS, AI;MILES, R;FREUND, TF
通讯作者:
FREUND, TF
影响因子:
25
作者:
Choi, S;Klingauf, J;Tsien, RW
通讯作者:
Tsien, RW
影响因子:
5.5
作者:
Emond, Michelle R.;Montgomery, Johanna M.;Madison, Daniel V.
通讯作者:
Madison, Daniel V.
影响因子:
5.5
作者:
De Simoni, A;Griesinger, CB;Edwards, FA
通讯作者:
Edwards, FA