Overexpression of cypin alters dendrite morphology, single neuron activity, and network properties via distinct mechanisms.
Overexpression of cypin alters dendrite morphology, single neuron activity, and network properties via distinct mechanisms.
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DOI:
10.1088/1741-2552/aa976a
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发表时间:
2018-03
影响因子:
4
通讯作者:
Firestein BL
中科院分区:
文献类型:
--
作者:
Rodríguez AR;O'Neill KM;Swiatkowski P;Patel MV;Firestein BL
This study investigates the effect that overexpression of cytosolic PSD-95 interactor (cypin), a regulator of synaptic PSD-95 protein localization and a core regulator of dendrite branching, exerts on the electrical activity of rat hippocampal neurons and networks. We cultured rat hippocampal neurons and used lipid-mediated transfection and lentiviral gene transfer to achieve high levels of cypin or cypin mutant (cypinΔPDZ; PSD-95 non-binding) expression cellularly and network-wide, respectively. Our analysis revealed that although overexpression of cypin and cypinΔPDZ increase dendrite numbers and decrease spine density, cypin and cypinΔPDZ distinctly regulate neuronal activity. At the single cell level, cypin promotes decreases in bursting activity while cypinΔPDZ reduces sEPSC frequency and further decreases bursting compared to cypin. At the network level, by using the Fano factor as a measure of spike count variability, cypin overexpression results in an increase in variability of spike count, and this effect is abolished when cypin cannot bind PSD-95. This variability is also dependent on baseline activity levels and on mean spike rate over time. Finally, our spike sorting data show that overexpression of cypin results in a more complex distribution of spike waveforms and that binding to PSD-95 is essential for this complexity. Our data suggest that dendrite morphology does not play a major role in cypin action on electrical activity.
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DOI:
10.1523/jneurosci.5465-11.2012
发表时间:
2012-06-20
期刊:
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子:
--
作者:
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通讯作者:
Davis GW
影响因子:
25
作者:
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通讯作者:
Smith SL
影响因子:
3.7
作者:
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通讯作者:
Pedrocchi A
DOI:
10.3389/fneng.2011.00014
发表时间:
2011
期刊:
Frontiers in neuroengineering
影响因子:
--
作者:
Fendyur A;Mazurski N;Shappir J;Spira ME
通讯作者:
Spira ME
影响因子:
2.5
作者:
Abolafia, Juan M.;Martinez-Garcia, M.;Sanchez-Vives, M. V.
通讯作者:
Sanchez-Vives, M. V.