Distinct in vivo dynamics of excitatory synapses onto cortical pyramidal neurons and parvalbumin-positive interneurons.
Distinct in vivo dynamics of excitatory synapses onto cortical pyramidal neurons and parvalbumin-positive interneurons.
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皮层锥体神经元和小蛋白阳性中间神经元上兴奋性突触的不同体内动态。
DOI:
10.1016/j.celrep.2021.109972
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发表时间:
2021-11-09
期刊:
影响因子:
8.8
通讯作者:
Zhong H
中科院分区:
文献类型:
--
作者:
Melander JB;Nayebi A;Jongbloets BC;Fortin DA;Qin M;Ganguli S;Mao T;Zhong H
Cortical function relies on the balanced activation of excitatory and inhibitory neurons. However, little is known about the organization and dynamics of shaft excitatory synapses onto cortical inhibitory interneurons. Here, we use the excitatory postsynaptic marker PSD-95, fluorescently labeled at endogenous levels, as a proxy for excitatory synapses onto layer 2/3 pyramidal neurons and parvalbumin-positive (PV+) interneurons in the barrel cortex of adult mice. Longitudinal in vivo imaging under baseline conditions reveals that, although synaptic weights in both neuronal types are log-normally distributed, synapses onto PV+ neurons are less heterogeneous and more stable. Markov model analyses suggest that the synaptic weight distribution is set intrinsically by ongoing cell-type-specific dynamics, and substantial changes are due to accumulated gradual changes. Synaptic weight dynamics are multiplicative, i.e., changes scale with weights, although PV+ synapses also exhibit an additive component. These results reveal that cell-type-specific processes govern cortical synaptic strengths and dynamics. Melander et al. use a genetic strategy to visualize excitatory neuronal connections that cannot be inferred from morphology, and they monitor how the connections change over weeks in mice. They find distinct characteristics between synapses onto cells that “suppress” brain activity and those onto cells that “excite” brain activity.
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影响因子:
64.8
作者:
Hayashi-Takagi A;Yagishita S;Nakamura M;Shirai F;Wu YI;Loshbaugh AL;Kuhlman B;Hahn KM;Kasai H
通讯作者:
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影响因子:
16.2
作者:
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DOI:
10.1073/pnas.0811025106
发表时间:
2008-12-30
影响因子:
11.1
作者:
Elias, G. M.;Elias, L. A. B.;Nicoll, R. A.
通讯作者:
Nicoll, R. A.
影响因子:
9.8
作者:
通讯作者:
--
影响因子:
25
作者:
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通讯作者:
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