Distinct Expression of SLM2 Underlies Splicing-Dependent Trans-Synaptic Signaling of Neurexin Across GABAergic Neuron Subtypes
Distinct Expression of SLM2 Underlies Splicing-Dependent Trans-Synaptic Signaling of Neurexin Across GABAergic Neuron Subtypes
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SLM2 的独特表达是 GABA 能神经元亚型中 Neurexin 剪接依赖性跨突触信号传导的基础
DOI:
10.1007/s11064-021-03384-0
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发表时间:
2022
影响因子:
4.4
通讯作者:
Iijima Takatoshi
中科院分区:
文献类型:
--
作者:
Sato Yuji;Iijima Yoko;Darwish Mohamed;Sato Tadayuki;Iijima Takatoshi
The mammalian brain contains multiple types of neuronal cells with complex assemblies and distinct structural and functional properties encoded by divergent gene programs. There is increasing evidence that alternative splicing (AS) plays fundamental roles in transcriptomic diversity and specifying synaptic properties of each neuronal cell type. However, the mechanisms underlying AS regulation and whether it controls synapse formation across GABAergic interneurons have not been fully elucidated. Here we show the differential expression levels of Sam68-like molecule 2 (SLM2), a major splicing regulator of neurexin (NRX), in GABAergic neuronal subtypes and its contribution to GABAergic synapse specification. Cortical SLM2 is strongly expressed not only in excitatory neurons but also in a subpopulation of GABAergic interneurons, especially in VIP-positive neurons that are originated from late-born caudal ganglionic eminence (GE)- derived cells. Using artificial synapse formation assay, we found that GE containing cortices form a strong synapse with LRRTM2, a trans-synaptic receptor of the alternatively spliced segment 4 (AS4)(−) of NRX. SLM2 knock-down reduced the NRX AS4(−) isoform expression and hence weaken LRRTM2-induced synapse formation. The addition of NRX AS4(−) was sufficient to rescue the synaptic formation by LRRTM2 in SLM2 knock-down neurons. Thus, our findings suggest a novel function of SLM2 in modifying network formation of a specific population of GABAergic interneurons and contribute to a better understanding of the roles AS plays in regulating synapse specificity and neuronal molecular diversity.
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DOI:
10.1523/jneurosci.0470-10.2010
发表时间:
2010-06-02
期刊:
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子:
--
作者:
Siddiqui TJ;Pancaroglu R;Kang Y;Rooyakkers A;Craig AM
通讯作者:
Craig AM
影响因子:
7.7
作者:
Thi;D. Schreiner;Le Xiao;Lisa Traunmüller;C. Bornmann;P. Scheiffele
通讯作者:
P. Scheiffele
影响因子:
64.5
作者:
Uemura T;et al.
通讯作者:
et al.
DOI:
10.1523/jneurosci.3395-14.2014
发表时间:
2014
期刊:
The Journal of Neuroscience
影响因子:
--
作者:
Lisa Traunmüller;C. Bornmann;P. Scheiffele
通讯作者:
P. Scheiffele
影响因子:
4.7
作者:
M. Missler;R. Fernández-Chacón;T. Südhof
通讯作者:
M. Missler;R. Fernández-Chacón;T. Südhof