Reduced synaptic function of Kainate receptors in the insular cortex of Fmr1 Knock-out mice.
Reduced synaptic function of Kainate receptors in the insular cortex of Fmr1 Knock-out mice.
复制标题
Fmr1 敲除小鼠岛叶皮质中红藻氨酸受体突触功能降低
DOI:
10.1186/s13041-018-0396-1
复制
发表时间:
2018-09-21
期刊:
影响因子:
3.6
通讯作者:
Koga K
中科院分区:
文献类型:
--
作者:
Qiu S;Wu Y;Lv X;Li X;Zhuo M;Koga K
Fragile X syndrome is caused by the loss of fragile X mental retardation protein (FMRP). Kainate receptor (KAR) is a subfamily of ionotropic glutamate receptors (iGluR) that acts mainly as a neuromodulator of synaptic transmission and neuronal excitability. However, little is known about the changes of synaptic KAR in the cortical area of Fmr1 KO mice. In this study, we performed whole-cell patch-clamp recordings from layer II/III pyramidal neurons in the insular cortex of Fmr1 KO mice. We found that KARs mediated currents were reduced in Fmr1 KO mice. KARs were mainly located in the synaptosomal fraction of the insular cortex. The abundance of KAR subunit GluK1 and GluK2/3 in the synaptosome was reduced in Fmr1 KO mice, whereas the total expressions of these KARs subunits were not changed. Finally, lack of FMRP impairs subsequent internalization of surface GluK2 after KAR activation, while having no effect on the surface GluK2 expression. Our studies provide evidence indicating that loss of FMRP leads to the abnormal function and localization of KARs. This finding implies a new molecular mechanism for Fragile X syndrome.
登录
查看更多内容
影响因子:
4.8
作者:
Nasu-Nishimura, Yukiko;Jaffe, Howard;Roche, Katherine W.
通讯作者:
Roche, Katherine W.
影响因子:
64.8
作者:
Mulle, C;Sailer, A;Heinemann, SF
通讯作者:
Heinemann, SF
影响因子:
4.8
作者:
Lu, Wen;Fang, Weiqing;Yang, Wei
通讯作者:
Yang, Wei
影响因子:
5.3
作者:
Lu, Wen;Ai, Heng;Luo, Jian-hong
通讯作者:
Luo, Jian-hong
影响因子:
2.5
作者:
Koga, Kohei;Sim, Su-Eon;Zhuo, Min
通讯作者:
Zhuo, Min