A Critical Role for γCaMKII in Decoding NMDA Signaling to Regulate AMPA Receptors in Putative Inhibitory Interneurons.
10.1007/s12264-022-00840-x
- Author:
Xingzhi HE
1
;
Yang WANG
1
;
Guangjun ZHOU
1
;
Jing YANG
1
;
Jiarui LI
1
;
Tao LI
1
;
Hailan HU
1
;
Huan MA
2
Author Information
1. Department of Neurobiology, Affiliated Mental Health Center and Hangzhou Seventh People's Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China.
2. Department of Neurobiology, Affiliated Mental Health Center and Hangzhou Seventh People's Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China. mah@zju.edu.cn.
- Publication Type:Journal Article
- Keywords:
AMPAR;
Inhibitory interneurons;
LTP;
NMDAR;
Synaptic plasticity;
γCaMKII
- MeSH:
Calcium-Calmodulin-Dependent Protein Kinase Type 2/metabolism*;
Hippocampus/metabolism*;
Interneurons/physiology*;
Long-Term Potentiation/physiology*;
N-Methylaspartate/metabolism*;
Receptors, AMPA/physiology*;
Receptors, N-Methyl-D-Aspartate/metabolism*;
Synapses/physiology*
- From:
Neuroscience Bulletin
2022;38(8):916-926
- CountryChina
- Language:English
-
Abstract:
CaMKII is essential for long-term potentiation (LTP), a process in which synaptic strength is increased following the acquisition of information. Among the four CaMKII isoforms, γCaMKII is the one that mediates the LTP of excitatory synapses onto inhibitory interneurons (LTPE→I). However, the molecular mechanism underlying how γCaMKII mediates LTPE→I remains unclear. Here, we show that γCaMKII is highly enriched in cultured hippocampal inhibitory interneurons and opts to be activated by higher stimulating frequencies in the 10-30 Hz range. Following stimulation, γCaMKII is translocated to the synapse and becomes co-localized with the postsynaptic protein PSD-95. Knocking down γCaMKII prevents the chemical LTP-induced phosphorylation and trafficking of AMPA receptors (AMPARs) in putative inhibitory interneurons, which are restored by overexpression of γCaMKII but not its kinase-dead form. Taken together, these data suggest that γCaMKII decodes NMDAR-mediated signaling and in turn regulates AMPARs for expressing LTP in inhibitory interneurons.
