Abstract

Kainate receptors (KARs) are one of the ionotropic glutamate receptors in the central nervous system (CNS) comprised of five subunits, GluK1-GluK5. There is a growing interest in the association between KARs and psychiatric disorders, and there have been several studies investigating the behavioral phenotypes of KAR deficient mice, however, the difference in the genetic background has been found to affect phenotype in multiple mouse models of human diseases. Here, we examined GluK1-5 single KO mice in a pure C57BL/6N background and identified that GluK3 KO mice specifically express anxiolytic-like behavior with an alteration in dopamine D2 receptor (D2R)-induced anxiety, and reduced D2R expression in the striatum. Biochemical studies in the mouse cortex confirmed that GluK3 subunits do not assemble with GluK4 and GluK5 subunits, that can be activated by lower concentration of agonists. Overall, we found that GluK3-containing KARs function to express anxiety, which may represent promising anti-anxiety medication targets.

Details

Title
Behavioral analysis of kainate receptor KO mice and the role of GluK3 subunit in anxiety
Author
Iida, Izumi 1 ; Konno, Kohtarou 2 ; Natsume, Rie 3 ; Abe, Manabu 3 ; Watanabe, Masahiko 2 ; Sakimura, Kenji 3 ; Terunuma, Miho 4 

 Niigata University, Division of Oral Biochemistry, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata, Japan (GRID:grid.260975.f) (ISNI:0000 0001 0671 5144); Niigata University, Research Center for Advanced Oral Science, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata, Japan (GRID:grid.260975.f) (ISNI:0000 0001 0671 5144); The University of Tokyo, Department of Life Sciences, Graduate School of Arts and Sciences, Tokyo, Japan (GRID:grid.26999.3d) (ISNI:0000 0001 2151 536X) 
 Hokkaido University, Department of Anatomy, Faculty of Medicine, Sapporo, Japan (GRID:grid.39158.36) (ISNI:0000 0001 2173 7691) 
 Niigata University, Department of Animal Model Development, Brain Research Institute, Niigata, Japan (GRID:grid.260975.f) (ISNI:0000 0001 0671 5144) 
 Niigata University, Division of Oral Biochemistry, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata, Japan (GRID:grid.260975.f) (ISNI:0000 0001 0671 5144) 
Pages
4521
Publication year
2024
Publication date
2024
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2931205000
Copyright
© The Author(s) 2024. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.