Calstabin 2: An important regulator for learning and memory in mice

Calstabin2, also named FK506 binding protein 12.6 (FKBP12.6), is a subunit of ryanodine receptor subtype 2 (RyR2) macromolecular complex, which is an intracellular calcium channel and abundant in the brain. Previous studies identified a role of leaky neuronal RyR2 in posttraumatic stress disorder (P...

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Veröffentlicht in:Scientific reports 2016-02, Vol.6 (1), p.21087-21087, Article 21087
Hauptverfasser: Yuan, Qi, Deng, Ke-Yu, Sun, Le, Chi, Shaopeng, Yang, Zhiguang, Wang, Jun, Xin, Hong-Bo, Wang, Xiaoqun, Ji, Guangju
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container_title Scientific reports
container_volume 6
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Deng, Ke-Yu
Sun, Le
Chi, Shaopeng
Yang, Zhiguang
Wang, Jun
Xin, Hong-Bo
Wang, Xiaoqun
Ji, Guangju
description Calstabin2, also named FK506 binding protein 12.6 (FKBP12.6), is a subunit of ryanodine receptor subtype 2 (RyR2) macromolecular complex, which is an intracellular calcium channel and abundant in the brain. Previous studies identified a role of leaky neuronal RyR2 in posttraumatic stress disorder (PTSD). However, the functional role of Calstabin2 in the cognitive function remains unclear. Herein, we used a mouse model of genetic deletion of Calstabin2 to investigate the function of Calstabin2 in cognitive dysfunction. We found that Calstabin2 knockout (KO) mice showed significantly reduced performance in Morris Water Maze (MWM), long-term memory (LTM) contextual fear testing and rotarod test when compared to wild type (WT) littermates. Indeed, genetic deletion of Calstabin2 reduced long-term potentiation (LTP) at the hippocampal CA3-CA1 connection, increased membrane excitability and induced RyR2 leak. Finally, we demonstrated that the increase in cytoplasmic calcium activated Ca 2+ dependent potassium currents and led to neuronal apoptosis in KO hippocampal neurons. Thus, these results suggest that neuronal RyR2 Ca 2+ leak due to Calstabin2 deletion contributes to learning deficiency and memory impairment.
doi_str_mv 10.1038/srep21087
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Previous studies identified a role of leaky neuronal RyR2 in posttraumatic stress disorder (PTSD). However, the functional role of Calstabin2 in the cognitive function remains unclear. Herein, we used a mouse model of genetic deletion of Calstabin2 to investigate the function of Calstabin2 in cognitive dysfunction. We found that Calstabin2 knockout (KO) mice showed significantly reduced performance in Morris Water Maze (MWM), long-term memory (LTM) contextual fear testing and rotarod test when compared to wild type (WT) littermates. Indeed, genetic deletion of Calstabin2 reduced long-term potentiation (LTP) at the hippocampal CA3-CA1 connection, increased membrane excitability and induced RyR2 leak. Finally, we demonstrated that the increase in cytoplasmic calcium activated Ca 2+ dependent potassium currents and led to neuronal apoptosis in KO hippocampal neurons. 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Previous studies identified a role of leaky neuronal RyR2 in posttraumatic stress disorder (PTSD). However, the functional role of Calstabin2 in the cognitive function remains unclear. Herein, we used a mouse model of genetic deletion of Calstabin2 to investigate the function of Calstabin2 in cognitive dysfunction. We found that Calstabin2 knockout (KO) mice showed significantly reduced performance in Morris Water Maze (MWM), long-term memory (LTM) contextual fear testing and rotarod test when compared to wild type (WT) littermates. Indeed, genetic deletion of Calstabin2 reduced long-term potentiation (LTP) at the hippocampal CA3-CA1 connection, increased membrane excitability and induced RyR2 leak. Finally, we demonstrated that the increase in cytoplasmic calcium activated Ca 2+ dependent potassium currents and led to neuronal apoptosis in KO hippocampal neurons. Thus, these results suggest that neuronal RyR2 Ca 2+ leak due to Calstabin2 deletion contributes to learning deficiency and memory impairment.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>26888649</pmid><doi>10.1038/srep21087</doi><tpages>1</tpages><oa>free_for_read</oa></addata></record>
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subjects 13/2
13/31
14/19
14/34
631/378/1595/1554
64/110
64/60
692/617/375
9/30
Animals
Apoptosis
Calcium (intracellular)
Calcium channels
Calcium currents
Cognitive ability
Excitability
Hippocampus
Hippocampus - cytology
Hippocampus - metabolism
Humanities and Social Sciences
Leak channels
Learning
Long term memory
Long-term potentiation
Long-Term Potentiation - physiology
Macromolecules
Maze Learning - physiology
Memory
Memory - physiology
Mice
Mice, Knockout
multidisciplinary
Post traumatic stress disorder
Potassium currents
Rodents
Ryanodine receptors
Science
Tacrolimus
Tacrolimus Binding Proteins - genetics
Tacrolimus Binding Proteins - metabolism
Tacrolimus-binding protein
title Calstabin 2: An important regulator for learning and memory in mice
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