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Removal of FKBP12 enhances mTOR-Raptor interactions, LTP, memory, and perseverative/repetitive behavior
Charles A Hoeffer1, Wei Tang, Helen Wong
1Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX 77030, USA.
FKBP12 gene disruption enhances brain mTOR signaling, leading to improved synaptic plasticity and memory in mice. This suggests FKBP12 is crucial for regulating memory and related behaviors.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- FKBP12 binds immunosuppressants and regulates mTOR signaling.
- Understanding FKBP12's role in brain function is essential.
Purpose of the Study:
- To investigate the impact of brain-specific FKBP12 gene disruption on mTOR signaling, synaptic plasticity, and memory in mice.
Main Methods:
- Biochemical analysis of mTOR pathway components.
- Electrophysiological recordings of hippocampal long-term potentiation (LTP).
- Behavioral testing including contextual fear memory and reversal learning tasks.
Main Results:
- FKBP12 deficiency increased basal mTOR phosphorylation and mTOR-Raptor interactions.
- Enhanced hippocampal LTP was observed in FKBP12-deficient mice.
- Mice showed improved contextual fear memory and perseverative behaviors.
Conclusions:
- FKBP12 plays a critical role in regulating mTOR signaling, synaptic plasticity, and memory.
- Altered translation control may underlie enhanced synaptic plasticity.
- FKBP12 is implicated in the modulation of memory and perseverative behaviors.
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