2005 Fiscal Year Final Research Report Summary
Studies on the activity-dependent translational control in neurons
| Project/Area Number |
15300122
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Neurochemistry/Neuropharmacology
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| Research Institution | Niigata University |
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Principal Investigator |
TAKEI Nobuyuki Niigata University, Brain Research Institute, Associate Professor, 脳研究所, 助教授 (70221372)
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| Project Period (FY) |
2003 – 2005
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| Keywords | neuron / translational control / BDNF / mTOR / local protein synthesis / neural plasticity / LTP / spatial learning |
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| Research Abstract |
Activity-dependent local translation at the perisynaptic area is implicated in synapse-wide alterations of function and morphology. The molecular mechanisms of local translation activation, however, have yet to be illuminated. We have shown that local protein synthesis and translational activation in neuronal dendrites were up-regulated by brain-derived neurotrophic factor (BDNF) in a rapamycin-sensitive manner. In parallel, BDNF activates of mammalian target of rapamycin (mTOR) signaling pathways in dendrites. BDNF also enhances elongation process through the mTOR pathway. Inhibition of mTOR activity by rapamycin and knockdown of mTOR by siRNA completely suppresses the action of BDNF.
The present results indicate that mTOR-dependent translation activation at multiple processes is essential for the up-regulation of local protein synthesis in neuronal dendrites. We further showed the evidences that mTOR-dependent translational activation occurred during plastic event, such as LTP and spatial memory paradigms in the CNS. As rapamycin canceled these effects, mTOR-dependent translational activation is essential for the certain types of neural plasticity.
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[Journal Article] Brain-derived neurotrophic factor induces mammalian target of rapamycin-dependent local activation of translation machinery and protein synthesis in neuronal dendrites2004
Author(s)
Takei, N., Inamura, N., Kawamura, M., Namba, H., Hara, K., Yonezawa, K., Nawa, H.
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Journal Title
J.Neurosci. 24
Pages: 9760-9769
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Phosphatidylinositol 3-kinase : a molecule mediating BDNF-dependent spatial memory formation.2003
Author(s)
Mizuno, M., Yamada, K., Takei, N., Tran, M.H., He, J., Nakajima, A., Nawa, H., Nabeshima, T.
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Journal Title
Mol.Psychiatry. 8
Pages: 217-224
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Differential Distributions of Translation Initiation, Elongation and Release Factors in Rat Hippocampus.2003
Author(s)
Inamura, N., Hoshino, S., Uchiumi, T., Nawa, H., Takei, N.
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Journal Title
Mol.Brain Res. 111
Pages: 165-174
Description
「研究成果報告書概要(欧文)」より
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