| Project/Area Number |
23500464
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Neurophysiology and muscle physiology
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| Research Institution | Niigata University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
NAWA Hiroyuki 新潟大学, 脳研究所, 教授 (50183083)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2011: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | ドパミン / 神経栄養因子 / ニューレグリン / 上皮成長因子 / スパイク発火特性 / 動物モデル / 統合失調症 / 生理特性 |
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| Research Abstract |
Neuregulin (NRG) and epidermal growth factor (EGF) have nerurotrophic activities on the midbrain dopaminergic neurons. These factors are implicated with the etiology of neuropsychiatric diseases, such as schizophrenia. NRG/EGF administered rodents during neonatal period exhibit behavioral abnormalities related with schizophrenia. Therefore, these animals are useful models to analyze the neuronal mechanisms underlying the pathophysiology. Slice patch-clamp analyzes of the dopaminergic neurons reveal that NRG or EGF attenuated synaptic inhibition or spike after-hyperpolarization mediated by a certain potassium current, respectively, both of which potentially enhance neural activity. In support of this, in vivo burst firing activity was enhanced under anesthetic condition in NRG or EGF administered animals. Thus, pathophysiological alterations of neuronal properties might participate in abnormal dopaminergic transmission and behavioral traits in the animal models for schizophrenia.
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