人間のNPY発現における遺伝的変異は,ストレス反応と感情に影響する
Zhifeng Zhou1, Guanshan Zhu, Ahmad R Hariri
1Laboratory of Neurogenetics, NIAAA, NIH, Bethesda, Maryland 20892, USA.
Nature
|April 4, 2008
まとめ
ニューロペプチドY (NPY) の遺伝的変異は,個人がストレスや感情的な課題にどのように反応するかに影響します. 低NPY発現は,不安の増大と脳の活動の変化と関連しており,ストレスに対する回復力に影響を及ぼします.
科学分野:
- 神経科学は神経科学である.
- 遺伝学 遺伝学とは
- 精神科医は精神病を患っている.
背景:
- ストレス反応における個々の差異は,行動や脳の代謝に影響を与える遺伝的要因の影響を受けます.
- ニューロペプチドY (NPY) は,抗不安性を持つ重要な神経伝達物質で,ストレス中に放出され,感情に関連した脳の領域に豊富に含まれています.
研究 の 目的:
- 感情的およびストレスの課題に対する脳の反応を予測するNPY遺伝的変異 (ハプロタイプ) の役割を調査する.
- NPYハプロタイプ,NPY発現レベル,特質不安の間の相関性を調査する.
主な方法:
- 死後の脳組織とリンパ芽細胞におけるNPYメッセンジャーRNA (mRNA) レベルの分析.
- 血NPYレベルを測定する.
- 感情的およびストレス刺激に反応する脳活性化パターン (桃体,オピオイド神経伝達) の評価.
- NPYプロモーター領域における特定の単一ヌクレオチドポリモルフィズム (SNP rs16147) のインビトロおよびインビボ分析.
主要な成果:
- NPYハプロタイプは,脳とプラズマにおけるNPY発現レベルを正確に予測しました.
- 低いNPY発現は,感情的刺激に対する桃体活性化の増加と相関する.
- 減少したNPY発現は,変化した内生性オピオイドシステムの活性化によって示される,減少したストレスレジリエンスと関連していました.
結論:
- ハプロタイプ主導のNPY発現は,ストレス反応と不安レベルにおける個々の差異の有意な予測因子です.
- この発見は,ストレスに対する回復力の遺伝的基盤と,病気のリスクに対するその影響を明らかにしています.
- NPYプロモーター領域の特定のSNP (rs16147) は,NPY発現に大きく影響し,in vivoの変動の大部分を説明する可能性がある.
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