ドーパミニル化ヒストンH3は,腹膜領域におけるコカイン探求を調節する
Ashley E Lepack1, Craig T Werner2, Andrew F Stewart1
1Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
まとめ
コカイン中毒は ヒストンの改変によって 脳の遺伝子発現を変化させます 腹部タグメンタル領域 (VTA) のヒストンH3グルタミン5ドパミニレーション (H3Q5dop) の減少は,これらの変化を逆転させ,コカイン探求を減少させた.
科学分野:
- 神経科学
- 分子生物学
- 依存症 研究
背景:
- コカイン中毒は脳の報酬経路の変化と関連しており,特に腹部テグメンタル領域 (VTA) のドーパミンニューロンはそうである.
- コカインが中脳ドーパミンニューロンの 遺伝子発現を変化させ 中脳ドーパミンニューロンの 遺伝子発現を変化させ 中脳ドーパミンの 遺伝子発現を変化させ 中脳ドーパミンの 遺伝子発現を変化させ 中脳ドーパミンの 遺伝子発現を変化させ 中脳ドーパミンの 遺伝子発現を変化させ 中脳ドーパミンの 遺伝子発現を変化させ 中脳ドーパミンの 遺伝子発現を変化させ 中脳ドーパミンの
研究 の 目的:
- 中脳におけるコカイン誘発の転写変化におけるヒストンの変化の役割を調査する.
- ヒストンH3グルタミン5ドパミニル化 (H3Q5dop) がコカイン中毒と再発行動に関与しているかどうかを判断する.
主な方法:
- ネズミのコカイン離脱モデルを使って
- ヒストンH3グルタミン5ドパミニル化 (H3Q5dop) レベルをVTAで測定した.
- 離脱期間中にVTAでH3Q5dopを減らすための介入を行った.
- 遺伝子発現の変化,ドーパミンの放出, コカイン探しの行動
主要な成果:
- コカインの離脱はVTAにおけるH3Q5dopの蓄積を増加させた.
- VTAにおけるH3Q5dopの減少は,コカインに関連した遺伝子発現の変化を逆転させた.
- ドーパミンの放出を弱め コカイン探求の行動を減少させました
結論:
- ヒストンH3グルタミン5ドパミニル化 (H3Q5dop) は,VTAにおけるコカイン誘発の転写性可塑性にとって極めて重要です.
- 核ドーパミンは神経伝達から独立して 依存症に関連する遺伝子発現と再発行動に 重要な役割を果たします
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