Mfsd2aは,オメガ3脂肪酸であるドコサヘキサエノ酸のトランスポーターです
Long N Nguyen1, Dongliang Ma2, Guanghou Shui3
1Signature Research Program in Cardiovascular and Metabolic Disorders, Duke-NUS Graduate Medical School Singapore, 8 College Road, 169857 Singapore.
Nature
|May 16, 2014
まとめ
2a (Mfsd2a) タンパク質を含むメジャーファシリテータースーパーファミリードメインは,脳へのドコサヘキサエノ酸 (DHA) 吸収の主なトランスポーターとして特定されています. この発見は,Mfsd2aが脳の発達と機能における重要な役割を明らかにしています.
科学分野:
- 神経科学は神経科学である.
- 分子生物学は分子生物学である.
- バイオケミストリー バイオケミストリー
背景:
- オメガ3脂肪酸であるドコサヘキサエノ酸 (DHA) は,脳の成長と認知機能に不可欠です.
- DHAは脳のリン脂質に高度に濃縮されているが,脳内では新たに合成できないため,血脳障壁を通過して輸送する必要がある.
- 脳へのDHAの吸収を制御するメカニズムは,ほとんど未知のままです.
研究 の 目的:
- ドコサヘキサエノ酸 (DHA) の脳への吸収に責任を負う主要なトランスポーターを特定する.
- 血液脳壁を越えてDHAの輸送のメカニズムと生理学的意義を解明する.
主な方法:
- 生物情報学と発現分析を用いて,Mfsd2aを潜在的トランスポーターとして特定.
- Mfsd2aノックアウトマウスの生成と分析により,DHAレベルと神経機能の評価が行われました.
- Mfsd2a.a.の輸送基質とメカニズムを決定するための細胞ベースのインビトロ測定法.
- ノックアウトと野生型のマウスの脳組織の脂質解析.
主要な成果:
- Mfsd2aは,脳へのDHA吸収の主なトランスポーターとして特定され,血液脳障壁の内皮にのみ発現した.
- Mfsd2aのノックアウトマウスは,脳のDHAレベルが著しく低下し,神経細胞の喪失,認知機能の欠陥,および小頭症を示した.
- Mfsd2aは,リソファスファティディルコリン (LPC) の形でDHAを輸送することが判明しました,特にLPCは14炭素以上のアシル鎖を持ち,ナトリウムに依存した方法で輸送します.
- LPCのリン-ツウィテリオンヘッドグループは,Mfsd2a媒介による輸送に決定的であった.
結論:
- Mfsd2aは,ライソファスファティディルコリンに結合したDHAの脳への吸収を媒介する不可欠なトランスポーターです.
- Mfsd2aは,脳の発達,神経の完全性,および認知機能において重要な役割を果たします.
- 血由来のリソファスファティディルコリンは,脳の成長と機能に不可欠であり,Mfsd2aが主要な媒介体である.
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