メラノサイトにおけるMITFによるDICERの系統特異的転写調節
Carmit Levy1, Mehdi Khaled, Kathleen C Robinson
1Department of Dermatology, Cutaneous Biology Research Center, Mass. General Hospital, Harvard Medical School, MA 02115, USA.
Cell
|June 17, 2010
まとめ
マイクロRNA (miRNA) 処理は,DICERによって規制されています. MITF転写因子はDICERを直接標的にし,メラノサイトの分化と生存の間にmiRNAの成熟を制御する.
科学分野:
- 分子生物学は分子生物学である.
- 発達生物学 発達生物学について
- 遺伝学 遺伝学とは
背景:
- DICERは,マイクロRNA (miRNA) の成熟に不可欠である.
- 発達と疾患におけるDICER発現を制御するメカニズムは,依然としてほとんど不明である.
研究 の 目的:
- メラノサイト分化中のDICER発現の調節を調査する.
- ミRNA処理とメラノサイト生存におけるDICERの役割を明らかにする.
主な方法:
- メラノサイトの微分化におけるmiRNA発現のプロファイリング.
- MITFによるDICERの転写制御を分析する.
- メラノサイトにおけるDICERノックアウト (KO) の影響を調査する.
主要な成果:
- メラノサイト分化中に2つの異なるmiRNA発現パターンが観察されました.
- MITFは,保存された規制要素を介して,DICERの転写を直接ターゲットにして活性化します.
- DICER欠乏症はメラノサイトにとって致命的であり,部分的には,BIMレベルに影響する,pre-miRNA-17~92クラスタの処理障害によるものです.
結論:
- MITF媒介のDICER調節は,系統特異のmiRNA成熟の重要なメカニズムである.
- この経路は,メラノ細胞の発達と生存に不可欠です.
- 類似の調節メカニズムは,他の細胞タイプにも存在する可能性があります.
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