関連する実験動画
Updated: Jul 11, 2026
08:40
Genome-wide Screen for miRNA Targets Using the MISSION Target ID Library
Published on: April 6, 2012
マイクロRNA-223発現の進化的に保存されたメカニズムが,マイクロRNA遺伝子プロファイリングによって明らかになった
Taro Fukao1, Yoko Fukuda, Kotaro Kiga
1Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan. tarofukao@2002.jukuin.keio.ac.jp <tarofukao@2002.jukuin.keio.ac.jp>
Cell
|May 8, 2007
まとめ
この研究は,ミエロイド細胞におけるマイクロRNA-223 (miR-223) の新しい調節機構を明らかにしています. miR-223遺伝子は,以前から知られている経路とは異なる骨髄性転写因子によって制御されます.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
- バイオインフォマティックス
背景:
- マイクロRNA (miRNA) は,保存された配列と特定の発現パターンを表しています.
- 組織特異的なmiRNA発現は,miRNA遺伝子の近くのcis作用要素によってしばしば調節されます.
研究 の 目的:
- miRNA発現を制御する規制要素を特定する.
- 粒子の形成過程におけるマイクロRNA-223 (miR-223) の独特の調節メカニズムを解明する.
主な方法:
- miRNA転写開始部位の近くの保存されたゲノム要素を特定するためのバイオ情報分析.
- ミエロイド転写因子 (PU.1およびC/EBP) がmiR-223.3を調節する役割を調査した.
主要な成果:
- miR-223に近接する保存されたシス調節要素を特定した.
- miR-223の発現は,骨髄性転写因子PU.1とC/EBPによって潜在的に駆動されていることが判明しました.
- 前述の経路とは異なるmiR-223の新たな規制メカニズムを提案した.
結論:
- miR-223遺伝子は"ミエロイド遺伝子"として機能し,特定の転写因子によって調節されます.
- 保存されたシス調節要素が,このミエロイド特異的調節を種を超えて支配している可能性が高い.
- 2つの異なるメカニズムは,おそらくmiR-223を制御し,ミエロイド機能と分化において重要な役割を果たしている.
関連する概念動画
01:22MicroRNAs
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...
02:51mRNA Stability and Gene Expression
The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
Cis-acting Elements involved in mRNA stability
Cis-acting Elements involved in mRNA stability
01:22MicroRNAs
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...
02:51mRNA Stability and Gene Expression
The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
Cis-acting Elements involved in mRNA stability
Cis-acting Elements involved in mRNA stability
01:22MicroRNAs
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...