関連する実験動画
Updated: Apr 26, 2026

08:47
Monitoring eIF4F Assembly by Measuring eIF4E-eIF4G Interaction in Live Cells
Published on: May 1, 2020
2.5K
RNA G四重複体は,がんにおけるeIF4Aに依存した腫瘍遺伝子の翻訳を引き起こします
Andrew L Wolfe1, Kamini Singh2, Yi Zhong3
11] Cancer Biology and Genetics, Memorial Sloan-Kettering Cancer Center, New York, New York 10065, USA [2] Weill Cornell Graduate School of Medical Sciences, New York, New York 10065, USA [3].
Nature
|August 1, 2014
まとめ
ユカリオット発現因子4A (eIF4A) のRNAヘリカーゼは,がんにおける腫瘍遺伝子の発現を誘導する. 抗癌化合物であるシルベストロールは,このメカニズムを標的とし,白血病やその他の癌の治療の可能性を提供します.
科学分野:
- 分子生物学は分子生物学である.
- 腫瘍学 腫瘍学
- RNA 生物学 RNA 生物学
背景:
- オンコタンパク質発現の翻訳制御は,がんの発症の重要な要因である.
- ユカリオット初期化因子4A (eIF4A) のRNAヘリケーゼは,腫瘍生成に作用する.
- シルヴェストロールおよび関連化合物は,特定の細胞機構を標的として,抗がん性を持っています.
研究 の 目的:
- 癌におけるeIF4ARNAヘリケーズに依存する翻訳制御のメカニズムを解明する.
- eIF4Aが腫瘍形成とシルヴェストロールの抗がん効果にどのように貢献するのかを理解する.
- eIF4A.によって規制される特定のRNA特性とトランスクリプトを識別する.
主な方法:
- トランスクリプトームスケールリボソーム足跡 (TSRF) は,eIF4A依存トランスクリプトを識別するために使用されました.
- 実験室内および実験室内での研究は,ネズミおよびヒトの白血病細胞を用いて行われました.
- 解析は,RNA G-四重複構造を含む5'未翻訳領域 (UTR) 配列に焦点を当てました.
主要な成果:
- eIF4AはT細胞急性リンパ性白血病の発症を促進し,その維持に不可欠です.
- シルベストロールによるeIF4Aの抑制は,白血病細胞に対する強力な治療効果を示した.
- 主要なeIF4A依存トランスクリプトには,腫瘍遺伝子,スーパーエンハンサー関連トランスクリプション因子,および表遺伝的レギュレータが含まれており,しばしば5' UTR G-quadruplexモチーフが特徴です.
結論:
- eIF4ARNAヘリカーゼは,がんにおける腫瘍遺伝子の翻訳の重要な調節体である.
- シルベストロールのような化合物でeIF4Aをターゲットにすることは,がんに対する有望な治療戦略を提供します.
- 特定のがん関連遺伝子の5' UTR は,eIF4A. に依存する標的の脆弱性を提示する.
関連する概念動画
Leaky Scanning
4.5K
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA. Marilyn Kozak discovered that the sequence RCCAUGG (where R...
4.5K
The Ras Gene
5.7K
The Ras-gene-encoded proteins are regulators of signaling pathways controlling cell proliferation, differentiation, or cell survival. The Ras-gene family in humans constitutes three primary members—the HRas, NRas, and KRas. These genes code for four functionally distinct yet closely related proteins—the HRas, NRas, KRas4A, and KRas4B. The involvement of mutant Ras genes in human cancer was first discovered in 1982 and is among the most common causes of human tumorigenesis.
Ras is a...
Ras is a...
5.7K
Initiation of Translation
24.6K
Initiating translation is complex because it involves multiple molecules. Initiator tRNA, ribosomal subunits, and eukaryotic initiation factors (eIFs) are all required to assemble on the initiation codon of mRNA. This process consists of several steps that are mediated by different eIFs.
First, the initiator tRNA must be selected from the pool of elongator tRNAs by eukaryotic initiation factor 2 (eIF2). The initiator tRNA (Met-tRNAi) has conserved sequence elements including modified bases at...
First, the initiator tRNA must be selected from the pool of elongator tRNAs by eukaryotic initiation factor 2 (eIF2). The initiator tRNA (Met-tRNAi) has conserved sequence elements including modified bases at...
24.6K
Cancer-Critical Genes I: Proto-oncogenes
8.9K
Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
8.9K
Cancer-Critical Genes I: Proto-oncogenes
5.8K
5.8K
Translation
16.8K
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
Proteins are...
Translation Produces the Building Blocks of Life
Proteins are...
16.8K

