GATA2トランスクリプションネットワークは,RAS腫瘍遺伝子駆動型非小細胞肺がんに必須です
Madhu S Kumar1, David C Hancock, Miriam Molina-Arcas
1Signal Transduction Laboratory, Cancer Research UK London Research Institute, 44 Lincoln's Inn Fields, London WC2A 3LY, UK.
Cell
|May 1, 2012
まとめ
RAS経路の変異は,非小細胞肺がん (NSCLC) が GATA2.2 に依存することを誘発する. GATA2調節経路をターゲットにすることで,KRAS変異性肺がんに対する新たな治療戦略が提供されます.
科学分野:
- 腫瘍学 腫瘍学
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
背景:
- 非小細胞肺がん (NSCLC) は,世界中でがんによる死亡率の主な原因です.
- NSCLC症例の約50%は,受容体チロシンキナーゼ/RAS経路に変異がある.
研究 の 目的:
- RAS経路変異性NSCLCにおける転写因子GATA2の役割を調査する.
- GATA2 調節経路内の潜在的な治療標的を特定する.
主な方法:
- 遺伝子発現とゲノム占有率の分析を行いました.
- GATA2 調節経路の機能的重要性を評価した.
- カラス駆動型NSCLCマウスモデルを使用して,腫瘍の発達と回帰におけるGata2の役割を評価しました.
主要な成果:
- GATA2の喪失は,RAS経路変異性NSCLC細胞の生存能力を選択的に低下させた.
- GATA2は,プロテアソーム,IL-1シグナル伝達,およびRhoシグナル伝達経路を調節することが判明しました.
- Gata2の喪失は,マウスの確立されたクラス変異性NSCLC腫瘍において,腫瘍の発達を著しく抑制し,再帰を誘導した.
結論:
- RAS経路変異性NSCLCは,GATA2.2へのノンコゲン依存性を示しています.
- GATA2 調節経路をターゲットにすることで,GATA2 自身が薬剤耐性でない場合でも,有望な治療法を提供することができます.
- 既存の阻害剤とGATA2依存経路の結合抑制は,前臨床モデルにおいて,有意な腫瘍クリアランスをもたらした.
関連する概念動画
The Ras Gene
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Ras and Rho are small monomeric GTPases that act downstream of receptor tyrosine kinase (RTK) and regulate various cellular processes. These GTPases switch between active and inactive states by binding to guanine nucleotides.
Three regulatory proteins control their activity:
Three regulatory proteins control their activity:
The Ras Gene
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 superfamily...
Ras is a superfamily...
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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...
Cancer-Critical Genes I: Proto-oncogenes
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...
The Retinoblastoma Gene
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The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...

