メラノサイト系統プログラムにより,MAPキナーゼ経路の阻害に対する抵抗性が得られます
Cory M Johannessen1, Laura A Johnson, Federica Piccioni
11] The Broad Institute of Harvard University and Massachusetts Institute of Technology, 7 Cambridge Center, Cambridge, Massachusetts 02142, USA [2] Department of Medical Oncology, Dana-Farber Cancer Institute, 44 Binney Street, Boston, Massachusetts 02115, USA [3] Harvard Medical School, 25 Shattuck Street, Boston, Massachusetts 02115, USA.
Nature
|November 5, 2013
まとめ
BRAF (V600E) メラノーマはRAF-MEK-ERK信号に依存しています. 研究者は,標的治療に対する耐性を誘発するCREBを含むcAMP依存経路を特定し,効果を向上させるための組み合わせ治療を提案しました.
科学分野:
- 腫瘍学 腫瘍学
- 分子生物学は分子生物学である.
- 薬理学 薬理学とは
背景:
- BRAF (V600E) 変異を有する悪性メラノマは,RAF-MEK-ERKシグナル伝達に依存しています.
- RAFおよびMEK阻害剤は有効ですが,耐性課題に直面しています.
研究 の 目的:
- BRAF (V600E) メラノーマにおける耐性メカニズムを全体的に特徴付ける.
- 薬剤耐性を克服するための新しい治療目標と組み合わせを特定する.
主な方法:
- 15,500以上の遺伝子の発現を含む,機能増強に対する体系的な耐性研究.
- BRAF (V600E) メラノーマ細胞系をRAF,MEK,ERK,またはRAF-MEK阻害剤の組み合わせで治療する.
- 再発性腫瘍におけるCREBの活性性を評価するために,患者の生検の分析.
主要な成果:
- CREBを含むサイクルAMPに依存するメラノサイトシグナル伝達ネットワークは,抵抗の原動力として特定されました.
- リン酸化CREBはRAF-MEK阻害によって抑制されたが,再発性腫瘍では回復した.
- c-FOS,NR4A1,NR4A2,MITFなどの転写因子も耐性を引き出している.
結論:
- メラノサイト系統による依存性の腫瘍性失調は,RAF-MEK-ERK阻害剤に対する耐性を引き起こす可能性があります.
- MAPK経路阻害剤とヒストンデアセチラーゼ阻害剤を併用すると,MITFおよびcAMP媒介の抵抗を克服することができます.
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