XBP1は,HIF1α経路を制御することによって,トリプルネガティブ乳がんを促進します
Xi Chen1, Dimitrios Iliopoulos2,3, Qing Zhang4
1Weill Cornell Medical College, 1300 York Avenue, New York, NY 10065.
Nature
|March 28, 2014
まとめ
展開タンパク質応答 (UPR) センサーXBP1は,トリプルネガティブ乳がん (TNBC) で活性化されます. XBP1をターゲットにすることで,腫瘍の成長と進行を抑制することで,この攻撃的な癌に対する新しい治療法を提供することができます.
科学分野:
- 分子生物学は分子生物学である.
- 腫瘍学 腫瘍学
- 細胞のストレス反応は,
背景:
- 癌細胞は,展開されたタンパク質応答 (UPR) を含む適応経路を活性化して,不十分な血管化のストレスから生き残る.
- IRE1とXBP1によって媒介されるUPRは,様々な腫瘍で発見されていますが,乳腺上皮細胞におけるXBP1の役割は不明です.
- トリプルネガティブ乳がん (TNBC) は,限られた治療選択肢で攻撃的です.
研究 の 目的:
- トリプルネガティブ乳がん (TNBC) の腫瘍発生性および進行におけるXBP1の役割を調査する.
- XBP1がTNBCに寄与する分子メカニズムを解明する.
- TNBCの潜在的な治療標的を特定する.
主な方法:
- 乳がん細胞系モデルを用いて,XBP1減少の影響を研究した.
- XBP1転写制御ネットワークの全ゲノムマッピングを行いました.
- XBP1遺伝子発現シグネチャーと予後との相関性について,独立した患者コホートを分析した.
主要な成果:
- XBP1の減少は,腫瘍の成長,再発を抑制し,TNBCモデルにおけるCD44 (高い) CD24 (低い) 集団を減少させた.
- XBP1はHIF1αと複合体を形成し,低酸素誘導因子1αの標的を調節し,TNBCの腫瘍発生性を促進します.
- TNBC患者における特定のXBP1遺伝子発現シグネチャーは,HIF1α/低酸素シグネチャと相関し,予後が悪い.
結論:
- XBP1は,TNBCの腫瘍発生性と進行において重要な役割を果たします.
- XBP1-HIF1α転写複合体は,TNBCの発達に不可欠である.
- XBP1経路を標的にすることは,TNBCの潜在的な治療戦略です.
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