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mTORC1依存型AMD1調節は,前立腺がんにおけるポリアミン代謝を維持する

Amaia Zabala-Letona^1,2, Amaia Arruabarrena-Aristorena¹, Natalia Martín-Martín^1,2

¹CIC bioGUNE, Bizkaia Technology Park, 801 building, 48160, Derio, Spain.

|June 29, 2017

まとめ

ラパミシン複合体1 (mTORC1) 経路のメカニズム的標的は,がんの成長に不可欠なポリアミン代謝を調節する. この研究は,mTORC1がS- アデノシルメチオニンデカルボキシラーゼ1 (AMD1) の安定性を制御し,がんの進行に影響を及ぼすことを明らかにしています.

科学分野:

腫瘍学
分子生物学
代謝経路

背景:

PTEN-PI3K-mTORC1経路は,がん細胞の成長と増殖に不可欠です.
ポリアミンは腫瘍発生性を支持する必須代謝物です.

研究の目的:

前立腺がんにおけるポリアミン代謝の調節におけるmTORC1の役割を調査する.
mTORC1とポリアミン合成の変化を結びつける特定の分子メカニズムを特定する.

主な方法:

前立腺がんのマウスモデルにおける統合的代謝分析
人間の前立腺がんのバイオプシの分析
S- アデノシルメチオニンデカルボキラーゼ1 (AMD1) の安定性と免疫反応性の評価
mTORC1阻害剤の臨床試験からのサンプル評価

主要な成果:

mTORC1は,S-アデノシルメチオニンデカルボキシラーゼ1 (AMD1) の安定性を制御することによってポリアミンダイナミクスを調節する.
腫瘍はデカルボキシル化S-アデノシルメチオニン (dcSAM) とポリアミン合成の変化を示しています.
mTORC1が活性化すると,ヒト前立腺がんではAMD1が上位調節される.
mTORC1阻害剤 (エヴェロリムス) による治療はAMD1濃度と増殖を低下させた.

結論:

mTORC1は成長信号を統合し,ポリアミン調節を通じて腫瘍性代謝プログラムを促進します.
AMD1の安定性は,mTORC1によって制御される新しい調節点であり,dcSAMの生成と癌細胞の成長に不可欠である.

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