ミトコンドリア複合体I が腎臓がんの転移を促進する
Divya Bezwada1, Luigi Perelli2, Nicholas P Lesner1
1Children's Medical Center Research Institute, University of Texas Southwestern Medical Center, Dallas, TX, USA.
Nature
|August 14, 2024
まとめ
腎臓がん細胞の代謝は変化し,クリア細胞腎臓細胞癌 (ccRCC) はミトコンドリア活性が抑制されている. しかし,ccRCCの転移は代謝の増加を示し,癌の進行中に進化する代謝プログラムを示唆する.
科学分野:
- 癌における代謝再プログラム
- 腎臓細胞がんにおけるミトコンドリア機能
背景:
- ほとんどの腎臓がんは 代謝機能障害を示します
- この機能障害がヒトのがん進行に及ぼす影響は不明である.
研究 の 目的:
- 腎臓がんの代謝再プログラムについて 研究する
- 代謝機能障害がクリアセル腎臓細胞癌 (ccRCC) の進行と転移にどのように影響するかを理解する.
主な方法:
- 腫瘍切除時に80人以上の腎臓がん患者に13Cラベル付栄養素を注入する.
- 孤立したヒト腎臓と腫瘍ミトコンドリアにおける呼吸の測定.
- 代謝の標識を評価するために,in vivoおよびex vivoの器官型培養.
- ミトコンドリア機能の転移における役割を研究するマウスでの実験.
主要な成果:
- 清い細胞腎臓細胞癌 (ccRCC) は,組織内部の代謝再プログラムを示す抑制されたトリカルボキシル酸 (TCA) サイクルラベルを示しています.
- ccRCCにおける低電子輸送連鎖活動は,変化したTCAサイクルラベルに寄与する.
- 転移したccRCCは,原発性腫瘍と比較してTCAサイクルラベリングが強化されています.
- マウスでは,ミトコンドリアの呼吸を刺激することで転移が促進され,電子輸送鎖複合体Iを抑制すると転移が減少する.
結論:
- 代謝特性と負債は腎臓がんの進行中に進化する.
- ミトコンドリア機能はccRCCの転移を制限する要因であるが,原発部位での腫瘍の成長は制限しない.
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