伝染性がんのクローン起源と進化
Claudio Murgia1, Jonathan K Pritchard, Su Yeon Kim
1MRC/UCL Centre for Medical Molecular Virology, Division of Infection and Immunity, University College London, 46 Cleveland Street, London W1T 4JF, UK.
Cell
|August 12, 2006
まとめ
犬の伝染性性性交性腫瘍 (CTVT) は,ウイルスではなく,腫瘍細胞自身によって引き起こされます. 遺伝子分析によると,CTVTは2000年以上前に単一のクローンから生まれた.
科学分野:
- 腫瘍学 腫瘍学
- 遺伝学 遺伝学とは
- 獣医医学 獣医医学は,獣医医学というものです.
背景:
- 犬の伝染性性性腫瘍 (CTVT) は,犬の自然発生の伝染性がんである.
- CTVTの伝染剤の正確な性質は,がん研究における長年の疑問である.
研究 の 目的:
- CTVTが腫瘍細胞によって伝播されるかどうかを判断する.
- CTVT.の遺伝的起源と進化を調査する.
主な方法:
- メジャーヒストコンパティビリティ (MHC) 遺伝子,マイクロサテライト,ミトコンドリアDNA (mtDNA) を含む遺伝子マーカーの分析.
- 自然に発生するCTVTサンプルとマッチした宿主の血液サンプル間の遺伝的プロファイルの比較.
- 複数の大陸から採取した腫瘍サンプルを系統遺伝学的に分析した.
主要な成果:
- CTVT腫瘍は,宿主犬と遺伝的に異なっていた.
- 分析されたCTVTのサンプルはすべて,1つの腫瘍クローンから発生し,2つのサブクラードに分裂した.
- 系統遺伝学的分析によると,CTVTは200〜2500年前にオオカミや東アジアの犬種から生まれたことを示唆しています.
- CTVTは高いアヌプロイド性ですが,安定したゲノタイプであり,腫瘍の成長中にMHC発現のダウンモジュール化があります.
結論:
- CTVTは,生きた腫瘍細胞によって伝達されるクローン癌です.
- この研究は,がんのゲノム不安定性,アロ移植移植,および伝染性がんの進化に関する洞察を提供します.
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