がん症例と関連した生殖線ゲノム同胞性の頻度は,がん症例と関連している
Guillaume Assié1, Thomas LaFramboise, Petra Platzer
1Genomic Medicine Institute, Cleveland Clinic Foundation, Cleveland, Ohio 44195, USA.
JAMA
|March 28, 2008
まとめ
特定の場所での生殖線同胞性の増加は,固体腫瘍における異胞性の喪失 (LOH) の高頻度に関連しています. この発見は,がんの予備性および進行における生殖線ホモジゴシティの役割を示唆しています.
科学分野:
- 遺伝学 遺伝学とは
- 腫瘍学 腫瘍学
- がん研究 がん研究
背景:
- 癌は,遺伝的要因の影響を受ける複雑な病気であり,遺伝的傾向や既得変異を含む.
- ヘテロジゴシティの喪失 (LOH) は癌における一般的な出来事ですが,逸話的な観察は,がんの予備性における生殖線ホモジゴシティの潜在的な役割を示唆しました.
研究 の 目的:
- 健康な対照群と比較して,固体腫瘍を有する患者における生殖線ホモジゴシティの頻度を調査する.
- ゲルムラインの同胞性の増加が,がん組織におけるLOHと関連しているかどうかを判断する.
主な方法:
- 乳がん,前立腺がん,頭頸部がんを患った385人の患者からの生殖系統と腫瘍DNAは,全ゲノムマイクロサテライト分析を使用してLOHのために分析されました.
- がん患者と対照群の間で特定の場所での生殖線ホモジゴシティの頻度が比較されました.
- ソマティックLOHの頻度は,高生殖線ホモジゴシティを持つロシで評価されました.
主要な成果:
- 16の共通の位置 (P < .001) に関するコントロールと比較して,がん患者で生殖線同位体の頻度が著しく高いことが観察されました.
- これらの位置で生殖系ヘテロジゴスであったがん患者では,LOHの頻度は他のマーカー (50%) (P < .001) に比べて高かった (58%).
- これらの関連性は,肺がんの独立したデータセットとゲノム全体で検証されました.
結論:
- 特定の場所での生殖線同胞性の増加は,複数の固体腫瘍のタイプで繰り返される発見です.
- これらの高ホモジゴシティーロシオにおける生殖線ヘテロジゴシティは,対応するがんではLOHの増加と関連しています.
- これらの発見は,がんの予備性および発症における生殖線ホモジゴシティの潜在的な役割を強調しています.
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