非ホジキンリンパ腫におけるヒストン修飾遺伝子の頻繁な変異
Ryan D Morin1, Maria Mendez-Lago, Andrew J Mungall
1Canada's Michael Smith Genome Sciences Centre, BC Cancer Agency, Vancouver, British Columbia V5Z 1L3, Canada.
Nature
|July 29, 2011
まとめ
この研究では,非ホジキンリンパ腫 (NHL) の変異遺伝子を109個特定し,MLL2およびMEF2Bなどのヒストンの改変に関与する遺伝子の頻繁に発生する変異を明らかにし,小胞性リンパ腫 (FL) および拡散性大B細胞リンパ腫 (DLBCL) に関する変異を明らかにしました. これらの発見は,リンパマゲネシスにおけるクロマチンの生物学的破壊を強調しています.
科学分野:
- 血液学 ヘマトロジ
- 腫瘍学 腫瘍学
- 遺伝学 遺伝学とは
背景:
- 葉っぱ性リンパ腫 (FL) と拡散性大B細胞リンパ腫 (DLBCL) は,最も一般的な非ホジキン型リンパ腫 (NHL) である.
- NHLの病原性の遺伝的基盤を理解することは,標的治療の開発に不可欠です.
研究 の 目的:
- 腫瘍と正常DNAの配列を解析することによって,B細胞NHLの変異を有する遺伝子を識別する.
- RNA-seqデータを分析し,NHLsのより大きなコホートにおける候補変異遺伝子を特定します.
- NHLにおける複数の体性突然変異を持つ遺伝子を確認するために.
主な方法:
- 腫瘍の全エクソームシーケンシングと,13人のDLBCLと1人のFL症例の正常DNAと一致した.
- 113人のNHL症例のRNA配列分析.
- 109の遺伝子の体変異を検証するために再配列化を行います.
主要な成果:
- NHL症例全体で複数の体内変異を持つ109の遺伝子を特定しました.
- ヒストンの改変に関連する遺伝子の頻繁に発生する体内変異が見つかりました.
- MLL2 (ヒストンメチルトランスフェラーゼ) の変異は,DLBCLの32%,FLの89%で観察されました.
- DLBCLの11.4%とFLの13.4%でMEF2B (カルシウム調節遺伝子) の変異が検出されました.
結論:
- ヒストンの改変遺伝子の体内変異は,FLおよびDLBCLにおいて一般的です.
- クロマチンの生物学的障害はリンパマゲネシスにおいて重要な役割を果たします.
- MLL2とMEF2Bの変異は,これらのNHLサブタイプで一般的です.
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