複数の遺伝子の突然変異は,拡散型大B細胞リンパ腫におけるNF-kappaBの放緩を引き起こします
Mara Compagno1, Wei Keat Lim, Adina Grunn
1Institute for Cancer Genetics and the Herbert Irving Comprehensive Cancer Center, Columbia University, New York, New York 10032, USA.
Nature
|May 5, 2009
まとめ
NF-kappaB経路のレギュレータ,特にA20遺伝子の遺伝子変異は,拡散型大B細胞リンパ腫 (DLBCL) で一般的です. これらの遺伝的病変は,NF-kappaBの活性化を長引かせ,リンパマゲネシスを促進します.
科学分野:
- 腫瘍学 腫瘍学
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
背景:
- 拡散型大B細胞リンパ腫 (DLBCL) は,ABC-DLBCLのような亜型が攻撃的であり,最も一般的な成人リンパ腫です.
- 活性化されたB細胞型DLBCL (ABC-DLBCL) は,NF-kappaB転写複合体の構成的活性化によって特徴付けられます.
- DLBCLにおけるNF-kappaB活性化の起源 (内在腫瘍プログラム対病原遺伝事象) は不明である.
研究 の 目的:
- DLBCLサブタイプにおけるNF-kappaB活性化の遺伝的基礎を調査する.
- リンパマゲネシスにおける異常なNF-kappaBシグナル伝達に関与する特定の遺伝子や変異を特定する.
主な方法:
- DLBCL患者のサンプルでNF-kappaBを調節する遺伝子の体内の変異分析.
- 変異した遺伝子の役割を評価するために,細胞系に遺伝子を再導入する機能的研究.
主要な成果:
- ABC-DLBCLの50%以上と,GCB-DLBCLのわずかな部分では,NF-kappaBのレギュレータに変異がある.
- TNFAIP3 (A20) 遺伝子は頻繁に不活性化されています (約. 30%の患者) で,腫瘍抑制剤として作用する.
- CARD11とTRAF2の変異により,NF-kappaBの活性化が強化され,リンパ細胞形成に寄与する.
結論:
- 複数のNF-kappaB調節体の遺伝的病変は,DLBCLの主要な要因である.
- これらの遺伝的変異による異常で長期にわたるNF-kappaB反応はリンパマゲネシスを促進する.
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