非高リスクと診断された神経芽腫における高リスク臨床経過に関連する分子学的特徴
Rixt S Bruinsma1, Wendy W J de Leng2, Marta F Fiocco1,3,4
1Princess Máxima Center for Pediatric Oncology, 3584 CS Utrecht, The Netherlands.
Cancers
|January 28, 2026
まとめ
分節的染色体異常(SCA)および1p欠失は、高リスク臨床経過を有する神経芽腫患者を特定します。これらの分子マーカーは、ALT活性化および特定の遺伝子増幅とともに、非高リスク神経芽腫における不良転帰を予測します。
科学分野:
- 小児腫瘍学
- がんゲノミクス
- 分子病理学
背景:
- 初期に非高リスクと分類された一部の神経芽腫患者は、攻撃的な疾患と予後不良を示す。
- この不一致を理解するには、分子ドライバーの特定が重要である。
研究 の 目的:
- 非高リスク神経芽腫患者において、診断時の分子異常が臨床的に高リスクな経過を予測する要因を特定すること。
- 分節的染色体異常(SCA)およびテロメア維持機構(TMM)の役割を調査すること。
主な方法:
- 2014年から2021年の間に診断された89人の非高リスク神経芽腫患者におけるSCA、遺伝子増幅、変異、およびTMMの分析。
- 一塩基多型アレイ、次世代シーケンシング、FISH、WGS、RNAシーケンシングを利用。
- SCA数の多重代入。
主要な成果:
- 分節的染色体異常(SCA)プロファイル(SCAが1つ以上)は、高リスク経過の患者で有意に頻度が高かった(76% vs 15%、p=0.004)。
- 1p欠失(p=0.034)、1q、2p、17qの増加、4p、11qの欠失、およびSCA数の増加は、高リスク転帰と関連していた。
- テロメアの代替的伸長(ALT)は高リスク患者の57%で活性化され、2例でMDM2/CDK4増幅が観察された。
結論:
- SCAプロファイルおよび1p欠失は、神経芽腫における高リスク臨床経過の有意な予測因子である。
- ALT活性化、MDM2/CDK4共増幅、および特定のSCAは、リスク層別化の潜在的なバイオマーカーとしてさらなる調査に値する。
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