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非 喫煙 者 の 肺 がん: レビュー
Cian Murphy1,2, Tej Pandya1,3, Charles Swanton1,4,5
1Cancer Evolution and Genome Instability Laboratory, The Francis Crick Institute, London, United Kingdom.
JAMA
|October 20, 2025
まとめ
喫煙しない人の肺がんは 全世界の症例の15~20%を占めています EGFR変異のような標的型遺伝子の変異を特定することで,標的型治療で生存率が向上します.
科学分野:
- 腫瘍学
- ゲノミクス
背景:
- 肺がんは一生で100本未満のタバコを吸った人の 15%から20%を占めています
- アメリカでは 女性の罹患率が男性より高い.
- アデノカルシノーマは最も一般的な組織疾患で,受動喫煙,ラドン,家族歴などの危険因子があります.
研究 の 目的:
- 喫煙しない人の肺がんの 独特のゲノムを強調するためです
- 特定のゲノム変異に対する標的治療による生存率の改善を強調する.
主な方法:
- 肺がん患者の組織学およびゲノム学的データの分析
- 喫煙者と非喫煙者の間の変異プロフィールの比較
- 分子特性と治療の種類に基づく治療結果のレビュー
主要な成果:
- タバコを吸ったことのない人からの腫瘍は,喫煙者と比較して標的となるゲノム変異 (EGFR変異,ALK再編) の有病率が高い (43%対11% EGFR,12%対2%ALK).
- タバコを吸ったことのない人は 腫瘍の変異が少ないのです
- 標的治療では進行した非小細胞肺癌の生存期間の中央値は3~5年を超え,それ以外の治療では1~2年を超えています.
結論:
- たばこを吸わない人の肺がんは 行動可能なゲノム変異の頻度が高いことが特徴です
- タイロシンキナーゼ阻害剤などの標的治療は,この集団における生存率を大幅に改善します.
- 完全なゲノム解析は 肺がんの非喫煙者の治療決定に 極めて重要です
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