病原性BRCA1変異媒体の有病率は,米国の5つの人種/民族グループで確認された
Esther M John1, Alexander Miron, Gail Gong
1Northern California Cancer Center, Fremont, CA 94538-2334, USA. ejohn@nccc.org
JAMA
|December 27, 2007
まとめ
BRCA1変異のキャリアの罹患率はヒスパニック系で最も高く,アジア系アメリカ人の乳がん患者で最も低い. この研究は,多様な集団におけるより広範な遺伝子スクリーニングの必要性を強調しています.
科学分野:
- 遺伝学 遺伝学とは
- 腫瘍学 腫瘍学
- エピデミオロジー エピデミオロジー
背景:
- 人種/少数民族の集団における病原性BRCA1変異のキャリアの流行に関するデータは限られている.
- 遺伝的傾向を理解することは,標的を絞ったがん予防と治療戦略にとって極めて重要です.
研究 の 目的:
- ヒスパニック系,アフリカ系アメリカ人,アジア系アメリカ人の女性乳がん患者におけるBRCA1キャリアの罹患率を決定し,比較する.
- アシュケナジ・ユダヤ人の祖先を持つ,または持たないを含む非ヒスパニック系白人患者との流行を比較する.
主な方法:
- 65歳未満の女性乳がん患者の集団ベースの多民族シリーズを分析した.
- 人種・民族・祖先のデータは自己報告でした.
- ホービッツ=トンプソン推定方程式を用いて,加重された罹患率の推定値と信頼区間を計算した.
主要な成果:
- BRCA1の罹患率はヒスパニック系では3.5%,アフリカ系アメリカ人では1.3%,アジア系アメリカ人の患者では0.5%でした.
- アシュケナジ・ユダヤ人では8.3%,その他の非ヒスパニック系白人患者では2.2%であった.
- 特に,若いアフリカ系アメリカ人患者 (<35歳) の流行率は16.7%で高かった.
結論:
- BRCA1変異のキャリアの罹患率は,人種/民族グループによって著しく変化した.
- ヒスパニック系患者はマイノリティグループの中で最も高い罹患率を示したが,アジア系アメリカ人は最も低い罹患率を示した.
- ヒスパニック系の人々の高い罹患率は,認められていないユダヤ人の祖先からの貢献を示唆する可能性がある.
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