ラテン系人口の2型糖尿病とHNF1Aの低頻度変異の関連性

, Karol Estrada¹, Ingvild Aukrust²

¹Program in Medical and Population Genetics, Broad Institute of Harvard and MIT, Cambridge, Massachusetts2Analytic and Translational Genetics Unit, Massachusetts General Hospital, Boston3Department of Medicine, Harvard Medical School, Boston, Massachusetts.

JAMA

|June 11, 2014

まとめ

HNF1A遺伝子の珍しい遺伝的変異は,ラテン系人口の2型糖尿病リスクの増加と関連しています. この発見は,この人口集団の将来のスクリーニングと治療戦略を参考にすることができます.

科学分野:

遺伝学遺伝学とは
エンドクリノロジーエンドクリノロジー
人口の健康人口の健康

背景:

ラテン系の人口は,世界的に2型糖尿病の高い罹患率を示しています.
遺伝的貢献を理解することは,標的を絞った介入に不可欠です.

研究の目的:

大規模なラテン系コホートにおける2型糖尿病に関連した珍しい遺伝子変異を調査する.
これらの関連を支える分子メカニズムを探求する.

主な方法:

3756人のラテン系アメリカ人 (1794人が2型糖尿病患者) の全エクソームシーケンシング.
多民族のデータセットでの変異関連テスト (14,276人の参加者).
タンパク質機能の実験的特徴付け.

主要な成果:

希少なHNF1Aミセンス変種 (p.E508K) は,2型糖尿病の罹患率 (OR=5.48) と強く関連している.
この変種は,複製データセットにおけるラテン系個人に特異的であった.
実験的測定では,HNF-1Aタンパク質のトランザクティベーション活性が低下していることが示されました.

結論:

単一の低頻度のHNF1A変種は,ラテン系アメリカ人の2型糖尿病と関連しています.
この変種はタンパク質の機能に影響を与え,病気のリスクに寄与する可能性があります.
発見は,この集団における標的型スクリーニングと治療の可能性を示唆しています.

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