インタールイキン-1ポリモルフィズムは,胃がんのリスクの増加と関連しています
E M El-Omar1, M Carrington, W H Chow
1Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, Maryland, USA. elomare@mail.nih.gov
Nature
|April 4, 2000
まとめ
インタールイキン-1遺伝子変異は,ヘリコバクター・パイロリ感染症で低塩素水分症と胃がんのリスクを高めます. これらの遺伝的要因は,インタールイキン-1-βの産生に影響を与え,胃酸の分泌と疾患の発症に影響を与えます.
科学分野:
- 胃腸内科 胃腸内科
- 免疫遺伝学 免疫遺伝学とは
- 腫瘍学 腫瘍学
背景:
- ヘリコバクター・パイロリ菌の感染は,胃がんや十二指腸潰瘍を含む多様な臨床結果をもたらす.
- 胃酸の分泌や胃炎の重症度などの胃の生理学的反応は,感染した個人によって大きく異なります.
- 胃炎の分布 (胃腸と体) は,酸分泌に影響し,体胃炎は,がんの前駆体である低塩素水分と胃縮と関連しています.
研究 の 目的:
- インターレウキン-1遺伝子クラスターポリモルフィズムと,H. pyloriに感染した個体におけるヒポクロヒドリアと胃がんのリスクとの関連を調査する.
- ホストの遺伝子とH. pyloriに関連した疾患との関連を媒介するインタールイキン-1-βの役割を調査する.
主な方法:
- インタレウキン-1遺伝子クラスタポリモルフィズム,特にインタレウキン-1-βの産生を促進すると疑われるものの分析.
- DNA-タンパク質の相互作用に影響を与えるTATA-boxポリモルフィズムを含む特定のポリモルフィズム間の結合不均衡の評価.
- 特定されたポリモルフィズムと,H. pyloriに感染した集団におけるヒポクロヒドリアや胃がんなどの臨床結果の相関.
主要な成果:
- インタールイキン-1遺伝子群の特定のポリモルフィズムは,H. pylori誘発の低塩素水症のリスクの増加と関連しています.
- これらのポリモルフィズムはまた,胃がんを発症するより高いリスクと関連しています.
- 1つのTATA-boxポリモルフィズムがDNAとタンパク質の相互作用にインビトロで有意な効果を示し,機能的なメカニズムを示唆した.
結論:
- ホスト遺伝的要因,特にインタールキン-1-βに影響を与えるインタールキン-1遺伝子クラスターの変異は,H. pylori感染の臨床結果を決定する上で重要な役割を果たします.
- 炎症を誘発するサイトカインであり,胃酸の分泌を阻害するインタールユーキン-1-βは,観察された関連を媒介する可能性があります.
- これらの遺伝的傾向を理解することは,なぜH. pyloriに感染した一部の個体だけが胃がんのような重症な疾患を発症するかを説明するのに役立ちます.
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