胆道縮症の小児におけるプロ炎症性免疫の遺伝的誘導
Jorge A Bezerra1, Greg Tiao, Frederick C Ryckman
1Division of Pediatric Gastroenterology, Children's Hospital Medical Center and University of Cincinnati, Cincinnati, OH 45229, USA. jorge.bezerra@chmcc.org
Lancet (London, England)
|November 30, 2002
まとめ
胆管不動症は,乳児の肝臓における免疫遺伝子の調整された活性化を伴うもので,オステオポントンとインターフェロン・ガンマは,Tヘルパー1免疫が疾患発現における役割を示唆している.
科学分野:
- 小児肝臓病理学 小児肝臓病理学
- 分子生物学は分子生物学である.
- 免疫学 免疫学とは
背景:
- 胆管不全は,幼児の黄と小児の肝移植の主要な原因です.
- 胆道不動症の病因と病原性は,ほとんど不明のままである.
- ゲノム学的アプローチは,多因子の乳児肝疾患を理解するために不可欠です.
研究 の 目的:
- 乳児における胆道不動症に関連したゲノムシグネチャーを特定する.
- 胆管不全の病原性に基づく分子メカニズムを調査する.
主な方法:
- 胆道不動症の乳児と対照群の肝臓組織におけるオリゴヌクレオチドマイクロアレイを用いた遺伝子発現プロファイリング.
- 遺伝子発現の変化と免疫細胞の関与の確認は,免疫ヒスト化学と逆転写酵素-ポリメラーゼ連鎖反応 (RT-PCR) を用いて行われます.
主要な成果:
- 免疫と炎症に関連する遺伝子の調整された活性化は,胆管不全の肝臓で観察されました.
- T-ヘルパー1 (Th-1) 免疫応答を示すオステオポントンとインターフェロンガンマの上昇が観察されました.
- 免疫グロブリン遺伝子の抑制は,胆管不全と対照群における同様の炎症性浸透にもかかわらず,初期の段階で観察されました.
結論:
- 乳児の胆道不動症は,リンパ球分化経路における調整された遺伝子活性化によって特徴付けられます.
- オステオポントンとゲンマインターフェロンの過剰発現は,胆道不全の病原性におけるTh-1サイトカインの有意な役割を示唆する.
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