臨床的および実験的な心不全における制御不良のオステオプロテゲリン/RANKリガンド/RANK軸
Thor Ueland1, Arne Yndestad, Erik Øie
1Research Institute for Internal Medicine, Medical Department, Rikshospitalet University Hospital, Oslo, Norway. thor.ueland@medisin.uio.no
Circulation
|May 11, 2005
まとめ
骨代謝に関与するOPG/RANK/RANKL軸は,心不全 (HF) の病原化に関与しています. 心臓組織と血清におけるこれらのメディエーターの発現の増加は,これらのメディエーターがHFの治療標的である可能性を示唆する.
科学分野:
- 心血管研究 循環器科の研究
- 免疫学 免疫学とは
- 骨の代謝についてです.
背景:
- 持続的な炎症は,心不全 (HF) の発症に関連しています.
- オステオプロテゲリン (OPG),RANK,RANKLは,骨と免疫反応を調節するTNFスーパーファミリーのメンバーです.
- HFの病原性におけるOPG/RANK/RANKL軸の役割が調査されました.
研究 の 目的:
- 心不全 (HF) の病原性におけるOPG/RANK/RANKL軸の関与を調査する.
- OPG/RANK/RANKL軸を実験的および臨床的なHFモデルの両方で探求する.
主な方法:
- ネズミの心臓発作後のHFモデルにおける遺伝子発現分析.
- ヒトHF心筋組織におけるタンパク質レベル分析と免疫ヒスト化学.
- 人間のHF患者におけるRANKLとOPGの全身表現分析.
- 人間の線維芽細胞におけるマトリックスメタルプロテインアース活性に対するRANKLの効果に関するインビトロ研究.
主要な成果:
- OPG,RANK,RANKLの遺伝子発現の増加が,HF.ラットにおける不全性および非不全性心臓組織で認められた.
- 人間のHFで心筋内OPG,RANK,RANKLタンパク質のレベルが上昇し,心筋細胞に局限する.
- 人間のHFにおける全身的なRANKLおよびOPGレベルの増加は,疾患の重症度と相関しています.
- RANKLは,マトリックスメタルプロテインアース活性を増強し,LV機能不全の役割を示唆しました.
結論:
- 骨ホメオスタシスとして知られるOPG/RANK/RANKL軸は,HFの病原化に役割を果たす可能性がある.
- これらの発見は,心不全の潜在的な新しい治療標的を特定します.
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