調節性T細胞のダイナミックな変化は,食事による高コレステロール血症のレベルと関連しています
Elena Maganto-García1, Margarite L Tarrio, Nir Grabie
1Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, 77 Ave Louis Pasteur, NRB 7, Boston, MA 02115, USA.
Circulation
|June 22, 2011
まとめ
長期にわたる高コレステロールは,動脈硬化性病変における調節性T細胞 (Treg) を損なう. 高コレステロールを逆転させることでTregを保存することができ,コレステロールを低下させる治療法が動脈硬化症のTregバランスを改善することを示唆しています.
科学分野:
- 免疫学 免疫学とは
- 心血管科学の研究について
- 動脈硬化症の病原性 病原性
背景:
- 調節性T細胞 (Treg) は動脈硬化性病変に浸透し,疾患の進行に影響を与えます.
- 高コレステロール血症中のTregダイナミクスを理解することは,治療戦略にとって極めて重要です.
研究 の 目的:
- 長期にわたる高コレステロール血症と動脈硬化症の進行中のTreg応答の変化を調査する.
- 病変内のTreg集団に対する高コレステロール血症の逆転の影響を評価する.
主な方法:
- 使用された低密度リポプロテイン受容体ゼロマウスは,コントロールまたはコレステロール豊富な食事を与えられた.
- リンパ性組織と大動脈における緑色光タンパク質陽性Treg細胞の定量化.
- ダイエット介入に対する反応としてTレグ機能,アポトーシス,T細胞比を評価した.
主要な成果:
- コレステロールダイエットを長期間続けると臓Treg数が増加したが,4週間後にはTregが減少した.
- 高コレステロール血症は,Tregの内皮への結合を低下させ,Tregのアポトーシスを増加させた.
- 4週間後のダイエット逆転は,Tregの病変を維持し,病変の成長を停止しました.
結論:
- 長期にわたる高コレステロール血症は,動脈硬化性病変におけるTreg蓄積に悪影響を及ぼします.
- 高コレステロール血症の逆転は,Tregの損失を予防し,有益なTreg:エフェクターT細胞比率を潜在的に回復させることができます.
- コレステロールを下げる治療法は,動脈硬化症におけるTreg応答を調節する戦略を提供することができる.
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