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合同性メゼンキマ幹細胞移植は,心筋梗塞後のネズミの心筋梗塞:短期および長期の効果
Wangde Dai1, Sharon L Hale, Bradley J Martin
1The Heart Institute, Good Samaritan Hospital, Division of Cardiovascular Medicine of Keck School of Medicine at University of Southern California, Los Angeles, CalifA 90017, USA.
Circulation
|July 7, 2005
まとめ
メゼンキマ幹細胞 (MSC) は,ネズミの心筋梗塞後に一時的に心臓機能を改善しました. MSCは6ヶ月間生存し,いくつかの心臓マーカーを示したが,機能的利益は一時的であり,パラクリン効果を示唆した.
科学分野:
- 再生医学は,再生医療である.
- 心血管科学の研究について
- 幹細胞生物学 幹細胞生物学
背景:
- メセンキマル幹細胞 (MSC) は,心筋梗塞の傷痕組織を代替する可能性があることを示しています.
- 心臓機能に対するMSC移植の長期的な影響は,依然としてほとんど不明です.
- 本研究では,マウスモデルでの心筋梗塞 (MI) 以後の左心室 (LV) 機能に対するMSCの短期的および長期的な影響を調査しています.
研究 の 目的:
- ミョコ心臓梗塞のラットモデルにおける左心室 (LV) 機能に対するメゼンキマ幹細胞 (MSC) 移植の短期的および長期的な効果を評価する.
- 心筋梗塞における移植されたMSCの生存,分化,および機能的貢献を評価する.
主な方法:
- DiIで標識されたメゼンキマル幹細胞 (MSC) は, infarction の1週間後のラットの心筋の傷痕に注入されました.
- 対照群は塩素注射を受けた.
- 射出分数と脳卒中の容量を含む左心房 (LV) の機能は,4週間と6ヶ月で評価されました.
- 移植細胞の存在,分化 (筋肉特異的マーカー),および現象型を分析した.
主要な成果:
- 移植後の4週間で,MSC治療は,塩素対照と比較して,LVストロークの体積とエジェクション分数を有意に増加させた.
- これらの機能的改善は,6ヶ月のフォローアップで持続しませんでした.
- DiIで標識されたMSCは6ヶ月で検出され,いくつかの筋肉および内皮マーカーを発現したが,成人心臓細胞に完全に成熟しなかった.
結論:
- アロゲン性MSCは,心筋梗塞で少なくとも6ヶ月生存することができる.
- MSCは,移植後の4週間で,全体的なLV機能の一時的な改善を示した.
- 機能的利点の一時的な性質は,心筋梗塞の回復におけるMSCsの早期のパラクリン作用機構の可能性を示唆しています.
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