基底状態の腸幹細胞のクローン化と変異
Xia Wang1, Yusuke Yamamoto1, Lane H Wilson2
1The Jackson Laboratory for Genomic Medicine, Farmington, Connecticut 06032, USA.
Nature
|June 5, 2015
まとめ
研究者はヒトの腸および結腸の幹細胞をクローンに成功し,それらの幹細胞が正確な分化パターンを維持していることを発見しました. これらの安定した,クローン可能な幹細胞は,疾患モデリングと再生医療の可能性を秘めています.
科学分野:
- 胃腸内科 胃腸内科
- 幹細胞生物学 幹細胞生物学
- 皮質生物学 エピテリア生物学
背景:
- 胃腸,臓,肝臓の幹細胞は,通常,その基本的な形態でクローン化に抵抗します.
- 幹細胞の行動を理解することは,組織再生と疾患の研究に不可欠です.
研究 の 目的:
- ヒトの腸および結腸の幹細胞をクローンして"基底状態"に増殖させる.
- これらのクローン幹細胞の安定性と分化コミットメントを調査する.
- 疾患モデリングと再生医療におけるこれらの幹細胞の潜在能力を探求する.
主な方法:
- ヒトの腸および結腸の幹細胞のクローニングとシリアルパッシング.
- 幹細胞の系統におけるコピー数と配列変化の分析.
- 細胞自律的分化コミットメントの評価.
- 複製的に派生した結腸内皮質を用いて,Clostridium difficile感染症のモデリング.
主要な成果:
- ヒトの腸と結腸の幹細胞を高度にクローノジェニックな"グラウンドステート"でクローン化して繁殖させることに成功した.
- 派生幹細胞の系統は,広範囲にわたる伝播にもかかわらず,限られた多様性を示した.
- エピテリアの分化に対する正確な,細胞自律的なコミットメントが実証されており, in vivo の起源を反映しています.
- 結腸内皮質は,クローストリジウム・ディフィシル毒素AまたはBに曝露したときに再現された擬膜性大腸炎の特徴を示しています.
結論:
- これらの幹細胞における表遺伝的に維持されたコミットメントプログラムは,成人の腸管の機能的特異性を強制する.
- これらの幹細胞の安定性,クローン遺伝性,複製能力は,疾患モデリングに有利です.
- これらの発見は,再生医療および胃腸疾患の理解における潜在的な応用を強調しています.
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