精製されたポリペプチドによる多能胚性幹細胞の分化抑制
A G Smith1, J K Heath, D D Donaldson
1Department of Biochemistry, University of Oxford, UK.
Nature
|December 15, 1988
まとめ
ネズミの胚性幹細胞 (ES細胞) は,持続的な多能性のために特定の要因を必要とします. この分化阻害活性 (DIA) は,構造的にも機能的にも白血病阻害因子に関連しており,胚性および血球形成性幹細胞の両方に影響を及ぼします.
科学分野:
- * 発達生物学について
- * 幹細胞生物学について
- * 血液形成は血液形成である.
背景:
- *ネズミの胚性幹細胞 (ES細胞) は多能であり,初期の胚から派生しています.
- * ES細胞は,すべての成人の組織に微分化し,生殖系統に寄与することができます.
- * 初期の発達を研究し,トランス遺伝子動物を生成するためのモデルとして機能します.
研究 の 目的:
- * ES細胞の分化を制御するポリペプチド因子を特定する.
- * バッファローネズミの肝細胞条件付け媒介からES細胞分化阻害活性 (DIA) の役割を調査する.
- * 長期培養中にDIAがES細胞の多能性を維持するかどうかを判断する.
主な方法:
- * DIAを含む媒体のマウリンES細胞の培養.
- * バッファロー・ラットの肝細胞調節媒介からDIAの浄化.
- * DIAの構造と機能の比較は,既知の血液形成の調節因子と比較した.
主要な成果:
- * DIAは,ES細胞の自発的な分化を in vitro で抑制し,均質な幹細胞培養を可能にします.
- * 発芽細胞の可能性を含むES細胞の多能性は,DIAによる長時間培養中に維持されます.
- * 浄化されたDIAは,DA細胞と白血病抑制因子に対するヒトのインタールイキンと構造的,機能的な類似性を示しています.
結論:
- * DIAは,ES細胞の多能性と自己再生を維持する重要な要因です.
- * DIAと白血病抑制因子は,関連する多機能的調節因子です.
- * これらの要因は,胚性および血液形成性幹細胞システムにおいて,異なる生物学的活動を示す.
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