胎児の造血性幹細胞の細胞および発達特性
C T Jordan1, J P McKearn, I R Lemischka
1Department of Biology, Princeton University, New Jersey 08544-1014.
Cell
|June 15, 1990
まとめ
研究者らは,胎児の肝臓における原始的造血性幹細胞を分離するために,新しい細胞表面マーカーであるAA4.1を特定した. このマーカーは,さらなる研究のために全能幹細胞群を定義するのに役立ちます.
科学分野:
- 血液学 ヘマトロジ
- 発達生物学 発達生物学について
- 幹細胞生物学 幹細胞生物学
背景:
- 造血幹細胞 (HSC) は,血液系の発達に不可欠です.
- 原始的なHSC集団を特定し隔離することは,血液形成を理解するために不可欠です.
- HSCの分離のための現在の方法は,原始細胞の完全な階層を捉えることができないかもしれません.
研究 の 目的:
- 胎児のトーティポテント血液形成性幹細胞を隔離し,特徴づけるための新しい戦略を開発する.
- 原始的造血細胞集団を定義する特定の細胞表面マーカーを特定する.
- 幹細胞集団の同時隔離とインビボの特徴づけを可能にする.
主な方法:
- 細胞の性質と in vivo 発達行動の統合された物理的および遺伝的分析.
- モノクローナル抗体AA4.1を用いて,細胞表面マーカーを特定した.
- 密度,フィブロネクチン結合,および表面抗原分布に基づいて分断された細胞.
主要な成果:
- 細胞表面マーカーAA4.1は,原始的血液生成細胞を含む胎児の肝臓組織の0.5%~1.0%を識別します.
- AA4.1+亜集団には,多潜在的原始体,CFU-S細胞,リンパ性-骨髄性幹細胞が含まれています.
- 更に分化すると,胎児肝細胞の0.1%~0.2%のサブセットが,全能幹細胞を含むことが判明した.
結論:
- モノクローナル抗体AA4.1は,原始的造血性幹細胞を分離するための重要なマーカーです.
- 物理的および遺伝的分析を統合した新しい戦略により,幹細胞の包括的な特徴づけが可能です.
- この研究は,胎児の血球形成の階層内の全能幹細胞の識別を洗練しています.
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