AML1は,ヒト白血病における多重染色体転位の標的であり,正常な胎児肝臓の血液形成に不可欠である
T Okuda1, J van Deursen, S W Hiebert
1Department of Pathology and Laboratory Medicine, St. Jude Children's Research Hospital Memphis, Tennessee 38105, USA.
Cell
|January 26, 1996
まとめ
AML1転写因子は,決定的な血液形成に極めて重要です. AML1が欠けているマウスは,重度の血液形成の欠陥を示し,すべての血液細胞系統に影響を与え,胚の致死につながり,その重要な役割を強調します.
科学分野:
- 血液学 ヘマトロジ
- 分子生物学は分子生物学である.
- 発達生物学 発達生物学とは
背景:
- AML1-CBFベータ転写因子複合体は,ヒト白血病で頻繁に変化します.
- AML1の正常な機能を理解することは,白血病の研究にとって非常に重要です.
研究 の 目的:
- 正常な血液形成におけるAML1転写因子の重要な役割を調査する.
- 胚の発達中のAML1欠乏症の影響を決定する.
主な方法:
- ホモジゴス型AML1変異 (AML1-/-) を有するマウスの生成.
- 胚の発達,卵黄袋,胎児の肝臓の血液形成の分析.
- AML1-/- ES細胞のインビトロ分化アッセイ.
- 血液形成への幹細胞の貢献度を評価するためのキメリック動物研究.
主要な成果:
- AML1-/-胚は正常な形質変異を示したが,胎児肝臓の血液形成が欠け,胚の12.5.5日頃に死亡した.
- ミエロイド系と赤血球系の両方の決定的な造血祖先は,卵黄袋と胎児の肝臓には存在しなかった.
- AML1-/- ES細胞は,実験室で原始的な赤血球細胞に微分化することができたが,キメリック動物における血液形成に寄与することはできなかった.
- 造血欠陥は,AML1欠乏性幹細胞に内在していた.
結論:
- AML1は,すべての血液系における決定的な血液形成に不可欠です.
- AML1調節された標的遺伝子は,胎児肝臓の血液生成性幹細胞の発達に不可欠です.
- これらの発見は,AML1が白血病の発症を予防する上で果たす重要な役割を強調しています.
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