人类白血病多重染色体转位的目标AML1,对于正常的胎儿肝脏造血是必不可少的
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
概括
AML1转录因子对于最终的血液形成至关重要. 缺少AML1的小鼠表现出严重的造血缺陷,影响所有血细胞系,导致胚胎死亡,突出其重要作用.
科学领域:
- 血液学 血液学 血液学
- 分子生物学分子生物学
- 发育生物学 发展生物学
背景情况:
- 在人类白血病中,AML1-CBFβ转录因子复合体经常发生变化.
- 了解AML1的正常功能对于白血病研究至关重要.
研究的目的:
- 研究AML1转录因子在正常血液形成中的重要作用.
- 为了确定AML1缺乏在胚胎发育过程中的后果.
主要方法:
- 产生具有同卵性AML1突变 (AML1-/-) 的小鼠.
- 对胚胎发育,黄囊和胎儿肝脏血液形成的分析.
- 在AML1-/- ES细胞的体外分化试验.
- 化学动物研究,以评估干细胞对造血的贡献.
主要成果:
- AML1-/- 胚胎表现出正常的形态发生,但缺乏胎儿肝脏血液形成,在 12.5.5 胚胎日左右死亡.
- 在黄囊和胎儿肝脏中,骨髓和红细胞血统的确定的造血原始体都不存在.
- 在实验室中,AML1-/- ES细胞可以分化为原始的红状腺细胞,但未能在嵌合体动物中促进血液形成.
- 造血缺陷是AML1缺陷干细胞固有的.
结论:
- 在所有血系中,AML1对于最终的血液形成至关重要.
- AML1调节的基因对于胎儿肝脏造血干细胞的发展是不可或缺的.
- 这些发现强调了AML1在预防白血病发展方面的关键作用.
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