长期在体内复制T细胞发育的Pax5缺陷B细胞前代的T细胞
A G Rolink1, S L Nutt, F Melchers
1Basel Institute for Immunology, Switzerland. rolink@bii.ch
Nature
|October 19, 1999
概括
帕克斯5对于B-淋巴细胞系的承诺至关重要. 研究表明,缺乏Pax5的细胞可以变成T细胞,这表明承诺不仅仅取决于其他已知的因素.
科学领域:
- 免疫学 免疫学 免疫学
- 发展生物学 发展生物学
- 分子生物学分子生物学
背景情况:
- 血造原始体对B-淋巴细胞血统的承诺是不太了解的.
- 转录因子E2A和EBF,以及RAG/TdT或B细胞前受体基因的表达,此前被认为表明B谱系的承诺.
研究的目的:
- 为了研究转录因子Pax5在B-淋巴细胞谱系中的作用.
- 为了确定E2A,EBF或免疫球蛋白重排序机制基因是否足以进行B细胞结合.
主要方法:
- 克隆的Pax5缺乏的B细胞被移植到RAG2缺乏的小鼠体内.
- 这些转移细胞的起源和分化潜力在体内进行了分析.
- 二级接受者被用来评估长期回归和复制能力.
主要成果:
- 缺乏Pax5的亲B细胞重建了胸腺,并分化为成熟的T细胞.
- 这些T细胞表达了α/βT细胞受体.
- 骨髓中缺乏Pax5的细胞保持了亲B细胞表型,并且可以在二次接受者中重新填充胆髓.
结论:
- 通过免疫球蛋白DJ重新排列或E2A,EBF,lambda5,VpreB,Igalpha或Igbeta的表达来确定B血统的承诺.
- 转录因子Pax5在控制B-淋巴细胞系承诺方面发挥着至关重要的作用.
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