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在Hoxb8突变小鼠中病理修饰的造血源
Shau-Kwaun Chen1, Petr Tvrdik, Erik Peden
1Howard Hughes Medical Institute, Department of Human Genetics, University of Utah School of Medicine, Salt Lake City, UT 84112, USA.
Cell
|June 1, 2010
概括
强迫性理在Hoxb8突变小鼠中,类似于人类的三病,是由骨髓衍生的微质细胞引起的. 这项研究将理缺陷与感官缺陷分开,将免疫细胞与强迫行为联系起来.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 免疫学 免疫学 免疫学
背景情况:
- 鼠标Hoxb8突变体表现出强迫性理和脱毛,其行为类似于人类的三病.
- 这种Hoxb8突变体的行为缺陷的根本原因以前是不清楚的,因为Hox基因破坏的类效应.
研究的目的:
- 为了确定对Hoxb8突变小鼠强迫性理表型负责的细胞类型.
- 为了研究理缺陷,感官缺陷和Hoxb8基因之间的关系.
- 探索微质在强迫性行为中的作用.
主要方法:
- 使用了Hoxb8突变小鼠和野生类型的骨髓移植.
- 对Hoxb8基因进行了细胞类型特定的破坏.
- 分析了行为表型 (修饰) 和感官功能.
主要成果:
- Hoxb8细胞系专门标记了大脑中的骨髓衍生微质.
- 将野生类型的骨髓移植到Hoxb8突变小鼠中,挽救了强迫性理现象型.
- 发现理表型可以从感觉缺陷中分离出来,前者起源于造血系 (微细胞),后者来自脊髓细胞.
结论:
- 在Hoxb8突变小鼠中,强迫性理与微质细胞的缺陷直接相关,该缺陷来自造血系.
- 这项研究表明,在Hoxb8突变体中,理和感官表型具有可分离的遗传基础.
- 突变微质细胞因果关系与明显的强迫行为障碍有关,突出显示免疫功能障碍和神经精神病学行为之间的联系.
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