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鼠标黑色素瘤细胞的分化:初始可逆性和一个启动-关闭的随机模型

|September 1, 1983

概括

细胞分化的承诺是可变的,与黑色素瘤细胞的细胞分裂无关. 发生了差异化的逆转,与扩散相关的脱差,这表明了一个动态的开/关开关模式.

科学领域:

细胞生物学细胞生物学
发育生物学是发展生物学.
癌症研究癌症研究

背景情况:

哺乳动物细胞分化是一个复杂的过程.
被称为"承诺"的随机事件被认为是启动差异化的关键.
了解控制分化的精确机制对于发育生物学和癌症研究至关重要.

研究的目的:

调查随机约束在哺乳动物细胞分化中的作用.
用B16C3小鼠黑色素瘤细胞测试现有的细胞分化理论.
识别可能与当前模型不一致的黑色素瘤细胞分化的特性.

主要方法:

在B16C3小鼠黑色素瘤细胞中使用时隔膜观察色素的产生.
克隆单细胞中的分化分析.
选择实验,以评估差异化变异性的遗传基础.

主要成果:

不同化的发病时间在细胞之间差异很大,遗传影响很小.
细胞分裂与分化没有相关性.
姐妹细胞显示相关的分化时间,分化是可逆的,特别是在低色素水平.
脱差与细胞增殖有关,导致较小的有色素和较大的无色素克隆.

结论:

现有的随机约束理论不能完全解释黑色素瘤细胞分化.
提出了一个修订后的模型,其中差异化函数可以动态打开和关闭.
"关闭"过渡的抑制在"开启"状态中积累,影响分化的可逆性和扩散协会.

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