在D. discoideum发育过程中观察到的Dictyostelium mucoroides细胞表现出细胞周期依赖的分类行为
1Biological Institute, Graduate School of Science, Tohoku University, Aoba, Sendai 980-77, Japan.
Development, growth & differentiation
|June 7, 2023
概括
饥饿开始时的细胞周期阶段会影响Dictyostelium mucoroides的发育. 早期的G2饥饿细胞聚集得更快,移动到后部,而中后期的G2细胞移动得更慢到前部.
科学领域:
- 发展生物学 发展生物学
- 细胞生物学 细胞生物学
- 遗传学 遗传学 是一个
背景情况:
- 细胞周期进展是细胞分化和模式形成的关键因素.
- 之前对Dictyostelium discoideum Ax2的研究表明,在发育过程中依赖细胞周期进行分类.
- 这种现象在不同的Dictyostelium物种中的普遍性仍然在很大程度上未被探索.
研究的目的:
- 为了研究非同步的Dictyostelium mucoroides-7 (Dm7) 细胞中是否发生细胞周期依赖的分类.
- 确定Dm7.7中饥饿开始时的细胞周期阶段与随后的细胞分类行为之间的关系.
- 将Dm7的分类模式与D. discoideum中观察到的分类模式进行比较.
主要方法:
- 使用非同步的Dm7细胞,用5'--2-脱氧氨 (BrdU) 进行脉冲标记,以跟踪细胞周期进展.
- 分析了细胞的聚合速度和最终位置,基于它们在饥饿时的细胞周期阶段.
- 测量细胞数量和核度,以评估形后的细胞周期进展.
主要成果:
- 在早期G2阶段饥饿的Dm7细胞表现出快速聚合,并排序到后面的前区域.
- 在G2阶段中后期饥饿的细胞显示聚合速度较慢,并将其分类到前部 (尖端) 区域.
- 大约80%的细胞在堆形成后继续细胞周期进展,与前分化相关.
结论:
- 饥饿开始时的细胞周期阶段显著影响D. mucoroides的细胞分类和模式形成.
- 观察到的Dm7的分类行为与D. discoideum的分类行为相似,这表明保存机制.
- 在Dictyostelium发育过程中依赖细胞周期的分类可能是跨物种的常见现象.
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