神经能力和胃肠细胞系新生儿胚胎的内皮
1Department of Biology, Faculty of General Education Kumamoto University, Kumamoto 860, Japan.
Development, growth & differentiation
|June 7, 2023
概括
在Cynops pyrrhogaster ectoderm中,神经能力随着细胞分裂而迅速减弱. 在23°C的18小时后,外皮细胞失去形成神经结构的能力.
科学领域:
- 发展生物学 发展生物学
- 胚胎学 胚胎学
- 细胞生物学 细胞生物学
背景情况:
- 了解神经诱导的时间窗口在发育生物学中至关重要.
- 外皮形成神经结构的能力是早期胚胎发育的一个关键方面.
- 以前的研究还没有完全阐明细胞增殖和神经能力之间的定量关系.
研究的目的:
- 量化分析Cynops pyrrhogaster gastrula ectoderm神经结构形成能力的变化.
- 研究外皮老化,细胞增殖和神经能力丧失之间的相关性.
- 探索神经能力和细胞系在早期胃流动期间之间的关系.
主要方法:
- 在完整的和孤立的外皮体外物体中对神经结构形成的定量分析.
- 在特定的发育阶段 (12c-13b) 和文化前的时间点 (12-18小时) 监测探索的发展.
- 在23°C时同时检查早期胃肠外皮中的细胞增殖率.
主要成果:
- 神经结构形成频率的急剧下降发生在完整的外皮中,在12c和13b阶段之间.
- 隔离的外皮表现出12至18小时前培养期间神经能力的类似下降.
- 细胞增殖数据表明,所有外皮细胞在18小时内至少分裂一次,之后神经能力就会丧失.
结论:
- 在Cynops pyrrhogaster ectoderm中神经能力是短暂的,与细胞周期密切相关.
- 细胞分裂标志着外皮的衰老,导致神经能力的逐渐和最终完全丧失.
- 研究结果表明,细胞生成和细胞系在确定神经诱导时间方面发挥着重要作用.
相关概念视频
01:56Gastrulation
57.7K
Gastrulation establishes the three primary tissues of an embryo: the ectoderm, mesoderm, and endoderm. This developmental process relies on a series of intricate cellular movements, which in humans transforms a flat, “bilaminar disc” composed of two cell sheets into a three-tiered structure. In the resulting embryo, the endoderm serves as the bottom layer, and stacked directly above it is the intermediate mesoderm, and then the uppermost ectoderm. Respectively, these tissue strata...
57.7K
01:30Neurulation
42.1K
Neurulation is the embryological process which forms the precursors of the central nervous system and occurs after gastrulation has established the three primary cell layers of the embryo: ectoderm, mesoderm, and endoderm. In humans, the majority of this system is formed via primary neurulation, in which the central portion of the ectoderm—originally appearing as a flat sheet of cells—folds upwards and inwards, sealing off to form a hollow neural tube. As development proceeds, the...
42.1K
01:51Determination
18.6K
During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In...
18.6K