新芽芽胚胎的分期和初级中皮层能力的第一次出现
Naoi Sasaki1, Kyoko Iwamoto1, Shinichi Noda1
1Department of Biology, Faculty of Science, Kyushu University, 33, Fukuoka 812, Japan.
Development, growth & differentiation
|June 7, 2023
概括
这项研究研究了新胚胎中的中皮层能力,发现假设的外皮层在6-7细胞阶段左右,大约在胃化开始前4-8小时,对鱼游泳膀组织的诱导变得敏感.
科学领域:
- 发育生物学是发展生物学.
- 胚胎学 胚胎学
- 细胞生物学 细胞生物学
背景情况:
- 了解发育事件的时间在胚胎学中至关重要.
- 中皮诱导是脊椎动物早期发育的一个关键过程.
- 新 (Triturus pyrrhogaster) 和鱼 (Carrasius auratus) 是已建立的模型生物体,用于发育研究.
研究的目的:
- 为了确定新假定ectoderm获得 mesodermal 能力的最早时间点.
- 研究鱼游泳膀组织在新胚胎外皮上的诱导能力.
- 与特定的胚胎发育阶段相关联中皮层能力的出现.
主要方法:
- 鱼的游泳膀被用作一个感应器.
- 在各种胃前阶段使用了新胚胎 (Triturus pyrrhogaster).
- 通过在动物杆上计数表面细胞来评估发育时间.
- 假定的外皮被暴露在诱导器中,持续时间不同 (胃口阶段至少15分钟,胃口前阶段30分钟).
主要成果:
- 据推测,来自新胚胎的4-5个细胞的外皮 (约. 14-12小时前消化) 没有表现出间皮诱导.
- 第一次观察到介皮能力是在6-7个细胞的胚胎的假定外皮 (ectoderm) 中. 8-6个小时的胃化前).
- 与诱导器的最低接触时间为15分钟,足以在早期胃肠阶段的外皮中诱导.
结论:
- 新的胚胎外皮在一个狭窄的发育窗口内获得了中皮能力.
- 这种能力在胃流动开始前大约4-8小时就出现了.
- 鱼游泳膀作为一个有效的诱导器,用于新胚胎中中皮发育.
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