在原始链条延伸期间和之后,中线模式对线粒分裂的差异敏感性
bioRxiv : the preprint server for biology
|November 1, 2024
概括
早期的胚胎发育需要进行线粒分裂以延长原始的线条,但在这个阶段之后的中线模式对线粒细胞的停滞有抵抗力,并且不太依赖平面细胞极性信号.
科学领域:
- 发育生物学是发展生物学.
- 胚胎发生是胚胎发生.
- 细胞信号传递 细胞信号传递
背景情况:
- 中线的建立对于双边胚胎生成至关重要.
- 非氨基生物使用平面细胞极性 (PCP) 信号来表示中线图案,而无需进行线粒分裂.
- 羊虫利用细胞增殖和PCP用于早期的中线模式,包括原始链条 (PS).
研究的目的:
- 为了研究线粒分裂和PCP在胚胎中线图案中的作用,在原始链条延伸后.
主要方法:
- 在胚胎中,在后原始链条延伸阶段诱导了 mitotic arrest.
- 进行了形态和分子分析 (标记基因).
- 使用Morpholino Knockdown评估了Prickle-1的表达和功能.
主要成果:
- 胚胎在线粒停留下保持了心弦延伸和原始串回回归,但显示了缩小大小和失去横向性.
- 大多数PCP核心组件没有被检测到在Notochord-Hensen的节点-原始链条区域后原始链条延伸.
- 皮克尔-1的淘汰主要影响了胚胎生长,而不是中线模式.
- 线粒体的停止导致中线组织的细胞缩.
结论:
- 在早期胚胎中线模式中存在两种不同的线粒分裂敏感性阶段.
- 原始链条延伸需要线粒分裂和PCP.
- 后原始串延伸中线模式在很大程度上抵抗了线粒体的停止,并显示了最小的PCP影响.
相关概念视频
01:56Gastrulation
56.7K
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...
56.7K
02:13Determining the Plane of Cell Division
3.3K
Positioning the cell division plane is a critical step during development and cell differentiation, particularly during mitosis when the plane is essential for determining the size of the two daughter cells. The cell division plane is perpendicular to the plane of chromosome segregation, but different types of organisms have different cell division mechanisms to suit their morphology and function.
Animal cells
In animal cells, the cleavage furrow forms along the plane of cell division...
Animal cells
In animal cells, the cleavage furrow forms along the plane of cell division...
3.3K
01:51Determination
18.2K
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...
18.2K