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Gastrulation01:56

Gastrulation

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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...
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Cell Migration01:19

Cell Migration

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Cell migration is a process by which the cells move from one location to another, playing an essential role in embryological development, repair and regeneration, immune response, and metastasis. Cells migrate in response to chemical or mechanical signals generated by specific organs or tissues. The overall mechanism includes three steps - polarization, protrusion, and release. Polarization involves the formation of a distinct cell front and rear, which determines the direction of movement.
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Morphogenesis02:19

Morphogenesis

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Plant morphogenesis—the development of a plant’s form and structure—involves several overlapping developmental processes, including growth and cell differentiation. Precursor cells differentiate into specific cell types, which are organized into the tissues and organ systems that make up the functional plant.
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Mechanism of Lamellipodia Formation01:31

Mechanism of Lamellipodia Formation

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Cells migrating in response to external stimuli form lamellipodia, which are thin membrane protrusions supported by a mesh of linked, branched, or unbranched actin filaments. These actin filaments interact with myosin motor proteins, creating the dynamic actomyosin complex within the cytoskeleton. Contractility, or the ability to generate contractile stress, is inherent to the actomyosin complex. It helps cells detect the stiffness of the surrounding ECM and exert contractile force for...
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Cell Motility through Blebbing01:16

Cell Motility through Blebbing

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Blebs are a type of membrane protrusion formed by the internal hydrostatic pressure of the cytoplasm. Blebs are observed in several cell types, including fibroblasts, immune cells, and single-celled organisms like the amoeba. The primary function of blebs is cell locomotion and apoptosis, but they are also found during necrosis and cell division. The life cycle of a bleb comprises an initiation phase followed by the expansion and retraction phases.
Blebbing Through the Matrix
In multicellular...
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相关实验视频

Updated: May 22, 2025

Engineering Three-dimensional Epithelial Tissues Embedded within Extracellular Matrix
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Engineering Three-dimensional Epithelial Tissues Embedded within Extracellular Matrix

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一个边界驱动的组织形态发生的模型.

Daniel S Alber1,2, Shiheng Zhao3,4,5, Alexandre O Jacinto6

  • 1Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08540.

ArXiv
|March 17, 2025
PubMed
概括
此摘要是机器生成的。

果 (Drosophila) 胚胎中的组织变形可能是被动的. 复杂的后肠形状变化是由周围组织运动引起的,而不是内部力量,为发育生物学提供了洞察力.

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相关实验视频

Last Updated: May 22, 2025

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科学领域:

  • 发展生物学 发展生物学
  • 生物物理学的生物物理.
  • 形态发生 形态发生 形态发生

背景情况:

  • 发育过程中的组织变形是活跃的 (内部) 或被动的 (边界驱动).
  • 德洛索菲拉后肠原体作为研究边界驱动组织形态发生的模型.

研究的目的:

  • 为了研究被动变形在形成Drosophila后肠中的作用.
  • 为了描述后肠原始体的3D变形和动力学.

主要方法:

  • 使用Drosophila后肠原始作为模型系统.
  • 在圆形表面上构建了一个最小的弹性环模型,以模拟变形.
  • 使用轮分析量化组织动力学.

主要成果:

  • 在后肠3D变形过程中确定了一个中间的三角形形状.
  • 证明周围的活体组织变形被动塑造后肠.
  • 显示的后肠变形发生在两个阶段:翻译和对称性破坏.
  • 对被动模型与观察到的轮运动学进行了验证.

结论:

  • 后肠形态发生是一种被动过程,由边界力和胚胎曲率驱动.
  • 统一的边界条件可以产生复杂的,不统一的形状变化.
  • 提供了一个框架,以了解整个生物体的发育系统的全球形态学和布拉斯托等价的形状.