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Related Concept Videos

Neurulation01:30

Neurulation

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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...
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Frictional Force01:07

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When a body is in motion, it encounters resistance because the body interacts with its surroundings. This resistance is known as friction, a common yet complex force whose behavior is still not completely understood. Friction opposes relative motion between systems in contact, but also allows us to move. Friction arises in part due to the roughness of surfaces in contact. For one object to move along a surface, it must rise to where the peaks of the surface can skip along the bottom of the...
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Dry Friction01:30

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Dry friction occurs between two solid surfaces in contact as they attempt to move relative to one another. In daily life, dry friction is encountered in various forms, such as when walking on the ground, sliding an object across a table, or rubbing hands together. Despite its ubiquity, the underlying mechanisms behind dry friction are not readily visible.
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Cell Migration01:19

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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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Cell Migration01:09

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Cell migration, the process by which cells move from one location to another, is essential for the proper development and viability of organisms throughout their life. When cells are not able to migrate properly to their ordained locations, various disorders may occur. For example, disruption in cell migration causes chronic inflammatory diseases such as arthritis.
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Static and Kinetic Frictional Force01:05

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One of the simpler characteristics of sliding friction is that it is parallel to the contact surfaces between systems, and is always in a direction that opposes the motion or attempted motion of the systems relative to each other. If two systems are in contact and moving relative to one another, then the friction between them is called kinetic friction. For example, kinetic friction slows a hockey puck sliding on ice.
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Related Experiment Video

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An Explant Assay for Assessing Cellular Behavior of the Cranial Mesenchyme
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Friction forces position the neural anlage.

Michael Smutny1, Zsuzsa Ákos2, Silvia Grigolon3

  • 1Institute of Science and Technology Austria, Am Campus 1, A-3400 Klosterneuburg, Austria.

Nature Cell Biology
|March 28, 2017
PubMed
Summary

Friction forces between migrating cell layers in zebrafish embryos drive tissue rearrangement and position the neural Anlage. This mechanical process is crucial for embryonic development and morphogenesis.

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Area of Science:

  • Developmental biology
  • Biophysics
  • Cell biology

Background:

  • Mechanical forces are critical for embryonic development and tissue morphogenesis.
  • Cellular rearrangements are driven by physical interactions during embryogenesis.

Purpose of the Study:

  • To investigate the role of friction forces at the interface of migrating tissues in early zebrafish embryonic development.
  • To understand how these forces influence neurectoderm cell positioning and neural Anlage formation.

Main Methods:

  • Experimental analysis of early zebrafish embryos.
  • Computational simulations to model cell interactions.
  • Utilizing E-cadherin-mediated adhesion as a key factor.

Main Results:

  • Friction forces identified at the interface between anterior axial mesoderm (prechordal plate, ppl) and neurectoderm progenitors.
  • These forces induce global cell rearrangement within the neurectoderm.
  • Hydrodynamic coupling, mediated by E-cadherin, is essential for this process.

Conclusions:

  • Friction forces emerging at tissue interfaces are critical for shaping the embryo.
  • This mechanism highlights the importance of mechanical interactions in establishing embryonic structures.
  • The study reveals a novel force-generating process in developmental mechanics.