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Related Concept Videos

Cytoskeletal Coordination in Cell Migration01:32

Cytoskeletal Coordination in Cell Migration

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A migrating cell changes its shape during the cyclic events of attachment and detachment from the substratum and repositions the cell organelles correspondingly. These complex events are orchestrated by the dynamic cytoskeletal network comprising actin filaments, intermediate filaments, and microtubules. Cytoskeletal crosstalk — the direct and indirect communication between the different components — is crucial for this coordination. Direct communication involves various linker...
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Cell Migration01:09

Cell Migration

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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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Chemotaxis and Direction of Cell Migration01:21

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Cells can detect chemical cues in their environment and reorganize the cytoskeleton to migrate toward them or away from them. This directional migration, called chemotaxis, is essential during embryogenesis and development, immune response, tissue repair and regeneration, and reproduction. These chemical cues can either attract or repel the cell's movement. For example, axon development is determined by a combination of chemoattractants and chemorepellents that direct the growing axon...
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Role of Myosin in Cell Migration01:18

Role of Myosin in Cell Migration

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Myosins are multimeric motor proteins involved in various cellular processes such as migration, adhesion, and proliferation. Myosin II is the most common type in animal cells, which binds and cross-links actin filaments.
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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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Determining the Plane of Cell Division02:13

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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. 
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Related Experiment Video

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Study of Cell Migration in Microfabricated Channels
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Predictive Model for Cell Positioning during Periodic Lateral Migration in Spiral Microchannels.

Kai Zheng1, Zhaomiao Liu2, Yan Pang2

  • 1College of Mechanical and Energy Engineering, Beijing University of Technology, Beijing 100124, China.

Analytical Chemistry
|October 22, 2024
PubMed
Summary

A new mathematical model predicts cell position in spiral microchannels, improving precision for cell isolation. This model accounts for cell migration, microchannel design, and flow conditions for accurate results.

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Area of Science:

  • Biomedical Engineering
  • Fluid Dynamics
  • Microfluidics

Background:

  • Cell isolation in spiral microchannels suffers from low precision due to periodic lateral cell migration.
  • Understanding and predicting this migration is crucial for optimizing microfluidic devices.

Purpose of the Study:

  • To develop a mathematical predictive model (PM) for cell lateral position during migration in spiral microchannels.
  • To identify key microchannel structural and flow parameters influencing cell migration characteristics.

Main Methods:

  • Derived a mathematical predictive model (PM) for cell lateral position.
  • Analyzed relationships between migration parameters, microchannel structure, and flow conditions.
  • Determined empirical coefficients for the predictive model through experimental validation.

Main Results:

  • Microchannel aspect ratio and Reynolds number (Re) significantly impact cell migration periodicity.
  • Lateral migration width depends on Re, cell blockage ratio, and microchannel curvature.
  • Microchannel inlet structure and flow rate ratios are critical for regulating initial cell position.

Conclusions:

  • The developed PM accurately predicts cell lateral positions, validating its effectiveness.
  • This research enhances understanding of cell migration in spiral microchannels.
  • Findings offer practical guidance for designing and optimizing microfluidic chips for precise cell isolation.