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A Gradient-generating Microfluidic Device for Cell Biology
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The microfluidic lighthouse: an omnidirectional gradient generator.

A Nakajima1, M Ishida2, T Fujimori2

  • 1Research Center for Complex Systems Biology, Graduate School of Arts and Sciences, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan. cssawai@mail.ecc.u-tokyo.ac.jp.

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|October 14, 2016
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Summary
This summary is machine-generated.

This study introduces a novel 360° microfluidic device for precise control over chemoattractant gradients, enabling new insights into cell migration and re-orientation dynamics.

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Area of Science:

  • Cell Biology
  • Biophysics
  • Microfluidics

Background:

  • Chemotactic cell migration assays are crucial for understanding cell movement in response to chemical signals.
  • Microfluidic devices offer precise control over chemoattractant gradients, aiding in the study of chemotaxis mechanisms.
  • Conventional microfluidic devices are limited in studying cell re-orientation to dynamic or changing gradients.

Purpose of the Study:

  • To develop a versatile microfluidic device capable of generating radially symmetric chemoattractant gradients.
  • To enable precise control over gradient orientation, speed, and movement for studying cell migration.
  • To investigate cell re-orientation and steering in response to dynamic chemoattractant landscapes.

Main Methods:

  • Design and fabrication of a radially symmetric microfluidic device with 360° laminar flow.
  • Introduction of chemoattractants via central inlet or photo-uncaging.
  • Regulation of flow from multiple side channels to control gradient direction and speed.
  • Testing the device's efficacy using Dictyostelium and neutrophil-like HL60 cell migration.

Main Results:

  • The device successfully generated chemoattractant gradients with controllable orientation and movement.
  • Cell migration and re-orientation of Dictyostelium and HL60 cells were effectively steered by the dynamic gradients.
  • Demonstrated high freedom in positioning and orienting chemoattractant gradients.

Conclusions:

  • The developed radially symmetric microfluidic device offers a versatile platform for advanced chemotaxis studies.
  • This technology facilitates research into cell migration, re-orientation, and steering mechanisms.
  • Enables precise investigation of cell responses to complex and dynamic chemical environments.