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Related Concept Videos

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Updated: Apr 30, 2026

Layer-by-layer Collagen Deposition in Microfluidic Devices for Microtissue Stabilization
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Semi-automated layer-by-layer biofabrication using rotational internal flow layer engineering technology.

Gwyneth West1, Sneha Ravi2, Jamie A Davies3

  • 1Deanery of Biomedical Science, The University of Edinburgh, Edinburgh, United Kingdom.

SLAS Technology
|February 23, 2025
PubMed
Summary
This summary is machine-generated.

Automating Rotational Internal Flow Layer Engineering (RIFLE) enhances human tissue production scale and reproducibility. Semi-automated RIFLE with collagen hydrogels shows high cell viability, advancing biofabrication for research and clinical use.

Keywords:
AlginateAutomationBiofabricationCollagenRIFLETissue engineeringTubular tissue

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Area of Science:

  • Biotechnology
  • Tissue Engineering
  • Regenerative Medicine

Background:

  • Biofabrication aims to scale and improve reproducibility of human tissue production.
  • Rotational Internal Flow Layer Engineering (RIFLE) creates microscale layered tubular constructs.
  • Current RIFLE methods require manual application of cell-laden hydrogels.

Purpose of the Study:

  • To automate key elements of the RIFLE biofabrication process, specifically liquid dispensing.
  • To evaluate the performance of the automated RIFLE system using alginate and collagen hydrogels.
  • To assess the impact of automation on cell viability and layer precision in engineered tissues.

Main Methods:

  • Development and implementation of an automated liquid dispensing system for RIFLE.
  • Utilizing alginate and collagen as cell-laden hydrogel materials.
  • Comparing cell viability and layer formation between manual and semi-automated RIFLE processes.
  • Characterizing the resolution of cell layering in engineered constructs.

Main Results:

  • Semi-automated assembly achieved cell viabilities comparable to manual methods.
  • Automated collagen hydrogel demonstrated high cell viability (>91%) over 10 days.
  • The semi-automated RIFLE system precisely assembled cell populations into cell-width layers (≈14 µm).
  • Automation reduced manual operations and potential for human error.

Conclusions:

  • Automating the RIFLE process improves efficiency and reproducibility in biofabrication.
  • Collagen hydrogels are advantageous for automated tissue engineering applications using RIFLE.
  • Further automation, particularly in cell-hydrogel suspension preparation, is recommended for broader biofabrication advancement.