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Related Experiment Video

Updated: May 20, 2026

Reconstituting Cytoarchitecture and Function of Human Epithelial Tissues on an Open-Top Organ-Chip
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Reconstituting Cytoarchitecture and Function of Human Epithelial Tissues on an Open-Top Organ-Chip

Published on: February 17, 2023

Collagen microsphere production on a chip.

Sungmin Hong1, Hui-Ju Hsu, Roland Kaunas

  • 1Department of Electrical and Computer Engineering, Texas A&M University, College Station, Texas 77843, USA.

Lab on a Chip
|July 25, 2012
PubMed
Summary
This summary is machine-generated.

Researchers created a microfluidic chip for rapid, uniform production of cell-encapsulating collagen microspheres. This chip-based method improves cell viability and recovery for tissue engineering and cell delivery applications.

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Related Experiment Videos

Last Updated: May 20, 2026

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09:46

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Published on: February 17, 2023

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Layer-by-layer Collagen Deposition in Microfluidic Devices for Microtissue Stabilization

Published on: September 29, 2015

Area of Science:

  • Biomaterials Engineering
  • Microfluidics
  • Tissue Engineering

Background:

  • Cell encapsulation in biomaterials is crucial for tissue engineering and regenerative medicine.
  • Conventional methods for producing cell-laden microspheres often suffer from poor uniformity, low cell viability, and inefficient recovery.
  • Developing advanced microfabrication techniques is essential for creating controlled cell microenvironments.

Purpose of the Study:

  • To develop and demonstrate an integrated microfluidic chip for the rapid and uniform production of collagen microspheres encapsulating cells.
  • To investigate the effect of immediate collagen gelation on microsphere uniformity and reduce microdroplet coalescence.
  • To compare the efficiency and cell viability of microfluidic extraction versus conventional centrifugation for microsphere recovery.

Main Methods:

  • Development of a microfluidic chip integrating droplet generation, in-flow gelation, and extraction.
  • Generation of monodisperse collagen microdroplets using a T-junction microfluidic device.
  • In-situ heating to 37°C within a gelation channel to initiate collagen fiber assembly.
  • Microfluidic extraction of gelled microspheres from mineral oil into cell culture media.

Main Results:

  • Achieved rapid, highly uniform production of collagen microspheres encapsulating viable cells.
  • Immediate gelation post-droplet generation significantly reduced microdroplet coalescence, enhancing microsphere uniformity.
  • Microfluidic extraction yielded higher microsphere recovery rates and superior cell viability compared to centrifugation.
  • Demonstrated successful integration of three material processing steps on a single chip.

Conclusions:

  • Chip-based microfluidic material processing offers a promising platform for generating cell-laden extracellular matrix (ECM) microenvironments.
  • This technology facilitates the efficient and controlled production of uniform collagen microspheres with high cell viability.
  • The developed microfluidic system has significant potential for applications in tissue engineering, stem cell delivery, and other cell-based therapies.