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Updated: Apr 23, 2026

Construction of Modular Hydrogel Sheets for Micropatterned Macro-scaled 3D Cellular Architecture

Construction of Modular Hydrogel Sheets for Micropatterned Macro-scaled 3D Cellular Architecture

Published on: January 11, 2016

Shape-changing hydrogel surfaces trigger rapid release of patterned tissue modules.

Olukemi O Akintewe¹, Samuel J DuPont¹, Kranthi Kumar Elineni²

¹Department of Chemical and Biomedical Engineering, University of South Florida, Tampa, FL 33620, USA.

Acta Biomaterialia

|October 1, 2014

Summary

This summary is machine-generated.

Researchers developed shape-changing materials to create and release 3D tissue modules. This method uses mechanical forces, not just heat, to detach engineered tissues, preserving their structure for regenerative medicine applications.

Keywords:

Cell release Hydrogel Poly-N-isopropylacrylamide Stimulus responsive materials Tissue building block

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Last Updated: Apr 23, 2026

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Area of Science:

Biomaterials Science
Tissue Engineering
Regenerative Medicine

Background:

Bottom-up approaches using tissue building blocks are key for constructing complex 3D tissues.
Developing methods to form and harvest these modules while maintaining spatial organization and cell connections is crucial.

Purpose of the Study:

To investigate patterned shape-changing materials as an innovative method for forming and harvesting free-standing tissue modules.
To explore a mechanical mechanism for releasing engineered tissue constructs.

Main Methods:

Utilized arrays of micro-scale, surface-attached hydrogels made from thermoresponsive polymers as cell culture supports.
Fabricated tissue modules of defined geometric shapes and stimulated hydrogel swelling for surface expansion and tissue expulsion.
Modulated surface strain by varying hydrogel crosslink density to identify a release strain threshold.

Main Results:

Achieved formation and release of intact tissue modules with preserved spatial organization and cell-cell connections.
Identified a mechanical release mechanism dependent on inter- and intra-cellular tension.
Demonstrated that cell-matrix adhesions are disrupted by the incompatibility between surface expansion and tissue cohesion/stiffness.

Conclusions:

Shape-changing materials offer a novel method for forming and harvesting tissue building blocks.
The release mechanism is independent of the thermal stimulus, relying on mechanical cues and material properties.
This approach facilitates the creation of engineered tissues for potential therapeutic applications.