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Updated: Sep 30, 2025
Tissue Engineering: Construction of a Multicellular 3D Scaffold for the Delivery of Layered Cell Sheets
Published on: October 3, 2014
Hybrid spheroid microscaffolds as modular tissue units to build macro-tissue assemblies for tissue engineering
Olivier Guillaume1, Oliver Kopinski-Grünwald1, Gregor Weisgrab1
13D Printing and Biofabrication Group, Institute of Materials Science and Technology, TU Wien (Technische Universität Wien), Getreidemarkt 9/308, Vienna 1060, Austria; Austrian Cluster for Tissue Regeneration (http://www.tissue-regeneration.at), Austria.
This study introduces a novel third strategy for tissue engineering and regenerative medicine (TERM) using microscaffolds to create cellular building blocks. These microscaffold-based units maintain stem cell potential and offer enhanced control for self-assembling larger tissue constructs.
Area of Science:
- Tissue Engineering and Regenerative Medicine (TERM)
- Biomaterials and Scaffold Design
- Stem Cell Biology
Background:
- Traditional tissue engineering and regenerative medicine (TERM) strategies rely on scaffold-based or scaffold-free methods.
- A novel third TERM strategy proposes using microscaffolds to create single spheroids, which act as modular building blocks for self-assembly.
- The feasibility and impact of this third TERM strategy require detailed assessment.
Purpose of the Study:
- To systematically investigate the feasibility of the third TERM strategy using microscaffold-based spheroids.
- To compare the in vitro behavior of adipose-derived stem cell spheroids cultured within microscaffolds versus conventional spheroids.
- To evaluate the impact of microscaffolds on spheroid viability, fusion, differentiation potential, and self-assembly characteristics.
Main Methods:
- Fabrication of highly porous microscaffolds using two-photon polymerization.
- Culture of adipose-derived stem cell spheroids within individual microscaffolds.
- In vitro assessment of spheroid viability, fusiogenic potential, chondrogenesis, and osteogenesis.
- Evaluation of self-assembly of larger tissue constructs using microscaffold-based units.
Main Results:
- Microscaffolds did not impair spheroid formation or cell viability.
- Spheroids cultured within microscaffolds retained their fusiogenic and differentiation potentials (chondrogenesis and osteogenesis).
- Microscaffold-based tissue units demonstrated enhanced cell retention, decreased compaction, and better size control during self-assembly.
Conclusions:
- Microscaffold-based spheroid units represent a viable and promising approach for the third TERM strategy.
- These hybrid units serve as effective modular building blocks for directed tissue self-assembly.
- The findings provide initial scientific evidence for the potential of these units in advancing TERM.
