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Related Experiment Video

Updated: Nov 2, 2025

Human Cartilage Tissue Fabrication Using Three-dimensional Inkjet Printing Technology
09:32

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3D Printed Cartilage-Like Tissue Constructs with Spatially Controlled Mechanical Properties.

Bruna A G de Melo1, Yasamin A Jodat1, Shreya Mehrotra1

  • 1Division of Engineering in Medicine, Department of Medicine, Harvard Medical School, Brigham and Women's Hospital, Cambridge, MA 02139, USA.

Advanced Functional Materials
|June 10, 2021
PubMed
Summary

Researchers developed a novel 3D bioprinting method for cartilage tissue engineering. This technique creates mechanically robust yet soft microenvironments, improving cell viability and chondrogenic behavior for better tissue regeneration.

Keywords:
IPNbioprintingcartilagefibrinspheroids

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Regenerative Medicine

Background:

  • Developing functional cartilaginous tissues for locomotion and regeneration presents a significant challenge in tissue engineering.
  • Locomotive forces require strong mechanical properties, while chondrogenesis necessitates a soft microenvironment, creating a conflict in material design.

Purpose of the Study:

  • To engineer 3D cartilage-like tissues by uncoupling micro- and macromechanical properties.
  • To create a biomimetic tissue construct that supports both mechanical function and chondrogenic behavior.

Main Methods:

  • A dual-biomaterial 3D bioprinting strategy was employed using a hard interpenetrating polymer network (IPN) of polyethylene glycol (PEG) and alginate hydrogel.
  • A soft fibrin hydrogel incorporating human mesenchymal stem cell (hMSC) spheroids was bioprinted within the hard matrix to mimic the pericellular matrix and enhance nutrient diffusion.

Main Results:

  • The hard IPN hydrogel provided robust macromechanical properties (MPa range), while the soft fibrin hydrogel offered a conducive microenvironment (kPa range).
  • Bioprinted hMSC spheroids demonstrated improved viability and chondrogenic-like behavior without compromising the overall mechanical integrity of the engineered tissue.
  • This approach successfully decoupled the micro- and macromechanical properties, enabling localized control over the tissue's environment.

Conclusions:

  • The developed bioprinting technique allows for the creation of sophisticated 3D cartilaginous tissues with distinct mechanical properties at different scales.
  • This method offers a promising strategy for engineering functional cartilage with enhanced regenerative potential by optimizing both mechanical support and cellular microenvironment.