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Hepatic Spheroid Formation on Carbohydrate-Functionalized Supramolecular Hydrogels.

Jie Liu1, Ying Zhang2, Kim van Dongen3

  • 1Institute for Complex Molecular Systems, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven 5600 MB, The Netherlands.

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Summary
This summary is machine-generated.

Synthetic hydrogels mimic the extracellular matrix for liver tissue engineering. These novel biomaterials promote hepatic cell growth and spheroid formation, showing potential for regenerative medicine applications.

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Supramolecular Chemistry

Background:

  • The extracellular matrix (ECM) is crucial for cell function and tissue development.
  • Mimicking ECM properties with synthetic materials is key for regenerative medicine.
  • Hepatic cell culture requires specialized matrices to maintain function and promote tissue formation.

Purpose of the Study:

  • To develop and characterize synthetic supramolecular hydrogels for liver tissue engineering.
  • To investigate the bioactivity and cell-matrix interactions of carbohydrate-functionalized hydrogels.
  • To assess the potential of these hydrogels in promoting hepatic cell spheroid formation and migration.

Main Methods:

  • Synthesis of bis-urea amphiphiles with lactobionic acid (LBA) and maltobionic acid (MBA) ligands.
  • Characterization of hydrogel self-assembly, fibrillary structure, and mechanical properties (stiffness, self-healing).
  • In vitro evaluation of hydrogel bioactivity using hepatic HepG2 cell cultures, including spheroid formation and cell migration assays.

Main Results:

  • Carbohydrate amphiphiles self-assembled into supramolecular fibers, forming physically entangled hydrogels.
  • Hydrogels exhibited good self-healing properties but varied significantly in stiffness.
  • Both LBA- and MBA-functionalized hydrogels demonstrated excellent bioactivity, inducing hepatic cell spheroid formation via ASGPR binding.
  • Ligand characteristics and hydrogel stiffness influenced cell migration, spheroid size, and number.

Conclusions:

  • Self-assembled, carbohydrate-functionalized hydrogels show promise as advanced cell culture matrices.
  • These hydrogels effectively mimic ECM features and support hepatic cell functions, including spheroid formation.
  • The study highlights the potential of these dynamic biomaterials for liver tissue engineering applications.