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Bioadhesive hydrogel microenvironments to modulate epithelial morphogenesis.

I-Ming Chung¹, Nduka O Enemchukwu, Sirajud D Khaja

¹Biological Systems Engineering Laboratory, Department of Chemical Engineering, Imperial College London, South Kensington campus, London SW7 2AZ, United Kingdom.

|April 2, 2008

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Engineered hydrogels guide epithelial cells to form polarized cysts. Bioadhesive ligands in these synthetic materials promote lumen formation and tissue development, aiding regenerative medicine.

Area of Science:

Biomaterials Science
Cell Biology
Tissue Engineering

Background:

Epithelial cells form polarized organotypic cell aggregates through cell-cell and cell-matrix interactions.
Madin-Darby Canine Kidney (MDCK) cells cultured in 3D collagen form polarized spherical cysts.
Understanding extracellular factor effects on epithelial morphogenesis is crucial for regenerative medicine.

Purpose of the Study:

To engineer protease-responsive polyethylene glycol (PEG) hydrogels for 3D culturing of MDCK cells.
To investigate the impact of bioadhesive ligands on epithelial cyst expansion, morphogenesis, and polarization.
To establish a controlled 3D microenvironment for studying epithelial development.

Main Methods:

Engineered fast-degrading, protease-responsive PEG hydrogels functionalized with RGD peptide and laminin-1.

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Published on: January 11, 2016

3D culturing of MDCK cells within functionalized PEG hydrogels for 15 days.

Multiphoton fluorescence microscopy to analyze apical and basolateral membrane domain markers.

Main Results:

MDCK cell cysts formed in bioadhesive ligand-functionalized PEG gels showed increased central lumen and apical pole formation.
Enhanced basolateral polarization was observed in cysts cultured within functionalized hydrogels.
Unmodified PEG hydrogels supported cyst formation but with less defined polarity and lumen development.

Conclusions:

Specific bioadhesive motifs incorporated into synthetic hydrogels support epithelial morphogenesis and polarization.
These engineered microenvironments offer a flexible system for investigating normal and pathological morphogenic behaviors.
The developed hydrogels hold potential for promoting tissue morphogenesis in regenerative medicine applications.