5 years ago

Ice-Templated and Cross-Linked Amyloid Fibril Aerogel Scaffolds for Cell Growth

Ice-Templated and Cross-Linked Amyloid Fibril Aerogel Scaffolds for Cell Growth
Wye-Khay Fong, Gustav Nyström, Raffaele Mezzenga
Amyloid fibrils prepared from β-lactoglobulin were used to form freeze-dried and cross-linked aerogels. By varying the fibril concentration and freezing gradient, it was possible to control the pore structure and elastic modulus of the aerogels within one order of magnitude from ∼20 to ∼200 kPa. Using butane tetracarboxylic acid as cross-linker, these aerogels maintained their monolithic shape under aqueous conditions, displaying elastic behavior and a modulus in the range of ∼4–40 kPa. When explored as scaffolds for cell growth, the amyloid fibril aerogels demonstrated biocompatibility and led to the successful penetration and permeation of two epithelial cell lines (Caco-2 and HT29) throughout the scaffold. These soft, elastic, and water-stable biomaterials expand the scope of amyloid fibril aerogels, making them suitable for wet-state applications such as heterogeneous catalysis, purification membranes, and 3D matrices for cell growth.

Publisher URL: http://dx.doi.org/10.1021/acs.biomac.7b00792

DOI: 10.1021/acs.biomac.7b00792

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