Rapid hepatic cell attachment onto biodegradable polymer surfaces without toxicity using an avidin-biotin binding...

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Cell Biology

Background:

• Efficient cell attachment to biodegradable polymer scaffolds is crucial for tissue engineering.
• Highly porous, complex 3D scaffold surfaces pose challenges for uniform cell coverage.

Purpose of the Study:

• To evaluate the efficiency of avidin-biotin binding systems (ABBS) for initial Hep G2 cell attachment to 2D and 3D poly L-lactic acid (PLLA) surfaces.
• To assess potential toxicity and effects on hepatic cell function and signaling pathways.

Main Methods:

• Biotinylation of Hep G2 cells and adsorption of avidin onto PLLA surfaces (2D and 3D).
• Assessment of cell attachment speed, proliferation, albumin secretion, gene induction (CYP1A1/2), metabolic activity (ethoxyresorufin O-deethylase assay), and signaling response to oncostatin M (OSM).

Main Results:

• ABBS facilitated rapid Hep G2 cell attachment to flat PLLA surfaces within 10 minutes.
• Attached cell proliferation and hepatic functions (albumin secretion, gene induction, metabolic capacity) remained comparable to controls.
• Cell signaling via extracellular signal-related kinase 1 (ERK1) in response to OSM was preserved.
• Efficient Hep G2 cell attachment was also demonstrated on highly porous 3D PLLA scaffolds.

Conclusions:

• ABBS is an effective method for rapid cell trapping on both 2D and 3D biodegradable polymer scaffolds.
• The ABBS technique minimally impacts liver-specific cell functions and transmembrane receptor signaling.