Competitive protein adsorption to polymer surfaces from human serum

Area of Science:

• Biomaterials Science
• Surface Chemistry
• Polymer Science

Background:

• Protein adsorption on polymer surfaces is a critical factor in biomaterial performance.
• Developing non-fouling surfaces is essential for preventing unwanted biological interactions.

Purpose of the Study:

• To validate surface modification techniques for creating hydrophilic and non-fouling polymer surfaces.
• To investigate and compare protein adsorption behavior on modified and unmodified polymer surfaces.

Main Methods:

• Surface modification using "soft" plasma polymerization.
• Radioactive labeling of proteins (albumin and Immunoglobulin G) for adsorption monitoring.
• Simultaneous monitoring of competitive adsorption from single protein and human serum solutions.

Main Results:

• Albumin and Immunoglobulin G (IgG) adsorption levels are dependent on adsorption time and protein concentration in solution.
• Modified, hydrophilic polymer surfaces generally exhibited lower albumin and IgG adsorption compared to unmodified surfaces.
• Competitive adsorption dynamics were investigated using different radioisotopes for simultaneous monitoring.

Conclusions:

• Soft plasma polymerization effectively yields hydrophilic and non-fouling polymer surfaces.
• Surface hydrophilicity influences protein adsorption, with modified surfaces showing reduced fouling.
• The study provides novel insights into simultaneous competitive protein adsorption dynamics.