Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 135, Issue 18, Pages 7047-7052Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja402126t
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Funding
- Daimler Benz foundation
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Nonspecific protein adsorption is a central challenge for the use of polymeric materials in biological media. While the quantity of adsorbed protein can be lowered, very few surfaces are protein resistant when exposed to undiluted serum or plasma. The underlying principles of this fouling and the adsorbing proteins remain to be identified. Here, we investigated adsorption from undiluted human blood plasma to three different polymer brushes. Our study showed that the polymer structure does not influence which proteins adsorb. Further, we identified 98 plasma proteins that still foul current protein-resistant polymer brushes. Detailed studies into the major adsorbing protein revealed the central role that lipoproteins and low density lipoprotein in particular play in fouling of plasma to polymeric biomaterials. However, although apolipoprotein B100 is found as a major fouling protein in our mass spectrometry screening, studies on individual components of lipoproteins show that it is not apoB100 but a mixture of phospholipids, triglycerides, and cholesteryl esters that plays a major role in lipoprotein adsorption.
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