Pursuing “Zero” Protein Adsorption of Poly(carboxybetaine) from Undiluted Blood Serum and Plasma

• Published in: Langmuir 2009-10, Vol.25 (19), p.11911-11916
• Main Authors: Yang, Wei, Xue, Hong, Li, Wei, Zhang, Jinli, Jiang, Shaoyi
• Format: Article
• Language: English
• Subjects: Acrylamides - chemistry; Adsorption; Animals; Antigens - blood; Blood Proteins - chemistry; Chemistry; Colloidal state and disperse state; Exact sciences and technology; General and physical chemistry; Humans; Male; Materials: Nano-and Mesostructured Materials, Polymers, Gels, Liquid Crystals, Composites; Middle Aged; Polymers - chemistry; Solutions; Surface physical chemistry; Temperature
• ISSN: 0743-7463; 1520-5827
• DOI: 10.1021/la9015788

Human blood serum and plasma pose significant challenges to blood-contacting devices and implanted materials because of their high nonspecific adsorption onto surfaces. In this work, we investigated nonspecific protein adsorption from single protein solutions and complex media such as undiluted human blood serum and plasma onto poly(carboxybetaine acrylamide) (polyCBAA)-grafted surfaces at different temperatures. The polyCBAA grafting was done via atom-transfer radical polymerization (ATRP) with varying film thicknesses. The objective is to create a surface that experiences “zero” protein adsorption from complex undiluted human blood serum and plasma. Results show that protein adsorption from undiluted human blood serum, plasma, and aged serum on the polyCBAA-grafted surface is undetectable at both 25 and 37 °C by a surface plasmon resonance (SPR) sensor. This was achieved with a film thickness of ∼21 nm. Furthermore, it is demonstrated that the polyCBAA surfaces after antibody immobilization maintain undetectable protein adsorption from undiluted human blood serum. This is the first time that an effective nonfouling material suitable for applications in complex blood media has been demonstrated.