[Study of the adsorption behaviors of plasma proteins on the single-walled carbon nanotubes nonwoven].
Single walled carbon nanotubes (SWNT) have attracted increasing research interests for the purpose of biomedical application because they provide not only nanostructured topography, but also chemical composition of pure carbon atoms, as well as ultra high strength and excellent flexibility. Regarding the interactions of nanomaterials to biological systems, non-specific adsorption of plasma proteins is one of the most important issues to be concerned, which plays a crucial role that would determine how biological systems response to the biomaterials. Motivated by application of SWNT materials in biomedical fields, in this study, the adsorption behaviors of plasma proteins on the surface of SWNT nonwoven, prepared directly by floating chemical vapor observation and energy deposition method were investigated by means of scanning electron microscope (SEM), dispersive X-ray (EDX) analysis and ELISA. Results indicated the SWNT non-woven showed a clear adsorption preference of fibrinogen over albumin. There was no human serum albumin detected using above analysis methods on the SWNT nonwoven even incubated in the albumin solution of 4 mg/ml. While more than 0.15 microg of human fibrinogen was detected by ELISA on the SWNT nonwoven with area of 40 mm x 40 mm incubated in the fibrinogen solution of 5 microg/ml. In addition, IgG of sheep-anti-human serum fibrinogen exhibited strong nonspecific adsorption on the surface of SWNT nonwoven. The adsorption behaviors are different significantly from those of other carbon materials and conventional biomaterials. The unique interaction of SWNT nonwoven to plasma proteins is of significance to further studies of blood cells responses.
Meng
Jie
J
Department of Biomedical Engineering, Institute of Basic Medicine, Chinese Academy of Medical Sciences Peking Union Medical College, Beijing 100005, China.
Song
Li
L
Meng
Jie
J
Kong
Hua
H
Wang
Chaoying
C
Guo
Xiaotian
X
Xu
Haiyan
H
Xie
Sishen
S
D000327:Adsorption; D001672:Biocompatible Materials / Q000737:chemistry*; D001798:Blood Proteins / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D013499:Surface Properties
D001672:Biocompatible Materials; D001798:Blood Proteins; D037742:Nanotubes, Carbon