Optimization of the methods for introduction of amine groups onto the silica nanoparticle surface.
The luminescent silica nanoparticle has attracted the researchers' concentration in bioanalysis recently. Its extensive application is based on the immobilization of various biomolecules such as deoxyribonucleic acid, antibody, and so forth onto the surface. By comparing different introduction methods of amine groups, it was confirmed that the "two-step" route is more preferable by adding tetraethyl orthosilicate and 3-aminopropyl-(triethoxyl)silane in sequence, to attain ideal amine-modified silica nanoparticles. On this basis, carboxyl groups were derived from amine groups on the nanoparticle surface and then were activated by 1-ethyl-3-3-(3-dimethylaminopropyl) carbodiimide hydrochloride and N-hydroxy-succinimide. Finally, mouse monoclonal antihuman CD71 antibody (McAb CD71) and transferrin were effectively linked with the carboxyl groups and successfully labeled the receptors in the membrane of fibroblast cells, respectively.
Liu
Song
S
Key Laboratory of Biomedical Photonics of Ministry of Education-Hubei Bioinformatics, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, HuBei 430074, People's Republic of China.
Zhang
Hai-Li
HL
Liu
Tian-Cai
TC
Liu
Bo
B
Cao
Yuan-Cheng
YC
Huang
Zhen-Li
ZL
Zhao
Yuan-Di
YD
Luo
Qing-Ming
QM
D000588:Amines / Q000737:chemistry*; D000818:Animals; D000911:Antibodies, Monoclonal; D015703:Antigens, CD / Q000276:immunology; D005347:Fibroblasts / Q000737:chemistry / Q000166:cytology; D006801:Humans; D008722:Methods; D051379:Mice; D015336:Molecular Probe Techniques; D053758:Nanoparticles / Q000737:chemistry*; D011990:Receptors, Transferrin / Q000276:immunology; D012822:Silicon Dioxide / Q000737:chemistry*; D013499:Surface Properties; D014168:Transferrin
D000588:Amines; D000911:Antibodies, Monoclonal; D015703:Antigens, CD; C068126:CD71 antigen; D011990:Receptors, Transferrin; D014168:Transferrin; D012822:Silicon Dioxide