In vitro study on mesothelin antibody-tagged nanoprobe targeting human pancreatic cell line BxPC3 / 中华胰腺病杂志

ABSTRACT

Objective To observe the targeted function of a mesothelin antibody modified nanoprobe in human pancreatic cancer BxPC3 cell.Methods The Fe3O4@SiO2 nanoprobe was prepared by St(o)ber method,and then quantum dots (CdTe) and mesothelin antibody was crosslinked to obtain the properties of targeting and fluorescent.Fluorescent nano Fe3O4@SiO2 probes and BxPC3 cells were incubated in vitro for 30 min.Its targeting performance was tested by the CCD imaging system and magnetic separation technology.HepG-2 and K562 cells with low expression of mesothelin were selected as reference cells.Results This preparation method of nanoprobe could produce a uniform and narrow distribution particle with particle size mainly ranging from 120 to 140 nm.The cell adsorption experiments showed that the adsorption efficiency of BxPC3,HepG-2 and K562 by nanoprobe without crosslinking antibody were less than 20％,as a non-specific adsorption; and the adsorption efficiency of BxPC3,HepG-2 and K562 by crosslinking mesothelin antibody nanoprobe were (53.9 ± 1.8) ％,(8.0 ± 2.1) ％ and (8.9 ± 2.3) ％ respectively,and the adsorption capacity with BxPC3 was significantly increased.Conclusions The nanoprobe modified by mesothelin antibody can effectively recognize BxPC3 cells which highly expressing mesothelin.