Application of Goldmag immune probe in timely detection of syphilis based on GIS platform.

The purpose of this study was to apply goldmag immunoprobes into establishment of nanoparticles-based colorimetric assay as well as construction of immunochromatography quantitative and qualitative system by exploring point-of-care testing of syphilis with goldmag particles carrier-based immunoprobe and analysis of spatial data of Geographic Information System (GIS) platform. Goat anti-rabbit immunoglobulin G (IgG) was coupled on the surface of modified nanoparticles, taking N-(3-dimethylaminopropyl)-N'-ethyl-carbodiimide as the connector. Then the nanoparticles were used for colorimetric detection of goat-anti-rabbit IgG in liquid phase system. Based on the analysis of spatial data in GIS platform, we found the probe constructed based on MUA-Fe304/Au nanoparticles responded more sensitive to detection objects compared with the probe designed based on PAA-Fe3O4/Au nanoparticles, and its reaction rate constant was two times that of PAA-Fe3O4/Au nanoparticles based goldmag immunoprobe. Goldmag particles not only can be coupled with biomolecules such as antibody/antigen and glycoprotein but also possess superparamagnetism.