Objective: The purpose of this study was to prepare and characterize a lipid magnetic ball modified with KRAS antibodies on the surface and to isolate circulating tumor cells of colorectal cancer with KRAS  mutations.
Methods: The microemulsion method was used to form lipid bilayers to encapsulate Fe3O4 nanoparticles with superparamagnetism to form lipid magnetic balls, and KRAS  antibodies were formed on the surface to form KRAS  immune lipid magnetic balls.
Results: Compared with traditional EpCAM antibody-modified lipid magnetic balls, it can effectively improve the capture ability of colorectal cancer circulating tumor cells with KRAS  mutation, the capture rate reaches 92.9%, and the capture results are consistent with clinical diagnosis and pathology.
Conclusion: Our results showed that KRAS  antibody-modified lipid magnetic balls can be used in the diagnosis and treatment of KRAS  colorectal cancer.
Keywords: colorectal cancer, circulating tumor cells, KRAS  mutation, lipid magnetic balls