The present application belongs to the technical field of biological
medicine, and discloses a
salinomycin derivative, and a preparation method therefor and a use thereof. The
salinomycin derivative comprises a general formula structure of formula (1), and compared with
salinomycin, the activity of the salinomycin derivative is significantly improved. A group at the C-20 position contains a
disulfide bond. By means of a replacement reaction of the
disulfide bond, quick and efficient
coupling with a polypeptide or an
antibody can occur to obtain a GSH-sensitive salinomycin derivative containing the polypeptide or the
antibody, or a salt thereof. The salinomycin derivative containing the polypeptide or the
antibody, or the salt thereof has
improved solubility, and also has enhanced targeting performance, has improved
drug selectivity and
biological activity, has a bystander effect, and in addition to being able to kill
tumor cells highly expressing antigens, has a significant
inhibitory effect on cells lowly expressing antigens. In addition, the salinomycin derivative or the salt thereof has the effects of reversing
drug resistance in
tumor cells and enhancing
drug sensitization and can be used in combination with other drugs to further improve the
efficacy.