| 摘要 |
The present invention related to heterobifunctional cross-linkers substituted by a cell surface binding group or a cell recognising group, and also by a bio-active group, the bio-active group attached to a carbonyl of the cross-linker by an acid labile bond. Examples of suitable bio-active groups include an immunomodulator and an anti-neoplastic group. The conjugate enables, for example, the coupling of immunomodulators ex vivo to a target cell, for example a tumor antigen presenting cell. The conjugate can act as a non-toxic prodrug carrying a cytotoxin, for example, to a target tissue site, where the pH-dependency of the labile amide bond provides for cell selectivity of the masked cytotoxin. The invention further relates to a method for producing the cross-linkers, their use in treating disease, and ex-vivo cell labeling. |
