SHIGA TOXIN B-SUBUNIT AS A VECTOR FOR TUMOR DIAGNOSIS AND DRUG DELIVERY TO GB3-EXPRESSING TUMORS

摘要

The invention relates to new compounds for cancer therapy or diagnosis and more specifically to the use of a non-toxic B subunit of Shiga toxin mutant as a vector for diagnostic products or drugs in over-expressing Gb3 receptor cells, such compounds having the following formula: STxB-Z(n)-Cys-Y(m)- T wherein STxB is the Shiga Toxin B subunit or a functional equivalent thereof, Z is an amino-acid devoided of sulfydryl group, n being 0, 1 or a polypeptide, Cys is the amino-acid Cysteine, T is a molecule linked by a covalent bound to the S part of Cys, Y is a linker between T and Cys.