Antitumor Activity of an Enzyme Prodrug Therapy Targeted to the Breast Tumor Vasculature

Author: Van Rite Brent D.   Krais John J.   Cherry Mohamad   Sikavitsas Vassilios I.   Kurkjian Carla   Harrison Roger G.  

Publisher: Informa Healthcare

ISSN: 0735-7907

Source: Cancer Investigation, Vol.31, Iss.8, 2013-10, pp. : 505-510

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Abstract

The L-methioninase-annexin V/selenomethionine enzyme prodrug system, designed to target the tumor vasculature and release the methylselenol anticancer drug in the tumor, was tested in mice with implanted MBA-MB-231 breast tumors. This therapy was able to cause a reduction in the size of the tumors during the treatment period. It was shown that L-methioninase-annexin V was uniformly bound at the blood vessel surface in the tumor and also that there was a substantial cutoff of blood flowing through the treated tumor, consistent with the therapy's design. This new approach for enzyme prodrug therapy of breast cancer appears promising.

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