Epidermal growth factor (EGF) was used as a vector for targeted delivery of phthalocyanines to tumor cells. The conjugates of EGF with disulfochloride aluminum phthalocyanine [Pc(Al)] and disulfochloride cobalt phthalocyanine [Pc(Co)] were synthesized. The cytotoxic activity of the conjugates against the human breast carcinoma cell line MCF-7 was determined. The cytotoxic activity of the EGF-Pc(Co) conjugate was 4.5 times higher than that of the EGF-Pc(Al) conjugate. The antitumor activity of the EGF-Pc(Co) conjugate was also studied in vivo in murine melanoma B16. Compared to free Pc(Co), intravenous injections of Pc(Co) conjugated with EGF inhibited tumor development and increased mean life span and mean survival time of experimental animals.

Keywords:
Epidermal growth factor, Disulfochloride aluminum phthalocyanine, Disulfochloride cobalt phthalocyanine, Conjugate, Targeted delivery, Phthalocyanines
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1999
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