Summary
Phenolic and catecholic compounds were synthesized, by combination with cysteine or cysteamine through thioether bond, and their antimelanoma and melanocytotoxic effects were evaluated. Among nine compounds tested, 4-S-cysteaminylphenol (CAP) resulted in an increase in the life span (% ILS) of melanoma-bearing mice and in the growth inhibition (% GI) of melanoma tissue. 4-S-Cysteinylphenol (CP) and its methyl ester form also showed some increase in % GI. The 2-S-isomers of CP and CAP and diphenolic derivatives of CP did not show any significant antimelanoma effect. In addition, the s.c. injection of 4-S-CAP and 4-S-CP, in particular 4-S-CAP, caused the depigmentation of black hair which was manifested by loss of functioning melanocytes, as seen under light microscopy. The 4-S-CAP appears to provide a basis for development of a new class of antimelanoma and melanocytotoxic agents that are more stable than catecholic compounds, which have been most widely utilized as a source of rational chemotherapy for malignant melanoma.
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Miura, S., Ueda, T., Jimbow, K. et al. Synthesis of cysteinylphenol, cysteaminylphenol, and related compounds, and in vivo evaluation of antimelanoma effect. Arch Dermatol Res 279, 219–225 (1987). https://doi.org/10.1007/BF00417318
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DOI: https://doi.org/10.1007/BF00417318