Abstract
We studied the relationship between cathepsin B (CB)-like enzyme activities and cysteine proteinase inhibitor (CPI) activities in lesions of human pigmented naevi (PN), primary melanomas (PM) and metastases/metastatic melanomas (MM). The CB-like enzyme activities in PM and MM were 2.5 and 6.8 times higher than in PN, respectively. The CB-like/CPI ratios in PM and MM were 1.9 and 11.6 times higher than in PN, respectively. CPI had the highest activity in PM and the lowest activity in MM. The disease-free interval of patients with a high CB-like enzyme activity (≧80 U/mg protein) and/or a high CB-like/CPI ratio (≧7) was shorter than that of patients with a low CB-like enzyme activity (<80 U/mg protein) and/or a low CB-like/CPI ratio (<7). Analysis of CB-like enzyme activity and/or the CB-like/CPI ratio may be useful in predicting the prognosis of human malignant melanoma.
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Yoshii, A., Kageshita, T., Tsushima, H. et al. Clinical relevance of cathepsin B-like enzyme activity and cysteine proteinase inhibitor in melanocytic tumours. Arch Dermatol Res 287, 209–213 (1995). https://doi.org/10.1007/BF01262334
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DOI: https://doi.org/10.1007/BF01262334