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13.
Cathepsin B, H, and L and their inhibitors stefin A and cystatin C in sera of melanoma patients
Kos, Janko, 1959- ...
The levels of cathepsin (Cats) B, H, and L and their inhibitors stefin A and cystatin C were determined in the sera of 43 patients with metastatic melanoma, in 54 patients with metastatic melanoma, ...in 54 patients with treatedcutaneous melanoma with no evidence of metastatic disease, and in 30 healthy blood donors, using quantitative ELISAs. The levels of Cats B and H and cystatin C were significantly higher within the group of metastatic melanoma patients compared with the healthy controls. The median Cat B was 4.8versus 3.6 ng/ml (P<0.013), the median Cat H was 13.7 versus 4.9 ng/ml (P<0.0001), and the median cystatin C was 470 versus 320 ng/ml (P<0.02). Cat Hwas also significantly increased within the group of melanoma patients with no metastasis, with a median of 9.6 ng/ml. Cat B was found to correlate with Cat L (r=0.36; P<0.02) and cystatin C (r=0.41; P<0.008). The serum level of Cat H was significantly increased in patients showing no response to the chemoimmunotherapy as compared to the level in responders. Metastatic melanomapatients with high contents of Cat B and Cat H experienced significantly shorter overall survival rates than the patients with low levelsof each enzyme (Cat B: P<0.003 and relative risk, 2.5; Cat H: P<0.006 and relative risk, 2.4, using medians as cutoff values). The other potential factors for prognosis for this group of patients revealed moderate (histological type and age) or no (tumor thickness, sex, and lymph node metastasis) prognostic significance. Similarly, no difference in survival was found for stefin A, cystatic C, and Cat L. These results suggest that the serum levels of Cats B and H could serve as prognostic factors for patients with advanced melanoma. (Abstract truncated at 2000 characters).
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