I Bartenjev1, Z Rudolf, B Stabuc, I Vrhovec, T Perkovic, A Kansky. 1. Department of Dermatovenereology, University Medical Centre, Institute of Oncology, and Institute of Pathology, Ljubljana, Slovenia. Igor.Bartenjev@siol.net
Abstract
BACKGROUND: The aspartic proteinase cathepsin D is believed to be associated with proteolytic processes leading to the invasion and seeding of tumor cells. An association between cathepsin D tissue concentration and aggressiveness of tumors has been detected in different cancer types, as well as in metastatic melanoma. METHODS: The concentration of cathepsin D was measured immunoradiometrically (ELSA-CATH-D kit, CIS Bio International) in the cytosols of 51 primary cutaneous melanomas (with Breslow index < 4 mm) to estimate the tissue concentrations of cathepsin D in early cutaneous melanoma. RESULTS: A significantly elevated concentration of cathepsin D was measured in the tumor cytosols as compared to adjacent normal tissue (44.2 vs. 14.7 pmol/mg of total protein, P < 0.001). CONCLUSIONS: Our results indicate that cathepsin D is expressed at high levels by melanoma cells. The extremely high expression of cathepsin D in two of our patients, with later progression of the disease over a 42-month follow-up period, suggests a possible correlation between the cathepsin D tissue concentration and the prognosis of primary cutaneous malignant melanoma.
BACKGROUND: The aspartic proteinase cathepsin D is believed to be associated with proteolytic processes leading to the invasion and seeding of tumor cells. An association between cathepsin D tissue concentration and aggressiveness of tumors has been detected in different cancer types, as well as in metastatic melanoma. METHODS: The concentration of cathepsin D was measured immunoradiometrically (ELSA-CATH-D kit, CIS Bio International) in the cytosols of 51 primary cutaneous melanomas (with Breslow index < 4 mm) to estimate the tissue concentrations of cathepsin D in early cutaneous melanoma. RESULTS: A significantly elevated concentration of cathepsin D was measured in the tumor cytosols as compared to adjacent normal tissue (44.2 vs. 14.7 pmol/mg of total protein, P < 0.001). CONCLUSIONS: Our results indicate that cathepsin D is expressed at high levels by melanoma cells. The extremely high expression of cathepsin D in two of our patients, with later progression of the disease over a 42-month follow-up period, suggests a possible correlation between the cathepsin D tissue concentration and the prognosis of primary cutaneous malignant melanoma.
Authors: Shreeja Mehrotra; Susrutha K Wickremesekera; Helen D Brasch; Bede Van Schaijik; Reginald W Marsh; Swee T Tan; Tinte Itinteang Journal: Front Surg Date: 2018-06-07
Authors: Chandra Kirana; Hongjun Shi; Emma Laing; Kylie Hood; Rose Miller; Peter Bethwaite; John Keating; T William Jordan; Mark Hayes; Richard Stubbs Journal: Int J Proteomics Date: 2012-08-07