Cathepsin-D and c-erb-B 2 have an additive prognostic value for breast cancer patients

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1993 (EN)
Cathepsin-D and c-erb-B 2 have an additive prognostic value for breast cancer patients (EN)

Scorilas, A. (EN)

Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών (EL)
Scorilas, A. (EN)

In breast cancer, axillary lymph node invasiveness is the major prognostic factor in predicting relapse and metastasis. Nevertheless, since 30% of node-negative tumours also relapse, it is necessary to develop other independent prognostic factors. Oncogene amplification and overexpression as well as the level of cathepsin-D have been proposed as additional prognostic factors. Recent studies suggest that the acidic lysosomal proteinase cath-D, present in all cells and known to be secreted in breast cancer cells, may be implicated in the process of tumour invasion and metastasis. We have compared the cytosolic cath-D level with the amplification and the overexpression of the oncogenes c-myc and c-erb-b-2 in 62 breast carcinomas (52 primary and 10 metastatic). Using a cut-off level of 60 pmol/mg protein, the status of cath-D showed a positive correlation with c-myc amplification (P = 0.01) or overexpression (P = 0.02). In contrast, no correlation was found between cath-D and c-erb-B-2 amplification or overexpression. Also, no correlation was found between cath-D and established prognostic factors such as node invasiveness, steroid receptors, grade and menopausal status. Nevertheless, a weak correlation was found between cath-D levels and tumour status (P = 0.05). In conclusion, in breast cancer, a high cytosolic cath-D concentration is more frequent in tumours with c-myc amplification and overexpression but is dissociated from c-erb-B-2 amplification or overexpression, suggesting that the determination of cath-D, as well as the latter two markers, will have an additional prognostic value. (EN)

Breast Neoplasms/*diagnosis/pathology (EN)

Πανεπιστήμιο Ιωαννίνων (EL)
University of Ioannina (EN)

Anticancer Res (EN)



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