Browsing by Subject "Cathepsin K"

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    Cathepsin K expression in melanoma is associated with metastases
    (Universidad de Murcia. Departamento de Biología Celular e Histología, 2017) Petricevic, Slavica Juric; Pavlovic, Antonia; Capkun, Vesna; Becic, Kristijan; Durdov, Merica Glavina
    Introduction. Melanoma of the skin shows a tendency to metastasize via lymph or blood secreting matrix metalloproteinases and cathepsins, which enable penetration through the dermis. Cathepsin K acts in cytoplasm of atypical melanocytes and completely cleaves internalized collagen. Materials and methods. Expression of cathepsin K was analyzed immunohistochemically in 45 melanomas and correlated to morphological and clinical parameters. Results. During six years follow up, 13 patients developed lymph node metastases and three of them distant metastases. Positive expression of cathepsin K was found in 19 cases. In univariate regression analysis histological type, pagetoid spread, mitotic activity and cathepsin K expression were significantly connected to metastases. Cathepsin K was significantly associated to histologic type, ulceration, pagetoid spread and mitotic rate. In multiple logistic regression adjusted to these variables, cathepsin K was an independent predictor in occurrence of metastases (P=0.015). Median to the occurrence of metastases was 40 months in patients with cathepsin K positive expression and 71 months in patients with cathepsin K negative expression (P<0.001). Conclusions. In this preliminary study positive expression of cathepsin K in melanoma of the skin is associated with other unfavorable prognostic factors. We consider cathepsin K expression in primary tumor would significantly precipitate occurrence of metastases.
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    Elevated cathepsin K potentiates metastasis of epithelial ovarian cancer
    (Universidad de Murcia. Departamento de Biología Celular e Histología, 2018) Fan, Xiujie; Wang, Chongjuan; Song, Xianhui; Liu, Huaqing; Li, Xue; Zhang, Yuanfang
    Cathepsin K, or CTSK, has been found to be involved in the peritoneal metastasis of ovarian carcinoma. However, the expression and clinicopathological significance of CTSK remains unknown in epithelial ovarian cancer (EOC). The aim of the present study was to investigate the expression of CTSK and its clinicopathological significance in EOC. TSK expression was evaluated using immunohistochemistry in EOC tissue microarray. The expression of CTSK in EOC was displayed to be markedly higher than that of adjacent normal control. In addition, CSTK expression was shown to be remarkably associated with metastases and inferior overall prognosis of EOC. In vitro, Knock-down of CTSD was exhibited to be able to suppress migration and invasion in EOC cell lines OV2008 but not proliferation in OV-2008. Together, our data showed that elevated CTSD in EOC can potentiate the metastasis of EOC cells, suggesting that targeting CTSD might be used as a novel therapeutic target for EOC.