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Erschienen in: Clinical & Experimental Metastasis 1/2010

01.01.2010 | Research Paper

Protease inhibitor SERPINA1 expression in epithelial ovarian cancer

verfasst von: Karine Normandin, Benjamin Péant, Cécile Le Page, Manon de Ladurantaye, Véronique Ouellet, Patricia N. Tonin, Diane M. Provencher, Anne-Marie Mes-Masson

Erschienen in: Clinical & Experimental Metastasis | Ausgabe 1/2010

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Abstract

Epithelial ovarian cancer is the most lethal gynecologic cancer with a 5 years survival rate of 30–40% in patients diagnosed with high-grade invasive disease (TOV). This is in stark contrast to the 95% 5 years survival rate in ovarian cancer patients diagnosed with low malignant potential (LMP) disease. The progression from localized tumor to invasive metastasis involves matrix proteolysis. Protease inhibitors are thought to play a key role by limiting this process. Using the Affymetrix HG-U133A GeneChip array, we have studied all serine protease inhibitors and found several serpin family members that are differentially expressed between LMP and TOV serous tumors. SERPINA1 was selected for further study due to its high expression in the majority of LMP tumors and its low expression in TOV tumors; observations that were also validated by quantitative-PCR (Q-PCR). To study the effects of its over expression on different tumorigenic parameters, SERPINA1 was cloned in the pcDNA3.1+ plasmid which was subsequently used to derive stable clones from two invasive ovarian cancer cell lines, TOV-112D and TOV-1946. We found no effect of SERPINA1 over expression on tumor growth in SCID mice although cell migration and invasion were affected in in vitro assays. There was also no association between patient survival and SERPINA1 immunostaining, however, SERPINA1 localization was different in LMP (nuclear) and TOV (cytoplasmic) tumors. SERPINA1 remains an interesting candidate since protein homeostasis, regulated by proteases and their inhibitors, should be studied holistically in order to assess their full impact in tumor progression.
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Metadaten
Titel
Protease inhibitor SERPINA1 expression in epithelial ovarian cancer
verfasst von
Karine Normandin
Benjamin Péant
Cécile Le Page
Manon de Ladurantaye
Véronique Ouellet
Patricia N. Tonin
Diane M. Provencher
Anne-Marie Mes-Masson
Publikationsdatum
01.01.2010
Verlag
Springer Netherlands
Erschienen in
Clinical & Experimental Metastasis / Ausgabe 1/2010
Print ISSN: 0262-0898
Elektronische ISSN: 1573-7276
DOI
https://doi.org/10.1007/s10585-009-9303-6

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