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Wang P, Magdolen V, Seidl C, Dorn J, Drecoll E, Kotzsch M, Yang F, Schmitt M, Schilling O, Rockstroh A, Clements JA, Loessner D. Kallikrein-related peptidases 4, 5, 6 and 7 regulate tumour-associated factors in serous ovarian cancer. Br J Cancer 2018; 119:1-9. [PMID: 30287916 PMCID: PMC6189062 DOI: 10.1038/s41416-018-0260-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 08/08/2018] [Accepted: 08/16/2018] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Tissue kallikrein-related peptidases 4, 5, 6 and 7 (KLK4-7) strongly increase the malignancy of ovarian cancer cells. Deciphering their downstream effectors, we aimed at finding new potential prognostic biomarkers and treatment targets for ovarian cancer patients. KLK4-7-transfected (OV-KLK4-7) and vector-control OV-MZ-6 (OV-VC) ovarian cancer cells were established to select differentially regulated factors. METHODS With three independent approaches, PCR arrays, genome-wide microarray and proteome analyses, we identified 10 candidates (MSN, KRT19, COL5A2, COL1A2, BMP5, F10, KRT7, JUNB, BMP4, MMP1). To determine differential protein expression, we performed western blot analyses, immunofluorescence and immunohistochemistry for four candidates (MSN, KRT19, KRT7, JUNB) in cells, tumour xenograft and patient-derived tissues. RESULTS We demonstrated that KLK4-7 clearly regulates expression of MSN, KRT19, KRT7 and JUNB at the mRNA and protein levels in ovarian cancer cells and tissues. Protein expression of the top-upregulated effectors, MSN and KRT19, was investigated by immunohistochemistry in patients afflicted with serous ovarian cancer and related to KLK4-7 immunoexpression. Significant positive associations were found for KRT19/KLK4, KRT19/KLK5 and MSN/KLK7. CONCLUSION These findings imply that KLK4-7 exert key modulatory effects on other cancer-related genes and proteins in ovarian cancer. These downstream effectors of KLK4-7, MSN and KRT19 may represent important therapeutic targets in serous ovarian cancer.
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Affiliation(s)
- Ping Wang
- Department of Obstetrics and Gynecology, Technical University of Munich, Munich, Germany
| | - Viktor Magdolen
- Department of Obstetrics and Gynecology, Technical University of Munich, Munich, Germany
| | - Christof Seidl
- Department of Obstetrics and Gynecology, Technical University of Munich, Munich, Germany
| | - Julia Dorn
- Department of Obstetrics and Gynecology, Technical University of Munich, Munich, Germany
| | - Enken Drecoll
- Department of Pathology, Technical University of Munich, Munich, Germany
| | | | - Feng Yang
- Department of Obstetrics and Gynecology, Technical University of Munich, Munich, Germany
| | - Manfred Schmitt
- Department of Obstetrics and Gynecology, Technical University of Munich, Munich, Germany
| | - Oliver Schilling
- Institute of Molecular Medicine and Cell Research, University of Freiburg, Freiburg, Germany.,BIOSS Centre of Biological Signaling Studies, University of Freiburg, Freiburg, Germany
| | - Anja Rockstroh
- Australian Prostate Cancer Research Centre-Queensland, Translational Research Institute, Brisbane, QLD, Australia.,Institute of Health and Biomedical Innovation, Queensland University of Technology (QUT), Brisbane, QLD, Australia
| | - Judith Ann Clements
- Australian Prostate Cancer Research Centre-Queensland, Translational Research Institute, Brisbane, QLD, Australia.,Institute of Health and Biomedical Innovation, Queensland University of Technology (QUT), Brisbane, QLD, Australia
| | - Daniela Loessner
- Institute of Health and Biomedical Innovation, Queensland University of Technology (QUT), Brisbane, QLD, Australia. .,Barts Cancer Institute, Queen Mary University of London, London, UK.
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