Clinical relevance of kallikrein-related peptidase 6 (KLK6) and 8 (KLK8) mRNA expression in advanced serous ovarian cancer
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Nancy Ahmed
Abstract
Most members of the kallikrein-related peptidase family have been demonstrated to be dysregulated in ovarian cancer and modulate tumor growth, migration, invasion, and resistance to chemotherapy. In the present study, we assessed the mRNA expression levels of KLK6 and KLK8 by quantitative PCR in 100 patients with advanced serous ovarian cancer FIGO stage III/IV. A pronounced correlation between KLK6 and KLK8 mRNA expression (rs = 0.636, p < 0.001) was observed, indicating coordinate expression of both peptidases. No significant associations of clinical parameters with KLK6, KLK8, and a combined score KLK6+KLK8 were found. In univariate Cox regression analysis, elevated mRNA levels of KLK6 were significantly linked with shortened overall survival (OS) (hazard ratio [HR] = 2.07, p = 0.007). While KLK8 values were not associated with patients’ outcome, high KLK6+KLK8 values were significantly associated with shorter progression-free survival (HR = 1.82, p = 0.047) and showed a trend towards significance in the case of OS (HR = 1.82, p = 0.053). Strikingly, in multivariable analysis, elevated KLK6 mRNA values, apart from residual tumor mass, remained an independent predictive marker for poor OS (HR = 2.33, p = 0.005). As KLK6 mRNA and protein levels correlate, KLK6 may represent an attractive therapeutic target for potent and specific inhibitors of its enzymatic activity.
Acknowledgments
We thank Elisabeth Schüren for excellent technical assistance. Stefanie Avril is supported by the Clinical and Translational Science Collaborative of Cleveland, from the National Center for Advancing Translational Sciences (NCATS) component of the NIH (KL2TR000440). This work was supported in part by grants from the Deutsche Forschungsgemeinschaft [DFG; DO 1772/1-1 (J.D.) and AV 109/4-1 (S.A.)], the Austrian Science Fund [FWF; P25003-B21 (P.G.)], and by a mobility grant [Personalized Medicine (V.M., M.S.)] from the German Academic Exchange Service (DAAD).
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©2016 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Guest Editorial
- Highlight: remodelling the KLK landscape down under
- HIGHLIGHT: 6TH INTERNATIONAL SYMPOSIUM ON KALLIKREINS AND KALLIKREIN-RELATED PEPTIDASES
- Kallikrein(K1)-kinin-kininase (ACE) and end-organ damage in ischemia and diabetes: therapeutic implications
- Mechanistic insight from murine models of Netherton syndrome
- Development of molecules stimulating the activity of KLK3 – an update
- Exploring the active site binding specificity of kallikrein-related peptidase 5 (KLK5) guides the design of new peptide substrates and inhibitors
- Structural basis for the Zn2+ inhibition of the zymogen-like kallikrein-related peptidase 10
- Clinical relevance of kallikrein-related peptidase 6 (KLK6) and 8 (KLK8) mRNA expression in advanced serous ovarian cancer
- Kallikrein-related peptidase 6 exacerbates disease in an autoimmune model of multiple sclerosis
- A viable mouse model for Netherton syndrome based on mosaic inactivation of the Spink5 gene
- Therapeutic modulation of tissue kallikrein expression
- In vitro evidence that KLK14 regulates the components of the HGF/Met axis, pro-HGF and HGF-activator inhibitor 1A and 1B
- A computational analysis of the genetic and transcript diversity at the kallikrein locus
- Reviews
- Lymphocyte signaling and activation by the CARMA1-BCL10-MALT1 signalosome
- The power, pitfalls and potential of the nanodisc system for NMR-based studies
- Research Articles/Short Communications
- Cell Biology and Signaling
- Synergistic induction of cardiomyocyte differentiation from human bone marrow mesenchymal stem cells by interleukin 1β and 5-azacytidine
Articles in the same Issue
- Frontmatter
- Guest Editorial
- Highlight: remodelling the KLK landscape down under
- HIGHLIGHT: 6TH INTERNATIONAL SYMPOSIUM ON KALLIKREINS AND KALLIKREIN-RELATED PEPTIDASES
- Kallikrein(K1)-kinin-kininase (ACE) and end-organ damage in ischemia and diabetes: therapeutic implications
- Mechanistic insight from murine models of Netherton syndrome
- Development of molecules stimulating the activity of KLK3 – an update
- Exploring the active site binding specificity of kallikrein-related peptidase 5 (KLK5) guides the design of new peptide substrates and inhibitors
- Structural basis for the Zn2+ inhibition of the zymogen-like kallikrein-related peptidase 10
- Clinical relevance of kallikrein-related peptidase 6 (KLK6) and 8 (KLK8) mRNA expression in advanced serous ovarian cancer
- Kallikrein-related peptidase 6 exacerbates disease in an autoimmune model of multiple sclerosis
- A viable mouse model for Netherton syndrome based on mosaic inactivation of the Spink5 gene
- Therapeutic modulation of tissue kallikrein expression
- In vitro evidence that KLK14 regulates the components of the HGF/Met axis, pro-HGF and HGF-activator inhibitor 1A and 1B
- A computational analysis of the genetic and transcript diversity at the kallikrein locus
- Reviews
- Lymphocyte signaling and activation by the CARMA1-BCL10-MALT1 signalosome
- The power, pitfalls and potential of the nanodisc system for NMR-based studies
- Research Articles/Short Communications
- Cell Biology and Signaling
- Synergistic induction of cardiomyocyte differentiation from human bone marrow mesenchymal stem cells by interleukin 1β and 5-azacytidine