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Lehto TPK, Kovanen RM, Lintula S, Malén A, Stürenberg C, Erickson A, Pulkka OP, Stenman UH, Diamandis EP, Rannikko A, Mirtti T, Koistinen H. Prognostic impact of kallikrein-related peptidase transcript levels in prostate cancer. Int J Cancer 2023. [PMID: 37139608 DOI: 10.1002/ijc.34551] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 03/26/2023] [Accepted: 04/11/2023] [Indexed: 05/05/2023]
Abstract
We aimed to study mRNA levels and prognostic impact of all 15 human kallikrein-related peptidases (KLKs) and their targets, proteinase-activated receptors (PARs), in surgically treated prostate cancer (PCa). Seventy-nine patients with localized grade group 2-4 PCas represented aggressive cases, based on metastatic progression during median follow-up of 11 years. Eighty-six patients with similar baseline characteristics, but no metastasis during follow-up, were assigned as controls. Transcript counts were detected with nCounter technology. KLK12 protein expression was investigated with immunohistochemistry. The effects of KLK12 and KLK15 were studied in LNCaP cells using RNA interference. KLK3, -2, -4, -11, -15, -10 and -12 mRNA, in decreasing order, were expressed over limit of detection (LOD). The expression of KLK2, -3, -4 and -15 was decreased and KLK12 increased in aggressive cancers, compared to controls (P < .05). Low KLK2, -3 and -15 expression was associated with short metastasis-free survival (P < .05) in Kaplan-Meier analysis. PAR1 and -2 were expressed over LOD, and PAR1 expression was higher, and PAR2 lower, in aggressive cases than controls. Together, KLKs and PARs improved classification of metastatic and lethal disease over grade, pathological stage and prostate-specific antigen combined, in random forest analyses. Strong KLK12 immunohistochemical staining was associated with short metastasis-free and PCa-specific survival in Kaplan-Meier analysis (P < .05). Knock-down of KLK15 reduced colony formation of LNCaP cells grown on Matrigel basement membrane preparation. These results support the involvement of several KLKs in PCa progression, highlighting, that they may serve as prognostic PCa biomarkers.
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Affiliation(s)
- Timo-Pekka K Lehto
- Department of Pathology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Department of Urology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Research Program in Systems Oncology, University of Helsinki, Helsinki, Finland
| | - Ruusu-Maaria Kovanen
- Department of Pathology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Research Program in Systems Oncology, University of Helsinki, Helsinki, Finland
- Department of Clinical Chemistry and Haematology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Susanna Lintula
- Department of Clinical Chemistry and Haematology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Adrian Malén
- Department of Pathology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Carolin Stürenberg
- Department of Pathology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Research Program in Systems Oncology, University of Helsinki, Helsinki, Finland
| | - Andrew Erickson
- Department of Pathology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Research Program in Systems Oncology, University of Helsinki, Helsinki, Finland
- iCAN-Digital Precision Cancer Medicine Flagship, Helsinki, Finland
| | - Olli-Pekka Pulkka
- Laboratory of Molecular Oncology, Department of Oncology, University of Helsinki, Helsinki, Finland
| | - Ulf-Håkan Stenman
- Department of Clinical Chemistry and Haematology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Eleftherios P Diamandis
- Department of Pathology and Laboratory Medicine, Mount Sinai Hospital, Toronto, Ontario, Canada
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Antti Rannikko
- Department of Urology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Research Program in Systems Oncology, University of Helsinki, Helsinki, Finland
- iCAN-Digital Precision Cancer Medicine Flagship, Helsinki, Finland
| | - Tuomas Mirtti
- Department of Pathology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Research Program in Systems Oncology, University of Helsinki, Helsinki, Finland
- iCAN-Digital Precision Cancer Medicine Flagship, Helsinki, Finland
- Department of Biomedical Engineering, School of Medicine, Emory University, Atlanta, Georgia, USA
| | - Hannu Koistinen
- Department of Clinical Chemistry and Haematology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
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Dicitore A, Bacalini MG, Saronni D, Gaudenzi G, Cantone MC, Gelmini G, Grassi ES, Gentilini D, Borghi MO, Di Blasio AM, Persani L, Garagnani P, Franceschi C, Vitale G. Role of Epigenetic Therapy in the Modulation of Tumor Growth and Migration in Human Castration-Resistant Prostate Cancer Cells with Neuroendocrine Differentiation. Neuroendocrinology 2022; 112:580-594. [PMID: 34348348 DOI: 10.1159/000518801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 07/29/2021] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Neuroendocrine transdifferentiation (NED) of prostate cancer (PC) cells is associated with the development of resistance to antiandrogen therapy and poor prognosis in patients with castration-resistant PC (CRPC). Many of the molecular events, involved in NED, appear to be mediated by epigenetic mechanisms. In this study, we evaluated the antitumor activity and epigenetic modulation of 2 epigenetic drugs, such as the demethylating agent 5-aza-2'-deoxycytidine (AZA) and the methyl donor S-adenosylmethionine (SAM), in 2 human CRPC cell lines with NED (DU-145 and PC-3). METHODS The effects of AZA and SAM on cell viability, cell cycle, apoptosis, migration, and genome-wide DNA methylation profiling have been evaluated. RESULTS Both drugs showed a prominent antitumor activity in DU-145 and PC-3 cells, through perturbation of cell cycle progression, induction of apoptosis, and inhibition of cell migration. AZA and SAM reversed NED in DU-145 and PC-3, respectively. Moreover, AZA treatment modified DNA methylation pattern in DU-145 cells, sustaining a pervasive hypomethylation of the genome, with a relevant effect on several pathways involved in the regulation of cell proliferation, apoptosis, and cell migration, in particular Wnt/β-catenin. CONCLUSIONS A relevant antitumor activity of these epigenetic drugs on CRPC cell lines with NED opens a new scenario in the therapy of this lethal variant of PC.
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Affiliation(s)
- Alessandra Dicitore
- Istituto Auxologico Italiano, IRCCS, Laboratory of Geriatric and Oncologic Neuroendocrinology Research, Milan, Italy
| | | | - Davide Saronni
- Department of Medical Biotechnology and Translational Medicine (BIOMETRA), University of Milan, Milan, Italy
| | - Germano Gaudenzi
- Istituto Auxologico Italiano, IRCCS, Laboratory of Geriatric and Oncologic Neuroendocrinology Research, Milan, Italy
| | - Maria Celeste Cantone
- Department of Medical Biotechnology and Translational Medicine (BIOMETRA), University of Milan, Milan, Italy
| | - Giulia Gelmini
- Laboratory of Endocrine and Metabolic Research, Istituto Auxologico Italiano IRCCS, Milan, Italy
| | - Elisa Stellaria Grassi
- Department of Medical Biotechnology and Translational Medicine (BIOMETRA), University of Milan, Milan, Italy
| | - Davide Gentilini
- Department of Brain and Behavioral Sciences, University of Pavia, Pavia, Italy
- Istituto Auxologico Italiano IRCCS, Bioinformatics and Statistical Genomics Unit, Milan, Italy
| | - Maria Orietta Borghi
- Istituto Auxologico Italiano, IRCCS, Experimental Laboratory of Immuno-rheumatology, Milan, Italy
- Department of Clinical Sciences and Community Health (DISCCO), University of Milan, Milan, Italy
| | | | - Luca Persani
- Department of Medical Biotechnology and Translational Medicine (BIOMETRA), University of Milan, Milan, Italy
- Laboratory of Endocrine and Metabolic Research, Istituto Auxologico Italiano IRCCS, Milan, Italy
| | - Paolo Garagnani
- Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
| | - Claudio Franceschi
- IRCCS Istituto delle Scienze Neurologiche di Bologna, Bologna, Italy
- Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
- Department of Applied Mathematics, Institute of Information Technology, Mathematics and Mechanics, Lobachevsky State University of Nizhny Novgorod-National Research University, Nizhny Novgorod, Russian Federation
| | - Giovanni Vitale
- Istituto Auxologico Italiano, IRCCS, Laboratory of Geriatric and Oncologic Neuroendocrinology Research, Milan, Italy
- Department of Medical Biotechnology and Translational Medicine (BIOMETRA), University of Milan, Milan, Italy
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Filippou PS, Ren AH, Bala S, Papaioannou MD, Brinc D, Prassas I, Karakosta T, Diamandis EP. Biochemical characterization of human tissue kallikrein 15 and examination of its potential role in cancer. Clin Biochem 2018; 58:108-115. [PMID: 29928903 DOI: 10.1016/j.clinbiochem.2018.06.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 05/25/2018] [Accepted: 06/12/2018] [Indexed: 01/11/2023]
Abstract
OBJECTIVE Human tissue kallikrein 15 (KLK15) is the last cloned member of the KLK-related gene family. Despite being implicated in multiple cancers, its pathophysiological role remains unknown. We aimed to biochemically characterize KLK15 and preliminarily study its role in cancer. DESIGN & METHODS Recombinant KLK15 protein was produced, purified to homogeneity and quantified by mass spectrometry (parallel reaction monitoring analysis). We profiled the enzymatic activity of KLK15 using fluorogenic peptide substrates, and performed kinetic analysis to discover the cleavage sites. As KLK15 has mainly been associated with prostate cancer, we used a degradomic approach and subsequent KEGG pathway analysis to identify a number of putative protein substrates in the KLK15-treated prostate cancer cell line PC3. RESULTS We discovered trypsin-like activity in KLK15, finding that it cleaves preferentially after arginine (R). The enzymatic activity of KLK15 was regulated by different factors such as pH, cations and serine protease inhibitors. Notably, we revealed that KLK15 most likely interacts with the extracellular matrix (ECM) receptor group. CONCLUSION To our knowledge, this is the first study that experimentally verifies the trypsin-like activity of KLK15. We show here for the first time that KLK15 may be able to cleave many ECM components, similar to several members of the KLK family. Thus the protease could potentially be linked to tumorigenesis by promoting metastasis via this mechanism.
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Affiliation(s)
- Panagiota S Filippou
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada; Department of Clinical Biochemistry, University Health Network, Toronto, Canada
| | - Annie H Ren
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada; Mount Sinai Hospital, Lunenfeld-Tanenbaum Research Institute, Toronto, Canada
| | - Sudarshan Bala
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada
| | | | - Davor Brinc
- Department of Clinical Biochemistry, University Health Network, Toronto, Canada
| | - Ioannis Prassas
- Department of Pathology and Laboratory Medicine, Mount Sinai Hospital, Toronto, Canada
| | - Theano Karakosta
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada; Department of Clinical Biochemistry, University Health Network, Toronto, Canada
| | - Eleftherios P Diamandis
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada; Department of Clinical Biochemistry, University Health Network, Toronto, Canada; Mount Sinai Hospital, Lunenfeld-Tanenbaum Research Institute, Toronto, Canada; Department of Pathology and Laboratory Medicine, Mount Sinai Hospital, Toronto, Canada.
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Kolin DL, Sy K, Rotondo F, Bassily MN, Kovacs K, Brezden-Masley C, Streutker CJ, Yousef GM. Prognostic significance of human tissue kallikrein-related peptidases 11 and 15 in gastric cancer. Tumour Biol 2015. [PMID: 26224476 DOI: 10.1007/s13277-015-3802-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Human tissue kallikrein-related peptidases (KLK) are a group of 15 serine proteases which have been investigated as potential cancer biomarkers. This study determined the prognostic significance of KLK 11 and 15 expression levels in gastric carcinoma specimens. Expression of KLK11 and KLK15 was assessed by immunohistochemistry staining on a tissue microarray constructed from 113 gastrectomy specimens from patients with gastric carcinoma. To minimize inter-observer variability, expression levels were quantified using an automated algorithm. Epithelial and stromal staining were assessed separately. Both KLK11 and KLK15 were expressed in gastric carcinoma. There was no significant correlation between either KLK11 or KLK15 expression and the presence of lymph node metastases or Lauren classification (intestinal vs. diffuse). Higher levels of KLK11 expression in gastric carcinoma were associated with significantly worse overall survival (p = 0.008), and a multivariate analysis showed that it had prognostic value independent of tumor stage and differentiation (p = 0.004). Variations in KLK15 expression were not significantly associated with prognosis. KLK11 shows promise as a potential independent prognostic marker for gastric carcinoma.
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Affiliation(s)
- David L Kolin
- Department of Laboratory Medicine and the Keenan Research Centre for Biomedical Science of St. Michael's Hospital, Toronto, M5B 1W8, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, M5S 1A8, Canada
| | - Keiyan Sy
- Department of Pathology, Credit Valley Hospital, Mississauga, ON, L5M 2N1, Canada
| | - Fabio Rotondo
- Department of Laboratory Medicine and the Keenan Research Centre for Biomedical Science of St. Michael's Hospital, Toronto, M5B 1W8, Canada
| | - Mena N Bassily
- Department of Community Medicine and Public Health, Menoufiya University, Shebeen el kom, Egypt
| | - Kalman Kovacs
- Department of Laboratory Medicine and the Keenan Research Centre for Biomedical Science of St. Michael's Hospital, Toronto, M5B 1W8, Canada
| | - Christine Brezden-Masley
- Department of Medicine and Hematology-Oncology, St. Michael's Hospital, Toronto, M5B 1W8, Canada
| | - Catherine J Streutker
- Department of Laboratory Medicine and the Keenan Research Centre for Biomedical Science of St. Michael's Hospital, Toronto, M5B 1W8, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, M5S 1A8, Canada
| | - George M Yousef
- Department of Laboratory Medicine and the Keenan Research Centre for Biomedical Science of St. Michael's Hospital, Toronto, M5B 1W8, Canada. .,Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, M5S 1A8, Canada. .,Department of Laboratory Medicine, St. Michael's Hospital, 30 Bond St, Toronto, ON, M5B 1W8, Canada.
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Scorilas A, Mavridis K. Predictions for the future of kallikrein-related peptidases in molecular diagnostics. Expert Rev Mol Diagn 2014; 14:713-22. [PMID: 24927162 DOI: 10.1586/14737159.2014.928207] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Kallikrein-related peptidases (KLKs) form a cancer-related ensemble of serine proteases. This multigene family hosts the most widely used cancer biomarker that is PSA-KLK3, with millions of tests performed annually worldwide. The present report provides an overview of the biomarker potential of the extended KLK family (KLK1-KLK15) in various disease settings and envisages approaches that could lead to additional KLK-driven applications in future molecular diagnostics. Particular focus is given on the inclusion of KLKs into multifaceted cancer biomarker panels that provide enhanced diagnostic, prognostic and/or predictive accuracy in several human malignancies. Such panels have been described so far for prostate, ovarian, lung and colorectal cancers. The role of KLKs as biomarkers in non-malignant disease settings, such as Alzheimer's disease and multiple sclerosis, is also commented upon. Predictions are given on the challenges and future directions regarding clinically oriented KLK research.
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Affiliation(s)
- Andreas Scorilas
- Department of Biochemistry and Molecular Biology, University of Athens, Panepistimiopolis, Athens 157 01, Greece
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Stephan C, Ralla B, Jung K. Prostate-specific antigen and other serum and urine markers in prostate cancer. Biochim Biophys Acta Rev Cancer 2014; 1846:99-112. [PMID: 24727384 DOI: 10.1016/j.bbcan.2014.04.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2013] [Revised: 03/24/2014] [Accepted: 04/01/2014] [Indexed: 11/16/2022]
Abstract
Prostate-specific antigen (PSA) is one of the most widely used tumor markers, and strongly correlates with the risk of harboring from prostate cancer (PCa). This risk is visible already several years in advance but PSA has severe limitations for PCa detection with its low specificity and low negative predictive value. There is an urgent need for new biomarkers especially to detect clinically significant and aggressive PCa. From all PSA-based markers, the FDA-approved Prostate Health Index (phi) shows improved specificity over percent free and total PSA. Other serum kallikreins or sarcosine in serum or urine show more diverging data. In urine, the FDA-approved prostate cancer gene 3 (PCA3) has also proven its utility in the detection and management of early PCa. However, some aspects on its correlation with aggressiveness and the low sensitivity at very high values have to be re-examined. The detection of a fusion of the androgen regulated TMPRSS2 gene with the ERG oncogene (from the ETS family), which acts as transcription factor gene, in tissue of ~50% of all PCa patients was one milestone in PCa research. When combining the urinary assays for TMPRSS2:ERG and PCA3, an improved accuracy for PCa detection is visible. PCA3 and phi as the best available PCa biomarkers show an equal performance in direct comparisons.
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Affiliation(s)
- Carsten Stephan
- Department of Urology, Charité - Universitätsmedizin Berlin, Berlin, Germany; Berlin Institute for Urologic Research, Berlin, Germany.
| | - Bernhard Ralla
- Department of Urology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Klaus Jung
- Department of Urology, Charité - Universitätsmedizin Berlin, Berlin, Germany; Berlin Institute for Urologic Research, Berlin, Germany
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Zhao L, Yu N, Guo T, Hou Y, Zeng Z, Yang X, Hu P, Tang X, Wang J, Liu M. Tissue Biomarkers for Prognosis of Prostate Cancer: A Systematic Review and Meta-analysis. Cancer Epidemiol Biomarkers Prev 2014; 23:1047-54. [DOI: 10.1158/1055-9965.epi-13-0696] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Fendler A, Jung M, Stephan C, Erbersdobler A, Jung K, Yousef GM. The antiapoptotic function of miR-96 in prostate cancer by inhibition of FOXO1. PLoS One 2013; 8:e80807. [PMID: 24260486 PMCID: PMC3834337 DOI: 10.1371/journal.pone.0080807] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Accepted: 10/16/2013] [Indexed: 01/17/2023] Open
Abstract
microRNAs (miRNAs) are small molecules that regulate gene expression posttranscriptionally. In a previous study, we identified miR-96 to be upregulated in prostate cancer specimens in comparison to normal adjacent tissue and to be an independent marker of biochemical relapse in a multivariate prediction model. Therefore, we investigated the functional role of miR-96 in prostate carcinogenesis. LNCaP and DU145 prostate cancer cells were transiently transfected with miR-96 precursors and phenotypic changes were analyzed. The miR-96 increased proliferation and impaired apoptosis induced by camptothecine in these cells. In silico target prediction analysis identified FOXO1 as potential pro-apoptotic miR-96 target. miR-96 was able to bind to both bindings sites in the FOXO1 3' UTR in a luciferase reporter gene assay. Overexpression of miR-96 in LNCaP cells resulted in a reduced FOXO1 expression. Overexpression of FOXO1 induced a strong apoptotic phenotype that was partially rescued by coexpression of miR-96. RT-qPCR and immunohistochemistry of 69 prostate cancer specimens revealed a downregulation of FOXO1 and an inverse correlation of miR-96 and FOXO1 protein expression. In conclusion, we show that miR-96 can regulate apoptosis in prostate cancer, by inhibiting the FOXO1 transcription factor.
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Affiliation(s)
- Annika Fendler
- Department of Urology, Charité – University Hospital, Berlin, Germany
- Berlin Institute of Urologic Research, Berlin, Germany
- * E-mail:
| | - Monika Jung
- Department of Urology, Charité – University Hospital, Berlin, Germany
| | - Carsten Stephan
- Department of Urology, Charité – University Hospital, Berlin, Germany
- Berlin Institute of Urologic Research, Berlin, Germany
| | | | - Klaus Jung
- Department of Urology, Charité – University Hospital, Berlin, Germany
- Berlin Institute of Urologic Research, Berlin, Germany
| | - George M. Yousef
- Department of Laboratory Medicine, and the Keenan Research Centre in the Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Canada
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada
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Fonseca-Sanchéz MA, Pérez-Plasencia C, Fernández-Retana J, Arechaga-Ocampo E, Marchat LA, Rodríguez-Cuevas S, Bautista-Piña V, Arellano-Anaya ZE, Flores-Pérez A, Diaz-Chávez J, López-Camarillo C. microRNA-18b is upregulated in breast cancer and modulates genes involved in cell migration. Oncol Rep 2013; 30:2399-410. [PMID: 23970382 DOI: 10.3892/or.2013.2691] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Accepted: 08/02/2013] [Indexed: 11/06/2022] Open
Abstract
microRNAs are small non-coding RNAs of ~22 nucleotides that function at post-transcriptional level as negative regulators of gene expression. Aberrant expression of microRNAs could promote uncontrolled proliferation, migration and invasion of human cancer cells. In this study, we analyzed the expression of microRNA-18b (miR-18b) in breast cancer cell lines and in a set of clinical specimens. Our results showed that miR-18b was upregulated in four out of five breast cancer cell lines and also in breast tumors. In order to identify potential gene targets, we carried out transcriptional profiling of MDA-MB-231 breast cancer cells that ectopically expressed miR-18b. Our results showed that 263 genes were significantly modulated in miR-18b-deficient cells (fold change >1.5; P≤0.05). We found that knock-down of miR-18b induced the upregulation of 55 olfactory receptor (OR) genes and nine genes (NLRP7, KLK3, OLFM3, POSTN, MAGED4B, KIR3DL3, CRX, SEMG1 and CEACAM5) with key roles in cell migration and metastasis. Consistently, we found that ectopic inhibition of miR-18b suppressed the migration of two breast cancer cell models in vitro. In conclusion, we have uncovered genes directly or indirectly modulated by miR-18b which may represent potential therapeutic targets in breast cancer. Our data also pointed out a role of miR-18b in migration of breast cancer cells.
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Affiliation(s)
- Miguel A Fonseca-Sanchéz
- Oncogenomics and Cancer Proteomics Laboratory, Genomics Sciences Program, Autonomous University of Mexico City, Mexico City, Mexico
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Mavridis K, Stravodimos K, Scorilas A. Quantified KLK15 gene expression levels discriminate prostate cancer from benign tumors and constitute a novel independent predictor of disease progression. Prostate 2013; 73:1191-201. [PMID: 23620432 DOI: 10.1002/pros.22667] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Accepted: 02/26/2013] [Indexed: 11/07/2022]
Abstract
BACKGROUND Several transcript variants of the kallikrein-related peptidase 15 gene (KLK15) have been identified up to now. The classical KLK15 mRNA isoform encodes for a non-truncated, functional protein. Aberrant KLK15 expression is found in breast, ovarian, and prostate cancers. Our aim in this present study was the specific quantitative expression analysis of the classical KLK15 mRNA transcript in prostate tumors and the examination of its clinical significance in prostate cancer. METHODS We isolated total RNA from 150 prostate tissue specimens and, following cDNA synthesis, the expression of KLK15 classical mRNA transcript was measured via quantitative Real-Time PCR using the TaqMan® chemistry. HPRT1 was used as a reference gene, and the absolute quantification approach, through the incorporation of standard curves, was applied for the calculation of normalized KLK15 expression. RESULTS KLK15 expression levels were significantly upregulated in malignant compared to benign samples (P < 0.001). The discriminatory value of KLK15 was confirmed by ROC curve and logistic regression analysis (both P < 0.001). KLK15 was also associated with advanced pathological stage (P = 0.023). KLK15-positive prostate cancer patients presented significantly shorter progression-free survival intervals, determined by biochemical relapse (P = 0.006), compared to KLK15-negative ones. Multivariate Cox regression analysis revealed that KLK15 expression is an independent predictor of biochemical recurrence (HR = 3.36, P = 0.038). CONCLUSIONS The present study unravels the important role of quantified KLK15 classical mRNA expression levels as a novel biomarker helpful for the differential diagnosis and prognosis of prostate cancer patients.
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Affiliation(s)
- Konstantinos Mavridis
- Department of Biochemistry and Molecular Biology, University of Athens, Athens, Greece
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11
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Association between Prostinogen (KLK15) genetic variants and prostate cancer risk and aggressiveness in Australia and a meta-analysis of GWAS data. PLoS One 2011; 6:e26527. [PMID: 22132073 PMCID: PMC3223160 DOI: 10.1371/journal.pone.0026527] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2011] [Accepted: 09/28/2011] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Kallikrein 15 (KLK15)/Prostinogen is a plausible candidate for prostate cancer susceptibility. Elevated KLK15 expression has been reported in prostate cancer and it has been described as an unfavorable prognostic marker for the disease. OBJECTIVES We performed a comprehensive analysis of association of variants in the KLK15 gene with prostate cancer risk and aggressiveness by genotyping tagSNPs, as well as putative functional SNPs identified by extensive bioinformatics analysis. METHODS AND DATA SOURCES: Twelve out of 22 SNPs, selected on the basis of linkage disequilibrium pattern, were analyzed in an Australian sample of 1,011 histologically verified prostate cancer cases and 1,405 ethnically matched controls. Replication was sought from two existing genome wide association studies (GWAS): the Cancer Genetic Markers of Susceptibility (CGEMS) project and a UK GWAS study. RESULTS Two KLK15 SNPs, rs2659053 and rs3745522, showed evidence of association (p<0.05) but were not present on the GWAS platforms. KLK15 SNP rs2659056 was found to be associated with prostate cancer aggressiveness and showed evidence of association in a replication cohort of 5,051 patients from the UK, Australia, and the CGEMS dataset of US samples. A highly significant association with Gleason score was observed when the data was combined from these three studies with an Odds Ratio (OR) of 0.85 (95% CI = 0.77-0.93; p = 2.7×10(-4)). The rs2659056 SNP is predicted to alter binding of the RORalpha transcription factor, which has a role in the control of cell growth and differentiation and has been suggested to control the metastatic behavior of prostate cancer cells. CONCLUSIONS Our findings suggest a role for KLK15 genetic variation in the etiology of prostate cancer among men of European ancestry, although further studies in very large sample sets are necessary to confirm effect sizes.
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Batra J, Nagle CM, O'Mara T, Higgins M, Dong Y, Tan OL, Lose F, Skeie LM, Srinivasan S, Bolton KL, Song H, Ramus SJ, Gayther SA, Pharoah PDP, Kedda MA, Spurdle AB, Clements JA. A Kallikrein 15 (KLK15) single nucleotide polymorphism located close to a novel exon shows evidence of association with poor ovarian cancer survival. BMC Cancer 2011; 11:119. [PMID: 21457553 PMCID: PMC3080344 DOI: 10.1186/1471-2407-11-119] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2010] [Accepted: 04/01/2011] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND KLK15 over-expression is reported to be a significant predictor of reduced progression-free survival and overall survival in ovarian cancer. Our aim was to analyse the KLK15 gene for putative functional single nucleotide polymorphisms (SNPs) and assess the association of these and KLK15 HapMap tag SNPs with ovarian cancer survival. RESULTS In silico analysis was performed to identify KLK15 regulatory elements and to classify potentially functional SNPs in these regions. After SNP validation and identification by DNA sequencing of ovarian cancer cell lines and aggressive ovarian cancer patients, 9 SNPs were shortlisted and genotyped using the Sequenom iPLEX Mass Array platform in a cohort of Australian ovarian cancer patients (N = 319). In the Australian dataset we observed significantly worse survival for the KLK15 rs266851 SNP in a dominant model (Hazard Ratio (HR) 1.42, 95% CI 1.02-1.96). This association was observed in the same direction in two independent datasets, with a combined HR for the three studies of 1.16 (1.00-1.34). This SNP lies 15 bp downstream of a novel exon and is predicted to be involved in mRNA splicing. The mutant allele is also predicted to abrogate an HSF-2 binding site. CONCLUSIONS We provide evidence of association for the SNP rs266851 with ovarian cancer survival. Our results provide the impetus for downstream functional assays and additional independent validation studies to assess the role of KLK15 regulatory SNPs and KLK15 isoforms with alternative intracellular functional roles in ovarian cancer survival.
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Affiliation(s)
- Jyotsna Batra
- Australian Prostate Cancer Research centre-Queensland and Institute of Health and Biomedical Innovation, Queensland University of Technology, Kelvin Grove, Brisbane, Queensland 4059, Australia
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