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Wani S, Humaira, Farooq I, Ali S, Rehman MU, Arafah A. Proteomic profiling and its applications in cancer research. Proteomics 2023. [DOI: 10.1016/b978-0-323-95072-5.00015-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
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2
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Matti B, Chapman D, Zargar-Shoshtari K. Ethnic and regional differences in the temporal trends of prostate cancer incidence and mortality in New Zealand. ANZ J Surg 2021; 91:2806-2816. [PMID: 34676954 DOI: 10.1111/ans.17263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Revised: 09/02/2021] [Accepted: 09/21/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND Prostate cancer (Pca) is the most frequently diagnosed cancer in New Zealand (NZ) men and the third leading cause of cancer deaths. Temporal changes in Pca incidence and mortality have not been reported despite changes in the Pca landscape. This study aims to analyse the temporal trends in Pca with focus on ethnic and regional variations. METHODS The study cohort was identified from the NZ Cancer Registry and the mortality collection databases. Men who were diagnosed with Pca between 2000 and 2018 were included in the incidence analysis. Men who died from Pca between 2000 and 2015 were included in the mortality analysis. Other data collected were ethnicity and geographical information. Pca incidence and mortality were calculated as age-standardized rates using the 2001 World Health Organization population. RESULTS A total of 58 966 men were diagnosed (incidence: 105.2 per 100 000) and 14 749 men died (mortality: 49.3 per 100 000) from Pca. When compared to European men, Māori and Asian men had significantly lower Pca incidence. Mortality rates demonstrated a steady decline, which was more prominent until 2010. Māori and Pacific men had higher mortality rates when compared to European men. In most recent years, the difference in mortality is decreasing for Māori but increasing for Pacific men. There were no regional differences in mortality. CONCLUSION Pca incidence in NZ has fluctuated over the last 20 years, while mortality rates have shown to steadily decline. Pca mortality was shown to disproportionately affect Māori and Pacific men.
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Affiliation(s)
- Bashar Matti
- Department of Surgery, University of Auckland, Auckland, New Zealand
| | - David Chapman
- Department of Surgery, University of Auckland, Auckland, New Zealand
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3
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Vassilev ZP, Gabarró MS, Kaye JA, Saltus CW, Riedel O, Scholle O, Mehtälä J, Korhonen P, Garbe E, Zong J. Incidence of second primary malignancies in metastatic castration-resistant prostate cancer: results from observational studies in three countries. Future Oncol 2020; 16:1889-1901. [DOI: 10.2217/fon-2020-0315] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Aim: This reports some of the first incidence rate (IR) estimates of second primary malignancies (SPMs) in men with metastatic castration-resistant prostate cancer (mCRPC) in three countries. Patients & methods: Claims data from the German Pharmacoepidemiological Research Database; registry data from the Prostate Cancer Data Base Sweden; and combined registry-claims data from the US Surveillance, Epidemiology and End Results-Medicare database were analyzed to obtain overall survival and incidence of SPMs in men with mCRPC. Results: SPMs occurred in 308 German (n = 2360), 273 Swedish (n = 2849) and 172 US (n = 2234) men with mCRPC. IRs of SPMs were 79.0 (95% CI: 70.4–88.4), 101.7 (95% CI: 90.3–114.5) and 59 (95% CI: 50–68) per 1000 person-years in German, Swedish and US cohorts, respectively. Conclusion: These studies report some of the first IR estimates of SPMs in men with mCRPC, providing a historical risk estimate of SPM in this patient population.
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Affiliation(s)
| | | | | | | | - Oliver Riedel
- Department of Clinical Epidemiology, Leibniz Institute for Prevention Research & Epidemiology – BIPS, Bremen, Germany
| | - Oliver Scholle
- Department of Clinical Epidemiology, Leibniz Institute for Prevention Research & Epidemiology – BIPS, Bremen, Germany
| | | | | | - Edeltraut Garbe
- Department of Clinical Epidemiology, Leibniz Institute for Prevention Research & Epidemiology – BIPS, Bremen, Germany
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4
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Challenges and Opportunities in Clinical Applications of Blood-Based Proteomics in Cancer. Cancers (Basel) 2020; 12:cancers12092428. [PMID: 32867043 PMCID: PMC7564506 DOI: 10.3390/cancers12092428] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 08/23/2020] [Accepted: 08/25/2020] [Indexed: 12/12/2022] Open
Abstract
Simple Summary The traditional approach in identifying cancer related protein biomarkers has focused on evaluation of a single peptide/protein in tissue or circulation. At best, this approach has had limited success for clinical applications, since multiple pathological tumor pathways may be involved during initiation or progression of cancer which diminishes the significance of a single candidate protein/peptide. Emerging sensitive proteomic based technologies like liquid chromatography mass spectrometry (LC-MS)-based quantitative proteomics can provide a platform for evaluating serial serum or plasma samples to interrogate secreted products of tumor–host interactions, thereby revealing a more “complete” repertoire of biological variables encompassing heterogeneous tumor biology. However, several challenges need to be met for successful application of serum/plasma based proteomics. These include uniform pre-analyte processing of specimens, sensitive and specific proteomic analytical platforms and adequate attention to study design during discovery phase followed by validation of discovery-level signatures for prognostic, predictive, and diagnostic cancer biomarker applications. Abstract Blood is a readily accessible biofluid containing a plethora of important proteins, nucleic acids, and metabolites that can be used as clinical diagnostic tools in diseases, including cancer. Like the on-going efforts for cancer biomarker discovery using the liquid biopsy detection of circulating cell-free and cell-based tumor nucleic acids, the circulatory proteome has been underexplored for clinical cancer biomarker applications. A comprehensive proteome analysis of human serum/plasma with high-quality data and compelling interpretation can potentially provide opportunities for understanding disease mechanisms, although several challenges will have to be met. Serum/plasma proteome biomarkers are present in very low abundance, and there is high complexity involved due to the heterogeneity of cancers, for which there is a compelling need to develop sensitive and specific proteomic technologies and analytical platforms. To date, liquid chromatography mass spectrometry (LC-MS)-based quantitative proteomics has been a dominant analytical workflow to discover new potential cancer biomarkers in serum/plasma. This review will summarize the opportunities of serum proteomics for clinical applications; the challenges in the discovery of novel biomarkers in serum/plasma; and current proteomic strategies in cancer research for the application of serum/plasma proteomics for clinical prognostic, predictive, and diagnostic applications, as well as for monitoring minimal residual disease after treatments. We will highlight some of the recent advances in MS-based proteomics technologies with appropriate sample collection, processing uniformity, study design, and data analysis, focusing on how these integrated workflows can identify novel potential cancer biomarkers for clinical applications.
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Miranda-Gonçalves V, Lameirinhas A, Henrique R, Baltazar F, Jerónimo C. The metabolic landscape of urological cancers: New therapeutic perspectives. Cancer Lett 2020; 477:76-87. [PMID: 32142920 DOI: 10.1016/j.canlet.2020.02.034] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Revised: 02/22/2020] [Accepted: 02/25/2020] [Indexed: 01/03/2023]
Abstract
Deregulation of cell metabolism is an established cancer hallmark that contributes to tumor initiation and progression, as well as tumor heterogeneity. In solid tumors, alterations in different metabolic pathways, including glycolysis, pentose phosphate pathway, glutaminolysis and fatty acid metabolism, support the high proliferative rates and macromolecule biosynthesis of cancer cells. Despite advances in therapy, urothelial tumors still exhibit high recurrence and mortality rates, especially in advanced stages of disease. These tumors harbor gene mutations and expression patterns which play an important role in metabolic reprogramming. Taking into account the unique metabolic features underlying carcinogenesis in these cancers, new and promising therapeutic targets based on metabolic alterations must be considered. Furthermore, the combination of metabolic inhibitors with conventional targeted therapies may improve effectiveness of treatments. This review will summarize the metabolic alterations present in urological tumors and the results with metabolic inhibitors currently available.
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Affiliation(s)
- Vera Miranda-Gonçalves
- Cancer Biology & Epigenetics Group-Research Center, Portuguese Oncology Institute of Porto (CI-IPOP), 4200-072, Porto, Portugal.
| | - Ana Lameirinhas
- Cancer Biology & Epigenetics Group-Research Center, Portuguese Oncology Institute of Porto (CI-IPOP), 4200-072, Porto, Portugal.
| | - Rui Henrique
- Cancer Biology & Epigenetics Group-Research Center, Portuguese Oncology Institute of Porto (CI-IPOP), 4200-072, Porto, Portugal; Department of Pathology and Molecular Immunology, Institute of Biomedical Sciences Abel Salazar- University of Porto (ICBAS-UP), 4050-313, Porto, Portugal; Department of Pathology, Portuguese Oncology Institute of Porto, 4200-072, Porto, Portugal.
| | - Fátima Baltazar
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal; ICVS/3Bs-PT Government Associate Laboratory, Braga, Guimarães, Portugal.
| | - Carmen Jerónimo
- Cancer Biology & Epigenetics Group-Research Center, Portuguese Oncology Institute of Porto (CI-IPOP), 4200-072, Porto, Portugal; Department of Pathology and Molecular Immunology, Institute of Biomedical Sciences Abel Salazar- University of Porto (ICBAS-UP), 4050-313, Porto, Portugal.
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6
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Yadav S, Hart SN, Hu C, Hillman D, Lee KY, Gnanaolivu R, Na J, Polley EC, Couch FJ, Kohli M. Contribution of Inherited DNA-Repair Gene Mutations to Hormone-Sensitive and Castrate-Resistant Metastatic Prostate Cancer and Implications for Clinical Outcome. JCO Precis Oncol 2019; 3:PO.19.00067. [PMID: 32923857 PMCID: PMC7446380 DOI: 10.1200/po.19.00067] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/19/2019] [Indexed: 12/30/2022] Open
Abstract
PURPOSE To compare the prevalence of germline mutations in metastatic hormone-sensitive prostate cancer (mHSPC) and metastatic castrate-resistant prostate cancer (mCRPC) and assess the impact of mutations on progression to castration resistance and overall survival. METHODS Targeted sequencing of germline DNA from 704 men (221 at the time of mHSPC and 483 at the time of mCRPC) enrolled in two advanced prostate cancer registries at Mayo Clinic between 2003 and 2013 was performed for 21 predisposition genes. Frequencies of pathogenic mutations were compared in patients and reference controls to identify genes enriched in metastatic prostate cancer. Multivariable Cox proportional hazards regression was used to identify predictors of progression to mCRPC and overall survival. RESULTS Sixty-eight germline mutations in 12 genes were identified in 66 men (9.4%). Mutations in ATM, BRCA2, CHEK2, FANCM, and TP53 were significantly enriched (odds ratio greater than 2.0) in the metastatic cohorts compared with reference controls. The frequency of germline mutations was similar for patients with mHSPC and mCRPC (11.8% v 8.3%; P = .16). The median time to progression from mHSPC to mCRPC was 23.1 and 32.5 months for patients with and without mutations, respectively (P = .96). Although older age at diagnosis, Gleason score greater than 7, elevated alkaline phosphatase level, and high volume of disease were associated with shorter duration of progression to mCRPC and poor overall survival, mutation status was not (progression to mCRPC hazard ratio, 0.81; 95% CI, 0.61 to 1.09; P = .17; overall survival hazard ratio, 1.00; 95% CI, 0.75 to 1.34; P = .98). CONCLUSION Similarly elevated rates of germline predisposition gene mutations in mHSPC and mCRPC suggest that germline genetic testing may help to guide medical management for all patients with advanced metastatic prostate cancer. Mutation status was not associated with shorter progression to mCRPC or poor overall survival.
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Affiliation(s)
| | | | | | | | | | | | - Jie Na
- Mayo Clinic, Rochester, MN
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7
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Interplay Between SOX9, Wnt/β-Catenin and Androgen Receptor Signaling in Castration-Resistant Prostate Cancer. Int J Mol Sci 2019; 20:ijms20092066. [PMID: 31027362 PMCID: PMC6540097 DOI: 10.3390/ijms20092066] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 04/23/2019] [Accepted: 04/24/2019] [Indexed: 12/21/2022] Open
Abstract
Androgen receptor (AR) signaling plays a key role not only in the initiation of prostate cancer (PCa) but also in its transition to aggressive and invasive castration-resistant prostate cancer (CRPC). However, the crosstalk of AR with other signaling pathways contributes significantly to the emergence and growth of CRPC. Wnt/β-catenin signaling facilitates ductal morphogenesis in fetal prostate and its anomalous expression has been linked with PCa. β-catenin has also been reported to form complex with AR and thus augment AR signaling in PCa. The transcription factor SOX9 has been shown to be the driving force of aggressive and invasive PCa cells and regulate AR expression in PCa cells. Furthermore, SOX9 has also been shown to propel PCa by the reactivation of Wnt/β-catenin signaling. In this review, we discuss the critical role of SOX9/AR/Wnt/β-catenin signaling axis in the development and progression of CRPC. The phytochemicals like sulforaphane and curcumin that can concurrently target SOX9, AR and Wnt/β-catenin signaling pathways in PCa may thus be beneficial in the chemoprevention of PCa.
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8
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Haiping C, Qi X, Dawei L, Qiang W. [Citron Rho-interacting serine/threonine kinase knockdown suppresses prostate cancer cell proliferation and metastasis by blocking Hippo-YAP pathway]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2019; 39:257-263. [PMID: 31068310 DOI: 10.12122/j.issn.1673-4254.2019.03.01] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
OBJECTIVE Citron Rho-interacting serine/threonine kinase (CIT) was identified recently as an oncogene involved in the progression of various malignant tumors, but its role in prostate cancer (PCa) remains unclear. In this study, we aimed to investigate the biological functions of CIT in PCa. METHODS We analyzed the expression of CIT in PCa tissues and its clinical correlations based on the Cancer Genome Atlas (TCGA) and Memorial Sloan-Kettering Cancer Center (MSKCC) dataset. We then examined the effects of RNA interference-mediated CIT silencing on the proliferation, migration and invasion of PC-3 cells using cell counting kit-8, wound healing assay and Transwell assay. We also investigated the effect of CIT silencing on epithelial-mesenchymal transition (EMT) and Hippo-Yap signaling pathway in the cells using Western blotting. RESULTS CIT expression was significantly elevated in PCa tissues from TCGA cohort (P < 0.05). MSKCC dataset analysis showed that an elevated expression of CIT was significantly correlated with N stage (P=0.001), distant metastasis (P < 0.001), Gleason score (P=0.010) and PSA (P=0.004). In cultured PC-3 cells, knockdown of CIT significantly inhibited cell proliferation, migration and invasion, reversed the EMT phenotype and decreased the expression and activity of YAP. CONCLUSIONS CIT might function as an oncogene in PCa by modulating the Hippo-YAP signaling pathway and serve as a candidate therapeutic target for PCa.
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Affiliation(s)
- Chen Haiping
- Department of Urology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.,Department of Urology, Fifth Affiliated Hospital of Southern Medical University, Guangzhou 510900, China
| | - Xiang Qi
- Department of Urology, Fifth Affiliated Hospital of Southern Medical University, Guangzhou 510900, China
| | - Liu Dawei
- Department of Urology, Fifth Affiliated Hospital of Southern Medical University, Guangzhou 510900, China
| | - Wei Qiang
- Department of Urology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
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9
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Cell division cycle 20 (CDC20) drives prostate cancer progression via stabilization of β-catenin in cancer stem-like cells. EBioMedicine 2019; 42:397-407. [PMID: 30904606 PMCID: PMC6491421 DOI: 10.1016/j.ebiom.2019.03.032] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Revised: 02/28/2019] [Accepted: 03/12/2019] [Indexed: 12/23/2022] Open
Abstract
Background Cell division cycle 20 (CDC20) is frequently overexpressed in malignant tumours and involved in the differentiation process of hematopoietic stem cells. However, the role of CDC20 in prostate cancer stem-like cells (CSCs) remains poorly understood. Methods The expression of CDC20, CD44, β-catenin were examined in prostate cancer specimens by immunohistochemistry assay, the role of CDC20 on the stem-like properties of prostate CSCs was accessed by real-time quantitive PCR, spheroid formation, in vitro and in vivo limiting dilution assay. Finding CDC20 was associated with malignant progression of prostate cancer, the patients with both high expression CDC20 and CD44 or β-catenin were associated with more aggressive clinicopathological features and poor prognosis. CDC20 was usually enriched in CD44+ prostate CSCs. Knockdown of CDC20 could inhibit the expression of stemness-related genes, self-renewal ability, chemo-resistance, invasion capability and tumorigenicity of CD44+ prostate CSCs. Mechanistically, CDC20 promoted degradation of Axin1, the core member of β-catenin destruction complex, sequentially reduced the phosphorylation of β-catenin, promoting the latter into the nucleus, thereby enhancing the self-renewal capacity of CD44+ prostate CSCs. Interpretation Our results indicated that CDC20 maintains the self-renewal ability of CD44+ prostate CSCs by promoting nuclear translocation and trans-activation of β-catenin. In addition, CDC20 combined with CD44 or β-catenin can serve as an important indicator for prognosis of patients with prostate cancer.
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Zhang Z, Cheng L, Li J, Farah E, Atallah NM, Pascuzzi PE, Gupta S, Liu X. Inhibition of the Wnt/β-Catenin Pathway Overcomes Resistance to Enzalutamide in Castration-Resistant Prostate Cancer. Cancer Res 2018; 78:3147-3162. [PMID: 29700003 DOI: 10.1158/0008-5472.can-17-3006] [Citation(s) in RCA: 114] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 02/07/2018] [Accepted: 04/16/2018] [Indexed: 11/16/2022]
Abstract
Enzalutamide is a second-generation nonsteroidal antiandrogen clinically approved for the treatment of castration-resistant prostate cancer (CRPC), yet resistance to endocrine therapy has limited its success in this setting. Although the androgen receptor (AR) has been associated with therapy failure, the mechanisms underlying this failure have not been elucidated. Bioinformatics analysis predicted that activation of the Wnt/β-catenin pathway and its interaction with AR play a major role in acquisition of enzalutamide resistance. To validate the finding, we show upregulation of β-catenin and AR in enzalutamide-resistant cells, partially due to reduction of β-TrCP-mediated ubiquitination. Although activation of the Wnt/β-catenin pathway in enzalutamide-sensitive cells led to drug resistance, combination of β-catenin inhibitor ICG001 with enzalutamide inhibited expression of stem-like markers, cell proliferation, and tumor growth synergistically in various models. Analysis of clinical datasets revealed a molecule pattern shift in different stages of prostate cancer, where we detected a significant correlation between AR and β-catenin expression. These data identify activation of the Wnt/β-catenin pathway as a major mechanism contributing to enzalutamide resistance and demonstrate the potential to stratify patients with high risk of said resistance.Significance: Wnt/β-catenin inhibition resensitizes prostate cancer cells to enzalutamide. Cancer Res; 78(12); 3147-62. ©2018 AACR.
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Affiliation(s)
| | - Lijun Cheng
- Department of Biomedical Informatics, The Ohio State University, Columbus, Ohio
| | - Jie Li
- Department of Biochemistry, Purdue University, West Lafayette, Indiana
| | - Elia Farah
- Department of Biochemistry, Purdue University, West Lafayette, Indiana
| | - Nadia M Atallah
- Center for Cancer Research, Purdue University, West Lafayette, Indiana
| | | | - Sanjay Gupta
- Department of Urology, Case Western Reserve University, School of Medicine, Cleveland, Ohio
| | - Xiaoqi Liu
- Department of Biochemistry, Purdue University, West Lafayette, Indiana. .,Center for Cancer Research, Purdue University, West Lafayette, Indiana
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Marques-Magalhães Â, Graça I, Henrique R, Jerónimo C. Targeting DNA Methyltranferases in Urological Tumors. Front Pharmacol 2018; 9:366. [PMID: 29706891 PMCID: PMC5909196 DOI: 10.3389/fphar.2018.00366] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2017] [Accepted: 03/28/2018] [Indexed: 12/14/2022] Open
Abstract
Urological cancers are a heterogeneous group of malignancies accounting for a considerable proportion of cancer-related morbidity and mortality worldwide. Aberrant epigenetic traits, especially altered DNA methylation patterns constitute a hallmark of these tumors. Nonetheless, these alterations are reversible, and several efforts have been carried out to design and test several epigenetic compounds that might reprogram tumor cell phenotype back to a normal state. Indeed, several DNMT inhibitors are currently under evaluation for therapeutic efficacy in clinical trials. This review highlights the critical role of DNA methylation in urological cancers and summarizes the available data on pre-clinical assays and clinical trials with DNMT inhibitors in bladder, kidney, prostate, and testicular germ cell cancers.
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Affiliation(s)
- Ângela Marques-Magalhães
- Cancer Biology and Epigenetics Group - Research Center, Portuguese Oncology Institute of Porto, Porto, Portugal
| | - Inês Graça
- Cancer Biology and Epigenetics Group - Research Center, Portuguese Oncology Institute of Porto, Porto, Portugal
| | - Rui Henrique
- Cancer Biology and Epigenetics Group - Research Center, Portuguese Oncology Institute of Porto, Porto, Portugal.,Department of Pathology, Portuguese Oncology Institute of Porto, Porto, Portugal.,Department of Pathology and Molecular Immunology, Institute of Biomedical Sciences Abel Salazar, University of Porto, Porto, Portugal
| | - Carmen Jerónimo
- Cancer Biology and Epigenetics Group - Research Center, Portuguese Oncology Institute of Porto, Porto, Portugal.,Department of Pathology and Molecular Immunology, Institute of Biomedical Sciences Abel Salazar, University of Porto, Porto, Portugal
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Stocking JJ, Fiandalo MV, Pop EA, Wilton JH, Azabdaftari G, Mohler JL. Characterization of Prostate Cancer in a Functional Eunuch. J Natl Compr Canc Netw 2017; 14:1054-60. [PMID: 27587619 DOI: 10.6004/jnccn.2016.0116] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Accepted: 06/01/2016] [Indexed: 11/17/2022]
Abstract
BACKGROUND Eunuchs rarely, if ever, develop prostate cancer (CaP). This article reports on a 62-year-old functional eunuch from prepubertal mumps orchitis who developed clinically localized CaP. METHODS Serum and CaP and benign prostate tissue androgen levels were measured using a validated liquid chromatography-tandem mass spectrometry assay. The assay measures testosterone; dihydrotestosterone (DHT); the adrenal androgens, androstenedione and dehydroepiandrosterone; and the androgen metabolites, androsterone and androstanedione. Gene and protein expression levels of androgen metabolism enzymes, and androgen receptor and androgen-regulated genes were measured using quantitative reverse-transcription polymerase chain reaction and immunohistochemistry, respectively. RESULTS Intracrine androgen metabolism produced tissue DHT when serum and tissue testosterone levels were castrate and undetectable, respectively. Androgen receptor, androgen-regulated, and androgen metabolism enzyme genes were expressed but at lower levels in CaP than benign tissues. CONCLUSIONS DHT was synthesized using the primary backdoor androgen metabolism pathway and not using androstenedione or dehydroepiandrosterone via the frontdoor or secondary backdoor pathways.
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Affiliation(s)
- John J Stocking
- From the Departments of Urology, Pharmacology and Therapeutics, and Pathology, Roswell Park Cancer Institute, Buffalo, New York
| | - Michael V Fiandalo
- From the Departments of Urology, Pharmacology and Therapeutics, and Pathology, Roswell Park Cancer Institute, Buffalo, New York
| | - Elena A Pop
- From the Departments of Urology, Pharmacology and Therapeutics, and Pathology, Roswell Park Cancer Institute, Buffalo, New York
| | - John H Wilton
- From the Departments of Urology, Pharmacology and Therapeutics, and Pathology, Roswell Park Cancer Institute, Buffalo, New York
| | - Gissou Azabdaftari
- From the Departments of Urology, Pharmacology and Therapeutics, and Pathology, Roswell Park Cancer Institute, Buffalo, New York
| | - James L Mohler
- From the Departments of Urology, Pharmacology and Therapeutics, and Pathology, Roswell Park Cancer Institute, Buffalo, New York
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13
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Behl AS, Ellis LA, Pilon D, Xiao Y, Lefebvre P. Medication Adherence, Treatment Patterns, and Dose Reduction in Patients with Metastatic Castration-Resistant Prostate Cancer Receiving Abiraterone Acetate or Enzalutamide. AMERICAN HEALTH & DRUG BENEFITS 2017; 10:296-303. [PMID: 28975013 PMCID: PMC5620511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 06/20/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND The efficacy of and overall survival associated with metastatic castration-resistant prostate cancer (CRPC) treatments rely on patients' consistent adherence to the recommended dosage regimens. OBJECTIVES To evaluate treatment patterns and patient adherence to abiraterone acetate or enzalutamide therapy in real-world practice, and to examine the factors that may be associated with medication dose reduction in patients with metastatic CRPC. METHODS Retrospective analyses were conducted using the Truven Health MarketScan research databases among patients with metastatic CRPC who initiated treatment with abiraterone acetate or enzalutamide between October 1, 2012, and December 31, 2014 (index date). The patients were followed for up to 12 months, and their baseline characteristics were assessed during the 6 months before the index date. Medication adherence was measured at 3, 6, 9, and 12 months postindex using medication possession ratios (MPRs), and dose reduction was measured using refill gaps and relative dose intensity over the entire observation period. Kaplan-Meier survival analyses and Cox proportional hazards models were used to assess the association between the initial treatment and the risk for dose reduction. RESULTS The study included 2591 and 807 patients who initiated treatment with abiraterone acetate and enzalutamide, respectively. At 6, 9, and 12 months postindex, the patients who initiated abiraterone acetate had higher MPRs than the patients who initiated enzalutamide. In addition, the patients who initiated abiraterone acetate had lower Kaplan-Meier rates of dose reduction across 4 measurements for dose reduction. All hazard ratios for treatment (abiraterone acetate vs enzalutamide) were significantly lower than 1 (range, 0.57-0.80), indicating a lower risk for dose reduction associated with abiraterone acetate. CONCLUSION Patients who initiated abiraterone acetate therapy had higher medication adherence and lower risk for dose reduction than those who initiated enzalutamide therapy. Improved medication adherence may be associated with longer duration of treatment, which in turn may lead to better survival. Further research is needed to assess the potential effect of medication adherence on the overall survival of patients with metastatic CRPC.
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Affiliation(s)
- Ajay S Behl
- Director of US Oncology Economics and Outcomes Research, Janssen Scientific Affairs, Titusville, NJ
| | - Lorie A Ellis
- Director of US Rheumatology Economics and Outcomes Research, Janssen Scientific Affairs
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14
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Pilon D, Behl AS, Ellis LA, Emond B, Lefebvre P, Dawson NA. Duration of Treatment in Prostate Cancer Patients Treated with Abiraterone Acetate or Enzalutamide. J Manag Care Spec Pharm 2016; 23:225-235. [PMID: 28125362 PMCID: PMC10397959 DOI: 10.18553/jmcp.2016.16233] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Abiraterone acetate (AA) and enzalutamide (ENZ) are oral therapies offering survival benefit to metastatic castration-resistant prostate cancer (mCRPC) patients. Despite the availability of multiple treatment options for mCRPC, there is a lack of information on the effect that being initiated on AA or ENZ has on the combined prostate cancer treatment duration. OBJECTIVE To compare the combined duration of prostate cancer treatments of patients initiated on AA with that of patients initiated on ENZ. METHODS Truven Health MarketScan Research Databases from March 2012 to December 2014 were used to identify males with prostate cancer initiated on AA or ENZ (index therapy). Baseline characteristics were assessed during the 6 months pre-index. Inverse probability of treatment weights (IPTWs) were used to reduce baseline confounding. Treatment duration spanned from the index date to the earliest of treatment discontinuation (defined as a > 60-day gap in treatment), 24 months post-index, health plan disenrollment, or end of data. Weighted Kaplan-Meier and Cox proportional hazard models were used to compare the combined duration of mCRPC treatments (AA, ENZ, chemotherapy, sipuleucel-T, and radium 223) and any prostate cancer treatments (mCRPC, hormonal, and corticosteroid treatments) between patients initiated on either AA or ENZ. RESULTS A total of 2,591 patients initiated on AA and 807 patients initiated on ENZ were selected for the study. Patients' characteristics were generally well balanced after IPTW. At 3 months, patients initiated on AA were associated with fewer discontinuations of mCRPC treatments (hazard ratio [HR] = 0.73, P = 0.004) or of any prostate cancer treatments (HR = 0.61, P = 0.002), compared with patients initiated on ENZ. This result was maintained at 6, 9, 12, 18, and 24 months for mCRPC treatments (HR = 0.75, P < 0.001) and for any prostate cancer treatments (HR = 0.69, P < 0.001). Median duration of mCRPC treatments was 4.1 months longer for patients initiated on AA compared with those initiated on ENZ (18.3 vs. 14.2 months, P < 0.001) and similarly, the median duration of any prostate cancer treatment was longer for patients initiated on AA compared with those initiated on ENZ (not reached vs. 22.2 months, P < 0.001). CONCLUSIONS In this study, patients initiated on AA, compared with those initiated on ENZ, had a longer combined duration of mCRPC or prostate cancer treatments. DISCLOSURES This research was funded by Janssen Scientific Affairs. Pilon, Emond, and Lefebvre are employees of Analysis Group, a consulting company that has received research grants from Janssen Scientific Affairs. Behl and Ellis are employees of Janssen Scientific Affairs and stockholders in Johnson & Johnson. Dawson is on the speakers bureau for Janssen, Astellas, and Sanofi Aventis. Emond reports grants from Regeneron, Bristol-Myers Squibb, GlaxoSmithKline, Aegerion, Bayer, Novartis, Allergan, Millenium, and Genentech. Pilon reports grants from Novartis, GlaxoSmithKline, Pfizer, and Bayer. Lefebvre reports grants from GlaxoSmithKline, Novartis, Bayer, Medtronic, Noven, and Novo Nordisk. Study concept and design were contributed primarily by Pilon and Lefebvre, along with the other authors. Pilon, Emond, and Lefebre collected the data, and data interpretation was performed by Behl, Lefebvre, and Dawson, along with Pilon, Ellis, and Emond, The manuscript was written by Pilon, Emond, and Lefebvre and revised by Behl, Ellis, and Dawson.
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Affiliation(s)
| | - Ajay S Behl
- 2 Janssen Scientific Affairs, Horsham, Pennsylvania
| | | | - Bruno Emond
- 1 Groupe d'analyse, Ltée, Montréal, QC, Canada
| | | | - Nancy A Dawson
- 3 Georgetown University Lombardi Comprehensive Cancer Center, Washington DC
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Graça I, Pereira-Silva E, Henrique R, Packham G, Crabb SJ, Jerónimo C. Epigenetic modulators as therapeutic targets in prostate cancer. Clin Epigenetics 2016; 8:98. [PMID: 27651838 PMCID: PMC5025578 DOI: 10.1186/s13148-016-0264-8] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 09/07/2016] [Indexed: 01/24/2023] Open
Abstract
Prostate cancer is one of the most common non-cutaneous malignancies among men worldwide. Epigenetic aberrations, including changes in DNA methylation patterns and/or histone modifications, are key drivers of prostate carcinogenesis. These epigenetic defects might be due to deregulated function and/or expression of the epigenetic machinery, affecting the expression of several important genes. Remarkably, epigenetic modifications are reversible and numerous compounds that target the epigenetic enzymes and regulatory proteins were reported to be effective in cancer growth control. In fact, some of these drugs are already being tested in clinical trials. This review discusses the most important epigenetic alterations in prostate cancer, highlighting the role of epigenetic modulating compounds in pre-clinical and clinical trials as potential therapeutic agents for prostate cancer management.
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Affiliation(s)
- Inês Graça
- Cancer Biology and Epigenetics Group-Research Center (CI-IPOP), Portuguese Oncology Institute of Porto (IPO-Porto), Research Center-LAB 3, F Bdg, 1st floor, Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal ; School of Allied Health Sciences (ESTSP), Polytechnic of Porto, Porto, Portugal
| | - Eva Pereira-Silva
- Cancer Biology and Epigenetics Group-Research Center (CI-IPOP), Portuguese Oncology Institute of Porto (IPO-Porto), Research Center-LAB 3, F Bdg, 1st floor, Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal
| | - Rui Henrique
- Cancer Biology and Epigenetics Group-Research Center (CI-IPOP), Portuguese Oncology Institute of Porto (IPO-Porto), Research Center-LAB 3, F Bdg, 1st floor, Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal ; Department of Pathology, Portuguese Oncology Institute of Porto (IPO Porto), Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal ; Department of Pathology and Molecular Immunology, Institute of Biomedical Sciences Abel Salazar-University of Porto (ICBAS-UP), Porto, Portugal
| | - Graham Packham
- Cancer Research UK Centre, Cancer Sciences, The Somers Cancer Research Building, University of Southampton Faculty of Medicine, Southampton General Hospital, Southampton, S016 6YD UK
| | - Simon J Crabb
- Cancer Research UK Centre, Cancer Sciences, The Somers Cancer Research Building, University of Southampton Faculty of Medicine, Southampton General Hospital, Southampton, S016 6YD UK
| | - Carmen Jerónimo
- Cancer Biology and Epigenetics Group-Research Center (CI-IPOP), Portuguese Oncology Institute of Porto (IPO-Porto), Research Center-LAB 3, F Bdg, 1st floor, Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal ; Department of Pathology and Molecular Immunology, Institute of Biomedical Sciences Abel Salazar-University of Porto (ICBAS-UP), Porto, Portugal
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16
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Xia Y, Huang CC, Dittmar R, Du M, Wang Y, Liu H, Shenoy N, Wang L, Kohli M. Copy number variations in urine cell free DNA as biomarkers in advanced prostate cancer. Oncotarget 2016; 7:35818-35831. [PMID: 27127882 PMCID: PMC5094965 DOI: 10.18632/oncotarget.9027] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 04/16/2016] [Indexed: 01/14/2023] Open
Abstract
Genetic profiling of urine cell free DNA (cfDNA) has not been evaluated in advanced prostate cancer. We performed whole genome sequencing of urine cfDNAs to identify tumor-associated copy number variations in urine before and after initiating androgen deprivation therapy in HSPC stage and docetaxel chemotherapy in CRPC stage. A log2 ratio-based copy number analysis detected common genomic abnormalities in prostate cancer including AR amplification in 5/10 CRPC patients. Other abnormalities identified included TMPRSS2-ERG fusion, PTEN gene deletion, NOTCH1 locus amplification along with genomic amplifications at 8q24.3, 9q34.3, 11p15.5 and 14q11.2, and deletions at 4q35.2, 5q31.3, 7q36.3, 12q24.33, and 16p11.2. By comparing copy number between pre- and post-treatment, we found significant copy number changes in 34 genomic loci. To estimate the somatic tumor DNA fraction in urine cfDNAs, we developed a Urine Genomic Abnormality (UGA) score algorithm that summed the top ten most significant segments with copy number changes. The UGA scores correlated with tumor burden and the change in UGA score after stage-specific therapies reflected disease progression status and overall survival. The study demonstrates the potential clinical utility of urine cfDNAs in predicting treatment response and monitoring disease progression.
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Affiliation(s)
- Yun Xia
- Department of General Surgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Department of Pathology and MCW Cancer Center, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Chiang-Ching Huang
- Joseph J. Zilber School of Public Health, University of Wisconsin, Milwaukee, WI, USA
| | - Rachel Dittmar
- Department of Pathology and MCW Cancer Center, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Meijun Du
- Department of Pathology and MCW Cancer Center, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Yuan Wang
- Department of Pathology and MCW Cancer Center, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Hongyan Liu
- Department of Pathology and MCW Cancer Center, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Niraj Shenoy
- Division of Medical Oncology, Department of Oncology, Mayo Clinic, Rochester, MN, USA
| | - Liang Wang
- Department of Pathology and MCW Cancer Center, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Manish Kohli
- Division of Medical Oncology, Department of Oncology, Mayo Clinic, Rochester, MN, USA
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17
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Xia S, Kohli M, Du M, Dittmar RL, Lee A, Nandy D, Yuan T, Guo Y, Wang Y, Tschannen MR, Worthey E, Jacob H, See W, Kilari D, Wang X, Hovey RL, Huang CC, Wang L. Plasma genetic and genomic abnormalities predict treatment response and clinical outcome in advanced prostate cancer. Oncotarget 2016; 6:16411-21. [PMID: 25915538 PMCID: PMC4599278 DOI: 10.18632/oncotarget.3845] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Accepted: 03/20/2015] [Indexed: 12/20/2022] Open
Abstract
Liquid biopsies, examinations of tumor components in body fluids, have shown promise for predicting clinical outcomes. To evaluate tumor-associated genomic and genetic variations in plasma cell-free DNA (cfDNA) and their associations with treatment response and overall survival, we applied whole genome and targeted sequencing to examine the plasma cfDNAs derived from 20 patients with advanced prostate cancer. Sequencing-based genomic abnormality analysis revealed locus-specific gains or losses that were common in prostate cancer, such as 8q gains, AR amplifications, PTEN losses and TMPRSS2-ERG fusions. To estimate tumor burden in cfDNA, we developed a Plasma Genomic Abnormality (PGA) score by summing the most significant copy number variations. Cox regression analysis showed that PGA scores were significantly associated with overall survival (p < 0.04). After androgen deprivation therapy or chemotherapy, targeted sequencing showed significant mutational profile changes in genes involved in androgen biosynthesis, AR activation, DNA repair, and chemotherapy resistance. These changes may reflect the dynamic evolution of heterozygous tumor populations in response to these treatments. These results strongly support the feasibility of using non-invasive liquid biopsies as potential tools to study biological mechanisms underlying therapy-specific resistance and to predict disease progression in advanced prostate cancer.
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Affiliation(s)
- Shu Xia
- Department of Oncology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Department of Pathology and MCW Cancer Center, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Manish Kohli
- Department of Medical Oncology, Mayo Clinic, Rochester, MN, USA
| | - Meijun Du
- Department of Pathology and MCW Cancer Center, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Rachel L Dittmar
- Department of Pathology and MCW Cancer Center, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Adam Lee
- Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester, MN, USA
| | - Debashis Nandy
- Department of Medical Oncology, Mayo Clinic, Rochester, MN, USA
| | - Tiezheng Yuan
- Department of Pathology and MCW Cancer Center, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Yongchen Guo
- Department of Pathology and MCW Cancer Center, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Yuan Wang
- Department of Pathology and MCW Cancer Center, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Michael R Tschannen
- Human Molecular Genetics Center, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Elizabeth Worthey
- Human Molecular Genetics Center, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Howard Jacob
- Human Molecular Genetics Center, Medical College of Wisconsin, Milwaukee, WI, USA
| | - William See
- Department of Urology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Deepak Kilari
- Department of Urology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Xuexia Wang
- Joseph J. Zilber School of Public Health, University of Wisconsin, Milwaukee, WI, USA
| | - Raymond L Hovey
- Great Lakes Genomics Center, School of Freshwater Sciences, University of Wisconsin, Milwaukee, WI, USA
| | - Chiang-Ching Huang
- Joseph J. Zilber School of Public Health, University of Wisconsin, Milwaukee, WI, USA
| | - Liang Wang
- Department of Pathology and MCW Cancer Center, Medical College of Wisconsin, Milwaukee, WI, USA
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18
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Kelly RS, Vander Heiden MG, Giovannucci E, Mucci LA. Metabolomic Biomarkers of Prostate Cancer: Prediction, Diagnosis, Progression, Prognosis, and Recurrence. Cancer Epidemiol Biomarkers Prev 2016; 25:887-906. [PMID: 27197278 DOI: 10.1158/1055-9965.epi-15-1223] [Citation(s) in RCA: 90] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 03/23/2016] [Indexed: 02/07/2023] Open
Abstract
Metabolite profiling is being increasing employed in the study of prostate cancer as a means of identifying predictive, diagnostic, and prognostic biomarkers. This review provides a summary and critique of the current literature. Thirty-three human case-control studies of prostate cancer exploring disease prediction, diagnosis, progression, or treatment response were identified. All but one demonstrated the ability of metabolite profiling to distinguish cancer from benign, tumor aggressiveness, cases who recurred, and those who responded well to therapy. In the subset of studies where biomarker discriminatory ability was quantified, high AUCs were reported that would potentially outperform the current gold standards in diagnosis, prognosis, and disease recurrence, including PSA testing. There were substantial similarities between the metabolites and the associated pathways reported as significant by independent studies, and important roles for abnormal cell growth, intensive cell proliferation, and dysregulation of lipid metabolism were highlighted. The weight of the evidence therefore suggests metabolic alterations specific to prostate carcinogenesis and progression that may represent potential metabolic biomarkers. However, replication and validation of the most promising biomarkers is currently lacking and a number of outstanding methodologic issues remain to be addressed to maximize the utility of metabolomics in the study of prostate cancer. Cancer Epidemiol Biomarkers Prev; 25(6); 887-906. ©2016 AACR.
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Affiliation(s)
- Rachel S Kelly
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts. Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts.
| | - Matthew G Vander Heiden
- Koch Institute for Integrative Cancer Research at Massachusetts Institute of Technology, Cambridge, Massachusetts. Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts. Broad Institute of Harvard and Massachusetts Institute of Technology, Cambridge, Massachusetts
| | - Edward Giovannucci
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts. Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts. Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Lorelei A Mucci
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts. Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
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19
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Sun SB, Liu P, Shao FM, Miao QL. Formulation and evaluation of PLGA nanoparticles loaded capecitabine for prostate cancer. Int J Clin Exp Med 2015; 8:19670-19681. [PMID: 26770631 PMCID: PMC4694531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 10/04/2015] [Indexed: 06/05/2023]
Abstract
The objective of this work is to prepare and evaluate Poly (D, L-Lactide-co-glycolide) (PLGA) Nanoparticles (NPs) of Capecitabine, an anticancer agent loaded by solvent displacement method using stabilizer (poly vinyl alcohol). The prepared NPs were characterized by FT-IR, DSC, drug loading, entrapment efficiency, particle size, surface morphology by Atomic force microscopy (AFM), X-ray diffraction and in-vitro studies. FT-IR and DSC studies indicated that there was no interaction between the drug and polymer. The morphological studies performed by AFM showed uniform and spherical shaped discrete particles without aggregation and smooth in surface morphology with a nano size range of 144 nm. X-ray diffraction was performed to reveal the crystalline nature of the drug after encapsulation. The NPs formed were spherical in shape with zeta potentials (-14.8 mV). In vitro release studies were carried and showed drug release up to 5 days. The drug release followed zero order kinetics and a Fickian transport mechanism. Nanoparticles obtained a high encapsulation efficiency of 88.4% and drug loading of 16.98%. Drug released from Capecitabine loaded PLGA NPs (84.1%) was for 5 days. It is concluded from the present investigation that PLGA NPs of Capecitabine may effectively deliver the drug to the prostate for the treatment of prostate cancer.
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Affiliation(s)
- Shu-Ben Sun
- Department of Urology Surgery, The Affiliated Hospital of Medical College, Ningbo University 315020, P. R. China
| | - Ping Liu
- Department of Urology Surgery, The Affiliated Hospital of Medical College, Ningbo University 315020, P. R. China
| | - Fa-Ming Shao
- Department of Urology Surgery, The Affiliated Hospital of Medical College, Ningbo University 315020, P. R. China
| | - Qi-Long Miao
- Department of Urology Surgery, The Affiliated Hospital of Medical College, Ningbo University 315020, P. R. China
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20
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Ellis LA, Lafeuille MH, Gozalo L, Pilon D, Lefebvre P, McKenzie S. Treatment Sequences and Pharmacy Costs of 2 New Therapies for Metastatic Castration-Resistant Prostate Cancer. AMERICAN HEALTH & DRUG BENEFITS 2015; 8:185-195. [PMID: 26157540 PMCID: PMC4489187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Accepted: 05/14/2015] [Indexed: 06/04/2023]
Abstract
BACKGROUND The approval of new therapies for metastatic castration-resistant prostate cancer (mCRPC), including the oral agents abiraterone acetate and enzalutamide, has altered the standard of care for patients with mCRPC. Little information exists regarding the sequences in which new therapies for mCRPC with evidence of survival benefits are used. OBJECTIVE To describe the sequence of medication use for patients with mCRPC as observed in 3 healthcare data sets. METHODS Three healthcare claims data sets were used to identify patients with mCRPC who had no previous use of and were newly initiating 1 of the 2 oral study drugs (ie, abiraterone acetate or enzalutamide). The index date was the first study drug claim after September 1, 2012. Patients were followed until the data cutoff or until being lost to follow-up. Descriptive statistics summarized the proportion of patients receiving 1 line of therapy versus ≥2 lines of therapy. The use of a corticosteroid and the mean monthly pharmacy costs of abiraterone acetate or enzalutamide during the follow-up period were compared between the cohorts. RESULTS A total of 3525 patients with mCRPC were identified from data set 1, 499 patients from data set 2, and 1949 patients from data set 3. The first-line use of abiraterone acetate was observed in 74%, 82%, and 80% of data sets 1, 2, and 3, respectively, and the first-line use of enzalutamide was seen in 26%, 18%, and 20%, respectively, of these same populations. The concomitant use of corticosteroids was observed in patients receiving first-line abiraterone acetate and in patients receiving first-line enzalutamide in all 3 data sets. After September 2012, abiraterone acetate was the most frequently administered therapy for mCRPC among the 2 oral agents, abiraterone acetate and enzalutamide. The monthly pharmacy costs associated with abiraterone acetate were significantly lower than those associated with enzalutamide in all 3 data sets. CONCLUSIONS Based on the data used in this study, abiraterone acetate was more frequently administered for patients with mCRPC than enzalutamide. The concomitant use of corticosteroids was common in patients receiving first-line abiraterone acetate or first-line enzalutamide therapy. Patients receiving abiraterone acetate had significantly lower monthly pharmacy costs than patients receiving enzalutamide. These findings may facilitate the estimation of the budgetary impact of a treatment mix for population health and for managed care stakeholders.
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Affiliation(s)
- Lorie A Ellis
- Associate Director, Health Economics and Outcomes Research, Janssen Scientific Affairs, Horsham, PA
| | | | | | - Dominic Pilon
- Economist, Groupe d'analyse, Ltée, Montréal, Québec, Canada
| | - Patrick Lefebvre
- Vice President, Groupe d'analyse, Ltée, Montréal, Québec, Canada
| | - Scott McKenzie
- Senior Director, Health Economics and Outcomes Research, Janssen Scientific Affairs, Horsham, PA
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Yu P, Ye L, Wang H, Du G, Zhang J, Zuo Y, Zhang J, Tian J. NSK-01105, a novel sorafenib derivative, inhibits human prostate tumor growth via suppression of VEGFR2/EGFR-mediated angiogenesis. PLoS One 2014; 9:e115041. [PMID: 25551444 PMCID: PMC4281216 DOI: 10.1371/journal.pone.0115041] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Accepted: 11/17/2014] [Indexed: 11/19/2022] Open
Abstract
The purpose of this study is to investigate the anti-angiogenic activities of NSK-01105, a novel sorafenib derivative, in in vitro, ex vivo and in vivo models, and explore the potential mechanisms. NSK-01105 significantly inhibited vascular endothelial growth factor (VEGF)-induced migration and tube formation of human umbilical vein endothelial cells at non-cytotoxic concentrations as shown by wound-healing, transwell migration and endothelial cell tube formation assays, respectively. Cell viability and invasion of LNCaP and PC-3 cells were significantly inhibited by cytotoxicity assay and matrigel invasion assay. Furthermore, NSK-01105 also inhibited ex vivo angiogenesis in matrigel plug assay. Western blot analysis showed that NSK-01105 down-regulated VEGF-induced phosphorylation of VEGF receptor 2 (VEGFR2) and the activation of epidermal growth factor receptor (EGFR). Tumor volumes were significantly reduced by NSK-01105 at 60 mg/kg/day in both xenograft models. Immunohistochemical staining demonstrated a close association between inhibition of tumor growth and neovascularization. Collectively, our results suggest a role of NSK-01105 in treatment for human prostate tumors, and one of the potential mechanisms may be attributed to anti-angiogenic activities.
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Affiliation(s)
- Pengfei Yu
- School of Life Science and Bio-pharmaceutics, Shenyang Pharmaceutical University, Shenyang, Liaoning 110016, China
| | - Liang Ye
- State Key Laboratory of Long-acting and Targeting Drug Delivery System, Non-clinical Research Department, Luye Pharma Group Ltd., Yantai, Shandong 264003, China
- School of Pharmaceutical Sciences and Institute of Material Medical, Binzhou Medical University, Yantai, Shandong 264005, China
| | - Hongbo Wang
- State Key Laboratory of Long-acting and Targeting Drug Delivery System, Non-clinical Research Department, Luye Pharma Group Ltd., Yantai, Shandong 264003, China
- School of Pharmacy, Yantai University, Yantai, Shandong 264005, China
| | - Guangying Du
- State Key Laboratory of Long-acting and Targeting Drug Delivery System, Non-clinical Research Department, Luye Pharma Group Ltd., Yantai, Shandong 264003, China
- School of Pharmacy, Yantai University, Yantai, Shandong 264005, China
| | - Jianzhao Zhang
- State Key Laboratory of Long-acting and Targeting Drug Delivery System, Non-clinical Research Department, Luye Pharma Group Ltd., Yantai, Shandong 264003, China
| | - Yanhua Zuo
- Affiliated Hospital of Medical College of Qingdao University, Qingdao, Shandong 266001, China
| | - Jinghai Zhang
- School of Life Science and Bio-pharmaceutics, Shenyang Pharmaceutical University, Shenyang, Liaoning 110016, China
- * E-mail: (JZ); (JT)
| | - Jingwei Tian
- State Key Laboratory of Long-acting and Targeting Drug Delivery System, Non-clinical Research Department, Luye Pharma Group Ltd., Yantai, Shandong 264003, China
- School of Pharmacy, Yantai University, Yantai, Shandong 264005, China
- * E-mail: (JZ); (JT)
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22
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HUANG ZHENGHUA, ZHENG HONGFANG, WANG WEILU, WANG YONG, ZHONG LONGFEI, WU JIULONG, LI QIAOXING. Berberine targets epidermal growth factor receptor signaling to suppress prostate cancer proliferation in vitro. Mol Med Rep 2014; 11:2125-8. [DOI: 10.3892/mmr.2014.2929] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Accepted: 05/23/2014] [Indexed: 11/06/2022] Open
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23
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Lei YY, Wang WJ, Mei JH, Wang CL. Mitogen-Activated Protein Kinase Signal Transduction in Solid Tumors. Asian Pac J Cancer Prev 2014; 15:8539-48. [DOI: 10.7314/apjcp.2014.15.20.8539] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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24
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Asadi H, Orangi M, Shanehbandi D, Babaloo Z, Delazar A, Mohammadnejad L, Zare Shahneh F, Valiyari S, Baradaran B. Methanolic Fractions of Ornithogalum cuspidatum Induce Apoptosis in PC-3 Prostate Cancer Cell Line and WEHI-164 Fibrosarcoma Cancer Cell Line. Adv Pharm Bull 2014; 4:455-8. [PMID: 25364662 DOI: 10.5681/apb.2014.067] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Revised: 04/20/2014] [Accepted: 04/20/2014] [Indexed: 01/15/2023] Open
Abstract
PURPOSE The present study, was aimed to assess the cytotoxic effects of Ornithogalum cuspidatum methanolic fractions on PC-3, prostate cancer cells and WEHI-164, Fibrosarcoma cells. METHODS Methanolic fractions of O. cuspidatum were prepared using solid phase extraction and the cells were treated with different concentrations for 12 and 24 hours. Cytotoxicity and cell viability were measured by MTT assay. ELISA was also employed to assess the histone-associated DNA fragments and the involvement of apoptotic mechanisms. RESULTS 10 and 20% fractions had not significant cytotoxic effects (p>0.05) but other fractions exerted growth inhibition on both cancer cell lines (p<0.05). After 24h of incubation with 40, 60, 80 and 100% fractions, the IC50 values were: 165, 85, 65 and 45μg/ml on PC-3 cells and 200, 96, 76 and 73μg/ml against WEHI-164 cell line, respectively. ELISA results also revealed that, both cell lines had undergone apoptosis. CONCLUSION It is deduced that, 80% and 100% methanolic fractions had significant anti-proliferative and apoptotic impacts on PC-3 and WEHI-164 cells in vitro and could be considered for developing chemo-preventive substances.
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Affiliation(s)
- Hamed Asadi
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mona Orangi
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Dariush Shanehbandi
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Zohreh Babaloo
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Abbas Delazar
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Leila Mohammadnejad
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Samira Valiyari
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Behzad Baradaran
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran. ; Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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Graça I, Sousa EJ, Costa-Pinheiro P, Vieira FQ, Torres-Ferreira J, Martins MG, Henrique R, Jerónimo C. Anti-neoplastic properties of hydralazine in prostate cancer. Oncotarget 2014; 5:5950-64. [PMID: 24797896 PMCID: PMC4171604 DOI: 10.18632/oncotarget.1909] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Accepted: 04/16/2014] [Indexed: 12/12/2022] Open
Abstract
Prostate cancer (PCa) is a major cause of cancer-related morbidity and mortality worldwide. Although early disease is often efficiently managed therapeutically, available options for advanced disease are mostly ineffective. Aberrant DNA methylation associated with gene-silencing of cancer-related genes is a common feature of PCa. Therefore, DNA methylation inhibitors might constitute an attractive alternative therapy. Herein, we evaluated the anti-cancer properties of hydralazine, a non-nucleoside DNA methyltransferases (DNMT) inhibitor, in PCa cell lines. In vitro assays showed that hydralazine exposure led to a significant dose and time dependent growth inhibition, increased apoptotic rate and decreased invasiveness. Furthermore, it also induced cell cycle arrest and DNA damage. These phenotypic effects were particularly prominent in DU145 cells. Following hydralazine exposure, decreased levels of DNMT1, DNMT3a and DNMT3b mRNA and DNMT1 protein were depicted. Moreover, a significant decrease in GSTP1, BCL2 and CCND2 promoter methylation levels, with concomitant transcript re-expression, was also observed. Interestingly, hydralazine restored androgen receptor expression, with upregulation of its target p21 in DU145 cell line. Protein array analysis suggested that blockage of EGF receptor signaling pathway is likely to be the main mechanism of hydralazine action in DU145 cells. Our data demonstrate that hydralazine attenuated the malignant phenotype of PCa cells, and might constitute a useful therapeutic tool.
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Affiliation(s)
- Inês Graça
- Cancer Biology & Epigenetics Group, Research Center of the Portuguese Oncology Institute-Porto
- Departments of School of Allied Health Sciences ESTSP, Polytechnic of Porto
| | - Elsa J Sousa
- Cancer Biology & Epigenetics Group, Research Center of the Portuguese Oncology Institute-Porto
| | - Pedro Costa-Pinheiro
- Cancer Biology & Epigenetics Group, Research Center of the Portuguese Oncology Institute-Porto
| | - Filipa Q Vieira
- Cancer Biology & Epigenetics Group, Research Center of the Portuguese Oncology Institute-Porto
- Departments of School of Allied Health Sciences ESTSP, Polytechnic of Porto
| | - Jorge Torres-Ferreira
- Cancer Biology & Epigenetics Group, Research Center of the Portuguese Oncology Institute-Porto
- Department of Pathology, Portuguese Oncology Institute-Porto
| | - Maria Gabriela Martins
- Department of Hematology - Laboratory of Flow Cytometry, Portuguese Oncology Institute-Porto
| | - Rui Henrique
- Cancer Biology & Epigenetics Group, Research Center of the Portuguese Oncology Institute-Porto
- Department of Pathology, Portuguese Oncology Institute-Porto
- Department of Pathology and Molecular Immunology, Institute of Biomedical Sciences Abel Salazar, University of Porto
| | - Carmen Jerónimo
- Cancer Biology & Epigenetics Group, Research Center of the Portuguese Oncology Institute-Porto
- Department of Pathology and Molecular Immunology, Institute of Biomedical Sciences Abel Salazar, University of Porto
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Qin R, Kohli M. Pharmacogenetics- and pharmacogenomics-based rational clinical trial designs in oncology. Per Med 2013; 10:859-869. [PMID: 29776282 DOI: 10.2217/pme.13.78] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The rapid evolution of molecular technologies that can identify genetic markers and lead to dissecting the inherent variance of individual cancer biology has had a tangible impact on trial designs in oncology. Rational trial designs based on molecular marker expression coupled with drug–marker interactions have started to be adopted, challenging the previous paradigms of morphology-based, single-arm efficacy studies. This review summarizes novel trials being developed based on molecular predictive factor therapeutics and the potential impact these novel trial designs will have on the practice of oncology in future. A variety of clinical trial designs based on tumor and drug–host genetic interactions are discussed and the example of advanced prostate cancer is used to illustrate the changing landscape of clinical trial designs in cancer.
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Affiliation(s)
- Rui Qin
- Department of Health Sciences Research, Mayo Clinic, 200 First Street South West, Rochester, MN 55905, USA
| | - Manish Kohli
- Department of Oncology, Mayo Clinic, 200 First Street South West, Rochester, MN 55905, USA
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Sette C. Alternative splicing programs in prostate cancer. Int J Cell Biol 2013; 2013:458727. [PMID: 23983695 PMCID: PMC3747374 DOI: 10.1155/2013/458727] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Accepted: 07/11/2013] [Indexed: 12/31/2022] Open
Abstract
Prostate cancer (PCa) remains one of the most frequent causes of death for cancer in the male population. Although the initial antiandrogenic therapies are efficacious, PCa often evolves into a hormone-resistant, incurable disease. The genetic and phenotypic heterogeneity of this type of cancer renders its diagnosis and cure particularly challenging. Mounting evidence indicates that alternative splicing, the process that allows production of multiple mRNA variants from each gene, contributes to the heterogeneity of the disease. Key genes for the biology of normal and neoplastic prostate cells, such as those encoding for the androgen receptor and cyclin D1, are alternatively spliced to yield protein isoforms with different or even opposing functions. This review illustrates some examples of genes whose alternative splicing regulation is relevant to PCa biology and discusses the possibility to exploit alternative splicing regulation as a novel tool for prognosis, diagnosis, and therapeutic approaches to PCa.
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Affiliation(s)
- Claudio Sette
- Department of Biomedicine and Prevention, University of Rome “Tor Vergata,” 00133 Rome, Italy
- Laboratory of Neuroembryology, Fondazione Santa Lucia IRCCS, 00143 Rome, Italy
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Goyal J, Antonarakis ES. Clinical Evaluation of Abiraterone in the Treatment of Metastatic Prostate Cancer. ACTA ACUST UNITED AC 2013; 2013:1-14. [PMID: 24482578 PMCID: PMC3904375 DOI: 10.4137/cmu.s8337] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Treatment of castration-resistant prostate cancer remains an area of unmet medical need. Evidence suggests that this entity continues to be driven by androgens and androgen receptor (AR) signaling. Abiraterone acetate, a pregnenolone derivative, is an oral selective and irreversible inhibitor of the key steroidogenic enzyme CYP17. It possesses dual 17-α hydroxylase and C17,20-lyase blocking activity, the result of which is decreased gonadal and extra-gonadal androgen synthesis. Abiraterone was first approved by the US Food and Drug Administration (FDA) in 2011 following the demonstration of superior survival compared with placebo in the post-docetaxel population. Since that time, more evidence has been generated from preclinical studies and clinical trials which have considerably enhanced our understanding of this complex disease. In this paper, we review the development of abiraterone acetate, its pharmacological characteristics, and its effects on the androgen-AR signaling axis, along with the combined experience from clinical trials. We also discuss some of the ongoing trials using this agent, as well as potential mechanisms of abiraterone resistance, novel bio-marker development, and future directions using AR-directed therapies.
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Affiliation(s)
- Jatinder Goyal
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL
| | - Emmanuel S Antonarakis
- Assistant Professor of Oncology, Johns Hopkins Sidney Kimmel Comprehensive Cancer Center, Baltimore MD
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Lafeuille MH, Gravel J, Grittner A, Lefebvre P, Ellis L, McKenzie RS. Real-World Corticosteroid Utilization Patterns in Patients with Metastatic Castration-Resistant Prostate Cancer in 2 Large US Administrative Claims Databases. AMERICAN HEALTH & DRUG BENEFITS 2013; 6:307-316. [PMID: 24991366 PMCID: PMC4031721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND Prostate cancer is the most common noncutaneous malignancy in men in the United States. Patients with metastatic castration-resistant prostate cancer (mCRPC) may be treated with secondary hormonal therapy or with chemotherapy, and potentially with concomitant corticosteroids. Corticosteroids can help manage the side effects of chemotherapy and secondary hormonal therapy and ameliorate prostate cancer-related symptoms, although corticosteroids are also associated with adverse effects. With an increasing number of available treatment options for mCRPC, evaluating the real-world concomitant use of corticosteroids in this patient population is important. OBJECTIVE To evaluate the utilization patterns of corticosteroids for the treatment of patients with mCRPC based on real-world data from 2 large claim databases. METHODS This retrospective analysis included medical and pharmacy claims from 2 large publicly available healthcare claims databases covering more than 31 million individuals to identify treatment patterns in adult patients with mCRPC. A total of 2593 patients with mCRPC were identified in data set 1 and 626 patients in data set 2 between 2005 and 2011. The appropriate treatment for castration-resistant prostate cancer (CRPC) was defined as chemotherapy, an antiandrogen, an adrenal androgen blocker, or estrogen. The index date was the date of the first CRPC treatment or the first metastasis diagnosis, whichever occurred later. The observation period spanned from the index date to the end of health insurance eligibility. Study end points included population characteristics, the distribution of mCRPC therapies, and corticosteroid utilization patterns. RESULTS The study population came from the 2 data sets and included 3219 men who were treated for mCRPC. Bone and lymph nodes were the predominant metastatic sites. Bicalutamide was the most common secondary hormonal therapy, and docetaxel was the most common chemotherapy used for these patients. Overall, 73.4% of the patients in data set 1 received concomitant corticosteroids, as did 71.6% of patients in population 2 during the entire period from the index date to the end of eligibility date. In addition, 62.8% and 60.4% of patients, respectively, received concomitant corticosteroids during the secondary hormonal therapy period, and 93.8% and 95.1% of patients, respectively, received concomitant corticosteroids during the chemotherapy period. Similar patterns of corticosteroid use were observed across geographic areas of the United States. CONCLUSION This study shows consistently similar utilization patterns of corticosteroids in patients with mCRPC in 2 large national databases. Using real-world data to inform concomitant corticosteroid use in the treatment of patients with mCRPC may assist healthcare providers with treatment selection and with sequencing decision. Future research is warranted to investigate evolving treatment options for patients with mCRPC.
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Affiliation(s)
| | - Jonathan Gravel
- Mr Gravel is Economist, Groupe d'Analyse, Ltée, Montreal, Quebec, Canada
| | - Amanda Grittner
- Ms Grittner is Economist, Groupe d'Analyse, Ltée, Montreal, Quebec, Canada
| | - Patrick Lefebvre
- Mr Lefebvre is Vice President, Groupe d'Analyse, Ltée, Montreal, Quebec, Canada
| | - Lorie Ellis
- Dr Ellis is Associate Director, Janssen Scientific Affairs, Titusville, NJ
| | - R Scott McKenzie
- Dr McKenzie is Senior Director, Janssen Scientific Affairs, Titusville, NJ
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Scott G, Ahmad I, Howard K, MacLean D, Oliva C, Warrington S, Wilbraham D, Worthington P. Double-blind, randomized, placebo-controlled study of safety, tolerability, pharmacokinetics and pharmacodynamics of TAK-683, an investigational metastin analogue in healthy men. Br J Clin Pharmacol 2013; 75:381-91. [PMID: 22803642 DOI: 10.1111/j.1365-2125.2012.04385.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2011] [Accepted: 05/31/2012] [Indexed: 11/28/2022] Open
Abstract
AIMS Two randomized, double-blind, placebo-controlled studies were performed to characterize the safety, tolerability, pharmacokinetics (PK) and pharmacodynamics (PD) of the investigational metastin analogue, TAK-683, in healthy men. METHODS We first investigated a single subcutaneous (s.c.) dose of TAK-683 (0.01-2.0 mg) in 60 subjects (TAK-683, n = 42; placebo, n = 18). We then assessed a single s.c. bolus of 0.03-1.0 mg TAK-683 on day 1, followed by a 0.01-2.0 mg day(-1) continuous infusion on days 2-13, to simulate a depot formulation, in 30 subjects (TAK-683, n = 25; placebo, n = 5) for 14 days. RESULTS TAK-683 was well tolerated up to a dose of 2.0 mg day(-1) by continuous s.c. infusion for 14 days. Adverse events were similar between TAK-683 and placebo subjects at all dose levels. TAK-683 plasma concentrations generally increased in proportion to dose with single and continuous dosing, with steady-state concentrations achieved by day 2 of continuous dosing. TAK-683 at 2.0 mg day(-1) suppressed testosterone below castration level (<50 ng dl(-1)) in four of five subjects by day 7 of continuous dosing. Luteinizing hormone and follicle stimulating hormone concentrations were suppressed with TAK-683 continuous dosing compared with placebo by up to 70 and 43%, respectively, but this was not consistently dose-dependent. CONCLUSIONS In healthy men, s.c. administration of TAK-683 was well tolerated at all dose levels. The PK profile of TAK-683 was favourable, and TAK-683 suppressed testosterone profoundly during continuous dosing. Further investigation of metastin analogues is warranted for the treatment of castration-resistant prostate cancer.
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Affiliation(s)
- Graham Scott
- Takeda Global Research & Development Centre (Europe) Ltd, London, UK.
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31
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Watahiki A, Macfarlane RJ, Gleave ME, Crea F, Wang Y, Helgason CD, Chi KN. Plasma miRNAs as biomarkers to identify patients with castration-resistant metastatic prostate cancer. Int J Mol Sci 2013; 14:7757-70. [PMID: 23574937 PMCID: PMC3645714 DOI: 10.3390/ijms14047757] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2013] [Revised: 03/20/2013] [Accepted: 03/22/2013] [Indexed: 01/14/2023] Open
Abstract
MicroRNAs (miRNAs) have emerged as key regulators of numerous biological processes, and increasing evidence suggests that circulating miRNAs may be useful biomarkers of clinical disease. In this study, we sought to identify plasma miRNAs that differentiate patients with metastatic castration resistant prostate cancer (mCRPC) from those with localized prostate cancer (PCa). Pooled plasma samples from patients with localized PCa or mCRPC (25 per group) were assayed using the Exiqon miRNA qPCR panel, and the differential expression of selected candidates was validated using qRT-PCR. We identified 63 miRNAs upregulated in mCRPC versus localized PCa, while only four were downregulated. Pearson’s correlation analysis revealed two highly correlated groups: one consisting of miR-141, miR375 and miR-200c and the other including miR151-3p, miR423-3p, miR-126, miR152 and miR-21. A third group, containing miR-16 and miR-205, showed less correlation. One miRNA from each group (miR-141, miR151-3p and miR-16) was used for logistic regression analysis and proved to increase the sensitivity of the prostate-specific antigen (PSA) test alone. While no miRNA alone differentiated localized PCa and mCRPC, combinations had greater sensitivity and specificity. The expression of these 10 candidates was assayed for association with clinical parameters of disease progression through the cBio portal. Our results demonstrate that plasma levels of selected miRNAs are potential biomarkers to differentiate localized PCa and mCRPC.
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Affiliation(s)
- Akira Watahiki
- The Vancouver Prostate Centre, Vancouver General Hospital, Vancouver, BC V6H 3Z6, Canada; E-Mails: (A.W.); (M.E.G.); (K.N.C.)
- Departments of Experimental Therapeutics, Vancouver, BC V5Z 1L3, Canada; E-Mail:
| | - Robyn J. Macfarlane
- Departments of Medical Oncology, BC Cancer Agency, Vancouver, BC V5Z 4E6, Canada; E-Mail:
| | - Martin E. Gleave
- The Vancouver Prostate Centre, Vancouver General Hospital, Vancouver, BC V6H 3Z6, Canada; E-Mails: (A.W.); (M.E.G.); (K.N.C.)
- Departments of Urologic Sciences, Faculty of Medicine, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Francesco Crea
- Departments of Experimental Therapeutics, Vancouver, BC V5Z 1L3, Canada; E-Mail:
| | - Yuzhuo Wang
- The Vancouver Prostate Centre, Vancouver General Hospital, Vancouver, BC V6H 3Z6, Canada; E-Mails: (A.W.); (M.E.G.); (K.N.C.)
- Departments of Experimental Therapeutics, Vancouver, BC V5Z 1L3, Canada; E-Mail:
- Departments of Urologic Sciences, Faculty of Medicine, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
- Authors to whom correspondence should be addressed; E-Mails: (Y.W.); (C.D.H.); Tel.: +1-604-675-8013 (Y.W.); +1-604-675-8011 (C.D.H.); Fax: +1-604-675-8019 (Y.W. & C.D.H.)
| | - Cheryl D. Helgason
- Departments of Experimental Therapeutics, Vancouver, BC V5Z 1L3, Canada; E-Mail:
- Department of Surgery, Faculty of Medicine, University of British Columbia, Vancouver, BC V5Z 4E3, Canada
- Authors to whom correspondence should be addressed; E-Mails: (Y.W.); (C.D.H.); Tel.: +1-604-675-8013 (Y.W.); +1-604-675-8011 (C.D.H.); Fax: +1-604-675-8019 (Y.W. & C.D.H.)
| | - Kim N. Chi
- The Vancouver Prostate Centre, Vancouver General Hospital, Vancouver, BC V6H 3Z6, Canada; E-Mails: (A.W.); (M.E.G.); (K.N.C.)
- Departments of Experimental Therapeutics, Vancouver, BC V5Z 1L3, Canada; E-Mail:
- Department of Surgery, Faculty of Medicine, University of British Columbia, Vancouver, BC V5Z 4E3, Canada
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Fiandalo MV, Wu W, Mohler JL. The role of intracrine androgen metabolism, androgen receptor and apoptosis in the survival and recurrence of prostate cancer during androgen deprivation therapy. Curr Drug Targets 2013; 14:420-40. [PMID: 23565755 PMCID: PMC3991464 DOI: 10.2174/1389450111314040004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Revised: 02/21/2013] [Accepted: 02/22/2013] [Indexed: 11/22/2022]
Abstract
Prostate cancer (CaP) is the most frequently diagnosed cancer and leading cause of cancer death in American men. Almost all men present with advanced CaP and some men who fail potentially curative therapy are treated with androgen deprivation therapy (ADT). ADT is not curative and CaP recurs as the lethal phenotype. The goal of this review is to apply our current understanding of CaP and castration-recurrent CaP (CR-CaP) to earlier studies that characterized ADT and the molecular mechanisms that facilitate the transition from androgen-stimulated CaP to CR-CaP. Reexamination of earlier studies also may provide a better understanding of how more newly recognized mechanisms, such as intracrine metabolism, may be involved with the early events that allow CaP survival after initiation of ADT and subsequent development of CR-CaP.
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Affiliation(s)
- Michael V. Fiandalo
- Department of Urology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
| | - Wenjie Wu
- Department of Urology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
| | - James L. Mohler
- Department of Urology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
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Hamid ARAH, Pfeiffer MJ, Verhaegh GW, Schaafsma E, Brandt A, Sweep FCGJ, Sedelaar JPM, Schalken JA. Aldo-keto reductase family 1 member C3 (AKR1C3) is a biomarker and therapeutic target for castration-resistant prostate cancer. Mol Med 2013. [PMID: 23196782 DOI: 10.2119/molmed.2012.00296] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Current endocrine treatment for advanced prostate cancer does not result in a complete ablation of adrenal androgens. Adrenal androgens can be metabolized by prostate cancer cells, which is one of the mechanisms associated with progression to castration-resistant prostate cancer (CRPC). Aldo-keto reductase family 1 member C3 (AKR1C3) is a steroidogenic enzyme that plays a crucial role in the conversion of adrenal androgen dehydroepiandrosterone (DHEA) into high-affinity ligands for the androgen receptor (testosterone [T] and dihydrotestosterone [DHT]). The aim of this study was to examine whether AKR1C3 could be used as a marker and therapeutic target for CRPC. AKR1C3 mRNA and protein levels were upregulated in CRPC tissue, compared with benign prostate and primary prostate cancer tissue. High AKR1C3 levels were found only in a subset of CRPC patients. AKR1C3 can be used as a biomarker for active intratumoral steroidogenesis and can be measured in biopsy or transurethral resection of the prostate specimens. DuCaP (a CRPC cell line that has high AKR1C3 expression levels) used and converted DHEA under hormone-depleted conditions into T and DHT. The DHEA-induced growth of DuCaP could be antagonized by indomethacine, an inhibitor of AKR1C3. This study indicates that AKR1C3 can be considered a therapeutic target in a subgroup of patients with high AKR1C3 expression.
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Affiliation(s)
- Agus Rizal A H Hamid
- Department of Urology, Radboud University Nijmegen Medical Center, Nijmegen, the Netherlands
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Cózar JM, Solsona E, Morote J, Miñana B, Maroto JP, González Del Alba A, Climent MA, Carles J, Alcaraz A, Castellano D. [Recomendations on the management of controversies in advanced castrate-resistant prostate cancer]. Actas Urol Esp 2012; 36:569-77. [PMID: 22999347 DOI: 10.1016/j.acuro.2012.06.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 06/30/2012] [Indexed: 11/17/2022]
Abstract
CONTEXT Controversies and uncertainties among integral management of advanced castration resistant prostate cancer continue to exist despite the number of evidence based clinical practice guidelines published with high international consensus. OBJECTIVE To develop a document that reviews the management of controversies in advanced castration resistant prostate cancer, with recommendations from the definition, to the management in hormonal maneuvers, first-line treatment and second-line with new treatments as cabazitaxel or abirarerone and the multidisciplinary approach of the pathology with the goal of finding the most efficient, best time to act and safety. EVIDENCE ACQUISITION Two meetings of a multidisciplinary group of experts involved in the management of this disease (Oncologist and Urologist) where pooled analysis of original literature and reached consensus document of recommendations on castration resistant prostate cancer, reviewing and attempting to address the current controversies of the disease. EVIDENCE SYNTHESIS This document is endorsed by the corresponding Scientific Associations and Working Groups involved in the current management of Genitourinary Tumours: the Spanish Association of Urology (AEU) with the Uro-Oncoloy Group (GUO) and the Spanish Oncology of Genitourinary Group (SOGUG). CONCLUSIONS With the adaptation and implementation of this Document of Recommendations for clinical practice are available for the first time, a real road map for quality, efficiency and safety in the management of patients with CRPC.
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Affiliation(s)
- J M Cózar
- Servicio de Urología, Hospital Universitario Virgen de las Nieves, Granada, España.
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Siddiqui M, Rajkumar SV. The high cost of cancer drugs and what we can do about it. Mayo Clin Proc 2012; 87:935-43. [PMID: 23036669 PMCID: PMC3538397 DOI: 10.1016/j.mayocp.2012.07.007] [Citation(s) in RCA: 165] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2012] [Revised: 06/29/2012] [Accepted: 07/11/2012] [Indexed: 10/27/2022]
Affiliation(s)
| | - S. Vincent Rajkumar
- Division of Hematology, Mayo Clinic, Rochester, MN
- Correspondence: Address to S. Vincent Rajkumar, MD, Division of Hematology, Mayo Clinic, 200 First St SW, Rochester, MN 55905
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36
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Acharya M, Gonzalez M, Mannens G, De Vries R, Lopez C, Griffin T, Tran N. A phase I, open-label, single-dose, mass balance study of 14C-labeled abiraterone acetate in healthy male subjects. Xenobiotica 2012; 43:379-89. [PMID: 23020788 DOI: 10.3109/00498254.2012.721022] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
1. Metabolic disposition of (14)C-abiraterone acetate (AA), a prodrug of abiraterone was assessed in a phase I, open-label, single-dose (1000 mg, approximately 100 μCi) study in healthy males (18-55 years, N = 8). Blood, urine, and faecal samples were obtained at specified timepoints for determination of abiraterone concentrations in the plasma, total radioactivity (TR), and the metabolite profile. 2. Most plasma AA concentrations were below the limit of quantification. The mean maximum plasma concentration (Cmax) of abiraterone was 10.4 ng/mL, mean area under the plasma concentration-time curve (AUC) from 0 to the last measurable plasma concentration (AUC0-last) was 74.8 ng·h/mL. The exposures for TR in plasma (Cmax = 3429 ng·eq/mL; AUC0-last = 26,683 ng eq·h/mL) and whole blood (Cmax = 1836 ng·eq/mL; AUC0-last = 12,162 ng·eq·h/mL) were >300-fold higher than abiraterone exposure in plasma. The majority of TR resided in the plasma compartment of blood. 3. Main circulating metabolites were abiraterone sulfate and N-oxide abiraterone sulfate. The main metabolite excreted in urine was N-oxide abiraterone sulfate (4.22% of TR). Major components of TR in faeces were unchanged AA (55.3% of TR) and abiraterone (22.3% of TR). Mean recovery of TR in faeces was 87.9%, indicating faeces as primary route of excretion.
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Affiliation(s)
- Milin Acharya
- Janssen Research & Development, LLC, Raritan, NJ, USA
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37
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Biomarker-based targeting of the androgen-androgen receptor axis in advanced prostate cancer. Adv Urol 2012; 2012:781459. [PMID: 22956944 PMCID: PMC3432332 DOI: 10.1155/2012/781459] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2012] [Accepted: 06/09/2012] [Indexed: 12/18/2022] Open
Abstract
Recent therapeutic advances for managing advanced prostate cancer include the successful targeting of the androgen-AR axis with several new drugs in castrate resistant prostate cancer including abiraterone acetate and enzalutamide (MDV3100). This translational progress from “bench to bed-side” has resulted in an enlarging repertoire of novel and traditional drug choices now available for use in advanced prostate cancer therapeutics, which has had a positive clinical impact in prolonging longevity and quality of life of advanced prostate cancer patients. In order to further the clinical utility of these drugs, development of predictive biomarkers guiding individual therapeutic choices remains an ongoing challenge. This paper will summarize the potential in developing predictive biomarkers based on the pathophysiology of the androgen-AR axis in tumor tissue from patients with advanced prostate cancer as well as inherited variation in the patient's genome. Specific examples of rational clinical trial designs incorporating potential predictive biomarkers from these pathways will illustrate several aspects of pharmacogenetic and pharmacogenomic predictive biomarker development in advanced prostate cancer therapeutics.
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Schweizer MT, Antonarakis ES. Abiraterone and other novel androgen-directed strategies for the treatment of prostate cancer: a new era of hormonal therapies is born. Ther Adv Urol 2012; 4:167-78. [PMID: 22852027 PMCID: PMC3398601 DOI: 10.1177/1756287212452196] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The number of life-prolonging therapies proven effective in the treatment of metastatic castrate-resistant prostate cancer (CRPC) has been limited until recently. In the past 2 years several such therapies have come to market. In 2010, the autologous immunotherapy sipuleucel-T and the next-generation taxane cabazitaxel were approved in this setting. However, abundant evidence has shown that CRPC growth continues to be driven through androgen-dependent signaling. Both of these drugs fail to take advantage of this targetable oncogenic pathway. Potent specific inhibitors of cytochrome P450-17 have been engineered with the aim of suppressing androgen synthesis beyond that seen with the luteinizing hormone-releasing hormone agonists/antagonists. Abiraterone acetate was developed by rational design based on a pregnenolone parent structure. Its approval by the US Food and Drug Administration (FDA) was granted in 2011 based on phase III data demonstrating an overall survival advantage compared with placebo. More recently, other drugs that act along the androgen signaling pathway, such as orteronel (TAK-700), galeterone (TOK-001), enzalutamide (MDV3100) and ARN-509, have shown promise in clinical trials. Some of these are expected to gain FDA approval in the near future. Here, we review abiraterone and other novel androgen-directed therapeutic strategies for the management of advanced prostate cancer.
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Affiliation(s)
- Michael T Schweizer
- Prostate Cancer Research Program, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, MD, USA
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Xu D, Lin TH, Zhang C, Tsai YC, Li S, Zhang J, Yin M, Yeh S, Chang C. The selective inhibitory effect of a synthetic tanshinone derivative on prostate cancer cells. Prostate 2012; 72:803-16. [PMID: 21932429 DOI: 10.1002/pros.21474] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2011] [Accepted: 07/18/2011] [Indexed: 02/01/2023]
Abstract
BACKGROUND Androgen receptor (AR) is the main therapeutic target for the treatment of prostate cancer (PCa). Anti-androgens to reduce or prevent androgens binding to AR are widely used to suppress AR-mediated PCa growth; however, the androgen depletion therapy (ADT) is only effective for a short period of time. Here we tested PTS33, a new sodium derivative of cryptotanshinone, which can effectively inhibit the DHT-induced AR transactivation and PCa cell growth, and then explored the effects of PTS33 on inhibiting the expressions of AR target genes and proteins. METHODS PCa cells, LNCaP, CWR22Rv1, C4-2, PC-3, and DU145, were treated with PTS33 and luciferase assay was used to evaluate the ability of each to regulate AR transactivation. RT-PCR was used to evaluate the mRNA levels of AR target genes such as PSA, TMPRSS2, and TMEPA1. Western blot was used to determine AR, PSA, estrogen receptor alpha (ERα), glucocorticoid receptor (GR), and progesterone receptor (PR) protein expression. Cell growth and IC50 were determined by MTT assay after 48 hr treatment. RESULTS Our data showed that PTS33 selectively inhibits AR activities, but PTS33 does not repress the activities of other nuclear receptors, including ERα, GR, and PR. At a low concentration, 2 µM of PTS33 effectively suppresses the growth of AR-positive PCa cells, and has little effect on AR-negative PCa cells. Furthermore, our data indicated that PTS33 could modulate AR transactivation and suppress the AR target genes (PSA, TMPRSS2, and TMEPA1) expression in both androgen responsive PCa LNCaP cells and castration-resistant C4-2 cells. In addition, PTS33 can also inhibit estrogen/Δ5-androstenediol induced AR activities. The mechanistic studies indicate that PTS33 can inhibit AR function by suppression of AR protein expression, the AR N-C interaction, and AR-coregulator interaction. CONCLUSIONS PTS33 has shown a good efficacy to inhibit AR transactivation, block AR regulated gene expression, and reduce cell growth in AR positive PCa cells. The structure of PTS33 could be used as a base for development of novel AR signaling inhibitors to treat PCa.
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Affiliation(s)
- Defeng Xu
- Department of Urology, Pathology, Radiation Oncology, George H. Whipple Laboratory for Cancer Research, University of Rochester Medical Center, Rochester, New York, USA
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Acharya M, Bernard A, Gonzalez M, Jiao J, De Vries R, Tran N. Open-label, phase I, pharmacokinetic studies of abiraterone acetate in healthy men. Cancer Chemother Pharmacol 2012; 69:1583-90. [PMID: 22526411 PMCID: PMC3362727 DOI: 10.1007/s00280-012-1865-3] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Accepted: 03/26/2012] [Indexed: 11/30/2022]
Abstract
Purpose To evaluate pharmacokinetics, safety, and tolerability of abiraterone acetate (AA) in healthy men. Methods Two phase I studies (dose-escalation study and dose-proportionality study) were conducted in healthy men aged 18–55 years. All subjects received 4 consecutive single doses of AA (250, 500, 750 and 1,000 mg). The dose-escalation study subjects (N = 33) received AA doses in a sequential manner, starting with the lowest dose. The dose-proportionality study subjects (N = 32) were randomly allocated (1:1:1:1) to receive each of the 4 doses in a four-way crossover design. Results A dose-related increase in abiraterone exposure was observed in both studies. Over the evaluated dose range, the mean abiraterone maximum plasma concentrations increased from 26 to 112 ng/mL in dose-escalation study and from 40 to 125 ng/mL in dose-proportionality study; the mean area under the plasma concentration–time curve from 0 to the last measurable plasma concentration increased from 155 to 610 ng.h/mL in dose-escalation study, and from 195 to 607 ng.h/mL in dose-proportionality study. In the dose-proportionality study, abiraterone exposure was dose proportional between 1,000 and 750 mg doses; however, the exposure was slightly greater than dose proportional when exposures at 500 and 250 mg doses were compared with the exposure at 1,000 mg. Single doses of AA were well tolerated in healthy men, and safety profile was consistent with its known toxicities in CRPC patients. Conclusion Systemic exposure to abiraterone increased with increasing doses of AA (250–1,000 mg) in healthy men; AA was well tolerated in this population.
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Affiliation(s)
- M Acharya
- Janssen Research and Development, LLC, 920 Route 202 South, Raritan, NJ 08869, USA.
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Abstract
Since a number of years, prostate cancer has been the most frequent cancer site among men in Germany and has replaced lung cancer as the leading position. Among the most frequent cancer sites, it is the one with the lowest available knowledge about etiology. Smoking and alcohol apparently do not play a role. Regarding food intake, indications exist for a protective association to tomatoes or lycopene consumption and a protective association was also seen with high physical activity, while risk seems to be elevated in obese men. Associations to hormonal factors have been observed and are under consideration. Trials with potential chemopreventive agents have been unsuccessful so far. For early detection, digital rectal examination has been part of the German statutory early detection program" from the very beginning in 1971 and the test for prostate specific antigen (PSA) is being used in the framework of the so-called individual health services, both without scientific evidence of effectiveness. The available data show that the progression of prostate cancer to the leading male cancer site was chiefly driven by the unstructured introduction of the PSA test as a screening tool. Cynically addressed, the figures indicate that the most efficient known preventive intervention was not to attend screening. This delicate situation should, however, not discourage from further examinations of prostate cancer screening. Recent results including the European randomized prostate cancer screening study (ERSPC) indicated that intelligently structured screening, possibly even using the PSA test, might be effective. Before routine application the novel approaches also have to be scrutinized in a research setting.
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Kohli M, Riska SM, Mahoney DW, Chai HS, Hillman DW, Rider DN, Costello BA, Qin R, Lamba J, Sahasrabudhe DM, Cerhan JR. Germline predictors of androgen deprivation therapy response in advanced prostate cancer. Mayo Clin Proc 2012; 87:240-6. [PMID: 22386179 PMCID: PMC3538410 DOI: 10.1016/j.mayocp.2011.09.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2011] [Revised: 09/08/2011] [Accepted: 09/26/2011] [Indexed: 11/21/2022]
Abstract
OBJECTIVE To evaluate whether germline variations in genes involved in sex steroid biosynthesis and metabolic pathways predict time to treatment failure for patients with advanced prostate cancer undergoing androgen deprivation therapy (ADT), because there are few known clinical predictors of response. PATIENTS AND METHODS In a cohort of 304 patients with advanced prostate cancer undergoing ADT, we genotyped 746 single-nucleotide polymorphisms (SNPs) from 72 genes from germline DNA (680 tagSNPs from 58 genes and 66 candidate SNPs from 20 genes [6 genes common in both]). Association with the primary end point of time to ADT failure was assessed using proportional hazards regression models at the gene level (for genes with tagging SNPs) and at the SNP level. False discovery rates (FDRs) of 0.10 or less were considered noteworthy to account for multiple testing. RESULTS At the gene level, TRMT11 showed the strongest association with time to ADT failure (P<.001; FDR=0.008). Two of 4 TRMT11 tagSNPs were associated with time to ADT failure. Median time to ADT failure for rs1268121 (A>G) was 3.05 years for the AA, 4.27 years for the AG, and 6.22 years for the GG genotypes (P=.002), and for rs6900796 (G>A), it was 2.42 years for the GG, 3.52 years for the AG, and 4.18 years for the AA genotypes (P<.001). No other gene level or SNP level tests had an FDR of 0.10 or less. CONCLUSION Genetic variation in TRMT11 was associated with time to ADT failure. Confirmation of these preliminary findings in an independent cohort is needed.
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Affiliation(s)
- Manish Kohli
- Department of Oncology, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA.
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Development and clinical utility of abiraterone acetate as an androgen synthesis inhibitor. Clin Pharmacol Ther 2011; 91:101-8. [PMID: 22130117 DOI: 10.1038/clpt.2011.275] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
In April 2011, abiraterone acetate (AA) was approved by the US Food and Drug Administration (FDA) for the treatment of metastatic castration-resistant prostate cancer (CRPC) after chemotherapy. The development of AA is the direct result of our increased understanding of the intricacies of the androgen receptor (AR) pathway and its natural evolution in prostate cancer cells over the course of treatment. In this paper we review the biology of the AR and how it led to the rational design of AA. We also examine the clinical development of AA, its current use, and questions to be addressed for future development.
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Selth LA, Townley S, Gillis JL, Ochnik AM, Murti K, Macfarlane RJ, Chi KN, Marshall VR, Tilley WD, Butler LM. Discovery of circulating microRNAs associated with human prostate cancer using a mouse model of disease. Int J Cancer 2011; 131:652-61. [PMID: 22052531 DOI: 10.1002/ijc.26405] [Citation(s) in RCA: 144] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2011] [Accepted: 08/16/2011] [Indexed: 01/08/2023]
Abstract
Circulating microRNAs (miRNAs) are emerging as useful non-invasive markers of disease. The objective of this study was to use a mouse model of prostate cancer as a tool to discover serum miRNAs that could be assessed in a clinical setting. Global miRNA profiling identified 46 miRNAs at significantly altered levels (p ≤ 0.05) in the serum of TRansgenic Adenocarcinoma of Mouse Prostate (TRAMP) mice with advanced prostate cancer compared to healthy controls. A subset of these miRNAs with known human homologues were validated in an independent cohort of mice and then measured in serum from men with metastatic castration-resistant prostate cancer (mCRPC; n = 25) or healthy men (n = 25). Four miRNAs altered in mice, mmu-miR-141, mmu-miR-298, mmu-miR-346 and mmu-miR-375, were also found to be at differential levels in the serum of men with mCRPC. Three of these (hsa-miR-141, hsa-miR-298 and hsa-miR-375) were upregulated in prostate tumors compared with normal prostate tissue, suggesting that they are released into the blood as disease progresses. Moreover, the intra-tumoral expression of hsa-miR-141 and hsa-miR-375 were predictors of biochemical relapse after surgery. This study is the first to demonstrate that specific serum miRNAs are common between human prostate cancer and a mouse model of the disease, highlighting the potential of such models for the discovery of novel biomarkers.
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Affiliation(s)
- Luke A Selth
- Dame Roma Mitchell Cancer Research Laboratories, Discipline of Medicine, University of Adelaide, Hanson Institute, Adelaide, South Australia, Australia.
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Arbini AA, Greco M, Yao JL, Bourne P, Marra E, Hsieh JT, di Sant'agnese PA, Moro L. Skp2 overexpression is associated with loss of BRCA2 protein in human prostate cancer. THE AMERICAN JOURNAL OF PATHOLOGY 2011; 178:2367-76. [PMID: 21514447 DOI: 10.1016/j.ajpath.2011.01.050] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2010] [Revised: 11/29/2010] [Accepted: 01/07/2011] [Indexed: 11/28/2022]
Abstract
BRCA2 (breast cancer 2, early onset) is a tumor suppressor gene that confers increased susceptibility for prostate cancer (PCa). Previous in vitro experiments demonstrated that Skp2, an E3 ubiquitin ligase aberrantly overexpressed in PCa, is involved in the proteolytic degradation of BRCA2 in PCa cells, suggesting that the BRCA2-Skp2 interaction may play a role in prostate tumorigenesis. Herein, we investigated BRCA2 and Skp2 expression during PCa development using a prostate TMA. Although luminal and basal benign prostate epithelium exhibited moderate to strong nuclear BRCA2 immunostaining, the intensity and number of positive nuclei decreased significantly in high-grade prostatic intraepithelial neoplasia and PCa. Decreased frequency and intensity of nuclear BRCA2 labeling were inversely correlated with Skp2 expression in high-grade prostatic intraepithelial neoplasia and PCa. To functionally assess the effects of BRCA2 and Skp2 expression on prostate malignant transformation, we overexpressed Skp2 in normal immortalized prostate cells. Skp2 overexpression reduced BRCA2 protein and promoted cell growth and migration. A similar phenotype was observed after reduction of BRCA2 protein levels using specific BRCA2 small-interfering RNA. Forced BRCA2 expression in Skp2-overexpressing stable transfectants inhibited the migratory and growth properties by >60%. These results show that loss of BRCA2 expression during prostate tumor development is strongly correlated with both migratory behavior and cancer growth and include Skp2 as a BRCA2 proteolytic partner in vivo.
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Affiliation(s)
- Arnaldo A Arbini
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
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Allioli N, Vincent S, Vlaeminck-Guillem V, Decaussin-Petrucci M, Ragage F, Ruffion A, Samarut J. TM4SF1, a novel primary androgen receptor target gene over-expressed in human prostate cancer and involved in cell migration. Prostate 2011; 71:1239-50. [PMID: 21656834 DOI: 10.1002/pros.21340] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2010] [Accepted: 12/13/2010] [Indexed: 11/09/2022]
Abstract
BACKGROUND The Androgen Receptor (AR) plays a key role in controlling prostate gland homeostasis and contributes to prostate carcinogenesis. The identification of its target genes should provide new candidates that may be implicated in cancer initiation and progression. METHODS Transcriptomic experiments and chromatin immunoprecipitation were combined to identify direct androgen regulated genes. Real-time quantitative PCR (RT-qPCR) analyses were performed to measure TM4SF1 mRNA levels in prostate cancer and benign prostatic hyperplasia (BPH) specimens. Immunohistochemical methods were used to compare TM4SF1 protein expression profiles in the same cohort. A targeted siRNAs knockdown strategy was used, prior to wound healing assays, to analyze the role of TM4SF1 in cell migration in vitro. RESULTS We demonstrate for the first time that TM4SF1 is a direct target gene of the AR, a transcription factor of the steroid nuclear receptor family. A functional androgen response element was identified in the promoter region of the gene. In addition, TM4SF1 mRNA expression was higher in cancer samples compared to BPH tissues. The TM4SF1 protein mediates cell motility of prostate cancer cells where it is predominantly localized in the cytoplasm, in contrast to its apical membrane localization in normal prostate epithelial cells. CONCLUSIONS Our results reveal a novel function for TM4SF1 in AR signaling. The TM4SF1 mRNA expression is higher in prostate cancer tissues as compared to BPH samples. Inhibition of cell migration after targeted knockdown of TM4SF1 protein expression suggests its contribution to prostate cancer cell metastasis.
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MESH Headings
- Antigens, Surface/biosynthesis
- Antigens, Surface/genetics
- Antigens, Surface/physiology
- Biomarkers, Tumor/biosynthesis
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/physiology
- Cell Line, Tumor
- Cell Migration Inhibition/genetics
- Gene Expression Regulation, Neoplastic
- HeLa Cells
- Humans
- Male
- Neoplasm Proteins/biosynthesis
- Neoplasm Proteins/genetics
- Neoplasm Proteins/physiology
- Prostatic Hyperplasia/genetics
- Prostatic Hyperplasia/metabolism
- Prostatic Neoplasms/genetics
- Prostatic Neoplasms/metabolism
- Receptors, Androgen/biosynthesis
- Receptors, Androgen/genetics
- Receptors, Androgen/physiology
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Affiliation(s)
- Nathalie Allioli
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Lyon, France.
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Redding MB, Surati M. Emerging Treatments for Castrate-Resistant Prostate Cancer. J Pharm Pract 2011; 24:366-73. [DOI: 10.1177/0897190010397718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Castrate-resistant prostate cancer (CRPC) is a challenging aspect in the treatment of prostate cancer. Research has identified several pathways in the pathogenesis of CRPC. Several new agents targeting some of these pathways have shown promising data during clinical trials. In the area of androgen depletion, abiraterone acetate and MDV100 have been studied and have shown to decrease prostate-specific antigen (PSA) levels in phase I and II studies. Bevacizumab is a monoclonal antibody antiangiogenesis agent that targets vascular endothelial growth factor (VEGF) and has shown to decrease PSA levels in combination with other cytotoxic agents. Three agents, ixabepilone, patupilone, and sagopilone, in the class of epothilones (tubulin polymerizing antitumor agents), have shown moderate reductions in PSA levels and moderate adverse effects. The results of ongoing studies with these new treatment agents may offer viable alternatives to the traditional treatment of CRPC to decrease disease progression and improve overall survival.
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Affiliation(s)
- Michell B. Redding
- Department of Pharmacy Practice, Mercer University College of Pharmacy and Health Sciences, Atlanta, GA, USA
| | - Minal Surati
- Emory University Hospital/Winship Cancer Institute, Atlanta, GA, USA
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Role of autonomous androgen receptor signaling in prostate cancer initiation is dichotomous and depends on the oncogenic signal. Proc Natl Acad Sci U S A 2011; 108:7962-7. [PMID: 21518863 DOI: 10.1073/pnas.1105243108] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
The steroid hormone signaling axis is thought to play a central role in initiation and progression of many hormonally regulated epithelial tumors. It is unclear whether all cancer-initiating signals depend on an intact hormone receptor signaling machinery. To ascertain whether cell autonomous androgen receptor (AR) is essential for initiation of prostate intraepithelial neoplasia (PIN), the response of AR-null prostate epithelia to paracrine and cell autonomous oncogenic signals was assessed in vivo by using the prostate regeneration model system. Epithelial-specific loss of AR blocked paracrine FGF10-induced PIN, whereas the add back of exogenous AR restored this response. In contrast, PIN initiated by cell-autonomous, chronic-activated AKT developed independent of epithelial AR signaling. Our findings demonstrate a selective role for AR in the initiation of PIN, dependent on the signaling pathways driving tumor formation. Insights into the role of hormone receptor signaling in the initiation of epithelial tumors may help define this axis as a target for chemoprevention of carcinomas.
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Affiliation(s)
- William L. Lanier
- Address correspondence to William L. Lanier, MD, Mayo Clinic Proceedings, 200 First St SW, Rochester, MN 55905 ()
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