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Huang M, Chen L, Guo Y, Ruan Y, Xu H. PARP1 negatively regulates transcription of BLM through its interaction with HSP90AB1 in prostate cancer. J Transl Med 2023; 21:445. [PMID: 37415147 PMCID: PMC10324254 DOI: 10.1186/s12967-023-04288-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 06/19/2023] [Indexed: 07/08/2023] Open
Abstract
BACKGROUND Prostate cancer (PCa) is a prevalent malignant disease affecting a significant number of males globally. Elevated expression of the Bloom's syndrome protein (BLM) helicase has emerged as a promising cancer biomarker, being associated with the onset and progression of PCa. Nevertheless, the precise molecular mechanisms governing BLM regulation in PCa remain elusive. METHODS The expression of BLM in human specimens was analyzed using immnohistochemistry (IHC). A 5'-biotin-labeled DNA probe containing the promoter region of BLM was synthesized to pull down BLM promoter-binding proteins. Functional studies were conducted using a range of assays, including CCK-8, EdU incorporation, clone formation, wound scratch, transwell migration, alkaline comet assay, xenograft mouse model, and H&E staining. Mechanistic studies were carried out using various techniques, including streptavidin-agarose-mediated DNA pull-down, mass spectrometry (MS), immunofluorescence (IF), dual luciferase reporter assay system, RT-qPCR, ChIP-qPCR, co-immunoprecipitation (co-IP), and western blot. RESULTS The results revealed significant upregulation of BLM in human PCa tissues, and its overexpression was associated with an unfavorable prognosis in PCa patients. Increased BLM expression showed significant correlations with advanced clinical stage (P = 0.022) and Gleason grade (P = 0.006). In vitro experiments demonstrated that BLM knockdown exerted inhibitory effects on cell proliferation, clone formation, invasion, and migration. Furthermore, PARP1 (poly (ADP-ribose) polymerase 1) was identified as a BLM promoter-binding protein. Further investigations revealed that the downregulation of PARP1 led to increased BLM promoter activity and expression, while the overexpression of PARP1 exerted opposite effects. Through mechanistic studies, we elucidated that the interaction between PARP1 and HSP90AB1 (heat shock protein alpha family class B) enhanced the transcriptional regulation of BLM by counteracting the inhibitory influence of PARP1 on BLM. Furthermore, the combination treatment of olaparib with ML216 demonstrated enhanced inhibitory effects on cell proliferation, clone formation, invasion, and migration. It also induced more severe DNA damage in vitro and exhibited superior inhibitory effects on the proliferation of PC3 xenograft tumors in vivo. CONCLUSIONS The results of this study underscore the significance of BLM overexpression as a prognostic biomarker for PCa, while also demonstrating the negative regulatory impact of PARP1 on BLM transcription. The concurrent targeting of BLM and PARP1 emerges as a promising therapeutic approach for PCa treatment, holding potential clinical significance.
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Affiliation(s)
- Mengqiu Huang
- Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region (Ministry of Education), College of Life Sciences, Guizhou University, Guiyang, 550025, Guizhou, China
- College of Animal Science, Guizhou University, Guiyang, 550025, Guizhou, China
| | - Lin Chen
- Department of Ophthalmology, Affiliated Hospital of Zunyi Medical University, Zunyi, 563000, Guizhou, China
| | - Yingchu Guo
- College of Animal Science, Guizhou University, Guiyang, 550025, Guizhou, China
- Guizhou University school of Medicine, Guizhou University, Guiyang, 550025, Guizhou, China
| | - Yong Ruan
- College of Animal Science, Guizhou University, Guiyang, 550025, Guizhou, China
- Guizhou University school of Medicine, Guizhou University, Guiyang, 550025, Guizhou, China
| | - Houqiang Xu
- Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region (Ministry of Education), College of Life Sciences, Guizhou University, Guiyang, 550025, Guizhou, China.
- College of Animal Science, Guizhou University, Guiyang, 550025, Guizhou, China.
- Guizhou University school of Medicine, Guizhou University, Guiyang, 550025, Guizhou, China.
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Kakkat S, Pramanik P, Singh S, Singh AP, Sarkar C, Chakroborty D. Cardiovascular Complications in Patients with Prostate Cancer: Potential Molecular Connections. Int J Mol Sci 2023; 24:ijms24086984. [PMID: 37108147 PMCID: PMC10138415 DOI: 10.3390/ijms24086984] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/21/2023] [Accepted: 03/30/2023] [Indexed: 04/29/2023] Open
Abstract
Cardiovascular diseases (CVDs) and complications are often seen in patients with prostate cancer (PCa) and affect their clinical management. Despite acceptable safety profiles and patient compliance, androgen deprivation therapy (ADT), the mainstay of PCa treatment and chemotherapy, has increased cardiovascular risks and metabolic syndromes in patients. A growing body of evidence also suggests that patients with pre-existing cardiovascular conditions show an increased incidence of PCa and present with fatal forms of the disease. Therefore, it is possible that a molecular link exists between the two diseases, which has not yet been unraveled. This article provides insight into the connection between PCa and CVDs. In this context, we present our findings linking PCa progression with patients' cardiovascular health by performing a comprehensive gene expression study, gene set enrichment (GSEA) and biological pathway analysis using publicly available data extracted from patients with advanced metastatic PCa. We also discuss the common androgen deprivation strategies and CVDs most frequently reported in PCa patients and present evidence from various clinical trials that suggest that therapy induces CVD in PCa patients.
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Affiliation(s)
- Sooraj Kakkat
- Department of Pathology, University of South Alabama, Mobile, AL 36617, USA
- Cancer Biology Program, Mitchell Cancer Institute, University of South Alabama, Mobile, AL 36604, USA
| | - Paramahansa Pramanik
- Department of Mathematics and Statistics, University of South Alabama, Mobile, AL 36688, USA
| | - Seema Singh
- Department of Pathology, University of South Alabama, Mobile, AL 36617, USA
- Cancer Biology Program, Mitchell Cancer Institute, University of South Alabama, Mobile, AL 36604, USA
- Department of Biochemistry and Molecular Biology, University of South Alabama, Mobile, AL 36688, USA
| | - Ajay Pratap Singh
- Department of Pathology, University of South Alabama, Mobile, AL 36617, USA
- Cancer Biology Program, Mitchell Cancer Institute, University of South Alabama, Mobile, AL 36604, USA
- Department of Biochemistry and Molecular Biology, University of South Alabama, Mobile, AL 36688, USA
| | - Chandrani Sarkar
- Department of Pathology, University of South Alabama, Mobile, AL 36617, USA
- Cancer Biology Program, Mitchell Cancer Institute, University of South Alabama, Mobile, AL 36604, USA
- Department of Biochemistry and Molecular Biology, University of South Alabama, Mobile, AL 36688, USA
| | - Debanjan Chakroborty
- Department of Pathology, University of South Alabama, Mobile, AL 36617, USA
- Cancer Biology Program, Mitchell Cancer Institute, University of South Alabama, Mobile, AL 36604, USA
- Department of Biochemistry and Molecular Biology, University of South Alabama, Mobile, AL 36688, USA
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Yang K, Feng S, Luo Z. Oncolytic Adenovirus, a New Treatment Strategy for Prostate Cancer. Biomedicines 2022; 10:biomedicines10123262. [PMID: 36552019 PMCID: PMC9775875 DOI: 10.3390/biomedicines10123262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 12/12/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022] Open
Abstract
Prostate cancer is the most common cancer and one of the leading causes of cancer mortality in males. Androgen-deprivation therapy (ADT) is an effective strategy to inhibit tumour growth at early stages. However, 10~50% of cases are estimated to progress to metastatic castration-resistant prostate cancer (mCRPC) which currently lacks effective treatments. Clinically, salvage treatment measures, such as endocrine therapy and chemotherapy, are mostly used for advanced prostate cancer, but their clinical outcomes are not ideal. When the existing clinical therapeutic methods can no longer inhibit the development of advanced prostate cancer, human adenovirus (HAdV)-based gene therapy and viral therapy present promising effects. Pre-clinical studies have shown its powerful oncolytic effect, and clinical studies are ongoing to further verify its effect and safety in prostate cancer treatment. Targeting the prostate by HAdV alone or in combination with radiotherapy and chemotherapy sheds light on patients with castration-resistant and advanced prostate cancer. This review summarizes the advantages of oncolytic virus-mediated cancer therapy, strategies of HAdV modification, and existing preclinical and clinical investigations of HAdV-mediated gene therapy to further evaluate the potential of oncolytic adenovirus in prostate cancer treatment.
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Affiliation(s)
- Kaiyi Yang
- Department of Urology, Xiangya Hospital, Central South University, Changsha 410008, China
- Correspondence: (K.Y.); (Z.L.)
| | - Shenghui Feng
- Provincial Key Laboratory of Tumour Pathogens and Molecular Pathology, Queen Mary School, Nanchang University, Nanchang 330031, China
| | - Zhijun Luo
- Provincial Key Laboratory of Tumour Pathogens and Molecular Pathology, Queen Mary School, Nanchang University, Nanchang 330031, China
- Correspondence: (K.Y.); (Z.L.)
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White J, Ory J, Morris H, Rendon RA, Mason R, Cox A. Urological outcomes in nonagenarians with prostate cancer. Can Urol Assoc J 2021; 15:E393-E396. [PMID: 33410737 DOI: 10.5489/cuaj.6805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Nonagenarians represent a growing patient population. Herein, we report on the largest cohort of Canadian nonagenarian patients, to our knowledge, with prostate cancer. METHODS A retrospective chart of 44 nonagenarian men diagnosed with localized or metastatic prostate cancer between 2006 and 2019 was performed. Diagnoses were based on pathological specimens or the presence of a high prostate-specific antigen (PSA >20) or abnormal digital rectal exam (DRE) in the setting of metastatic disease on imaging. Patient demographics, presenting complaints, and treatments required were included in the analysis. A descriptive statistical analysis was performed. RESULTS The median patient age at time of referral was 91.1 years (interquartile range [IQR] 90.2-92.9). The median PSA at time of referral was 54.0 (IQR 18.2-142.6). Metastatic disease was present in 55% of patients at time of diagnosis (n=24). Most patients required at least one urological intervention (n=35). There were 56.8% of patients who received androgen deprivation therapy (ADT) as part of their treatment regime (n=25). Half (50%) of patients were managed with androgen receptor axis-targeted agents (ARAT), as well as ADT (n=22). Five patients (11.4%) underwent surgical castration. Death due to any cause was noted in 52.3% of patients (n=23) throughout the study period, with the median age at death being 94.4 years (IQR 92.3-97.0). Death due to prostate cancer was noted in 18.2% of patients (n=8). CONCLUSIONS This study highlights common presenting complaints for nonagenarian patients with prostate cancer and that many require urological intervention despite advanced age. Future studies should address patient-reported quality-of-life outcomes in the nonagenarian population with prostate cancer.
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Affiliation(s)
- Josh White
- Department of Urology, Dalhousie University; Halifax, NS, Canada
| | - Jesse Ory
- Department of Urology, Dalhousie University; Halifax, NS, Canada
| | - Heather Morris
- Department of Urology, Dalhousie University; Halifax, NS, Canada
| | - Ricardo A Rendon
- Department of Urology, Dalhousie University; Halifax, NS, Canada
| | - Ross Mason
- Department of Urology, Dalhousie University; Halifax, NS, Canada
| | - Ashley Cox
- Department of Urology, Dalhousie University; Halifax, NS, Canada
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Wang X, Ha D, Mori H, Chen S. White button mushroom (Agaricus bisporus) disrupts androgen receptor signaling in human prostate cancer cells and patient-derived xenograft. J Nutr Biochem 2020; 89:108580. [PMID: 33388344 DOI: 10.1016/j.jnutbio.2020.108580] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 12/09/2020] [Accepted: 12/11/2020] [Indexed: 02/07/2023]
Abstract
White button mushroom (WBM) (Agaricus bisporus) is a potential prostate cancer (PCa) chemo-preventative and therapeutic agent. Our clinical phase І trial of WBM powder in patients with biochemically recurrent PCa indicated that WBM intake reduced the circulating levels of prostate-specific antigen (PSA). We hypothesized that WBM exerts its effects on PCa through the androgen receptor (AR) signaling axis. Therefore, we conducted a reverse translational study with androgen-dependent PCa cell lines (LNCaP and VCaP) and patient-derived-xenografts (PDX) from a prostate tumor (TM00298). In both LNCaP and VCaP cells, western blots and qRT-PCR assays indicated that WBM extract (6-30 mg/mL) suppressed DHT-induced PSA expression and cell proliferation in a dose-dependent manner. Immunofluorescence analysis of AR revealed that WBM extract interrupted the AR nuclear-cytoplasmic distribution. PSA promotor-luciferase assay suggested that WBM extract inhibited DHT-induced luciferase activity. RNA-Seq on WBM-treated LNCaP cells confirmed that WBM treatment suppressed the androgen response pathways and cell-cycle control pathways. Our PDX showed that oral intake of WBM extract (200 mg/kg/d) suppressed tumor growth and decreased PSA levels in both tumors and serum. In the present study, we also identified a conjugated linoleic acid isomer (CLA-9Z11E) as a strong AR antagonist by performing LanthaScreen TR-FRET AR Coactivator Interaction Assays. The inhibitory effect of CLA-9Z11E (IC50: 350 nM) was nearly two times stronger than the known AR antagonist, cyproterone acetate (IC50: 672 nM). The information gained from this study improves the overall understanding of how WBM may contribute to the prevention and treatment of PCa.
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Affiliation(s)
- Xiaoqiang Wang
- Department of Cancer Biology, Beckman Research Institute of City of Hope, Duarte, CA, USA
| | - Desiree Ha
- Department of Cancer Biology, Beckman Research Institute of City of Hope, Duarte, CA, USA
| | - Hitomi Mori
- Department of Cancer Biology, Beckman Research Institute of City of Hope, Duarte, CA, USA
| | - Shiuan Chen
- Department of Cancer Biology, Beckman Research Institute of City of Hope, Duarte, CA, USA.
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Penning TM, Asangani IA, Sprenger C, Plymate S. Intracrine androgen biosynthesis and drug resistance. CANCER DRUG RESISTANCE (ALHAMBRA, CALIF.) 2020; 3:912-929. [PMID: 35582223 PMCID: PMC8992556 DOI: 10.20517/cdr.2020.60] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 09/30/2020] [Accepted: 10/10/2020] [Indexed: 06/15/2023]
Abstract
Castration-resistant prostate cancer is the lethal form of prostate cancer and most commonly remains dependent on androgen receptor (AR) signaling. Current therapies use AR signaling inhibitors (ARSI) exemplified by abiraterone acetate, a P450c17 inhibitor, and enzalutamide, a potent AR antagonist. However, drug resistance to these agents occurs within 12-18 months and they only prolong overall survival by 3-4 months. Multiple mechanisms can contribute to ARSI drug resistance. These mechanisms can include but are not limited to germline mutations in the AR, post-transcriptional alterations in AR structure, and adaptive expression of genes involved in the intracrine biosynthesis and metabolism of androgens within the tumor. This review focuses on intracrine androgen biosynthesis, how this can contribute to ARSI drug resistance, and therapeutic strategies that can be used to surmount these resistance mechanisms.
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Affiliation(s)
- Trevor M. Penning
- Department of Systems Pharmacology & Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Irfan A. Asangani
- Department Cancer Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Cynthia Sprenger
- Division of Gerontology & Geriatric Medicine, Department of Medicine, University of Washington, Seattle, WA 98109, USA
| | - Stephen Plymate
- Division of Gerontology & Geriatric Medicine, Department of Medicine, University of Washington, Seattle, WA 98109, USA
- Geriatric Research Education and Clinical Center (GRECC), VA Puget Sound Health Care System, Seattle, WA 98108, USA
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Angiogenesis Inhibition in Prostate Cancer: An Update. Cancers (Basel) 2020; 12:cancers12092382. [PMID: 32842503 PMCID: PMC7564110 DOI: 10.3390/cancers12092382] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 08/14/2020] [Accepted: 08/21/2020] [Indexed: 12/18/2022] Open
Abstract
Prostate cancer (PCa), like all other solid tumors, relies on angiogenesis for growth, progression, and the dissemination of tumor cells to other parts of the body. Despite data from in vitro and in vivo preclinical studies, as well as human specimen studies indicating the crucial role played by angiogenesis in PCa, angiogenesis inhibition in clinical settings has not shown significant benefits to patients, thus challenging the inclusion and usefulness of antiangiogenic agents for the treatment of PCa. However, one of the apparent reasons why these antiangiogenic agents failed to meet expectations in PCa can be due to the choice of the antiangiogenic agents, because the majority of these drugs target vascular endothelial growth factor-A (VEGFA) and its receptors. The other relevant causes might be inappropriate drug combinations, the duration of treatment, and the method of endpoint determination. In this review, we will first discuss the role of angiogenesis in PCa growth and progression. We will then summarize the different angiogenic growth factors that influence PCa growth dynamics and review the outcomes of clinical trials conducted with antiangiogenic agents in PCa patients and, finally, critically assess the current status and fate of antiangiogenic therapy in this disease.
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Rubinow KB, Houston B, Wang S, Goodspeed L, Ogimoto K, Morton GJ, McCarty C, Braun RE, Page ST. Androgen receptor deficiency in monocytes/macrophages does not alter adiposity or glucose homeostasis in male mice. Asian J Androl 2019; 20:276-283. [PMID: 29205180 PMCID: PMC5952483 DOI: 10.4103/aja.aja_54_17] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Androgen deprivation in men leads to increased adiposity, but the mechanisms underlying androgen regulation of fat mass have not been fully defined. Androgen receptor (AR) is expressed in monocytes/macrophages, which are resident in key metabolic tissues and influence energy metabolism in surrounding cells. Male mice bearing a cell-specific knockout of the AR in monocytes/macrophages (M-ARKO) were generated to determine whether selective loss of androgen signaling in these cells would lead to altered body composition. Wild-type (WT) and M-ARKO mice (12–22 weeks of age, n = 12 per group) were maintained on a regular chow diet for 8 weeks and then switched to a high-fat diet for 8 additional weeks. At baseline and on both the regular chow and high-fat diets, no differences in lean mass or fat mass were observed between groups. Consistent with the absence of differential body weight or adiposity, no differences in food intake (3.0 ± 0.5 g per day for WT mice vs 2.8 ± 0.4 g per day for M-ARKO mice) or total energy expenditure (0.6 ± 0.1 Kcal h−1 for WT mice vs 0.5 ± 0.1 Kcal h−1 for M-ARKO mice) were evident between groups during high-fat feeding. Liver weight was greater in M-ARKO than that in WT mice (1.5 ± 0.1 g vs 1.3 ± 0.0 g, respectively, P = 0.02). Finally, M-ARKO mice did not exhibit impairments in glucose tolerance or insulin sensitivity relative to WT mice at any study time point. In aggregate, these findings suggest that AR signaling specifically in monocytes/macrophages does not contribute to the regulation of systemic energy balance, adiposity, or insulin sensitivity in male mice.
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Affiliation(s)
- Katya B Rubinow
- Division of Metabolism, Endocrinology, and Nutrition, Department of Medicine, University of Washington School of Medicine, Seattle, WA 98195, USA
| | - Barbara Houston
- Division of Metabolism, Endocrinology, and Nutrition, Department of Medicine, University of Washington School of Medicine, Seattle, WA 98195, USA
| | - Shari Wang
- Division of Metabolism, Endocrinology, and Nutrition, Department of Medicine, University of Washington School of Medicine, Seattle, WA 98195, USA
| | - Leela Goodspeed
- Division of Metabolism, Endocrinology, and Nutrition, Department of Medicine, University of Washington School of Medicine, Seattle, WA 98195, USA
| | - Kayoko Ogimoto
- Division of Metabolism, Endocrinology, and Nutrition, Department of Medicine, University of Washington School of Medicine, Seattle, WA 98195, USA
| | - Gregory J Morton
- Division of Metabolism, Endocrinology, and Nutrition, Department of Medicine, University of Washington School of Medicine, Seattle, WA 98195, USA
| | | | | | - Stephanie T Page
- Division of Metabolism, Endocrinology, and Nutrition, Department of Medicine, University of Washington School of Medicine, Seattle, WA 98195, USA
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SUMO-Specific Cysteine Protease 1 Promotes Epithelial Mesenchymal Transition of Prostate Cancer Cells via Regulating SMAD4 deSUMOylation. Int J Mol Sci 2017; 18:ijms18040808. [PMID: 28417919 PMCID: PMC5412392 DOI: 10.3390/ijms18040808] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 04/02/2017] [Accepted: 04/07/2017] [Indexed: 01/02/2023] Open
Abstract
In advanced prostate cancer, small ubiquitin-like modifier (SUMO)-specific cysteine protease 1 (SENP1) is up-regulated. However, the role of SENP1 in regulating deSUMOylation of TGF-β/SMADs signaling is unknown. In this study, we developed a lentiviral vector, PLKO.1-shSENP1, to silence SENP1 in prostate cancer cells with high metastatic characteristics (PC3M). Likewise, we also created an adenovirus vector, Ad5/F11p-SENP1 to over-express SENP1 in prostate cancer cells with low metastatic potential (LNCaP). We showed that silencing of SENP1 promoted cellular apoptosis, and inhibited proliferation and migration of PC3M cells. Moreover, SENP1 silencing increased the SMAD4 expression at protein level, up-regulated E-cadherin and down-regulated Vimentin expression, indicating the inhibition of epithelial mesenchymal transition (EMT). Furthermore, SMAD4 interference abolished SENP1-mediated up-regulation of E-cadherin, suggesting that SENP1 regulated E-cadherin expression via SMAD4. SENP1 over-expression in LNCaP cells reduced SMAD4 protein, and promoted EMT via decreasing E-cadherin and increasing Vimentin. Moreover, down-regulation of SMAD4 and E-cadherin were blocked, after transfection with two SUMOylation sites mutated SMAD4, suggesting that SENP1 might reduce SMAD4 levels to regulate E-cadherin expression via deSUMOylation of SMAD4. In conclusion, SENP1 deSUMOylated SMAD4 to promote EMT via up-regulating E-cadherin in prostate cancer cells. Therefore, SENP1 is a potential target for treatment of advanced prostate cancer.
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Rubinow KB. Estrogens and Body Weight Regulation in Men. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 1043:285-313. [PMID: 29224100 DOI: 10.1007/978-3-319-70178-3_14] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Our understanding of the metabolic roles of sex steroids in men has evolved substantially over recent decades. Whereas testosterone once was believed to contribute to metabolic risk in men, the importance of adequate androgen exposure for the maintenance of metabolic health has been demonstrated unequivocally. A growing body of evidence now also supports a critical role for estrogens in metabolic regulation in men. Recent data from clinical intervention studies indicate that estradiol may be a stronger determinant of adiposity than testosterone in men, and even short-term estradiol deprivation contributes to fat mass accrual. The following chapter will outline findings to date regarding the mechanisms, whereby estrogens contribute to the regulation of body weight and adiposity in men. It will present emergent clinical data as well as preclinical findings that reveal mechanistic insights into estrogen-mediated regulation of body composition. Findings in both males and females will be reviewed, to draw comparisons and to highlight knowledge gaps regarding estrogen action specifically in males. Finally, the clinical relevance of estrogen exposure in men will be discussed, particularly in the context of a rising global prevalence of obesity and expanding clinical use of sex steroid-based therapies in men.
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Affiliation(s)
- Katya B Rubinow
- Division of Metabolism, Endocrinology, and Nutrition Department of Medicine, University of Washington, Seattle, WA, USA.
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Hoda MR, Kramer MW, Merseburger AS, Cronauer MV. Androgen deprivation therapy with Leuprolide acetate for treatment of advanced prostate cancer. Expert Opin Pharmacother 2016; 18:105-113. [PMID: 27826989 DOI: 10.1080/14656566.2016.1258058] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
INTRODUCTION Hormone sensitive advanced prostate cancer (PCa) is an incurable disease that is treated with a variety of hormonal therapies targeting the androgen/androgen receptor signaling axis. For decades androgen deprivation therapy (ADT) by surgical or chemical castration is the gold standard for the treatment of advanced PCa. Areas covered: This review discusses the pharmacological features of Leuprolide, a luteinizing hormone-releasing hormone (LHRH) agonists/analog and the most commonly used drug in ADT. Expert opinion: Although Leuprolide has been on the market for more than 30 years it is still the leading option for ADT and serves as a basis for most multimodal therapy concepts. The fact that with the onset of castration-resistance in late stage metastatic disease, a prolongation of ADT in combination with a second line hormonal manipulation is recommended supports the importance of the compound for daily clinical practice.
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Affiliation(s)
- M Raschid Hoda
- a Department of Urology , University Clinic of Schleswig-Holstein , Lübeck , Germany
| | - Mario W Kramer
- a Department of Urology , University Clinic of Schleswig-Holstein , Lübeck , Germany
| | - Axel S Merseburger
- a Department of Urology , University Clinic of Schleswig-Holstein , Lübeck , Germany
| | - Marcus V Cronauer
- a Department of Urology , University Clinic of Schleswig-Holstein , Lübeck , Germany
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12
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Thirumalai A, Cooper LA, Rubinow KB, Amory JK, Lin DW, Wright JL, Marck BT, Matsumoto AM, Page ST. Stable Intraprostatic Dihydrotestosterone in Healthy Medically Castrate Men Treated With Exogenous Testosterone. J Clin Endocrinol Metab 2016; 101:2937-44. [PMID: 27172434 PMCID: PMC4929843 DOI: 10.1210/jc.2016-1483] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CONTEXT Concern exists that T replacement therapy (TRT) might increase the risk of prostate disease. There are limited data regarding the impact of TRT on prostate androgen concentrations. OBJECTIVE Determine the dose-dependent effects of exogenous T administration on intraprostatic androgen concentrations. DESIGN Twelve-week, double-blinded, randomized, placebo-controlled trial. SETTING Academic medical center. PARTICIPANTS Sixty-two healthy eugonadal men, aged 25-55 years. INTERVENTIONS Subjects were randomly assigned to receive injections of acyline, a GnRH antagonist (used to achieve medical castration), every 2 weeks plus transdermal T gel (1.25 g, 2.5 g, 5.0 g, 10 g, or 15 g daily), or placebo injections and transdermal gel for 12 weeks. MAIN OUTCOMES Serum T and dihydrotestosterone (DHT) were measured at baseline and every 2 weeks during treatment. Intraprostatic T and DHT concentrations were assessed from tissue obtained through ultrasound-guided prostate needle biopsies at week 12. Androgens were quantified by liquid chromatography-tandem mass spectrometry. RESULTS 51 men completed the study and were included in the analysis. There were no significant adverse events. Exogenous T resulted in a dose-dependent increase in serum T and DHT concentrations (190-770 and 60-180 ng/dL, respectively). Although intraprostatic T differed among dose groups (P = .01), intraprostatic DHT was comparable regardless of T dose (P = .11) and was 10- to 20-fold greater than intraprostatic T. CONCLUSIONS In healthy, medically castrate men receiving exogenous T, the total intraprostatic androgen concentration (predominantly DHT) remained stable across serum T concentrations within the physiological range. These findings further our knowledge of the relationship between serum and intraprostatic androgens and suggest that physiological serum T achieved by TRT is unlikely to alter the prostate hormonal milieu.
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MacLean DB, Shi H, Faessel HM, Saad F. Medical Castration Using the Investigational Oral GnRH Antagonist TAK-385 (Relugolix): Phase 1 Study in Healthy Males. J Clin Endocrinol Metab 2015; 100:4579-87. [PMID: 26502357 PMCID: PMC4667159 DOI: 10.1210/jc.2015-2770] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
CONTEXT TAK-385 is a highly selective, oral, nonpeptide GnRH antagonist being investigated as a possible prostate cancer treatment. OBJECTIVE The objectives were to evaluate safety, tolerability, pharmacokinetics, and pharmacodynamics of TAK-385 on LH and testosterone. DESIGN, SETTING, AND PARTICIPANTS This was a three-part, randomized, double-blind, placebo-controlled, phase 1 dose-escalation study in 176 healthy male UK volunteers. INTERVENTIONS Part 1, single doses of TAK-385 (0 [placebo], 80, 120, 180, or 360 mg). Part 2, 14-day TAK-385 (0, 20, 40, 80, or 180 mg) daily. Part 3, 28-day TAK-385 (40 [with loading dose], 60, 80, or 160 mg) or placebo daily. Parts 2 and 3 included men aged 40-75 years. MAIN OUTCOME MEASURES Main outcome measures included plasma concentrations of TAK-385, LH, and testosterone. RESULTS Oral TAK-385 was readily absorbed, and steady state was reached in ≤ 14 days. Food reduced TAK-385 systemic exposure by 47-52%. Mean serum testosterone levels declined ≤ 6 hours after TAK-385 administration. Loading doses up to 360 mg on day 1 or 360 mg on day 1 followed by 240 mg on day 2 reduced the time to achieve castrate testosterone levels from ≥ 7 to <3 days. TAK-385 doses ≥ 80 mg/d achieved sustained medical castration and trough TAK-385 concentrations >4 ng/mL. After discontinuation of TAK-385 on day 28, testosterone levels normalized in most subjects in ≤ 28 days. Common adverse events included bradycardia, headache, and hot flush (all grade ≤ 2). CONCLUSIONS Oral TAK-385 (40-180 mg/d) was well tolerated and effectively lowered testosterone in healthy men. Planned phase 2 doses in men with hormone-sensitive prostate cancer are 80 and 120 mg/d.
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Affiliation(s)
- David B MacLean
- Millennium Pharmaceuticals, Inc, a wholly owned subsidiary of Takeda Pharmaceutical Company Limited (D.B.M., H.S., H.F.), Cambridge, Massachusetts 02139; and University of Montreal Hospital Center (F.S.), Montreal, Québec, Canada H2X 0A9
| | - Hongliang Shi
- Millennium Pharmaceuticals, Inc, a wholly owned subsidiary of Takeda Pharmaceutical Company Limited (D.B.M., H.S., H.F.), Cambridge, Massachusetts 02139; and University of Montreal Hospital Center (F.S.), Montreal, Québec, Canada H2X 0A9
| | - Hélène M Faessel
- Millennium Pharmaceuticals, Inc, a wholly owned subsidiary of Takeda Pharmaceutical Company Limited (D.B.M., H.S., H.F.), Cambridge, Massachusetts 02139; and University of Montreal Hospital Center (F.S.), Montreal, Québec, Canada H2X 0A9
| | - Fred Saad
- Millennium Pharmaceuticals, Inc, a wholly owned subsidiary of Takeda Pharmaceutical Company Limited (D.B.M., H.S., H.F.), Cambridge, Massachusetts 02139; and University of Montreal Hospital Center (F.S.), Montreal, Québec, Canada H2X 0A9
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14
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Tian X, He Y, Zhou J. Progress in antiandrogen design targeting hormone binding pocket to circumvent mutation based resistance. Front Pharmacol 2015; 6:57. [PMID: 25852559 PMCID: PMC4371693 DOI: 10.3389/fphar.2015.00057] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Accepted: 03/05/2015] [Indexed: 12/30/2022] Open
Abstract
Androgen receptor (AR) plays a critical role in the development and progression of prostate cancer (PCa). Current clinically used antiandrogens such as flutamide, bicalutamide, and newly approved enzalutamide mainly target the hormone binding pocket (HBP) of AR. However, over time, drug resistance invariably develops and switches these antiandrogens from antagonist to agonist of the AR. Accumulated evidence indicates that AR mutation is an important cause for the drug resistance. This review will give an overview of the mutation based resistance of the current clinically used antiandrogens and the rational drug design to overcome the resistance, provides a promising strategy for the development of the new generation of antiandrogens targeting HBP.
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Affiliation(s)
- Xiaohong Tian
- Lady Davis Institute, Jewish General Hospital, Mcgill University Montreal, QC, Canada
| | - Yang He
- Immunology, Institute of Medicinal Biotechnology Chinese Academy of Medical Science Beijing, China
| | - Jinming Zhou
- Immunology, Institute of Medicinal Biotechnology Chinese Academy of Medical Science Beijing, China
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15
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Munoz J, Wheler JJ, Kurzrock R. Androgen receptors beyond prostate cancer: an old marker as a new target. Oncotarget 2015; 6:592-603. [PMID: 25595907 PMCID: PMC4359241 DOI: 10.18632/oncotarget.2831] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Accepted: 11/14/2014] [Indexed: 12/25/2022] Open
Abstract
Androgen receptors (ARs) play a critical role in the development of prostate cancer. Targeting ARs results in important salutary effects in this malignancy. Despite mounting evidence that ARs also participate in the pathogenesis and/or progression of diverse tumors, exploring the impact of hormonal manipulation of these receptors has not been widely pursued beyond prostate cancer. This review describes patterns of AR expression in a spectrum of cancers, and the potential to exploit this knowledge in the clinical therapeutic setting.
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Affiliation(s)
- Javier Munoz
- Hematology-Oncology, Banner MD Anderson Cancer Center, Gilbert, Arizona
| | - Jennifer J. Wheler
- Department of Investigational Cancer Therapeutics (Phase I Clinical Trials Program), The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Razelle Kurzrock
- Center for Personalized Cancer Therapy, Division and Hematology and Oncology, Moores Cancer Center, The University of California San Diego, La Jolla, California
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16
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Koong LY, Watson CS. Direct estradiol and diethylstilbestrol actions on early- versus late-stage prostate cancer cells. Prostate 2014; 74:1589-603. [PMID: 25213831 PMCID: PMC4205220 DOI: 10.1002/pros.22875] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 07/16/2014] [Indexed: 11/06/2022]
Abstract
BACKGROUND Diethylstilbestrol (DES) and other pharmaceutical estrogens have been used at ≥ µM concentrations to treat advanced prostate tumors, with successes primarily attributed to indirect hypothalamic-pituitary-testicular axis control mechanisms. However, estrogens also directly affect tumor cells, though the mechanisms involved are not well understood. METHODS LAPC-4 (androgen-dependent) and PC-3 (androgen-independent) cell viability was measured after estradiol (E2) or DES treatment across wide concentration ranges. We then examined multiple rapid signaling mechanisms at 0.1 nM E2 and 1 µM DES optima including levels of: activation (phosphorylation) for mitogen-activated protein kinases, cell-cycle proteins, and caspase 3, necroptosis, and reactive oxygen species (ROS). RESULTS LAPC-4 cells were more responsive than PC-3 cells. Robust and sustained extracellular-regulated kinase activation with E2 , but not DES, correlated with ROS generation and cell death. c-Jun N-terminal kinase was only activated in E2-treated PC-3 cells and was not correlated with caspase 3-mediated apoptosis; necroptosis was not involved. The cell-cycle inhibitor protein p16(INK4A) was phosphorylated in both cell lines by both E2 and DES, but to differing extents. In both cell types, both estrogens activated p38 kinase, which subsequently phosphorylated cyclin D1, tagging it for degradation, except in DES-treated PC-3 cells. CONCLUSIONS Cyclin D1 status correlated most closely with disrupted cell cycling as a cause of reduced cell numbers, though other mechanisms also contributed. As low as 0.1 nM E2 effectively elicited these mechanisms, and its use could dramatically improve outcomes for both early- and late-stage prostate cancer patients, while avoiding the side effects of high-dose DES treatment.
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Affiliation(s)
- Luke Y Koong
- Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch, Galveston, Texas
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17
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HEXIM1 plays a critical role in the inhibition of the androgen receptor by anti-androgens. Biochem J 2014; 462:315-27. [PMID: 24844355 DOI: 10.1042/bj20140174] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We show that HEXIM1 (hexamethylene bis-acetamide inducible 1) functions as an AR (androgen receptor) co-repressor as it physically interacts with the AR and is required for the ability of anti-androgens to inhibit androgen-induced target gene expression and cell proliferation. Oncomine™ database and IHC (immunohistochemistry) analyses of human prostate tissues revealed that expression of HEXIM1 mRNA and protein are down-regulated during the development and progression of prostate cancer. Enforced down-regulation of HEXIM1 in parental hormone-dependent LNCaP cells results in resistance to the inhibitory action of anti-androgens. Conversely, ectopic expression of HEXIM1 in the CRPC (castration-resistant prostate cancer) cell line, C4-2, enhances their sensitivity to the repressive effects of the anti-androgen bicalutamide. Novel insight into the mechanistic basis for HEXIM1 inhibition of AR activity is provided by the present studies showing that HEXIM1 induces expression of the histone demethylase KDM5B (lysine-specific demethylase 5B) and inhibits histone methylation, resulting in the inhibition of FOXA1 (forkhead box A1) licensing activity. This is a new mechanism of action attributed to HEXIM1, and distinct from what has been reported so far to be involved in HEXIM1 regulation of other nuclear hormone receptors, including the oestrogen receptor.
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18
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Cheung AS, Zajac JD, Grossmann M. Muscle and bone effects of androgen deprivation therapy: current and emerging therapies. Endocr Relat Cancer 2014; 21:R371-94. [PMID: 25056176 DOI: 10.1530/erc-14-0172] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Prostate cancer and treatment with androgen deprivation therapy (ADT) affect significant numbers of the male population. Endocrine effects of ADT are a critical consideration in balancing the benefits and risks of treatment on long-term survival and quality of life. This review highlights the latest advances in androgen manipulation in prostate cancer with an emphasis on the effects of ADT on muscle and bone, which universally affects the health and well-being of men undergoing ADT for prostate cancer. Muscle mass declines with ADT; however, the evidence that this correlates with a decrease in muscle strength or a decrease in physical performance is discordant. Cortical bone decay also occurs in association with an increase in fracture risk, hence optimization of musculoskeletal health in men undergoing ADT is crucial. The role of exercise, and current and emerging anabolic therapies for muscle as well as various new strategies to prevent loss of bone mass in men undergoing ADT are discussed. Future well-designed, prospective, controlled studies are required to elucidate the effects of ADT on physical performance, which are currently lacking, and larger randomized controlled trials are required to test the efficacy of medical therapies and exercise interventions to target proven deficits and to ensure safety in men with prostate cancer.
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Affiliation(s)
- Ada S Cheung
- Department of EndocrinologyAustin Health, Heidelberg, Victoria, AustraliaDepartment of Medicine (Austin Health)The University of Melbourne, 300 Waterdale Road, Heidelberg West, Victoria 3081, Australia Department of EndocrinologyAustin Health, Heidelberg, Victoria, AustraliaDepartment of Medicine (Austin Health)The University of Melbourne, 300 Waterdale Road, Heidelberg West, Victoria 3081, Australia
| | - Jeffrey D Zajac
- Department of EndocrinologyAustin Health, Heidelberg, Victoria, AustraliaDepartment of Medicine (Austin Health)The University of Melbourne, 300 Waterdale Road, Heidelberg West, Victoria 3081, Australia Department of EndocrinologyAustin Health, Heidelberg, Victoria, AustraliaDepartment of Medicine (Austin Health)The University of Melbourne, 300 Waterdale Road, Heidelberg West, Victoria 3081, Australia
| | - Mathis Grossmann
- Department of EndocrinologyAustin Health, Heidelberg, Victoria, AustraliaDepartment of Medicine (Austin Health)The University of Melbourne, 300 Waterdale Road, Heidelberg West, Victoria 3081, Australia Department of EndocrinologyAustin Health, Heidelberg, Victoria, AustraliaDepartment of Medicine (Austin Health)The University of Melbourne, 300 Waterdale Road, Heidelberg West, Victoria 3081, Australia
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19
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Calastretti A, Gatti G, Quaresmini C, Bevilacqua A. Down-modulation of Bcl-2 sensitizes PTEN-mutated prostate cancer cells to starvation and taxanes. Prostate 2014; 74:1411-22. [PMID: 25111376 DOI: 10.1002/pros.22857] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 06/17/2014] [Indexed: 12/19/2022]
Abstract
BACKGROUND The critical role of PTEN in regulating the PI3K/Akt/mTOR signaling pathway raises the possibility that targeting downstream effectors of the PI3K pathway, such as Bcl-2, might be an effective anti-proliferative strategy for PTEN-deficient prostate cancer cells. METHODS Four prostate cancer cell lines (LNCaP, PC3, DU145, 22Rv1) were assayed for their levels of total Akt and Ser473 phosphorylated Akt (p-Akt) by Western Blotting; their growth rates and sensitivity to different doses of paclitaxel were determined by cell counts after Trypan Blue dye exclusion assay. Cells were subjected to different combinations of starvation (growth factors and/or aminoacids withdrawal), paclitaxel treatment and Bcl-2 silencing by siRNA. Cell viability was evaluated by Trypan Blue dye exclusion assay, Propidium Iodide (PI) and Annexin-V/PI staining. RESULTS We assessed the sensitivity of different prostate cancer cell lines to starvation and we observed a differential response correlated to the levels of Akt activation. The four prostate cancer cell lines also showed different sensitivity to taxol treatments; LNCaP and 22Rv1 cells were more resistant to paclitaxel than DU145 and PC3 cells. Combining taxol with growth factors and aminoacids deprivation leaded to a more than additive reduction of cell viability compared to single treatments in PTEN-mutant LNCaP cells. Down-modulation of anti-apoptotic Bcl-2 protein by siRNA sensitized LNCaP cells to taxanes and starvation induced cell death. CONCLUSIONS Silencing Bcl-2 in PTEN-mutated prostate cancer cells enhances the apoptotic effects of combined starvation and taxol treatments, indicating that inhibition of Bcl-2 may be of significant value in PTEN-mutant tumor therapy.
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Affiliation(s)
- Angela Calastretti
- Department of Medical Biotechnology and Translational Medicine, Università degli Studi di Milano, Milan, Italy
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20
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Armandari I, Hamid AR, Verhaegh G, Schalken J. Intratumoral steroidogenesis in castration-resistant prostate cancer: a target for therapy. Prostate Int 2014; 2:105-13. [PMID: 25325021 PMCID: PMC4186953 DOI: 10.12954/pi.14063] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2014] [Accepted: 08/21/2014] [Indexed: 11/05/2022] Open
Abstract
Development of castration-resistant prostate cancer (CRPC) in a low androgen environment, arising from androgen deprivation therapy (ADT), is a major problem in patients with advanced prostate cancer (PCa). Several mechanisms have been hypothesized to explain the progression of PCa to CRPC during ADT, one of them is so called persistent intratumoral steroidogenesis. The existence of intratumoral steroidogenesis was hinted based on the residual levels of intraprostatic testosterone (T) and dihydrotestosterone (DHT) after ADT. Accumulating evidence has shown that the intraprostatic androgen levels after ADT are sufficient to induce cancer progression. Several studies now have demonstrated that PCa cells are able to produce T and DHT from different androgen precursors, such as cholesterol and the adrenal androgen, dehydroepiandrosterone (DHEA). Furthermore, up-regulation of genes encoding key steroidogenic enzymes in PCa cells seems to be an indicator for active intratumoral steroidogenesis in CRPC cells. Currently, several drugs are being developed targeting those steroidogenic enzymes, some of which are now in clinical trials or are being used as standard care for CRPC patients. In the future, novel agents that target steroidogenesis may add to the arsenal of drugs for CRPC therapy.
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Affiliation(s)
- Inna Armandari
- Department of Urology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Agus Rizal Hamid
- Department of Urology, Radboud University Medical Center, Nijmegen, The Netherlands ; Department of Urology, Ciptomangunkusumo Hospital, University of Indonesia Faculty of Medicine, Jakarta, Indonesia
| | - Gerald Verhaegh
- Department of Urology, Radboud University Medical Center, Nijmegen, The Netherlands ; Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
| | - Jack Schalken
- Department of Urology, Radboud University Medical Center, Nijmegen, The Netherlands ; Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
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21
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Neschadim A, Summerlee AJS, Silvertown JD. Targeting the relaxin hormonal pathway in prostate cancer. Int J Cancer 2014; 137:2287-95. [PMID: 25043063 DOI: 10.1002/ijc.29079] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2014] [Accepted: 07/07/2014] [Indexed: 11/11/2022]
Abstract
Targeting the androgen signalling pathway has long been the hallmark of anti-hormonal therapy for prostate cancer. However, development of androgen-independent prostate cancer is an inevitable outcome to therapies targeting this pathway, in part, owing to the shift from cancer dependence on androgen signalling for growth in favor of augmentation of other cellular pathways that provide proliferation-, survival- and angiogenesis-promoting signals. This review focuses on the role of the hormone relaxin in the development and progression of prostate cancer, prior to and after the onset of androgen independence, as well as its role in cancers of other reproductive tissues. As the body of literature expands, examining relaxin expression in cancerous tissues and its role in a growing number of in vitro and in vivo cancer models, our understanding of the important involvement of this hormone in cancer biology is becoming clearer. Specifically, the pleiotropic functions of relaxin affecting cell growth, angiogenesis, blood flow, cell migration and extracellular matrix remodeling are examined in the context of cancer progression. The interactions and intercepts of the intracellular signalling pathways of relaxin with the androgen pathway are explored in the context of progression of castration-resistant and androgen-independent prostate cancers. We provide an overview of current anti-hormonal therapeutic treatment options for prostate cancer and delve into therapeutic approaches and development of agents aimed at specifically antagonizing relaxin signalling to curb tumor growth. We also discuss the rationale and challenges utilizing such agents as novel anti-hormonals in the clinic, and their potential to supplement current therapeutic modalities.
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Affiliation(s)
- Anton Neschadim
- Armour Therapeutics Inc., Toronto, 124 Orchard View Blvd, Toronto, ON, Canada
| | | | - Joshua D Silvertown
- Armour Therapeutics Inc., Toronto, 124 Orchard View Blvd, Toronto, ON, Canada
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22
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Merriman JD, Von Ah D, Miaskowski C, Aouizerat BE. Proposed mechanisms for cancer- and treatment-related cognitive changes. Semin Oncol Nurs 2014; 29:260-9. [PMID: 24183157 DOI: 10.1016/j.soncn.2013.08.006] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
OBJECTIVES To review the proposed mechanisms of cognitive changes associated with non-central nervous system cancers and cancer treatment. DATA SOURCES Review and synthesis of databased publications and review articles. CONCLUSION Proposed mechanisms include cytokine upregulation, hormonal changes, neurotransmitter dysregulation, attentional fatigue, genetic predisposition, and comorbid symptoms. IMPLICATIONS FOR NURSING PRACTICE Oncology nurses need to understand the multiple mechanisms that may contribute to the development of cancer- and treatment-related cognitive changes so that they can identify patients at high risk and help patients understand why these changes occur.
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Yang YF, Xue SY, Lu ZZ, Xiao FJ, Yin Y, Zhang QW, Wu CT, Wang H, Wang LS. Antitumor effects of oncolytic adenovirus armed with PSA-IZ-CD40L fusion gene against prostate cancer. Gene Ther 2014; 21:723-31. [DOI: 10.1038/gt.2014.46] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Revised: 03/25/2014] [Accepted: 04/09/2014] [Indexed: 11/10/2022]
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Xu W, Zhang Z, Yang Y, Hu Z, Wang CH, Morgan M, Wu Y, Hutten R, Xiao X, Stock S, Guise T, Prabhakar BS, Brendler C, Seth P. Ad5/48 hexon oncolytic virus expressing sTGFβRIIFc produces reduced hepatic and systemic toxicities and inhibits prostate cancer bone metastases. Mol Ther 2014; 22:1504-1517. [PMID: 24791939 DOI: 10.1038/mt.2014.80] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Accepted: 04/24/2014] [Indexed: 01/17/2023] Open
Abstract
We are interested in developing oncolytic adenoviruses for the treatment of prostate cancer (PCa) bone metastases. A key limitation of Adenovirus 5 (Ad5) is that upon systemic administration, it produces major liver and systemic toxicities. To address this issue, a chimaeric Ad5/48 adenovirus mHAd.sTβRFc was created. Seven hypervariable regions of Ad5 hexon present in Ad5-based Ad.sTβRFc expressing soluble transforming growth factor beta receptor II-Fc fusion protein (sTGβRIIFc), were replaced by those of Ad48. mHAd.sTβRFc, like Ad.sTβRFc, was replication competent in the human PCa cells, and produced high levels of sTGβRIIFc expression. Compared to Ad.sTβRFc, the systemic delivery of mHAd.sTβRFc in nude mice resulted in much reduced systemic toxicity, and reduced liver sequestration. Ad.sTβRFc produced significant liver necrosis, and increases in alanine transaminase, aspartate transaminase, lactate dehydrogenase, tumor necrosis factor-α, and interleukin-6 levels, while mHAd.sTβRFc produced much reduced responses of these markers. Intravenous delivery of Ad.sTβRFc or mHAd.sTβRFc (5 × 10(10) viral particles/mouse) in nude mice bearing PC-3-luc PCa bone metastases produced inhibition of bone metastases. Moreover, a larger dose of the mHAd.sTβRFc (4 × 10(11) viral particles /mouse) was also effective in inhibiting bone metastases. Thus, mHAd.sTβRFc could be developed for the treatment of PCa bone metastases.
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Affiliation(s)
- Weidong Xu
- Gene Therapy Program, Department of Medicine, NorthShore Research Institute, Evanston, Illinois, USA
| | - Zhenwei Zhang
- Gene Therapy Program, Department of Medicine, NorthShore Research Institute, Evanston, Illinois, USA
| | - Yuefeng Yang
- Gene Therapy Program, Department of Medicine, NorthShore Research Institute, Evanston, Illinois, USA
| | - Zebin Hu
- Gene Therapy Program, Department of Medicine, NorthShore Research Institute, Evanston, Illinois, USA
| | - Chi-Hsiung Wang
- Gene Therapy Program, Department of Surgery, NorthShore Research Institute, Evanston, Illinois, USA
| | - Melanie Morgan
- Gene Therapy Program, Department of Pathology, NorthShore Research Institute, Evanston, Illinois, USA
| | - Ying Wu
- Image Processing Lab, Center for Advanced Imaging, Department of Radiology, NorthShore Research Institute, Evanston, Illinois, USA
| | - Ryan Hutten
- Image Processing Lab, Center for Advanced Imaging, Department of Radiology, NorthShore Research Institute, Evanston, Illinois, USA
| | - Xianghui Xiao
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois, USA
| | - Stuart Stock
- Department of Molecular Pharmacology and Biological Chemistry, Northwestern University, Chicago, Illinois, USA
| | - Theresa Guise
- Department of Medicine, Indiana University, Indianapolis, Indiana, USA
| | - Bellur S Prabhakar
- Department of Microbiology and Immunology, University of Illinois, Chicago, Illinois, USA
| | - Charles Brendler
- Gene Therapy Program, Department of Surgery, NorthShore Research Institute, Evanston, Illinois, USA
| | - Prem Seth
- Gene Therapy Program, Department of Medicine, NorthShore Research Institute, Evanston, Illinois, USA.
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Bennett LL, Ingason A. Enzalutamide (Xtandi) for patients with metastatic, resistant prostate cancer. Ann Pharmacother 2014; 48:530-7. [PMID: 24458946 DOI: 10.1177/1060028013518899] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
OBJECTIVE To review the pharmacology and pharmacokinetics, and to evaluate the clinical efficacy, safety, and place in therapy of enzalutamide for the treatment of castration-resistant prostate cancer (CRPC). DATA SOURCES A literature search through PubMed (1984 to November 2013; English language) was performed using the following keywords: MDV3100, androgen deprivation therapy, enzalutamide, CRPC, and androgen receptor antagonist. Searches were limited to published studies in humans. STUDY SELECTION AND DATA EXTRACTION All articles in English identified from reviews, abstracts, presentations, and clinical trials of enzalutamide in humans were selected and included. DATA SYNTHESIS Enzalutamide is an oral, nonsteroidal second-generation androgen receptor antagonist that is Food and Drug Administration-approved for the treatment of metastatic CRPC in men who were previously treated with docetaxel. Enzalutamide was superior to placebo for increasing median survival from 13.6 months to 18.4 months. Enzalutamide was well tolerated at a dose of 160 mg, with minor adverse events such as fatigue, diarrhea, musculoskeletal pain, and hot flashes. Patients with increased risk of seizure should not take enzalutamide. CONCLUSIONS Enzalutamide is effective to slow progression of metastatic CRPC, to reduce prostate-specific antigen (PSA) levels, to decrease time to progression of PSA, to increase time to first skeletal-related events, and to increase quality of response rate. Enzalutamide was given at 160 mg/d for a median of 8 cycles of administration. Clinical trials are currently being conducted to observe if enzalutamide will be useful for treatment of other cancers and for early administration in prostate cancer.
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Dong P, Jiang L, Liu J, Wu Z, Guo S, Zhang Z, Zhou F, Liu Z. Induction of paclitaxel resistance by ERα mediated prohibitin mitochondrial-nuclear shuttling. PLoS One 2013; 8:e83519. [PMID: 24376711 PMCID: PMC3871534 DOI: 10.1371/journal.pone.0083519] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2013] [Accepted: 11/05/2013] [Indexed: 11/30/2022] Open
Abstract
Paclitaxel is a drug within one of the most promising classes of anticancer agents. Unfortunately, clinical success of this drug has been limited by the insurgence of cellular resistance. To address this, Paclitaxel resistance was modeled in an in vitro system using estrogen treated prostate cancer cells. This study demonstrates that emerging resistance to clinically relevant doses of Paclitaxel is associated with 17-β-estradiol (E2) treatment in PC-3 cells, but not in LNCaP cells. We found that small interfering RNA mediated knockdown of ERα lead to a decrease in E2 induced Paclitaxel resistance in androgen-independent cells. We also showed that ERα mediated the effects of estrogen, thereby suppressing androgen-independent cell proliferation and mediating Paclitaxel resistance. Furthermore, E2 promoted Prohibitin (PHB) mitochondrial-nucleus translocation via directly mediation of ERα, leading to an inhibition of cellular proliferation by PHB. Additionally, restoration of Paclitaxel sensitivity by ERα knockdown could be overcome by PHB overexpression and, conversely, PHB knockdown decreased E2 induced Paclitaxel resistance. These findings demonstrate that PHB lies downstream of ERα and mediates estrogen-dependent Paclitaxel resistance signaling cascades.
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Affiliation(s)
- Pei Dong
- State Key Laboratory of Oncology in South China, Department of Urology, Sun Yat-sen University Cancer Center, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, China
- Guangdong Key Laboratory of Urology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Lijuan Jiang
- State Key Laboratory of Oncology in South China, Department of Urology, Sun Yat-sen University Cancer Center, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, China
| | - Jianye Liu
- State Key Laboratory of Oncology in South China, Department of Urology, Sun Yat-sen University Cancer Center, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, China
| | - Zhiming Wu
- State Key Laboratory of Oncology in South China, Department of Urology, Sun Yat-sen University Cancer Center, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, China
| | - Shengjie Guo
- State Key Laboratory of Oncology in South China, Department of Urology, Sun Yat-sen University Cancer Center, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, China
| | - Ziling Zhang
- State Key Laboratory of Oncology in South China, Department of Urology, Sun Yat-sen University Cancer Center, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, China
| | - Fangjian Zhou
- State Key Laboratory of Oncology in South China, Department of Urology, Sun Yat-sen University Cancer Center, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, China
| | - Zhuowei Liu
- State Key Laboratory of Oncology in South China, Department of Urology, Sun Yat-sen University Cancer Center, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, China
- * E-mail:
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Tunn UW, Gruca D, Bacher P. Six-month leuprorelin acetate depot formulations in advanced prostate cancer: a clinical evaluation. Clin Interv Aging 2013; 8:457-64. [PMID: 23637525 PMCID: PMC3639016 DOI: 10.2147/cia.s27931] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
For nearly three decades, gonadotropin-releasing hormone (GnRH) agonists, particularly leuprorelin acetate (LA), have served as an important part of the treatment armamentarium for prostate cancer. The introduction of LA depot formulations provided a significant improvement in the acceptance of this therapy; however, their indicated treatment duration of 1 to 4 months was still not long enough to satisfy all medical needs. For this reason some manufacturers developed new injectable formulations that provide testosterone suppression for 6 months. This review article assesses key publications in order to compare these long-acting, commercially available, LA depot formulations and their clinical performance. The literature search identified 14 publications; by excluding reviews, duplications, and non-English articles, only three original papers describing clinical trial remained for review: two focused on microsphere-based LA formulations with either a 30 mg or 45 mg dose and one focused on a gel-based leuprorelin acetate with a 45 mg dose. All products were tested in individual clinical trials and have demonstrated their efficacy and safety.
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Affiliation(s)
- Ulf W Tunn
- Urological Department, Prostate Center, Offenbach, Germany.
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Hu Z, Gupta J, Zhang Z, Gerseny H, Berg A, Chen YJ, Zhang Z, Du H, Brendler CB, Xiao X, Pienta KJ, Guise T, Lee C, Stern PH, Stock S, Seth P. Systemic delivery of oncolytic adenoviruses targeting transforming growth factor-β inhibits established bone metastasis in a prostate cancer mouse model. Hum Gene Ther 2012; 23:871-82. [PMID: 22551458 DOI: 10.1089/hum.2012.040] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
We have examined whether Ad.sTβRFc and TAd.sTβRFc, two oncolytic viruses expressing soluble transforming growth factor-β receptor II fused with human Fc (sTGFβRIIFc), can be developed to treat bone metastasis of prostate cancer. Incubation of PC-3 and DU-145 prostate tumor cells with Ad.sTβRFc and TAd.sTβRFc produced sTGFβRIIFc and viral replication; sTGFβRIIFc caused inhibition of TGF-β-mediated SMAD2 and SMAD3 phosphorylation. Ad(E1-).sTβRFc, an E1(-) adenovirus, produced sTGFβRIIFc but failed to replicate in tumor cells. To examine the antitumor response of adenoviral vectors, PC-3-luc cells were injected into the left heart ventricle of nude mice. On day 9, mice were subjected to whole-body bioluminescence imaging (BLI). Mice bearing hind-limb tumors were administered viral vectors via the tail vein on days 10, 13, and 17 (2.5×10(10) viral particles per injection per mouse, each injection in a 0.1-ml volume), and subjected to BLI and X-ray radiography weekly until day 53. Ad.sTβRFc, TAd.sTβRFc, and Ad(E1-).sTβRFc caused significant inhibition of tumor growth; however, Ad.sTβRFc was the most effective among all the vectors. Only Ad.sTβRFc and TAd.sTβRFc inhibited tumor-induced hypercalcemia. Histomorphometric and synchrotron micro-computed tomographic analysis of isolated bones indicated that Ad.sTβRFc induced significant reduction in tumor burden, osteoclast number, and trabecular and cortical bone destruction. These studies suggest that Ad.sTβRFc and TAd.sTβRFc can be developed as potential new therapies for prostate cancer bone metastasis.
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Affiliation(s)
- Zebin Hu
- Gene Therapy Program, Department of Medicine, NorthShore Research Institute, Evanston, IL 60201, USA
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