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Androgen deprivation therapy

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https://www.readbyqxmd.com/read/29153843/aberrant-activation-of-a-gastrointestinal-transcriptional-circuit-in-prostate-cancer-mediates-castration-resistance
#1
Shipra Shukla, Joanna Cyrta, Devan A Murphy, Edward G Walczak, Leili Ran, Praveen Agrawal, Yuanyuan Xie, Yuedan Chen, Shangqian Wang, Yu Zhan, Dan Li, Elissa W P Wong, Andrea Sboner, Himisha Beltran, Juan Miguel Mosquera, Jessica Sher, Zhen Cao, John Wongvipat, Richard P Koche, Anuradha Gopalan, Deyou Zheng, Mark A Rubin, Howard I Scher, Ping Chi, Yu Chen
Prostate cancer exhibits a lineage-specific dependence on androgen signaling. Castration resistance involves reactivation of androgen signaling or activation of alternative lineage programs to bypass androgen requirement. We describe an aberrant gastrointestinal-lineage transcriptome expressed in ∼5% of primary prostate cancer that is characterized by abbreviated response to androgen-deprivation therapy and in ∼30% of castration-resistant prostate cancer. This program is governed by a transcriptional circuit consisting of HNF4G and HNF1A...
November 3, 2017: Cancer Cell
https://www.readbyqxmd.com/read/29151782/salvage-low-dose-rate-brachytherapy-for-recurrent-prostate-cancer-after-external-beam-radiotherapy-results-from-a-single-institution-with-focus-on-toxicity-and-functional-outcomes
#2
F Barbera, L Triggiani, M Buglione, P Ghirardelli, P Vitali, B Caraffini, P Borghetti, D Greco, L Bardoscia, N Pasinetti, L Costa, M Maddalo, B Ghedi, B La Face, S M Magrini
Background/aim: Low dose rate brachytherapy has been used as salvage therapy for locally recurrent prostate cancer (PC) after primary external beam radiation therapy (EBRT), along with surgery and cryotherapy. All these techniques, in particular, when applied to the whole gland, involve a relatively high risk of toxicity and may worsen the patient's quality of life. Our aim is to evaluate the results of whole-gland salvage brachytherapy (SBT) after primary EBRT in terms of toxicity, functional outcomes, and efficacy...
2017: Clinical Medicine Insights. Oncology
https://www.readbyqxmd.com/read/29151227/significance-of-prostate-specific-antigen-kinetics-after-three-dimensional-conformal-radiotherapy-with-androgen-deprivation-therapy-in-patients-with-localized-prostate-cancer
#3
Wataru Fukuokaya, Sangji Kim, Takao Natsuyama, Kanako Matsuzaki, Homare Shiomi, Hiroki Kitoh, Nobuko Utsumi, Hiromasa Kurosaki, Masafumi Inoue, Koichiro Akakura
BACKGROUND: To evaluate the relationship between biochemical recurrence and post-radiation prostate-specific antigen (PSA) kinetics in patients with localized prostate cancer treated by radiotherapy with various durations of androgen deprivation therapy (ADT). METHODS: We reviewed our single-institution, retrospectively maintained data of 144 patients with T1c-T3N0M0 prostate cancer who underwent three-dimensional conformal radiotherapy (3D-CRT) between December 2005 and December 2015 and 113 patients were fulfilled the inclusion criteria...
November 18, 2017: International Journal of Clinical Oncology
https://www.readbyqxmd.com/read/29150010/androgen-deprivation-alters-attention-to-sexually-provocative-visual-stimuli-in-elderly-men
#4
Jaime L Palmer-Hague, Vivian Tsang, Charlenn Skead, Richard J Wassersug, Eleni Nasiopoulos, Alan Kingstone
INTRODUCTION: Testosterone is known to regulate male sexual interest, but the exact way that androgens influence men's sexual cognition remains unclear. AIM: To investigate the influence of androgen deprivation (AD) on visual responses to sexually suggestive stimuli in men treated for prostate cancer with AD therapy. METHODS: Patients with AD-treated prostate cancer, patients with prostate cancer not on AD therapy, and age-matched healthy control participants were exposed to images of male and female runway models fully or minimally clothed...
December 2017: Sexual Medicine
https://www.readbyqxmd.com/read/29145505/spontaneous-development-of-epstein-barr-virus-associated-human-lymphomas-in-a-prostate-cancer-xenograft-program
#5
Alberto J Taurozzi, Ramprakash Beekharry, Michelle Wantoch, Marie-Christine Labarthe, Hannah F Walker, Robert I Seed, Matthew Simms, Greta Rodrigues, James Bradford, Geertje van der Horst, Gabri van der Pluijm, Anne T Collins
Prostate cancer research is hampered by the lack of in vivo preclinical models that accurately reflect patient tumour biology and the clinical heterogeneity of human prostate cancer. To overcome these limitations we propagated and characterised a new collection of patient-derived prostate cancer xenografts. Tumour fragments from 147 unsupervised, surgical prostate samples were implanted subcutaneously into immunodeficient Rag2-/-γC-/- mice within 24 hours of surgery. Histologic and molecular characterisation of xenografts was compared with patient characteristics, including androgen-deprivation therapy, and exome sequencing...
2017: PloS One
https://www.readbyqxmd.com/read/29144946/re-associations-of-luminal-and-basal-subtyping-of-prostate-cancer-with-prognosis-and-response-to-androgen-deprivation-therapy
#6
Samir S Taneja
No abstract text is available yet for this article.
December 2017: Journal of Urology
https://www.readbyqxmd.com/read/29141691/involvement-of-aberrantly-activated-hotair-ezh2-mir-193a-feedback-loop-in-progression-of-prostate-cancer
#7
Zhixin Ling, Xiaoyan Wang, Tao Tao, Lei Zhang, Han Guan, Zonghao You, Kai Lu, Guangyuan Zhang, Shuqiu Chen, Jianping Wu, Jinke Qian, Hui Liu, Bin Xu, Ming Chen
BACKGROUND: Though androgen deprivation therapy is the standard treatment for prostate cancer (PCa), most patients would inevitably progress to castration-resistant prostate cancer (CRPC) which is the main cause of PCa death. Therefore, the identification of novel molecular mechanism regulating cancer progression and achievement of new insight into target therapy would be necessary for improving the benefits of PCa patients. This study aims to study the function and regulatory mechanism of HOTAIR/EZH2/miR-193a feedback loop in PCa progression...
November 15, 2017: Journal of Experimental & Clinical Cancer Research: CR
https://www.readbyqxmd.com/read/29137489/androgen-deprivation-therapy-for-the-treatment-of-prostate-cancer-a-focus-on-pharmacokinetics
#8
Charles F Polotti, Christopher J Kim, Nadiya Chuchvara, Alyssa B Polotti, Eric A Singer, Sammy Elsamra
Medical therapy has undergone many changes as our understanding of prostate cancer cell biology has improved. Androgen deprivation therapy (ADT) remains the mainstay of therapy for metastatic disease. Metastatic castrate-resistant prostate cancer (CRPC) is an important concern since we are unable to stop progression with currently available agents. Areas covered: Pharmacologic ADT is the most commonly used treatment for metastatic prostate cancer. Multiple agents are available for both first-line and second-line use: antiandrogens, estrogens, luteinizing hormone-releasing hormone agonists/antagonists, and CYP17 inhibitors...
November 15, 2017: Expert Opinion on Drug Metabolism & Toxicology
https://www.readbyqxmd.com/read/29134684/enhanced-radiosensitization-of-enzalutamide-via-schedule-dependent-administration-to-androgen-sensitive-prostate-cancer-cells
#9
Maryam Ghashghaei, Miltiadis Paliouras, Mitra Heravi, Hamed Bekerat, Mark Trifiro, Tamim M Niazi, Thierry Muanza
BACKGROUND: Prostate cancer (PCa) is a progressive disease and the most diagnosed cancer in men. The current standard of care for high-risk localized PCa is a combination of androgen deprivation therapy (ADT) and radiation (XRT). The majority of these patients however become resistant due to incomplete responses to ADT as a result of selective cells maintaining androgen receptor (AR) activity. Improvement can be made if increasing radiosensitivity is realized. Therefore, the aim of this study is to investigate the efficacy of the next-generation PCa drug Enzalutamide (ENZA), as a radiosensitizer in XRT therapy...
November 14, 2017: Prostate
https://www.readbyqxmd.com/read/29134654/pten-loss-and-activation-of-k-ras-and-%C3%AE-catenin-cooperate-to-accelerate-prostate-tumourigenesis
#10
Matthew T Jefferies, Adam C Cox, Boris Y Shorning, Valerie Meniel, David Griffiths, Howard G Kynaston, Matthew J Smalley, Alan R Clarke
Aberrant phosphoinositide 3-kinase (PI3K), mitogen-activated protein kinase (MAPK) and WNT signalling are emerging as key events in the multistep nature of prostate tumourigenesis and progression. Here, we report a compound prostate cancer murine model in which these signalling pathways cooperate to produce a more aggressive prostate cancer phenotype. Using Cre-LoxP technology and the probasin promoter, we combined the loss of Pten (Pten(fl/fl) ), to activate the PI3K signalling pathway, with either dominant stabilized β-catenin [Catnb(+/lox(ex3)) ] or activated K-RAS (K-Ras(+/V12) ) to aberrantly activate WNT and MAPK signalling, respectively...
December 2017: Journal of Pathology
https://www.readbyqxmd.com/read/29132644/delineating-sites-of-failure-following-post-prostatectomy-radiation-treatment-using-68-ga-psma-pet
#11
Keelan Byrne, Thomas Eade, Andrew Kneebone, Linxin Guo, Ed Hsiao, Geoff Schembri, Carolyn Kwong, Julia Hunter, Louise Emmett, George Hruby
PURPOSE: To identify sites of failure with (68)Ga-PSMA-PET (PSMA-PET) imaging in patients who have Biochemical Failure (BF) following post-prostatectomy radiotherapy. MATERIAL AND METHODS: Between June 2006 and January 2016, 409 men received post prostatectomy intensity modulated radiation treatment (IMRT) with protocolised planning. 310 patients received radiation treatment (RT) to the Prostate Fossa (PF) alone and 99 patients received RT to PF and pelvic lymphatics (PF + LN) usually in combination with androgen deprivation (AD) therapy...
November 10, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/29132550/cytoreductive-cryosurgery-in-patients-with-bone-metastatic-prostate-cancer-a-retrospective-analysis
#12
Ming-Xiong Sheng, Ling-Ling Wan, Chang-Ming Liu, Chun-Xiao Liu, Shu-Shang Chen
The current study is a retrospective analysis of 49 patients with bone metastatic prostate cancer: 26 receiving androgen deprivation therapy (ADT) alone versus 23 receiving cytoreductive cryosurgery of the primary tumor plus ADT treatment. Progression-free survival (PFS) was the primary outcome variable, and Cox proportional hazards regression analysis was used to identify predictors for PFS. The baseline characteristics were generally comparable between the 2 groups. Median follow-up time was 41 months (range 24-56) and 37 months (range 19-53) in ADT alone group and cryosurgery groups, respectively...
December 2017: Kaohsiung Journal of Medical Sciences
https://www.readbyqxmd.com/read/29128208/multi-institutional-evaluation-of-elective-nodal-irradiation-and-or-androgen-deprivation-therapy-with-postprostatectomy-salvage-radiotherapy-for-prostate-cancer
#13
Stephen J Ramey, Shree Agrawal, Matthew C Abramowitz, Drew Moghanaki, Thomas M Pisansky, Jason A Efstathiou, Jeff M Michalski, Daniel E Spratt, Jason W D Hearn, Bridget F Koontz, Stanley L Liauw, Alan Pollack, Mitchell S Anscher, Robert B Den, Kevin L Stephans, Anthony L Zietman, W Robert Lee, Andrew J Stephenson, Rahul D Tendulkar
BACKGROUND: Outcomes with postprostatectomy salvage radiation therapy (SRT) are not ideal. Little evidence exists regarding potential benefits of adding whole pelvic radiation therapy (WPRT) alone or in combination with androgen deprivation therapy (ADT). OBJECTIVE: To explore whether WPRT and/or ADT added to prostate bed radiation therapy (PBRT) improves freedom from biochemical failure (FFBF) or distant metastases (DM). DESIGN, SETTING, AND PARTICIPANTS: A database was compiled from 10 academic institutions of patients with postprostatectomy prostate-specific antigen (PSA) >0...
November 8, 2017: European Urology
https://www.readbyqxmd.com/read/29127531/impact-of-a-robotic-surgical-system-on-treatment-choice-for-men-with-clinically-organ-confined-prostate-cancer
#14
Takashi Kobayashi, Kent Kanao, Motoo Araki, Naoki Terada, Yasuyuki Kobayashi, Atsuro Sawada, Takahiro Inoue, Shin Ebara, Toyohiko Watanabe, Tomomi Kamba, Makoto Sumitomo, Yasutomo Nasu, Osamu Ogawa
BACKGROUND: Introducing a new surgical technology may affect behaviors and attitudes of patients and surgeons about clinical practice. Robot-assisted laparoscopic radical prostatectomy (RALP) was approved in 2012 in Japan. We investigated whether the introduction of this system affected the treatment of organ-confined prostate cancer (PCa) and the use of radical prostatectomy (RP). METHODS: We conducted a retrospective multicenter study on 718 patients with clinically determined organ-confined PCa treated at one of three Japanese academic institutions in 2011 (n = 338) or 2013 (n = 380)...
November 11, 2017: International Journal of Clinical Oncology
https://www.readbyqxmd.com/read/29126446/detection-level-and-pattern-of-positive-lesions-using-psma-pet-ct-for-staging-prior-to-radiation-therapy
#15
Nina-Sophie Schmidt-Hegemann, Wolfgang Peter Fendler, Alexander Buchner, Christian Stief, Paul Rogowski, Maximilian Niyazi, Chukwuka Eze, Minglun Li, Peter Bartenstein, Claus Belka, Ute Ganswindt
BACKGROUND: To determine the potential role of (68)Ga-PSMA positron emission tomography/computed tomography (PET/CT) in radiotherapy (RT) planning for prostate cancer (PCa). METHODS: One hundred twenty-nine patients (pts) with (68)Ga-PSMA PET/CT were retrospectively analysed. Potentially influencing factors (androgen deprivation therapy, amount of (68)Ga-PSMA-HBED-CC, PSA doubling time ≤/> 10 months, PSA before PET/CT, T-/N-category and Gleason score) were evaluated by logistic regression analysis...
November 10, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29126389/safety-and-efficacy-of-abiraterone-acetate-in-chemotherapy-naive-patients-with-metastatic-castration-resistant-prostate-cancer-an-italian-multicenter-real-life-study
#16
Luca Cindolo, Clara Natoli, Cosimo De Nunzio, Michele De Tursi, Maurizio Valeriani, Silvana Giacinti, Salvatore Micali, Mino Rizzo, Giampaolo Bianchi, Eugenio Martorana, Marcello Scarcia, Giuseppe Mario Ludovico, Pierluigi Bove, Anastasia Laudisi, Oscar Selvaggio, Giuseppe Carrieri, Maida Bada, Pietro Castellan, Stefano Boccasile, Pasquale Ditonno, Paolo Chiodini, Paolo Verze, Vincenzo Mirone, Luigi Schips
BACKGROUND: To evaluate the safety and efficacy of abiraterone acetate (AA) in the "real life" clinical practice for men with chemotherapy-naïve metastatic castration-resistant prostate. METHODS: A consecutive series of patients with mCRPC in 9 Italian tertiary centres treated with AA was collected. Demographics, clinical parameters, treatment outcomes and toxicity were recorded. The Brief Pain Inventory scale Q3 was tracked and patient treatment satisfaction was evaluated...
November 10, 2017: BMC Cancer
https://www.readbyqxmd.com/read/29124881/the-implications-of-baseline-bone-health-assessment-at-initiation-of-androgen-deprivation-therapy-for-prostate-cancer
#17
Peter S Kirk, Tudor Borza, Vahakn B Shahinian, Megan E V Caram, Danil V Makarov, Jeremy B Shelton, John T Leppert, Ryan M Blake, Jennifer A Davis, Brent K Hollenbeck, Anne Sales, Ted A Skolarus
OBJECTIVES: To assess bone density testing (BDT) use among prostate cancer survivors receiving ADT, and downstream implications for osteoporosis and fracture diagnoses as well as pharmacologic osteoporosis treatment in a national integrated delivery system. METHODS: We identified 17,017 men with prostate cancer who received any ADT between 2005 and 2014 using Veterans Health Administration cancer registry and administrative data. We identified claims for BDT within a 3-year period of ADT initiation...
November 10, 2017: BJU International
https://www.readbyqxmd.com/read/29124243/establishment-of-korean-prostate-cancer-database-by-the-korean-urological-oncology-society
#18
Hanjong Ahn, Hyung Jin Kim, Seong Soo Jeon, Cheol Kwak, Gyung Tak Sung, Tae Gyun Kwon, Jong Yeon Park, Sung Hyun Paick
Purpose: Despite the necessity, to date, no detailed database of prostate cancer, especially one that includes clinicopathological data, has been created in Korea. For that reason, the Korean Urological Oncology Society (KUOS) decided to create the Korean Prostate Cancer Database (KPCD). Materials and Methods: The KPCD program was introduced in 2010. After considering regional distribution, a total of 20 hospitals participated in the KPCD. The Database consists of 4 domains (demographic, pretreatment, treatment, and follow-up data) and 135 variables...
November 2017: Investigative and Clinical Urology
https://www.readbyqxmd.com/read/29123014/positron-emission-tomography-using-a-grpr-antagonist-68-ga-rm26-in-healthy-volunteers-and-prostate-cancer-patients
#19
Jingjing Zhang, Gang Niu, Xingrong Fan, Lixin Lang, Guozhu Hou, Libo Chen, Huanwen Wu, Zhaohui Zhu, Fang Li, Xiaoyuan Chen
This study was designed to study the safety, biodistribution, radiation dosimetry of a gastrin-releasing peptide receptor (GRPR) antagonist positron emission tomography (PET) tracer (68)Ga-RM26, to assess its clinical diagnostic value in prostate cancer patients, and to perform a direct comparison between GRPR antagonist (68)Ga-RM26 and agonist (68)Ga-BBN. Methods: Five healthy volunteers were enrolled to validate the safety of (68)Ga-RM26 and calculate dosimetry. A total of 28 patients with prostate cancer (17 newly diagnosed and 11 post therapy) were recruited with written informed consent...
November 9, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29118987/massive-adrenal-incidentalomas-and-late-diagnosis-of-congenital-adrenal-hyperplasia-in-prostate-cancer
#20
Xin Feng, Gregory Kline
In a 61-year-old Caucasian male with prostate cancer, leuprolide and bicalutamide failed to suppress the androgens. He presented to endocrinology with persistently normal testosterone and incidental massive (up to 18 cm) bilateral adrenal myelolipomas on CT scan. Blood test did not reveal metanephrine excess. The patient was noted to have short stature (151 cm) and primary infertility. Elementary school photographs demonstrated precocious puberty. Physical examination revealed palpable abdominal (adrenal) masses...
2017: Endocrinology, Diabetes & Metabolism Case Reports
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