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https://www.readbyqxmd.com/read/29332354/inhibition-of-telomerase-potentiates-enzalutamide-efficiency-of-androgen-sensitive-human-prostate-cancer-cells
#1
Karaca Kaan Gecgel, Mustafa Muduroglu, Suat Erdogan
PURPOSE: Androgen deprivation therapy (ADT) is one of the main strategies to treat prostate cancer (PCa) at various stages of its development. Androgen receptor (AR) antagonists such as enzalutamide are mainstay treatments for castration-sensitive prostate cancer. Though, a majority of patients initially respond to ADT, most will eventually progress to castrate-resistant, due to the development of different mutations on the AR. PCa cells express high telomerase activity, and there is a correlation between the total activity of telomerase and the Gleason score...
November 2017: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
https://www.readbyqxmd.com/read/29332211/testosterone-mediated-upregulation-of-delayed-rectifier-potassium-channel-in-cardiomyocytes-causes-abbreviation-of-qt-intervals-in-rats
#2
Kimiko Masuda, Hiroki Takanari, Masaki Morishima, FangFang Ma, Yan Wang, Naohiko Takahashi, Katsushige Ono
Men have shorter rate-corrected QT intervals (QTc) than women, especially at the period of adolescence or later. The aim of this study was to elucidate the long-term effects of testosterone on cardiac excitability parameters including electrocardiogram (ECG) and potassium channel current. Testosterone shortened QT intervals in ECG in castrated male rats, not immediately after, but on day 2 or later. Expression of Kv7.1 (KCNQ1) mRNA was significantly upregulated by testosterone in cardiomyocytes of male and female rats...
January 13, 2018: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/29331381/clinical-outcomes-of-first-line-abiraterone-acetate-or-enzalutamide-for-metastatic-castration-resistant-prostate-cancer-after-androgen-deprivation-therapy%C3%A2-docetaxel-or-adt-alone-for-metastatic-hormone-sensitive-prostate-cancer
#3
Edoardo Francini, Steven Yip, Shubidito Ahmed, Haocheng Li, Luke Ardolino, Carolyn P Evan, Marina Kaymakcalan, Grace K Shaw, Philip W Kantoff, Mary-Ellen Taplin, Nimira S Alimohamed, Anthony M Joshua, Daniel Y C Heng, Christopher J Sweeney
BACKGROUND: The CHAARTED (ChemoHormonal Therapy Versus Androgen Ablation Randomized Trial for Extensive Disease in Prostate Cancer) and STAMPEDE (Systemic Therapy in Advancing or Metastatic Prostate Cancer: Evaluation of Drug Efficacy) trials showed that the addition of docetaxel (D) to androgen deprivation therapy (ADT) prolonged longevity of men with metastatic hormone-sensitive prostate cancer (mHSPC). However, the impact of upfront D on subsequent therapies is still unexplored. As abiraterone acetate (AA) and enzalutamide (E) are the most commonly used first-line treatment for metastatic castration-resistant prostate cancer (mCRPC), we aimed to assess whether they maintained their efficacy after ADT+D versus ADT alone...
December 27, 2017: Clinical Genitourinary Cancer
https://www.readbyqxmd.com/read/29330943/epigenetic-markers-in-circulating-cell-free-dna-as-prognostic-markers-for-survival-of-castration-resistant-prostate-cancer-patients
#4
Rianne J Hendriks, Siebren Dijkstra, Frank P Smit, Johan Vandersmissen, Hendrik Van de Voorde, Peter F A Mulders, Inge M van Oort, Wim Van Criekinge, Jack A Schalken
BACKGROUND: Noninvasive biomarkers to guide personalized treatment for castration-resistant prostate cancer (CRPC) are needed. In this study, we analyzed hypermethylation patterns of two genes (GSTP1 and APC) in plasma cell-free DNA (cfDNA) of CRPC patients. The aim of this study was to analyze the cfDNA concentrations and levels of the epigenetic markers and to assess the value of these biomarkers for prognosis. METHODS: In this prospective study, patients were included before starting new treatment after developing CRPC...
January 12, 2018: Prostate
https://www.readbyqxmd.com/read/29330929/adipocytes-affect-castration-resistant-prostate-cancer-cells-to-develop-the-resistance-to-cytotoxic-action-of-nk-cells-with-alterations-of-pd-l1-nkg2d-ligand-levels-in-tumor-cells
#5
Lijun Xu, Mingjing Shen, Xiaodong Chen, Rongying Zhu, Dong-Rong Yang, Ying Tsai, Peter C Keng, Yuhchyau Chen, Soo Ok Lee
BACKGROUND: Obesity affects prostate cancer (PCa) progression, and the periprostatic adipose tissue adjacent to the prostate is considered a driving force of disease progression. Adipocytes are the main cell population in adipose tissues and their paracrine role contributes to PCa progression, however its implication in modulating immune reactions remains largely unknown. We investigated the adipocyte role in controlling the susceptibility of castration-resistant PCa (CRPC) cells to the cytotoxic action of natural killer (NK) cells...
January 12, 2018: Prostate
https://www.readbyqxmd.com/read/29330895/effect-of-local-scrotal-heating-on-the-expression-of-tight-junction-associated-molecule-occludin-in-boar-testes
#6
Z Zhang, X Fan, H Xi, R Ji, H Shen, A Shi, J He
The aim of this study was to determine whether local scrotal heating (42°C, for 1 hr) had an effect on the expression of tight junction (TJ)-associated molecule Occludin in boar testes. Adult boars (Landrace, n = 6) were used and randomly divided into two groups (n = 3 each). Three boars were given local scrotal exposure to 42°C for approximately 1 h with a home-made electric blanket of controlled temperature as local scrotal heating group, the other three boars received no heat treatment and were left at standard room temperature as control group...
January 12, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29327946/posttranscriptional-regulation-of-human-antigen-r-by-mir-133b-enhances-docetaxel-cytotoxicity-through-the-inhibition-of-atp-binding-cassette-subfamily-g-member-2-in-prostate-cancer-cells
#7
Hui Liu, Xiaolong Song, Junqing Hou, Zhenhua Zhao, Junkai Chang
Docetaxel (DTX)-based chemotherapy is a first-line therapy in patients with castration-resistant prostate cancer. However, development of DTX resistance remains a challenge in cancer treatment. miRNAs have been shown to be involved in drug resistance in tumors. Nevertheless, little is known about the function and detailed molecular mechanism of miR-133b in DTX resistance of prostate cancer cells. The current study showed that miR-133b was downregulated, while human antigen R (HuR) was upregulated in prostate cancer cells...
January 12, 2018: DNA and Cell Biology
https://www.readbyqxmd.com/read/29327812/hyper-acetylation-contributes-to-the-sensitivity-of-chemo-resistant-prostate-cancer-cells-to-histone-deacetylase-inhibitor-trichostatin-a
#8
Qingqing Xu, Xiaofei Liu, Shiqin Zhu, Xuelei Hu, Huanmin Niu, Xiulei Zhang, Deyu Zhu, Effat Un Nesa, Keli Tian, Huiqing Yuan
Therapeutic agents are urgently needed for treating metastatic castration-refractory prostate cancer (mCRPC) that is unresponsive to androgen deprivation and chemotherapy. Our screening assays demonstrated that chemotherapy-resistant prostate cancer (PCa) cells are more sensitive to HDAC inhibitors than paired sensitive PCa cells, as demonstrated by cell proliferation and apoptosis in vitro and in vivo. Kinetic study revealed that TSA-induced apoptosis was significantly dependent on enhanced transcription and protein synthesis in an early stage, which subsequently caused ER stress and apoptosis...
January 12, 2018: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29326358/targeted-alpha-therapy-of-mcrpc-with-225actinium-psma-617-swimmer-plot-analysis-suggests-efficacy-regarding-duration-of-tumor-control
#9
Clemens Kratochwil, Frank Bruchertseifer, Hendrik Rathke, Markus Hohenfellner, Frederik L Giesel, Uwe Haberkorn, Alfred Morgenstern
The aim of this evaluation is to identify first indicators regarding the efficacy of 225Ac-PSMA-617 therapy in a retrospectively analyzed group of patients. Methods: Forty patients with metastatic castration-resistant prostate cancer were selected for treatment with 3 cycles of 100 kBq/kgBW 225Ac-PSMA-617 in 2 months intervals. Prostate-specific antigen (PSA) and blood cell count were measured every 4 weeks. Prostate-specific membrane antigen (PSMA)-PET/CT or PSMA-SPECT/CT were used for baseline staging and imaging follow-up at month six...
January 11, 2018: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29326030/patient-reported-outcomes-following-abiraterone-acetate-plus-prednisone-added-to-androgen-deprivation-therapy-in-patients-with-newly-diagnosed-metastatic-castration-naive-prostate-cancer-latitude-an-international-randomised-phase-3-trial
#10
Kim N Chi, Andrew Protheroe, Alfredo Rodríguez-Antolín, Gaetano Facchini, Henrik Suttman, Nobuaki Matsubara, Zhangqun Ye, Bhumsuk Keam, Ronaldo Damião, Tracy Li, Kelly McQuarrie, Bin Jia, Peter De Porre, Jason Martin, Mary B Todd, Karim Fizazi
BACKGROUND: In the LATITUDE trial, addition of abiraterone acetate plus prednisone to androgen deprivation therapy (ADT) improved overall survival compared with placebos plus ADT in patients with newly diagnosed, high-risk, metastatic castration-naive prostate cancer. Understanding the effects of treatments on patient-reported outcomes (PROs) and health-related quality of life (HRQOL) is important for treatment decisions; therefore we aimed to analyse the effects of ADT plus abiraterone acetate and prednisone versus ADT plus placebos on PROs and HRQOL in patients in the LATITUDE study...
January 8, 2018: Lancet Oncology
https://www.readbyqxmd.com/read/29326027/considering-quantity-and-quality-of-life-in-metastatic-castration-naive-prostate-cancer
#11
David F Penson
No abstract text is available yet for this article.
January 8, 2018: Lancet Oncology
https://www.readbyqxmd.com/read/29325195/common-calcaneal-tenorrhaphy-revision-using-a-central-gastrocnemius-turnover-aponeurotic-flap-technique-in-a-cat
#12
Fabio Sangion, Filippo Cinti, Guido Pisani
A 5-year-old, male castrated, domestic short hair cat was referred to the authors' clinic because of wound dehiscence and exposure of tendon stumps after tenorrhaphy of the Achilles tendon. Surgical revision was done using an aponeurotic flap taken from the proximal stump of the Achilles tendon and sutured over the two tendon portions. This technique has been described in humans, but, to the authors' knowledge, this has not been reported in cats. Modified type II external fixation was used to maintain the tarsocrural joint in extension until tendon healing was confirmed ultrasonographically 35 days postoperatively...
January 2018: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/29324927/hematopoiesis-is-prognostic-for-toxicity-and-survival-of-223radium-treatment-in-patients-with-metastatic-castration-resistant-prostate-cancer
#13
A Leisser, M Nejabat, M Hartenbach, H Duan, S F Shariat, G Kramer, M Krainer, M Hacker, A R Haug
OBJECTIVE: We evaluated the impact of pre-therapeutic hematopoiesis on survival, hematotoxicity (HT) and number of 223Radium (223Ra) treatments in patients with metastatic castration-resistant prostate cancer. SUBJECTS AND METHOD: Hemoglobin-levels (Hb), the number of platelets (Plts), leukocytes (Leuk), and survival data were collected in 56 patients treated with 223Ra. Pre-therapeutic hematopoiesis as well as adverse events during and after therapy were scored (grade 0-4) according to the CTCAE recommendations...
September 2017: Hellenic Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/29323792/the-retinamide-vnlg-152-inhibits-ar-ar-v7-and-mnk-eif4esignaling-pathways-to-suppress-emt-and-castration-resistant-prostate-cancer-xenograft-growth
#14
Vidya P Ramamurthy, Senthilmurugan Ramalingam, Lalji K Gediya, Vincent C O Njar
VNLG-152, a lead novel retinamide (NR) shown to suppress growth and progression in genetically diverse PCa cells via inhibition of AR signaling and eIF4E translational machinery. Herein, we report therapeutic effects of VNLG-152 on castration resistant prostate cancer (CRPC) growth and metastatic phenotype in CRPC tumor xenograft model. Administration of VNLG-152 significantly and dose-dependently suppressed the growth of aggressive CWR22Rv1 tumors by 63.4% and 76.3% respectively (P = 0.001), vs. vehicle with no host toxicity...
January 11, 2018: FEBS Journal
https://www.readbyqxmd.com/read/29321277/intrathymic-deletion-of-il-7-reveals-a-contribution-of-the-bone-marrow-to-thymic-rebound-induced-by-androgen-blockade
#15
Pedro M Rodrigues, Ana R Ribeiro, Nicolas Serafini, Catarina Meireles, James P Di Santo, Nuno L Alves
Despite the well-documented effect of castration in thymic regeneration, the singular contribution of the bone marrow (BM) versus the thymus to this process remains unclear. The chief role of IL-7 in pre- and intrathymic stages of T lymphopoiesis led us to investigate the impact of disrupting this cytokine during thymic rebound induced by androgen blockade. We found that castration promoted thymopoiesis in young and aged wild-type mice. In contrast, only young germline IL-7-deficient (Il7-/- ) mice consistently augmented thymopoiesis after castration...
January 10, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29320333/prostate-specific-membrane-antigen-pet-clinical-utility-in-prostate-cancer-normal-patterns-pearls-and-pitfalls
#16
Michael S Hofman, Rodney J Hicks, Tobias Maurer, Matthias Eiber
Prostate-specific membrane antigen (PSMA) is a transmembrane glycoprotein that is overexpressed in prostate cancer. Radiolabeled small molecules that bind with high affinity to its active extracellular center have emerged as a potential new diagnostic standard of reference for prostate cancer, resulting in images with extraordinary tumor-to-background contrast. Currently, gallium 68 (68Ga)-PSMA-11 (or HBED-PSMA) is the most widely used radiotracer for PSMA positron emission tomography (PET)/computed tomography (CT) or PSMA PET/magnetic resonance (MR) imaging...
January 2018: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/29319449/management-and-closure-of-multiple-large-cutaneous-lesions-in-a-juvenile-cat-with-severe-acquired-skin-fragility-syndrome-secondary-to-iatrogenic-hyperadrenocorticism
#17
C Noël McKnight, Linda J Lew, David A Gamble
CASE DESCRIPTION A 13-month-old castrated male cat was evaluated for a large, spontaneously developed cutaneous laceration over the left scapular region. The cat had a history of severe gingivostomatitis, conjunctivitis, giardiasis, and feline herpesvirus infection and had received systemic glucocorticoid treatment for 7 weeks prior to evaluation. CLINICAL FINDINGS Physical examination revealed a 10 × 7-cm full-thickness cutaneous laceration over the left scapular region, extremely thin skin, crusts over the dorsal aspect of the neck and base of the skull, medially curling pinnae, and moderate gingivostomatitis...
January 15, 2018: Journal of the American Veterinary Medical Association
https://www.readbyqxmd.com/read/29319382/ctc-derived-ar-v7-detection-as-a-prognostic-and-predictive-biomarker-in-advanced-prostate-cancer
#18
Diogo A Bastos, Emmanuel S Antonarakis
Prostate cancer is a highly heterogeneous disease, with remarkably different prognosis across all stages. Increased circulating tumor cell (CTC) count (≥ 5) using the CellSearch assay has been identified as one of the markers that can be used to predict survival, with added value beyond currently available prognostic factors. Recently, androgen receptor splice variant 7 (AR-V7) detection has been associated with worse outcomes for patients with castration-resistant prostate cancer (CRPC) treated with novel androgen receptor-signaling (ARS) inhibitors such as abiraterone and enzalutamide but not taxane chemotherapies...
January 10, 2018: Expert Review of Molecular Diagnostics
https://www.readbyqxmd.com/read/29318908/cardiovascular-safety-of-abiraterone-acetate-in-metastatic-castration-resistant-prostate-cancer-patients-a-prospective-evaluation
#19
Veronica Prati, Fiorella Ruatta, Caterina Aversa, Angela Gernone, Danilo Galizia, Alessandro Bonzano, Sofia Torino, Imperia Nuzzolese, Laura Marandino, Massimo Aglietta, Cinzia Ortega
AIM: The aim of this study is to evaluate cardiotoxicity of abiraterone acetate (AA) in metastatic castration-resistant prostate cancer patients (pts) with cardiovascular comorbidities or coronary artery disease (CAD) risk factors. PATIENTS & METHODS: We prospectively analyzed pts receiving AA in order to evaluate correlations between cardiotoxicity onset and CAD risk factors or cardiovascular comorbidities. RESULTS: Eighty-seven pts were enrolled, with median treatment duration of 9 months (1-44)...
January 10, 2018: Future Oncology
https://www.readbyqxmd.com/read/29318740/risk-of-febrile-neutropenia-and-early-treatment-cessation-in-men-receiving-standard-and-dose-reduced-3-weekly-docetaxel-for-metastatic-castration-resistant-prostate-cancer
#20
Anis A Hamid, Kaspar Willson, Andrew D Vincent, Babak Tamjid, Margaret Lee, Alice Bergin, Chun Gan, Ainsley Campbell, Josephine Stewart, Carmel Pezaro, Ben Tran, Andrew J Weickhardt
BACKGROUND: Docetaxel is an effective therapy for metastatic castration-resistant prostate cancer (mCRPC); however, many patients experience febrile neutropenia (FN) and cease treatment early due to toxicity. It is not known whether lower dose (LD) q3-weekly docetaxel impacts toxicity or efficacy. METHODS: Multicenter retrospective study included 166 patients with mCRPC who received q3-weekly docetaxel between 2010 and 2015. Demographic, disease, chemotherapy (standard dose, SD>60 mg/m2 vs LD≤60 mg/m2 ) and toxicity data were collected...
January 10, 2018: Asia-Pacific Journal of Clinical Oncology
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