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https://www.readbyqxmd.com/read/28728221/-correlation-between-androgen-receptor-expression-and-surrogate-molecular-subtypes-in-invasive-breast-carcinoma
#1
X J Sun, K Zuo, S X Tang, H F Lu, R H Shui, B H Yu, X L Xu, Y F Cheng, X Y Tu, R Bi, W T Yang
Objective: To investigate androgen receptor(AR)expression in invasive breast carcinoma and the correlation with surrogate molecular breast carcinoma subtypes. Methods: Immunohistochemical staining of AR and other biomarkers was performed in a cohort of 870 cases of primary invasive breast carcinomas collected from August to December, 2016. The association of AR expression with different histological and surrogate molecular subtypes was analyzed. Results: The positive expression rate of AR in the immunohistochemistry-based surrogate subtypes was 96...
July 8, 2017: Zhonghua Bing Li Xue za Zhi Chinese Journal of Pathology
https://www.readbyqxmd.com/read/28725181/impact-of-proestrus-on-gene-expression-in-the-medial-preoptic-area-of-mice
#2
Csaba Vastagh, Zsolt Liposits
The antero-ventral periventricular zone (AVPV) and medial preoptic area (MPOA) have been recognized as gonadal hormone receptive regions of the rodent brain that-via wiring to gonadotropin-releasing hormone (GnRH) neurons-contribute to orchestration of the preovulatory GnRH surge. We hypothesized that neural genes regulating the induction of GnRH surge show altered expression in proestrus. Therefore, we compared the expression of 48 genes obtained from intact proestrous and metestrous mice, respectively, by quantitative real-time PCR (qPCR) method...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28724614/nuclear-mtor-acts-as-a-transcriptional-integrator-of-the-androgen-signaling-pathway-in-prostate-cancer
#3
Étienne Audet-Walsh, Catherine R Dufour, Tracey Yee, Fatima Z Zouanat, Ming Yan, Georges Kalloghlian, Mathieu Vernier, Maxime Caron, Guillaume Bourque, Eleonora Scarlata, Lucie Hamel, Fadi Brimo, Armen G Aprikian, Jacques Lapointe, Simone Chevalier, Vincent Giguère
Androgen receptor (AR) signaling reprograms cellular metabolism to support prostate cancer (PCa) growth and survival. Another key regulator of cellular metabolism is mTOR, a kinase found in diverse protein complexes and cellular localizations, including the nucleus. However, whether nuclear mTOR plays a role in PCa progression and participates in direct transcriptional cross-talk with the AR is unknown. Here, via the intersection of gene expression, genomic, and metabolic studies, we reveal the existence of a nuclear mTOR-AR transcriptional axis integral to the metabolic rewiring of PCa cells...
July 19, 2017: Genes & Development
https://www.readbyqxmd.com/read/28723656/inhibitor-of-h3k27-demethylase-jmjd3-utx-gsk-j4-is-a-potential-therapeutic-option-for-castration-resistant-prostate-cancer
#4
Viacheslav M Morozov, Ying Li, Matthew M Clowers, Alexander M Ishov
Androgen receptor (AR) mediates initiation and progression of prostate cancer (PCa); AR-driven transcription is activated by binding of androgens to the ligand-binding domain (LBD) of AR. Androgen ablation therapy offers only a temporary relief of locally advanced and metastatic PCa, and the disease eventually recurs as a lethal castration-resistant PCa (CRPC) as there is no effective treatment for CRPC patients. Thus, it is critical to identify novel targeted and combinatorial regimens for clinical management of CRPC...
July 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28723521/bone-scan-index-and-progression-free-survival-data-for-progressive-metastatic-castration-resistant-prostate-cancer-patients-who-received-odm-201-in-the-arades-multicentre-study
#5
Mariana Reza, Robert Jones, John Aspegren, Christophe Massard, Leena Mattila, Mika Mustonen, Per Wollmer, Elin Trägårdh, Eva Bondesson, Lars Edenbrandt, Karim Fizazi, Anders Bjartell
BACKGROUND: ODM-201, a new-generation androgen receptor inhibitor, has shown clinical efficacy in prostate cancer (PCa). Quantitative methods are needed to accurately assess changes in bone as a measurement of treatment response. The Bone Scan Index (BSI) reflects the percentage of skeletal mass a given tumour affects. OBJECTIVE: To evaluate the predictive value of the BSI in metastatic castration-resistant PCa (mCRPC) patients undergoing treatment with ODM-201...
December 2016: European Urology Focus
https://www.readbyqxmd.com/read/28723516/the-molecular-evolution-of-castration-resistant-prostate-cancer
#6
REVIEW
Yvonne Ceder, Anders Bjartell, Zoran Culig, Mark A Rubin, Scott Tomlins, Tapio Visakorpi
CONTEXT: Androgen deprivation therapy (ADT) is the backbone of treatment for advanced prostate cancer. However, castration-resistant prostate cancer (CRPC) nearly invariably develops through a range of different molecular mechanisms accompanied by progression to a more aggressive phenotype. OBJECTIVE: To understand the key molecular mechanisms leading to CRPC and the functional implications of this progression. Understanding molecular evolutionary mechanisms in CRPC is essential for the development of novel curative therapeutic approaches...
December 2016: European Urology Focus
https://www.readbyqxmd.com/read/28723515/understanding-mechanisms-of-resistance-in-metastatic-castration-resistant-prostate-cancer-the-role-of-the-androgen-receptor
#7
REVIEW
Derya Tilki, Edward M Schaeffer, Christopher P Evans
CONTEXT: After initiation of androgen deprivation therapy (ADT), most patients progress to castration-resistant prostate cancer (CRPC) within 2 or 3 yr. In the USA, approximately 67000 men are estimated to have metastatic CRPC. OBJECTIVE: To provide an overview of different mechanisms driving resistance to therapy in metastatic CRPC, with a focus on androgen receptor (AR)-dependent pathways. EVIDENCE ACQUISITION: A Medline search via PubMed was performed using the keywords metastatic castration resistant prostate cancer (mCRPC), castration-resistant, CRPC, prostate cancer, androgen resistance, hormone-refractory, hormone-independent, androgen receptor, and androgen receptor axis...
December 2016: European Urology Focus
https://www.readbyqxmd.com/read/28723513/the-natural-history-and-outcome-predictors-of-metastatic-castration-resistant-prostate-cancer
#8
REVIEW
Robert J van Soest, Jason A Efstathiou, Cora N Sternberg, Bertand Tombal
CONTEXT: Biomarkers for the treatment of metastatic castration-resistant prostate cancer (mCRPC) are urgently needed by clinicians to facilitate treatment decisions. OBJECTIVE: To review current prognostic and predictive biomarkers in mCRPC. EVIDENCE ACQUISITION: We performed a nonsystematic review of the literature from 2004 to August 2016 by searching in Medline. Cross-matching references were used to search for additional articles. We reviewed clinical research and review articles written in the English language...
December 2016: European Urology Focus
https://www.readbyqxmd.com/read/28722220/developing-new-targeting-strategy-for-androgen-receptor-variants-in-castration-resistant-prostate-cancer
#9
Bin Wang, U-Ging Lo, Kaijie Wu, Payal Kapur, Xiangyang Liu, Jun Huang, Wei Chen, Elizabeth Hernandez, John Santoyo, Shi-Hong Ma, Rey-Chen Pong, Dalin He, Yi-Qiang Cheng, Jer-Tsong Hsieh
The presence of androgen receptor variant 7 (AR-V7) variants becomes a significant hallmark of castration resistant prostate cancer (CRPC) relapsed from hormonal therapy and is associated with poor survival of CRPC patients because of lacking a ligand-binding domain. Currently, it still lacks an effective agent to target AR-V7 or AR-Vs in general. Here, we showed a novel class of agents (thailanstatins, TSTs, spliceostatin A analogs) can significantly suppress the expression of AR-V7 mRNA and protein but in a less extent on the full-length AR expression...
July 19, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28721808/molecular-tests-for-the-choice-of-cancer-therapy
#10
Anna P Sokolenko, Evgeny N Imyanitov
There are over a dozen of approved cancer drugs, whose administration is tailored to predictive laboratory tests. The examples include estrogen and progesterone receptor status determination for the use of endocrine therapy, HER2 assessment for the administration of HER2-targeting agents, EGFR and ALK gene testing for lung cancer treatment, BRAF analysis in melanoma, etc. While first predictive tests relied on relatively easy laboratory procedures, more recent developments require rather sophisticated assays...
July 19, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28720108/early-pregnancy-sex-steroids-during-primiparous-pregnancies-and-maternal-breast-cancer-a-nested-case-control-study-in-the-northern-sweden-maternity-cohort
#11
Renée T Fortner, Eglé Tolockiene, Helena Schock, Husam Oda, Hans-Åke Lakso, Göran Hallmans, Rudolf Kaaks, Paolo Toniolo, Anne Zeleniuch-Jacquotte, Kjell Grankvist, Eva Lundin
BACKGROUND: Pregnancy and parity are associated with subsequent breast cancer risk. Experimental and epidemiologic data suggest a role for pregnancy sex steroid hormones. METHODS: We conducted a nested case-control study in the Northern Sweden Maternity Cohort (1975-2007). Eligible women had provided a blood sample in the first 20 weeks of gestation during a primiparous pregnancy leading to a term delivery. The current study includes 223 cases and 417 matched controls (matching factors: age at and date of blood collection)...
July 18, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/28719635/differential-protein-expression-profile-in-the-hypothalamic-gt1-7-cell-line-after-exposure-to-anabolic-androgenic-steroids
#12
Freddyson J Martínez-Rivera, Juliana Pérez-Laspiur, María E Santiago-Gascot, Abner G Alemán-Reyes, Emanuel García-Santiago, Yolanda Rodríguez-Pérez, Cristhian Calo-Guadalupe, Inelia Otero-Pagán, Roxsana N Ayala-Pagán, Magdiel Martínez, Yisel M Cantres-Rosario, Loyda M Meléndez, Jennifer L Barreto-Estrada
The abuse of anabolic androgenic steroids (AAS) has been considered a major public health problem during decades. Supraphysiological doses of AAS may lead to a variety of neuroendocrine problems. Precisely, the hypothalamic-pituitary-gonadal (HPG) axis is one of the body systems that is mainly influenced by steroidal hormones. Fluctuations of the hormonal milieu result in alterations of reproductive function, which are made through changes in hypothalamic neurons expressing gonadotropin-releasing hormone (GnRH)...
2017: PloS One
https://www.readbyqxmd.com/read/28718667/hydroxytyrosol-induces-apoptosis-and-cell-cycle-arrest-and-suppresses-multiple-oncogenic-signaling-pathways-in-prostate-cancer-cells
#13
Haseeb Zubair, Arun Bhardwaj, Aamir Ahmad, Sanjeev Kumar Srivastava, Mohammad Aslam Khan, Girijesh Kumar Patel, Seema Singh, Ajay Partap Singh
SCOPE: Hydroxytyrosol (HT), a polyphenol from olives, is a potential anticancer agent. This study was designed to evaluate the anticancer activity of HT against prostate cancer cells, and the mechanism thereof. METHODS AND RESULTS: Treatment of LNCaP and C4-2 prostate cancer cells with HT resulted in a dose-dependent inhibition of proliferation. This was in contrast to HT's ineffectiveness against normal prostate epithelial cells RWPE1 and PWLE2, suggesting cancer-cell-specific effect...
July 18, 2017: Nutrition and Cancer
https://www.readbyqxmd.com/read/28717648/response-detection-of-castrate-resistant-prostate-cancer-to-clinically-utilised-and-novel-treatments-by-monitoring-phospholipid-metabolism
#14
Tim A D Smith, Su M Phyu, Kholoud S Alzyoud, Chih-Chung Tseng
Androgen receptor (AR) activation is the primary driving factor in prostate cancer which is initially responsive to castration but then becomes resistant (castration-resistant prostate cancer (CRPC)). CRPC cells still retain the functioning AR which can be targeted by other therapies. A recent promising development is the use of inhibitors (Epi-1) of protein-protein interaction to inhibit AR-activated signalling. Translating novel therapies into the clinic requires sensitive early response indicators. Here potential response markers are explored...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28717350/properties-of-native-high-density-lipoproteins-inspire-synthesis-of-actively-targeted-in-vivo-sirna-delivery-vehicles
#15
Kaylin M McMahon, Michael P Plebanek, C Shad Thaxton
Efficient systemic administration of therapeutic short interfering RNA (siRNA) is challenging. High-density lipoproteins (HDL) are natural in vivo RNA delivery vehicles. Specifically, native HDLs: 1) Load single-stranded RNA; 2) Are anionic, which requires charge reconciliation between the RNA and HDL, and 3) Actively target scavenger receptor type B-1 (SR-B1) to deliver RNA. Emphasizing these particular parameters, we employed templated lipoprotein particles (TLP), mimics of spherical HDLs, and self-assembled them with single-stranded complements of, presumably, any highly unmodified siRNA duplex pair after formulation with a cationic lipid...
November 15, 2016: Advanced Functional Materials
https://www.readbyqxmd.com/read/28717268/empiric-medical-therapy-with-hormonal-agents-for-idiopathic-male-infertility
#16
REVIEW
Nicholas N Tadros, Edmund S Sabanegh
INTRODUCTION: Infertility affects approximately 15% of all couples, and male factor contribute to up to 50% of cases. Unfortunately, the cause of male infertility is unknown in about 30% of these cases. Infertility of unknown origin is classified as idiopathic male infertility when abnormal semen parameters are present. Despite not having a definable cause, these men may respond to treatment. This review focuses on the use of empiric hormonal therapies for idiopathic male infertility...
July 2017: Indian Journal of Urology: IJU: Journal of the Urological Society of India
https://www.readbyqxmd.com/read/28714392/natural-steroids-and-androgen-antagonists-used-as-neuroprotectives-in-common-neurological-disorders
#17
David Calderon Guzman, Hugo Juarez Olguin, Ernestina Hernandez Garcia, Monica Punzo Soto, Mayra Santillan Garcia, Gerardo Barragan Mejia
Multiple classes of natural products, such as antiandrogens or steroids have been used as antioxidants and anti-inflammatory treatments in neurodegenerative diseases. This paper aims to review current knowledge on these substances and their possible relationship with free radicals as an alternative therapy and prevention of common neurological disorders. An exhaustive review of the neurochemical mechanisms of these substances in the central nervous system of humans and animal models has yet to be undertaken in the literature, particularly regarding their importance and increasing use...
July 14, 2017: CNS & Neurological Disorders Drug Targets
https://www.readbyqxmd.com/read/28711501/comparing-the-androgenic-and-estrogenic-properties-of-progestins-used-in-contraception-and-hormone-therapy
#18
Renate Louw-du Toit, Meghan S Perkins, Janet P Hapgood, Donita Africander
Progestins used in endocrine therapies bind to multiple steroid receptors and are associated with several side-effects. It is thus important to understand the relationship between steroid receptor cross-reactivity and the side-effect profile of progestins. In cell lines that express negligible levels of steroid receptors, we report for the first time the binding affinities, potencies and efficacies of selected progestins from different generations determined in parallel. We show that the progestins bind to the androgen receptor (AR) with similar affinities to each other and progesterone, while none bind estrogen receptor (ER)-β, and only norethisterone acetate, levonorgestrel and gestodene bind ERα...
July 12, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28708672/artemisinin-disrupts-androgen-responsiveness-of-human-prostate-cancer-cells-by-stimulating-the-26s-proteasome-mediated-degradation-of-the-androgen-receptor-protein
#19
Andrea M Steely, Jamin A Willoughby, Shyam N Sundar, Vasiliki I Aivaliotis, Gary L Firestone
Androgen receptor (AR) expression and activity is highly linked to the development and progression of prostate cancer and is a target of therapeutic strategies for this disease. We investigated whether the antimalarial drug artemisinin, which is a sesquiterpene lactone isolated from the sweet wormwood plant Artemisia annua, could alter AR expression and responsiveness in cultured human prostate cancer cell lines. Artemisinin treatment induced the 26S proteasome-mediated degradation of the receptor protein, without altering AR transcript levels, in androgen-responsive LNCaP prostate cancer cells or PC-3 prostate cancer cells expressing exogenous wild-type AR...
July 13, 2017: Anti-cancer Drugs
https://www.readbyqxmd.com/read/28707844/castration-resistance-prostate-cancer-what-is-in-the-pipeline
#20
Cosimo DE Nunzio, Fabrizio Presicce, Silvana Giacinti, Maria Bassanelli, Andrea Tubaro
INTRODUCTION: To evaluate the available evidence on the standard diagnosis and management of men with metastatic castration resistant prostate cancer (mCRPC), and providing the timely update on new pharmacological treatments. EVIDENCE ACQUISITION: A systematic literature search from from January 2000 until March 2017 was performed by combining the following MESH terms: castrate resistant prostate cancer, abiraterone, enzalutamide, 223radium, sipuleucel-T, docetaxel, cabazitaxel, resistance mechanisms, resistance to androgen deprivation, Androgen Receptor (AR) mutations, amplifications, splice variants, and AR alterations...
July 12, 2017: Minerva Urologica e Nefrologica, the Italian Journal of Urology and Nephrology
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