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https://www.readbyqxmd.com/read/29763383/eb-2017-article-soy-protein-isolate-feeding-does-not-result-in-reproductive-toxicity-in-the-pre-pubertal-rat-testis
#1
Martin Jj Ronis, Horacio Gomez-Acevedo, Kartik Shankar, Neha Sharma, Michael Blackburn, Rohit Singhal, Kelly E Mercer, Thomas M Badger
The isoflavone phytoestrogens found in the soy protein isolate used in soy infant formulas have been shown to have estrogenic actions in the developing male reproductive tract resulting in reproductive toxicity. However, few studies have examined potential estrogenicity of soy protein isolate as opposed to that of pure isoflavones. In this study, we fed weanling male Sprague-Dawley rats a semi-purified diet with casein or soy protein isolate as the sole protein source from postnatal day 21 to 33. Additional groups were fed casein or soy protein isolate and treated s...
May 2018: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/29760165/the-impact-of-transcription-on-metabolism-in-prostate-and-breast-cancers
#2
Ninu Poulose, Ian G Mills, Rebecca E Steele
Metabolic dysregulation is regarded as an important driver in cancer development and progression. The impact of transcriptional changes on metabolism have been intensively studied in hormone-dependent cancers, and in particular in prostate and breast cancer. These cancers have strong similarities in the function of important transcriptional drivers, such as the estrogen and androgen receptor, at the level of dietary risk and epidemiology, genetics and therapeutically. In this review we will focus on the function of these nuclear hormone receptors and their downstream impact on metabolism, with a particular focus on lipid metabolism...
May 14, 2018: Endocrine-related Cancer
https://www.readbyqxmd.com/read/29754847/feasibility-of-classification-of-triple-negative-breast-cancer-by-immunohistochemical-surrogate-markers
#3
Sewha Kim, Byung-In Moon, Woosung Lim, Sanghui Park, Min Sun Cho, Sun Hee Sung
INTRODUCTION: Recently, Burstein et al identified 4 stable molecular subtypes of triple negative breast cancer (TNBC) by mRNA profiling: luminal androgen receptor (LAR), mesenchymal (MES), basal-like immune-activated (BLIA), and basal-like immune-suppressive (BLIS) types. The purpose of this study was to assess the feasibility of immunohistochemistry (IHC) surrogate panel in classifying the TNBC molecular subtypes using a large cohort of TNBC retrieved from a single institution. MATERIALS AND METHODS: IHC for androgen receptor [AR], claudin-3, E-cadherin, cytokeratin 5/6 [CK5/6], epidermal growth factor receptor [EGFR], indoleamine 2,3-dioxygenase 1 [IDO1], and Forkhead box C1 [FOXC1] were performed using the tissue microarray constructed from 200 TNBC samples...
March 23, 2018: Clinical Breast Cancer
https://www.readbyqxmd.com/read/29752333/the-endocrinology-of-male-breast-cancer
#4
REVIEW
Ian S Fentiman
Male breast cancer (MBC) is a rare disease but, as a result of epidemiological collaborations, there is now greater clarity concerning endocrine risk factors. The significant rise in global age-standardised mean BMI in men is likely to lead to increases in incidence of maturity-onset diabetes and MBC. The metabolic changes accompanying obesity decrease androgens and sex hormone-binding globulin (SHBG), thereby increasing available oestrogens. The higher rates of MBC in North and Equatorial Africa are largely due to liver damage from endemic bilharziasis and hepatitis B causing elevated oestradiol (E2 ) levels from hepatic conversion of androgen...
June 2018: Endocrine-related Cancer
https://www.readbyqxmd.com/read/29744674/phase-1-study-of-seviteronel-a-selective-cyp17-lyase-and-androgen-receptor-inhibitor-in-women-with-estrogen-receptor-positive-or-triple-negative-breast-cancer
#5
Aditya Bardia, Ayca Gucalp, Noashir DaCosta, Nashat Gabrail, Michael Danso, Haythem Ali, Kimberly L Blackwell, Lisa A Carey, Joel R Eisner, Edwina S Baskin-Bey, Tiffany A Traina
PURPOSE: Seviteronel (INO-464) is an oral, selective cytochrome P450c17a (CYP17) 17,20-lyase (lyase) and androgen receptor inhibitor with in vitro and in vivo anti-tumor activity. This open-label phase 1 clinical study evaluated safety, tolerability, pharmacokinetics (PK), and activity of once-daily (QD) seviteronel in women with locally advanced or metastatic TNBC or ER+ breast cancer. METHODS: Seviteronel was administered in de-escalating 750, 600, and 450 mg QD 6-subject cohorts...
May 9, 2018: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/29727695/clonality-analysis-of-multifocal-ipsilateral-breast-carcinomas-using-x-chromosome-inactivation-patterns
#6
Hayeon Kim, Chung-Yeul Kim, Kyong Hwa Park, Aeree Kim
The definition of multifocal breast cancer is ambiguous, and its incidence varies depending on the definition and detection methods. Multifocal breast cancers either have the same clonal origin or arise from completely distinct progenitor cells. The current American Joint Committee on Cancer Staging system and College of American Pathologists breast tumor guidelines state that only the largest tumor needs to be staged and studied immunohistochemically, on the assumption that they are of the same origin. However, some multifocal tumors have been proven to have arisen from different clones...
May 1, 2018: Human Pathology
https://www.readbyqxmd.com/read/29721213/anabolic-androgenic-steroids-and-carcinogenicity-focusing-on-leydig-cell-a-literature-review
#7
REVIEW
Monica Salerno, Orazio Cascio, Giuseppe Bertozzi, Francesco Sessa, Antonietta Messina, Vincenzo Monda, Luigi Cipolloni, Antonio Biondi, Aurora Daniele, Cristoforo Pomara
Anabolic androgenic steroids (AAS) are some of the most common drugs used among athletes, frequently in combination with resistance training, to improve physical performance or for aesthetic purpose. A great number of scientific reports showed the detrimental effects of anabolic androgenic steroids on different organs and tissues. In this literature review, we analyzed the AAS-mediated carcinogenicity, focusing on Leydig cell tumor. AAS-induced carcinogenicity can affect DNA transcription through two pathways...
April 10, 2018: Oncotarget
https://www.readbyqxmd.com/read/29719441/aromatase-inhibitors-in-premenopausal-women-with-breast-cancer-the-state-of-the-art-and-future-prospects
#8
REVIEW
M Pistelli, A Della Mora, Z Ballatore, R Berardi
Approximately 11% of patients with breast cancer (bca) are diagnosed before menopause, and because in most of those patients the tumour expresses a hormone receptor, treatment with endocrine interventions can be applied in any setting of disease (early or advanced). In the past, hormonal treatment consisted only of the estrogen receptor modulator tamoxifen, associated with luteinizing hormone-releasing hormone (lhrh); more recently, aromatase inhibitors (ais) have come into widespread use. The ais interfere with the last enzymatic step of estrogen synthesis in which androgens are converted into estrogens...
April 2018: Current Oncology
https://www.readbyqxmd.com/read/29713287/transcriptional-repression-and-protein-degradation-of-the-ca-2-activated-k-channel-k-ca-1-1-by-androgen-receptor-inhibition-in-human-breast-cancer-cells
#9
Anowara Khatun, Motoki Shimozawa, Hiroaki Kito, Mayu Kawaguchi, Mayu Fujimoto, Moe Ri, Junko Kajikuri, Satomi Niwa, Masanori Fujii, Susumu Ohya
The large-conductance Ca2+ -activated K+ channel KCa 1.1 plays an important role in the promotion of breast cancer cell proliferation and metastasis. The androgen receptor (AR) is proposed as a therapeutic target for AR-positive advanced triple-negative breast cancer. We herein investigated the effects of a treatment with antiandrogens on the functional activity, activation kinetics, transcriptional expression, and protein degradation of KCa 1.1 in human breast cancer MDA-MB-453 cells using real-time PCR, Western blotting, voltage-sensitive dye imaging, and whole-cell patch clamp recording...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29707142/-pik3ca-mutation-reduced-akt-serine-473-phosphorylation-and-increased-er%C3%AE-serine-167-phosphorylation-are-positive-prognostic-indicators-in-postmenopausal-estrogen-receptor-positive-early-breast-cancer
#10
Naoko Ishida, Motoi Baba, Yutaka Hatanaka, Kanako Hagio, Hiromi Okada, Kanako C Hatanaka, Kenichi Togashi, Yoshihiro Matsuno, Hiroko Yamashita
Although endocrine therapy is the most important treatment option in estrogen receptor (ER)-positive breast cancer, new strategies, such as molecular targeted agents together with endocrine therapy are required to improve survival. PIK3CA is the most frequent mutated gene in ER-positive early breast cancers, and PIK3CA mutation status is reported to affect activation of AKT and ERα. Moreover, recent studies demonstrate that patients had a better prognosis when tumors expressed ER, androgen receptor (AR), and vitamin D receptor (VDR)...
April 3, 2018: Oncotarget
https://www.readbyqxmd.com/read/29707132/molecular-profiling-of-advanced-breast-cancer-tumors-is-beneficial-in-assisting-clinical-treatment-plans
#11
Philip Carter, Costi Alifrangis, Biancastella Cereser, Pramodh Chandrasinghe, Lisa Del Bel Belluz, Nina Moderau, Fotini Poyia, Lee S Schwartzberg, Neha Tabassum, Jinrui Wen, Jonathan Krell, Justin Stebbing
We used data obtained by Caris Life Sciences, to evaluate the benefits of tailoring treatments for a breast carcinoma cohort by using tumor molecular profiles to inform decisions. Data for 92 breast cancer patients from the commercial Caris Molecular Intelligence database was retrospectively divided into two groups, so that the first always followed treatment recommendations, whereas in the second group all patients received at least one drug after profiling that was predicted to lack benefit. The biomarker and drug associations were based on tests including fluorescent in situ hybridization and DNA sequencing, although immunohistochemistry was the main test used...
April 3, 2018: Oncotarget
https://www.readbyqxmd.com/read/29704771/new-approach-based-on-immunochemical-techniques-for-monitoring-of-selective-estrogen-receptor-modulators-serms-in-human-urine
#12
J-Pablo Salvador, Ester Vila-Roca, Núria Monfort, Rosa Ventura, M-Pilar Marco
Antiestrogenic compounds such as tamoxifen, toremifen and chlomifen are used illegally by athletes to minimize physical impacts such as gynecomastia resulting from the secondary effects of anabolic androgenic steroids, used to increase athletic efficiency unlawfully. The use of these compounds is banned by the World Anti-Doping Agency (WADA) and controls are made through analytical methodologies such as HPLC-MS/MS, which do not fulfil the sample throughput requirements. Moreover, compounds such as tamoxifen are also used to treat hormone receptor-positive breast cancer (ER + )...
April 22, 2018: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29702199/androgen-and-estrogen-receptor-mediated-activities-of-4-hydroxytestosterone-4-hydroxyandrostenedione-and-their-human-metabolites-in-yeast-based-assays
#13
Annekathrin Martina Keiler, Oliver Zierau, Sylvi Wolf, Patrick Diel, Wilhelm Schänzer, Günter Vollmer, David Machalz, Gerhard Wolber, Maria Kristina Parr
4-Hydroxyandrost-4-ene-3,17-dione, also named formestane, is an irreversible aromatase inhibitor and therapeutically used as anti-breast cancer medication in post-menopausal women. Currently, no therapeutical indication led to approval of its 17-hydroxylated analog 4-hydroxytestosterone, an anabolic steroid. However, it is currently investigated in a clinical trial for breast cancer. In context with sports doping, aromatase inhibitors are administered to reduce estrogenic side effects of misused anabolic substances or their metabolites...
April 24, 2018: Toxicology Letters
https://www.readbyqxmd.com/read/29699953/the-role-of-metabolic-syndrome-variant-in-the-malignant-tumors-progression
#14
REVIEW
Natalia V Yunusova, Irina V Kondakova, Larisa A Kolomiets, Sergey G Afanas'ev, Anastasia Yu Kishkina, Liudmila V Spirina
Metabolic syndrome (MS) is one of the leading risk factors for the development of some common cancers (endometrial cancer, postmenopausal breast cancer, colorectal cancer). Currently, a drug-induced metabolic syndrome related with androgen deprivation therapy in patients with prostate cancer represents a serious medical problem. Not only MS, or its individual components, but MS variants with different levels of leptin, adiponectin, visfatin, resistin are associated with tumor invasion, metastasis and survival rates in patients with MS-associated malignancies...
April 17, 2018: Diabetes & Metabolic Syndrome
https://www.readbyqxmd.com/read/29699584/androgen-receptor-and-heat-shock-protein-27-co-regulate-the-malignant-potential-of-molecular-apocrine-breast-cancer
#15
Xiaozhen Liu, Changyun Feng, Junjun Liu, Lu Cao, Guomin Xiang, Fang Liu, Shuling Wang, Jiao Jiao, Yun Niu
BACKGROUND: The most striking feature of molecular apocrine breast cancer (MABC) is the expression of androgen receptor (AR). We report here the mechanism of the AR in regulating the behavior of MABC. METHODS: The MABC cell line, MDA-MB-453, and the nonMABC cell line, MCF7, were used in this study. The effect of dihydrotestosterone (DHT) and heat shock protein 27 (HSP27) on cell proliferation was quantified using the cell counter kit-8 (CCK8) and clonogenic assays in vitro and by a xenograft tumor model in vivo...
April 27, 2018: Journal of Experimental & Clinical Cancer Research: CR
https://www.readbyqxmd.com/read/29662238/structural-underpinnings-of-oestrogen-receptor-mutations-in-endocrine-therapy-resistance
#16
REVIEW
John A Katzenellenbogen, Christopher G Mayne, Benita S Katzenellenbogen, Geoffrey L Greene, Sarat Chandarlapaty
Oestrogen receptor-α (ERα), a key driver of breast cancer, normally requires oestrogen for activation. Mutations that constitutively activate ERα without the need for hormone binding are frequently found in endocrine-therapy-resistant breast cancer metastases and are associated with poor patient outcomes. The location of these mutations in the ER ligand-binding domain and their impact on receptor conformation suggest that they subvert distinct mechanisms that normally maintain the low basal state of wild-type ERα in the absence of hormone...
April 16, 2018: Nature Reviews. Cancer
https://www.readbyqxmd.com/read/29662164/transcription-factors-operate-across-disease-loci-with-ebna2-implicated-in-autoimmunity
#17
John B Harley, Xiaoting Chen, Mario Pujato, Daniel Miller, Avery Maddox, Carmy Forney, Albert F Magnusen, Arthur Lynch, Kashish Chetal, Masashi Yukawa, Artem Barski, Nathan Salomonis, Kenneth M Kaufman, Leah C Kottyan, Matthew T Weirauch
Explaining the genetics of many diseases is challenging because most associations localize to incompletely characterized regulatory regions. Using new computational methods, we show that transcription factors (TFs) occupy multiple loci associated with individual complex genetic disorders. Application to 213 phenotypes and 1,544 TF binding datasets identified 2,264 relationships between hundreds of TFs and 94 phenotypes, including androgen receptor in prostate cancer and GATA3 in breast cancer. Strikingly, nearly half of systemic lupus erythematosus risk loci are occupied by the Epstein-Barr virus EBNA2 protein and many coclustering human TFs, showing gene-environment interaction...
April 16, 2018: Nature Genetics
https://www.readbyqxmd.com/read/29656345/update-on-the-treatment-of-early-stage-triple-negative-breast-cancer
#18
REVIEW
Priyanka Sharma
Triple-negative breast cancer (TNBC) accounts for 15% of all breast cancers and is associated with poor long-term outcomes compared to other breast cancer subtypes. Currently, chemotherapy remains the main modality of treatment for early-stage TNBC, as there is no approved targeted therapy for this subtype. The biologic heterogeneity of TNBC has hindered the development and evaluation of novel agents, but recent advancements in subclassifying TNBC have paved the way for further investigation of more effective systemic therapies, including cytotoxic and targeted agents...
April 14, 2018: Current Treatment Options in Oncology
https://www.readbyqxmd.com/read/29656222/prolactin-induced-protein-pip-is-a-potential-biomarker-for-early-stage-and-malignant-breast-cancer
#19
Anju Gangadharan, Themba Nyirenda, Kishan Patel, Nydia Jaimes-Delgadillo, Dominique Coletta, Takemi Tanaka, Ayal C Walland, Zena Jameel, Srinivasa Vedantam, Sittinon Tang, Ciaran Mannion, Grace Y Lee, Andre Goy, Andrew Pecora, K Stephen Suh
OBJECTIVES: Breast cancer (BC) is the second leading cause of cancer-related mortality in women. Bioinformatic analysis and expression screening showed that Prolactin Induced Protein (PIP) was differentially expressed in BC. The objective of this investigation was to characterize the expression pattern of PIP, an aspartyl proteinase, in malignant and non-malignant breast tissues. MATERIALS AND METHODS: Real time quantitative PCR was employed to analyze PIP and androgen receptor (AR) mRNA levels in BC cell lines and 190 normal tissues and tumor samples...
April 12, 2018: Breast: Official Journal of the European Society of Mastology
https://www.readbyqxmd.com/read/29651273/are-there-differences-in-androgen-receptor-expression-in-invasive-breast-cancer-in-african-tanzanian-population-in-comparison-with-the-caucasian-italian-population
#20
Sara Bravaccini, Sara Ravaioli, Dino Amadori, Emanuela Scarpi, Maurizio Puccetti, Andrea Rocca, Maria Maddalena Tumedei, Nestory Masalu, Jackson Kahima, Akwilina Pangan, Lucas Faustine, Alberto Farolfi, Roberta Maltoni, Massimiliano Bonafè, Patrizia Serra, Giuseppe Bronte
Purpose: Androgen receptor (AR) has been shown to have prognostic implication on breast cancer (BC). Data on the biological features of African BCs are poor. We decided for the first time to compare AR expression of Tanzanian and Italian BC patients. Patients and methods: Of the 69 consecutive patients seen at the Bugando Medical Center (Mwanza, Tanzania) from 2003 to 2010, who underwent resection of primary BC evaluable for estrogen receptor, progesterone receptor (PgR), and HER2 only 65 were evaluable for AR by immunohistochemistry...
2018: Frontiers in Endocrinology
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