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Estrogen receptor alpha

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https://www.readbyqxmd.com/read/28108275/benzofuran-2-acetic-ester-derivatives-induce-apoptosis-in-breast-cancer-cells-by-upregulating-p21-cip-waf1-gene-expression-in-p53-independent-manner
#1
Cinzia Giordano, Daniela Rovito, Ines Barone, Raffaella Mancuso, Daniela Bonofiglio, Francesca Giordano, Stefania Catalano, Bartolo Gabriele, Sebastiano Andò
Breast cancer is the most common malignancy and the leading cause of cancer-related death in women worldwide. High toxicity of used chemotherapeutics and resistance of cancer cells to treatments are a driving force for searching the new drug candidates for breast cancer therapy. In this study, we tested the antiproliferative effects of a series of benzofuran-2-acetic methyl ester derivatives, synthesized by a palladium-catalyzed carbonylative heterocyclization approach, on breast cancer cells. We observed that benzofuran compounds bearing a phenyl or tert-butyl substituent α to the methoxycarbonyl group significantly inhibited anchorage-dependent and -independent cell growth, and induced G0/G1 cell cycle arrest in human estrogen receptor alpha positive (MCF-7 and T47D) and in triple negative MDA-MB-231 breast cancer cells, without affecting growth of MCF-10A normal breast epithelial cells...
January 15, 2017: DNA Repair
https://www.readbyqxmd.com/read/28106301/uxt-is-a-lox-pp-interacting-protein-that-modulates-estrogen-receptor-alpha-activity-in-breast-cancer-cells
#2
Nuria Sánchez-Morgan, Kathrin H Kirsch, Philip C Trackman, Gail E Sonenshein
The lysyl oxidase proenzyme propeptide region (LOX-PP) is a tumor suppressor protein whose mechanism of action is not completely understood. Here, the Ubiquitously eXpressed Transcript (UXT) was identified in a yeast two-hybrid assay with LOX-PP as bait and confirmed as a novel LOX-PP associating protein. UXT, a prefoldin-like protein, is ubiquitous in human and mouse. Since UXT modulates androgen receptor transcriptional activity in prostate cancer, we studied its role in breast cancer. Breast tumors and derived cell lines overexpressed UXT...
January 20, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28103936/elevated-collagen-i-augments-tumor-progressive-signals-intravasation-and-metastasis-of-prolactin-induced-estrogen-receptor-alpha-positive-mammary-tumor-cells
#3
Craig E Barcus, Kathleen A O'Leary, Jennifer L Brockman, Debra E Rugowski, Yuming Liu, Nancy Garcia, Menggang Yu, Patricia J Keely, Kevin W Eliceiri, Linda A Schuler
BACKGROUND: The development and progression of estrogen receptor alpha positive (ERα+) breast cancer has been linked epidemiologically to prolactin. However, activation of the canonical mediator of prolactin, STAT5, is associated with more differentiated cancers and better prognoses. We have reported that density/stiffness of the extracellular matrix potently modulates the repertoire of prolactin signals in human ERα + breast cancer cells in vitro: stiff matrices shift the balance from the Janus kinase (JAK)2/STAT5 cascade toward pro-tumor progressive extracellular regulated kinase (ERK)1/2 signals, driving invasion...
January 19, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/28095297/dual-estrogenic-regulation-of-the-nuclear-progestin-receptor-and-spermatogonial-renewal-during-gilthead-seabream-sparus-aurata-spermatogenesis
#4
François Chauvigné, Janmejay Parhi, Judith Ollé, Joan Cerdà
Studies in teleosts suggest that progestins have crucial functions during early spermatogenesis. However, the role of the different progestin receptors in these mechanisms is poorly understood. In this work, we investigated the expression pattern and hormonal regulation of the classical nuclear progestin receptor (Pgr) in the gilthead seabream at three different stages of spermatogenesis: the resting (postspawning) phase, onset of spermatogenesis, and spermiation. Immunolocalization experiments using a seabream specific Pgr antibody revealed that the receptor was expressed in Sertoli and Leydig cells, and also in a subset of spermatogonia type A, throughout spermatogenesis...
January 14, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/28091581/icaritin-enhances-mesc-self-renewal-through-upregulating-core-pluripotency-transcription-factors-mediated-by-er%C3%AE
#5
Wing Pui Tsang, Fengjie Zhang, Qiling He, Waijiao Cai, Jianhua Huang, Wai Yee Chan, Ziyin Shen, Chao Wan
Utilization of small molecules in modulation of stem cell self-renewal is a promising approach to expand stem cells for regenerative therapy. Here, we identify Icaritin, a phytoestrogen molecule enhances self-renewal of mouse embryonic stem cells (mESCs). Icaritin increases mESCs proliferation while maintains their self-renewal capacity in vitro and pluripotency in vivo. This coincides with upregulation of key pluripotency transcription factors OCT4, NANOG, KLF4 and SOX2. The enhancement of mESCs self-renewal is characterized by increased population in S-phase of cell cycle, elevation of Cylin E and Cyclin-dependent kinase 2 (CDK2) and downregulation of p21, p27 and p57...
January 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28089711/regulation-of-expression-of-hyperalgesic-priming-by-estrogen-receptor-alpha-in-the-rat
#6
Luiz F Ferrari, Dionéia Araldi, Jon D Levine
: Hyperalgesic priming, a sexually dimorphic model of transition to chronic pain, is expressed as prolongation of prostaglandin E2 (PGE2)-induced hyperalgesia by the activation of an additional pathway including an autocrine mechanism at the plasma membrane. The autocrine mechanism involves the transport of cAMP to the extracellular space, and its conversion to AMP and adenosine, by ecto-5'phosphodiesterase and ecto-5'nucleotidase, respectively. The end product, adenosine, activates A1 receptors, producing delayed onset prolongation of PGE2 hyperalgesia...
January 9, 2017: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/28087261/dna-aptamer-probes-for-detection-of-estrogen-receptor-%C3%AE-positive-carcinomas
#7
Arghya Sett, Bibhuti Bhusan Borthakur, Jagannath Dev Sharma, Amal Chandra Kataki, Utpal Bora
Estrogen receptor alpha (ERα) which is a ligand-activated transcription factor also known as NR3A1 (nuclear receptor subfamily 3, group A, member 1). It is an important biomarker for breast cancer metastasis. In the present study, we report a novel DNA aptamer candidate against estrogen receptor (ER) alpha structure. The enriched aptamer candidate was obtained after 14 iterative cycles of in vitro protein-SELEX process. Isothermal calorimetry study suggests the nanomolar sensitivity of the candidate ER_Apt1 to its target protein...
December 25, 2016: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/28079108/improving-the-concentrations-of-the-active-components-in-the-herbal-tea-ingredient-uraria-crinita-the-effect-of-post-harvest-oven-drying-processing
#8
Jung Chao, Yuntao Dai, Hao-Yuan Cheng, Wing Lam, Yung-Chi Cheng, Ke Li, Wen-Huang Peng, Li-Heng Pao, Ming-Tsuen Hsieh, Xue-Mei Qin, Meng-Shiou Lee
Uraria crinita is widely used as a popular folk drink; however, little is known about how the post-harvest operations affect the chemical composition and bioactivity of UC. We assessed three drying methods (Oven-drying, Air-drying, Sun-drying), as well as the Oven-drying temperature using metabolomics approaches and bioactivity assays. The samples processed at 40 degree show a greater effect on the levels of estrogen receptor-alpha activity and nuclear factor erythroid 2-related factor 2 activity, anti-oxidative activity, and cyclooxygenase-2 inhibition compared with the other samples...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28078498/perinatal-exposure-to-bisphenol-a-or-diethylstilbestrol-increases-the-susceptibility-to-develop-mammary-gland-lesions-after-estrogen-replacement-therapy-in-middle-aged-rats
#9
Ayelen L Gomez, Melisa B Delconte, Gabriela A Altamirano, Lucia Vigezzi, Veronica L Bosquiazzo, Luís F Barbisan, Jorge G Ramos, Enrique H Luque, Mónica Muñoz-de-Toro, Laura Kass
The development of the mammary gland is a hormone-regulated event. Several factors can dysregulate its growth and make the gland more susceptible to cellular transformation. Among these factors, perinatal exposure to xenoestrogens and hormone replacement therapy has been associated with increased risk of developing breast cancer. Here, we assessed the effects induced by estrogen replacement therapy (ERT) in ovariectomized (OVX) middle-aged rats and whether perinatal exposure to diethylstilbestrol (DES) or bisphenol A (BPA) modified these effects in the mammary gland...
January 11, 2017: Hormones & Cancer
https://www.readbyqxmd.com/read/28076930/hormone-receptor-expression-in-human-fascial-tissue
#10
C Fede, G Albertin, L Petrelli, M M Sfriso, C Biz, R De Caro, C Stecco
Many epidemiologic, clinical, and experimental findings point to sex differences in myofascial pain in view of the fact that adult women tend to have more myofascial problems with respect to men. It is possible that one of the stimuli to sensitization of fascial nociceptors could come from hormonal factors such as estrogen and relaxin, that are involved in extracellular matrix and collagen remodeling and thus contribute to functions of myofascial tissue. Immunohistochemical and molecular investigations (real-time PCR analysis) of relaxin receptor 1 (RXFP1) and estrogen receptor-alpha (ERα) localization were carried out on sample of human fascia collected from 8 volunteers patients during orthopedic surgery (all females, between 42 and 70 yrs, divided into pre- and post-menopausal groups), and in fibroblasts isolated from deep fascia, to examine both protein and RNA expression levels...
November 2, 2016: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/28073843/active-estrogen-receptor-alpha-signaling-in-ovarian-cancer-models-and-clinical-specimens
#11
Courtney L Andersen, Matthew J Sikora, Michelle M Boisen, Tianzhou Ma, Alec Christie, George Tseng, Yong Seok Park, Soumya Luthra, Uma Chandran, Paul Haluska, Gina Mantia-Smaldone, Kunle Odunsi, Karen McLean, Adrian V Lee, Esther Elishaev, Robert P Edwards, Steffi Oesterreich
PURPOSE: High-grade serous ovarian cancer (HGSOC) is an aggressive disease with few available targeted therapies. Despite high expression of estrogen receptor-alpha in ~80% of HGSOC and some small but promising clinical trials of endocrine therapy, estrogen receptor-alpha has been understudied as a target in this disease. We sought to identify hormone-responsive, estrogen receptor-alpha-dependent HGSOC. EXPERIMENTAL DESIGN: We characterized endocrine response in HGSOC cells across culture conditions (2-D, 3-D, forced suspension) and in patient-derived xenograft (PDX) explants, assessing proliferation and gene expression...
January 10, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28072477/recurrent-nab2-stat6-gene-fusions-and-estrogen-receptor-alpha-expression-in-pulmonary-adenofibromas
#12
Nicola Fusco, Elena Guerini-Rocco, Claudia Augello, Andrea Terrasi, Giulia Ercoli, Caterina Fumagalli, Davide Vacirca, Paola Braidotti, Antonina Parafioriti, Marta Jaconi, Letterio Runza, Vijayalakshmi Ananthanarayanan, Fabio Pagni, Silvano Bosari, Massimo Barberis, Stefano Ferrero
AIMS: Pulmonary adenofibromas are rare benign fibroepithelial tumours of the lung with unknown histogenesis and an indolent clinical behaviour. Their stroma resembles that of solitary fibrous tumours, while the glands are composed of respiratory epithelium organized in a phyllodes-like architecture. Differentiation of pulmonary adenofibromas from other more aggressive intrathoracic tumours is clinically relevant. However, their biology is unknown. Here, we sought to characterize pulmonary adenofibromas at a clinicopathologic level and to define whether they could be underpinned by a highly recurrent somatic genetic alteration akin to tumours with similar morphology...
January 10, 2017: Histopathology
https://www.readbyqxmd.com/read/28069384/regulation-of-cancerous-progression-and-epithelial-mesenchymal-transition-by-mir-34c-3p-via-modulation-of-map3k2-signaling-in-triple-negative-breast-cancer-cells
#13
Jiang Wu, Wei-Zhi Li, Mei-Ling Huang, Hong-Liang Wei, Ting Wang, Jing Fan, Nan-Lin Li, Rui Ling
Emerging but limited data have evidenced an essential involvement of microRNAs (miRNAs) in the development and progression of triple negative breast cancer (TNBC), which empowers these small regulators as an innovative therapeutic approach, especially for this unique tumor subgroup still lacking an efficient and specific therapeutic target. Herein, we reported the down-regulation of miR-34c-3p level in TNBC tissues, and its expression was closely associated with estrogen receptor alpha (ERα), but not other receptors, in well-characterized breast cancer (BCa) cells...
January 6, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28062672/repurposing-antiestrogens-for-tumor-immunotherapy
#14
Thomas Welte, Xiang H-F Zhang, Jeffrey M Rosen
Svoronos and colleagues observed estrogen receptor alpha-positive cells in the tumor stroma of patients with ovarian cancer that appeared to be independent of both the tumor's estrogen receptor status and tumor type. These cells were identified as immunosuppressive myeloid-derived suppressor cells (MDSC) and could be targeted by antiestrogen therapy, thereby leading to the hypothesis that endocrine therapy when combined with immunotherapy may provide a potential therapeutic benefit by helping to reduce immunosuppressive MDSCs...
January 2017: Cancer Discovery
https://www.readbyqxmd.com/read/28062545/a-review-of-estrogen-receptor-androgen-receptor-genomics-in-male-breast-cancer
#15
Tesa M Severson, Wilbert Zwart
Male breast cancer is a rare disease, of which little is known. In contrast to female breast cancer, the very vast majority of all cases are positive for Estrogen Receptor alpha (ERα), implicating the function of this steroid hormone receptor in tumor development and progression. Consequently, adjuvant treatment of male breast cancer revolves around inhibition of ERα. In addition, the Androgen Receptor (AR) gradually receives more attention as a relevant novel target in breast cancer treatment. Importantly, the rationale of treatment-decision making is strongly based on parallels with female breast cancer...
January 6, 2017: Endocrine-related Cancer
https://www.readbyqxmd.com/read/28058491/evaluating-the-impact-of-genetic-and-epigenetic-aberrations-on-survival-and-response-in-acute-myeloid-leukemia-patients-receiving-epigenetic-therapy
#16
Jan K Hiller, Claudia Schmoor, Verena I Gaidzik, Charlotte Schmidt-Salzmann, Arzu Yalcin, Mahmoud Abdelkarim, Nadja Blagitko-Dorfs, Konstanze Döhner, Lars Bullinger, Justus Duyster, Michael Lübbert, Björn Hackanson
Treatment with hypomethylating agents such as decitabine, which results in overall response rates of up to 50%, has become standard of care in older patients with acute myeloid leukemia (AML) who are not candidates for intensive chemotherapy. However, there still exists a lack of prognostic and predictive molecular biomarkers that enable selection of patients who are likely to benefit from epigenetic therapy. Here, we investigated distinct genetic (FLT3-ITD, NPM1, DNMT3A) and epigenetic (estrogen receptor alpha (ERα), C/EBPα, and OLIG2) aberrations in 87 AML patients from the recently published phase II decitabine trial (AML00331) to identify potential biomarkers for patients receiving hypomethylating therapy...
January 5, 2017: Annals of Hematology
https://www.readbyqxmd.com/read/28057769/extra-nuclear-effects-of-estrogen-on-cortical-bone-in-males-require-er%C3%AE-af-1
#17
Helen H Farman, Jianyao Wu, Karin L Gustafsson, Sara H Windahl, Sung Hoon Kim, John A Katzenellenbogen, Claes Ohlsson, Marie K Lagerquist
Estradiol (E2) signaling via estrogen receptor alpha (ERα) is important for the male skeleton as demonstrated by ERα inactivation in both mice and man. ERα mediates estrogenic effects by translocating to the nucleus and there affecting gene transcription, but can also mediate effects via extra-nuclear actions by e.g., triggering cytoplasmic signaling cascades. ERα contains various domains and the role of activation function 1 (ERαAF-1) is known to be tissue-specific. The aim of this study was to determine the importance of extra-nuclear estrogen effects for the skeleton in males and to determine the role of ERαAF-1 for mediating these effects...
January 5, 2017: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/28045098/effects-of-elevated-%C3%AE-estradiol-levels-on-the-functional-morphology-of-the-testis-new-insights
#18
Myles Leavy, Matthias Trottmann, Bernhard Liedl, Sven Reese, Christian Stief, Benjamin Freitag, John Baugh, Giulio Spagnoli, Sabine Kölle
Elevated estradiol levels are correlated with male infertility. Causes of hyperestrogenism include diseases of the adrenal cortex, testis or medications affecting the hypothalamus-pituitary-gonadal axis. The aim of our study was to elucidate the effects of estradiol treatment on testicular cellular morphology and function, with reference to the treatment regimen received. Testes samples (n = 9) were obtained post-orchiectomy from male-to-female transsexuals within the age range of 26-52 years. Each patient had a minimum of 1-6 years estradiol treatment...
January 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28043824/esr1-and-its-antagonist-fulvestrant-in-pituitary-adenomas
#19
Hua Gao, Yake Xue, Lei Cao, Qian Liu, Chunhui Liu, Xiaosong Shan, Hongyun Wang, Yi Gu, Yazhuo Zhang
Estrogen has a key role in the pathogenesis of pituitary adenomas (PAs). The study was to evaluate the estrogen receptor alpha (ESR1) level in 289 PAs cases, its association with clinicopathologic features and serving as a target of cancer treatment. In this study, the ESR1 level was evaluated by tissue microarray (TMA). The effect of fulvestrant was determined by an animal model of prolactinoma established by subcutaneous injection of 17β-estradiol in F344 rats. The volume and weight of the pituitary were assessed in the different groups...
December 31, 2016: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28043343/expression-of-oxytocin-progesterone-and-estrogen-receptors-in-the-reproductive-tract-of-bitches-with-pyometra
#20
N Prapaiwan, S Manee-In, E Olanratmanee, S Srisuwatanasagul
Canine pyometra is considered a serious and life-threatening condition. Due to the relationship among sex steroid hormones, oxytocin receptor (OTR) expression, and canine pyometra pathogenesis, this study aimed to investigate the expression of oxytocin, progesterone, and estrogen receptors in the reproductive tissues of canines with pyometra by real-time PCR and immunohistochemistry. A total of 27 pyometra bitches were classified into open- and closed-cervix pyometra groups based on the presence of vaginal discharge...
February 2017: Theriogenology
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