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estrogen related receptors

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https://www.readbyqxmd.com/read/29775424/optimized-yeast-based-in-vitro-bioassay-for-determination-of-estrogenic-and-androgenic-activity-of-hydroxylated-methoxylated-metabolites-of-bdes-cbs-and-related-lipophilic-organic-pollutants
#1
Marek Roszko, Marta Kamińska, Krystyna Szymczyk, Katarzyna Piasecka-Jóźwiak, Beata Chabłowska
Persistent organic pollutants (POPs) are known to show endocrine disrupting (ED) activity, including interactions with hormone receptors. The aim of this work was to develop a bioassay applicable for evaluation of ED potency of highly lipophilic metabolites of POPs. To that end, a yeast-based bio-assay protocol was used. Estrogenic / androgenic activity of some native brominated biphenyl ethers (BDEs) / chlorinated biphenyls (CBs), and their hydroxylated / methoxylated metabolites was assessed. Since data (including potency compared to reference native hormones) obtained using different protocols vary, the possibility that yeast transforms POPs into some more potent compounds was first checked; it seems that no such transformation is important from the test applicability standpoint...
May 18, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29775019/-the-expression-and-clinical-progression-of-androgen-estrogen-and-prolactin-receptor-in-laryngeal-squamous-cell-carcinoma
#2
M J Fei, Y N Xu, J D Wang
Objective: The aim of this study is to analyze the different expression and function of androgen receptors (AR) and estrogen receptor (ER-α) in laryngeal squamous cell carcinoma (LSCC). In combination with the expression of prolactin receptor (PRLR), we analyzed the prognostic impact of three receptors on the laryngeal carcinoma. Method: In this study, immunohistochemistry and reverse transcription polymerase chain reaction (RT-PC) analysis were performed on the tumor tissues and adjacent normal tissues in 112 LSCC patients (95 males and 17 females)...
February 2018: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/29774321/sentinel-lymph-node-metastasis-in-invasive-lobular-carcinoma-of-the-breast
#3
Hikmet Erhan Güven, Mahmut Onur Kültüroğlu, Mehmet Ali Gülçelik, Cihangir Özaslan
Objective: Invasive lobular carcinoma (ILC) of the breast makes up 5 to 15 percent of all invasive breast cancers. It has distinctive clinical and histopathological features when compared to invasive ductal carcinoma (IDC). This study intends to describe factors influencing sentinel lymph node (SLN) positivity in patients with "pure" ILC. Materials and Methods: Data of 105 patients, who were treated at a tertiary oncology center, with lobular carcinoma of the breast that were subjected to SLN biopsy was probed retrospectively...
April 2018: European Journal of Breast Health
https://www.readbyqxmd.com/read/29774067/estrogen-receptors-orchestrate-cell-growth-and-differentiation-to-facilitate-liver-regeneration
#4
Ta-Lun Kao, Yu-Ping Kuan, Wei-Chung Cheng, Wei-Chun Chang, Long-Bin Jeng, Shuyuan Yeh, Wen-Lung Ma
Background and Aims: Improving liver regeneration (LR) capacity and thereby liver function reserve is a critical bridging strategy for managing liver failure patients. Since estrogen signaling may participate in LR, our aim was to characterize the roles of ERα and ERβ in LR. Methods: LR capacity and estradiol levels following 2/3rd partial hepatectomy (PHx) were compared in ERα-KO or ERβ-KO vs. wildtype mice. The ERα- or ERβ-related transcriptome and interactome were analyzed from regenerating livers, and then bioinformatics was used for pathway discovery and analysis of interactome-transcriptome relationships...
2018: Theranostics
https://www.readbyqxmd.com/read/29772574/is-there-a-rationale-behind-pharmacotherapy-in-idiopathic-gynecomastia
#5
Anna Kasielska-Trojan, Marian Danilewicz, Bogusław Antoszewski
BACKGROUND/AIMS: The aim of this research was to analyze digit ratio in relation to estrogen receptor (ER) and progesterone receptor (PR) expression and to verify digit ratio (2D: 4D) as a marker of ER and PR overexpression in the male breast. METHODS: This study included 35 patients who underwent breast reduction due to the idiopathic form of gynecomastia. The average age of the studied individuals was 25.7 years (SD = 7.8). ER and PR expression was detected in breasts, and digit ratios were calculated in patients with idiopathic gynecomastia...
May 17, 2018: Hormone Research in Pædiatrics
https://www.readbyqxmd.com/read/29770127/temporal-expression-patterns-of-genes-related-to-sex-steroid-action-in-sexually-dimorphic-nuclei-during-puberty
#6
Moeko Kanaya, Masahiro Morishita, Shinji Tsukahara
Sex steroids play a major role in sexually dimorphic brain development during not only the perinatal period but also the pubertal period. We previously showed that, in male mice, the estrogen receptor-α ( Esr1 ) and aromatase ( Cyp19a1 ) genes are essential to the sexually dimorphic formation of the anteroventral periventricular nucleus (AVPV) and the principal nucleus of the bed nucleus of the stria terminalis (BNSTp), but the estrogen receptor-β ( Esr2 ) gene is not necessary. We also showed that the androgen receptor ( Ar ) gene is essential to the sexually dimorphic formation of the BNSTp...
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29769125/observational-study-of-coagulation-activation-in-early-breast-cancer-development-of-a-prognostic-model-based-on-data-from-the-real-world-setting
#7
Chiara Mandoj, Laura Pizzuti, Domenico Sergi, Isabella Sperduti, Marco Mazzotta, Luigi Di Lauro, Antonella Amodio, Silvia Carpano, Anna Di Benedetto, Claudio Botti, Francesca Ferranti, Anna Antenucci, Maria Gabriella D'Alessandro, Paolo Marchetti, Silverio Tomao, Giuseppe Sanguineti, Antonio Giordano, Marcello Maugeri-Saccà, Gennaro Ciliberto, Laura Conti, Patrizia Vici, Maddalena Barba
BACKGROUND: Cancer and coagulation activation are tightly related. The extent to which factors related to both these pathologic conditions concur to patient prognosis intensely animates the inherent research areas. The study herein presented aimed to the development of a tool for the assessment and stratification of risk of death and disease recurrence in early breast cancer. METHODS: Between 2008 and 2010, two hundreds thirty-five (N: 235) patients diagnosed with stage I-IIA breast cancer were included...
May 16, 2018: Journal of Translational Medicine
https://www.readbyqxmd.com/read/29765553/acquired-resistance-to-everolimus-in-aromatase-inhibitor-resistant-breast-cancer
#8
Mariko Kimura, Toru Hanamura, Kouki Tsuboi, Yosuke Kaneko, Yuri Yamaguchi, Toshifumi Niwa, Kazutaka Narui, Itaru Endo, Shin-Ichi Hayashi
We previously reported the establishment of several types of long-term estrogen-depleted-resistant (EDR) cell lines from MCF-7 breast cancer cells. Type 1 EDR cells exhibited the best-studied mechanism of aromatase inhibitor (AI) resistance, in which estrogen receptor (ER) expression remained positive and PI3K signaling was upregulated. Type 2 EDR cells showed reduced ER activity and upregulated JNK-related signaling. The mTOR inhibitor everolimus reduced growth in cells similar to Type 1 EDR cells. The present study generated everolimus-resistant (EvR) cells from Types 1 and 2 EDR cells following long-term exposure to everolimus in vitro ...
April 20, 2018: Oncotarget
https://www.readbyqxmd.com/read/29765514/wnt5a-induced-cell-migration-is-associated-with-the-aggressiveness-of-estrogen-receptor-positive-breast-cancer
#9
Yoshie Kobayashi, Takayuki Kadoya, Ai Amioka, Hideaki Hanaki, Shinsuke Sasada, Norio Masumoto, Hideki Yamamoto, Koji Arihiro, Akira Kikuchi, Morihito Okada
Elevated expression of Wnt5a is associated with malignancy, cell invasion, and metastasis. The role of Wnt5a expression in breast cancer remains elusive. We investigated the significance of Wnt5a expression in breast cancer. The relationship between Wnt5a expression and clinicopathologic factors was assessed in invasive breast cancer ( n = 178) resected at Hiroshima University Hospital between January 2011 and February 2014. Wnt5a was expressed in 69 of 178 cases (39%) of invasive breast cancer and correlated strongly with estrogen receptor (ER) expression ( P < 0...
April 20, 2018: Oncotarget
https://www.readbyqxmd.com/read/29765046/estrogen-related-receptor-gamma-functions-as-a-tumor-suppressor-in-gastric-cancer
#10
Myoung-Hee Kang, Hyunji Choi, Masanobu Oshima, Jae-Ho Cheong, Seokho Kim, Jung Hoon Lee, Young Soo Park, Hueng-Sik Choi, Mi-Na Kweon, Chan-Gi Pack, Ju-Seog Lee, Gordon B Mills, Seung-Jae Myung, Yun-Yong Park
The principle factors underlying gastric cancer (GC) development and outcomes are not well characterized resulting in a paucity of validated therapeutic targets. To identify potential molecular targets, we analyze gene expression data from GC patients and identify the nuclear receptor ESRRG as a candidate tumor suppressor. ESRRG expression is decreased in GC and is a predictor of a poor clinical outcome. Importantly, ESRRG suppresses GC cell growth and tumorigenesis. Gene expression profiling suggests that ESRRG antagonizes Wnt signaling via the suppression of TCF4/LEF1 binding to the CCND1 promoter...
May 15, 2018: Nature Communications
https://www.readbyqxmd.com/read/29763890/mir-301a-3p-suppresses-estrogen-signaling-by-directly-inhibiting-esr1-in-er%C3%AE-positive-breast-cancer
#11
Sandra Lettlova, Veronika Brynychova, Jan Blecha, David Vrana, Magdalena Vondrusova, Pavel Soucek, Jaroslav Truksa
BACKGROUND/AIMS: MiRNA-301a-3p is an oncogenic miRNA whose expression is associated with tumor development, metastases and overall poor prognosis. Estrogen receptor α (ERα) is one of the estrogen hormone-activated transcription factors, which regulates a large number of genes and is involved in the mammary gland development. Expression of ERα is considered to be a good indicator for endocrine therapy and breast cancer survival. Loss of ERα in breast cancer patients indicates invasiveness and poor prognosis...
May 7, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29763858/the-oncologic-impact-of-hormone-replacement-therapy-in-premenopausal-breast-cancer-survivors-a-systematic-review
#12
REVIEW
Yimeng Wang, Naomi Lewin, Yazan Qaoud, A Nikoo Rajaee, Adena S Scheer
SYNOPSIS: This is the first systematic review to investigate the risk of recurrence in breast cancer survivors <50 years old who have used hormone replacement therapy (HRT). BACKGROUND: The risk of HRT in premenopausal breast cancer survivors is unclear. Due to the higher incidence of estrogen receptor negative tumours in women <50, the potential for HRT to promote breast cancer recurrence may differ from older age groups. METHODS: We performed a search of Medline, EMBASE and CINAHL through June 2016...
May 12, 2018: Breast: Official Journal of the European Society of Mastology
https://www.readbyqxmd.com/read/29761487/the-phytoestrogen-genistein-prevents-trabecular-bone-loss-and-affects-thyroid-follicular-cells-in-a-male-rat-model-of-osteoporosis
#13
Branko Filipović, Branka Šošić-Jurjević, Vladimir Ajdžanović, Jasmina Živanović, Milica Manojlović-Stojanoski, Nataša Nestorović, Nataša Ristić, Svetlana Trifunović, Verica Milošević
As a major phytoestrogen of soy, genistein effectively prevents bone loss in both humans and rat models of osteoporosis. However, although the bone-sparing effects of genistein are achieved directly through estrogen receptors, its mode of action on bone by modulation of other endocrine functions is not entirely clear. Thus, thyroid hormones and calcitonin (CT) have an essential influence on bone metabolism. Besides its action on bones, in this study we examined the effect of genistein on the activity of two different endocrine cell populations, thyroid follicular and C-cells...
May 14, 2018: Journal of Anatomy
https://www.readbyqxmd.com/read/29758362/the-anti-epileptic-drugs-valproate-carbamazepine-and-levetiracetam-cause-bone-loss-and-modulate-wnt-inhibitors-in-normal-and-ovariectomised-rats
#14
Bushra Parveen, Ambrish Kumar Tiwari, Moon Jain, Subhashis Pal, Naibedya Chattopadhyay, Manjari Tripathi, Divya Vohora
Secondary osteoporosis is the major concern associated with long term intake of antiepileptic drugs (AEDs). Women are the vulnerable targets owing to post-menopausal bone loss. In the present work, we evaluated the effect of 10 weeks of treatment with AED therapy (carbamazepine, CBZ, 75 mg/kg; sodium valproate, SVP, 300 mg/kg; levetiracetam, LTM, 150 mg/kg) on bone mineral density and microarchitecture at femoral epiphysis, lumbar vertebrae and proximal tibia of normal and ovariectomised Wistar rats...
May 11, 2018: Bone
https://www.readbyqxmd.com/read/29758174/g-protein-coupled-estrogen-receptor-gper-deficiency-induces-cardiac-remodeling-through-oxidative-stress
#15
Hao Wang, Xuming Sun, Marina S Lin, Carlos M Ferrario, Holly Van Remmen, Leanne Groban
Oxidative stress has been implicated in the unfavorable changes in cardiac function and remodeling that occur after ovarian estrogen loss. Using ovariectomized rat models, we previously reported that the cardioprotective actions of estrogen are mediated by the G protein-coupled estrogen receptor (GPER). Here, in 9-month-old, female cardiomyocyte-specific GPER knockout (KO) mice vs sex- and age-matched wild-type (WT) mice, we found increased cardiac oxidative stress and oxidant damage, measured as a decreased ratio of reduced glutathione to oxidized glutathione, increased 4-hydroxynonenal and 8-hydroxy-2'-deoxyguanosine (8-oxo-DG) staining, and increased expression of oxidative stress-related genes...
April 25, 2018: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/29755856/the-guiding-role-of-bone-metabolism-test-in-osteoporosis-treatment
#16
REVIEW
Wei Zhang, Guo-Ji Yang, Shi-Xian Wu, Dong-Qing Li, Ying-Bo Xu, Cheng-Hong Ma, Jun-Ling Wang, Wei-Wen Chen
Osteoporosis (OP) and osteoporotic fractures are becoming a serious health care issue in the world. Calcium and vitamin D are the basic treatment for osteoporosis. Nonetheless, they do not effectively reduce the incidences of fracture. Currently approved treatments for osteoporosis include selective estrogen receptor modulators (SERMs), bisphosphonates, denosumab, teriparatide, calcitonin and others. However, the appearance of some adverse effects including atypical fracture and breast cancer has limited long-term treatments above mentioned...
2018: American Journal of Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/29755356/anti-parkinson-potential-of-silymarin-mechanistic-insight-and-therapeutic-standing
#17
REVIEW
Hammad Ullah, Haroon Khan
Parkinson's disease (PD) involves aggregation of α-synuclein and progressive loss of dopaminergic neurons. Pathogenesis of PD may also be related to one's genetic background. PD is most common among geriatric population and approximately 1-2% of population suffers over age 65 years. Currently no successful therapies are in practice for the management of PD and available therapies tend to decrease the symptoms of PD only. Furthermore, these are associated with diverse range of adverse effects profile. The neuroprotective effects of polyphenols are widely studied and documented...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29753772/increase-in-hyaluronic-acid-degradation-decreases-the-expression-of-estrogen-receptor-alpha-in-mcf7-breast-cancer-cell-line
#18
Vincent Hanoux, Judith Eguida, Emmanuelle Fleurot, Jérôme Levallet, Pierre-Jacques Bonnamy
The loss of estrogen receptor α (ERα) expression in breast cancer constitutes a major hallmark of tumor progression to metastasis and is generally correlated to a strong increase in Hyaluronic Acid (HA) turnover. The aim of our study was to search for a putative link between these two major events of breast cancer progression in the estrogen receptor-positive (ER+) MCF7 breast cancer cell line. The increase in HA turnover was performed by stable overexpression of the standard CD44 (CD44S) isoform and also by treatment with exogenous Hyaluronidase (Hyal) to allow an increase in HA catabolism...
May 10, 2018: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/29753247/the-evaluation-of-endocrine-disrupting-effects-of-tert-butylphenols-towards-estrogenic-receptor-%C3%AE-androgen-receptor-and-thyroid-hormone-receptor-%C3%AE-and-aquatic-toxicities-towards-freshwater-organisms
#19
Jiaying Wang, Jingpeng Wang, Jinsong Liu, Jianzhi Li, Lihong Zhou, Huanxin Zhang, Jianteng Sun, Shulin Zhuang
The phenolic compounds have posed public concern for potential threats to human health and ecosystem. Tert-butylphenols (TBPs), as one group of emerging contaminants, showed potential endocrine disrupting effects and aquatic toxicities. In the present study, we detected concentrations of 2,4-DTBP ranging from <0.001 to 0.057 μg/L (detection limit: 0.001 μg/L) in drinking water source from the Qiantang River in East China in April 2016. The endocrine disrupting effects of 2-TBP, 2,4-DTBP and 2,6-DTBP toward human estrogen receptor α (ERα), androgen receptor (AR) and thyroid hormone receptor β (TRβ) were evaluated using human recombinant two-hybrid yeast bioassay...
May 9, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29751107/estrogens-and-selective-estrogen-receptor-modulators-differentially-antagonize-runx2-in-st2-mesenchymal-progenitor-cells
#20
Yonatan Amzaleg, Jie Ji, Donlaporn Kittivanichkul, Anna E Törnqvist, Sara Windahl, Elias Sabag, Aysha B Khalid, Hal Sternberg, Michael West, John A Katzenellenbogen, Susan A Krum, Nyam-Osor Chimge, Dustin E Schones, Yankel Gabet, Claes Ohlsson, Baruch Frenkel
Estrogens attenuate bone turnover by inhibiting both osteoclasts and osteoblasts, in part through antagonizing Runx2. Apparently conflicting, stimulatory effects in osteoblast lineage cells, however, sway the balance between bone resorption and bone formation in favor of the latter. Consistent with this dualism, 17ß-estradiol (E2) both stimulates and inhibits Runx2 in a locus-specific manner, and here we provide evidence for such locus-specific regulation of Runx2 by E2 in vivo. We also demonstrate dual, negative and positive, regulation of Runx2-driven alkaline phosphatase (ALP) activity by increasing E2 concentrations in ST2 osteoblast progenitor cells...
May 8, 2018: Journal of Steroid Biochemistry and Molecular Biology
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