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https://www.readbyqxmd.com/read/28520870/defining-the-role-of-estrogen-receptor-beta-in-the-regulation-of-female-fertility
#1
Ma Karim Rumi, Prabhakar Singh, Katherine F Roby, Xiao Zhao, Khursheed Iqbal, Anamika Ratri, Tianhua Lei, Wei Cui, Shaon Borosha, Pramod Dhakal, Kaiyu Kubota, Damayanti Chakraborty, Jay L Vivian, Michael W Wolfe, Michael J Soares
Estrogens are essential hormones for the regulation of fertility. Cellular responses to estrogens are mediated by estrogen receptor alpha (ESR1) and estrogen receptor beta (ESR2). In mouse and rat models, disruption of Esr1 causes infertility in both males and females. However, the role of ESR2 in reproductive function remains undecided due to a wide variation in phenotypic observations among Esr2 mutant mouse strains. Regulatory pathways independent of ESR2 binding to its cognate DNA response element have also been implicated in ESR2 signaling...
May 16, 2017: Endocrinology
https://www.readbyqxmd.com/read/28510269/kallikrein-related-peptidase-4-induces-cancer-associated-fibroblast-features-in-prostate-derived-stromal-cells
#2
T Kryza, L M Silva, N Bock, R A Fuhrman-Luck, C R Stephens, J Gao, H Samaratunga, M G Lawrence, J D Hooper, Y Dong, G P Risbridger, J A Clements
The reciprocal communication between cancer cells and their microenvironment is critical in cancer progression. Although involvement of cancer-associated fibroblasts (CAF) in cancer progression is long established, the molecular mechanisms leading to differentiation of CAFs from normal fibroblasts are poorly understood. Here, we report that kallikrein-related peptidase-4 (KLK4) promotes CAF differentiation. KLK4 is highly expressed in prostate epithelial cells of premalignant (prostatic intra-epithelial neoplasia) and malignant lesions compared to normal prostate epithelia, especially at the peri-stromal interface...
May 16, 2017: Molecular Oncology
https://www.readbyqxmd.com/read/28490809/hepatic-estrogen-receptor-%C3%AE-is-critical-for-regulation-of-gluconeogenesis-and-lipid-metabolism-in-males
#3
Shuiqing Qiu, Juliana Torrens Vazquez, Erin Boulger, Haiyun Liu, Ping Xue, Mehboob Ali Hussain, Andrew Wolfe
Impaired estrogens action is associated with features of the metabolic syndrome in animal models and humans. We sought to determine whether disruption of hepatic estrogens action in adult male mice could recapitulate aspects of the metabolic syndrome to understand the mechanistic basis for the phenotype. We found 17β-estradiol (E2) inhibited hepatic gluconeogenic genes such as phosphoenolpyruvate carboxykinase 1 (Pck-1) and glucose 6-phosphatase (G6Pase) and this effect was absent in mice lacking liver estrogen receptor α (Esr1) (LERKO mice)...
May 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28490348/an-international-reproducibility-study-validating-quantitative-determination-of-erbb2-esr1-pgr-and-mki67-mrna-in-breast-cancer-using-mammatyper%C3%A2
#4
Zsuzsanna Varga, Annette Lebeau, Hong Bu, Arndt Hartmann, Frederique Penault-Llorca, Elena Guerini-Rocco, Peter Schraml, Fraser Symmans, Robert Stoehr, Xiaodong Teng, Andreas Turzynski, Reinhard von Wasielewski, Claudia Gürtler, Mark Laible, Kornelia Schlombs, Heikki Joensuu, Thomas Keller, Peter Sinn, Ugur Sahin, John Bartlett, Giuseppe Viale
BACKGROUND: Accurate determination of the predictive markers human epidermal growth factor receptor 2 (HER2/ERBB2), estrogen receptor (ER/ESR1), progesterone receptor (PgR/PGR), and marker of proliferation Ki67 (MKI67) is indispensable for therapeutic decision making in early breast cancer. In this multicenter prospective study, we addressed the issue of inter- and intrasite reproducibility using the recently developed reverse transcription-quantitative real-time polymerase chain reaction-based MammaTyper® test...
May 11, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/28489591/molecular-characterization-of-circulating-tumor-cells-from-patients-with-metastatic-breast-cancer-reflects-evolutionary-changes-in-gene-expression-under-the-pressure-of-systemic-therapy
#5
Kristina E Aaltonen, Vendula Novosadová, Pär-Ola Bendahl, Cecilia Graffman, Anna-Maria Larsson, Lisa Rydén
Resistance to systemic therapy is a major problem in metastatic breast cancer (MBC) that can be explained by initial tumor heterogeneity as well as by evolutionary changes during therapy and tumor progression. Circulating tumor cells (CTCs) detected in a liquid biopsy can be sampled and characterized repeatedly during therapy in order to monitor treatment response and disease progression. Our aim was to investigate how CTC derived gene expression of treatment predictive markers (ESR1/HER2) and other cancer associated markers changed in patient blood samples during six months of first-line systemic treatment for MBC...
April 20, 2017: Oncotarget
https://www.readbyqxmd.com/read/28481895/succinct-workflows-for-circulating-tumor-cells-after-enrichment-from-systematic-counting-to-mutational-profiling
#6
Victor Chun-Lam Wong, Josephine Mun-Yee Ko, Chi-Tat Lam, Maria Li Lung
PURPOSE: This study aims to establish a highly adaptable workflow downstream of microfluidic enrichment for facilitating systematic CTC enumeration and genetic discovery. METHODS: To facilitate CTC enumeration, we established a CK/EPCAM-combined immunostaining strategy and an automated CTC analytical pipeline using an open-source image analyzer. By virtue of this workflow, we conducted a pilot study of 56 cancer patients and 21 healthy individuals using a high-throughput spiral microfluidic chip system...
2017: PloS One
https://www.readbyqxmd.com/read/28481366/the-zinc-finger-transcriptional-factor-slug-transcriptionally-downregulates-er%C3%AE-by-recruiting-lysine-specific-demethylase-1-in-human-breast-cancer
#7
J-W Bai, M-N Chen, X-L Wei, Y-Ch Li, H-Y Lin, M Chen, J-W Li, C-W Du, K Man, G-J Zhang
Estrogen receptor α (ERα) is related with epithelial-mesenchymal transition, invasion and metastasis, and serves as an important therapeutic predictor and prognostic factor in breast cancer patients. The triple negative breast cancer (TNBC) is characterized by loss of hormone receptors and human epidermal growth factor receptor 2 (Her2), and lacks effective targeted therapy with poor prognosis. Unfortunately, the molecular mechanisms of ERα deficiency, which becomes hormone independent and results in resistance to endocrine therapy, remain to be elucidated in breast cancer...
May 8, 2017: Oncogenesis
https://www.readbyqxmd.com/read/28481132/disruption-of-estrogen-receptor-alpha-in-rats-results-in-faster-initiation-of-compensatory-regeneration-despite-higher-liver-injury-after-carbon-tetrachloride-treatment
#8
Steven R McGreal, Karim Rumi, Michael J Soares, Benjamin L Woolbright, Hartmut Jaeschke, Udayan Apte
Estrogen receptor alpha (ESR1) is 1 of the 2 intracellular receptors for estrogen and is expressed by hepatocytes in the liver. The role of ESR1 in the regulation of toxicant-induced liver injury and compensatory regeneration is not completely clear. We investigated the role of ESR1 in liver regeneration after carbon tetrachloride (CCl4)-induced liver injury using wild type (WT) and ESR1 knockout (ESR1-KO) rats. Adult female WT and ESR1-KO rats were treated with 1 mL/kg CCl4 and euthanized over a time course of 0 to 48 hours...
January 1, 2017: International Journal of Toxicology
https://www.readbyqxmd.com/read/28473534/elacestrant-rad1901-a-selective-estrogen-receptor-degrader-serd-has-anti-tumor-activity-in-multiple-er-breast-cancer-patient-derived-xenograft-models
#9
Teeru Bihani, Hitisha K Patel, Heike Arlt, Nianjun Tao, Hai Jiang, Jeff Brown, Dinesh M Purandare, Gary Hattersley, Fiona Garner
PURPOSE: Estrogen receptor-positive (ER+) breast cancers are typically treated with endocrine agents, and dependence on the ER pathway is often retained even after multiple rounds of anti-estrogen therapy. Selective estrogen receptor degraders (SERDs) are being developed as a strategy to more effectively target ER and exploit ER dependence in these cancers, which includes inhibiting both wild-type and mutant forms of ER. The purpose of this study was to evaluate the efficacy of a novel orally bioavailable SERD, elacestrant (RAD1901), in preclinical models of ER+ breast cancer...
May 4, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28472954/role-of-estrogen-receptors-and-src-signaling-in-mechanisms-of-bone-metastasis-by-estrogen-receptor-positive-breast-cancers
#10
Jen-Hwey Chiu, Che-Sheng Wen, Jir-You Wang, Chih-Yi Hsu, Yi-Fang Tsai, Shih-Chieh Hung, Ling-Ming Tseng, Yi-Ming Shyr
BACKGROUND/AIM: Evidence shows that Luminal A breast cancer is likely to undergo bone metastasis, but the mechanisms involved remain unknown. This study's aim was to demonstrate a correlation between estrogen receptor (ER) positivity and bone metastasis as the clinically preferred site of metastasis, as well as investigating the role of ERα-Src signaling in MCF-7 cells using Snail over-expression as an in vivo bone metastasis model. METHODS: Clinically, the records of breast cancer with distant metastasis were retrospectively reviewed to correlate breast cancer subtypes and preferential metastatic sites...
May 4, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28472101/estradiol-mediated-improvements-in-adipose-tissue-insulin-sensitivity-are-related-to-the-balance-of-adipose-tissue-estrogen-receptor-%C3%AE-and-%C3%AE-in-postmenopausal-women
#11
Young-Min Park, Rocio I Pereira, Christopher B Erickson, Tracy A Swibas, Kimberly A Cox-York, Rachael E Van Pelt
We recently demonstrated that short-term estradiol (E2) treatment improved insulin-mediated suppression of lipolysis in postmenopausal women, but to a greater extent in those who were late compared to early postmenopausal. In this follow-up study we tested whether subcutaneous adipose tissue (SAT) expression of estrogen receptors (ER) α and β differs between early and late postmenopausal women. We further tested whether the balance of ERα to ERβ in SAT determined the effect of E2 on SAT insulin sensitivity...
2017: PloS One
https://www.readbyqxmd.com/read/28445960/effect-of-folate-deficiency-on-promoter-methylation-and-gene-expression-of-esr1-cav1-and-elavl1-and-its-influence-on-spermatogenesis
#12
Hong-Fang Yuan, Kai Zhao, Yu Zang, Chun-Yan Liu, Zhi-Yong Hu, Jia-Jing Wei, Ting Zhou, Ying Li, Hui-Ping Zhang
This study aims to investigate the effect of folate deficiency on the male reproductive function and the underlying mechanism. A total of 269 screened participants from 421 recruitments were enrolled in this study. An animal model of folate deficiency was constructed. Folate concentration was measured in the ejaculate, and its association with semen parameters was then determined. The expression and promoter methylation status of ESR1, CAV1, and ELAVL1 were also evaluated. Results showed that seminal plasma folate level was significantly lower among subjects with azoospermia than those with normozoospermia...
April 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28439737/erratum-to-esr1-mutations-affect-anti-proliferative-responses-to-tamoxifen-through-enhanced-cross-talk-with-igf-signaling
#13
Luca Gelsomino, Guowei Gu, Yassine Rechoum, Amanda R Beyer, Sasha M Pejerrey, Anna Tsimelzon, Tao Wang, Kenneth Huffman, Andrew Ludlow, Sebastiano Andò, Suzanne A W Fuqua
No abstract text is available yet for this article.
April 24, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28433658/molecular-cloning-of-esr2-and-gene-expression-analysis-of-esr1-and-esr2-in-the-pituitary-gland-of-the-chinese-alligator-alligator-sinensis-during-female-reproductive-cycle
#14
Ruidong Zhang, Yanan Yin, Long Sun, Peng Yan, Yongkang Zhou, Rong Wu, Xiaobing Wu
Estrogens play critical roles in reproductive physiology via estrogen receptors (ESRs) in vertebrates, including reptiles. Chinese alligator (Alligator sinensis) is an endemic and endangered reptile species in China. In the present study, we cloned ESR2 gene from the ovary using rapid amplification of cDNA ends (RACE), investigated the spatial expression of ESRs in various tissues and temporal expression of ESRs in the pituitary glands during the reproductive cycle in Chinese alligators by quantitative real-time PCR (qPCR)...
April 19, 2017: Gene
https://www.readbyqxmd.com/read/28427772/seasonal-variations-of-aromatase-and-estrogen-receptors-expression-in-the-testis-of-free-ranging-sand-rats
#15
Rafik Menad, Souaâd Smaï, Xavier Bonnet, Thérèse Gernigon-Spychalowicz, Elara Moudilou, Farida Khammar, Jean-Marie Exbrayat
An increasing number of studies revealed the importance of estrogen in male reproduction. However, most research was conducted in laboratory rodents subjected to standardized environmental conditions. Therefore, seasonal regulations of estrogen pathways remain poorly understood under natural conditions. Using immunohistochemistry, the expression of several molecules involved in the functioning of testis (i.e. 17-β estradiol [E2], P450 aromatase, estrogen receptors ESR1, ESR2, and GPER1 [also known as GPR30]) were investigated in free-ranging fat sand rats, Psammomys obesus, during the breeding and resting seasons...
April 17, 2017: Acta Histochemica
https://www.readbyqxmd.com/read/28424560/an-exploratory-study-of-host-polymorphisms-in-genes-that-clinically-characterize-breast-cancer-tumors-and-pretreatment-cognitive-performance-in-breast-cancer-survivors
#16
Theresa A Koleck, Catherine M Bender, Beth Z Clark, Christopher M Ryan, Puja Ghotkar, Adam Brufsky, Priscilla F McAuliffe, Priya Rastogi, Susan M Sereika, Yvette P Conley
PURPOSE: Inspired by the hypothesis that heterogeneity in the biology of breast cancers at the cellular level may account for cognitive dysfunction symptom variability in survivors, the current study explored relationships between host single-nucleotide polymorphisms (SNPs) in 25 breast cancer-related candidate genes (AURKA, BAG1, BCL2, BIRC5, CCNB1, CD68, CENPA, CMC2, CTSL2, DIAPH3, ERBB2, ESR1, GRB7, GSTM1, MELK, MKI67, MMP11, MYBL2, NDC80, ORC6, PGR, RACGAP1, RFC4, RRM2, and SCUBE2), identified from clinically relevant prognostic multigene-expression profiles for breast cancer, and pretreatment cognitive performance...
2017: Breast Cancer: Targets and Therapy
https://www.readbyqxmd.com/read/28423734/gata3-and-trps1-are-distinct-biomarkers-and-prognostic-factors-in-breast-cancer-database-mining-for-gata-family-members-in-malignancies
#17
Hao-Yu Lin, De Zeng, Yuan-Ke Liang, Xiao-Long Wei, Chun-Fa Chen
GATA transcription factors are zinc finger DNA binding proteins that activate transcription during development and cell differentiation. To date, 7 members of GATA family have been reported. However, the expression patterns and the exact roles of distinct GATA family members contributing to tumorigenesis and progression of breast cancer (BC) remain to be elucidated. Here, we studied the expression of GATA transcripts in a variety of tumor types compared with the normal controls using the ONCOMINE and GOBO databases, along with their corresponding expression profiles in an array of cancer cell lines through CCLE analysis...
March 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/28420808/sequence-variations-in-estrogen-receptor-1-and-2-genes-and-their-association-with-egg-production-traits-in-chinese-dagu-chickens
#18
Xiaotian Niu, Thobela Louis Tyasi, Ning Qin, Dehui Liu, Hongyan Zhu, Xiaoxia Chen, Fengwei Zhang, Shuguo Yuan, Rifu Xu
Estrogen receptors α (ESR1) and β (ESR2) play central roles in folliculogenesis, and therefore in reproductive biology. In the present study, two single nucleotide polymorphisms (SNPs) were identified in the ESR1 and ESR2 genes using PCR-single strand conformation polymorphism (PCR-SSCP) and DNA sequencing. One of the identified SNPs, a T1101C transition located within exon 4 of the ESR1 gene, was significantly associated with hen-housed egg production (HHEP) at 30, 43, 57 and 66 weeks of age (P<0.05), and egg weight (EW) at 30 weeks (P<0...
April 15, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28419445/activation-of-clc-3-chloride-channel-by-17%C3%AE-estradiol-relies-on-the-estrogen-receptor-%C3%AE-expression-in-breast-cancer
#19
Haifeng Yang, Lianshun Ma, Yawei Wang, Wanhong Zuo, Bingxue Li, Yaping Yang, Yehui Chen, Lixin Chen, Liwei Wang, Linyan Zhu
Although extensively studied, the mechanisms by which estrogen promotes breast cancer growth remain to be fully elucidated. Tamoxifen, an antiestrogen to treat ERα+ breast cancer, is also a high-affinity blocker of the chloride channels. In this study, we explored the involvement of the chloride channels in the action of estrogen in breast cancer. We found that 17β-estradiol (17β-E2) concentration-dependently activated the chloride currents in ERα+ breast cancer MCF-7 cells. Extracellular hypertonic challenge and chloride channel blockers, NPPB and DIDS inhibited the 17β-E2-activated chloride currents...
April 17, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28414719/crucial-role-of-estrogen-for-the-mammalian-female-in-regulating-semen-coagulation-and-liquefaction-in-vivo
#20
Shuai Li, Marleny Garcia, Rachel L Gewiss, Wipawee Winuthayanon
Semen liquefaction changes semen from a gel-like to watery consistency and is required for sperm to gain mobility and swim to the fertilization site in the Fallopian tubes. Kallikrein-related peptidases 3 (KLK3) and other kallikrein-related peptidases from male prostate glands are responsible for semen liquefaction by cleaving gel-forming proteins (semenogelin and collagen). In a physiological context, the liquefaction process occurs within the female reproductive tract. How seminal proteins interact with the female reproductive environment is still largely unexplored...
April 2017: PLoS Genetics
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