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https://www.readbyqxmd.com/read/28089583/association-of-prenatal-and-childhood-pbde-exposure-with-timing-of-puberty-in-boys-and-girls
#1
Kim G Harley, Stephen A Rauch, Jonathan Chevrier, Katherine Kogut, Kimberly L Parra, Celina Trujillo, Robert H Lustig, Louise C Greenspan, Andreas Sjödin, Asa Bradman, Brenda Eskenazi
BACKGROUND: Polybrominated diphenyl ether (PBDE) flame retardants are endocrine-disrupting chemicals that exhibit estrogenic and androgenic properties and may affect pubertal timing. METHODS: Study subjects were participants between 1999 and 2013 in the Center for the Health Assessment of Mothers and Children of Salinas (CHAMACOS), a longitudinal cohort study of predominantly Mexican origin families in Northern California. We measured serum concentrations of four PBDEs (BDE-47, -99, -100, -153) in blood collected from mothers during pregnancy (N=263) and their children at age 9years (N=522)...
January 12, 2017: Environment International
https://www.readbyqxmd.com/read/28086790/rna-sequencing-for-global-gene-expression-associated-with-muscle-growth-in-a-single-male-modern-broiler-line-compared-to-a-foundational-barred-plymouth-rock-chicken-line
#2
Byung-Whi Kong, Nicholas Hudson, Dongwon Seo, Seok Lee, Bhuwan Khatri, Kentu Lassiter, Devin Cook, Alissa Piekarski, Sami Dridi, Nicholas Anthony, Walter Bottje
BACKGROUND: Modern broiler chickens exhibit very rapid growth and high feed efficiency compared to unselected chicken breeds. The improved production efficiency in modern broiler chickens was achieved by the intensive genetic selection for meat production. This study was designed to investigate the genetic alterations accumulated in modern broiler breeder lines during selective breeding conducted over several decades. METHODS: To identify genes important in determining muscle growth and feed efficiency in broilers, RNA sequencing (RNAseq) was conducted with breast muscle in modern pedigree male (PeM) broilers (n = 6 per group), and with an unselected foundation broiler line (Barred Plymouth Rock; BPR)...
January 13, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28067809/expression-and-clinical-significance-of-androgen-receptor-in-triple-negative-breast-cancer
#3
Yuka Asano, Shinichiro Kashiwagi, Wataru Goto, Sayaka Tanaka, Tamami Morisaki, Tsutomu Takashima, Satoru Noda, Naoyoshi Onoda, Masahiko Ohsawa, Kosei Hirakawa, Masaichi Ohira
BACKGROUND: Triple-negative breast cancer (TNBC) has a poor prognosis because of frequent recurrence. Androgen receptor (AR) is involved in the pathogenesis of breast cancer, but its role is not clearly defined. The aim of this study was to explore the expression of AR and its relationship with clinicopathologic features in TNBC. METHODS: This study investigated 1036 cases of sporadic invasive breast carcinoma. Immunohistochemical assays were performed to determine the expression of AR in 190 TNBC samples...
January 6, 2017: Cancers
https://www.readbyqxmd.com/read/28062545/a-review-of-estrogen-receptor-androgen-receptor-genomics-in-male-breast-cancer
#4
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/28060723/the-effect-of-androgen-receptor-expression-on-clinical-characterization-of-metastatic-breast-cancer
#5
Ji-Yeon Kim, Kyunghee Park, Eunjin Lee, Hae Hyun Jung, Jin Seok Ahn, Young-Hyuck Im, Woong-Yang Park, Yeon Hee Park
In breast cancer (BC), androgen receptor (AR) expression is related to estrogen receptor (ER) and/or progesterone receptor (PgR) expression. AR expression is an indicator of good prognosis in breast cancer regardless of hormone receptor (HR) status. In this study, we evaluated the effect of AR-related gene expression on clinical characterization of metastatic BC. We performed RNA-Seq to evaluate gene expression using mRNA extracted from 37 patients with metastatic BC. Intrinsic subtype prediction, analysis of differential gene expression, and gene set enrichment pathway analysis were then performed...
January 2, 2017: Oncotarget
https://www.readbyqxmd.com/read/28050375/androgen-receptor-expression-in-breast-carcinoma-of-egyptian-patients
#6
Rehab Monir Samaka, Sheren Fouad Younes
INTRODUCTION: Breast carcinoma (BC) is a heterogeneous disease, with distinctive molecular sub-types, influencing BC patients prognosis and therapeutic options. Androgen Receptor (AR) is a steroid nuclear receptor involved in complex signaling pathways, that are thought to play a role in cell proliferation. AR expression in relation to different molecular sub-types of BC is not clearly understood. AIM: The aim of this study was to evaluate the expression of AR in BC from Egyptian patients and correlate it with the standard clinico-pathologic variables, molecular sub-type of BC and the Overall Survival (OS)...
November 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28035996/novel-nine-exon-ar-transcripts-exon-1-exon-1b-exons-2-8-in-normal-and-cancerous-breast-and-prostate-cells
#7
Dong Gui Hu, Ross A McKinnon, Julie-Ann Hulin, Peter I Mackenzie, Robyn Meech
Nearly 20 different transcripts of the human androgen receptor (AR) are reported with two currently listed as Refseq isoforms in the NCBI database. Isoform 1 encodes wild-type AR (type 1 AR) and isoform 2 encodes the variant AR45 (type 2 AR). Both variants contain eight exons: they share common exons 2-8 but differ in exon 1 with the canonical exon 1 in isoform 1 and the variant exon 1b in isoform 2. Splicing of exon 1 or exon 1b is reported to be mutually exclusive. In this study, we identified a novel exon 1b (1b/TAG) that contains an additional TAG trinucleotide upstream of exon 1b...
December 27, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28028198/sex-dependent-regulation-of-aromatase-mediated-synaptic-plasticity-in-the-basolateral-amygdala
#8
Roland A Bender, Lepu Zhou, Ricardo Vierk, Nicola Brandt, Alexander Keller, Christine E Gee, Michael K E Schäfer, Gabriele M Rune
: The basolateral amygdala (BLA) integrates sensory input from cortical and subcortical regions, a function that requires marked synaptic plasticity. Here we provide evidence that cytochrome P450 aromatase (AROM), the enzyme converting testosterone to 17β-estradiol (E2), contributes to the regulation of this plasticity in a sex-specific manner. We show that AROM is expressed in the BLA, particularly in the basolateral nucleus (BL), in male and female rodents. Systemic administration of the AROM-inhibitor letrozole reduced spine synapse density in the BL of adult female mice, but not in the BL of male mice...
December 27, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28027454/apocrine-carcinoma-of-the-breast-a-brief-update-on-the-molecular-features-and-targetable-biomarkers
#9
REVIEW
Semir Vranic, Rebecca Feldman, Zoran Gatalica
Apocrine carcinoma of the breast is a rare, primary breast cancer characterized by the apocrine morphology, estrogen receptor-negative and androgen receptor-positive profile with a frequent overexpression of Her-2/neu protein (~30%). Apart from the Her-2/neu target, advanced and/or metastatic apocrine carcinomas have limited treatment options. In this review, we briefly describe and discuss the molecular features and new theranostic biomarkers for this rare mammary malignancy. The importance of comprehensive profiling is highlighted due to synergistic and potentially antagonistic molecular events in the individual patients...
December 21, 2016: Bosnian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28024968/assessing-the-variability-in-insurance-coverage-transparency-for-male-sexual-health-conditions-in-the-united-states
#10
Brian V Le, Sarah McAchran, David Paolone, Daniel R Gralneck, Daniel Williams, Wade Bushman
OBJECTIVES: To determine the degree of transparency of health insurer policies regarding coverage of male sexual health conditions, we examined the publicly available policy coverage documents of the largest US medical insurance plans. METHODS: We selected two index patients across the male sexual health spectrum: (1) a PDE5 refractory erectile dysfunction patient requiring intracavernosal injection therapy or penile prosthesis, (2) a 50 yo male patient with laboratory-confirmed, symptomatic hypogonadism requiring testosterone replacement therapy as defined by endocrine society criteria...
December 23, 2016: Urology
https://www.readbyqxmd.com/read/27994732/development-of-n-4-phenoxyphenyl-benzenesulfonamide-derivatives-as-novel-nonsteroidal-progesterone-receptor-antagonists
#11
Ayumi Yamada, Yuko Kazui, Hiromasa Yoshioka, Aya Tanatani, Shuichi Mori, Hiroyuki Kagechika, Shinya Fujii
We report here development of N-(4-phenoxyphenyl)benzenesulfonamide derivatives as a novel class of nonsteroidal progesterone receptor (PR) antagonists. PR plays key roles in various physiological systems, including the female reproductive system, and PR antagonists are candidates for clinical treatment of multiple diseases, including uterine leiomyoma, endometriosis, breast cancer, and some psychiatric disorders. We found that the benzenesulfonanilide skeleton functions as a novel scaffold for PR antagonists, and we adopted 3-chlorobenzenesulfonyl derivative 20a as a lead compound for structural development...
December 8, 2016: ACS Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/27994514/the-correlation-between-parp1-and-brca1-in-ar-positive-triple-negative-breast-cancer
#12
Jiayan Luo, Juan Jin, Fang Yang, Zijia Sun, Wenwen Zhang, Yaqin Shi, Jing Xu, Xiaoxiang Guan
Triple-negative breast cancer (TNBC) lacks estrogen receptor (ER), progesterone receptor (PR) and human epidermal growth factor receptor 2 (HER-2) expression and thus cannot benefit from conventional hormonal or anti-HER2 targeted therapies. Anti-androgen therapy has shown a certain effect on androgen receptor (AR) positive TNBC. The emerging researches have proved that poly (ADP-ribose) polymerase (PARP) inhibitor is effective in BRCA1-deficient breast cancers. We demonstrated that combination of AR antagonist (bicalutamide) and PARP inhibitor (ABT-888) could inhibit cell viability and induce cell apoptosis significantly whatever in vitro or in vivo setting in AR-positive TNBC...
2016: International Journal of Biological Sciences
https://www.readbyqxmd.com/read/27992601/a-novel-functional-domain-of-tab2-involved-in-the-interaction-with-estrogen-receptor-alpha-in-breast-cancer-cells
#13
Stefania Reineri, Silvia Agati, Valentina Miano, Monica Sani, Paola Berchialla, Laura Ricci, Andrea Iannello, Lucia Coscujuela Tarrero, Santina Cutrupi, Michele De Bortoli
Tab2, originally described as a component of the inflammatory pathway, has been implicated in phenomena of gene de-repression in several contexts, due to its ability to interact with the NCoR corepressor. Tab2 interacts also with steroid receptors and dismisses NCoR from antagonist-bound Estrogen and Androgen Receptors on gene regulatory regions, thus modifying their transcriptional activity and leading to pharmacological resistance in breast and prostate cancer cells. We demonstrated previously that either Tab2 knock-down, or a peptide mimicking the Estrogen Receptor alpha domain interacting with Tab2, restore the antiproliferative response to Tamoxifen in Tamoxifen-resistant breast cancer cells...
2016: PloS One
https://www.readbyqxmd.com/read/27980106/imatinib-spares-ckit-expressing-prostate-neuroendocrine-tumors-whereas-kills-seminal-vesicle-epithelial-stromal-tumors-targeting-pdgfr-%C3%AE
#14
Elena Jachetti, Alice Rigoni, Lucia Bongiovanni, Ivano Arioli, Laura Botti, Mariella Parenza, Valeria Cancila, Claudia Chiodoni, Fabrizio Festinese, Matteo Bellone, Regina Tardanico, Claudio Tripodo, Mario P Colombo
Prostate cancer is a leading cause of death by cancer in male worldwide. Indeed, advanced and metastatic disease characterized by androgen resistance and often associated with neuroendocrine (NE) differentiation remains incurable. Using the spontaneous prostate cancer TRAMP model, we have shown that mast cells (MCs) support in vivo the growth of prostate adenocarcinoma, whereas their genetic or pharmacologic targeting favours prostate NE cancer arousal. Aiming at simultaneously targeting prostate NE tumor cells and MCs, both expressing the cKit tyrosine kinase receptor, we have tested the therapeutic effect of Imatinib in TRAMP mice...
December 15, 2016: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/27979317/estrogen-receptor-%C3%AE-as-a-pharmaceutical-target
#15
REVIEW
Margaret Warner, Bo Huang, Jan-Ake Gustafsson
A major issue in clinical endocrinology today is how to use hormones to achieve the health benefits that they clearly can provide but avoid the negative side effects, that is, how to develop more precise medicines. This problem of how to use hormones is pervasive in clinical endocrinology. It is true for estrogen, progesterone, androgen, vitamin D, and thyroid hormone, and the problem is amplified in the case of new ligands for the more recently discovered nuclear receptors. Selective targeting of hormone receptor subtypes is one attractive way to harness the beneficial effects of hormones while reducing unwanted side effects...
January 2017: Trends in Pharmacological Sciences
https://www.readbyqxmd.com/read/27959398/differential-microrna-expression-is-associated-with-androgen-receptor-expression-in-breast-cancer
#16
Yaqin Shi, Fang Yang, Zijia Sun, Wenwen Zhang, Jun Gu, Xiaoxiang Guan
The androgen receptor (AR) is frequently expressed in breast cancer; however, its prognostic value remains unclear. AR expression in breast cancer has been associated with improved outcomes in estrogen receptor (ER)‑positive breast cancer compared with ER‑negative disease. Eliminating AR function in breast cancer is critically important for breast cancer progression. However, the mechanism underlying AR regulation remains poorly understood. The study of microRNAs (miRNAs) has provided important insights into the pathogenesis of hormone‑dependent cancer...
January 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27956712/induction-of-integrin-signaling-by-steroid-sulfatase-in-human-cervical-cancer-cells
#17
Dong-Jin Ye, Yeo-Jung Kwon, Sangyun Shin, Hyoung-Seok Baek, Dong-Won Shin, Young-Jin Chun
Steroid sulfatase (STS) is an enzyme responsible for the hydrolysis of aryl and alkyl sulfates. STS plays a pivotal role in the regulation of estrogens and androgens that promote the growth of hormone-dependent tumors, such as those of breast or prostate cancer. However, the molecular function of STS in tumor growth is still not clear. To elucidate the role of STS in cancer cell proliferation, we investigated whether STS is able to regulate the integrin signaling pathway. We found that overexpression of STS in HeLa cells increases the protein and mRNA levels of integrin β1 and fibronectin, a ligand of integrin α5β1...
December 13, 2016: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/27939063/molecular-alterations-in-triple-negative-breast-cancer-the-road-to-new-treatment-strategies
#18
REVIEW
Carsten Denkert, Cornelia Liedtke, Andrew Tutt, Gunter von Minckwitz
Triple-negative breast cancer is a heterogeneous disease and specific therapies have not been available for a long time. Therefore, conventional chemotherapy is still considered the clinical state of the art. Different subgroups of triple-negative breast cancer have been identified on the basis of protein expression, mRNA signatures, and genomic alterations. Important elements of triple-negative breast cancer biology include high proliferative activity, an increased immunological infiltrate, a basal-like and a mesenchymal phenotype, and deficiency in homologous recombination, which is in part associated with loss of BRCA1 or BRCA2 function...
December 6, 2016: Lancet
https://www.readbyqxmd.com/read/27927199/sh003-induces-apoptosis-of-du145-prostate-cancer-cells-by-inhibiting-erk-involved-pathway
#19
Yu-Jeong Choi, Youn Kyung Choi, Kang Min Lee, Sung-Gook Cho, Soo-Yeon Kang, Seong-Gyu Ko
BACKGROUND: Herbal medicines have been used in cancer treatment, with many exhibiting favorable side effect and toxicity profiles compared with conventional chemotherapeutic agents. SH003 is a novel extract from Astragalus membranaceus, Angelica gigas, and Trichosanthes Kirilowii Maximowicz combined at a 1:1:1 ratio that impairs the growth of breast cancer cells. This study investigates anti-cancer effects of SH003 in prostate cancer cells. METHODS: SH003 extract in 30% ethanol was used to treat the prostate cancer cell lines DU145, LNCaP, and PC-3...
December 7, 2016: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/27918430/androgen-receptor-a-complex-therapeutic-target-for-breast-cancer
#20
REVIEW
Ramesh Narayanan, James T Dalton
Molecular and histopathological profiling have classified breast cancer into multiple sub-types empowering precision treatment. Although estrogen receptor (ER) and human epidermal growth factor receptor (HER2) are the mainstay therapeutic targets in breast cancer, the androgen receptor (AR) is evolving as a molecular target for cancers that have developed resistance to conventional treatments. The high expression of AR in breast cancer and recent discovery and development of new nonsteroidal drugs targeting the AR provide a strong rationale for exploring it again as a therapeutic target in this disease...
December 2, 2016: Cancers
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