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Estrogen and breast cancer

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https://www.readbyqxmd.com/read/28088469/estrogen-induced-expression-of-tissue-factor-pathway-inhibitor-2-in-mcf7-cells-involves-lysine-specific-demethylase-1
#1
Marianne S Andresen, Huda Omar Ali, Christiane Filion Myklebust, Per Morten Sandset, Benedicte Stavik, Nina Iversen, Grethe Skretting
Hormone-sensitive cancers can be influenced by estrogens, a process usually mediated through the estrogen receptor (ER). Tissue factor pathway inhibitor type 2 (TFPI-2) is a Kunitz-type serine protease inhibitor involved in regulating the extracellular matrix. The present study demonstrates that the expression of TFPI-2 can be induced by estrogens. Breast cancer data from GOBO displayed increased levels of TFPI-2 and increased survival in patients with ERα+ tumors. Treatment of MCF7 cells (ERα+) with 17β-estradiol (E2) or 17α-ethinyl estradiol (EE2) increased TFPI-2 mRNA and protein levels...
January 11, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28087820/emerging-functional-roles-of-nuclear-receptors-in-breast-cancer
#2
Tram B Doan, Justine Graham, Christine Clarke
Nuclear receptors (NRs) have been targets of intensive drug development for decades due to their roles as key regulators of multiple developmental, physiological and disease processes. In breast cancer, expression of the estrogen and progesterone receptor remains clinically important in predicting prognosis and determining therapeutic strategies. More recently, there is growing evidence supporting the involvement of multiple nuclear receptors other than the estrogen and progesterone receptors, in the regulation of various processes important to the initiation and progression of breast cancer...
January 13, 2017: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/28087608/diabetes-abnormal-glucose-dyslipidemia-hypertension-and-risk-of-inflammatory-and-other-breast-cancer
#3
Catherine Schairer, Shahinaz M Gadalla, Ruth M Pfeiffer, Steven C Moore, Eric A Engels
BACKGROUND: Obesity has been associated with substantially higher risk of inflammatory breast cancer (IBC) than other breast cancer. Here, we assess whether comorbidities of obesity, namely diabetes, abnormal glucose, dyslipidemia, and hypertension, are differentially related to risk of inflammatory breast cancer and other breast cancers by tumor stage at diagnosis (localized/regional/distant/unstaged). METHODS: We used linked SEER-Medicare data, with female breast cancer cases aged 66+ years identified by SEER registries (years 1992-2011)...
January 13, 2017: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/28087261/dna-aptamer-probes-for-detection-of-estrogen-receptor-%C3%AE-positive-carcinomas
#4
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/28086982/reproductive-factors-and-the-risk-of-triple-negative-breast-cancer-in-white-women-and-african-american-women-a-pooled-analysis
#5
Huiyan Ma, Giske Ursin, Xinxin Xu, Eunjung Lee, Kayo Togawa, Lei Duan, Yani Lu, Kathleen E Malone, Polly A Marchbanks, Jill A McDonald, Michael S Simon, Suzanne G Folger, Jane Sullivan-Halley, Dennis M Deapen, Michael F Press, Leslie Bernstein
BACKGROUND: Early age at menarche, nulliparity, late age at first completed pregnancy, and never having breastfed, are established breast cancer risk factors. However, among breast cancer subtypes, it remains unclear whether all of these are risk factors for triple-negative breast cancer (TNBC). METHODS: We evaluated the associations of these reproductive factors with TNBC, in 2658 patients with breast cancer (including 554 with TNBC) and 2448 controls aged 20-64 years, who participated in one of the three population-based case-control studies: the Women's Contraceptive and Reproductive Experiences Study, the Women's Breast Carcinoma in situ Study, or the Women's Learning the Influence of Family and Environment Study...
January 13, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/28086829/genomic-pathways-modulated-by-twist-in-breast-cancer
#6
Farhad Vesuna, Yehudit Bergman, Venu Raman
BACKGROUND: The basic helix-loop-helix transcription factor TWIST1 (Twist) is involved in embryonic cell lineage determination and mesodermal differentiation. There is evidence to indicate that Twist expression plays a role in breast tumor formation and metastasis, but the role of Twist in dysregulating pathways that drive the metastatic cascade is unclear. Moreover, many of the genes and pathways dysregulated by Twist in cell lines and mouse models have not been validated against data obtained from larger, independant datasets of breast cancer patients...
January 13, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28079144/igf-ir-cooperates-with-er%C3%AE-to-inhibit-breast-cancer-cell-aggressiveness-by-regulating-the-expression-and-localisation-of-ecm-molecules
#7
Nikolaos A Afratis, Panagiotis Bouris, Spyros S Skandalis, Hinke A Multhaupt, John R Couchman, Achilleas D Theocharis, Nikos K Karamanos
IGF-IR is highly associated with the behaviour of breast cancer cells. In ERα-positive breast cancer, IGF-IR is present at high levels. In clinical practice, prolonged treatment with anti-estrogen agents results in resistance to the therapy with activation of alternative signaling pathways. Receptor Tyrosine Kinases, and especially IGF-IR, have crucial roles in these processes. Here, we report a nodal role of IGF-IR in the regulation of ERα-positive breast cancer cell aggressiveness and the regulation of expression levels of several extracellular matrix molecules...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28079011/molecular-mechanisms-of-anticancer-effects-of-phytoestrogens-in-breast-cancer
#8
Chia-Jung Hsieh, Ya-Ling Hsu, Ya-Fang Huang, Eing-Mei Tsai
Phytoestrogens derived from plants exert estrogenic as well as antiestrogenic effects and multiple actions within breast cancer cells. Chemopreventive properties of phytoestrogens have emerged from epidemiological observations. In recent clinical research studies, phytoestrogens are safe and may even protect against breast cancer. In this brief review, the molecular mechanisms of phytoestrogens on regulation of cell cycle, apoptosis, estrogen receptors, cell signaling pathways, and epigenetic modulations in relation to breast cancer are discussed...
January 11, 2017: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/28078854/changes-of-expression-of-estrogen-and-progestrone-receptors-human-epithelial-growth-factor-receptor-2-and-ki-67-after-neoadjuvant-chemotherapy-in-the-treatment-of-breast-cancer
#9
M L Li, Y Dong, S L Luan, Z H Zhao, F L Ning
Recent studies suggest that the development and prognosis of breast cancer is in close correlation to molecular subtype of breast cancer. Neoadjuvant chemotherapy has been extensively applied in the treatment of local breast cancer in advanced stage. In order to verify the correlation between expression changes of estrogen receptor, progestrone receptor, human epithelial growth factor receptor 2 and Ki-67 after neoadjuvant chemotherapy and neoadjuvant chemotherapy, we studied 120 patients with stage IIAIIIC breast cancer who underwent neoadjuvant chemotherapy in Binzhou Medical University Hospital, Shandong, China from February 2011 to February 2015...
October 2016: Journal of Biological Regulators and Homeostatic Agents
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
#10
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/28077810/increased-expression-of-long-non-coding-rna-bcar4-is-predictive-of-poor-prognosis-in-patients-with-non-small-cell-lung-cancer
#11
Jianhua Gong, Han Zhang, Li He, Lixin Wang, Jipeng Wang
Lung cancer is the most common human cancer, and the majority of lung cancer cases are categorized as non-small cell lung cancer (NSCLC). Long non-coding RNAs (lncRNAs) play key roles in the development and progression of human cancers. LncRNA breast cancer anti-estrogen resistance 4 (BCAR4) has been identified as an oncogenic lncRNA involved in the progression of breast cancer and osteosarcoma. However, the clinical significance of the lncRNA BCAR4 in NSCLC remains largely unclear. In the present study, real-time quantitative reverse transcriptase-polymerase chain reaction was used to examine the relative level of lncRNA BCAR4 in 68 cases of NSCLC tissues and their adjacent non-tumor tissues...
2017: Tohoku Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28076434/diabetes-and-breast-cancer-subtypes
#12
Heleen K Bronsveld, Vibeke Jensen, Pernille Vahl, Marie L De Bruin, Sten Cornelissen, Joyce Sanders, Anssi Auvinen, Jari Haukka, Morten Andersen, Peter Vestergaard, Marjanka K Schmidt
BACKGROUND: Women with diabetes have a worse survival after breast cancer diagnosis compared to women without diabetes. This may be due to a different etiological profile, leading to the development of more aggressive breast cancer subtypes. Our aim was to investigate whether insulin and non-insulin treated women with diabetes develop specific clinicopathological breast cancer subtypes compared to women without diabetes. METHODS AND FINDINGS: This cross-sectional study included randomly selected patients with invasive breast cancer diagnosed in 2000-2010...
2017: PloS One
https://www.readbyqxmd.com/read/28076334/establishment-of-a-normal-derived-estrogen-receptor-positive-cell-line-comparable-to-the-prevailing-human-breast-cancer-subtype
#13
Branden M Hopkinson, Marie C Klitgaard, Ole William Petersen, René Villadsen, Lone Rønnov-Jessen, Jiyoung Kim
Understanding human cancer increasingly relies on insight gained from subtype specific comparisons between malignant and non-malignant cells. The most frequent subtype in breast cancer is the luminal. By far the most frequently used model for luminal breast cancer is the iconic estrogen receptor-positive (ERpos) MCF7 cell line. However, luminal specific comparisons have suffered from the lack of a relevant non-malignant counterpart. Our previous work has shown that transforming growth factor-β receptor (TGFβR) inhibition suffices to propagate prospectively isolated ERpos human breast luminal cells from reduction mammoplasties (HBEC)...
January 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/28076321/secretion-modification-region-derived-peptide-blocks-exosome-release-and-mediates-cell-cycle-arrest-in-breast-cancer-cells
#14
Ming-Bo Huang, Ruben R Gonzalez, James Lillard, Vincent C Bond
PURPOSE: Discovery and development of a novel anticancer PEG-SMR-Clu peptide to prevent breast cancer metastasis. How breast cancer cells and primary mammary epithelial cells interact and communicate with each other to promote tumorigenesis and how to prevent tumor metastasis has long been a concern of researchers. Cancer cells secrete exosomes containing proteins and RNA. These factors can influence tumor development by directly targeting cancer cells and tumor stroma. In this study, we determined the effects of a peptide as an inhibitor of exosome secretion on breast tumors...
January 5, 2017: Oncotarget
https://www.readbyqxmd.com/read/28075498/tamoxifen-and-its-active-metabolites-inhibit-dopamine-transporter-function-independently-of-the-estrogen-receptors
#15
Sarah R Mikelman, Bipasha Guptaroy, Margaret Gnegy
As one of the primary mechanisms by which dopamine signaling is regulated, the dopamine transporter (DAT) is an attractive pharmacological target for the treatment of diseases based in dopaminergic dysfunction. In this work we demonstrate for the first time that the commonly prescribed breast cancer therapeutic tamoxifen and its major metabolites, 4-hydroxytamoxifen and endoxifen, inhibit DAT function. Tamoxifen inhibits [(3) H]dopamine uptake into hDAT-N2A cells via an uncompetitive or mixed mechanism. Endoxifen, an active metabolite of tamoxifen, asymmetrically inhibits DAT function in hDAT-N2A cells, showing a preference for the inhibition of amphetamine-stimulated dopamine efflux as compared to dopamine uptake...
January 11, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28074989/-antidepressants-agents-in-breast-cancer-patients-using-tamoxifen-review-of-basic-and-clinical-evidence
#16
María Elisa Irarrázaval O, Leonardo Gaete G
Tamoxifen (Tmf), is a standard of care for women with estrogen receptor positive (ER+) breast cancer. Endoxifen is a Tmf metabolite generated by cytochrome P450 2D6 (CYP2D6). Antidepressive agents (AD) are often prescribed to women with breast cancer not only for depression, but also for anxiety and hot flashes. Some AD are substrates or inhibitors of the Tmf metabolic pathway. Therefore there may be interactions when Tmf and AD are prescribed simultaneously. Oncologic protection afforded by Tmf may become less effective or null when AD are indicated, especially in poor metabolizing patients...
October 2016: Revista Médica de Chile
https://www.readbyqxmd.com/read/28074330/comparison-of-core-needle-biopsy-and-excision-specimens-for-the-accurate-evaluation-of-breast-cancer-molecular-markers-a-report-of-1003-cases
#17
Jie Chen, Zu Wang, Qing Lv, Zhenggui Du, Qiuwen Tan, Di Zhang, Bingjun Xiong, Helin Zeng, Juxiang Gou
In this study, we compared the accuracy of marker evaluation in core needle biopsy (CNB) specimens versus excision specimens (ESs) from breast cancer patients. This retrospective study used data collected from the breast cancer database at the West China Hospital, China. Immunohistochemistry (IHC) results from CNB specimens and ESs were compared, using estrogen receptor (ER), progesterone receptor (PR), human epidermal growth factor receptor 2 (HER2), and Ki-67 as markers. Molecular subtyping and endocrine therapy usage correlations based on CNB samples and ESs were evaluated...
January 10, 2017: Pathology Oncology Research: POR
https://www.readbyqxmd.com/read/28074314/a-novel-effect-of-%C3%AE-adrenergic-receptor-on-mammary-branching-morphogenesis-and-its-possible-implications-in-breast-cancer
#18
Lucía Gargiulo, María May, Ezequiel M Rivero, Sabrina Copsel, Caroline Lamb, John Lydon, Carlos Davio, Claudia Lanari, Isabel A Lüthy, Ariana Bruzzone
Understanding the mechanisms that govern normal mammary gland development is crucial to the comprehension of breast cancer etiology. β-adrenergic receptors (β-AR) are targets of endogenous catecholamines such as epinephrine that have gained importance in the context of cancer biology. Differences in β2-AR expression levels may be responsible for the effects of epinephrine on tumor vs non-tumorigenic breast cell lines, the latter expressing higher levels of β2-AR. To study regulation of the breast cell phenotype by β2-AR, we over-expressed β2-AR in MCF-7 breast cancer cells and knocked-down the receptor in non-tumorigenic MCF-10A breast cells...
January 11, 2017: Journal of Mammary Gland Biology and Neoplasia
https://www.readbyqxmd.com/read/28072609/the-impact-of-estrogen-alone-hormone-therapy-on-breast-cancer-risk-and-health-outcomes-reassurance-for-the-treatment-of-climacteric-symptoms-in-black-women
#19
Aaron K Styer
No abstract text is available yet for this article.
January 9, 2017: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/28071616/presenting-features-treatment-patterns-and-outcomes-of-patients-with-breast-cancer-in-pakistan-experience-at-a-university-hospital
#20
S Kumar, A J Shaikh, Y A Rashid, N Masood, Atv Mohammed, U Z Malik, G Haider, N Niamutullah, S Khan
BACKGROUND: Breast cancer is the most common cancer in Pakistani women. We report the presenting features, treatment patterns and survival of breast cancer from a University Hospital in Southern Pakistan and compare the data with international population based studies. MATERIALS AND METHODS: Medical records of patients diagnosed to have breast cancer between January 1999 and November 2008 were reviewed retrospectively. RESULTS: A total of 845 patients were identified...
April 2016: Indian Journal of Cancer
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