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https://www.readbyqxmd.com/read/29352368/endocrine-therapy-and-related-issues-in-hormone-receptor-positive-early-breast-cancer-a-roundtable-discussion-by-the-breast-cancer-therapy-expert-group-bcteg
#1
REVIEW
Jame Abraham, Humberto Caldera, Robert Coleman, Anthony Elias, Matthew P Goetz, Muaiad Kittaneh, Elyse Lower, Reshma Mahtani, E Terry Mamounas, Mark Pegram, Hope Rugo, Lee Schwartzberg, Tiffany Traina, Chuck Vogel
PURPOSE: Management of breast cancer is a rapidly evolving field, and, although evidence-based guidelines are available for clinicians to provide direction on critical issues in patient care, clinicians often left to address these issues in the context of community practice situations with their patients. These include the patient's comorbid conditions, actual versus perceived benefit of treatments, patient's compliance as well as financial/reimbursement issues, and long-term tolerability of therapy...
January 19, 2018: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/29345963/deletion-of-estrogen-receptor-alpha-in-skeletal-muscle-results-in-impaired-contractility-in-female-mice
#2
Brittany C Collins, Tara L Mader, Christine A Cabelka, Melissa R Iñigo, Espen E Spangenburg, Dawn A Lowe
Estradiol deficiency in females can result in skeletal muscle strength loss, and treatment with estradiol mitigates the loss. There are three primary estrogen receptors and estradiol elicits effects through these receptors in various tissues. Ubiquitous estrogen receptor α (ERα) knockout mice exhibit numerous biological disorders, but little is known regarding the specific role of ERα in skeletal muscle contractile function. The purpose of this study was to determine the impact of skeletal muscle specific ERα deletion on contractile function, hypothesizing that ERα is a main receptor through which estradiol affects muscle strength in females...
January 18, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29345736/palbociclib-in-combination-with-letrozole-as-first-line-treatment-for-advanced-breast-cancer-a-japanese-phase-ii-study
#3
Norikazu Masuda, Reiki Nishimura, Masato Takahashi, Kenichi Inoue, Shinji Ohno, Hiroji Iwata, Yuko Mori, Satoshi Hashigaki, Yasuaki Muramatsu, Takashi Nagasawa, Yoshiko Umeyama, Masakazu Toi
This single-arm, open-label, phase II study in 42 Japanese postmenopausal patients with estrogen receptor-positive/human epidermal growth factor receptor 2-negative (ER+/HER2-) advanced breast cancer evaluated the efficacy, safety, and pharmacokinetics of first-line palbociclib (125 mg once daily, 3 weeks on/1 week off) coadministered with letrozole (2.5 mg once daily). The primary endpoint of investigator-assessed 1-year progression-free survival probability was 75.0% (90% CI, 61.3%-84.4%), far surpassing the 40% lower limit of the 90% CI supporting efficacy...
January 18, 2018: Cancer Science
https://www.readbyqxmd.com/read/29345293/s100b-expression-in-breast-cancer-as-a-predictive-marker-for-cancer-metastasis
#4
Meng-Chi Yen, Yung-Chi Huang, Jung-Yu Kan, Po-Lin Kuo, Ming-Feng Hou, Ya-Ling Hsu
In the tumor microenvironment, soluble molecules play important role in the establishment of a pre-metastatic niche. The S100 calcium-binding protein family are inflammatory molecules that contribute to the development of a pro-inflammatory tumor microenvironment. S100B belongs to the S100 family and serum S100B (also known as S100beta) serves as a marker for metastasis in lung cancer, ovarian cancer and melanoma. However, the association between S100B and the metastasis of breast cancer is not yet well understood...
February 2018: International Journal of Oncology
https://www.readbyqxmd.com/read/29345201/clinical-validation-of-nuclear-factor-kappa-b-expression-in-invasive-breast-cancer
#5
Anil Kumar Agrawal, Ewa Pielka, Artur Lipinski, Michal Jelen, Wojciech Kielan, Siddarth Agrawal
Breast cancer is the most commonly diagnosed cancer in Polish women. The expression of transcription nuclear factor kappa B, a key inducer of inflammatory response promoting carcinogenesis and cancer progression in breast cancer, is not well-established. We assessed the nuclear factor kappa B expression in a total of 119 invasive breast carcinomas and 25 healthy control samples and correlated this expression pattern with several clinical and pathologic parameters including histologic type and grade, tumor size, lymph node status, estrogen receptor status, and progesterone receptor status...
January 2018: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/29345032/mirna-320a-inhibits-trophoblast-cell-invasion-by-targeting-estrogen-related-receptor-gamma
#6
Tian Gao, Mou Deng, Qian Wang
AIM: MicroRNAs (miRs) play an essential role in the modulation of trophoblast function. We explored miR-320a expression in the human placenta. In addition, we report the promising effect and target functional loop of miR-320a in trophoblasts. METHODS: MiR-320a expression was investigated in both pre-eclamptic and healthy placenta tissues by quantitative real time-polymerase chain reaction to determine how miR-320a affected invasion, proliferation and migration in trophoblasts...
January 18, 2018: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/29344275/genistein-promotes-proliferation-of-human-cervical-cancer-cells-through-estrogen-receptor-mediated-pi3k-akt-nf-%C3%AE%C2%BAb-pathway
#7
Hai-Hong Chen, Shu-Ping Chen, Qiu-Ling Zheng, Shao-Ping Nie, Wen-Juan Li, Xiao-Juan Hu, Ming-Yong Xie
Phytoestrogens are polyphenol compounds which have similar structure to 17β-estradiol (E2), a kind of main estrogen in women. Thus, phytoestrogens may affect the reproductive and endocrine systems, leading to the development of estrogen-related cancers. The effect of genistein (Gen), one of the most studied phytoestrogens, on human cervical cancer cells (HeLa) was investigated in this study. It was found that Gen at concentrations of 0.001, 0.01, 0.1 and 1 µmol·L-1 promoted the proliferation of HeLa cells in a dose-dependent manner...
2018: Journal of Cancer
https://www.readbyqxmd.com/read/29343814/intrinsic-apoptotic-pathway-activation-increases-response-to-anti-estrogens-in-luminal-breast-cancers
#8
Michelle M Williams, Linus Lee, Thomas Werfel, Meghan M Morrison Joly, Donna J Hicks, Bushra Rahman, David Elion, Courtney McKernan, Violeta Sanchez, Monica V Estrada, Suleiman Massarweh, Richard Elledge, Craig Duvall, Rebecca S Cook
Estrogen receptor-α positive (ERα+) breast cancer accounts for approximately 70-80% of the nearly 25,0000 new cases of breast cancer diagnosed in the US each year. Endocrine-targeted therapies (those that block ERα activity) serve as the first line of treatment in most cases. Despite the proven benefit of endocrine therapies, however, ERα+ breast tumors can develop resistance to endocrine therapy, causing disease progression or relapse, particularly in the metastatic setting. Anti-apoptotic Bcl-2 family proteins enhance breast tumor cell survival, often promoting resistance to targeted therapies, including endocrine therapies...
January 17, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29343615/growth-of-human-breast-cancers-in-peromyscus
#9
Vimala Kaza, Elena Farmaki, Amanda Havighorst, Janet Crossland, Ioulia Chatzistamou, Hippokratis Kiaris
Modeling breast cancer in general and hormone-sensitive breast cancer, in particular in mice, has several limitations. These are related to the inbred nature of laboratory mice, and do not allow adequate appreciation of the contribution of the host's genetic heterogeneity in tumor growth. In addition, the naturally low estrogen levels of mice makes estradiol supplementation obligatory for tumor growth. Here, we show that Peromyscus californicus, following cyclosporine-mediated immunosuppression, supports the growth of both MDA-MB-231 estrogen-independent and MCF7 estrogen receptor-positive breast cancers without exogenous estradiol supplementation...
January 17, 2018: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/29342924/estrogen-and-thyroid-hormone-receptor-activation-by-medicinal-plants-from-bahia-brazil
#10
Luã Tainã Costa Reis, Magnus Régios Dias da Silva, Silvia Lima Costa, Eudes da Silva Velozo, Ronan Batista, Suzana Telles da Cunha Lima
Background: A number of medicinal plants are traditionally used for metabolic disorders in Bahia state, Brazil. The aim of this study was to evaluate the estrogen receptor (ER) and thyroid receptor (TR) activation of crude extracts prepared from 20 plants. Methods: Species were extracted and assayed for receptor activation through both ER and TR gene-reporter assays, using 17β-estradiol and triiodothyronine (T3), respectively, as the positive controls. Results: Cajanus cajan (Fabaceae), Abarema cochliacarpus (Fabaceae), and Borreria verticillata (Rubiaceae) were able to activate ER as much as the positive control (17β-estradiol)...
January 15, 2018: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/29341930/activation-of-estrogen-receptor-beta-er%C3%AE-regulates-the-expression-of-n-cadherin-e-cadherin-and-%C3%AE-catenin-in-androgen-independent-prostate-cancer-cells
#11
Rafael de Souza Silva, Ana Paola G Lombardi, Deborah Simão de Souza, Carolina M Vicente, Catarina S Porto
The aim of the present study was to investigate the impact of the activation of estrogen receptors on expression and localization of N-cadherin, E-cadherin and non-phosphorylated β-catenin in androgen-independent prostate cancer cells (PC-3 and DU-145) and in human post pubertal prostate epithelial cells (PNT1A). Expression of N-cadherin was detected in PNT1A and PC-3 cells, but not in DU-145 cells. E-cadherin was detected only in DU-145 cells and β-catenin was detected in all cells studied. N-cadherin and β-catenin were located preferentially in the cellular membrane of PNT1A cells and in the cytoplasm of PC-3 cells...
January 13, 2018: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/29339359/genetic-variants-in-immune-related-pathways-and-breast-cancer-risk-in-african-american-women-in-the-amber-consortium
#12
Chi-Chen Hong, Lara E Sucheston-Campbell, Song Liu, Qiang Hu, Song Yao, Kathryn L Lunetta, Stephen A Haddad, Edward A Ruiz-Narváez, Jeannette T Bensen, Ting-Yuan David Cheng, Elisa V Bandera, Lynn A Rosenberg, Christopher A Haiman, Kelvin P Lee, Sharon S Evans, Scott I Abrams, Elizabeth A Repasky, Andrew F Olshan, Julie R Palmer, Christine B Ambrosone
BACKGROUND: Constitutional immunity shaped by exposure to endemic infectious diseases and parasitic worms in Sub-Saharan Africa may play a role in the etiology of breast cancer among African American (AA) women. METHODS: A total of 13,235 gene variants in 433 genes across 45 immune pathways were analyzed in the AMBER consortium among 3,663 breast cancer cases and 4,687 controls. Gene-based pathway analyses were conducted using the adaptive rank truncated product statistic for overall breast cancer risk, and risk by estrogen receptor (ER) status...
January 16, 2018: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/29339259/perturbations-of-the-gut-microbiome-genes-in-infants-with-atopic-dermatitis-according-to-feeding-type
#13
Min-Jung Lee, Mi-Jin Kang, So-Yeon Lee, Eun Lee, Kangjin Kim, Sungho Won, Dong In Suh, Kyung Won Kim, Youn Ho Sheen, Kangmo Ahn, Bong-Soo Kim, Soo-Jong Hong
BACKGROUND: Perturbations of the infant gut microbiota can shape the development of the immune system and link to the risk of allergic diseases. OBJECTIVE: To understand the role of the gut microbiome in atopic dermatitis, the metagenome of the infant gut microbiome was analyzed according to feeding types. METHODS: The composition of gut microbiota was analyzed in fecal samples from 129 infants (6-month-old) by pyrosequencing, including 66 healthy infants and 63 infants with atopic dermatitis...
January 12, 2018: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29338386/estrogen-estrogen-receptor-%C3%AE-signaling-facilitates-bilirubin-metabolism-in-regenerating-liver-through-regulating-cytochrome-p450-2a6-expression
#14
Ta-Lun Kao, Yao-Li Chen, Yu-Ping Kuan, Wei-Chun Chang, Yu-Chen Ho, Shuyuan Yeh, Long-Bin Jeng, Wen-Lung Ma
BACKGROUND: After living donor liver transplantation (LDLT), rising serum bilirubin levels commonly indicate insufficient numbers of hepatocytes are available to metabolize bilirubin into biliverdin. Recovery of bilirubin levels is an important marker of hepatocyte repopulation after LDLT. Cytochrome P450 (CYP) 2A6 in humans (or cyp2a4 in rodents) can function as "bilirubin oxidase." Functional hepatocytes contain abundant CYP2A6, which is considered a marker for hepatocyte function recovery...
November 2017: Cell Transplantation
https://www.readbyqxmd.com/read/29337187/metabolomics-reveals-that-dietary-xenoestrogens-alter-cellular-metabolism-induced-by-palbociclib-letrozole-combination-cancer-therapy
#15
Benedikt Warth, Philipp Raffeiner, Ana Granados, Tao Huan, Mingliang Fang, Erica M Forsberg, H Paul Benton, Laura Goetz, Caroline H Johnson, Gary Siuzdak
Recently, the palbociclib/letrozole combination therapy was granted accelerated US FDA approval for the treatment of estrogen receptor (ER)-positive breast cancer. Since the underlying metabolic effects of these drugs are yet unknown, we investigated their synergism at the metabolome level in MCF-7 cells. As xenoestrogens interact with the ER, we additionally aimed at deciphering the impact of the phytoestrogen genistein and the estrogenic mycotoxin zearalenone. A global metabolomics approach was applied to unravel metabolite and pathway modifications...
January 10, 2018: Cell Chemical Biology
https://www.readbyqxmd.com/read/29335066/up-and-down-regulated-leukemia-related-protein-16-affects-er%C3%AE-expression-and-prolactin-secretion-by-gh3-cells
#16
Xing Su, Zhi Qiang Wu, Xiao Jiang Yang, An Ping Wang, Kun Zhao, Tao Guang Wu, Yi Sun, Jie Sun, Zheng Yao Chang, Xiao Yong Guo, Qing Hua Guo, Yi Ming Mu
Prolactinoma is an estrogen-related tumor and leukemia-related protein 16 (LRP16) is correlated with the progression of estrogen-related tumors, but the regulatory mechanism between LRP16 and prolactinoma remain unclear. This study demonstrates a variation in LRP16 with estrogen receptor α (ERα) in prolactinoma models and the up and downregulation effects of LRP16 on prolactin secretion of pituitary adenomas cells (GH3 cells). In our study, 50 male SD rats (30-day-old) were randomly divided into five groups of 10 rats each...
December 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/29330934/melatonin-inhibits-the-proliferation-of-breast-cancer-cells-induced-by-bisphenol-a-via-targeting-estrogen-receptor-related-pathways
#17
Tianjiao Wang, Bowen Liu, Yanan Guan, Miaomiao Gong, Weiying Zhang, Jinjin Pan, Yanan Liu, Rui Liang, Yuhui Yuan, Lihong Ye
BACKGROUND: Background: Bisphenol A (BPA) is an estrogen-like chemical widely contained in daily supplies. There is evidence that environmental exposure to BPA could contribute to the development of hormone-related cancers. As is reported in numerous studies, melatonin, an endogenous hormone secreted by the pineal gland, could markedly inhibit estrogen-induced proliferation of breast cancer (BC) cells. In this study, we intended to reveal the effects of melatonin on BPA-induced proliferation of estrogen receptor-positive BC cells...
January 13, 2018: Thoracic Cancer
https://www.readbyqxmd.com/read/29329006/ongoing-unmet-needs-in-treating-estrogen-receptor-positive-her2-negative-metastatic-breast-cancer
#18
REVIEW
Gül A Başaran, Chris Twelves, Véronique Diéras, Javier Cortés, Ahmad Awada
Estrogen receptor-positive (ER+)/human epidermal growth factor receptor 2 negative (HER2-) advanced or metastatic breast cancer (MBC) is the most common MBC subtype and currently remains incurable, with a median overall survival of 24.8 months (95% confidence interval, 21.3-30.3). Common sites of metastases are bone, viscera, and brain, causing significant symptoms that negatively affect patient functioning, quality of life (QoL), and work productivity. Guidelines state that endocrine therapy (ET) is preferable to chemotherapy as first-line treatment for patients with ER+ MBC, regardless of limited visceral metastases, unless rapid tumor response is required or ET resistance is suspected...
December 6, 2017: Cancer Treatment Reviews
https://www.readbyqxmd.com/read/29328407/estrogen-receptor-%C3%AE-1-activation-accelerates-resistance-to-epidermal-growth-factor-receptor-tyrosine-kinase-inhibitors-in-non-small-cell-lung-cancer
#19
Shengling Fu, Changyu Liu, Quanfu Huang, Sheng Fan, Hexiao Tang, Xiangning Fu, Bo Ai, Yongde Liao, Qian Chu
Non-small cell lung cancer (NSCLC) is one of the leading causes of cancer-related deaths worldwide. Epidermal growth factor receptor-tyrosine kinase inhibitors (EGFR‑TKIs) have revolutionized the treatment of patients with advanced EGFR-mutant NSCLC. However, drug resistance eventually develops in the majority of patients despite an excellent initial response. The present study aimed to investigate the mechanism of acquired resistance to EGFR-TKIs and to explore strategies to overcome the resistance to EGFR-TKIs from a gender perspective...
January 4, 2018: Oncology Reports
https://www.readbyqxmd.com/read/29326301/prognostic-roles-of-signal-transducers-activators-of-transcription-family-in-human-breast-cancer
#20
Shuntao Wang, Lili Yu, Wei Shi, Xueqin Li, Lixiu Yu
Signal transducer and activator of transcription (STAT) family are critical transcription factors, which have been proved as prognostic predictors for a number of cancers. However, the prognostic roles of STAT family in breast cancer patients remain in dispute. In this study, we mined the 'Kaplan-Meier plotter' (KM plotter) online database to explore the prognostic roles of STAT family mRNA expression in breast cancer including overall survival (OS), progression-free survival (PFS), as well as post-progression survival (PPS)...
January 11, 2018: Bioscience Reports
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