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Tamoxifen aromatase

Ute Berndt, Bernd Leplow, Robby Schoenfeld, Tilmann Lantzsch, Regina Grosse, Christoph Thomssen
INTRODUCTION: It is generally accepted that estrogens play a protective role in cognitive function. Therefore, it can be expected that subtotal estrogen deprivation following aromatase inhibition will alter cognitive performance. METHODS: In a cross-sectional study we investigated 80 postmenopausal women with breast cancer. Memory and spatial cognition were compared across 4 treatment groups: tamoxifen only (TAM, n = 22), aromatase inhibitor only (AI, n = 22), TAM followed by AI ('SWITCH group', n = 15), and patients with local therapy (LT) only (surgery and radiation, n = 21)...
August 2016: Breast Care
Gretchen L Gierach, Rochelle E Curtis, Ruth M Pfeiffer, Maeve Mullooly, Estelle A Ntowe, Robert N Hoover, Sarah J Nyante, Heather Spencer Feigelson, Andrew G Glass, Amy Berrington de Gonzalez
Importance: Within 10 years after breast cancer diagnosis, roughly 5% of patients develop contralateral breast cancer (CBC). Randomized trials have found that therapy including tamoxifen citrate and aromatase inhibitors (AIs) reduces CBC risk. But little is known about the magnitude and duration of protective associations within the context of real-world clinical management settings, where varying durations of and gaps in treatment are common. Objective: To determine the association between adjuvant tamoxifen and AI therapy and CBC risk within a general community setting...
October 6, 2016: JAMA Oncology
Cláudia de Brito, Margareth Crisóstomo Portela, Mauricio Teixeira Leite de Vasconcellos
Objectives To better understand the role that health care plays in breast cancer survival by investigating the effects that hormone therapy adherence and other select health care variables, adjusted for clinical and sociodemographic factors, had among a population of women in Rio de Janeiro, Brazil. Methods This was a longitudinal study based on secondary data of 5 861 women treated with hormone therapy (tamoxifen or aromatase inhibitors) at the National Cancer Institute of Brazil (INCA), from 1 January 2004 - 29 October 2010...
June 2016: Revista Panamericana de Salud Pública, Pan American Journal of Public Health
Edoardo Colzani, Mark Clements, Anna L V Johansson, Annelie Liljegren, Wei He, Judith Brand, Jan Adolfsson, Tommy Fornander, Per Hall, Kamila Czene
BACKGROUND: Bone fractures may have an impact on prognosis of breast cancer. The long-term risks of bone fracture in breast cancer patients have not been thoroughly studied. METHODS: Poisson regression was used to investigate the incidence of hospitalisation due to bone fracture comparing women with and without breast cancer based on Swedish National registers. Cox regression was used to investigate the risk of being hospitalised with bone fracture, and subsequent risk of death, in a regional cohort of breast cancer patients...
October 4, 2016: British Journal of Cancer
Husam Abdel-Qadir, Eitan Amir, Hadas D Fischer, Longdi Fu, Peter C Austin, Paula J Harvey, Paula A Rochon, Douglas S Lee, Geoffrey M Anderson
BACKGROUND: Aromatase inhibitors (AIs) may increase cardiovascular risk relative to tamoxifen in post-menopausal women with breast cancer. This risk has not been well-quantified outside of clinical trials. METHODS: Observational population-based cohort study of women aged >55 years diagnosed with stage I-III breast cancer between 2005 and 2010. Women treated with AIs or tamoxifen were followed to March 2012. The primary outcome was hospitalisation for myocardial infarction (MI)...
September 29, 2016: European Journal of Cancer
Suzanne N Landi, Kemi M Doll, Jeannette T Bensen, Laura Hendrix, Carey K Anders, Jennifer M Wu, Hazel B Nichols
PURPOSE: Endocrine therapy for breast cancer can exacerbate menopausal symptoms. The association between endocrine therapy and common pelvic floor disorders including urinary incontinence has rarely been evaluated. We examined urogenital and sexual side effects among women with a breast cancer diagnosis, comparing endocrine therapy users to nonusers. METHODS: Urogenital and sexual symptoms were self-reported during the enrollment interview within the University of North Carolina Cancer Survivorship Cohort...
September 28, 2016: Cancer Causes & Control: CCC
Miho Kono, Takeo Fujii, Genevieve Ray Lyons, Lei Huo, Roland Bassett, Yun Gong, Meghan Sri Karuturi, Debu Tripathy, Naoto T Ueno
PURPOSE: The purpose of this study is to evaluate survival outcome in patients with hormone receptor (HR)-positive (+) metastatic breast cancer (MBC) who received fluoxymesterone after disease progression while receiving contemporary hormonal therapy, as well as the association between estrogen receptor (ER)/androgen receptor (AR) status and survival outcome in these patients. METHODS: We retrospectively identified 103 patients treated with fluoxymesterone for HR + MBC from 2000 to 2014 and with at least one previous hormonal therapy in a metastatic setting...
November 2016: Breast Cancer Research and Treatment
Qiufan Zheng, Wen Xia, Qianyi Lu, Ruoxi Hong, Ge Qin, Fei Xu, Tao Qin, Yanxia Shi, Zhongyu Yuan, Shusen Wang
PURPOSE: Endocrine therapy is associated with improved disease-free survival (DFS) in hormone receptor-positive breast cancer, but it is also associated with many adverse events. The aim of this study was to clarify the association between endocrine treatment-related symptoms and treatment efficacy in patients receiving adjuvant endocrine therapy. METHOD: EMBASE, Web of Science, PubMed, and CENTRAL databases were searched for studies that compared treatment efficacy between patients in whom adverse events did and did not occur during hormone therapy...
November 2016: Breast Cancer Research and Treatment
Connor G O'Leary, Haley Ellis, Michaela Higgins
PURPOSE OF REVIEW: The risk of relapse associated with oestrogen receptor-positive early breast cancer persists for at least 15 years after diagnosis. Several large clinical trials have examined extended adjuvant endocrine therapy. RECENT FINDINGS: The MA.17 trial demonstrated improved disease-free survival (DFS) with use of letrozole for 5 years after some years of tamoxifen and an overall survival advantage for this approach in women with node-positive oestrogen receptor-positive cancer at diagnosis...
November 2016: Current Opinion in Oncology
Pauline Bosco-Lévy, Jeremy Jové, Philip Robinson, Nicholas Moore, Annie Fourrier-Réglat, Julien Bezin
BACKGROUND: Non-persistence to oral hormonal therapy (HT) in breast cancer (BC) is an emerging health issue, and estimations vary according to the population selected and/or the statistical method applied. This study aimed to estimate non-persistence over 5 years to HT in an unselected sample of women with BC using a French national population-based database and accounting for competing risks. METHODS: A retrospective cohort of 600 women initiating a HT between 2006 and 2007 was constituted using a representative sample of the French national healthcare insurance system database...
October 11, 2016: British Journal of Cancer
C Yavas, G Yavas, H Toy, O Ata
Postmenopausal patients with breast cancer have two options for adjuvant endocrine therapy, tamoxifen and aromatase inhibitors (AIs) as well as radiotherapy (RT) and chemotherapy. However, there is limited data regarding the optimal sequencing of RT and tamoxifen/AIs. Thus, we aimed to evaluate the effects of tamoxifen and AIs on radiation-induced cardiotoxicity. Eighty ovariectomized rats were divided into eight groups (G). G1 was defined as a control group; G2, G3, G4, and G5 were RT, tamoxifen, anastrozle, and letrozole groups, respectively; G6, G7, and G8 were RT plus tamoxifen, anastrozle, and letrozole groups, respectively...
September 5, 2016: Human & Experimental Toxicology
Paige E Tucker, Christobel Saunders, Max K Bulsara, Jason Jit-Sun Tan, Stuart G Salfinger, Helena Green, Paul A Cohen
OBJECTIVES: To investigate the prevalence of sexual dysfunction in women with a history of breast cancer following risk-reducing salpingo-oophorectomy (RRSO). A secondary objective was to examine the effect of a prior diagnosis of breast cancer, and other factors, on sexuality and quality of life (QoL) outcomes. STUDY DESIGN: Cross-sectional study of 119 women who underwent RRSO between 2009 and 2014. MAIN OUTCOME MEASURES: Data were collected via a questionnaire comprising demographic information and validated measures of sexual function, sexual distress, relationship satisfaction, body image, psychological stress, menopause symptoms and general quality of life...
September 1, 2016: Breast: Official Journal of the European Society of Mastology
Jennifer Foglietta, Alessandro Inno, Francesca de Iuliis, Valentina Sini, Simona Duranti, Monica Turazza, Luigi Tarantini, Stefania Gori
Aromatase inhibitors represent an effective endocrine treatment for patients with hormone receptor-positive breast cancer, in early stage and in metastatic disease. However, by decreasing levels of serum estrogens they also potentially reduce the protective effect of estrogens on the cardiovascular system. Patients treated with aromatase inhibitors, in fact, compared with those who receive tamoxifen, more often develop hyperlipidemia, hypercholesterolemia, and hypertension, which are recognized risk factors for cardiovascular disease...
July 25, 2016: Clinical Breast Cancer
Milena Rondón-Lagos, Victoria E Villegas, Nelson Rangel, Magda Carolina Sánchez, Peter G Zaphiropoulos
17β-Estradiol (E2) plays a pivotal role in the development and progression of breast cancer. As a result, blockade of the E2 signal through either tamoxifen (TAM) or aromatase inhibitors is an important therapeutic strategy to treat or prevent estrogen receptor (ER) positive breast cancer. However, resistance to TAM is the major obstacle in endocrine therapy. This resistance occurs either de novo or is acquired after an initial beneficial response. The underlying mechanisms for TAM resistance are probably multifactorial and remain largely unknown...
2016: International Journal of Molecular Sciences
Jennifer L Milata, Julie L Otte, Janet S Carpenter
BACKGROUND: Oral endocrine therapy (OET) such as tamoxifen or aromatase inhibitors reduces recurrence and mortality for the 75% of breast cancer survivors (BCSs) with a diagnosis of estrogen receptor-positive breast cancer. Because many BCSs decide not take OET as recommended because of adverse effects, understanding BCSs' decisional supports and needs is foundational to supporting quality OET decision making about whether to adhere to OET. OBJECTIVE: The aim of this study was to examine literature pertaining to OET nonadherence and adverse effects using the Ottawa Decision Support Framework categories of decisional supports and decisional needs because these factors potentially influence OET use...
August 18, 2016: Cancer Nursing
Rodríguez-Sanz María, Pineda-Moncusí Marta, Servitja Sonia, Garcia-Giralt Natalia, Martos Tamara, Tusquets Ignasi, Martínez-García Maria, Rodriguez-Morera Jaime, Diez-Perez Adolfo, Albanell Joan, Nogués Xavier
INTRODUCTION: Patients with breast cancer under aromatase inhibitor (AI) treatment often develop osteoporosis and their average bone loss rate is twice that of natural reduction during menopause, increasing fracture risk. As the current diagnostic technique based on bone mineral density (BMD) provides no information on bone quality, the Trabecular Bone Score (TBS) has been proposed to reflect bone microarchitecture status. The present study was designed to assess prospective changes in TBS and lumbar spine (LS) BMD in postmenopausal women with breast cancer at completion of AI treatment...
November 2016: Bone
Antonis Valachis, Hans Garmo, John Weinman, Irma Fredriksson, Johan Ahlgren, Malin Sund, Lars Holmberg
The purpose of the study was to investigate whether the concomitant use of selective serotonin reuptake inhibitors (SSRI) with tamoxifen influences the risk of death due to breast cancer, and we also investigated the association between SSRI use and adherence to oral endocrine therapy (ET). We analyzed data from BCBaSe Sweden, which is a database created by the data linkage of Registries from three different regions of Sweden. To investigate the association between ET adherence and SSRI use, we included all women who were diagnosed with non-distant metastatic ER-positive invasive breast cancer from July 2007 to July 2011 and had at least one dispensed prescription of oral tamoxifen or aromatase inhibitor...
September 2016: Breast Cancer Research and Treatment
Ameet K Mishra, Annelie Abrahamsson, Charlotta Dabrosin
The estrogen receptor-alpha (ERα) is used as a predictive marker for anti-estrogen therapy in breast cancer patients. In addition to aromatase inhibitors, ERα can be targeted at the receptor level using the receptor modulator tamoxifen or by the pure anti-estrogen fulvestrant. The role of the second ER, ER-beta (ERβ), as a therapeutic target or prognostic marker in breast cancer is still elusive. Hitherto, it is not known if ERα+/ERβ+ breast cancers would benefit from a treatment strategy combining tamoxifen and fulvestrant or if fulvestrant exert any therapeutic effects in ERα-/ERβ+ breast cancer...
July 28, 2016: Oncotarget
Risa B Burns, Mara A Schonberg, Nadine M Tung, Howard Libman
In November 2013, the U.S. Preventive Services Task Force issued a guideline on medications for risk reduction of primary breast cancer in women. Although mammography can detect early cases, it cannot prevent development of breast cancer. Tamoxifen and raloxifene are selective estrogen receptor modulators that have been shown to reduce the risk for estrogen receptor-positive breast cancer and are approved by the U.S. Food and Drug Administration (FDA) for this indication. However, neither medication reduces the risk for estrogen receptor-negative breast cancer or all-cause mortality...
August 2, 2016: Annals of Internal Medicine
Asona Lui, Jacob New, Joshua Ogony, Sufi Thomas, Joan Lewis-Wambi
BACKGROUND: mTOR inhibition of aromatase inhibitor (AI)-resistant breast cancer is currently under evaluation in the clinic. Everolimus/RAD001 (Afinitor®) has had limited efficacy as a solo agent but is projected to become part of combination therapy for AI-resistant breast cancer. This study was conducted to investigate the anti-proliferative and resistance mechanisms of everolimus in AI-resistant breast cancer cells. METHODS: In this study we utilized two AI-resistant breast cancer cell lines, MCF-7:5C and MCF-7:2A, which were clonally derived from estrogen receptor positive (ER+) MCF-7 breast cancer cells following long-term estrogen deprivation...
2016: BMC Cancer
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