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https://www.readbyqxmd.com/read/28736226/rapid-effects-of-the-aromatase-inhibitor-fadrozole-on-steroid-production-and-gene-expression-in-the-ovary-of-female-fathead-minnows-pimephales-promelas
#1
Anthony L Schroeder, Gerald T Ankley, Tanwir Habib, Natalia Garcia-Reyero, Barbara L Escalon, Kathleen M Jensen, Michael D Kahl, Elizabeth J Durhan, Elizabeth A Makynen, Jenna E Cavallin, Dalma Martinovic-Weigelt, Edward J Perkins, Daniel L Villeneuve
Cytochrome P450 aromatase catalyzes conversion of C19 androgens to C18 estrogens and is critical for normal reproduction in female vertebrates. Fadrozole is a model aromatase inhibitor that has been shown to suppress estrogen production in the ovaries of fish. However, little is known about the early impacts of aromatase inhibition on steroid production and gene expression in fish. Adult female fathead minnows (Pimephales promelas) were exposed via water to 0, 5, or 50 µg fadrozole/L for a time-course of 0...
July 20, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28730338/jagged1-promotes-aromatase-inhibitor-resistance-by-modulating-tumor-associated-macrophage-differentiation-in-breast-cancer-patients
#2
Hang Liu, Jingxuan Wang, Minghui Zhang, Qijia Xuan, Zhipeng Wang, Xin Lian, Qingyuan Zhang
PURPOSE: Endocrine resistance limits the efficacy of anti-estrogen therapies. Notch signaling is involved in modulating tumor-associated macrophage (TAM) differentiation and is upregulated in endocrine-resistant breast cancer cells. Here, we analyzed the role of Jagged1 in the regulation of TAM polarization to investigate whether the Jagged1-Notch pathway promotes the acquisition of aromatase inhibitor (AI) resistance by upregulating TAM infiltration. METHODS: The Jagged1 expression levels and M2 TAM infiltration density, in 203 tumor samples from ER-positive postmenopausal patients, who received AI treatment, were evaluated by immunohistochemical staining and the results were compared with clincopathological parameters and survival...
July 20, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28727878/concerns-about-methodology-of-a-trial-investigating-vaginal-health-during-aromatase-inhibitor-therapy-for-breast-cancer
#3
Per Eystein Lønning
No abstract text is available yet for this article.
July 20, 2017: JAMA Oncology
https://www.readbyqxmd.com/read/28727874/concerns-about-methodology-of-a-trial-investigating-vaginal-health-during-aromatase-inhibitor-therapy-for-breast-cancer-reply
#4
Michelle E Melisko, Jimmy Hwang, Hope S Rugo
No abstract text is available yet for this article.
July 20, 2017: JAMA Oncology
https://www.readbyqxmd.com/read/28727870/concerns-about-methodology-of-a-trial-investigating-vaginal-health-during-aromatase-inhibitor-therapy-for-breast-cancer
#5
V Craig Jordan
No abstract text is available yet for this article.
July 20, 2017: JAMA Oncology
https://www.readbyqxmd.com/read/28727864/concerns-about-methodology-of-a-trial-investigating-vaginal-health-during-aromatase-inhibitor-therapy-for-breast-cancer
#6
Wenhua Tang, Yu Zhang
No abstract text is available yet for this article.
July 20, 2017: JAMA Oncology
https://www.readbyqxmd.com/read/28727815/polymorphisms-associated-with-everolimus-pharmacokinetics-toxicity-and-survival-in-metastatic-breast-cancer
#7
Tomas Pascual, María Apellániz-Ruiz, Cristina Pernaut, Cecilia Cueto-Felgueroso, Pablo Villalba, Carlos Álvarez, Luis Manso, Lucia Inglada-Pérez, Mercedes Robledo, Cristina Rodríguez-Antona, Eva Ciruelos
PURPOSE: Metastatic breast cancer (MBC) progressing after endocrine therapy frequently activates PI3K/AKT/mTOR pathway. The BOLERO-2 trial showed that everolimus-exemestane achieves increased progression free survival (PFS) compared with exemestane. However, there is great inter-patient variability in toxicity and response to exemestane-everolimus treatment. The objective of this study was to perform an exploratory study analyzing the implication of single nucleotide polymorphisms (SNPs) on outcomes from this treatment through a pharmacogenetic analysis...
2017: PloS One
https://www.readbyqxmd.com/read/28725276/early-stage-breast-cancer-treatment-and-prognostic-factors-post-san-antonio-breast-cancer-symposium-2016
#8
REVIEW
Christoph Suppan, Marija Balic
Developments in early breast cancer presented at the 2016 San Antonio Breast Cancer Symposium included important studies on extending adjuvant endocrine therapy with aromatase inhibitors, the role of bisphosphonates, and evidence for molecular prognostic factors and circulating tumor cells in early stage breast cancer patients.
2017: Memo
https://www.readbyqxmd.com/read/28719836/long-term-management-of-patients-with-hormone-receptor-positive-metastatic-breast-cancer-concepts-for-sequential-and-combination-endocrine-based-therapies
#9
REVIEW
Adam M Brufsky
Treatment options for hormone receptor-positive (HR-positive) metastatic breast cancer (MBC) continue to increase in parallel with expanding knowledge about the complex biology of breast cancer subtypes and resistance mechanisms to endocrine therapy. For patients with HR-positive MBC, there are now an unprecedented number of endocrine-based treatment options that can improve long-term outcomes, while preserving or optimizing quality of life, and that can be used before selecting more cytotoxic chemotherapeutic regimens...
July 6, 2017: Cancer Treatment Reviews
https://www.readbyqxmd.com/read/28717399/fulvestrant-in-advanced-breast-cancer-evidence-to-date-and-place-in-therapy
#10
REVIEW
Katalin Boér
Breast cancer is a classical hormone-dependent tumour; therefore, endocrine therapy is the mainstay of treatment for hormone receptor-positive, human epidermal growth factor 2-negative advanced breast cancer. Until recently, classical endocrine agents such as tamoxifen, steroidal and nonsteroidal aromatase inhibitors and fulvestrant have been widely used in postmenopausal patients to treat locally advanced or metastatic disease. However, for patients with this subtype of breast cancer, the landscape of endocrine therapy is rapidly changing...
July 2017: Therapeutic Advances in Medical Oncology
https://www.readbyqxmd.com/read/28717268/empiric-medical-therapy-with-hormonal-agents-for-idiopathic-male-infertility
#11
REVIEW
Nicholas N Tadros, Edmund S Sabanegh
INTRODUCTION: Infertility affects approximately 15% of all couples, and male factor contribute to up to 50% of cases. Unfortunately, the cause of male infertility is unknown in about 30% of these cases. Infertility of unknown origin is classified as idiopathic male infertility when abnormal semen parameters are present. Despite not having a definable cause, these men may respond to treatment. This review focuses on the use of empiric hormonal therapies for idiopathic male infertility...
July 2017: Indian Journal of Urology: IJU: Journal of the Urological Society of India
https://www.readbyqxmd.com/read/28708530/bambi-promotes-porcine-granulosa-cell-steroidogenesis-involving-tgf-%C3%AE-signaling
#12
Long Bai, Guiyan Chu, Wusu Wang, Aoqi Xiang, Gongshe Yang
Transforming growth factor β (TGF-β), acting as the auto/para endocrine factors, has multi-function in mammalian follicle development. Bone morphogenetic protein and activin membrane-bound inhibitor (BAMBI) is considered as a pseudoreceptor in the TGF-β signal pathway which has the similar extracellular structure of TGF-β receptor but lack of intracellular serine/threonine kinase domains. However, the biological function of BAMBI involved in porcine granulosa cell steroidogenesis remains unknown. This study was thus carried out to explore the effect of BAMBI on the steroidogenesis process in porcine primary granulosa cells...
May 28, 2017: Theriogenology
https://www.readbyqxmd.com/read/28705409/clinical-benefit-and-risk-of-death-with-endocrine-therapy-in-ovarian-cancer-a-comprehensive-review-and-meta-analysis
#13
Laura Paleari, Sara Gandini, Nicoletta Provinciali, Matteo Puntoni, Nicoletta Colombo, Andrea DeCensi
BACKGROUND: Steroid hormones promote epithelial ovarian cancer (EOC) growth and their receptor expression is associated with disease outcome. Hormone therapy is frequently used in pretreated EOC, but the magnitude of activity overall and by specific agents or tumor characteristics is unknown. METHODS: Clinical Benefit Rates (CBR) and deaths from clinical trials of endocrine agents were meta-analyzed. Summary estimates of CBR (SCBR) and Odd Ratio for death (SOR) were calculated according with type of drug, ER and PgR status, platinum resistance, line of therapy, tumor grade and tamoxifen dose...
July 10, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/28700959/relationship-between-physical-activity-practice-and-metabolic-profile-of-postmenopausal-women-under-treatment-with-aromatase-inhibitors-for-breast-cancer
#14
Thais R S de Paulo, Juliana Viezel, Bruna L Aro, Sylvia C Seidinger, Ana Carolina A C Trindade, Diego G D Christofaro, Ismael F Freitas
OBJECTIVE: To analyze the relationship between physical activity practice and metabolic profile of postmenopausal women under treatment with aromatase inhibitors (AIs) for the treatment of breast cancer. STUDY DESIGN: Cross-sectional study, conducted with 101 postmenopausal women (aged 50-80 years). The sample was divided into two groups; group without cancer (GW; n=65) and breast cancer group treated with AIs (GC; n=36). Physical activity (PA) was evaluated by questionnaire...
July 5, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28700478/impact-of-nonsteroidal-aromatase-inhibitors-on-steroid-profile-in-a-chinese-population
#15
Yanyi Xing, Xin Liu, Mengmeng Yan, Tianqi Chen, Fei Lu, Bing Xu, Yan Gong, Fuhao Chu, Haimin Lei
Steroid profiling was introduced to determine the endogenous steroid misuse in sports. Thus, screening for the exogenous use of these prohibited substances can be established by monitoring a range of endogenous steroids, which constitute the steroid profile and evaluate their concentrations and ratios against reference values. The steroid profiling is currently based on population statistics. As large interindividual variations exist, athlete biological passport (ABP) analysis is ongoing. This study aimed to identify new biomarker(s) for aromatase inhibitor detection in sports using statistical analysis and adapt the model into ABP analysis...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28698390/randomized-controlled-trial-of-a-home-based-walking-program-to-reduce-moderate-to-severe-aromatase-inhibitor-associated-arthralgia-in-breast-cancer-survivors
#16
Kirsten A Nyrop, Leigh F Callahan, Rebecca J Cleveland, Liubov L Arbeeva, Betsy S Hackney, Hyman B Muss
BACKGROUND: In postmenopausal women diagnosed with breast cancer (BC), most BC tumors are hormone receptor positive and guidelines recommend adjuvant endocrine therapy that includes an aromatase inhibitor (AI). This study investigates the impact of a 6-week, home-based, self-directed walking program on the commonly reported side effect of AI-associated arthralgia (AIAA). MATERIALS AND METHODS: In this phase II trial, consented BC patients were randomized to walking Intervention (n = 31) or Wait List Control (WLC; n = 31)...
July 11, 2017: Oncologist
https://www.readbyqxmd.com/read/28698282/circulating-sex-steroids-co-regulate-adipose-tissue-immune-cell-populations-in-healthy-men
#17
Katya B Rubinow, Jing Chao, Derek Hagman, Mario Kratz, Brian Van Yserloo, Nilesh W Gaikwad, John K Amory, Stephanie T Page
Male hypogonadism results in changes in body composition characterized by increases in fat mass. Resident immune cells influence energy metabolism in adipose tissue and could promote increased adiposity through paracrine effects. We hypothesized that manipulation of circulating sex steroid levels in healthy men would alter adipose tissue immune cell populations. Subjects (n=44 men, 19-55 years of age) received 4 weeks of treatment with the GnRH receptor antagonist acyline with daily administration of 1) placebo gel, 2) 1...
July 11, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28695563/bone-targeted-therapies-in-advanced-breast-cancer
#18
Ewelina Biskup, Fengfeng Cai, Marcus Vetter
Bone targeted therapies are of increasing importance, not only for bone health in the clinical course of breast cancer, but recently also in the adjuvant setting as preventative, anticancer and prognosis-improving agents. It is well established that women with advanced breast cancer receive bisphosphonates or denosumab to prevent therapy-related osteoporosis. As many as 70% of these patients suffer from bone metastases and receive bone targeted agents in order to prevent skeletal related events (SREs), which are debilitating or diminish the quality of life...
July 11, 2017: Swiss Medical Weekly
https://www.readbyqxmd.com/read/28695299/adjuvant-ovarian-suppression-for-resected-breast-cancer-2017-critical-assessment
#19
EDITORIAL
Steven E Vogl
Currently available data supporting adjuvant ovarian function suppression for resected breast cancer in premenopausal women in addition to standard chemotherapy and tamoxifen are not persuasive, even though an ASCO guideline supports them. Available information from the key trial, called "SOFT," has only 5-year follow-up in a 15-year disease. It employs breast cancer events as an endpoint, rather than distant metastases, or better still, death from any cause. The small advantages reported to date may disappear when aromatase inhibitors are given after the occurrence of menopause in the control population...
July 10, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28694055/estrogen-regulated-expression-of-cyp19a1a-and-cyp19a1b-genes-in-swim-up-fry-of-labeo-rohita
#20
Shreyasi Gupta, Sujata Roy Moulik, Puja Pal, Suravi Majumder, Sumana Das, Payel Guha, Subir Kumar Juin, Ashis Kumar Panigrahi, Dilip Mukherjee
P450 aromatase is the terminal enzyme in the steroidogenic pathway and catalyzes the conversion of androgens to estrogens. The expression of cyp19a1 genes in brain and gonad of Indian major carp, Labeo rohita swim-up fry was measured by quantitative real-time polymerase chain-reaction. Results demonstrated that cyp19a1b and cyp19a1a predominate in brain and gonad respectively. Treatment of fry with an aromatase inhibitor fadrozole for 6 days attenuated brain cyp19a1b expression, but not cyp19a1a of gonad. Fadrozole also attenuated brain aromatase activity...
July 7, 2017: General and Comparative Endocrinology
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