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https://www.readbyqxmd.com/read/27923036/cotargeting-of-cyp-19-aromatase-and-emerging-pivotal-signalling-pathways-in-metastatic-breast-cancer
#1
REVIEW
Stine Daldorff, Randi Margit Ruud Mathiesen, Olav Erich Yri, Hilde Presterud Ødegård, Jürgen Geisler
Aromatase inhibition is one of the cornerstones of modern endocrine therapy of oestrogen receptor-positive (ER+) metastatic breast cancer (MBC). The nonsteroidal aromatase inhibitors anastrozole and letrozole, as well as the steroidal aromatase inactivator exemestane, are the preferred drugs and established worldwide in all clinical phases of the disease. However, although many patients suffering from MBC experience an initial stabilisation of their metastatic burden, drug resistance and disease progression occur frequently, following in general only a few months on treatment...
December 6, 2016: British Journal of Cancer
https://www.readbyqxmd.com/read/27922047/new-arylated-benzo-h-quinolines-induce-anti-cancer-activity-by-oxidative-stress-mediated-dna-damage
#2
Dharmendra K Yadav, Reeta Rai, Naresh Kumar, Surjeet Singh, Sanjeev Misra, Praveen Sharma, Priyanka Shaw, Horacio Pérez-Sánchez, Ricardo L Mancera, Eun Ha Choi, Mi-Hyun Kim, Ramendra Pratap
The anti-cancer activity of the benzo[h]quinolines was evaluated on cultured human skin cancer (G361), lung cancer (H460), breast cancer (MCF7) and colon cancer (HCT116) cell lines. The inhibitory effect of these compounds on the cell growth was determined by the MTT assay. The compounds 3e, 3f, 3h and 3j showed potential cytotoxicity against these human cancer cell lines. Effect of active compounds on DNA oxidation and expression of apoptosis related gene was studied. We also developed a quantitative method to measure the activity of cyclin-dependent kinases-2 (CDK2) by western blotting in the presence of active compound...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27920344/smad3-4-binding-to-promoter-ii-of-p450arom-so-as-to-regulate-aromatase-expression-in-endometriosis
#3
Juan Qu, Yuanyuan Zhu, Xiadi Wu, Juan Zheng, Zhen Hou, Yugui Cui, Yundong Mao, Jiayin Liu
Activin A can stimulate aromatase P450 (P450arom) expression in eutopic endometrial stromal cells (ESCs) of endometriosis by activin type I receptor-Smad pathway. In order to identify Smad3/4 binding to P450arom promoter II that mediates activin A response in ESCs, polymerase chain reaction (PCR) products of a serial truncated deletion of the P450arom promoter II region between -904 and +87 bp were inserted into the pGL3-basic vector to generate the promoter reporter plasmids. Luciferase reporter plasmids were cotransfected into cells with or without activin A (25 ng/mL)...
December 5, 2016: Reproductive Sciences
https://www.readbyqxmd.com/read/27917746/insomnia-in-breast-cancer-independent-symptom-or-symptom-cluster
#4
Philip R Gehrman, Sheila N Garland, Lea Ann Matura, Jun Mao
OBJECTIVE: This study examined insomnia in the context of breast cancer, both as an independent symptom and as a component of a symptom cluster that includes depression, anxiety, fatigue, and pain. METHOD: Women with a history of breast cancer currently taking an aromatase inhibitor and who had completed cancer treatment at least one month prior to enrollment were included (n = 413). Participants completed validated measures of insomnia, fatigue, pain, depression, and anxiety...
December 5, 2016: Palliative & Supportive Care
https://www.readbyqxmd.com/read/27915435/bone-remodeling-and-regulating-biomarkers-in-women-at-the-time-of-breast-cancer-diagnosis
#5
Song Yao, Yali Zhang, Li Tang, Janise M Roh, Cecile A Laurent, Chi-Chen Hong, Theresa Hahn, Joan C Lo, Christine B Ambrosone, Lawrence H Kushi, Marilyn L Kwan
PURPOSE: The majority of breast cancer patients receive endocrine therapy, including aromatase inhibitors known to cause increased bone resorption. Bone-related biomarkers at the time of breast cancer diagnosis may predict future risk of osteoporosis and fracture after endocrine therapy. METHODS: In a large population of 2,401 female breast cancer patients who later underwent endocrine therapy, we measured two bone remodeling biomarkers, TRAP5b and BAP, and two bone regulating biomarkers, RANKL and OPG, in serum samples collected at the time of breast cancer diagnosis...
December 3, 2016: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/27914569/treatment-with-ruta-graveolens-5ch-and-rhus-toxicodendron-9ch-may-reduce-joint-pain-and-stiffness-linked-to-aromatase-inhibitors-in-women-with-early-breast-cancer-results-of-a-pilot-observational-study
#6
Jean-Claude Karp, Carole Sanchez, Philippe Guilbert, William Mina, Antoine Demonceaux, Hervé Curé
OBJECTIVE: To determine the possible effect of two homeopathic medicines, Ruta graveolens 5CH and Rhus toxicodendron 9CH, in the prevention of aromatase inhibitor (AI) associated joint pain and/or stiffness in women with early, hormone-receptor positive, breast cancer. METHODS: This prospective, unrandomized observational study was carried out between April and October 2014. Women were recruited in two groups, according to which of the two study centres they attended: one receiving homeopathy in addition to standard treatment (group H) and a control group, receiving standard treatment (group C)...
November 2016: Homeopathy: the Journal of the Faculty of Homeopathy
https://www.readbyqxmd.com/read/27911748/actions-of-steroids-new-neurotransmitters
#7
Lauren M Rudolph, Charlotte A Cornil, Melinda A Mittelman-Smith, Jennifer R Rainville, Luke Remage-Healey, Kevin Sinchak, Paul E Micevych
Over the past two decades, the classical understanding of steroid action has been updated to include rapid, membrane-initiated, neurotransmitter-like functions. While steroids were known to function on very short time spans to induce physiological and behavioral changes, the mechanisms by which these changes occur are now becoming more clear. In avian systems, rapid estradiol effects can be mediated via local alterations in aromatase activity, which precisely regulates the temporal and spatial availability of estrogens...
November 9, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27908454/fulvestrant-500-mg-versus-anastrozole-1-mg-for-hormone-receptor-positive-advanced-breast-cancer-falcon-an-international-randomised-double-blind-phase-3-trial
#8
John F R Robertson, Igor M Bondarenko, Ekaterina Trishkina, Mikhail Dvorkin, Lawrence Panasci, Alexey Manikhas, Yaroslav Shparyk, Servando Cardona-Huerta, Kwok-Leung Cheung, Manuel Jesus Philco-Salas, Manuel Ruiz-Borrego, Zhimin Shao, Shinzaburo Noguchi, Jacqui Rowbottom, Mary Stuart, Lynda M Grinsted, Mehdi Fazal, Matthew J Ellis
BACKGROUND: Aromatase inhibitors are a standard of care for hormone receptor-positive locally advanced or metastatic breast cancer. We investigated whether the selective oestrogen receptor degrader fulvestrant could improve progression-free survival compared with anastrozole in postmenopausal patients who had not received previous endocrine therapy. METHODS: In this phase 3, randomised, double-blind trial, we recruited eligible patients with histologically confirmed oestrogen receptor-positive or progesterone receptor-positive, or both, locally advanced or metastatic breast cancer from 113 academic hospitals and community centres in 20 countries...
November 28, 2016: Lancet
https://www.readbyqxmd.com/read/27902763/temperature-shift-alters-dna-methylation-and-histone-modification-patterns-in-gonadal-aromatase-cyp19a1-gene-in-species-with-temperature-dependent-sex-determination
#9
Yuiko Matsumoto, Brette Hannigan, David Crews
The environment surrounding the embryos has a profound impact on the developmental process and phenotypic outcomes of the organism. In species with temperature-dependent sex determination, gonadal sex is determined by the incubation temperature of the eggs. A mechanistic link between temperature and transcriptional regulation of developmental genes, however, remains elusive. In this study, we examine the changes in DNA methylation and histone modification patterns of the aromatase (cyp19a1) gene in embryonic gonads of red-eared slider turtles (Trachemys scripta) subjected to a temperature shift during development...
2016: PloS One
https://www.readbyqxmd.com/read/27902451/vitamin-d-and-male-reproductive-system
#10
Pablo R Costanzo, Pablo Knoblovits
Vitamin D deficiency is a highly prevalent worldwide condition and affects people of all ages. The most important role of vitamin D is the regulation of intestinal calcium absorption and metabolism of calcium and phosphorus to maintain muscle and bone homeostasis. Furthermore, in recent years it has been discovered that the vitamin D receptor (VDR) is widely distributed in many organs and tissues where vitamin D can perform other actions that include the modulation of the immune response, insulin secretion, anti-proliferative effect on cells of vascular smooth muscle, modulation of the renin-angiotensin-aldosterone system and regulates cell growth in several organs...
December 1, 2016: Hormone Molecular Biology and Clinical Investigation
https://www.readbyqxmd.com/read/27900579/aryl-hydrocarbon-receptor-induced-intratumoral-aromatase-in-breast-cancer
#11
Ryoko Saito, Yasuhiro Miki, Shuko Hata, Takanori Ishida, Takashi Suzuki, Noriaki Ohuchi, Hironobu Sasano
PURPOSE: Aryl hydrocarbon receptor (AhR) inhibits estrogen receptor (ER) pathway, which may suppress estrogen-dependent cell proliferation. However, the correlation between AhR stimulation and intratumoral estrogen synthesis, especially through aromatase, has not been reported to date. In the present study, we examined this correlation in breast cancer cells. METHODS: We examined AhR and aromatase immunoreactivity in 29 patients with invasive ductal carcinoma. We performed in vitro studies using three breast carcinoma cell lines, MCF-7, T47D, and MDA-MB-231...
November 30, 2016: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/27898283/pregestational-type-2-diabetes-and-gestational-diabetes-exhibit-different-sexual-steroid-profiles-during-pregnancy
#12
Claudio Villarroel, Abril Salinas, Patricia López, Paulina Kohen, Gustavo Rencoret, Luigi Devoto, Ethel Codner
Higher androgen levels are observed in non-pregnant women with diabetes. Whether this hormonal profile is found during pregnancy is unknown. The aim of this study was to determine the sexual steroids levels in pregnant women with pregestational type 2 (T2D) and gestational diabetes (GD) compared to healthy control (C) pregnant women during the second half of pregnancy. A prospective study of 69 pregnant women with T2D (n = 21), GD (n = 24) and control (C, n = 24) was followed up during the second half of gestation...
November 29, 2016: Gynecological Endocrinology
https://www.readbyqxmd.com/read/27895740/letrozole-as-second-line-hormonal-treatment-for-recurrent-low-grade-endometrial-stromal-sarcoma-a-case-report-and-review-of-the-literature
#13
Kohei Nakamura, Kentaro Nakayama, Masako Ishikawa, Noriyoshi Ishikawa, Hiroshi Katagiri, Atsuko Katagiri, Tomoka Ishibashi, Emi Sato, Kohji Iida, Razia Sultana, Satoru Kyo
Low-grade endometrial stromal sarcoma (LGESS) is a rare malignancy. The tumor is reportedly responsive to hormonal therapy, most commonly with medroxyprogesterone acetate (MPA), but the effectiveness of aromatase inhibitors for recurrent LGESS remains unclear. The present study reports a case of stage IC LGESS presenting with abnormal uterine bleeding, and also provides a review of the literature. Following a total abdominal hysterectomy and bilateral salpingo-oophorectomy, MPA therapy was initiated; treatment was successful, but discontinued 19 months later due to disruptive side effects...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27895512/are-another-5-years-of-adjuvant-aromatase-inhibitor-therapy-needed
#14
COMMENT
Qin-Guo Mo, De-Quan Li, Jian-Hong Zhong, Chang-Yuan Wei
No abstract text is available yet for this article.
2016: Breast Cancer: Targets and Therapy
https://www.readbyqxmd.com/read/27894075/mammographic-density-a-potential-monitoring-biomarker-for-adjuvant-and-preventative-breast-cancer-endocrine-therapies
#15
REVIEW
Michael S Shawky, Hilary Martin, Honor J Hugo, Thomas Lloyd, Kara L Britt, Andrew Redfern, Erik W Thompson
Increased mammographic density (MD) has been shown beyond doubt to be a marker for increased breast cancer risk, though the underpinning pathobiology is yet to be fully elucidated. Estrogenic activity exerts a strong influence over MD, which consequently has been observed to change predictably in response to tamoxifen anti-estrogen therapy, although results for other selective estrogen receptor modulators and aromatase inhibitors are less consistent. In both primary and secondary prevention settings, tamoxifen-associated MD changes correlate with successful modulation of risk or outcome, particularly among pre-menopausal women; an observation that supports the potential use of MD change as a surrogate marker where short-term MD changes reflect longer-term anti-estrogen efficacy...
November 21, 2016: Oncotarget
https://www.readbyqxmd.com/read/27893427/cholesterol-import-and-steroidogenesis-are-biosignatures-for-gastric-cancer-patient-survival
#16
Wei-Chun Chang, Shang-Fen Huang, Yang-Ming Lee, Hsueh-Chou Lai, Bi-Hua Cheng, Wei-Chung Cheng, Jason Yen-Ping Ho, Long-Bin Jeng, Wen-Lung Ma
Androgens, estrogens, progesterone and related signals are reported to be involved in the pathology of gastric cancer. However, varied conclusions exist based on serum hormone levels, receptor expressions, and in vitro or in vivo studies. This report used a web-based gene survival analyzer to evaluate biochemical processes, including cholesterol importing via lipoprotein/receptors (L/R route), steroidogenic enzymes, and steroid receptors, in gastric cancer patients prognosis. The sex hormone receptors (androgen receptor, progesterone receptor, and estrogen receptor ESR1 or ESR2), L/R route (low/high-density lipoprotein receptors, LDLR/LRP6/SR-B1 and lipoprotein lipase, LPL) and steroidogenic enzymes (CYP11A1, HSD3B1, CYP17, HSD17B1, HSD3B1, CYP19A1 and SRD5A1) were associated with 5-year survival of gastric cancer patients...
November 23, 2016: Oncotarget
https://www.readbyqxmd.com/read/27890559/fluoxetine-and-its-active-metabolite-norfluoxetine-disrupt-estrogen-synthesis-in-a-co-culture-model-of-the-feto-placental-unit
#17
Andrée-Anne Hudon Thibeault, Laetitia Laurent, Sung Vo Duy, Sébastien Sauvé, Patrick Caron, Chantal Guillemette, J Thomas Sanderson, Cathy Vaillancourt
The effects of fluoxetine, one of the most prescribed selective serotonin-reuptake inhibitors (SSRIs) during pregnancy, and its active metabolite norfluoxetine were studied on placental aromatase (CYP19) and feto-placental steroidogenesis Fluoxetine did not alter estrogen secretion in co-culture of fetal-like adrenocortical (H295R) and trophoblast-like (BeWo) cells used as a model of the feto-placental unit, although it induced CYP19 activity, apparently mediated by the serotonin (5-HT) 2A receptor/PKC signalling pathway...
November 24, 2016: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/27889687/role-of-inflammation-in-obesity-related-breast-cancer
#18
REVIEW
Elisa Crespi, Giulia Bottai, Libero Santarpia
Chronic inflammation associated with obesity is now recognized to be an important condition in promoting carcinogenesis and progression in breast cancer patients, mostly in postmenopausal women with tumors expressing estrogen and progesterone receptors. In obese patients, altered levels of several inflammatory mediators regulating aromatase and estrogen expression are one of the mechanisms responsible of increase breast cancer risk. Growing attention has also been paid to the local adipose inflammation and the role played by macrophages as determinants of breast cancer risk recurrence and prognosis...
November 24, 2016: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/27882303/ovarian-like-differentiation-in-eutopic-and-ectopic-endometrioses-with-aberrant-fsh-receptor-insl3-and-gata4-6-expression
#19
Baptiste Fouquet, Pietro Santulli, Jean-Christophe Noel, Micheline Misrahi
Endometriosis, the hormone-dependent extrauterine dissemination of endometrial tissue outside the uterus, affects 5-15% of women of reproductive age. Pathogenesis remains poorly understood as well as the estrogen production by endometriotic tissue yielding autocrine growth. Estrogens (E2) are normally produced by the ovaries. We investigated whether aberrant "ovarian-like" differentiation occurred in endometriosis. 69 women, with (n = 38) and without (n = 31) histologically proven endometriosis were recruited...
December 2016: BBA Clinical
https://www.readbyqxmd.com/read/27881754/neuroendocrine-correlates-of-sex-role-reversal-in-barred-buttonquails
#20
Cornelia Voigt
Sex differences in brain structure and behaviour are well documented among vertebrates. An excellent model exploring the neural mechanisms of sex differences in behaviour is represented by sex-role-reversed species. In the majority of bird species, males compete over access to mates and resources more strongly than do females. It is thought that the responsible brain regions are therefore more developed in males than in females. Because these behaviours and brain regions are activated by androgens, males usually have increased testosterone levels during breeding...
November 30, 2016: Proceedings. Biological Sciences
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