Read by QxMD icon Read


M P Machado, I Matos, A R Grosso, M Schartl, M M Coelho
Sex determination is a highly variable process that utilizes many different mechanisms to initiate the cascade of differentiation processes. The molecular pathways controlling sexual development are less conserved than previously assumed, and appear to require active maintenance in some species; indeed, the developmental decision of gonad phenotype in gonochoristic species is not fixed at an early developmental stage. Much of the knowledge about sex determination mechanisms was derived from research on gonochoristic, non-seasonal breeders...
October 22, 2016: Molecular Reproduction and Development
Gerald J Pepe, Adina Maniu, Graham Aberdeen, Terrie J Lynch, Soon Ok Kim, Jerry Nadler, Eugene D Albrecht
We recently demonstrated that offspring delivered to baboons deprived of estrogen during the second half of gestation exhibited insulin resistance prior to onset of puberty. Because gonadal hormones have a profound effect on insulin action and secretion in adults, we determined whether insulin resistance is retained after initiation of gonadal secretion of testosterone and estradiol. Glucose tolerance tests were performed in postpubertal baboon offspring of untreated and letrozole-treated animals (serum estradiol reduced >95 %)...
October 21, 2016: Endocrine
Milad C El Hajj, Van K Ninh, Elia C El Hajj, Jessica M Bradley, Jason D Gardner
We have previously demonstrated the cardioprotective effects of ovarian hormones against adverse ventricular remodeling imposed by chronic volume overload. Here, we assess the estrogen receptor dependence of this cardioprotection. Four groups of female rats were studied: sham-operated (SHAM), volume overloaded (ACF), SHAM treated with estrogen receptor antagonist, ICI 182,780 (SHAM+ICI), and ACF treated with ICI. Cardiac function was assessed temporally using echocardiogram and tissue samples were collected at 5 days and 6 weeks post-surgery...
October 21, 2016: American Journal of Physiology. Heart and Circulatory Physiology
Alena Škodová, Roman Prokeš, Zdeněk Šimek, Branislav Vrana
In situ extraction of steroid hormones from waste water using adsorption-based integrative passive samplers represents a promising approach for their monitoring in water at ultra-trace concentrations. Three passive samplers, namely a POCIS, a Chemcatcher fitted with an Empore SDB-RPS disk, and an Empore SDB-RPS disk-based sampler with enhanced water flow, were calibrated in situ in treated municipal wastewater for the purpose of monitoring five estrogens (17-β-estradiol, 17-α-estradiol, 17-α-ethinylestradiol, estrone and estriol) at sub ng per litre concentrations...
December 1, 2016: Talanta
E Kamanga-Sollo, K J Thornton, M E White, W R Dayton
In feedlot steers, estradiol-17β (E2) and combined E2 and trenbolone acetate (a testosterone analog) implants enhance rate and efficiency of muscle growth; and, consequently, these compounds are widely used as growth promoters in several countries. Treatment with E2 stimulates protein synthesis rate and suppresses protein degradation rate in fused bovine satellite cell (BSC) cultures; however, the mechanisms involved in these effects are not known with certainty. Although the genomic effects of E2 mediated through the classical estrogen receptors have been characterized, recent studies indicate that binding of E2 to the G protein-coupled estrogen receptor (GPER)-1 mediates nongenomic effects of E2 on cellular function...
September 13, 2016: Domestic Animal Endocrinology
Laura A Colangelo, Pamela Ouyang, Sherita Hill Golden, Moyses Szklo, Susan M Gapstur, Dhananjay Vaidya, Kiang Liu
INTRODUCTION: Considering that estradiol (E2) and n-3 polyunsaturated fatty acids (PUFAs) have roles in neurogenesis and in neurotransmission, we examined whether the association of PUFAs with incident depressive symptoms in postmenopausal women is modified by hormone therapy (HT) use or estrogen status. METHODS: Women (N=1616) free of depressive symptoms at baseline (2000-2002) in the Multi-Ethnic Study of Atherosclerosis were classified by HT usage and quartiles of dietary eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), and the sum EPA+DHA...
October 14, 2016: Psychoneuroendocrinology
Bang-Shun He, Tao Xu, Yu-Qin Pan, Han-Jin Wang, William C Cho, Kang Lin, Hui-Ling Sun, Tian-Yi Gao, Shu-Kui Wang
Polymorphisms in nucleotide excision repair (NER) pathway genes are associated with the risk of breast cancer, but the relevance of these associations appeared to vary according to the ethnicity of the subjects. To systemically evaluate the potential associations between NER polymorphisms and breast cancer risk in a Chinese population, we carried out a case-control study on 450 breast cancer patients and 430 healthy controls. Sequenom MassARRAY was used for genotyping, and immunohistochemistry was performed to detect estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor receptor 2 (HER-2) expression in tumor tissue...
October 19, 2016: Oncotarget
Nadia Mohd Effendy, Mohd Fadhli Khamis, Ahmad Nazrun Shuid
BACKGOUND: Labisia pumila (LP) is a popular herb used by women over the past few decades. This herb has shown potentials as an alternative agent for treatment and prevention of postmenopausal osteoporosis. It was observed in previous studies that supplementation to ovariectomized rats were associated with increased bone antioxidative enzymes and reduced lipid peroxidation activity. It had also improved bone formation markers in ovariectomized rats. This study aimed to evaluate the effects of giving different forms of LP extracts on the trabecular bone microarchitecture of ovariectomised rats...
October 21, 2016: Journal of X-ray Science and Technology
Katherine Amy Lin, Colin Rundel, P Murali Doraiswamy
BACKGROUND: Prior studies have noted gender differences in cognition, imaging, and pathological markers in mild cognitive impairment (MCI) subjects. Sex hormone-binding globulin (SHBG), a major controlling factor in the proportion of bioavailable versus bound testosterone and estrogen, has been proposed to contribute to links between hormones and dementia, but has not yet been investigated fully in a prospective biomarker trial. OBJECTIVE: This study examined whether, among subjects with MCI, SHBG levels predict future rate of cognitive decline...
October 20, 2016: Journal of Alzheimer's Disease: JAD
Marian L Neuhouser, Ashley Wilder Smith, Stephanie M George, James T Gibson, Kathy B Baumgartner, Richard Baumgartner, Catherine Duggan, Leslie Bernstein, Anne McTiernan, Rachel Ballard
PURPOSE: Use of complementary and alternative medicine (CAM) is common among breast cancer patients, but less is known about whether CAM influences breast cancer survival. METHODS: Health Eating, Activity, and Lifestyle (HEAL) Study participants (n = 707) were diagnosed with stage I-IIIA breast cancer. Participants completed a 30-month post-diagnosis interview including questions on CAM use (natural products such as dietary and botanical supplements, alternative health practices, and alternative medical systems), weight, physical activity, and comorbidities...
October 21, 2016: Breast Cancer Research and Treatment
Nadia F Nocera, M Catherine Lee, Lucy M De La Cruz, Cinthia Rosemblit, Brian J Czerniecki
The ErbB/B2 (HER-2/neu) oncogene family plays a critical role in the development and metastatic spread of several tumor types including breast, ovarian and gastric cancer. In breast cancer, HER-2/neu is expressed in early disease development in a large percentage of DCIS lesions and its expression is associated with an increased risk of invasion and recurrence. Targeting HER-2 with antibodies such as trastuzumab or pertuzumab has improved survival, but patients with more extensive disease may develop resistance to therapy...
2016: Frontiers in Pharmacology
Chihua Wu, Jing Luo
BACKGROUND Long non-coding RNA (lncRNA) UCA1 is an oncogene in breast cancer. The purpose of this study was to investigate the role of UCA1 in tamoxifen resistance of estrogen receptor positive breast cancer cells. MATERIAL AND METHODS Tamoxifen sensitive MCF-7 cells were transfected for UCA1 overexpression, while tamoxifen resistant LCC2 and LCC9 cells were transfected with UCA siRNA for UCA1 knockdown. qRT-PCR was performed to analyze UCA1 expression. CCK-8 assay, immunofluorescence staining of cleaved caspase-9, and flow cytometric analysis of Annexin V/PI staining were used to assess tamoxifen sensitivity...
October 21, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
Hui Yao, Guangchun He, Shichao Yan, Chao Chen, Liujiang Song, Thomas J Rosol, Xiyun Deng
Triple-negative breast cancer (TNBC), which accounts for 15-20% of all breast cancers, does not express estrogen receptor (ER) or progesterone receptor (PR) and lacks human epidermal growth factor receptor 2 (HER2) overexpression or amplification. These tumors have a more aggressive phenotype and a poorer prognosis due to the high propensity for metastatic progression and absence of specific targeted treatments. Patients with TNBC do not benefit from hormonal or trastuzumab-based targeted therapies because of the loss of target receptors...
September 27, 2016: Oncotarget
Jianfeng Lu, Donna McEachern, Shunqiang Li, Matthew J Ellis, Shaomeng Wang
Endocrine therapy has been highly effective for the treatment of estrogen-receptor positive breast cancer, but endocrine resistance develops in a significant proportion of patients. In an effort to develop novel therapeutic strategies for the treatment of endocrine resistant breast cancer, we have evaluated a potent and specific MDM2-p53 interaction inhibitor, MI-77301, which has been advanced into clinical development, for its therapeutic potential and mechanism of action in vitro and in vivo in WHIM9 and WHIM18 patient-derived xenograft (PDX) models...
October 7, 2016: Molecular Cancer Therapeutics
Ion Cristobal, Blanca Torrejón, Manuel Pedregal, Federico G Rojo, Jesús García-Foncillas
Dear Editor, We have read with great interest the recent published manuscript by Caiazza et al. (2016), which provides novel exciting findings about the potential therapeutic value of enzalutamide in patients with androgen receptor (AR)-positive triple negative breast cancer (TNBC). Some previous studies have shown promising antitumor effects of this drug in breast tumors. Thus, enzalutamide-mediated AR inhibition has been reported to reduce proliferation, anchorage-independent growth, migration, and invasion and increases apoptosis of TNBC cells in vitro and decrease viability of TNBC xenografts in vivo (Cochrane et al...
October 20, 2016: Endocrine-related Cancer
Rosamaria Lappano, Roberta Malaguarnera, Antonino Belfiore, Marcello Maggiolini
Certain environmental chemicals may accumulate in human serum and tissues eliciting estrogenic and/or carcinogenic effects. Therefore, there is heightened interest in determining whether environmental chemicals may increase the risk for endocrine-related tumors like breast cancer. For instance, metals as cadmium, zinc, copper, iron, nickel and aluminum have been shown to mimic estrogen action. Moreover, the exposure to these chemicals has been reported to stimulate diverse malignancies including breast cancer, which is the most common tumor in women worldwide...
October 17, 2016: Molecular and Cellular Endocrinology
Wenchen Pu, Yun Yuan, Danfeng Lu, Xin Wang, Hanwei Liu, Chun Wang, Fei Wang, Guolin Zhang
Estrogen biosynthesis is pivotal to many physiological processes of human. Aberrant estrogen level is closely related to a variety of diseases, including breast cancer and osteoporosis. Previously we found that 2-phenylbenzo[b]furan glycosides could promote estrogen biosynthesis. To find high active 2-phenylbenzo[b]furans, fifty-four 2-phenylbenzo[b]furans were prepared via four strategies according to corresponding substrate scopes. Biological evaluation in HEK293A cells showed that some compounds exhibited promotive activity on estrogen biosynthesis...
October 8, 2016: Bioorganic & Medicinal Chemistry Letters
Sarav S Shah, Alexander M Satin, James R Mullen, Sara Merwin, Mark Goldin, Nicholas A Sgaglione
BACKGROUND: Prior to 2012, the American Academy of Orthopaedic Surgeons (AAOS) and American College of Chest Physicians (ACCP) differed in their recommendations for postoperative pharmacologic venous thromboembolism prophylaxis (VTEP) after total joint arthroplasty. More specifically, aspirin (ASA) monotherapy was not endorsed by the ACCP as an acceptable prophylaxis. In 2012, the ACCP supported ASA monotherapy compared with no prophylaxis. Our aim was to investigate the impact of the convergence of ACCP and AAOS recommendations on surgeon prescribing patterns after knee arthroplasty (KA)...
October 20, 2016: Journal of Orthopaedic Surgery and Research
Susan M Farabaugh, Bonita T Chan, Xiaojiang Cui, Robert K Dearth, Adrian V Lee
BACKGROUND: ErbB2 Receptor Tyrosine Kinase 2 (ErbB2, HER2/Neu) is amplified in breast cancer and associated with poor prognosis. Growing evidence suggests interplay between ErbB2 and insulin-like growth factor (IGF) signaling. For example, ErbB2 inhibitors can block IGF-induced signaling while, conversely, IGF1R inhibitors can inhibit ErbB2 action. ErbB receptors can bind and phosphorylate insulin receptor substrates (IRS) and this may be critical for ErbB-mediated anti-estrogen resistance in breast cancer...
October 21, 2016: Cell Communication and Signaling: CCS
Marc A Becker, Xiaonan Hou, Piyawan Tienchaianada, Brian B Haines, Sean C Harrington, S John Weroha, Sriram Sathyanarayanan, Paul Haluska
BACKGROUND: Mammalian target of rapamycin (mTOR) represents a key downstream intermediate for a myriad of oncogenic receptor tyrosine kinases. In the case of the insulin-like growth factor (IGF) pathway, the mTOR complex (mTORC1) mediates IGF-1 receptor (IGF-1R)-induced estrogen receptor alpha (ERα) phosphorylation/activation and leads to increased proliferation and growth in breast cancer cells. As a result, the prevalence of mTOR inhibitors combined with hormonal therapy has increased in recent years...
October 20, 2016: BMC Cancer
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"