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https://www.readbyqxmd.com/read/28096479/igf-1-receptor-modulates-foxo1-mediated-tamoxifen-response-in-breast-cancer-cells
#1
Ali Vaziri-Gohar, Yan Zheng, Kevin D Houston
: Tamoxifen is a common adjuvant treatment for ERalpha-positive breast cancer patients, however acquired resistance abrogates the efficacy of this therapeutic approach. We recently demonstrated that G protein-coupled estrogen receptor 1 (GPER1) mediates tamoxifen action in breast cancer cells by inducing insulin-like growth factor binding protein-1 (IGFBP-1) to inhibit IGF-1-dependent signaling. To determine if dysregulation of IGFBP-1 induction is associated with tamoxifen resistance, IGFBP-1 transcription was measured in tamoxifen-resistant MCF-7 cells (TamR) after tamoxifen (Tam) treatment...
January 17, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28095041/oral-versus-transdermal-estrogen-in-turner-syndrome-a-systematic-review-and-meta-analysis
#2
Feras Zaiem, Fares Alahdab, Alaa Al Nofal, Mohammad Hassan Murad, Asma Javed
OBJECTIVE: To conduct a systematic review and meta-analysis comparing transdermal estrogens (TDE) versus oral estrogens (OE) in Turner syndrome (TS). METHOD: Randomized trials and observational comparative studies with a minimal follow up of 6 months for skeletal and metabolic outcomes and serum hormone changes. Outcomes were pooled with a random effects model and were reported as mean difference between OE and TDE groups and 95% confidence interval (CI). RESULT: Of 845 candidate references, 4 studies were included...
January 17, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28092404/metformin-versus-myoinositol-which-is-better-in-obese-pcos-patients-a-randomized-controlled-crossover-study
#3
Valeria Tagliaferri, Daniela Romualdi, Valentina Immediata, Simona De Cicco, Christian Di Florio, Antonio Lanzone, Maurizio Guido
CONTEXT: due to the central role of metabolic abnormalities in the pathophysiology of PCOS, insulin sensitising agents have been proposed as a feasible treatment option. OBJECTIVE: to investigate which is the more effective between metformin and myoinositol on hormonal, clinical and metabolic parameters in obese patients with polycystic ovary syndrome (PCOS). STUDY DESIGN: crossover randomized-controlled study. PATIENTS: Thirty-four PCOS obese women (age: 25...
January 16, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28091641/effects-of-pomegranate-extract-in-supplementing-gonadotropin-releasing-hormone-therapy-on-idiopathic-central-precocious-puberty-in-chinese-girls-a-randomized-placebo-controlled-double-blind-clinical-trial
#4
Jinsheng Liu, Jiulai Tang
Central precocious puberty (CPP) without organic abnormality is called idiopathic CPP (ICPP). The objective of this trial was to evaluate the effects of pomegranate extract in supplementing gonadotropin-releasing hormone (GnRH) analog therapy on ICPP-affected girls in the Chinese population. 286 girls, diagnosed with ICPP were initially enrolled into this trial, and among them 225 eligible patients were randomized to receive a combinational GnRH analog treatment supplemented with either a placebo or pomegranate extract on a daily basis for a period of 3 months...
January 16, 2017: Food & Function
https://www.readbyqxmd.com/read/28077498/modulation-of-shbg-binding-to-testosterone-and-estradiol-by-sex-and-morbid-obesity
#5
Maria Del Mar Grasa, José Gulfo, Núria Camps, Rosa Alcalá, Laura Monserrat, José María Moreno-Navarrete, F Ortega, Montserrat Esteve, Xavier Remesar, José Antonio Fernández-López, José Manuel Fernández-Real, Marià Alemany
OBJECTIVE: Sex hormone-binding globulin (SHBG) binds and transports testosterone and estradiol in plasma. The possibility that SHBG is a mixture of transporting proteins has been postulated. We analyzed in parallel the effects of obesity status on the levels and binding capacity of circulating SHBG and their relationship with testosterone and estradiol. DESIGN: Anthropometric measures and plasma were obtained from apparently healthy young (i.e. 35 ± 7 years) premenopausal women (n=32) and men (n=30), with normal weight and obesity (BMI>30 kg·m(-2))...
January 11, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28058854/effect-of-metformin-on-clinical-metabolic-and-endocrine-outcomes-in-women-with-polycystic-ovary-syndrome-a-meta-analysis-of-randomized-controlled-trial
#6
Roshni Patel, Gaurang Shah
OBJECTIVE: Metformin has been used as a treatment option for polycystic ovary syndrome (PCOS) since 1994; however, more than a hundred randomized clinical trials have reported controversial results regarding the efficacy of metformin in PCOS. This could be due to the small sample size and high variability in methodology between studies. The objective of the present meta-analysis was to determine the effect of metformin on clinical, metabolic, endocrine outcomes as compared to placebo in PCOS women...
January 6, 2017: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/28028927/foxc1-is-associated-with-estrogen-receptor-alpha-and-affects-sensitivity-of-tamoxifen-treatment-in-breast-cancer
#7
Jinhua Wang, Yali Xu, Li Li, Lin Wang, Ru Yao, Qiang Sun, Guanhua Du
FOXC1 is a member of Forkhead box transcription factors that participates in embryonic development and tumorigenesis. Our previous study demonstrated that FOXC1 was highly expressed in triple-negative breast cancer. However, it remains unclear what is the relation between FOXC1 and ERα and if FOXC1 regulates expression of ERα. To explore relation between FOXC1 and ERα and discover regulation of ERα expression by FOXC1 in breast cancer, we analyzed data assembled in the Oncomine and TCGA, and found that there was significantly higher FOXC1 expression in estrogen receptor-negative breast cancer than that in estrogen receptor-positive breast cancer...
December 28, 2016: Cancer Medicine
https://www.readbyqxmd.com/read/28011946/high-fat-diet-with-stress-impaired-islets-insulin-secretion-by-reducing-plasma-estradiol-and-pancreatic-glut2-protein-levels-in-rats-proestrus-phase
#8
M Salimi, H Zardooz, F Khodagholi, F Rostamkhani, F Shaerzadeh
This study was conducted to determine whether two estrus phases (proestrus and diestrus) in female rats may influence the metabolic response to a high-fat diet and/or stress, focusing on pancreatic insulin secretion and content. Animals were divided into high-fat and normal diet groups, then each group was subdivided into stress and non-stress groups, and finally, each one of these was divided into proestrus and diestrus subgroups. At the end of high-fat diet treatment, foot-shock stress was applied to the animals...
October 2016: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/27984130/dual-effect-of-insulin-resistance-and-cadmium-on-human-granulosa-cells-in-vitro-study
#9
Muskaan Belani, Preeti Shah, Manish Banker, Sarita Gupta
Combined exposure of cadmium (Cd) and insulin resistance (IR) might be responsible for subfertility. In the present study, we investigated the effects of Cd in vitro in IR human granulosa cells. Isolated human granulosa cells from control and polycystic ovary syndrome (PCOS) follicular fluid samples were confirmed for IR by decrease in protein expression of insulin receptor-β. Control and IR human granulosa cells were then incubated with or without 32μM Cd. The combined effect of IR with 32μM Cd in granulosa cells demonstrated significant decrease in expression of StAR, CYP11A1, CYP19A1, 17β-HSD, 3β-HSD, FSH-R and LH-R...
October 28, 2016: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/27973382/lower-insulin-sensitivity-is-related-to-lower-relative-muscle-cross-sectional-area-lower-muscle-density-and-lower-handgrip-force-in-young-and-middle-aged-non-diabetic-men
#10
T Gysel, C Tonoli, S Pardaens, D Cambier, J-M Kaufman, H-G Zmierczak, S Goemaere, B Lapauw, P Calders
OBJECTIVES: This study investigated whether an association between insulin resistance (IR) and muscle parameters is appreciable in young healthy men, independent of obesity. Furthermore, markers of muscle metabolism and hormones/possible determinants, were explored. METHODS: 358 healthy young men were divided into a less and more insulin sensitive (LIS [age=33.2±5.4, BMI=23.4±2.3] and MIS [age=35.5±5.3, BMI=28.1±3.7]) group based on upper and lower quartile of HOMA-IR...
December 14, 2016: Journal of Musculoskeletal & Neuronal Interactions
https://www.readbyqxmd.com/read/27914732/interaction-of-sex-steroid-hormones-and-obesity-on-insulin-resistance-and-type-2-diabetes-in-men-the-third-national-health-and-nutrition-examination-survey
#11
Ji Li, Hong Lai, Shaoguang Chen, Hong Zhu, Shenghan Lai
AIMS: We examined interaction of sex steroid hormones and obesity with regard to insulin resistance (IR) and type 2 diabetes (T2D) by using nationally representative data from the US. METHODS: Data of 1461 men aged ≥20years who participated in the Third National Health and Nutrition Examination Survey were analyzed. Multiplicative interaction was calculated by cross-product interaction terms in multivariable logistic regression models. Additive interaction was assessed by the relative excess risk due to interaction (RERI)...
October 22, 2016: Journal of Diabetes and its Complications
https://www.readbyqxmd.com/read/27908213/determinants-of-low-bone-mineral-density-in-premenopausal-polycystic-ovary-syndrome-patients
#12
Cihan Karadağ, Tevfik Yoldemir, Dilek Gogas Yavuz
OBJECTIVE: The aim of this study was to evaluate the bone mineral density (BMD) values and to determine the associations between BMD and insulin sensitivity, hyperandrogenemia, body mass index (BMI), and sex hormones in premenopausal polycystic ovary syndrome (PCOS) patients. METHODS: A hundred and three women with PCOS and sixty age- and BMI-matched healthy control women were enrolled to this cross-sectional study. Serum androgen and estradiol (E2) levels were measured...
December 2, 2016: Gynecological Endocrinology
https://www.readbyqxmd.com/read/27901601/activation-of-estrogen-response-element-independent-er%C3%AE-signaling-protects-female-mice-from-diet-induced-obesity
#13
Ali Yasrebi, Janelle A Rivera, Elizabeth A Krumm, Jennifer A Yang, Troy A Roepke
17β-estradiol (E2) regulates central and peripheral mechanisms that control energy and glucose homeostasis predominantly through estrogen receptor α (ERα) acting via receptor binding to estrogen response elements (ERE). ERα signaling is also involved in mediating the effects of E2 on diet-induced obesity (DIO), although the roles of ERE-dependent and -independent ERα signaling in ameliorating the effects of DIO remain largely unknown. We hypothesize that ERE-dependent ERα signaling is necessary to ameliorate the effects of DIO...
November 30, 2016: Endocrinology
https://www.readbyqxmd.com/read/27901182/does-insulin-resistance-increase-thyroid-volume-in-patients-with-polycystic-ovary-syndrome
#14
Murat Sahin, Didem Demircioglu, Ayten Oguz, Dilek Tuzun, Mehmet Akif Sarica, Elif Inanc, Kamile Gul
Objective: To investigate the effect of gonadotropin, sex hormone levels and insulin resistance (IR) on thyroid functions and thyroid volume (TV) in polycystic ovary syndrome (PCOS). Subjects and methods: 69 new diagnosed PCOS patients (age 24.82 ± 6.17) and 56 healthy control female (age 26.69 ± 5.25) were involved to the study. Fasting plasma glucose, lipid profile, insulin, thyroid stimulating hormone (TSH), free thyroxine (fT4), estradiol (E2), luteinizing hormone (LH), follicle stimulating hormone levels and urine iodine were measured in all participants...
November 24, 2016: Archives of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27898988/lipid-accumulation-product-lap-as-an-index-of-metabolic-and-hormonal-disorders-in-aging-men
#15
I Rotter, A Rył, A Szylińska, W Pawlukowska, A Lubkowska, M Laszczyńska
Lipid accumulation product (LAP) is an index used for evaluating lipid overaccumulation in adults. Our study aimed at assessing associations between LAP and metabolic syndrome (MetS) and its components, age-related testosterone deficiency syndrome (TDS), low-density cholesterol (LDL), as well as HOMA-IR (insulin resistance ratio), insulin level in non-diabetics and total testosterone (TT), estradiol E2, dehydroepiandrosterone sulphate (DHEAs) and sex hormone-binding globulin (SHBG) in aging men.313 men aged 50-75 were surveyed with regard to the prevalence of diabetes (T2DM) and hypertension (HT)...
November 29, 2016: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/27898283/pregestational-type-2-diabetes-and-gestational-diabetes-exhibit-different-sexual-steroid-profiles-during-pregnancy
#16
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/27865406/an-adverse-immune-endocrine-profile-in-patients-with-tuberculosis-and-type-2-diabetes
#17
R Fernández, A Díaz, L D'Attilio, B Bongiovanni, N Santucci, D Bertola, H Besedovsky, A Del Rey, M L Bay, O Bottasso
Diabetes is a risk factor for the development of pulmonary tuberculosis (TB) and both diseases present endocrine alterations likely to play a role in certain immuno-endocrine-metabolic associated disorders. Patients with TB, or with TB and type 2 diabetes (TB + T2DM) and healthy controls (HCo) were assessed for plasma levels of cortisol, dehydroepiandrosterone (DHEA), estradiol, testosterone, growth hormone (GH), prolactin, insulin-like growth factor-1 (IGF-1), cytokines (IL-6, IL-10, IFN-γ) and the specific lymphoproliferative capacity of peripheral blood mononuclear cells...
December 2016: Tuberculosis
https://www.readbyqxmd.com/read/27855752/sleep-characteristics-and-carotid-atherosclerosis-among-midlife-women
#18
Rebecca C Thurston, Yuefang Chang, Roland von Känel, Emma Barinas-Mitchell, J Richard Jennings, Martica H Hall, Nanette Santoro, Daniel J Buysse, Karen A Matthews
STUDY OBJECTIVES: Midlife, which encompasses the menopause transition in women, can be a time of disrupted sleep and accelerated atherosclerosis accumulation. Short or poor sleep quality has been associated with cardiovascular disease (CVD) risk; few studies have investigated relations among midlife women. We tested whether shorter actigraphy sleep time or poorer subjective sleep quality was associated with carotid atherosclerosis among midlife women. METHODS: 256 peri- and postmenopausal women aged 40-60 completed three days of wrist actigraphy, hot flash monitoring, questionnaires [Pittsburgh Sleep Quality Index (PSQI), Berlin], a blood draw, and carotid ultrasound [intima media thickness (IMT), plaque]...
November 14, 2016: Sleep
https://www.readbyqxmd.com/read/27843797/does-endothelial-dysfunction-correlate-with-endocrinal-abnormalities-in-patients-with-polycystic-ovary-syndrome
#19
REVIEW
Rajani Dube
To study and critically analyze the published evidence on correlation of hormonal abnormalities and endothelial dysfunction (ED) in polycystic ovary syndrome (PCOS) through a systematic review. The databases including MEDLINE, PubMed, Up-To-Date, and Science Direct were searched using Medical subject handling terms and free text term keywords such as endocrine abnormalities in PCOS, ED assessment in PCOS, ED in combination with insulin resistance (IR), hyperandrogenism (HA), increased free testosterone, free androgen index (FAI), gonadotrophin levels, luteinizing hormone (LH), prolactin, estrogen, adipocytokines to search trials, and observational studies published from January 1987 to September 2015...
October 2016: Avicenna Journal of Medicine
https://www.readbyqxmd.com/read/27837347/tamoxifen-resistance-and-metastasis-of-human-breast-cancer-cells-were-mediated-by-the-membrane-associated-estrogen-receptor-er-%C3%AE-36-signaling-in-vitro
#20
Wenwen Gu, Nian Dong, Peng Wang, Changgen Shi, Jun Yang, Jian Wang
The drug resistance and tumor metastasis have been the main obstacles for the longer-term therapeutic effects of tamoxifen (TAM) on estrogen receptor-positive (ER(+)) breast cancer, but the mechanisms underlying the TAM resistance are still unclear. Here, we demonstrated that the membrane-associated estrogen receptor ER-α36 signaling, but not the G protein-coupled estrogen receptor 1 (GPER1) signaling, might be involved in the TAM resistance and metastasis of breast cancer cells. In this study, a model of ER(+) breast cancer cell MCF-7 that involves the up-regulated expression of ER-α36 and unchanged expression of ER-α66 and GPER1 was established via the removal of insulin from the cell culture medium...
November 11, 2016: Cell Biology and Toxicology
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