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https://www.readbyqxmd.com/read/28429258/hormonal-regulation-of-nk-cell-cytotoxic-activity
#1
S V Shirshev, I V Nekrasova, O L Gorbunova, E G Orlova
The effects of chorionic gonadotropin, estriol (E3), leptin, ghrelin, and kisspeptin on the intracellular expression of perforin, granzyme A, and granzyme B was studied in separated NK cells. All studied hormones except E3 are could modulate the expression of cytotoxic enzymes in NK cells by suppression of the expression of the most active proapoptotic agents, resulting in increased expression of granzyme A, which is typical of the decidual subpopulation of these lymphocytes.
January 2017: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/28410522/development-of-matrix-effect-free-mispe-uhplc-ms-ms-method-for-determination-of-lovastatin-in-pu-erh-tea-oyster-mushroom-and-red-yeast-rice
#2
Pavel Svoboda, Daniel Sander, Kateřina Plachká, Lucie Nováková
Matrix effect-free UHPLC-MS/MS method was developed and validated for the determination of cholesterol-lowering lovastatin in food samples represented by Pu-erh tea, oyster mushroom, and red yeast rice. The resulting method was fully validated in terms of intra-day and inter-day precision, accuracy, linearity, range, LOD, LOQ, and matrix effects. The matrix effect phenomenon evaluated by comparison of slopes of calibration curves was completely eliminated by solid-phase extraction based on the technique of molecularly imprinted polymers (MIPs)...
June 5, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28402303/ferrrate-vi-and-freeze-thaw-treatment-for-oxidation-of-hormones-and-inactivation-of-fecal-coliforms-in-sludge
#3
James Diak, Banu Örmeci
This study examined the individual and combined effects of potassium ferrate(VI) additions and freeze-thaw conditioning for the treatment and dewatering of wastewater sludge in cold climates, with particular focus on the inactivation of fecal coliforms and oxidation of estrogens, androgens, and progestogens. The first phase of the study evaluated the effects of potassium ferrate(VI) pre-treatment followed by freeze-thaw at -20 °C using a low (0.5 g/L) and high (5.0 g/L) dose of potassium ferrate(VI). The results showed that pre-treatment of anaerobically digested sludge with 5 g/L of potassium ferrate(VI) reduced the concentration of fecal coliforms in the sludge cake to below 100 MPN/g DS...
April 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28392734/proficiency-testing-of-maternal-serum-prenatal-screening-in-second-trimester-in-china-2015
#4
Xiaoyan Zhang, Wei Wang, Falin He, Kun Zhong, Shuai Yuan, Zhiguo Wang
INTRODUCTION: Prenatal screening and diagnosis is important for the detection of birth defects and genetic diseases. The nationwide proficiency testing (PT) of maternal serum prenatal screening in second trimester in China has been launched since 2003 and partly reflected the performance of screening laboratories. This study analysed the 2015 PT results to examine the performance of clinical laboratories and different platforms. MATERIALS AND METHODS: Fifteen lyophilized samples with different concentrations divided into three panels, were distributed to 613 clinical laboratories in 2015...
February 15, 2017: Biochemia Medica: časopis Hrvatskoga Društva Medicinskih Biokemičara
https://www.readbyqxmd.com/read/28385051/the-mid-gestation-triple-test-profile-among-women-diagnosed-with-vasa-previa
#5
Yaakov Melcer, Reuven Sharony, Marina Pekar-Zlotin, Josef Tovbin, Noam Smorgick, Howard Cuckle, Ron Maymon
Purpose To assess the mid-trimester triple test biomarkers among women diagnosed with vasa previa. Methods The study included 43 singleton pregnancies diagnosed with vasa previa between the years 1988 to 2011. The mid-gestation screening test for Down syndrome was calculated from the combination of triple serum markers and maternal age, and expressed as a multiple of the gestation specific normal mean (MoM). Reference MoM values were calculated from the local population. The levels of mid-gestation maternal serum alpha-fetoprotein (AFP), human chorionic gonadotropin (hCG) and unconjugated estriol (uE3) of patients with VP were compared with control reference group...
April 6, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28375935/estriol-emerging-clinical-benefits
#6
Emad S Ali, Cheyenne Mangold, Alan N Peiris
OBJECTIVE: Estriol is the main estrogen in pregnancy, but has received less attention outside gestation. It is well known that pregnancy has an immunosuppressive effect on many autoimmune diseases such as multiple sclerosis, psoriasis, thyroiditis, uveitis, and rheumatoid arthritis. Emerging evidence indicates that estriol has potential immunomodulatory benefits for many disease states including autoimmune, inflammatory, and neurodegenerative conditions. In this review, we discuss emerging roles for estriol in the treatment of menopausal symptoms, osteoporosis, cancer, hyperlipidemia, vascular disease, and multiple sclerosis...
April 3, 2017: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/28363417/multiresidue-determination-of-estrogens-in-different-dairy-products-by-ultra-high-performance-liquid-chromatography-triple-quadrupole-mass-spectrometry
#7
Bárbara Socas-Rodríguez, Antonio V Herrera-Herrera, Javier Hernández-Borges, Miguel Ángel Rodríguez-Delgado
In this work, a simple and fast methodology has been validated and applied for the analysis of a group of 22 estrogenic compounds including eight phytoestrogens (i.e. daidzein, enterodiol, glycitein, enterolactone, genistein, formononetin, prunetin, biochanin A), six mycotoxins (β-zearalanol, β-zearalenol, α-zearalanol, α-zearalenol, zearalanone, zearalenone) as well as four synthetic (i.e. ethynylestradiol, diethylstilbestrol, dienestrol, hexestrol) and four natural estrogens (i.e. estriol, 17β-estradiol, 17α-estradiol, estrone) in different dairy products...
March 19, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28359553/planar-yeast-estrogen-screen-with-resorufin-%C3%AE-d-galactopyranoside-as-substrate
#8
Dinah Schick, Wolfgang Schwack
For the planar yeast estrogen screen (pYES), 4-methylumbelliferyl-β-d-galactopyranoside was generally employed as substrate, delivering blue fluorescing 4-methylumbelliferone after enzymatic cleavage by the YES reporter β-d-galactosidase as the positive signal for the presence of estrogen active compounds (EAC). As environmental samples like waste water also contain blue fluorescent components, it is difficult to differentiate them from pYES signals. Therefore, resorufin-β-d-galactopyranoside (RGP), providing the orange fluorescing resorufin after enzymatic cleavage, was introduced as pYES substrate to determine EAC...
March 21, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28357784/expression-of-a-new-laccase-from-moniliophthora-roreri-at-high-levels-in-pichia-pastoris-and-its-potential-application-in-micropollutant-degradation
#9
Agathe Bronikowski, Peter-Leon Hagedoorn, Katja Koschorreck, Vlada B Urlacher
Laccases have gained significant attention due to their emerging applications including bioremediation, biomass degradation and biofuel cells. One of the prerequisites for the industrial application of laccases is their sufficient availability. However, expression levels of recombinantly expressed laccases are often low. In this study Mrl2, a new laccase from the basidiomycete Moniliophthora roreri, was cloned in Pichia pastoris and produced in an optimized fed-batch process at an exceptionally high yield of 1...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28350758/effects-of-ultralow-topic-estriol-dose-on-vaginal-health-and-quality-of-life-in-postmenopausal-women-who-underwent-surgical-treatment-for-pelvic-organ-prolapse
#10
Salvatore Caruso, Stefano Cianci, Salvatore Giovanni Vitale, Maria Grazia Matarazzo, Francesca Flavia Amore, Antonio Cianci
OBJECTIVE: To evaluate the efficacy of low concentrations of vaginal estriol gel in postmenopausal women with pelvic static disorders before and after vaginal surgical treatment, assessing vaginal health, sexual function, and quality of life (QoL). METHODS: Women affected by genital prolapse were enrolled. Vaginal health, QoL, and sexual function were investigated at baseline (T0), before surgery (T1), and 13 weeks after surgery (T2). At baseline, participants were randomized 1:1...
March 27, 2017: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/28342373/using-quantum-chemical-modeling-and-calculations-for-evaluation-of-cellulose-potential-for-estrogen-micropollutants-removal-from-water-effluents
#11
Amin Ghasemi, Milad Asgarpour Khansary, Azam Marjani, Saeed Shirazian
This paper is devoted to investigate the suitability of cellulose for estrogens micropollutants removal from water effluent. For this purpose, the sorption of eight estrogens including Estradiol, Estrone, Testosterone, Progesterone, Estriol, Mestranol, Ethinylestradiol and Diethylstilbestrol were investigated. The charge density profiles and sorption curves were obtained and discussed using quantum chemical calculations where the Accelrys Materials Studio software and COSMO-SAC model were employed. The geometry optimization of compound molecule and energy minimizations was performed using the Dmol3 Module and density functional theory of generalized gradient approximate and Volsko-Wilk-Nusair functional...
March 3, 2017: Chemosphere
https://www.readbyqxmd.com/read/28342046/sources-mechanisms-and-fate-of-steroid-estrogens-in-wastewater-treatment-plants-a-mini-review
#12
Yien Fang Ting, Sarva Mangala Praveena
Steroid estrogens, such as estrone (E1), 17β-estradiol (E2), estriol (E3), and 17α-ethinylestradiol (EE2), are natural and synthetic hormones released into the environment through incomplete sewage discharge. This review focuses on the sources of steroid estrogens in wastewater treatment plants (WWTPs). The mechanisms and fate of steroid estrogens throughout the entire wastewater treatment system are also discussed, and relevant information on regulatory aspects is given. Municipal, pharmaceutical industry, and hospitals are the main sources of steroid estrogens that enter WWTPs...
April 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28295771/analysis-of-17%C3%AE-estradiol-estriol-and-estrone-in-american-eel-anguilla-rostrata-tissue-samples-using-liquid-chromatography-coupled-to-electrospray-differential-ion-mobility-tandem-mass-spectrometry
#13
Alejandro Cohen, Neil W Ross, Paul M Smith, James P Fawcett
RATIONALE: 17β-Estradiol (E2), estrone (E1) and estriol (E3) are steroid hormones responsible for the regulation of the female reproductive system. Estradiol is planned to be used to feminize eels in aquaculture in order to improve their size and marketability. The residual levels of these hormones in fish tissue must be monitored to meet the requirements of food regulatory agencies. Few studies have studied these hormones on complex biological matrices such as fish tissue. METHODS: We developed a method to analyze E1, E2 and E3 in fish tissue using liquid chromatography in combination with differential ion mobility spectrometry (DMS) and tandem mass spectrometry (MS/MS)...
March 11, 2017: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28284347/novel-feedback-loop-between-m2-macrophages-microglia-and-regulatory-b-cells-in-estrogen-protected-eae-mice
#14
Gil Benedek, Jun Zhang, Ha Nguyen, Gail Kent, Hilary Seifert, Arthur A Vandenbark, Halina Offner
Immunoregulatory sex hormones, including estrogen and estriol, may prevent relapses in multiple sclerosis during pregnancy. Our previous studies have demonstrated that regulatory B cells are crucial for estrogen-mediated protection against experimental autoimmune encephalomyelitis (EAE). Herein, we demonstrate an estrogen-dependent induction of alternatively activated (M2) macrophages/microglia that results in an increased frequency of regulatory B cells in the spinal cord of estrogen treated mice with EAE...
April 15, 2017: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/28278220/placental-hormone-profiles-as-predictors-of-preterm-birth-in-twin-pregnancy-a-prospective-cohort-study
#15
Hui Lim, Sioned Powell, Helen C Mcnamara, A Forbes Howie, Ann Doust, Maria E Bowman, Roger Smith, Jane E Norman, Sarah J Stock
OBJECTIVE: The objective of the study was to analyse placental hormone profiles in twin pregnancies to determine if they could be used to predict preterm birth. STUDY DESIGN: Progesterone, estradiol, estriol and corticotropin-releasing hormone were measured using competitive immunoassay and radioimmunoassay in serum and saliva samples of 98 women with twin pregnancies,at 3 or more gestational timepoints. Hormone profiles throughout gestation were compared between very preterm (<34 weeks; n = 8), preterm (<37 weeks; n = 40) and term (37+ weeks; n = 50) deliveries...
2017: PloS One
https://www.readbyqxmd.com/read/28267367/systematic-indirect-comparison-of-ospemifene-versus-local-estrogens-for-vulvar-and-vaginal-atrophy
#16
N Bruyniks, N Biglia, S Palacios, A O Mueck
In the absence of a direct head-to-head study, we performed an indirect historical comparison of ospemifene 60 mg (Senshio(®)) vs. local vaginal estrogens in moderate or severe vulvar and vaginal atrophy (VVA). A literature search was carried out of clinical efficacy/safety trials of local vaginal estrogens in VVA approved in Europe. For efficacy comparison, studies had to be placebo-controlled and of 12 weeks' duration. For safety comparison, studies had to be ≥40 weeks' duration. Efficacy endpoints were the difference between active and placebo in change from baseline to week 12 for symptoms, vaginal pH, and maturation value (MV)...
March 7, 2017: Climacteric: the Journal of the International Menopause Society
https://www.readbyqxmd.com/read/28260987/prediction-of-gestational-diabetes-mellitus-by-unconjugated-estriol-levels-in-maternal-serum
#17
Junguk Hur, Eun-Hee Cho, Kwang-Hyun Baek, Kyung Ju Lee
The aim of this study was to evaluate the association between maternal serum estriol levels, which are routinely measured in the first trimester of pregnancy, and adverse pregnancy outcomes including gestational diabetes. We performed a retrospective chart analysis of women who delivered between July 1, 2007, and December 31, 2009, at Kangnam CHA Medical Center in Seoul, Korea. Only patients with available estriol measurements during their pregnancies and complete follow-up data were included in the study. The effect of estriol on the incidence of adverse pregnancy outcomes was examined using multinomial logistic regression analysis with age and pre-pregnancy body mass index (BMI) as covariates...
2017: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/28249239/simultaneous-quantification-of-estrogens-their-precursors-and-conjugated-metabolites-in-human-breast-cancer-cells-by-lc-hrms-without-derivatization
#18
Stefan Poschner, Martin Zehl, Alexandra Maier-Salamon, Walter Jäger
Liquid chromatography-mass spectrometry (LC-MS) is the state of the art technique for quantification of steroid hormones. Currently used methods are typically limited by the need of pre-column derivatization to increase ionization efficiency; however, this causes hydrolysis of conjugated metabolites. Our newly established LC-HRMS method is able to simultaneously quantify conjugated and unconjugated steroids without prior derivatization using deuterated internal standards and solid-phase extraction. This assay was validated according to ICH Q2(R1) guidelines for the analysis of the 10 main steroids of the estrogenic pathway, namely 4-androstene-3,17-dione, dehydroepiandrosterone (DHEA), DHEA-3-sulfate, estrone, 17β-estradiol, estriol (16α-OH-17β-estradiol), estrone-3-sulfate, 17β-estradiol-3-(β-d-glucuronide), 17β-estradiol-3-sulfate and testosterone...
February 22, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28247972/clinical-relevance-of-hypercoagulability-and-possible-hypofibrinolysis-associated-with-estrone-and-estriol
#19
Albe C Swanepoel, Priyaa Naidoo, Vance G Nielsen, Etheresia Pretorius
Estrone (E1 ) and Estriol (E3 ) are endogenous female hormones, present in increased concentrations during female specific physiological processes (menopause and pregnancy respectively) that are associated with increased venous thrombotic risk. These hormones are also used as hormone therapies that are also associated with increased thromboembolism risk. Viscoelastic analysis revealed no significant difference to clot formation after hormone addition, however morphological analysis showed that the addition of both E1 and E3 result in fibrin clots composed of thinner fibrin fibers arranged in dense matted networks...
March 1, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/28224243/simultaneous-quantitation-of-endogenous-estrone-17%C3%AE-estradiol-and-estriol-in-human-serum-by-isotope-dilution-liquid-chromatography-tandem-mass-spectrometry-for-clinical-laboratory-applications
#20
Qiaoxuan Zhang, Liqiao Han, Jianbing Wang, Haibiao Lin, Peifeng Ke, Junhua Zhuang, Xianzhang Huang
Estrogen measurements are important in the assessment of female reproductive function and have expanding roles in other fields. A simple, accurate, highly sensitive and specific isotope-dilution liquid chromatography-tandem mass spectrometry method was developed and evaluated to simultaneously measure three endogenous estrogens in serum: estrone (E1), 17β-estradiol (E2), and estriol (E3). Chromatographic separation was achieved on a C18 column before electrospray ionization triple-quadrupole mass spectrometry in multiple reaction monitoring mode...
February 21, 2017: Analytical and Bioanalytical Chemistry
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