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https://www.readbyqxmd.com/read/28646728/evaluation-of-the-impact-of-vasa-previa-on-feto-placental-hormonal-synthesis-and-fetal-growth
#1
Yaakov Melcer, Ron Maymon, Marina Pekar-Zlotin, Orna Levinsohn-Tavor, Josef Tovbin, Eric Jauniaux
INTRODUCTION: A vasa previa (VP) refers to aberrant chorionic vessels which can either connect the chorionic plate to a velamentous cord (type I) or a succenturiate or accessory lobe to the main placental mass (type II). METHODS: We performed retrospective cohort study of 32 singleton pregnancies diagnosed with VP. The levels of maternal serum alpha-fetoprotein (AFP), human chorionic gonadotropin (hCG) and unconjugated estriol (uE3) were measured at 15-18 weeks as part of the triple test screening for Trisomy 21...
June 16, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28622049/the-efficacy-and-safety-of-estriol-to-treat-vulvovaginal-atrophy-in-postmenopausal-women-a-systematic-literature-review
#2
C Rueda, A M Osorio, A C Avellaneda, C E Pinzón, O I Restrepo
OBJECTIVES: To evaluate the efficacy and safety of estriol for the treatment of vulvovaginal atrophy in postmenopausal women. METHODS: A systematic literature review was performed. We searched the following electronic databases: Medline, Cochrane, Embase, Lilacs, CINHAL and Google Scholar. The studies selected included controlled clinical trials and quasi-experimental studies. Selections were made in pairs and independently, first by title and abstract and then complete texts...
June 16, 2017: Climacteric: the Journal of the International Menopause Society
https://www.readbyqxmd.com/read/28573324/development-of-a-sensitive-and-robust-online-dual-column-liquid-chromatography-tandem-mass-spectrometry-method-for-the-analysis-of-natural-and-synthetic-estrogens-and-their-conjugates-in-river-water-and-wastewater
#3
Mira Čelić, Sara Insa, Biljana Škrbić, Mira Petrović
An online ultra-high-performance-liquid chromatography-triple quadrupole tandem mass spectrometry (UHPLC-MS/MS) method for detection and quantification of natural and synthetic estrogens and their conjugates in aqueous matrices was developed. Target compounds include the natural estrogen estradiol (E2) and its main metabolites estrone (E1) and estriol (E3), the synthetic estrogens ethinylestradiol (EE2) and diethylstilbestrol (DES) and their conjugates estrone 3-sulfate (E1-3S), estriol 3-sulfate (E3-3S), estradiol 17-glucuronide (E2-17G), estrone 3-glucuronide (E1-3G), and estriol 16-glucuronide (E3-16G)...
June 2, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28567681/study-on-the-removal-of-hormones-from-domestic-wastewaters-with-lab-scale-constructed-wetlands-with-different-substrates-and-flow-directions
#4
José Alberto Herrera-Melián, Rayco Guedes-Alonso, Alejandro Borreguero-Fabelo, José Juan Santana-Rodríguez, Zoraida Sosa-Ferrera
Eight wastewater samples from a university campus were analysed between May and July of 2014 to determine the concentration of 14 natural and synthetic steroid hormones. An on-line solid-phase extraction combined with ultra-high performance liquid chromatography coupled with mass spectrometry (on-line SPE-UHPLC-MS/MS) was used as extraction, pre-concentration and detection method. In the samples studied, three oestrogens (17β-estradiol, estrone and estriol), two androgens (boldenone and testosterone), three progestogens (norgestrel, progesterone and norethisterone) and one glucocorticoid (prednisone) were detected...
May 31, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28552915/the-regioselective-glucuronidation-of-morphine-by-dimerized-human-ugt2b7-1a1-1a9-and-their-allelic-variants
#5
Zi-Zhao Yang, Li Li, Lu Wang, Ling-Min Yuan, Ming-Cheng Xu, Jing-Kai Gu, Hui-di Jiang, Lu-Shan Yu, Su Zeng
Uridine diphosphate-glucuronosyltransferase (UGT) 2B7 is expressed mostly in the human liver, lung and kidney and can transfer endogenous glucuronide group into its substrate and impact the pharmacological effects of several drugs such as estriol, AZT and morphine. UGT2B7 and its allelic variants can dimerize with the homologous enzymes UGT1A1 and UGT1A9, as well as their allelic variants, and then change their enzymatic activities in the process of substrate catalysis. The current study was designed to identify this mechanism using morphine as the substrate of UGT2B7...
May 29, 2017: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/28521190/simultaneous-determination-of-bisphenol-a-and-estrogens-in-hair-samples-by-liquid-chromatography-electrospray-tandem-mass-spectrometry
#6
Chaelin Lee, Chong Hyeak Kim, Sunghwan Kim, Sung-Hee Cho
Bisphenol A (BPA), an endocrine disrupter, is widely used to make chemicals for polycarbonate, plastics, beverage containers, epoxy resins, and cash register receipts. BPA is one of the known xenoestrogens, which have weak estrogenic activity and cause obesity, diabetes, breast cancer, and reproductive disorders. Even though the concentration level of metabolomes in hair is usually lower than that in urine and blood, there are several reasons why we chose to use hair samples. First, the sampling procedure of hairs is simple...
May 11, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28509626/custom-compounded-bioidentical-hormone-therapy-why-so-popular-despite-potential-harm-the-case-against-routine-use
#7
M L'Hermite
Wide rejection of conventional hormone therapy (HT) after the initial publication of the Women's Health Initiative (WHI) led to unjustified use of custom-compounded bioidentical hormones. In the USA, it became an unregulated drug manufacturer industry in disguise, without proper control and making false claims and misleading advertisements. Manufacturing quality is not ensured. Unspecific harm from compounding has occurred on a large scale, such as deaths from infected products and end-stage renal failure plus carcinoma due to confusion between different Chinese herbs...
June 2017: Climacteric: the Journal of the International Menopause Society
https://www.readbyqxmd.com/read/28502780/biodegradation-of-endocrine-disruptors-in-urban-wastewater-using-pleurotus-ostreatus-bioreactor
#8
Zdena Křesinová, Lucie Linhartová, Alena Filipová, Martin Ezechiáš, Pavel Mašín, Tomáš Cajthaml
The white rot fungus Pleurotus ostreatus HK 35, which is also an edible industrial mushroom commonly cultivated in farms, was tested in the degradation of typical representatives of endocrine disrupters (EDCs; bisphenol A, estrone, 17β-estradiol, estriol, 17α-ethinylestradiol, triclosan and 4-n-nonylphenol); its degradation efficiency under model laboratory conditions was greater than 90% within 12 days and better than that of another published strain P. ostreatus 3004. A spent mushroom substrate from a local farm was tested for its applicability in various batch and trickle-bed reactors in degrading EDCs in model fortified and real communal wastewater...
May 11, 2017: New Biotechnology
https://www.readbyqxmd.com/read/28485925/occurrence-and-ecotoxicological-effects-of-free-conjugated-and-halogenated-steroids-including-17%C3%AE-hydroxypregnanolone-and-pregnanediol-in-swiss-wastewater-and-surface-water
#9
Kun Zhang, Yanbin Zhao, Karl Fent
Apart from estrogens, the occurrence and ecotoxicity of steroids in aquatic environments is poorly known. Here, we analyzed 33 steroids, including estrogens, androgens, progestins, and glucocorticoids, in hospital wastewaters, river water, and municipal wastewater treatment plant (WTP) influents and effluents at different sites in Switzerland. In addition, wastewater from different treatment steps of two WTPs with advanced treatment, such as ozonation or pulverized activated carbon, were analyzed to study the steroid's behavior during treatment...
June 6, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28456451/high-sensitivity-determination-of-estrogens-in-fish-plasma-using-chemical-derivatization-upstream-uhplc-msms
#10
Ugo Bussy, Yu-Wen Chung-Davidson, Tyler J Buchinger, Ke Li, Weiming Li
This article describes the development and validation of a sensitive LC-MSMS method for determination of estrogen in fish plasma. Dansyl chloride derivatization of the phenol functional group in estrogen was used to enhance the response to atmospheric pressure ionization leading to improve the sensitivity. Individual (13)C internal standards were selected after comparison with deuterated standards. Liquid-liquid extraction (ethyl acetate or methyl tert-butyl ether) and protein precipitation (acetonitrile, methanol or acetone) were compared for the extraction and clean-up of estrogens from fish plasma...
April 27, 2017: Steroids
https://www.readbyqxmd.com/read/28454423/the-nutritional-herb-epimedium-grandiflorum-inhibits-the-growth-in-a-model-for-the-luminal-a-molecular-subtype-of-breast-cancer
#11
Nitin T Telang, Gou Li, Meena Katdare, Daniel W Sepkovic, H Leon Bradlow, George Y C Wong
The Luminal A subtype of breast cancer expresses the estrogen receptor (ER)-α and progesterone receptor (PR), but not the human epidermal growth factor receptor (HER)-2 oncogene. This subtype of breast cancer responds to endocrine therapy involving the use of selective estrogen receptor modulators and/or inhibitors of estrogen biosynthesis. However, these therapeutic agents are frequently associated with long-term systemic toxicity and acquired tumor resistance, emphasizing the need to identify non-toxic alternative treatments for chemo-endocrine therapy responsive breast cancer...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28429258/hormonal-regulation-of-nk-cell-cytotoxic-activity
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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...
May 5, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28359553/planar-yeast-estrogen-screen-with-resorufin-%C3%AE-d-galactopyranoside-as-substrate
#19
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...
May 12, 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
#20
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
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