keyword
MENU ▼
Read by QxMD icon Read
search

Estriol

keyword
https://www.readbyqxmd.com/read/29783136/occurrence-and-estrogenic-activity-of-steroid-hormones-in-chinese-streams-a-nationwide-study-based-on-a-combination-of-chemical-and-biological-tools
#1
Bo Yao, Rui Li, Shuwen Yan, Shen-An Chan, Weihua Song
Steroid hormones (SHs) are continuously released into the aquatic environment through various pathways after being excreted by humans and animals, interfere with the normal function of the endocrine system and may affect the physiology and reproduction of exposed aquatic life. To conduct a nationwide investigation of the occurrence and biological effects of SHs in surface river/steam water in China, we quantitated 27 selected SHs in 217 surface water samples by solid-phase extraction (SPE) tandem LC-MS/MS and used a recombinant yeast estrogen assay to screen extracts of the water samples for estrogenic activities...
May 18, 2018: Environment International
https://www.readbyqxmd.com/read/29783106/prediction-of-the-combined-effects-of-multiple-estrogenic-chemicals-on-mcf-7-human-breast-cancer-cells-and-a-preliminary-molecular-exploration-of-the-estrogenic-proliferative-effects-and-related-gene-expression
#2
Shengwu Yuan, Chao Huang, Xiaoya Ji, Mei Ma, Kaifeng Rao, Zijian Wang
The environmental risks of environmental estrogens (EEs) are often assessed via the same mode of action in the concentration addition (CA) model, neglecting the complex combined mechanisms at the genetic level. In this study, the cell proliferation effects of estrone, 17α-ethinylestradiol, 17β-estradiol, estriol, diethylstilbestrol, estradiol valerate, bisphenol A, 4-tert-octylphenol and 4-nonylphenol were determined individually using the CCK-8 method, and the proliferation effects of a multicomponent mixture of estrogenic chemicals mixed at equipotent concentrations using a fixed-ratio design were studied using estrogen-sensitive MCF-7 cells...
May 18, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29776996/effects-of-chronic-exposure-to-12%C3%A2-saltwater-on-the-endocrine-physiology-of-juvenile-american-alligator-alligator-mississippiensis
#3
P C Faulkner, M L Burleson, L Simonitis, C Marshall, D Hala, L H Petersen
American alligator ( Alligator mississippiensis , Linnaeus) habitats are prone to saltwater intrusion following major storms, hurricanes or droughts. Anthropogenic impacts affecting hydrology of freshwater systems may exacerbate saltwater intrusion into freshwater habitats. The endocrine system of alligators is susceptible to changes in the environment but it is currently not known how the crocodilian physiological system responds to environmental stressors such as salinity. Juvenile alligators were exposed to 12‰ saltwater for 5 weeks to determine effects of chronic exposure to saline environments...
May 18, 2018: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29769477/enzyme-immunoassays-for-water-soluble-steroid-metabolites-in-the-urine-and-feces-of-japanese-macaques-macaca-fuscata-using-a-simple-elution-method
#4
Keiko Shimizu, Keiko Mouri
A simple, non-alcoholic extraction method for measuring estrogen and progesterone metabolites in excreta using enzyme immunoassays (EIAs) was developed in Japanese macaques. The obtained detection limits of EIAs using estrone conjugates (E1 C), pregnanediol glucuronide (PdG), and estriol glucuronide (E3 G) polyclonal antibodies with cross-reactivity to urinary and fecal steroid metabolites were 6.6 pg/ml, 2.1 ng/ml, and 0.35 ng/ml, respectively. These assays allowed the determination of E1 C, PdG, and E3 G from the excreta with good reproducibility and accuracy...
May 17, 2018: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/29754605/development-and-application-of-vortex-assisted-membrane-extraction-based-on-metal-organic-framework-mixed-matrix-membrane-for-the-analysis-of-estrogens-in-human-urine
#5
Guihua Gao, Shuo Li, Sijia Li, Liang Zhao, Ting Wang, Xiaohong Hou
A vortex-assisted membrane extraction (VA-ME) method based on several metal-organic framework mixed-matrix membranes (MOF-MMMs) was firstly developed and applied for the analysis of four estrogens in human urine. The MOF-MMMs, with high MOF loading (∼67 wt%), were prepared using a facile approach by embedding the MOFs in a polyvinylidene difluoride matrix. The method was suitable for a wide variety of MOF materials, and the incorporated MOFs retained their unique properties. Being model analytes, the estrogens became adsorbed on the MOFs in the vortex-stirred sample solutions and were subsequently desorbed in methanol and analyzed using high-performance liquid chromatography with fluorescence detection...
September 6, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29753456/quaternary-ammonium-functionalized-mcm-48-mesoporous-silica-as-a-sorbent-for-the-dispersive-solid-phase-extraction-of-endocrine-disrupting-compounds-in-water
#6
Shijuan Zhang, Fengli Lu, Xiaoyun Ma, Mingbo Yue, Yanxin Li, Jiammin Liu, Jinmao You
MCM-48 mesoporous silica was functionalized with dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride, a quaternary ammonium salt with a long hydrophobic chain, to prepare a new sorbent for the dispersive solid-phase extraction (DSPE) of seven endocrine disrupting compounds (EDCs) including 4-hexylphenol, 4-octylphenol, 4-nonylphenol, bisphenol A, estrone, 17β-estradiol and estriol in water. A series of differently functionalized MCM-48 materials were also synthesized, and they served as reference materials to study the mechanism...
May 7, 2018: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29729691/in-silico-estrogen-like-activity-and-in-vivo-osteoclastogenesis-inhibitory-effect-of-cicer-arietinum-extract
#7
Amany A Sayed, Abdo A Elfiky
Postmenopausal osteoporosis is a common disorder accompanied with estrogen deficiency in women. Plants containing phytoestrogens and amino acids have been used in the osteoporosis treatment. The present study aims to evaluate the estrogen-like activity of the Cicer arietinum extract (CAE) and its ability to inhibit osteoclastogenesis process. These achieved by investigating the binding of its active phytoestrogens (genistein, daidzein, formononetin and biochanin A) to the estrogen receptors (ER) α and β of rats and human in silico...
April 30, 2018: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/29709864/identification-contribution-and-estrogenic-activity-of-potential-edcs-in-a-river-receiving-concentrated-livestock-effluent-in-southern-taiwan
#8
Yung-Yu Liu, Yi-Siou Lin, Chia-Hung Yen, Chang-Ling Miaw, Ting-Chien Chen, Meng-Chun Wu, Chi-Ying Hsieh
We assessed 22 selected endocrine-disrupting compounds (EDCs) and other emerging, potentially endocrine-active compounds with estrogenic activity from the waters of the Wuluo River, southern Taiwan. This watershed receives high amounts of livestock and untreated household wastewaters. The river is surrounded by concentrated animal feedlot operations (CAFOs). River water samples were analyzed for selected compounds by liquid chromatography-tandem mass spectrometry (LC-MS/MS), T47D-KBluc reporter gene assay, and E-screen cell proliferation in vitro bioassay...
April 27, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29699871/countercurrent-separation-assisted-identification-of-two-mammalian-steroid-hormones-in-vitex-negundo
#9
Qingfei Fan, Yang Liu, Daniel Kulakowski, Shaonong Chen, J Brent Friesen, Guido F Pauli, Qishi Song
Countercurrent separation (CCS) has been widely used for the separation of high abundance compounds. However, the identification of low abundance compounds, such as mammalian steroid hormones, from natural sources is still a challenging task. A mixture of 14 human steroid hormone reference compounds was prepared for the development of a CCS enrichment strategy. The TLC-based GUESS (Generally Useful Estimate of Solvent Systems) method along with partitioning experiments were implemented to develop a process for the enrichment of these low abundance compounds with CCS...
April 21, 2018: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29680034/colloidal-gold-based-immunochromatographic-strip-assay-for-the-rapid-detection-of-three-natural-estrogens-in-milk
#10
Zhongxing Wang, Lingling Guo, Liqiang Liu, Hua Kuang, Chuanlai Xu
In this study, we developed highly sensitive and specific monoclonal antibodies (mAbs) against estrone (E1 ), 17β-estradiol (17β-E2 ), and estriol (E3 ). The half-maximal inhibitory concentration values of anti-E1 , anti-17β-E2 , and anti-E3 mAbs were 0.46, 0.36, and 0.39 ng/mL, respectively, based on competitive enzyme-linked immunosorbent assay (ic-ELISA) results. A rapid colloidal gold-based immunoassay strip assay was developed for the determination of E1, 17β-E2 , and E3 residues in milk samples...
September 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29660718/seasonal-variations-of-steroid-hormones-released-by-wastewater-treatment-plants-to-river-water-and-sediments-distribution-between-particulate-and-dissolved-phases
#11
Hadis Yarahmadi, Sung Vo Duy, Mounia Hachad, Sarah Dorner, Sébastien Sauvé, Michèle Prévost
Extensive environmental monitoring was conducted in an urban river impacted by multiple combined sewer overflows (CSOs) and wastewater treatment plant (WWTP) discharge points. Temporal and spatial distributions of dissolved and particulate steroids (progesterone (Prog), testosterone (Testo), medroxyprogesterone (MDRXY-Prog), levonorgestrel (Levo), norethindrone (Nore), estrone (E1), estradiol (E2), estriol (E3), and 17α-ethinylestradiol (EE2)) were investigated in sewage, WWTP effluents, receiving river water and sediments, and in drinking water plant (DWP) intakes...
April 13, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29628218/effects-of-sex-hormones-and-age-on-brain-volume-in-post-menopausal-women
#12
Gwang-Won Kim, Kwangsung Park, Gwang-Woo Jeong
BACKGROUND: Investigation of the effect of sex hormones on the brain volume in women provides a unique opportunity to examine menopause-related morphometric alterations. AIM: To evaluate brain morphological alterations in post-menopausal women using voxel-based morphometry and its correlations with sex hormone levels. METHODS: 20 Pre-menopausal women and 20 post-menopausal women underwent structural MRI. OUTCOMES: T1-weighted magnetic resonance data were acquired and serum sex hormones including total estrogen, estriol, estradiol (E2), follicle-stimulating hormone, free testosterone, SHBG, and luteinizing hormone were measured...
April 5, 2018: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/29595169/changes-in-estrogenicity-and-micropollutant-concentrations-across-unit-processes-in-a-biological-wastewater-treatment-system
#13
Jian Lin Chen, Shanthinie Ravindran, Simon Swift, Naresh Singhal
The behavior of 10 micropollutants, i.e. four estrogens (estrone, 17β-estradiol, estriol, 17α-ethynylestradiol), carbamazepine (CBZ), sulfamethoxazole (SMX), triclosan, oxybenzone, 4-nonylphenol, and bisphenol A, was investigated in a typical domestic wastewater treatment plant. LC-MS and yeast estrogen screen bioassay were used to study the changes in micropollutants and estrogenicity across unit processes in the treatment system. Primary treatment via sedimentation showed that only 4-nonylphenol was removed, but led to no significant change in estrogenicity...
March 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29573629/oxidation-of-steroid-estrogens-by-peroxymonosulfate-pms-and-effect-of-bromide-and-chloride-ions-kinetics-products-and-modeling
#14
Yang Zhou, Jin Jiang, Yuan Gao, Su-Yan Pang, Jun Ma, Jiebin Duan, Qin Guo, Juan Li, Yue Yang
Recently, in situ chemical oxidation (ISCO) using peroxymonosulfate (PMS) for environmental decontamination has received increasing interest. In this study, oxidation kinetics and products of four steroid estrogens (i.e., estrone, 17β-estradiol, estriol, and 17α-ethinylestradiol) by PMS under various conditions were investigated. PMS could fairly degrade steroid estrogens over the pH range of 7-10, and the degradation rate increased with the increase of solution pH. This pH-dependence was well described by parallel reactions between individual acid-base species of steroid estrogens (E and E- ) and PMS (HSO5 - and SO5 2- ), where specific second-order rate constants for E- with HSO5 - and SO5 2- were in the range of 2...
March 16, 2018: Water Research
https://www.readbyqxmd.com/read/29548854/comparative-estrogenicity-of-endogenous-environmental-and-dietary-estrogens-in-pregnant-women-i-serum-levels-variability-and-the-basis-for-urinary-biomonitoring-of-serum-estrogenicity
#15
Stefanie C Fleck, Nathan C Twaddle, Mona I Churchwell, Daniel R Doerge, Paritosh Pande, Justin G Teeguarden
Biomonitoring of human exposure to estrogens most frequently focuses on environmental and dietary estrogens, and infrequently includes measures of exposure to potent endogenous estrogens present in serum. Pregnancy is a developmentally sensitive period during which "added" serum estrogenicity exceeding normal intra-individual daily variability may be of particular relevance. We made repeated measurements of serum concentrations of estrone (E1), estradiol (E2), estriol (E3), estetrol (E4), daidzein (DDZ), genistein (GEN) and bisphenol A (BPA) in thirty pregnant women using ultra-performance liquid chromatography coupled with tandem mass spectrometry detection (UPLC-MS/MS) and electrospray ionization (ESI)...
May 2018: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29524823/phototransformation-of-estrogens-mediated-by-mn-iii-not-by-reactive-oxygen-species-in-the-presence-of-humic-acids
#16
Xinghao Wang, Jiayi Yao, Siyuan Wang, Xiaoxue Pan, Ruiyang Xiao, Qingguo Huang, Zunyao Wang, Ruijuan Qu
Photodegradation of pollutants is classically explained by reaction with reactive oxygen species. However Mn(III) may also remove pollutants, but direct evidence is actually lacking. Here we investigated the role of soluble Mn(III) on phototransformation of four typical estrogens, namely estrone (E1), 17β-estradiol (E2), estriol (E3), and 17α-ethynylestradiol (EE2), in the presence of Mn(II) and humic acid. Conversion rates of 60.2%, 89.0%, 87.6%, and 80.2% were achieved for E1, E2, E3, and EE2, respectively, after 72 h visible light irradiation...
June 2018: Chemosphere
https://www.readbyqxmd.com/read/29515057/reconsidering-the-roles-of-endogenous-estrogens-and-xenoestrogens-the-membrane-estradiol-receptor-g-protein-coupled-receptor-30-gpr30-mediates-the-effects-of-various-estrogens
#17
Hiroya Kadokawa, Kiran Pandey, Kereilwe Onalenna, Asrafun Nahar
Estrone (E1) and estriol (E3) are considered "weak" estrogens, which exert suppressive effects through estrogen receptors α and β. However, recent studies have demonstrated that E1 and E3, as well as estradiol (E2), suppress gonadotropin-releasing hormone-induced luteinizing hormone secretion from bovine gonadotrophs via G-protein-coupled receptor 30, which is expressed in various reproductive organs. Currently, there is a lack of fundamental knowledge regarding E1 and E3, including their blood levels...
March 6, 2018: Journal of Reproduction and Development
https://www.readbyqxmd.com/read/29480386/hypertrophic-osteoarthropathy-estrogens-prostaglandine-2-prostaglandin-a-2-and-the-inflammatory-reflex
#18
Ad Brouwers, Pieter G Dingjan, Ben Dujardin, Everardus J van Zoelen, Paul Lips, Louis J Gooren
It has been claimed that hyperestrogenism occurs in hypertrophic osteoarthropathy (HOA), but not in simple clubbing. However, one of our patients had simple clubbing and hyperestrogenism. We therefore measured estrogens, androgens, sex hormone-binding globulin (SHBG), and gonadotropins in five patients with HOA and in 18 patients with simple clubbing. Of the patients with HOA, 80% had a high urinary estriol concentration. In their serum, 80% had high estrone, 0% high estradiol, and 40% high SHBG. Of the patients with simple clubbing, 89% had a high urinary estriol concentration...
February 26, 2018: Clinical Rheumatology
https://www.readbyqxmd.com/read/29475970/neonatal-hormone-concentrations-and-risk-of-testicular-germ-cell-tumors-tgct
#19
Libby M Morimoto, David Zava, Katherine A McGlynn, Frank Z Stanczyk, Alice Y Kang, Xiaomei Ma, Joseph L Wiemels, Catherine Metayer
Background: Testicular germ cell tumor (TGCT) incidence has increased over the last 40 years in the United States. In contrast to TGCT among infants, it is hypothesized that TGCT in adolescents and young men is the result of sex steroid hormone imbalance during early fetal development. However, little is known about the neonatal period when abrupt hormonal changes occur, and direct supporting evidence is scarce due to the difficulties in obtaining prediagnostic specimens. Methods: We conducted a population-based case-control study examining hormone levels at birth among 91 infants (0-4 years) and 276 adolescents (15-19 years) diagnosed with TGCT, and 344 matched controls...
April 2018: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/29459491/steroid-sulfation-pathways-targeted-by-disulfates-determination-application-to-prenatal-diagnosis
#20
Oscar J Pozo, Josep Marcos, Olha Khymenets, Andy Pranata, Christopher Fitzgerald, Malcolm Donald McLeod, Cedric Shackleton
The steroid disulfates (aka bis-sulfates or bis(sulfates)) are a significant but minor fraction of the urinary steroid metabolome that have not been widely studied because major components are not hydrolyzed by the commercial sulfatases commonly used in steroid metabolomics. In early studies, conjugate fractionation followed by hydrolysis using acidified solvent (solvolysis) was used for the indirect detection of this fraction by GC-MS. This paper describes the application of a specific LC-MS/MS method for the direct identification of disulfates in urine, and their use as markers for the prenatal diagnosis of disorders causing reduced estriol production: STSD (Steroid Sulfatase Deficiency), SLOS (Smith-Lemli-Opitz Syndrome) and PORD (P450 Oxido-Reductase Deficiency)...
February 19, 2018: Journal of Molecular Endocrinology
keyword
keyword
15484
1
2
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"