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diéthylstilbestrol

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https://www.readbyqxmd.com/read/28927721/agonistic-effects-of-diverse-xenobiotics-on-the-constitutive-androstane-receptor-as-detected-in-a-recombinant-yeast-cell-assay
#1
Ryo Kamata, Daisuke Nakajima, Fujio Shiraishi
The constitutive androstane receptor (CAR) is a nuclear receptor and transcription factor regulating proteins involved in xenobiotic metabolism. Agonist activation of the CAR can trigger metabolic activation and toxification as well as detoxification and clearance; accordingly, xenobiotic substances acting as CAR ligands may pose a threat to human and animal health. We used yeast cells transduced with the human CAR and the response pathway to measure the CAR-agonistic activities of 549 synthetic or natural compounds: 216 of the tested compounds exhibited CAR-agonistic effects...
September 16, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28925019/inclusion-of-pregnant-and-breastfeeding-women-in-research-efforts-and-initiatives
#2
Sílvia M Illamola, Christina Bucci-Rechtweg, Maged M Costantine, Katerina Tsilou, Catherine M Sherwin, Anne Zajicek
Pregnant and breastfeeding women have been rendered therapeutic orphans as they have been historically excluded from clinical trials. Labeling for most approved drugs does not provide information about safety and efficacy during pregnancy. This lack of data is mainly due to ethico-legal challenges that have remained entrenched in the post-diethylstilbestrol and thalidomide era, and that have led to pregnancy being viewed in the clinical trial setting primarily through a pharmacovigilance lens. Policy considerations that encourage and/or require the inclusion of pregnant or lactating women in clinical trials may address the current lack of available information...
September 19, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28836296/enzyme-assisted-metal-organic-framework-sensing-system-for-diethylstilbestrol-detection
#3
Wen-Juan Li, Lan Chang, Qiao Liu, Di Ning, Xi-Yuan Yao, Yue Li, Wen-Juan Ruan
As novel fluorescent sensing materials, metal-organic frameworks (MOFs) have shown great potential in environmental monitoring. However, most of the researches are limited to traditional pollutants, while the application of MOFs to the detection of the pollutants with more complicated structures, such as endocrine disrupting chemicals (EDCs), has rarely been explored. The difficulties faced in the sensing of EDCs include their electronic stability and the structural similarity among homologues, which could be overcome by the incorporation of enzymatic reaction...
August 23, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28827713/diethylstilbestrol-administration-inhibits-theca-cell-androgen-and-granulosa-cell-estrogen-production-in-immature-rat-ovary
#4
Yoshitaka Imamichi, Toshio Sekiguchi, Takeshi Kitano, Takashi Kajitani, Reiko Okada, Yoshihiko Inaoka, Kaoru Miyamoto, Junsuke Uwada, Satoru Takahashi, Takahiro Nemoto, Asuka Mano, Md Rafiqul Islam Khan, Md Tariqul Islam, Koh-Ichi Yuhki, Hitoshi Kashiwagi, Fumitaka Ushikubi, Nobuo Suzuki, Takanobu Taniguchi, Takashi Yazawa
Diethylstilbestrol (DES), a strong estrogenic compound, is well-known to affect the reproductive system. In this study, we investigated the effects of DES administration on gonadotropin levels and ovarian steroidogenesis in prepubertal rats. DES treatment acutely reduced serum LH levels, followed by a reduction in the expression of various steroidogenesis-related genes in theca cells. Serum FSH levels were almost unaffected by DES-treatment, even though Cyp19a1 expression was markedly reduced. Serum progesterone, testosterone and estradiol levels were also declined at this time...
August 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28760493/morphology-based-scoring-of-chromosomal-instability-and-its-correlation-with-cell-viability
#5
Shubhlata Yadav, Alka Bhatia
OBJECTIVE: The aim of this study was to devise the quantitative scoring system for Chromosomal instability (CIN) based on morphological indicators like MPM, NB, NPB, CS, La and MN in cancer cell line and to correlate it with cell viability and death. METHODS: Human hepatocellular carcinoma (HepG2) cells were treated with drugs like Diethylstilbestrol 0-100μM, Griseofulvin 0-40μg/ml, Vincristine sulphate 0-25μg/ml, Mitomycin C 0-600ng/ml, Bleomycin 0-10μg/ml, Doxorubicin 0-30μg/ml for 24h...
July 1, 2017: Pathology, Research and Practice
https://www.readbyqxmd.com/read/28737429/hif-1%C3%AE-inhibition-by-diethylstilbestrol-and-its-polyacetal-conjugate-in-hypoxic-prostate-tumour-cells-insights-from-nmr-metabolomics
#6
Ana Armiñán, Luís Mendes, Joana Carrola, Julie Movellan, María J Vicent, Iola F Duarte
In this study, we have employed (1)H NMR metabolomics to assess the metabolic responses of PC3 prostate tumour cells to hypoxia and to pharmacological HIF-1α inhibition by DES or its polyacetal conjugate tert-DES. Oxygen deprivation prompted a number of changes in intracellular composition and metabolic activity, mainly reflecting upregulated glycolysis, amino acid catabolism and other compensatory mechanisms used by hypoxic cells to deal with oxidative imbalance and energy deficit. Cell treatment with a non-cytotoxic concentration of DES, under hypoxia, triggered significant changes in 17 metabolites...
July 24, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28734970/genetic-variation-in-low-dose-effects-of-neonatal-des-exposure-in-female-rats
#7
Hideo Ohmukai, Tsukasa Negura, Shigehiro Tachibana, Ryo Ohta
To confirm genetic variation in low-dose effects of diethylstilbestrol (DES), two inbred strains of rats, which have been selectively bred for high- and low-avoidance learning (HAA and LAA, respectively), were used in this study. LAA rats characteristically show later sexual maturation, earlier reproductive senescence, and lower body weight as compared to HAA rats. Female neonates of each strain were daily administered DES by oral gavage at doses of 0 (vehicle only), 0.05 and 0.5μg/kg for the first 5days after birth...
July 19, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/28717700/prostate-cancer-burden-at-the-uganda-cancer-institute
#8
Fred Okuku, Jackson Orem, George Holoya, Chris De Boer, Cheryl L Thompson, Matthew M Cooney
PURPOSE: In Uganda, the incidence of prostate cancer is increasing at a rate of 5.2% annually. Data describing presentation and outcomes for patients with prostate cancer are lacking. METHODS: A retrospective review of medical records for men with histologically confirmed prostate cancer at the Uganda Cancer Institute (UCI) from January 1 to December 17, 2012, was performed. RESULTS: Our sample included 182 men whose mean age was 69.5 years (standard deviation, 9...
August 2016: Journal of Global Oncology
https://www.readbyqxmd.com/read/28704724/development-of-immunoaffinity-solid-phase-microextraction-rods-for-analysis-of-three-estrogens-in-environmental-water-samples
#9
Cuicui Wang, Linyan Yang, Na Li, Xinda Zhang, Yongze Guo, Cun Li
In this study, immunoaffinity solid phase microextraction (SPME) rods were developed for the analysis of diethylstilbestrol (DES), hexestrol (HES) and dienestrol (DIS) followed by ultra high-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). This immunoaffinity SPME device was built with three stainless steel rods bundled together as one and modified with porous silicate particles. As an extraction sorbent, antibody immobilization approach was employed based on the covalent attachment of the anti-diethylstilbestrol monoclonal antibody (mAb) onto the rods...
September 1, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28689666/incidence-rates-and-risks-of-diethylstilbestrol-related-clear-cell-adenocarcinoma-of-the-vagina-and-cervix-update-after-40-year-follow-up
#10
Dezheng Huo, Diane Anderson, Julie R Palmer, Arthur L Herbst
OBJECTIVE: Women exposed to diethylstilbestrol (DES) in utero are at increased risk for the development of vaginal and cervical clear cell adenocarcinoma (CCA) at younger age. It is unknown if a second peak will occur in later life, the ages when CCA developed spontaneously in the pre-DES era. The complete epidemiologic curve of CCA has not been reported, yet. METHODS: We reviewed 720 cases of CCA from the CCA registry at the University of Chicago through 2014. Incidence rates and cumulative risks for CCA were calculated based on white women born in the U...
September 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/28670059/management-of-pelvic-floor-disorder-in-a-diethylstilbestrol-daughter
#11
Christopher P Chung, Suzanne Cao, Grace Wakabayashi, Ernest S Han
Between 1947 and 1971, the synthetic estrogen diethylstilbestrol (DES) was prescribed to pregnant women to prevent spontaneous abortions. Many studies have demonstrated adverse consequences of prenatal DES exposure. This report describes a DES daughter treated for uterine cancer who presented with a foreshortened vagina of 4 cm and stage III pelvic organ prolapse. She underwent successful vaginal native tissue reconstructive surgery with uterosacral colpopexy and anterior and posterior repair to lengthen her vagina and treat her prolapse...
July 2017: Proceedings of the Baylor University Medical Center
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
#12
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/28549265/facile-screening-of-potential-xenoestrogens-by-an-estrogen-receptor-based-reusable-optical-biosensor
#13
Lanhua Liu, Xiaohong Zhou, Yun Lu, Didi Shan, Bi Xu, Miao He, Hanchang Shi, Yi Qian
The apparent increase in hormone-induced cancers and disorders of the reproductive tract has led to a growing demand for new technologies capable of screening xenoestrogens. We reported an estrogen receptor (ER)-based reusable fiber biosensor for facile screening estrogenic compounds in environment. The bioassay is based on the competition of xenoestrogens with 17β-estradiol (E2) for binding to the recombinant receptor of human estrogen receptor α (hERα) protein, leaving E2 free to bind to fluorophore-labeled anti-E2 monoclonal antibody...
May 18, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28533019/the-in-vitro-effect-of-nonylphenol-propranolol-and-diethylstilbestrol-on-quality-parameters-and-oxidative-stress-in-sterlet-acipenser-ruthenus-spermatozoa
#14
Olena Shaliutina, Anna Shaliutina-Kolešová, Ievgen Lebeda, Marek Rodina, Ievgeniia Gazo
The sturgeon is a highly endangered fish mostly due to over-fishing, habitat destruction, and water pollution. Nonylphenol (NP), propranolol (PN), and diethylstilbestrol (DES) are multifunctional xenobiotic compounds used in a variety of commercial and industrial products. The mechanism by which these xenobiotic compounds interfere with fish reproduction is not fully elucidated. This study assessed the effect of NP, PN, and DES on motility parameters, membrane integrity, and oxidative/antioxidant status in sterlet Acispenser ruthenus spermatozoa...
May 19, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28498261/clear-cell-carcinoma-of-the-uterine-cervix-a-clinical-and-pathological-analysis-of-47-patients-without-intrauterine-diethylstilbestrol-exposure
#15
Li Yang, Aiwen Zheng, Xiang Zhang, Xianhua Fang, Wenyong Sun, Yaqing Chen
OBJECTIVES: The aim of this study was to summarize the clinical and pathological characteristics and to conduct prognosis analysis of patients who were diagnosed with clear cell carcinoma of the uterine cervix (CCCUC) and without a history of exposure to diethylstilbestrol. METHODS: We performed a retrospective review of all the patients with CCCUC who were diagnosed and treated at Zhejiang Cancer Hospital between 1998 and 2014. Charts were reviewed for clinical and pathological characteristics, and prognosis analysis was conducted...
June 2017: International Journal of Gynecological Cancer
https://www.readbyqxmd.com/read/28479892/chemical-constituents-of-cyperus-rotundus-l-and-their-inhibitory-effects-on-uterine-fibroids
#16
Ju Ying, Xiao Bing
BACKGROUND: Xiang Fu (Cyperus rotundus L) enters the liver, spleen and triple warmer meridians, and has qi stagnation-removing, qi circulation-promoting, menstruation-regulating and pain-relieving effects. Besides, it can improve ovarian function, and has hypolipidemic, hypoglycemic and neuroprotective actions. OBJECTIVES: To study the biflavone constituents in Cyperus rotundus L and to investigate the effect and mechanism of amentoflavone on inhibition of uterine tumors...
December 2016: African Health Sciences
https://www.readbyqxmd.com/read/28461243/current-perspective-of-diethylstilbestrol-des-exposure-in-mothers-and-offspring
#17
REVIEW
Taher Al Jishi, Consolato Sergi
Diethylstilbestrol (DES) was an orally active estrogen prescribed to the pregnant women to prevent miscarriages. DES is known as a 'biological time bomb' and long-term effects of DES have been recorded in the mothers exposed to DES and their offspring (DES-daughters and DES-sons). Adverse pregnancy outcomes, infertility, cancer, and early menopause have been discovered in women exposed to DES, and some events occur in their offspring and subsequent generations. An increased risk of breast cancer is not limited to the DES-exposed daughters...
April 28, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/28422034/endocrine-disruptors-and-prostate-cancer
#18
Eduardo Sanchez de Badajoz, José Maria Lage-Sánchez, Pilar Sánchez-Gallegos
OBJECTIVES: Although prostate cancer is probably the most frequent cancer in men, little is known about its etiology. Clear evidence exists about variations in the incidence of prostate cancer between populations living in different countries. These variations could be explained by differences in lifestyle and a possible association with a set of substances that are able to intervene in the origin of the disease. METHODS: The reason that lifestyle may be the cause of prostate cancer is related to endocrine disruptors...
April 2017: Archivos Españoles de Urología
https://www.readbyqxmd.com/read/28406917/methylomic-changes-in-individuals-with-psychosis-prenatally-exposed-to-endocrine-disrupting-compounds-lessons-from-diethylstilbestrol
#19
COMPARATIVE STUDY
Fabrice Rivollier, Boris Chaumette, Narjes Bendjemaa, Mélanie Chayet, Bruno Millet, Nematollah Jaafari, Amina Barhdadi, Louis-Philippe Lemieux Perreault, Sylvie Provost, Marie-Pierre Dubé, Raphaël Gaillard, Marie-Odile Krebs, Oussama Kebir
BACKGROUND: In the Western world, between 1940 and 1970, more than 2 million people were exposed in utero to diethylstilbestrol (DES). In exposed individuals, and in their descendants, adverse outcomes have been linked to such exposure, including cancers, genital malformations, and less consistently, psychiatric disorders. We aimed to explore whether prenatal DES exposure would be associated with DNA methylation changes, and whether these epigenetic modifications would be associated with increased risk of psychosis...
2017: PloS One
https://www.readbyqxmd.com/read/28393521/highly-sensitive-detection-of-bisphenol-a-by-nanoaptamer-assay-with-truncated-aptamer
#20
Eun-Hee Lee, Hyun Jeong Lim, Sang-Don Lee, Ahjeong Son
For the sensitive quantification of bisphenol A (BPA), we have developed NanoAptamer assay, which employs aptamer and complementary signaling DNA, a set of quantum dots (QD), and magnetic beads (MBs). Signaling DNA-QD655 was tethered to MB-QD565 via the aptamer. The affinity of the aptamer to BPA resulted in the release of the signaling DNA-QD655 from the complex and hence the corresponding decrease in the QD655 fluorescence measurement signal. Three new aptamers (23, 58, and 24-mer) were designed via truncation of the reference aptamer (73-mer)...
April 20, 2017: ACS Applied Materials & Interfaces
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