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https://www.readbyqxmd.com/read/29131032/anti-psoriasis-effects-and-mechanisms-of-%C3%AE-8-quinolinoxy-zinc-phthalocyanine-mediated-photodynamic-therapy
#1
Han-Qing Liu, Ying-Ming Wang, Wan-Fang Li, Chao Li, Zhi-Huan Jiang, Jie Bao, Jin-Feng Wei, Hong-Tao Jin, Ai-Ping Wang
BACKGROUND/AIMS: The aim of this study was to determine the anti-psoriasis effects of α-(8-quinolinoxy) zinc phthalocyanine (ZnPc-F7)-mediated photodynamic therapy (PDT) and to reveal its mechanisms. METHODS: HaCaT cells were used to observe the influence of ZnPc-F7-PDT on cell proliferation in vitro. The in vivo anti-psoriasis effects of ZnPc-F7-PDT were evaluated using a mouse vagina model, a propranolol-induced cavy psoriasis model and an imiquimod (IMQ)-induced nude mouse psoriasis model...
November 9, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29126512/what-is-an-endocrine-disruptor
#2
Claude Monneret
Endocrine disrupting chemicals (EDCs) and potential EDCs are mostly man-made found in various materials. By interfering with the body's endocrine system, endocrine disruptors produce adverse developmental, reproductive, neurological, and immune effects in humans, abnormal growth patterns and neurodevelopmental delays in children. Thus, diethylstilbestrol (DES) a non-steroidal estrogen, which is regarded as a proof of concept, induces clear cell carcinoma among young women. EDCS may be found in plastic bottles and metal food cans (BPA), medical devices (phthalates), detergents, flame retardants (polybrominated diphenyl ethers), food (BPA), toys (phthalates), cosmetics and drugs (parabens), and pesticides (alkyl phenols such as nonylphenol)...
September 2017: Comptes Rendus Biologies
https://www.readbyqxmd.com/read/29124779/prenatal-diethylstilbestrol-exposure-and-cancer-risk-in-women
#3
Rebecca Troisi, Elizabeth E Hatch, Linda Titus, William Strohsnitter, Mitchell H Gail, Dezheng Huo, Ervin Adam, Stanley J Robboy, Marianne Hyer, Robert N Hoover, Julie R Palmer
In the Diethylstilbestrol [DES] Combined Cohort Follow-up, the age- and calendar-year specific standardized incidence ratio [SIR] for clear cell adenocarcinoma [CCA] was 27.6 (95% confidence interval [CI] 7.51-70.6) for the exposed women. The SIR for breast cancer was 1.17 (95% CI 1.01-1.36) and the hazard ratio [HR] adjusted for birth year and cohort for comparison with the unexposed was 1.05 (95% CI 0.79-1.41). The SIR for pancreatic cancer was 2.43 (95% CI 1.21-4.34) and the adjusted HR for comparison with unexposed women was 7...
November 10, 2017: Environmental and Molecular Mutagenesis
https://www.readbyqxmd.com/read/29112330/facile-and-versatile-strategy-to-prepare-magnetic-molecularly-imprinted-particles-based-on-the-coassembly-of-magnetic-nanoparticles-and-amphiphilic-random-copolymers
#4
Lili Zhu, Yuhua Cao, Xinjiong Ni, Aimei You, Guangqun Cao
Magnetic molecularly imprinted polymer nanoparticles for bisphenol A were prepared by coassembling magnetic nanoparticles and amphiphilic random copolymers. Under optimized conditions, bisphenol A as template molecules, magnetic molecularly imprinted polymer particles with regular morphology, small size, good monodispersity and high content of OA-Fe3 O4 were prepared by the coassembly method using P(MMA-co-MAA) with monomer ratio of 9:1. These magnetic molecularly imprinted polymer particles could be rapidly collected by an external magnet within 1 min...
November 7, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/29102757/response-of-xenografts-of-developing-human-female-reproductive-tracts-to-the-synthetic-estrogen-diethylstilbestrol
#5
Gerald R Cunha, Takeshi Kurita, Mei Cao, Joel Shen, Stanley J Robboy, Laurence Baskin
Human female fetal reproductive tracts 9.5-22 weeks of gestation were grown for 1 month in ovariectomized athymic adult female mouse hosts that were either untreated or treated continuously with diethylstilbestrol (DES) via subcutaneous pellet. Normal morphogenesis and normal patterns of differentiation marker expression (KRT6, KRT7, KRT8, KRT10, KRT14, KRT19, ESR1, PGR, TP63, RUNX1, ISL1, HOXA11 and α-ACT2) were observed in xenografts grown in untreated hosts and mimicked observations of previously reported (Cunha et al...
October 4, 2017: Differentiation; Research in Biological Diversity
https://www.readbyqxmd.com/read/29069384/a-prospective-cohort-study-of-prenatal-diethylstilbestrol-exposure-and-cardiovascular-disease-risk
#6
Rebecca Troisi, Linda Titus, Elizabeth E Hatch, Julie R Palmer, Dezheng Huo, William C Strohsnitter, Ervin Adam, Winnie Ricker, Marianne Hyer, Robert N Hoover
Purpose: Prenatal exposure to diethylstilbestrol (DES), a prototype endocrine disrupting chemical, is associated with risk of adverse reproductive outcomes and cancer in women. We investigated whether cardiovascular disease (CVD) risk might also be greater in prenatally DES exposed women. Methods: DES exposed (n=3941) and unexposed (n=1705) women participating in the Diethylstilbestrol Combined Cohort Follow-up Study were followed prospectively from 1994-2013. Prenatal DES exposure (or lack of exposure) was documented in the birth record or physician's note...
October 20, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29035768/uv-photoconversion-of-environmental-oestrogen-diethylstilbestrol-and-its-persistence-in-surface-water-under-sunlight
#7
Bi Xu, Kuixiao Li, Juan Qiao, Zhiqi Liungai, Chao Chen, Yun Lu
As one of the most oestrogenic synthetic compounds in water environment, diethylstilbestrol (DES) has been studied for decades. Some studies showed that DES can be removed by ultraviolet (UV) irradiation. However, no one has paid attention to the formation of oestrogenic disinfection by-products (DBPs) and the persistence of DES in surface water remains a mystery. In this study, UV was found to be very effective in removing oestrogenic activity regardless of water quality. Three oestrogenic DBPs were specifically isolated by oestrogen receptor-based affinity chromatography and identified as 9,10-diethylphenanthrene-3,6-diol, cis-DES and Z,Z-dienestrol...
October 3, 2017: Water Research
https://www.readbyqxmd.com/read/29031189/renal-subcapsular-xenografing-of-human-fetal-external-genital-tissue-a-new-model-for-investigating-urethral-development
#8
Dylan Isaacson, Joel Shen, Mei Cao, Adriane Sinclair, Xuan Yue, Gerald Cunha, Laurence Baskin
In this paper, we introduce our novel renal subcapsular xenograft model for the study of human penile urethral and clitoral development. We grafted fifteen intact fetal penes and clitorides 8-11 weeks fetal age under the renal capsules of gonadectomized athymic mice. The mice were treated with a subcutaneous pellet of dihydrotestosterone (DHT), diethylstilbestrol (DES) or untreated with hormones. Xenografts were harvested after fourteen days of growth and analyzed via serial histologic sectioning and immunostaining for Ki-67, cytokeratins 6, 7 and 10, uroplakin and the androgen receptor...
September 22, 2017: Differentiation; Research in Biological Diversity
https://www.readbyqxmd.com/read/29030156/applicability-of-an-innovative-steroid-profiling-method-to-determine-synthetic-growth-promoter-abuse-in-cattle
#9
M H Blokland, E F van Tricht, L A van Ginkel, S S Sterk
A robust LC-MS/MS method was developed to quantify a large number of phase I and phase II steroids in urine. The decision limit is for most compounds lower than 1ngml(-1) with a measurement uncertainty smaller than 30%. The method is fully validated and was applied to assess the influence of administered synthetic steroids and beta-agonists on the steroidogenesis. From three animal experiments, clenbuterol, diethylstilbestrol and stanozolol, the steroid profiles in urine of bovine animals were compared before and after treatment...
November 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28960386/diethylstilbestrol-impaired-oogenesis-of-yellow-catfish-juveniles-through-disrupting-hypothalamic-pituitary-gonadal-axis-and-germ-cell-development
#10
Yaqin Wang, Yingwen Li, Qiliang Chen, Zhihao Liu
Diethylstilbestrol (DES), a non-steroidal estrogen, has been found to cause altered germ cell development and disordered ovarian development in fish females. However, the mechanisms that might be involved are poorly understood. In this study, female juveniles of yellow catfish (Pelteobagrus fulvidraco) (120 days post-hatching) were exposed to two doses (10 and 100 ng l(-1) ) of DES for 28 days. After the endpoint of exposure, decreased ovary weight and gonadosomatic index, as well as various ovarian impairments were observed in response to DES...
September 28, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28927721/agonistic-effects-of-diverse-xenobiotics-on-the-constitutive-androstane-receptor-as-detected-in-a-recombinant-yeast-cell-assay
#11
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 18, 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
#12
Sílvia M Illamola, Christina Bucci-Rechtweg, Maged M Costantine, Ekaterini Tsilou, Catherine M Sherwin, Anne Zajicek
Pregnant and breastfeeding women have been rendered therapeutic orphans as they have been historically excluded from clinical trials. Labelling 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
#13
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, whereas 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
#14
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
#15
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
#16
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...
November 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28734970/genetic-variation-in-low-dose-effects-of-neonatal-des-exposure-in-female-rats
#17
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 20, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/28717700/prostate-cancer-burden-at-the-uganda-cancer-institute
#18
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
#19
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
#20
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
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