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Reproductive Toxicology

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https://www.readbyqxmd.com/read/28087314/a-protective-role-of-cumulus-cells-after-short-term-exposure-of-rat-cumulus-cell-oocyte-complexes-to-lifestyle-or-environmental-contaminants
#1
Kelly A Campen, Kenneth P McNatty, Janet L Pitman
Ovarian follicular fluid provides a potential reservoir for exogenous compounds that may adversely affect oocyte quality. This study examined the effects of common lifestyle and environmental contaminants, namely bisphenol-A (BPA), caffeine, 3,4-methylenedioxymethamphetamine (MDMA), nicotine and Δ(9)-tetrahydrocannabinol on gap junction genes (Gja1, Gja4) and proteins (GJA1), glucose metabolism genes (Gfpt1, Pfkp) and oocyte growth factor genes (Bmp15, Gdf9), as well as gap junction transfer rate, in rat cumulus-oocyte complexes (COCs)...
January 10, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/28077272/evaluation-of-sodium-arsenite-exposure-on-reproductive-competence-in-pregnant-and-postlactational-dams-and-their-offspring
#2
Nadia Soledad Bourguignon, María Marta Bonaventura, Diego Rodríguez, Marianne Bizzozzero, Clara Ventura, Mariel Nuñez, Victoria Adela Lux-Lantos, Carlos Libertun
We investigated arsenite exposure on the reproductive axis of dams (during pregnancy and at cyclicity resumption) and their offspring. Pregnant rats were exposed to 5 (A5) or 50ppm (A50) of sodium arsenite in drinking water from gestational day 1 (GD1) until sacrifice at GD18 or two months postpartum. Offspring were exposed to the same treatment as their mothers from weaning to adulthood. A50-pregnant rats gained less weight, showed increased testosterone and estradiol but pregnancy was unaffected. After lactation, arsenic-exposed dams presented compromised cyclicity, decreased estradiol, increased follicle-stimulating hormone (FSH), less preovulatory follicles and presence of ovarian cysts, suggesting impaired reproduction...
January 7, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/28077271/occupational-exposure-to-pesticides-reproductive-hormone-levels-and-sperm-quality-in-young-brazilian-men
#3
Cleber Cremonese, Camila Piccoli, Fabio Pasqualotto, Ruth Clapauch, Rosalina Jorge Koifman, Sergio Koifman, Carmen Freire
The association of occupational exposure to current-use pesticides with reproductive hormones, semen quality, and genital measures was investigated among young men in the South of Brazil. A cross-sectional study was conducted in 99 rural and 36 urban men aged 18-23 years. Information on pesticide use was obtained through questionnaire. Serum and semen samples were analyzed for sex hormones and sperm parameters, respectively, and measurement of anogenital distance (AGD) and testis volume (TV) were performed...
January 7, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/28043866/investigation-into-the-effect-of-microsampling-on-mouse-fetuses-and-pregnant-mice-in-the-embryofetal-development-study-design
#4
Terri Mitchard, Sarah Kirk, Claire Grant, Jane Stewart
The effects on fetal weights and maternal health of taking 32μL blood microsamples at the end of organogenesis in a mouse embryofetal development (EFD) study design was investigated with the aim of reducing satellite animal usage. The effects of warming, handling and sampling either 3 or 6 times on gestation day 16 was evaluated. Maternal body weight gain was transiently reduced when animals underwent warming and handling with or without microsampling. Fetal weights on gestation day 18 were reduced after 6 occasion warming and handling alone or taking samples, but not when sampling was limited to 3 timepoints...
December 30, 2016: Reproductive Toxicology
https://www.readbyqxmd.com/read/28011299/apoptosis-inducing-factor-gene-depletion-inhibits-zearalenone-induced-cell-death-in-a-goat-leydig-cell-line
#5
Diqi Yang, Tingting Jiang, Pengfei Lin, Huatao Chen, Lei Wang, Nan Wang, Fan Zhao, Keqiong Tang, Dong Zhou, Aihua Wang, Yaping Jin
Zearalenone (ZEA) is a contaminant of human food and animal feedstuffs that causes health hazards. However, the signal pathways underlying ZEA toxicity remain elusive. The aims of this study were to determine which pathways are involved in ZEA-induced cell death and investigate the effect of apoptosis inducing factor (AIF) on cell death during ZEA treatment in the immortalized goat Leydig cell line hTERT-GLC. This study showed that ZEA-induced cell death in hTERT-GLCs works via endoplasmic reticulum (ER) stress, the caspase-dependent pathway, the caspase-independent pathway and autophagy...
December 20, 2016: Reproductive Toxicology
https://www.readbyqxmd.com/read/28007540/screening-for-angiogenic-inhibitors-in-zebrafish-to-evaluate-a-predictive-model-for-developmental-vascular-toxicity
#6
Tamara Tal, Claire Kilty, Andrew Smith, Carlie LaLone, Brendán Kennedy, Alan Tennant, Catherine W McCollum, Maria Bondesson, Thomas Knudsen, Stephanie Padilla, Nicole Kleinstreuer
Chemically-induced vascular toxicity during embryonic development may cause a wide range of adverse effects. To identify putative vascular disrupting chemicals (pVDCs), a predictive pVDC signature was constructed from 124 U.S. EPA ToxCast high-throughput screening (HTS) assays and used to rank 1060 chemicals for their potential to disrupt vascular development. Thirty-seven compounds were selected for targeted testing in transgenic Tg(kdrl:EGFP) and Tg(fli1:EGFP) zebrafish embryos to identify chemicals that impair developmental angiogenesis...
December 19, 2016: Reproductive Toxicology
https://www.readbyqxmd.com/read/27988282/publishing-negative-findings-and-the-challenge-of-avoiding-type-ii-errors-in-studies-of-suspect-teratogens-example-of-a-recent-ondansetron-publication
#7
REVIEW
Stanley A Edlavitch
It is important that negative, as well as positive, studies be published to complete the available picture in areas of scientific inquiry. At the same time, it is critical that the implications of a negative study not be overstated and generalized when major issues of study design and data accuracy may be the reason that no relationship was discovered. The challenge of avoiding type II errors in interpreting negative findings has major public health implications, especially when the relationship of an exposure to birth defects is the concern...
December 15, 2016: Reproductive Toxicology
https://www.readbyqxmd.com/read/27956250/maternal-di-2-ethylhexyl-phthalate-exposure-during-pregnancy-causes-fetal-growth-restriction-in-a-stage-specific-but-gender-independent-manner
#8
Ru Shen, Ling-Li Zhao, Zhen Yu, Cheng Zhang, Yuan-Hua Chen, Hua Wang, Zhi-Hui Zhang, De-Xiang Xu
Di (2-ethylhexyl) phthalate (DEHP) is male developmental toxicant that impairs testis development with reduced anogenital distance. The present study aimed to investigate whether maternal DEHP exposure during pregnancy causes intrauterine growth restriction (IUGR) in a gender-specific manner and to identify the critical window of DEHP-induced fetal IUGR. Pregnant mice were administered with DEHP (0, 50 or 200mg/kg) by gavage. Fetal IUGR was observed not only in males but also in females when litters were exposed to DEHP on gestational day (GD)0-GD17...
December 9, 2016: Reproductive Toxicology
https://www.readbyqxmd.com/read/27939992/dioxin-metabolizing-genes-in-relation-to-effects-of-prenatal-dioxin-levels-and-reduced-birth-size-the-hokkaido-study
#9
Sumitaka Kobayashi, Fumihiro Sata, Chihiro Miyashita, Seiko Sasaki, Susumu Ban, Atsuko Araki, Houman Goudarzi, Jumboku Kajiwara, Takashi Todaka, Reiko Kishi
OBJECTIVES: We investigated the effects of maternal polymorphisms in 3 genes encoding dioxin-metabolizing enzymes in relation to prenatal dioxin levels on infant birth size in Japan. METHODS: We examined the relationship between dioxin exposure and birth size in relation to the polymorphisms in the genes encoding aromatic hydrocarbon receptor (AHR [G>A, Arg554Lys]), cytochrome P450 (CYP) 1A1 (T6235C), and glutathione S-transferase mu 1 (GSTM1; Non-null/null) in 421 participants using multiple linear regression models...
December 7, 2016: Reproductive Toxicology
https://www.readbyqxmd.com/read/27923600/determinants-of-orofacial-clefting-ii-effects-of-5-aza-2-deoxycytidine-on-gene-methylation-during-development-of-the-first-branchial-arch
#10
Ratnam S Seelan, Partha Mukhopadhyay, Dennis R Warner, Irina A Smolenkova, M Michele Pisano, Robert M Greene
Defects in development of the secondary palate, which arise from the embryonic first branchial arch (1-BA), can cause cleft palate (CP). Administration of 5-Aza-2'-deoxycytidine (AzaD), a demethylating agent, to pregnant mice on gestational day 9.5 resulted in complete penetrance of CP in fetuses. Several genes critical for normal palatogenesis were found to be upregulated in 1-BA, 12h after AzaD exposure. MethylCap-Seq (MCS) analysis identified several differentially methylated regions (DMRs) in DNA extracted from AzaD-exposed 1-BAs...
December 5, 2016: Reproductive Toxicology
https://www.readbyqxmd.com/read/27915015/who-seeks-teratology-information-service-s-advice-assessing-the-risk-of-selection-bias-in-observational-cohort-studies-on-drug-risks-in-pregnancy
#11
Evelin Beck, Anna Lechner, Christof Schaefer
All women of reproductive age should have access to Teratology Information Services (TIS). Observational cohort studies based on TIS data are one of the most important sources for risk characterization of drugs during pregnancy. A selection in TIS populations towards higher socioeconomic level would compromise the TIS' goal of health prevention and the quality of research. The aim of this study is to investigate in which respect Berlin TIS enquirers are different from the general female population of reproductive age in Germany...
November 30, 2016: Reproductive Toxicology
https://www.readbyqxmd.com/read/27915014/autism-spectrum-disorder-and-prenatal-exposure-to-selective-serotonin-reuptake-inhibitors-need-for-further-analysis
#12
LETTER
Jian-Jun Ou, Ya-Min Li
No abstract text is available yet for this article.
November 30, 2016: Reproductive Toxicology
https://www.readbyqxmd.com/read/27915013/-unknown-title
#13
LETTER
Tohru Kobayashi, Tasuku Matsuyama, Masanobu Takeuchi, Shinya Ito
No abstract text is available yet for this article.
November 30, 2016: Reproductive Toxicology
https://www.readbyqxmd.com/read/27915012/intra-laboratory-validated-human-cell-based-in-vitro-vasculogenesis-angiogenesis-test-with-serum-free-medium
#14
T Toimela, O Huttala, E Sabell, M Mannerström, J R Sarkanen, T Ylikomi, T Heinonen
Vasculogenesis and angiogenesis are the processes by which new blood vessels are formed. We have developed a serum-free human adipose stromal cell and umbilical cord vein endothelial cell based vasculogenesis/angiogenesis test. In this study, the test was validated in our GLP laboratory following the OECD Guidance Document 34 [1] using erlotinib, acetylic salicylic acid, levamisole, 2-methoxyestradiol, anti-VEGF, methimazole, and D-mannitol to show its reproducibility, repeatability, and predictivity for humans...
November 30, 2016: Reproductive Toxicology
https://www.readbyqxmd.com/read/27915011/determinants-of-orofacial-clefting-i-effects-of-5-aza-2-deoxycytidine-on-cellular-processes-and-gene-expression-during-development-of-the-first-branchial-arch
#15
Partha Mukhopadhyay, Ratnam S Seelan, Francine Rezzoug, Dennis R Warner, Irina A Smolenkova, Guy Brock, M Michele Pisano, Robert M Greene
In this study, we identify gene targets and cellular events mediating the teratogenic action(s) of 5-Aza-2'-deoxycytidine (AzaD), an inhibitor of DNA methylation, on secondary palate development. Exposure of pregnant mice (on gestation day (GD) 9.5) to AzaD for 12h resulted in the complete penetrance of cleft palate (CP) in fetuses. Analysis of cells of the embryonic first branchial arch (1-BA), in fetuses exposed to AzaD, revealed: 1) significant alteration in expression of genes encoding several morphogenetic factors, cell cycle inhibitors and regulators of apoptosis; 2) a decrease in cell proliferation; and, 3) an increase in apoptosis...
November 30, 2016: Reproductive Toxicology
https://www.readbyqxmd.com/read/27888070/phosphoramide-mustard-induces-autophagy-markers-and-mtor-inhibition-prevents-follicle-loss-due-to-phosphoramide-mustard-exposure
#16
Jill A Madden, Porsha Q Thomas, Aileen F Keating
Phosphoramide mustard (PM) is an ovotoxic metabolite of cyclophosphamide. Postnatal day 4 Fisher 344 rat ovaries were exposed to vehicle control (1% DMSO) or PM (60μM)±LY294002 or rapamycin for 2 or 4 d. Transmission election microscopy revealed abnormally large golgi apparatus and electron dense mitochondria in PM-exposed ovaries prior to and at the time of follicle depletion. PM exposure increased (P<0.05) mRNA abundance of Bbc3, Cdkn1a, Ctfr, Edn1, Gstp1, Nqo1, Tlr4, Tnfrsfla, Txnrd1 and decreased (P<0...
November 22, 2016: Reproductive Toxicology
https://www.readbyqxmd.com/read/27888069/vertebrate-embryos-as-tools-for-anti-angiogenic-drug-screening-and-function
#17
Shaunna L Beedie, Alexandra J Diamond, Lucas Rosa Fraga, William D Figg, Neil Vargesson
The development of new angiogenic inhibitors highlights a need for robust screening assays that adequately capture the complexity of vessel formation, and allow for the quantitative evaluation of the teratogenicity of new anti-angiogenic agents. This review discusses the use of screening assays in vertebrate embryos, specifically focusing upon chicken and zebrafish embryos, for the detection of anti-angiogenic agents.
November 22, 2016: Reproductive Toxicology
https://www.readbyqxmd.com/read/27871864/review-of-developmental-origins-of-health-and-disease-publications-in-environmental-epidemiology
#18
Jerrold J Heindel, Lesley A Skalla, Bonnie R Joubert, Caroline H Dilworth, Kimberly A Gray
The Developmental Origins of Health and Disease (DOHaD) scientific field investigates the influence of early life environmental stressors on later life health outcomes. Environmental chemical exposures are a particular focus area within this field. Although the DOHaD hypothesis originated in the 1990s, the data evaluating this hypothesis in environmental epidemiology has not been comprehensively summarized. We conducted a scoping literature review to describe the human evidence for the DOHaD hypothesis and to identify, 1) where there may be reasonable data to draw conclusions, and 2) areas warranting further research...
November 18, 2016: Reproductive Toxicology
https://www.readbyqxmd.com/read/27856370/effect-of-folic-acid-supplementation-on-preterm-delivery-and-small-for-gestational-age-births-a-systematic-review-and-meta-analysis
#19
Qian Zhang, Yuanyuan Wang, Xiaona Xin, Ya Zhang, Dujia Liu, Zuoqi Peng, Yuan He, Jihong Xu, Xu Ma
OBJECTIVE: To investigate the effect of folic acid (FA) supplementation on the risks of preterm delivery (PTD) and small for gestational age births (SGA). DATA SOURCES: Cohort studies were identified from MEDLINE, EMBASE, the Cochrane Library, CINAHL, and CBM from inception to January 2015. PARTICIPANTS AND INCLUDED STUDIES: Healthy women who want to get pregnancy or being pregnant. MAIN OUTCOME MEASURES: PTD and SGA...
November 14, 2016: Reproductive Toxicology
https://www.readbyqxmd.com/read/27851994/pregnancy-outcomes-after-maternal-varenicline-use-analysis-of-surveillance-data-collected-by-the-european-network-of-teratology-information-services
#20
J L Richardson, S Stephens, L M Yates, O Diav-Citrin, J Arnon, D Beghin, A Kayser, D Kennedy, D Cupitt, B Te Winkel, M Peltonen, Y C Kaplan, S H L Thomas
: Varenicline is a smoking cessation aid for which limited data exist concerning safety during human pregnancy. This multicentre prospective observational comparative cohort study was undertaken using surveillance data collected by the European Network of Teratology Information Services. The study sample consisted of 89 varenicline exposed pregnancies and two matched comparator groups; 267 non-teratogen exposed (NTE) controls and 78 exposed to nicotine replacement therapy or bupropion (NRT/B) for smoking cessation...
November 13, 2016: Reproductive Toxicology
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