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Prenatal exposure

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https://www.readbyqxmd.com/read/28531807/high-post-natal-mortality-associated-with-defects-in-lung-maturation-and-reduced-adiposity-in-mice-with-gestational-exposure-to-high-fat-and-n-acetylcysteine
#1
Lyda Williams, Maureen J Charron, Rani S Sellers
Studies have demonstrated that maternal consumption of a high fat diet (HFD) increases offspring susceptibility to metabolic disease. This study was initiated to identify the mechanistic contribution of oxidative stress on this phenomenon. Two weeks prior to mating, dams were fed either HFD or Control diet with or without supplementation with the anti-oxidant N-acetylcysteine (NAC). Pups born to HFD dams had reduced crown rump length (CRL) at birth and higher neonatal mortality compared to pups from Control dams...
May 14, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28529816/sclerostin-activity-plays-a-key-role-in-the-negative-effect-of-glucocorticoid-signaling-on-osteoblast-function-in-mice
#2
Eric E Beier, Tzong-Jen Sheu, Emily A Resseguie, Masahiko Takahata, Hani A Awad, Deborah A Cory-Slechta, J Edward Puzas
Stress during prenatal development is correlated with detrimental cognitive and behavioral outcomes in offspring. However, the long-term impact of prenatal stress (PS) and disrupted glucocorticoid signaling on bone mass and strength is not understood. In contrast, the detrimental effect of lead (Pb) on skeletal health is well documented. As stress and Pb act on common biological targets via glucocorticoid signaling pathways and co-occur in the environment, this study first sought to assess the combined effect of stress and Pb on bone quality in association with alterations in glucocorticoid signaling...
2017: Bone Research
https://www.readbyqxmd.com/read/28529052/prenatal-melamine-exposure-induces-impairments-of-spatial-cognition-and-hippocampal-synaptic-plasticity-in-female-adolescent-rats
#3
Lei An, Wei Sun
Developmental exposure to melamine induces long-term effects on brain and behavior in male rodents. To examine whether this prenatal event damages cognitive function in female offspring, we evaluated the behavioral effects and further attempted to investigate synaptic function. Prenatal melamine exposure (PME) was given by oral treatment to pregnant females through the whole gestational days with 400mg/day/kg bodyweight. On postnatal day (PD) 36, female offspring were assessed for spatial cognition in the Morris Water Maze (MWM) test...
May 18, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28528960/prenatal-stress-and-epigenetics
#4
REVIEW
L Cao-Lei, S R De Rooij, S King, S G Matthews, G A S Metz, T J Roseboom, M Szyf
In utero exposure to environmental stress in both animals and humans could result in long-term epigenome alterations and which further lead to consequences for adaptation and development in the offspring. Epigenetics, especially DNA methylation, is considered one of the most widely studied and well-characterized mechanisms involved in the long-lasting effects of in utero stress exposure. In this review, we outlined evidence from animal and human prenatal research supporting the view that prenatal stress could lead to lasting, broad and functionally organized signatures in DNA methylation which, in turn, could mediate exposure-phenotype associations...
May 18, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28528174/prenatal-exposure-to-di-n-butyl-phthalate-disrupts-the-development-of-adult-leydig-cells-in-male-rats-during-puberty
#5
Xiaomin Chen, Linxi Li, Huitao Li, Hongguo Guan, Yaoyao Dong, Xiaoheng Li, Qiufan Wang, Qingquan Lian, Guoxin Hu, Ren-Shan Ge
Fetal exposure to di-n-butyl phthalate (DBP) causes the adult disease such as lower testosterone production and infertility. However, the mechanism is still unknown. The objective of the present study is to determine how DBP affects the involution of fetal Leydig cells during the neonatal period and how this event causes the delayed development of the adult Leydig cells during puberty. The pregnant Sprague Dawley dams were randomly divided into 3 groups and were gavaged with 0 (corn oil, the vehicle control), 100 or 500mg/kg DBP from gestational day 12 (G12) to G21...
May 17, 2017: Toxicology
https://www.readbyqxmd.com/read/28527753/asymmetry-and-empathy-higher-asymmetry-is-associated-with-lower-levels-of-mentalizing
#6
Colton B Christian, Azim F Shariff
People differ in their mentalizing abilities. Though past research suggests that individual differences in exposure to prenatal testosterone may be able to explain why some people excel at mentalizing, while others struggle, meta-analyses yield a null relationship between 2D:4D ratio (a proxy for prenatal testosterone) and mentalizing. Importantly, however, past research has not examined the asymmetrical differences between the digit ratios on the right and left hands. In the current work, we test whether the difference between the digit ratios of the left and right hands may function as a better predictor of mentalizing than digit ratio alone...
May 18, 2017: Early Human Development
https://www.readbyqxmd.com/read/28526515/prenatal-lipopolysaccharide-induces-hypothalamic-dopaminergic-hypoactivity-and-autistic-like-behaviors-repetitive-self-grooming-and-stereotypies
#7
Thiago B Kirsten, Maria M Bernardi
Previous investigations by our group have shown that prenatal exposure to lipopolysaccharide (LPS), which mimics infection by gram-negative bacteria, induces social, cognitive, and communication deficits. For a complete screening of autistic-like behaviors, the objective of this study was to evaluate if our rat model also induces restricted and repetitive stereotyped behaviors. Thus, we studied the self-grooming microstructure. We also studied the neurochemistry of hypothalamus and frontal cortex, which are brain areas related to autism to better understand central mechanisms involved in our model...
May 16, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28526456/combined-exposure-to-low-doses-of-pesticides-causes-decreased-birth-weights-in-rats
#8
Ulla Hass, Sofie Christiansen, Marta Axelstad, Martin Scholze, Julie Boberg
Decreased birth weight is a common effect of many pesticides in reproductive toxicity studies, but there are no empirical data on how pesticides act in combination on this endpoint. We hypothesized that a mixture of six pesticides (cyromazine, MCPB, pirimicarb, quinoclamine, thiram, and ziram) would decrease birth weight, and that these mixture effects could be predicted by the Dose Addition model. Data for the predictions were obtained from the Draft Assessment Reports of the individual pesticides. A mixture of equi-effective doses of these pesticides was tested in two studies in Wistar rats, showing mixture effects in good agreement with the additivity predictions...
May 16, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/28526030/prenatal-bisphenol-a-exposure-and-dysregulation-of-infant-hypothalamic-pituitary-adrenal-axis-function-findings-from-the-apron-cohort-study
#9
Gerald F Giesbrecht, Maede Ejaredar, Jiaying Liu, Jenna Thomas, Nicole Letourneau, Tavis Campbell, Jonathan W Martin, Deborah Dewey
BACKGROUND: Animal models show that prenatal bisphenol A (BPA) exposure leads to sexually dimorphic disruption of the neuroendocrine system in offspring, including the hypothalamic-pituitary-adrenal (HPA) neuroendocrine system, but human data are lacking. In humans, prenatal BPA exposure is associated with sex-specific behavioural problems in children, and HPA axis dysregulation may be a biological mechanism. The objective of the current study was to examine sex differences in associations between prenatal maternal urinary BPA concentration and HPA axis function in 3 month old infants...
May 19, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28525627/geographic-patterns-of-autism-spectrum-disorder-among-children-of-nurses-health-study-ii-women
#10
Kate Hoffman, Marc G Weisskopf, Andrea L Roberts, Raanan Raz, Jaime E Hart, Kristen Lyall, Elin M Hoffman, Francine Laden, Verónica M Vieira
Data indicate that autism spectrum disorder (ASD) prevalence may be increasing and varies geographically. We investigated associations between residential location and ASD in the children of Nurses' Health Study II women in order to generate hypotheses about social and environmental factors related to etiology or diagnosis. Analyses included 13,507 children born from 1989-1999 (486 with ASD). We explored relationships between ASD and residential location at both birth and age 6 years (i.e. closer to average diagnosis age)...
May 19, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28524771/mercury-levels-in-parturient-and-newborns-from-aveiro-region-portugal
#11
Ana Catarina Alves, Marta S Monteiro, Ana Luísa Machado, Mário Oliveira, Ana Bóia, Ana Correia, Nuno Oliveira, Amadeu M V M Soares, Susana Loureiro
Since the outbreak of methylmercury (MeHg) poisoning in Japan and Iraq, mercury (Hg) is classified as well-established teratogen. The Portuguese region of Aveiro faced some decades ago an environmental Hg contamination due to activities from a chlor-alkali plant. Until now, no apparent evaluation was conducted regarding prenatal exposure to Hg in this area. The main objectives of this study were to: i) assess maternal and fetal exposure to Hg in the Aveiro region using noninvasive biological matrices; ii) examine the influence of variables that may contribute to Hg exposure during pregnancy; and iii) improve knowledge regarding metal accumulation and distribution over the maternal-fetal-placental unit...
May 19, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28523385/attention-deficit-hyperactivity-disorder-adhd-symptoms-in-children-adopted-from-poland-and-their-atypical-association-patterns-a-bayesian-approach
#12
Donna A de Maat, Sandra Knuiman, Catharina H A M Rijk, René A C Hoksbergen, Anneloes L van Baar
Although high rates of attention-deficit hyperactivity disorder (ADHD) symptoms have been observed among internationally adopted children, research on these symptoms in Polish adoptees is lacking. Therefore, we examined ADHD symptoms in Polish adoptees and their relationship to pre-adoptive risk factors, that is, time in institutional care, early deprivation, and prenatal alcohol exposure. We further compared the association patterns and gender distribution of ADHD symptoms in children adopted from Poland to those reported in the literature for ADHD symptoms in non-adopted children...
May 18, 2017: Journal of Abnormal Child Psychology
https://www.readbyqxmd.com/read/28523300/prenatal-glucocorticoid-administration-persistently-increased-the-immunohistochemical-expression-of-type-1-metabotropic-glutamate-receptor-and-purkinje-cell-dendritic-growth-in-the-cerebellar-cortex-of-the-rat
#13
Rodrigo Pascual, Odra Santander, Isabel Cuevas, Martina Valencia
Several studies have indicated that abnormal prenatal changes in the circulating glucocorticoids (GCs), induced by either maternal stress or exogenous GC administration, significantly alter the development of Purkinje cells (PCs). Among the suggested mechanisms that could mediate this GC-dependent PC susceptibility are changes in the expression of type-1 metabotropic glutamate receptors (mGluR1). In the current study, we analyzed whether a single course of prenatally administered betamethasone phosphate (BET) in pregnant rats increased the immunohistochemical expression of mGluR1 in PCs and decreased PC dendritic growth...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28521257/arsenic-in-drinking-water-and-adverse-birth-outcomes-in-ohio
#14
Kirsten S Almberg, Mary E Turyk, Rachael M Jones, Kristin Rankin, Sally Freels, Judith M Graber, Leslie T Stayner
BACKGROUND: Arsenic in drinking water has been associated with adverse reproductive outcomes in areas with high levels of naturally occurring arsenic. Less is known about the reproductive effects of arsenic at lower levels. OBJECTIVES: This research examined the association between low-level arsenic in drinking water and small for gestational age (SGA), term low birth weight (term LBW), very low birth weight (VLBW), preterm birth (PTB), and very preterm birth (VPTB) in the state of Ohio...
May 15, 2017: Environmental Research
https://www.readbyqxmd.com/read/28516762/organophosphorus-flame-retardants-in-pregnant-women-and-their-transfer-to-chorionic-villi
#15
Fanrong Zhao, Mo Chen, Fumei Gao, Huan Shen, Jianying Hu
The potential for prenatal exposure has recently raised concerns over the health risks of endocrine disruptors; however, knowledge about human prenatal exposure to organophosphorus flame retardants (OPFRs) is lacking. In this study, 2-ethylhexyl diphenyl phosphate (EHDPP), tributyl phosphate (TBP), triphenyl phosphate (TPHP), and tris(2-chloroethyl) phosphate (TCEP) were detected in the majority of chorionic villus samples, with median concentrations of 13.6, 18.8, 11.1, and 0.51 ng/g dry weight (dw), respectively, significantly higher than those in the matching maternal decidua samples (5...
May 18, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28516261/-metals-and-their-compounds-as-contaminants-in-food-arsenic-cadmium-lead-and-aluminum
#16
REVIEW
Andrea Hartwig, Gunnar Jahnke
Metals and their compounds are ubiquitously distributed in the environment, thus reaching plant and animal derived food. While actual exposure levels in Europe do not give rise to concern for acute toxicity, chronic toxicity of some metals and metalloids cannot be completely ruled out. Thus, in the case of inorganic arsenic, an elevated risk of carcinogenicity in different organs cannot be excluded even under actual dietary exposure conditions. In the case of cadmium, nephrotoxicity may be a particular problem for certain subgroups, such as children...
May 17, 2017: Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz
https://www.readbyqxmd.com/read/28515221/regulation-of-cerebral-arterial-bkca-channels-by-angiotensin-ii-signaling-in-adult-offspring-exposed-to-prenatal-high-sucrose-diets
#17
Xiuxia Gu, Axin He, Xiaorong Fan, Ruixiu Shi, Xueqin Feng, Le Bo, Lin Jiang, Na Li, Jue Wu, Yuxian Yang, Qinqin Gao, Zhice Xu
Prenatal insults have been shown to affect vascular functions, leading to increased risks of cardiovascular diseases in offspring. The present study determined whether high sucrose intake in pregnancy affected central vascular functions in middle cerebral artery (MCA) of offspring. Sprague-Dawley rats were fed a standard food and tap water with normal or high (20%) sucrose content during pregnancy. Offspring were maintained with normal diets and tap water. Central vascular functions and related ion channels were assessed in male offspring at 5 months old...
May 17, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28514952/distributions-and-determinants-of-urinary-biomarkers-of-organophosphate-pesticide-exposure-in-a-prospective-spanish-birth-cohort-study
#18
Sabrina Llop, Mario Murcia, Carmen Iñiguez, Marta Roca, Llúcia González, Vicent Yusà, Marisa Rebagliato, Ferran Ballester
BACKGROUND: Prenatal exposure to organophosphate pesticides (OPs) has been associated with impaired child development. Pesticide exposure determinants need to be studied in order to identify sources and pathways of pesticide exposure. The aim of this paper is to describe prenatal exposure to OPs and evaluate the associated factors in pregnant women. METHODS: The study population consisted of pregnant women (n = 573) who participated in the INMA birth cohort study in Valencia (Spain, 2003-2006)...
May 17, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28514694/the-association-of-prenatal-cocaine-exposure-externalizing-behavior-and-adolescent-substance-use
#19
Sonia Minnes, Meeyoung O Min, June-Yung Kim, Meredith W Francis, Adelaide Lang, Miaoping Wu, Lynn T Singer
Prenatal cocaine exposure (PCE) may increase adolescent substance use through alterations of neurotransmitter systems affecting fetal brain development. The relationship between PCE and substance use at 15 and 17 years was examined. Subjects (365: 186 PCE; 179 non-cocaine exposed (NCE)) supplied biologic and self-report data using the Youth Risk Behavior Surveillance System (YRBSS) and Computerized Diagnostic Interview Schedule for Children (C-DISC 4) at ages 15 and 17. The relationship between PCE and substance use was assessed using General Estimating Equation (GEE) analyses controlling for confounding factors including violence exposure and preschool lead level...
March 24, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28512918/postpartum-contraceptive-choices-among-women-attending-a-well-baby-clinic-in-ghana
#20
Emmanuel S K Morhe, Frank Ankobea, Gerald O Asubonteng, Baafuor Opoku, Cornelius A Turpin, Vanessa K Dalton
OBJECTIVE: To assess postpartum contraceptive choices among women attending a well-baby clinic in Ghana. METHODS: From April 1 to May 31, 2011, a descriptive cross-sectional survey was conducted among women who attended the well-baby clinic of Komfo Anokye Teaching Hospital, Kumasi, at 6-24 months after delivery. Participants were consecutively recruited and interviewed using semi-structured questionnaires. Data were collected on demographics, exposure to family planning counseling, message content, and postpartum contraceptive choices...
May 17, 2017: International Journal of Gynaecology and Obstetrics
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