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https://www.readbyqxmd.com/read/29031189/renal-subcapsular-xenografing-of-human-fetal-external-genital-tissue-a-new-model-for-investigating-urethral-development
#1
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/29026765/screening-antenatal-anxiety-predicting-its-effect-on-fetal-growth
#2
Kaushik Sarkar, Goutam Das, Ranadip Chowdhury, Bhaskar Shahbabu, Ishita Sarkar, Santu Maiti, Aparajita Dasgupta
CONTEXT: Maternal anxiety has an association with low birth weight. However, studies are scarce to determine any association between maternal anxiety and fetal growth. AIMS: This study aims to determine the effect of maternal anxiety on fetal growth, measured by gestational age-dependent increase in fetal abdominal circumference (AC). The secondary objective is to determine the effect of maternal anxiety on other fetal parameters (biparietal diameter [BPD], head circumference [HC], femur length [FL])...
January 2017: Journal of Family Medicine and Primary Care
https://www.readbyqxmd.com/read/29025046/decreased-insulin-secretion-in-pregnant-rats-fed-a-low-protein-diet
#3
Haijun Gao, Eric Ho, Meena Balakrishnan, Vijay Yechoor, Chandra Yallampalli
Low protein (LP) diet during pregnancy leads to reduced plasma insulin levels in rodents, but the underlying mechanisms remain unclear. Glucose is the primary insulin secretagogue and enhanced glucose stimulated insulin secretion (GSIS) in beta cells contributes to compensation for insulin resistance and maintenance of glucose homeostasis during pregnancy. In this study we hypothesized that plasma insulin levels in pregnant rats fed LP diet is reduced due to disrupted GSIS of pancreatic islets. We first confirmed reduced plasma insulin levels, then investigated in vivo insulin secretion by glucose tolerance test and ex vivo GSIS of pancreatic islets in the presence of glucose at different doses, and KCl, glibenclamide and L-arginine...
August 28, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29025016/cohort-profile-nichd-fetal-growth-studies-singletons-and-twins
#4
Jagteshwar Grewal, Katherine L Grantz, Cuilin Zhang, Anthony Sciscione, Deborah A Wing, William A Grobman, Roger B Newman, Ronald Wapner, Mary E D'Alton, Daniel Skupski, Michael P Nageotte, Angela C Ranzini, John Owen, Edward K Chien, Sabrina Craigo, Paul S Albert, Sungduk Kim, Mary L Hediger, Germaine M Buck Louis
No abstract text is available yet for this article.
September 8, 2017: International Journal of Epidemiology
https://www.readbyqxmd.com/read/29024604/the-avian-embryo-as-a-model-for-fetal-alcohol-spectrum-disorders
#5
Susan M Smith, George R Flentke
Prenatal alcohol exposure (PAE) remains a leading preventable cause of structural birth defects and permanent neurodevelopmental disability. The chick (Gallus gallus domesticus) is a powerful embryological research model and was possibly the first (Fere, 1895) in which alcohol's teratogenicity was demonstrated. Pharmacologically relevant alcohol exposures in the range of 20-70 mM (20-80 mg/egg) disrupt chick embryo growth, morphogenesis, and behavior, and the resulting phenotypes strongly parallel those of mammalian models...
October 12, 2017: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
https://www.readbyqxmd.com/read/29024208/does-the-site-of-the-cord-insertion-increase-the-risk-of-adverse-outcome-twin-to-twin-transfusion-syndrome-and-discordant-growth-in-monochorionic-twin-pregnancies
#6
Isabel Couck, Nada Mourad Tawfic, Jan Deprest, Luc De Catte, Roland Devlieger, Liesbeth Lewi
BACKGROUND: It is insufficiently known to what degree the site of the cord insertions influences the risk of a complicated outcome in monochorionic twin pregnancies. OBJECTIVES: The purpose is to examine if the site of cord insertions as determined on prenatal ultrasound scan increases the risk of adverse outcome -defined as fetal or neonatal loss or birth prior to 32 weeks-, twin-to-twin transfusion syndrome (TTTS) and discordant growth. METHODS: We retrospectively studied a consecutive cohort of monochorionic diamniotic twin pregnancies followed from the first trimester...
October 11, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/29023818/commentary-on-montag-et%C3%A2-al-2017-the-importance-of-cbpr-in-fasd-prevention-with-american-indian-communities
#7
Jessica D Hanson, Tess L Weber
Prenatal alcohol consumption is a public health concern due to potential lifelong physical and cognitive effects in offspring, often presenting in the form of fetal alcohol syndrome (FAS) or other fetal alcohol spectrum disorders (FASD). FASD is the continuum of lifelong outcomes in those born prenatally exposed to alcohol and includes a diagnosis of fetal alcohol syndrome (FAS), which is diagnosed through facial abnormalities, growth retardation, and delayed brain growth (Hoyme et al., 2016), as well as secondary disabilities such as conduct disorders, mental illness, and psychosocial functioning...
October 10, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/29021295/mitochondrial-cardiomyopathy-caused-by-elevated-reactive-oxygen-species-and-impaired-cardiomyocyte-proliferation
#8
Donghui Zhang, Yifei Li, Danielle A Heims-Waldron, Vassilios J Bezzerides, Silvia Guatimosim, Yuxuan Guo, Fei Gu, Pingzhu Zhou, Zhiqiang Lin, Qing Ma, Jianming Liu, Da-Zhi Wang, William T Pu
Rationale: Although mitochondrial diseases often cause abnormal myocardial development, the mechanisms by which mitochondria influence heart growth and function are poorly understood. Objective: To investigate these disease mechanisms, we studied a genetic model of mitochondrial dysfunction caused by inactivation of Tfam (Transcription Factor A, Mitochondrial), a nuclear-encoded gene that is essential for mitochondrial gene transcription and mitochondrial DNA replication. Methods and Results:Tfam inactivation by Nkx2...
October 11, 2017: Circulation Research
https://www.readbyqxmd.com/read/29020825/the-yield-of-the-prenatal-work-up-in-intrauterine-growth-restriction-and-the-spectrum-of-fetal-abnormalities-detected-postnatally
#9
Rivka Sukenik-Halevy, Adi Katz, Rivka Regev, Ofer Markovitch, Reuven Sharony, Yael Ganor Paz, Tal Biron-Shental
OBJECTIVE: To evaluate the yield of work-up in intrauterine growth restriction (IUGR) pregnancies and their outcomes. MATERIALS AND METHODS: Retrospective data regarding prenatal work-up (serology, genetic testing and imaging), and neonatal outcomes of 198 IUGR pregnancies (estimated fetal weight < 10th percentile) were analyzed. RESULTS: IUGR was isolated in 72. Work-up performed in 158 (80%) cases was positive in 4 (2.5%). No abnormalities were detected in prenatal genetic testing...
October 11, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29020643/association-of-methylmercury-intake-from-seafood-consumption-and-blood-mercury-level-among-the-asian-and-non-asian-populations-in-the-united-states
#10
Yangyang Liu, Susan Buchanan, Henry A Anderson, Zhiwen Xiao, Victoria Persky, Mary E Turyk
BACKGROUND: MeHg is a well-established neurotoxicant for fetal brain growth and development and has been shown to increase the risk of cardiovascular disease in aging populations. In the U.S., Asian populations are of particular concern because of their seafood consumption behaviors. OBJECTIVES: Our objective was to calculate the average daily MeHg intake (ADMI) from seafood and to assess the relationship between ADMI with blood methylmercury (BMeHg) concentrations, specifically among women of reproductive age (WORA) and adults ≥ 50 years of age...
October 8, 2017: Environmental Research
https://www.readbyqxmd.com/read/29020282/elevated-levels-of-estradiol-in-hiv-positive-pregnant-women-on-protease-inhibitor-based-regimens
#11
Kayode A Balogun, Monica Guzman Lenis, Eszter Papp, Mona Loutfy, Mark H Yudin, Jay MacGillivray, Sharon L Walmsley, Michael Silverman, Lena Serghides
Background: HIV-positive pregnant women on protease inhibitor (PI)-based combination antiretroviral therapy (cART) have a greater risk for adverse birth outcomes, and an association with steroid hormone levels has been implicated. The objective of this study was to investigate the association between PI-cART and estradiol levels in pregnancy. Methods: Fifty-five HIV-positive and 49 HIV-negative Canadian pregnant women were followed prospectively throughout gestation...
August 24, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29019748/doppler-us-in-the-evaluation-of-fetal-growth-and-perinatal-health
#12
Kristen R Uquillas, Brendan H Grubbs, Ashley E Prosper, Ramen H Chmait, Edward G Grant, Daphne K Walker
Fetal growth restriction is commonly defined as an estimated fetal weight (EFW) that is below the 10th percentile for gestational age. It is associated with an increased risk of intrauterine demise, neonatal morbidity, and neonatal death; therefore, antenatal detection and surveillance with the optimization of delivery timing are necessary to improve pregnancy outcomes. If the estimated due date has been verified and the EFW is below the 10th percentile for gestational age, the underlying cause should be investigated, since the clinical management, outcome, and counseling options are largely dependent on the cause of the growth restriction...
October 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/29017960/upper-respiratory-tract-nociceptor-stimulation-and-stress-response-following-acute-and-repeated-cyfluthrin-inhalation-in-normal-and-pregnant-rats-physiological-rat-specific-adaptions-can-easily-be-misunderstood-as-adversities
#13
Juergen Pauluhn
This paper reviews the results from past regulatory and mechanistic inhalation studies in rats with the type II pyrethroid Cyfluthrin. Apart from many chemical irritants, Cyfluthrin was shown to be a neuroexcitatory agent without any inherent tissue-destructive or irritant property. Thus, any Cyfluthrin-induced neuroexcitatory afferent sensory stimulus from peripheral nociceptors in the upper respiratory tract is likely to be perceived as a transient stimulus triggering annoyance and/or avoidance by both rats and humans...
October 7, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/29017633/associations-between-maternal-prenatal-stress-methylation-changes-in-igf1-and-igf2-and-birth-weight
#14
D Montoya-Williams, J Quinlan, C Clukay, N C Rodney, D A Kertes, C J Mulligan
Maternal stress has been linked to low birth weight in newborns. One potential pathway involves epigenetic changes at candidate genes that may mediate the effects of prenatal maternal stress on birth weight. This relationship has been documented in stress-related genes, such as NR3C1. There is less literature exploring the effect of stress on growth-related genes. IGF1 and IGF2 have been implicated in fetal growth and development, though via different mechanisms as IGF2 is under imprinting control. In this study, we tested for associations between prenatal stress, methylation of IGF1 and IGF2, and birth weight...
October 11, 2017: Journal of Developmental Origins of Health and Disease
https://www.readbyqxmd.com/read/29017154/screening-performance-of-placental-growth-factor-for-the-prediction-of-low-birth-weight-and-adverse-intrapartum-and-neonatal-outcomes-in-a-term-low-risk-population
#15
Larissa N Bligh, Ristan M Greer, Sailesh Kumar
INTRODUCTION: Fetuses who fail to reach their genetic growth potential are thought to have sub-optimal placental function. Low placental growth factor (PlGF) levels have been shown to be predictive of placentally mediated conditions, such as pre-eclampsia or fetal growth restriction. We investigated the screening performance of PlGF for the prediction of low birth weight (<10th centile for gestation) and adverse intrapartum and neonatal outcomes in apparently low-risk term pregnancies...
October 11, 2017: Fetal Diagnosis and Therapy
https://www.readbyqxmd.com/read/29017023/maternal-iron-nutriture-as-a-critical-modulator-of-fasd-risk-in-alcohol-exposed-pregnancies
#16
Kaylee K Helfrich, Nipun Saini, Pamela J Kling, Susan M Smith
Alcohol consumption during pregnancy places the fetus at risk for permanent physical, cognitive, and behavioral impairments, collectively termed fetal alcohol spectrum disorders (FASD). However, prenatal alcohol exposure (PAE) outcomes vary widely, and growing evidence suggests that maternal nutrition is a modifying factor. Certain nutrients, such as iron, may modulate FASD outcomes. Untreated gestational iron deficiency (ID) causes persistent neurodevelopmental deficits in the offspring that affect many of the same domains damaged by PAE...
October 10, 2017: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
https://www.readbyqxmd.com/read/28994115/the-effect-of-fertility-treatment-on-adverse-perinatal-outcomes-in-women-aged-at-least-40-years
#17
Avi Harlev, Asnat Walfisch, Eynan Oran, Iris Har-Vardi, Michael Friger, Eitan Lunenfeld, Eliahu Levitas
OBJECTIVE: To compare perinatal outcomes between spontaneous conception and assisted reproductive technologies (ART) among patients of advanced maternal age. METHODS: The present retrospective study included data from singleton pregnancies of women aged at least 40 years who delivered between January 1, 1991, and December 31, 2013, at Soroka University Medical Center, Beer Sheva, Israel. Demographic, obstetric, and perinatal data were compared between pregnancies conceived with ART (in vitro fertilization [IVF] or ovulation induction) and those conceived spontaneously...
October 10, 2017: International Journal of Gynaecology and Obstetrics
https://www.readbyqxmd.com/read/28994098/the-impact-of-antiandrogen-flutamide-on-the-hypoxia-inducible-factor-1%C3%AE-and-vascular-endothelial-growth-factor-a-gene-and-protein-expression-in-the-pig-placenta-during-late-pregnancy
#18
Elzbieta Czaja, Iwona Wieciech-Rojkiewicz, Katarzyna Knapczyk-Stwora, Malgorzata Grzesiak, Maria Słomczynska
INTRODUCTION: In contrast to estradiol action, little is known about androgen signaling in placental development. The purpose of this study was to evaluate the impact of diminished androgen action on hypoxia inducible factor 1α (HIF-1α) and vascular endothelial growth factor A (VEGFA) protein expression as well as their mRNAs in the structures of fetal and maternal parts of porcine placenta during late pregnancy. MATERIAL AND METHODS: Pregnant pigs were injected daily with antiandrogen flutamide, at a dose of 50 mg/kg body weight at different stages of pregnancy: between gestational days 83-89 (90 dpc) and 101-107 (108 dpc)...
October 10, 2017: Folia Histochemica et Cytobiologica
https://www.readbyqxmd.com/read/28993898/dynamic-transcriptomic-analysis-in-hircine-longissimus-dorsi-muscle-from-fetal-to-neonatal-development-stages
#19
Siyuan Zhan, Wei Zhao, Tianzeng Song, Yao Dong, Jiazhong Guo, Jiaxue Cao, Tao Zhong, Linjie Wang, Li Li, Hongping Zhang
Muscle growth and development from fetal to neonatal stages consist of a series of delicately regulated and orchestrated changes in expression of genes. In this study, we performed whole transcriptome profiling based on RNA-Seq of caprine longissimus dorsi muscle tissue obtained from prenatal stages (days 45, 60, and 105 of gestation) and neonatal stage (the 3-day-old newborn) to identify genes that are differentially expressed and investigate their temporal expression profiles. A total of 3276 differentially expressed genes (DEGs) were identified (Q value < 0...
October 9, 2017: Functional & Integrative Genomics
https://www.readbyqxmd.com/read/28993175/smfm-special-statement-research-to-knowledge-promoting-the-training-of-physician-scientists-in-the-biology-of-pregnancy
#20
Yoel Sadovky, Aaron B Caughey, Michelle DiVito, Mary E D'Alton, Amy P Murtha
Common disorders of pregnancy, such as preeclampsia, preterm birth, and fetal growth abnormalities, continue to challenge perinatal biologists seeking insights into disease pathogenesis that will result in better diagnosis, therapy, and disease prevention. These challenges have recently been intensified with discoveries that associate gestational diseases with long-term maternal and neonatal outcomes. Whereas modern high-throughput investigative tools enable scientists and clinicians to non-invasively probe the maternal-fetal genome, epigenome, and other analytes, their implications for clinical medicine remain uncertain...
October 6, 2017: American Journal of Obstetrics and Gynecology
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