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https://www.readbyqxmd.com/read/28812595/compulsive-like-sufentanil-vapor-self-administration-in-the-rat
#1
Janaina Cm Vendruscolo, Brendan J Tunstall, Stephanie A Carmack, Brooke E Schmeichel, Emily G Lowery-Gionta, Maury Cole, Olivier George, Sophia Vandewater, Michael Taffe, George F Koob, Leandro F Vendruscolo
Opioid misuse is at historically high levels in the United States, with inhalation (ie, smoking, and vaping) being one of the most common routes of consumption. We developed and validated a novel preclinical model of opioid self-administration by inhalation that does not require surgery and reliably produces somatic and motivational signs of dependence. Rats were trained to perform an operant response (nosepoke) to receive 10 s of vaporized sufentanil, a potent opioid, in 2 h daily sessions. Rats readily and concentration-dependently self-administered vaporized sufentanil...
August 16, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28803256/surface-structure-changes-of-pathological-placenta-tissue-observed-using-scanning-electron-microscopy-a-pilot-study
#2
Rafał Bobiński, Anna Pielesz, Wioletta Waksmańska, Ewa Sarna, Izabela Ulman-Włodarz, Justyna Kania, Monika Mikulska, Agnieszka Turbiarz
Structural changes within the placenta are observed in the course of pathological pregnancy. The aim of the study was to perform initial assessment of morphological features of placenta. The analysis was conducted by Scanning Electron Microscopy. Samples of placenta of women who delivered neonates appropriate for gestational age were characterized by a homogenous surface texture with natural corrugation. The surface of IUGR placenta from the group of mothers with pregnancy induced hypertension was definitely heterogeneous - noticeable swelling of tissue surface was observed...
August 12, 2017: Acta Biochimica Polonica
https://www.readbyqxmd.com/read/28796674/neonatal-morbidity-of-small-and-large-for-gestational-age-neonates-born-at-term-in-uncomplicated-pregnancies
#3
Suneet P Chauhan, Madeline Murguia Rice, William A Grobman, Jennifer Bailit, Uma M Reddy, Ronald J Wapner, Michael W Varner, John M Thorp, Kenneth J Leveno, Steve N Caritis, Mona Prasad, Alan T N Tita, George Saade, Yoram Sorokin, Dwight J Rouse, Jorge E Tolosa
OBJECTIVE: To compare morbidity among small-for-gestational-age (SGA; birth weight less than the 10th percentile for gestational age), appropriate-for-gestational-age (AGA; birth weight 10th to 90th percentile; reference group), and large-for-gestational-age (LGA; birth weight greater than the 90th percentile) neonates in apparently uncomplicated pregnancies at term (37 weeks of gestation or greater). METHODS: This secondary analysis, derived from an observational obstetric cohort of 115,502 deliveries, included women with apparently uncomplicated pregnancies of nonanomalous singletons who had confirmatory ultrasound dating no later than the second trimester and who delivered between 37 0/7 and 42 6/7 weeks of gestation...
August 4, 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28783528/maternal-body-mass-index-is-a-better-indicator-of-large-for-gestational-age-infants-compared-with-a-75-g-oral-glucose-tolerance-test-in-early-pregnancy-the-jags-trial
#4
Noriyuki Iwama, Takashi Sugiyama, Hirohito Metoki, Hideto Kusaka, Jota Maki, Hidekazu Nishigori, Nobuo Yaegashi, Norimasa Sagawa, Yuji Hiramatsu, Nagayasu Toyoda
AIMS: There is no previous study comparing the predictive ability of maternal pre-pregnancy body mass index (BMI) versus a 75-g oral glucose tolerance test (OGTT) in early pregnancy for large-for-gestational-age (LGA) infants. METHODS: This multi-institutional prospective cohort study included 966 pregnant Japanese women. A multiple logistic regression model was applied to compare the effect size of pre-pregnancy BMI, fasting plasma glucose (PG), and 1- and 2-h PG levels after a 75-g OGTT performed before 22weeks gestation for LGA...
July 22, 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/28773143/study-of-al-si-alloy-oxygen-saturation-on-its-microstructure-and-mechanical-properties
#5
Arkady Finkelstein, Arseny Schaefer, Оlga Chikova, Konstantin Borodianskiy
One of the main goals of modern materials research is obtaining different microstructures and studying their influence on the mechanical properties of metals; aluminum alloys are particularly of interest due to their advanced performance. Traditionally, their required properties are obtained by alloying process, modification, or physical influence during solidification. The present work describes a saturation of the overheated AlSi₇Fe₁ casting alloy by oxides using oxygen blowing approach in overheated alloy...
July 11, 2017: Materials
https://www.readbyqxmd.com/read/28758828/second-trimester-extracellular-micrornas-in-maternal-blood-and-fetal-growth-an-exploratory-study
#6
Rodosthenis S Rodosthenous, Heather H Burris, Alison P Sanders, Allan C Just, Alexandra E Dereix, Katherine Svensson, Maritsa Solano, Martha M Téllez-Rojo, Robert O Wright, Andrea A Baccarelli
Healthy feto-maternal communication is critical during pregnancy and is orchestrated by the placenta. Dysfunction of the placenta leads to fetal growth complications; however, the underlying biological mechanisms have yet to be fully elucidated. Circulating extracellular microRNAs (exmiRNAs) in the blood have been implicated in cell-to-cell communication. Therefore, exmiRNAs may provide useful biological information about communication between the mother, the fetus, and the placenta during pregnancy. We used logistic regression to determine the association of exmiRNAs with abnormal fetal growth by comparing mothers of infants classified as small-for-gestational age (SGA) (n = 36) and large-for-gestational age (LGA) (n = 13) to appropriate-for-gestational age (AGA), matched by gestational age at delivery and infant sex...
July 31, 2017: Epigenetics: Official Journal of the DNA Methylation Society
https://www.readbyqxmd.com/read/28730238/altered-expression-of-mtor-and-autophagy-in-term-normal-human-placentas
#7
Qiu Xia Zhang, Quan Na, Weiwei Song
Mammalian target of rapamycin (mTOR) and autophagy have been implied in trophoblast cells proliferation and invasion. This study investigated whether mTOR and autophagy were involved in placental development and fetal programming. A total of 90 term normal placentas (37-42 gestational weeks) were collected from women who underwent elective cesarean section, with large for gestational age (LGA), fetal growth restriction (FGR), and appropriate for gestational age (AGA) infants (n=30, respectively). Capillary volume density within peripheral villi significantly decreased in the FGR placentas compared with the AGA group (p<0...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28727729/induction-of-labor-versus-expectant-management-of-large-for-gestational-age-infants-in-nulliparous-women
#8
Karolina Moldéus, Yvonne W Cheng, Anna-Karin Wikström, Olof Stephansson
BACKGROUND: There is no apparent consensus on obstetric management, i.e., induction of labor or expectant management of women with suspected large-for-gestational-age (LGA)-fetuses. METHODS AND FINDINGS: To further examine the subject, a nationwide population-based cohort study from the Swedish Medical Birth Register in nulliparous non-diabetic women with singleton, vertex LGA (>90th centile) births, 1992-2013, was performed. Delivery of a live-born LGA infant induced at 38 completed weeks of gestation in non-preeclamptic pregnancies, was compared to those of expectant management, with delivery at 39, 40, 41, or 42 completed weeks of gestation and beyond, either by labor induction or via spontaneous labor...
2017: PloS One
https://www.readbyqxmd.com/read/28721142/maternal-lipids-associated-with-large-for-gestational-age-birth-weight-in-women-with-type-1-diabetes-results-from-a-prospective-single-center-study
#9
Paweł Gutaj, Ewa Wender-Ożegowska, Jacek Brązert
INTRODUCTION: Despite improvement in diabetes care over the years, the incidence of macrosomia in type 1 diabetic mothers is still very high and even shows an increasing tendency. It is suggested that other factors that maternal hyperglycemia might be associated with excessive fetal growth in diabetic mothers. The aim of this study was to determine whether maternal lipids might contribute to high rates of large-for-gestational-age (LGA) newborns in women with type 1 diabetes (T1DM). MATERIAL AND METHODS: This prospective, single-center study was performed in a population of women with T1DM admitted to the perinatal center for women with diabetes...
June 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28719900/second-to-third-trimester-longitudinal-growth-assessment-for-the-prediction-of-largeness-for-gestational-age-and-macrosomia-in-an-unselected-population
#10
Javier Caradeux, Elisenda Eixarch, Edurne Mazarico, Tri Rahmat Basuki, Eduard Gratacós, Francesc Figueras
BACKGROUND: Prenatal detection of excessive growth remains inaccurate. Most strategies rely on a single cross-sectional evaluation of fetal size during the third trimester. OBJECTIVES: To compare second- to third-trimester longitudinal growth assessment with cross-sectional evaluation at the third trimester in the prediction of largeness for gestational age (LGA) and macrosomia. METHODS: A cohort of 2,696 unselected singleton pregnancies scanned at 21 ± 2 and 32 ± 2 weeks was created...
July 13, 2017: Fetal Diagnosis and Therapy
https://www.readbyqxmd.com/read/28707388/the-associations-of-large-for-gestational-age-and-infant-feeding-practices-with-children-s-body-mass-index-z-score-trajectories-the-early-childhood-longitudinal-study-birth-cohort
#11
M Salahuddin, A Pérez, N Ranjit, D M Hoelscher, S H Kelder
Very few studies have examined if high birth weight and infant feeding practices have implications for the trajectory of body mass index (BMI) growth across the early childhood period. The goal of this study was to assess if large-for-gestational-age (LGA) and infant feeding practices (exclusive breastfeeding for 6 months, and early introduction of complementary food prior to 4 months) are associated with BMI z-score trajectories over the early childhood period. Group-based trajectory modelling (GBTM) methods were employed to describe and classify developmental BMI z-score trajectories (the outcome of interest) in children from 9 months to 4 years of age (n = 4497) born to prenatal non-smoking mothers in the Early Childhood Longitudinal Study, Birth Cohort (2001-2005)...
July 14, 2017: Clinical Obesity
https://www.readbyqxmd.com/read/28706753/evaluation-of-institute-of-medicine-guidelines-for-gestational-weight-gain-in-women-with-chronic-hypertension
#12
Anne M Siegel, Alan T Tita, Hannah Machemehl, Joseph R Biggio, Lorie M Harper
Objective  To assess the impact of gestational weight gain (GWG) outside the Institute of Medicine (IOM) recommendations on perinatal outcomes in pregnancies complicated by chronic hypertension (HTN). Methods  The study consisted of a retrospective cohort of all singletons with HTN from 2000 to 2014. Maternal outcomes examined were superimposed preeclampsia and cesarean delivery. Neonatal outcomes were small for gestational age (SGA), large for gestational age (LGA), and preterm birth (PTB). Groups were compared using analysis of variance and chi-squared test for trend...
July 2017: American Journal of Perinatology Reports
https://www.readbyqxmd.com/read/28704550/is-it-appropriate-for-korean-women-to-adopt-the-2009-institute-of-medicine-recommendations-for-gestational-weight-gain
#13
Jeong Ha Wie, In Yang Park, Jeong Namkung, Hae Won Seo, Min Jin Jeong, Ji Young Kwon
BACKGROUND: The 2009 Institute of Medicine (IOM) guidelines for gestational weight gain (GWG) are intended for use among women in the United States. Little data are available on whether the 2009 IOM recommendations can be applied to Asian women. This study aimed to evaluate whether the recommendations are related to adverse pregnancy outcomes in Korean pregnant women. METHODS AND FINDINGS: A retrospective cohort study was conducted for all singleton-pregnant women at a university hospital in Korea...
2017: PloS One
https://www.readbyqxmd.com/read/28702188/new-method-of-indocyanine-green-fluorescence-sentinel-node-mapping-for-early-gastric-cancer
#14
Hironori Ohdaira, Masashi Yoshida, Shinya Okada, Nobuhiro Tsutsui, Masaki Kitajima, Yutaka Suzuki
BACKGROUND: The present study describes the retrospective feasibility study of ICG fluorescence SN mapping in back-table for early gastric cancer using PINPOINT(®). METHOD: SN mapping were performed as following; the day before surgery, 0.5 ml ICG was injected endoscopically in four quadrants of the submucosa surrounding the gastric cancer using an endoscopic puncture. Intraoperatively, the gastrocolic ligament was divided to visualize all possible directions of lymphatic flow from the stomach...
August 2017: Annals of Medicine and Surgery
https://www.readbyqxmd.com/read/28700640/modeling-the-risk-of-transmission-of-schistosomiasis-in-akure-north-local-government-area-of-ondo-state-nigeria-using-satellite-derived-environmental-data
#15
Oluwaremilekun G Ajakaye, Oluwatola I Adedeji, Paul O Ajayi
Schistosomiasis is a parasitic disease and its distribution, in space and time, can be influenced by environmental factors such as rivers, elevation, slope, land surface temperature, land use/cover and rainfall. The aim of this study is to identify the areas with suitable conditions for schistosomiasis transmission on the basis of physical and environmental factors derived from satellite imagery and spatial analysis for Akure North Local Government Area (LGA) of Ondo State. Nigeria. This was done through methodology multicriteria evaluation (MCE) using Saaty's analytical hierarchy process (AHP)...
July 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28697684/what-is-the-accuracy-of-an-early-third-trimester-sonogram-for-identifying-lga-infants-born-to-gdm-patients-diagnosed-with-the-one-step-approach
#16
Kelsey J Simpson, Meredith Pavicic, Gene T Lee
PURPOSE: The one-step approach for screening of GDM will increase the incidence 2- to 3-fold. These larger cohorts may need to target high-morbidity subsets to be cost-effective. We asked whether ultrasound could stratify the GDM patients with the highest risk for a large for gestational age (LGA) infant. MATERIALS AND METHODS: A retrospective analysis was performed on 413 GDM patients diagnosed using the one-step approach. Ultrasound data from 28 weeks 0 day to 34 weeks 6 days was studied...
July 11, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28697099/intensive-prenatal-nutrition-counseling-in-a-community-health-setting-a-randomized-controlled-trial
#17
Alessandra Peccei, Tiffany Blake-Lamb, Debra Rahilly, Ida Hatoum, Allison Bryant
OBJECTIVE: To assess the effect of a culturally appropriate nutritional intervention delivered to overweight and obese patients in a community health setting on gestational weight gain and postpartum weight retention. MATERIALS AND METHODS: We conducted a randomized controlled trial of an intensive nutrition counseling intervention for overweight and obese women by a registered dietitian throughout pregnancy and 6 months postpartum. The primary outcome was likelihood of gestational weight gain within Institute of Medicine (IOM, now known as the Health and Medicine Division of the National Academies of Sciences, Engineering, and Medicine) guidelines...
August 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28693965/maternal-pre-gravid-cardiometabolic-health-and-infant-birthweight-a-prospective-pre-conception-cohort-study
#18
R Retnakaran, S W Wen, H Tan, S Zhou, C Ye, M Shen, G N Smith, M C Walker
BACKGROUND AND AIMS: Both low birthweight and high birthweight have been associated with the development of cardiometabolic disease in adulthood, possibly reflecting the effect of intrauterine fetal programming. As developmental programming can begin before conception, pre-gravid factors that predict birthweight may be relevant in this context. However, little is known about such factors. Thus, we established a pre-conception cohort to identify maternal pre-gravid cardiometabolic determinants of infant birthweight...
May 23, 2017: Nutrition, Metabolism, and Cardiovascular Diseases: NMCD
https://www.readbyqxmd.com/read/28693373/prenatal-growth-patterns-and-birthweight-are-associated-with-differential-dna-methylation-and-gene-expression-of-cardiometabolic-risk-genes-in-human-placentas-a-discovery-based-approach
#19
Pao-Yang Chen, Alison Chu, Wen-Wei Liao, Liudmilla Rubbi, Carla Janzen, Fei-Man Hsu, Shanthie Thamotharan, Amit Ganguly, Larry Lam, Dennis Montoya, Matteo Pellegrini, Sherin U Devaskar
Inherent genetic programming and environmental factors affect fetal growth in utero. Epidemiologic data in growth-altered fetuses, either intrauterine growth restricted (IUGR) or large for gestational age (LGA), demonstrate that these newborns are at increased risk of cardiometabolic disease in adulthood. There is growing evidence that the in utero environment leads to epigenetic modification, contributing to eventual risk of developing heart disease or diabetes. In this study, we used reduced representation bisulfite sequencing to examine genome-wide DNA methylation variation in placental samples from offspring born IUGR, LGA, and appropriate for gestational age (AGA) and to identify differential methylation of genes important for conferring risk of cardiometabolic disease...
January 1, 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/28688997/maternal-body-mass-index-impacts-fetal-placental-size-at-birth-and-umbilical-cord-oxygen-values-with-implications-for-regulatory-mechanisms
#20
Bryan S Richardson, Stephanie Ruttinger, Hilary K Brown, Timothy R H Regnault, Barbra de Vrijer
BACKGROUND: Maternal under- and over-nutrition are known to effect fetal growth with altered placental development and nutrient transport, but whether fetal oxygenation is also altered remains unknown. AIMS: To examine linkages between maternal BMI and birth weights, placental weights, and umbilical vein and artery PO2, with implications for signaling mechanisms. STUDY DESIGN: Population-based cohort study. SUBJECTS: Analysis of hospital database information on all patients with pre-pregnant BMI values delivering viable, singleton infants between Jan 1, 1999 and Dec 31, 2010 (N=29,212)...
July 6, 2017: Early Human Development
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