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https://www.readbyqxmd.com/read/28427038/urinary-triclosan-concentrations-during-pregnancy-and-birth-outcomes
#1
Taylor M Etzel, Antonia M Calafat, Xiaoyun Ye, Aimin Chen, Bruce P Lanphear, David A Savitz, Kimberly Yolton, Joseph M Braun
BACKGROUND: Triclosan is an antimicrobial chemical used in consumer products, and exposure is ubiquitous among pregnant women in the United States. Triclosan may reduce the levels of thyroid hormones that are important for fetal growth and development. OBJECTIVE: We investigated the relationship of prenatal triclosan exposure with birth anthropometry and gestational duration. METHODS: We used data from 378 mother-child pairs participating in the Health Outcomes and Measures of the Environment (HOME) Study, a prospective pregnancy and birth cohort from Cincinnati, OH...
April 17, 2017: Environmental Research
https://www.readbyqxmd.com/read/28414788/patients-with-subclinical-hypothyroidism-before-20-weeks-of-pregnancy-have-a-higher-risk-of-miscarriage-a-systematic-review-and-meta-analysis
#2
Yibing Zhang, Haoyu Wang, Xifeng Pan, Weiping Teng, Zhongyan Shan
OBJECTIVE: To evaluate the relationship between subclinical hypothyroidism (SCH) and the risk of miscarriage before 20 weeks of pregnancy. METHODS: Literature databases were searched, including the PubMed, Web of Science, Embase and Cochrane databases, from January 1, 1980, to December 31, 2015. The following search terms were used: subclinical hypothyroidism, hypothyroidism, thyroid dysfunction, thyroid hypofunction, subclinical thyroid disease, thyroid dysfunction, pregnancy loss, abortion and miscarriage...
2017: PloS One
https://www.readbyqxmd.com/read/28412871/the-effect-of-oil-and-water-soluble-contrast-medium-in-hysterosalpingography-on-thyroid-function
#3
Shuhei So, Wakasa Yamaguchi, Hiroko Tajima, Takeshi Nakayama, Naoaki Tamura, Naohiro Kanayama, Fumiko Tawara
Hysterosalpingography (HSG) using iodinated contrast medium is X-ray diagnostic test that examines the inside of the uterus and fallopian tubes in infertile women. In this study, we compared thyroid function (thyroid stimulating hormone: TSH and free-T4: FT4 levels) after HSG with an oil-soluble contrast medium (OSCM) and a water-soluble contrast medium (WSCM). One hundred and sixty-four and 94 patients with normal thyroid function received HSG with OSCM and WSCM, respectively. Approximately 25% of the women in the OSCM group developed subclinical hypothyroidism (SCH), whereas only less than 10% of the patients in the WSCM group developed SCH...
April 17, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/28410473/thyroid-hormone-parameters-during-pregnancy-in-relation-to-urinary-bisphenol-a-concentrations-a-repeated-measures-study
#4
Max T Aung, Lauren E Johns, Kelly K Ferguson, Bhramar Mukherjee, Thomas F McElrath, John D Meeker
BACKGROUND: Maternal supply of thyroid hormones during pregnancy serves a critical role in fetal development. Although animal and in vitro studies provide evidence for thyroid hormone disruption as a result of bisphenol A (BPA) exposure, there is still a lack of evidence in human studies, particularly in the context of pregnancy. OBJECTIVES: We aimed to explore the associations between urinary BPA concentrations and plasma thyroid hormone parameters during gestation in pregnant women, and also investigated potential windows of vulnerability during gestation...
April 11, 2017: Environment International
https://www.readbyqxmd.com/read/28395858/association-between-exposure-to-organochlorine-compounds-and-maternal-thyroid-status-role-of-the-iodothyronine-deiodinase-1-gene
#5
Sabrina Llop, Mario Murcia, Mar Alvarez-Pedrerol, Joan O Grimalt, Loreto Santa-Marina, Jordi Julvez, Fernando Goñi-Irigoyen, Mercedes Espada, Ferran Ballester, Marisa Rebagliato, Maria-Jose Lopez-Espinosa
INTRODUCTION: Exposure to organochlorine compounds (OCs) may interfere with thyroid hormone (TH) homeostasis. The disruption of the deiodinase (DIO) enzymes has been proposed as a mechanism of action. AIM: To evaluate the association between exposure to OCs and TH status in pregnant women, as well as to explore the role of genetic variations in the DIO1 and DIO2 genes. METHODS: The study population (n=1128) was composed of pregnant women who participated in the INMA Project (Spain, 2003-2006)...
April 8, 2017: Environment International
https://www.readbyqxmd.com/read/28391432/thyroxine-exposure-effects-on-the-cranial-base
#6
Emily Durham, R Nicole Howie, Trish Parsons, Grace Bennfors, Laurel Black, Seth M Weinberg, Mohammed Elsalanty, Jack C Yu, James J Cray
Thyroid hormone is important for skull bone growth, which primarily occurs at the cranial sutures and synchondroses. Thyroid hormones regulate metabolism and act in all stages of cartilage and bone development and maintenance by interacting with growth hormone and regulating insulin-like growth factor. Aberrant thyroid hormone levels and exposure during development are exogenous factors that may exacerbate susceptibility to craniofacial abnormalities potentially through changes in growth at the synchondroses of the cranial base...
April 8, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28391251/gestational-age-specific-reference-intervals-for-serum-thyroid-hormone-levels-in-a-multi-ethnic-population
#7
Clement K M Ho, Edward T H Tan, Mor Jack Ng, George S H Yeo, Bernard Chern, Nancy W S Tee, Kenneth Y C Kwek, Kok Hian Tan
BACKGROUND: Thyroid disorders are common during pregnancy. To date, a limited number of studies have reported differences in serum thyroid hormone concentrations between different ethnic groups. We sought to establish gestational age-specific reference intervals for serum levels of thyroid hormones in a multi-ethnic population and investigate whether separate reference intervals should be used for different ethnic groups. METHODS: A total of 926 pregnant women from multiple ethnic groups attended four separate study visits spanning the three trimesters...
April 10, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28389458/probable-interaction-between-levothyroxine-and-ritonavir-case-report-and-literature-review
#8
Rahul Sahajpal, Rabia A Ahmed, Christine A Hughes, Michelle M Foisy
PURPOSE: A case of probable interaction of levothyroxine and ritonavir is presented along with a review of the relevant literature and recommendations on clinical management. SUMMARY: A 37-year-old woman with human immunodeficiency virus infection who had recently undergone thyroidectomy for a benign multinodular goiter presented to a clinic with hypothyroidism (she was also found to be pregnant), and treatment with levothyroxine 75 μg daily was initiated. While receiving antiretroviral therapy (abacavir-lamivudine and lopinavir-ritonavir) during pregnancy, the patient had persistently elevated serum thyroid-stimulating hormone (TSH) concentrations (up to 125...
April 15, 2017: American Journal of Health-system Pharmacy: AJHP
https://www.readbyqxmd.com/read/28379180/eliminating-iodine-deficiency-in-china-achievements-challenges-and-global-implications
#9
Dianjun Sun, Karen Codling, Suying Chang, Shubin Zhang, Hongmei Shen, Xiaohui Su, Zupei Chen, Robert W Scherpbier, Jun Yan
The prevention of iodine deficiency through salt iodization has been recognized as a global success story, and China stands at the forefront of this achievement with one of the most successful programs in the world. High level political commitment, national mandatory legislation, a state-managed edible salt industry and a complex and highly sophisticated surveillance system have facilitated the success of the program. Challenges have arisen however, including: (i) concern that adequate iodine status in pregnant women cannot be achieved without causing above adequate iodine intakes in children; (ii) declining iodine intake as a result of reductions in salt consumption and increased consumption of processed foods, which may not be made with iodized salt; (iii) the existence of areas with high iodine content in the water; and (iv) declines in household use of iodized salt due to concerns about excess iodine intake and thyroid disease...
April 5, 2017: Nutrients
https://www.readbyqxmd.com/read/28371633/ovarian-torsion-and-spontaneous-ovarian-hyperstimulation-syndrome-in-a-twin-pregnancy-a-case-report
#10
Núria Gil Navarro, Emma Garcia Grau, Sílvia Pina Pérez, Laia Ribot Luna
INTRODUCTION: Ovarian hyperstimulation syndrome (OHSS) is extremely rare in spontaneous pregnancies. Spontaneous OHSS can result from glycoprotein hormones stimulating follicle-stimulating hormone receptors (FSHR). PRESENTATION OF CASE: We report a twin pregnancy in which ovarian torsion and hemoperitoneum complicating OHSS were treated with left adnexectomy and aspiration. The only trigger for spontaneous OHSS in this case was high levels of chorionic gonadotropin hormone...
2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28369636/maternal-fenvalerate-exposure-induces-fetal-intrauterine-growth-restriction-through-disrupting-placental-thyroid-hormone-receptor-signaling
#11
Bo Wang, Ji-Jie Liu, Yan Wang, Lin Fu, Ru Shen, Zhen Yu, Hua Wang, Yuan-Hua Chen, Cheng Zhang, Xiu-Hong Meng, De-Xiang Xu
Fenvalerate is an environmental endocrine disruptor that disrupts testosterone and estradiol synthesis. Nevertheless, whether fenvalerate disturbs placental TR signaling remains unclear. The aim of this study was to investigate whether maternal fenvalerate exposure causes fetal intrauterine growth restriction (IUGR) and to explore the role of placental thyroid hormone receptor (TR) signaling. Pregnant mice except controls were orally administered to fenvalerate (0.2, 2.0 or 20 mg/kg) daily throughout pregnancy...
March 23, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28361687/pintnet-construction-of-condition-specific-pathway-interaction-network-by-computing-shortest-paths-on-weighted-ppi
#12
Ji Hwan Moon, Sangsoo Lim, Kyuri Jo, Sangseon Lee, Seokjun Seo, Sun Kim
BACKGROUND: Identifying perturbed pathways in a given condition is crucial in understanding biological phenomena. In addition to identifying perturbed pathways individually, pathway analysis should consider interactions among pathways. Currently available pathway interaction prediction methods are based on the existence of overlapping genes between pathways, protein-protein interaction (PPI) or functional similarities. However, these approaches just consider the pathways as a set of genes, thus they do not take account of topological features...
March 14, 2017: BMC Systems Biology
https://www.readbyqxmd.com/read/28359096/early-maternal-thyroid-function-during-gestation-is-associated-with-fetal-growth-particularly-in-male-newborns
#13
Tanja G M Vrijkotte, E Jessica Hrudey, Marcel B Twickler
Background: Intrauterine growth patterns are influenced by maternal thyroid function during gestation and by fetal sex. It is unknown, however, whether the relationships between maternal thyrotropin (TSH) and free thyroxine (fT4) levels in early pregnancy and fetal growth outcomes are modified by fetal sex. Design: Data were obtained from a community-based cohort study of pregnant women living in Amsterdam (Amsterdam Born Children and Their Development study). TSH and fT4 levels were determined during the first prenatal screening at median 13 weeks (interquartile range, 12 to 14)...
March 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28358234/iodine-storage-and-metabolism-of-mild-to-moderate-iodine-deficient-pregnant-rats
#14
Xin Sun, Li Lu, Ling Shan, Zhongyan Shan, Weiping Teng
BACKGROUND: Severe iodine deficiency during pregnancy results in neurodevelopmental disorders in children, while the consequences of mild to moderate iodine deficiency (MMID) are uncertain. The concentration of iodine in thyroid is the most accurate indicator of iodine nutrition. This paper is aimed to investigate that whether the iodine storage in thyroid is enough for mother and fetus during iodine sufficient and MMID conditions by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS)...
March 30, 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/28351085/thyroid-function-and-metabolic-syndrome-a-population-based-thyroid-study
#15
Ladan Mehran, Atieh Amouzegar, Parnian Kheirkhah Rahimabad, Maryam Tohidi, Zhale Tahmasebinejad, Fereidoun Azizi
The impact of thyroid dysfunction in subclinical ranges on metabolic syndrome (MetS) is not well known. The aim of the present study is to evaluate the association of thyroid dysfunction with MetS and its components. In the cross-sectional population-based Tehran Thyroid Study, out of 5 786 randomly selected participants, aged≥20 years, subjects with thyroid nodules and cancer or any severe systemic disease, those who were pregnant and those using thyroid medication were excluded, leaving 5 422 subjects to be investigated...
March 2017: Hormone and Metabolic Research, Hormon- und Stoffwechselforschung, Hormones et Métabolisme
https://www.readbyqxmd.com/read/28348022/increase-in-thyroglobulin-antibody-and-thyroid-peroxidase-antibody-levels-but-not-preterm-birth-rate-in-pregnant-danish-women-upon-iodine-fortification
#16
Sofie Bliddal, Malene Boas, Linda Hilsted, Lennart Friis-Hansen, Anders Juul, Torben Larsen, Ann Tabor, Jens Faber, Dorthe Hansen Precht, Ulla Feldt-Rasmussen
OBJECTIVE: The presence of thyroid antibodies in pregnancy has been associated with preterm birth. In the non-pregnant population, the implementation of the Danish iodine fortification program has increased the prevalence of thyroid antibodies. This study investigated the prevalence of thyroid peroxidase antibodies (TPOAbs) and thyroglobulin antibodies (TgAbs) in pregnant Danish women before, during and after implementation of the iodine fortification program and association with preterm birth...
May 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28346766/maternal-thyroid-parameters-in-pregnant-women-with-different-ethnic-backgrounds-do-ethnicity-specific-reference-ranges-improve-the-diagnosis-of-subclinical-hypothyroidism
#17
Flora Veltri, Julie Belhomme, Pierre Kleynen, Lidia Grabczan, Serge Rozenberg, Thierry Pepersack, Kris Poppe
OBJECTIVE: Guidelines on the management of thyroid dysfunction during pregnancy have recently been updated and, for the diagnosis of subclinical hypothyroidism (SCH), a thyroid-stimulating hormone (TSH) upper reference limit (cut-off) of 4.0 mIU/L has been proposed when no institutional values are available. It is also suggested that serum TSH and thyroid autoimmunity (TAI) may be different according to the ethnic background of the women. We therefore determined the prevalence of TAI and SCH in pregnant women with different ethnic backgrounds and, to define SCH, we used different first trimester TSH upper reference cut-offs (institutional, ethnicity-specific, 2...
March 27, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28327186/clinical-behavioural-and-pharmacogenomic-factors-influencing-the-response-to-levothyroxine-therapy-in-patients-with-primary-hypothyroidism-protocol-for-a-systematic-review
#18
Rosie Dew, Onyebuchi Okosieme, Colin Dayan, Vinay Eligar, Ishrat Khan, Salman Razvi, Simon Pearce, Scott Wilkes
BACKGROUND: Suboptimal thyroid hormone therapy including under-replacement and over-replacement is common amongst patients with hypothyroidism. This is a significant health concern as affected patients are at risk of adverse cardiovascular or metabolic consequences. Despite a growing body of evidence on the effects of various factors on thyroid hormone replacement, a systematic appraisal of the evidence is lacking. This review aims to appraise and quantify the extent to which clinical, behavioural and pharmacogenomic factors affect levothyroxine therapy in patients with primary hypothyroidism...
March 21, 2017: Systematic Reviews
https://www.readbyqxmd.com/read/28323629/effects-of-levothyroxine-on-pregnancy-outcomes-in-women-with-thyroid-dysfunction-a-meta-analysis-of-randomized-controlled-trials
#19
Jia Li, Jie Shen, Lan Qin
Context • Subclinical hypothyroidism (SCH) in pregnancy can be associated with increased complications in pregnant women and neurocognitive deficits in fetuses. Two recently published meta-analyses investigated the effects of levothyroxine (LT4) supplementation on pregnancy outcomes but did not report adverse complications and neonatal outcomes. Objectives • The study intended to assess the effects of LT4 supplementation in the treatment of pregnant women with thyroid dysfunction. Design • The research team performed a meta-analysis of randomized controlled trials (RCTs) published in PubMed, Embase, Web of Science, Chinese BioMedical Literature Service System, and China National Knowledge Infrastructure databases...
March 2017: Alternative Therapies in Health and Medicine
https://www.readbyqxmd.com/read/28322679/iodine-deficiency-clinical-implications
#20
REVIEW
Soamsiri Niwattisaiwong, Kenneth D Burman, Melissa Li-Ng
Iodine is crucial for thyroid hormone synthesis and fetal neurodevelopment. Major dietary sources of iodine in the United States are dairy products and iodized salt. Potential consequences of iodine deficiency are goiter, hypothyroidism, cretinism, and impaired cognitive development. Although iodine status in the United States is considered sufficient at the population level, intake varies widely across the population, and the percentage of women of childbearing age with iodine deficiency is increasing. Physicians should be aware of the risks of iodine deficiency and the indications for iodine supplementation, especially in women who are pregnant or lactating...
March 2017: Cleveland Clinic Journal of Medicine
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