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Iodine deficiency

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https://www.readbyqxmd.com/read/28727455/electron-deficient-chiral-lactic-acid-based-hypervalent-iodine-reagents
#1
Jihan Qurban, Mohamed Elsherbini, Thomas Wirth
Novel electron-deficient chiral hypervalent iodine reagents were prepared in good overall yields. The reactivity and stereoselectivity of these reagents in oxidative rearrangements of alkenes to α-aryl ketones was investigated. The results show that the new reagents have good reactivity and generate products with high enantiomeric excess.
July 20, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28720593/vitamin-a-endocrine-tissues-and-hormones-interplay-and-interactions
#2
Julie Brossaud, Veronique Pallet, Jean-Benoit Corcuff
Vitamin A (retinol) is a micronutrient critical for cell proliferation and differentiation. In adults, vitamin A and metabolites such as retinoic acid (RA) play major roles in vision, immune and brain functions, and tissue remodelling and metabolism. This review presents the physiological interactions of retinoids and endocrine tissues and hormonal systems. Two endocrine systems have been particularly studied. In the pituitary, retinoids targets the corticotrophs with a possible therapeutic use in corticotropinomas...
July 18, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/28694389/are-lower-tsh-cutoffs-in-neonatal-screening-for-congenital-hypothyroidism-warranted-a-debate
#3
Samantha Lain, Caroline Trumpff, Scott D Grosse, Antonella Olivieri, Guy Van Vliet
When newborn screening (NBS) for congenital hypothyroidism (CH) using thyroid stimulating hormone (TSH) as a primary screening test was introduced, typical TSH screening cutoffs were 20 to 50 mU/L of whole blood. Over the years, lowering of TSH cutoffs has contributed to an increased prevalence of detected CH. However, a consensus on the benefit deriving from lowering TSH cutoffs at screening is lacking. The present paper outlines arguments both for and against the lowering of TSH cutoffs at NBS. It includes a review of recently published evidence from Australia, Belgium, and Italy...
July 10, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28682645/are-low-intakes-and-deficiencies-in-iron-vitamin-a-zinc-and-iodine-of-public-health-concern-in-ethiopian-kenyan-nigerian-and-south-african-children-and-adolescents
#4
Rajwinder Harika, Mieke Faber, Folake Samuel, Afework Mulugeta, Judith Kimiywe, Ans Eilander
OBJECTIVE: To perform a systematic review to evaluate iron, vitamin A, zinc, and iodine status and intakes in children and adolescents (0-19 years) in Ethiopia, Kenya, Nigeria, and South Africa. METHOD: Both national and subnational data published from the year 2005 to 2015 were searched via MEDLINE, Scopus, and national public health websites. For each micronutrient and country, status data from relevant studies and surveys were combined into an average prevalence and weighted by sample size (WAVG)...
January 1, 2017: Food and Nutrition Bulletin
https://www.readbyqxmd.com/read/28673593/boron-a-potential-goiterogen
#5
Elizaveta V Popova, Alexey A Tinkov, Olga P Ajsuvakova, Margarita G Skalnaya, Anatoly V Skalny
The iodine deficiency disorders (IDD) include a variety of disturbances such as decreased fertility, increased perinatal and infant mortality, impaired physical and intellectual development, mental retardation, cretinism, hypothyroidism, and endemic goiter (EG). The occurrence of the latter is determined by interplay between genetic and environmental factors. The major environmental factor is iodine status that is required for normal thyroid hormone synthesis. However, other factors like intake of micronutrients and goiterogens also have a significant impact...
July 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28670556/iodine-deficiency-an-under-recognized-problem
#6
Sudha Rathna Prabhu, Subramanian Kannan, Shriraam Mahadevan
No abstract text is available yet for this article.
July 2017: Indian Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28670190/newborn-screening-for-thyroid-stimulating-hormone-as-an-indicator-for-assessment-of-iodine-status-in-the-republic-of-macedonia
#7
Violeta Anastasovska, Mirjana Kocova
BACKGROUND: Iodine deficiency is associated with goiter and impaired brain function leading to cretinism. An increased frequency of thyroid-stimulating hormone (TSH) measurements above 5 mlU/L on newborn screening points toward an impaired iodine status of the population. METHODS: A 13-year retrospective analysis was performed in 228,266 newborns participating in the national thyroid newborn screening program. The TSH concentration was measured in dry blood spots collected by heel stick on filter paper, 48 hours after birth, using fluoroimmunometric DELFIA method...
October 2016: Journal of Medical Biochemistry
https://www.readbyqxmd.com/read/28658293/green-design-of-a-paper-test-card-for-urinary-iodine-analysis
#8
Nicholas M Myers, Ivan C Leung, Sean W McGee, Kathleen Eggleson, Marya Lieberman
When young children do not receive adequate amounts of the micronutrient iodine in their diet, their growth and cognitive development can be impaired. Nearly every country in the world has programs in place to track iodine intake and provide supplemental iodine if needed, usually in the form of fortified salt. The iodine nutrition status of a population can be tracked by monitoring iodine levels in urine samples to see if the median value falls in the range of 100-300 micrograms of iodine per liter of urine (μg I/L), which indicates adequate or more than adequate iodine nutrition...
2017: PloS One
https://www.readbyqxmd.com/read/28657479/first-israeli-national-iodine-survey-demonstrates-iodine-deficiency-among-school-aged-children-and-pregnant-women
#9
Yaniv S Ovadia, Jonathan Arbelle, Dov Gefel, H Brik, Tamar Wolf, Varda Nadler, Sandra Hunziker, Michael Zimmermann, Aron Troen
INTRODUCTION: National data on iodine status in Israel is lacking. Reliance on iodine-depleted desalinated water, the absence of a salt iodization program and reports of increased use of thyroid medication in Israel suggested that the population's iodine intake is likely inadequate. AIMS: To determine iodine status of Israeli school age children (SAC) and pregnant women (PW) in a nationally-representative sample obtained by a novel approach of using pre-discard urinalysis samples collected from a centralized national laboratory...
June 28, 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/28640139/a-prisma-compliant-systematic-review-and-meta-analysis-of-the-relationship-between-thyroid-disease-and-different-levels-of-iodine-intake-in-mainland-china
#10
REVIEW
Wanwen Weng, Mengjie Dong, Jun Zhan, Jun Yang, Bo Zhang, Xingdong Zhao
BACKGROUND: Low-iodine intake has historically been an issue in China, causing widespread iodine deficiency diseases (IDD). China started to introduce universal salt iodization in 1995, but reports of increased thyroid disease are a concern and appropriate levels of iodine intake must be considered. OBJECTIVE: To assess the prevalence of thyroid disease with different urinary iodine concentrations (UICs) in the general population of those residing in mainland China...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28638624/kikuchi-fujimoto-disease-a-case-report-of-a-multi-drug-resistant-grueling-disease
#11
Alexey Youssef, Rahaf Ali, Kinan Ali, Zuheir AlShehabi
Histiocytic necrotizing lymphadenitis or Kikuchi-Fujimoto disease (KFD) is characterized by its rare occurrence. Mostly prevalent among Asian women, KFD manifests with lymphadenopathy-affecting mostly cervical and rarely generalized or retroperitoneal regions-in addition to fever. It is a self-limited disease that resolves within 1-4 months, responding remarkably to glucocorticosteroids or hydroxychloroquine. However, some rare cases prove to be unresponsive to the previously mentioned therapies. Here is a description of a case of KFD affecting a 67-year-old Syrian woman with a history of hypothyroidism due to iodine-deficiency...
June 2017: Oxford Medical Case Reports
https://www.readbyqxmd.com/read/28633507/digenic-duox1-and-duox2-mutations-in-cases-with-congenital-hypothyroidism
#12
Zehra Aycan, Hakan Cangul, Marina Muzza, Veysel N Bas, Laura Fugazzola, V Krishna Chatterjee, Luca Persani, Nadia Schoenmakers
Context: The DUOX2 enzyme generates hydrogen peroxide (H2O2), a crucial electron acceptor for the TPO-catalyzed iodination and coupling reactions mediating thyroid hormone biosynthesis. DUOX2 mutations result in dyshormonogenetic Congenital Hypothyroidism (CH) which may be phenotypically heterogeneous, leading to the hypothesis that CH severity may be influenced by environmental factors (eg dietary iodine) and oligogenic modifiers (eg variants in the homologous NADPH-oxidase DUOX1). However, loss of function mutations in DUOX1 have not hitherto been described and its role in thyroid biology remains undefined...
June 16, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28627816/spectrophotometric-determination-of-selenium-through-triiodide-anion
#13
Otilia Bizerea-Spiridon, Radu Nartita, Alexandru F Rogobete, Adina Negrea, Ramona Stroescu, Teofana O Bizerea, Constantin Ilie, Otilia Marginean
BACKGROUND: Selenium is a chemical element found in the human body that plays a crucial role in its regulation. Depending on the concentration, it may have beneficial or have toxic effects. Selenium is incorporated as selenocysteine amino acid residue in selenoproteins which play an important role in many biological functions: anti-oxidant defense, regulation of the immune function and of the inflammatory response, metabolism of thyroid hormones, functioning of the central nervous system, biosynthesis of DNA and RNA, fertility, and reproduction...
May 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28627204/iodine-levels-are-associated-with-oxidative-stress-and-antioxidant-status-in-pregnant-women-with-hypertensive-disease
#14
Sergio Cuellar-Rufino, Mónica Navarro-Meza, Pablo García-Solís, Irene Xochihua-Rosas, Omar Arroyo-Helguera
BACKGROUND: The antioxidant function of iodine and iodine deficiency as a risk factor of preeclampsia have been previously reported. AIM: To analyze the association between iodine deficiency, oxidative stress and antioxidant status with hypertensive disease of pregnancy (HPD). METHOD: Fifty-seven pregnant women were recruited in the last trimester of pregnancy; 20 were diagnosed with hypertensive disease (HPD) of pregnancy and 37 were normotensive pregnant women...
June 5, 2017: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/28627193/-menus-offered-in-long-term-care-homes-quality-of-meal-service-and-nutritional-analysis
#15
Ana Isabel Rodríguez Rejón, María Dolores Ruiz López, Vincenzo Malafarina, Antonio Puerta, Antonia Zuñiga, Reyes Artacho
BACKGROUND: Institutionalization is a risk factor for malnutrition. Low energy intake and/or nutrient deficiencies are considered to be the main causes. OBJECTIVE: To evaluate the quality of meals and meal service as well as the nutritional value of the main menus (regular menu, menu for diabetics, and pureed menu) offered in three long-term care (LTC) homes located in the metropolitan area of Granada (Spain). METHODS: Cross-sectional study...
June 5, 2017: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/28622483/human-milk-fortifiers-do-not-meet-the-current-recommendation-for-nutrients-in-very-low-birth-weight-infants
#16
Winston Koo, Hilary Tice
BACKGROUND: Use of multinutrient fortifiers is standard of care for small preterm infants fed exclusively human milk. However, adequacy of human milk fortifiers (HMFs) to meet the recommended intake for macronutrients and micronutrients is now known. MATERIALS AND METHODS: Nutrient content of human milk fortified according to manufacturer's recommendations was compared at isocaloric levels for 1 human milk-based (HMF-A), 2 bovine milk protein-based (HMF-B, HMF-C), and 2 preterm infant formulas (PTF-B, PTF-C)...
June 1, 2017: JPEN. Journal of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28621126/identification-of-organic-iodine-compounds-and-their-transformation-products-in-edible-iodized-salt-using-liquid-chromatography-high-resolution-mass-spectrometry
#17
Lifen Yun, Yue'e Peng, Qing Chang, Qingxin Zhu, Wei Guo, Yanxin Wang
The consumption of edible iodized salt is a key strategy to control and eliminate iodine deficiency disorders worldwide. We herein report the identification of the organic iodine compounds present in different edible iodized salt products using liquid chromatography combined with high resolution mass spectrometry. A total of 38 organic iodine compounds and their transformation products (TPs) were identified in seaweed iodine salt from China. Our experiments confirmed that the TPs were generated by the replacement of I atoms from organic iodine compounds with Cl atoms...
July 5, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28620499/intrauterine-death-following-intraamniotic-triiodothyronine-and-thyroxine-therapy-for-fetal-goitrous-hypothyroidism-associated-with-polyhydramnios-and-caused-by-a-thyroglobulin-mutation
#18
Pradeep Vasudevan, Corrina Powell, Adeline K Nicholas, Ian Scudamore, James Greening, Soo-Mi Park, Nadia Schoenmakers
In the absence of maternal thyroid disease or iodine deficiency, fetal goitre is rare and usually attributable to dyshormonogenesis, for which genetic ascertainment is not always undertaken in the UK. Mechanical complications include tracheal and oesophageal compression with resultant polyhydramnios, malpresentation at delivery and neonatal respiratory distress. We report an Indian kindred in which the proband (first-born son) had congenital hypothyroidism (CH) without obvious neonatal goitre. His mother's second pregnancy was complicated by fetal hypothyroid goitre and polyhydramnios, prompting amniotic fluid drainage and intraamniotic therapy (with liothyronine, T3 and levothyroxine, T4)...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28620494/endemic-goitre-and-hypothyroidism-in-an-adult-female-patient-dependent-on-total-parenteral-nutrition
#19
S Pearson, C Donnellan, L Turner, E Noble, K Seejore, R D Murray
We present the case of a thirty-year-old female patient who was referred to the endocrinology team with an enlarging goitre and biochemical hypothyroidism. She had been dependent on total parenteral nutrition for the previous six years as a result of intestinal failure thought to be caused by possible underlying mitochondrial disease. The patient also suffers from a Desmin myopathy, and at present, the exact aetiology behind her intestinal failure is not certain. The goitre was smooth and had been enlarging slowly over the previous few months...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28615379/daily-consumption-of-lipid-based-nutrient-supplements-containing-250-%C3%AE-g-iodine-does-not-increase-urinary-iodine-concentrations-in-pregnant-and-postpartum-women-in-bangladesh
#20
Malay K Mridha, Susana L Matias, Rina Rani Paul, Sohrab Hussain, Md Showkat Ali Khan, Zakia Siddiqui, Barkat Ullah, Mostofa Sarker, Mokbul Hossain, Rebecca T Young, Charles D Arnold, Kathryn G Dewey
Background: Maternal iodine deficiency during pregnancy and lactation is common in Bangladesh.Objective: We evaluated the effect of lipid-based nutrient supplements for pregnant and lactating women (LNS-PL) on urinary iodine concentration (UIC).Methods: We conducted a cluster-randomized controlled effectiveness trial in which we enrolled 4011 pregnant women at ≤20 gestational weeks. Women in 48 clusters received iron and folic acid (IFA; 60 mg Fe/d + 400 μg folic acid/d) and women in 16 clusters received LNS-PL (20 g/d, 118 kcal) containing 22 vitamins and minerals (including 250 μg I)...
June 14, 2017: Journal of Nutrition
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