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TSH AND Iodine

Yi Pang, Yunfeng Guan, Xing Jin, Hongmei Shen, Lixiang Liu, Qingzhen Jia, Fangang Meng, Xiaoye Zhang
Thyroid-stimulating hormone (TSH) is secreted by the pituitary gland and promotes thyroid growth and function, with increased TSH levels typically associated with hypothyroidism. By consulting the literature, we found that the TSHR, PAX8, and PDE4B genes are associated with thyroid function. Recently, copy number variations (CNVs) have been used as genetic markers to investigate inter-individual variation. Therefore, we investigated the relationship between the TSHR, PAX8, and PDE4B gene CNVs and TSH abnormalities, by calculating variations in gene copy number...
March 15, 2018: Biological Trace Element Research
Xue Liang, Yanni Feng, Laixiang Lin, Iruni Roshanie Abeysekera, Umar Iqbal, Tingting Wang, Ying Wang, Xiaomei Yao
OBJECTIVE: Our aim was to investigate thyroid function alterations attributed to high iodide supplementation in maternal rats and their offspring. METHODS: Depending on their iodide intake, the pregnant rats were randomly divided into three groups: normal iodide intake (NI), 10 times high iodide intake (10 HI) and 100 times high iodide intake (100 HI) groups. Iodine concentration in the urine and maternal milk; iodine content and mitochondrial superoxide production; expression of TRα1, TRβ1, NIS and Dio1 in both the thyroid and mammary glands were all measured...
May 2018: Journal of Trace Elements in Medicine and Biology
Lili Fan, Long Tan, Yanting Chen, Cong Du, Mei Zhu, Kunling Wang, Hongyan Wei, Wei Wang, Min Gao, Yixin Zhang, Tingkai Cui, Wen Chen, Jun Shen, Wanqi Zhang
Studies have shown that prevalence of thyroid nodules (TNs) has been increasing recently. However, the factors that may influence TN prevalence is not fully understood. In this study, we aimed to understand the prevalence of TNs and identify possible factors that are associated with the prevalence of TNs in Tianjin, China. Subjects aged 18 years or older were randomly collected and all subjects received thyroid ultrasonography, physical examination and questionnaires. Subjects (n = 2647) were divided into the case group in which the subjects had TNs and the control group in which the subjects did not have TNs...
March 8, 2018: Journal of Trace Elements in Medicine and Biology
Subhodip Pramanik, Sujoy Ghosh, Pradip Mukhopadhyay, Rana Bhattacharjee, Bidisha Mukherjee, Samim Ali Mondal, Ipsita Ghosh, Ranajit Bari, Subhankar Chowdhury
Objective: Type 2 diabetes mellitus and thyroid dysfunction (TD) are two major public health endocrine problem, but the prevalence of TD and iodine status in patients with T2 DM in India is less studied. The study objective was to explore the prevalence of TD and to evaluate iodine health in type 2 diabetes patients attending a tertiary care center in Eastern India. Methods: Consecutive 100 patients with diabetes attending outpatient department were evaluated clinically and biochemically (thyrotropin [TSH], free thyroxine, anti-TPO antibody, and urinary iodine)...
January 2018: Indian Journal of Endocrinology and Metabolism
Subramanian Kannan, Shriraam Mahadevan, Alben Sigamani
Background: Small cross-sectional studies are published on the trimester-specific normal ranges of thyrotropin and thyroxine levels in Indian women from various parts of the country. Objective: We sought to review the published literature on thyroid function tests in normal pregnant Indian women to see if the pooled data from various studies can define normative data and hypothyroidism in pregnancy. Methods: We retrieved 56 studies from online databases with detailed search using multiple search terms...
January 2018: Indian Journal of Endocrinology and Metabolism
Jeonghoon Ha, Jeongmin Lee, Kwanhoon Jo, Dong Jun Lim, Moo Il Kang, Bong Yun Cha, Min Hee Kim
OBJECTIVE: To investigate the prevalence of subclinical hypothyroidism (SCH) in Korean adults and identify the risk factors for the occurrence of SCH by sex. DESIGN AND METHODS: This study used data from KNHANES VI, a cross-sectional, nationally representative survey, which comprises a health interview survey, a health examination survey, and a nutrition survey. To examine SCH, the thyroid-stimulating hormone (TSH) reference range was defined using both the range provided by the test kit manufacturer (SCH-M) and a population-based range (SCH-P)...
March 7, 2018: Endocrine Connections
Fatema Alzahraa Almohamad, Tareq Ahmad, Basel Ahmad, Khalid Hussain, Lama Hadid, Majdi Zein, Mohamad Ahmad
Iodine has always been connected to thyroid gland, and the fact that thyroid tissue traps, organificates and stores iodine more than other tissues is well known, hence the use of radioiodine as a diagnostic and therapeutic tool for thyroid disorders. However, false-positive cases do occur. We present a case of a 34-year-old patient who underwent total thyroidectomy for papillary carcinoma. Results of follow up TSH, thyroglobulin and thyroglobulin antibody tests after surgery lead to two rounds of radioactive iodine...
February 2018: Journal of Surgical Case Reports
E S Barysheva
The effects of essential (I, Se, and Zn) and toxic (Pb and Cd) trace elements on the thyroid function were studied experimentally. The protective effects of iodine, zinc, and selenium on thyroid tissue and antithyroid effects of toxic trace elements promoting a decrease in the levels of thyroid hormones (T3 , T4 ) and imbalance of pituitary hormones (TSH) were detected. Addition of toxic trace elements to the ration of experimental rats led to their accumulation in the thyroid (0.051 μg/g Pb and 0.190 μg/g Cd)...
March 2, 2018: Bulletin of Experimental Biology and Medicine
Agathocles Tsatsoulis
Thyroid follicular cells, as well as adrenocortical cells, are endowed by an intrinsic heterogeneity regarding their growth potential, in response to various stimuli. This heterogeneity appears to constitute the underlying cause for the focal cell hyperplasia and eventually the formation of thyroid and adrenal nodules, under the influence of growth stimulatory factors. Among the main stimulatory factors are the pituitary tropic hormones, thyroid-stimulating hormone (TSH) or thyrotropin and adrenocorticotropic hormone (ACTH), which regulate the growth and function of their respective target cells, and the insulin/insulin-like growth factor system, that, through its mitogenic effects, can stimulate the proliferation of these cells...
February 26, 2018: Journal of Clinical Medicine
Franz Maximilian Rasche, Ronny Rettig, Thomas Frese, Wilma Gertrud Rasche, Filip Barinka, Guenter Roesl, Frieder Keller, Tom H Lindner, Jochen G Schneider, Joachim Beige, Thomas Ebert, Stephan Schiekofer
INTRODUCTION: Endocrine disorders of the pituitary axes are frequent in patients with hemodialysis (CKD5D). The aim of this multicenter study (Leipzig (L), Quedlinburg and Blankenburg in the Harz region (Hz)) in CKD5D patients was to evaluate influences of CKD5D related factors, morphological and biochemical parameters, and serum iodine and prolactin concentrations on the pituitary-thyroid axis. PATIENTS AND METHODS: 170 patients (L n=58; Hz n=112) were included in this prospective, non-interventional, cross-sectional study...
February 23, 2018: Experimental and Clinical Endocrinology & Diabetes
Yukio Ochi, Takashi Hachiya, Yukiko Koyama, Nobutoshi Fukuhori, Noriyuki Ashida
The effect of antithyroid drugs(ATDs)[methylmercaptoimidazole (MMI) and propylthiouracil (PTU)] and reducing agents (mercaptoethanol, dithiothreitol and cysteine) on bovine (b) TSH binding to human (h) and porcine (p) TSH receptor (R) was examined. (1) ATDs was pre-incubated with hTSHR coated tube for 1- 4 h, washed free of ATDs, and then 125I-bTSH binding to hTSHR after 1 h incubation was examined. MMI (10-40 mM) decreased 125I-bTSH binding in a dose-dependent manner and binding decreased proportionally as pre-incubation time increased from 1 to 4 h...
February 19, 2018: Endocrine, Metabolic & Immune Disorders Drug Targets
Rohan K Henry, Monika Chaudhari
BACKGROUND: Amiodarone-induced thyrotoxicosis (AIT) type 2, characterized as a destructive thyroiditis, is well described in the medical literature; however, iodine-induced thyrotoxicosis (IIT) is not, though the latter has similar features and can be managed similarly. CASE PRESENTATION: We present a 17-year-old female who presented with a history of an intermittent goiter with thyroid function tests (TFTs): thyroid-stimulating hormone (TSH)<0.015 (0.4-4 μU/mL), free thyroxine (T4)≥6 (0...
February 21, 2018: Journal of Pediatric Endocrinology & Metabolism: JPEM
Paweł Paśko, Krzysztof Okoń, Mirosław Krośniak, Ewelina Prochownik, Paweł Żmudzki, Jadwiga Kryczyk-Kozioł, Paweł Zagrodzki
Rutabaga sprouts belong to the Brassicaceae family and may exert a negative influence on thyroid function, because they are a rich in glucosinolates. These sprouts are also valuable source of iodine (6.5 ± 0.6 μg/100 g of fresh weight). Sprouts were tested in a long-term experiment with young male rats as an element of their diet, combined with two models of hypothyroidism, the first - deficit of iodine and the second - sulfadimethoxine ingestion as a pharmacological agent caused inhibition of thyroid peroxidase...
March 2018: Journal of Trace Elements in Medicine and Biology
Seyit Ahmet Ucakturk, Murat Alışık, Çagatay Ugur, Selin Elmaogullari, Eda Mengen, Özcan Erel
<br>To evaluate the thiol/disulphide homeostasis in children with non-autoimmune subclinical hypothyroidism. <br> Materials (Subjects) and Methods<br>Thiol-disulphide homeostasis [native thiol-disulphide exchanges (native thiol (SH), disulphide (SS), and total thiol (SS+SH))] was evaluated in 60 children and adolescents who were negative for thyroid auto-antibodies (anti-thyroid peroxidase, anti-thyroglobulin) and had a TSH value higher than 5 mIU/L and in 40 sex- and age-matched healthy control subjects who were negative for thyroid auto-antibodies and had normal TSH levels...
January 25, 2018: Medical Principles and Practice: International Journal of the Kuwait University, Health Science Centre
So Young Park, Hae In Kim, Hyun-Kyung Oh, Tae Hyuk Kim, Hye Won Jang, Jae Hoon Chung, Myung-Hee Shin, Sun Wook Kim
BACKGROUND: Establishment of the reference interval of thyroid-stimulating hormone (TSH) is critical in the diagnosis of thyroid dysfunction and is affected by age, gender, iodine nutrition, and ethnicity. The aim of this study was to determine the reference intervals of TSH and free thyroxin (FT4) from a large, nationwide data of Korea where iodine intake is more than adequate. METHODS: We analyzed data from the Korea National Health and Nutrition Examination Survey VI that measured serum TSH, FT4, and thyroid peroxidase antibody from 7,061 individuals (urinary iodine measurement in 6,565)...
2018: PloS One
Sandra M McLachlan, Holly A Aliesky, Basil Rapoport
We investigated factors underlying the varying effects of a high dietary iodide intake on serum T4 levels in a wide spectrum of mouse strains, including thyroiditis-susceptible NOD.H2h4, NOD.H2k, and NOD mice, as well as other strains (BALB/c, C57BL/6, NOD.Lc7, and B10.A4R) not previously investigated. Mice were maintained for up to 8 months on control or iodide-supplemented water (NaI 0.05%). On iodized water, serum T4 was reduced in BALB/c (males and females) in association with colloid goiters but was not significantly changed in mice that developed thyroiditis, namely NOD...
January 1, 2018: Journal of the Endocrine Society
Bin Song, Zhihua Zuo, Juan Tan, Jianjin Guo, Weiping Teng, Yibing Lu, Chao Liu
BACKGROUND: The association between thyroid nodules and adiposity remains controversial. We performed a cross-sectional, community-based study to examine whether thyroid nodules are associated with overweight and obesity, as defined with body mass index (BMI) and waist circumference. METHODS: The study included 1482 subjects (≥20 years of age; residing in Nanjing, China) receiving questionnaire interview, anthropometric measurements, laboratory tests and thyroid ultrasonography in 2009-2010...
January 27, 2018: BMC Endocrine Disorders
Xiaohan Zhang, Wenbin Chen, Shanshan Shao, Guowang Xu, Yongfeng Song, Chao Xu, Ling Gao, Chunxiu Hu, Jiajun Zhao
SCOPE: Increasing evidence has shown that the disturbance of lipid metabolism might make a possible contribution to the pathogenesis of organ dysfunction, including thyroid, yet it is unknown whether excess intake of dietary fat interferes in thyroid lipid profile. We investigated the effects of dietary fat towards the thyroid lipid profile and thyroid function. METHODS AND RESULTS: Male Sprague-Dawley rats were fed with high fat diet (HFD) rich in saturated and mono-unsaturated fatty acids or chow diet for 18 weeks...
January 23, 2018: Molecular Nutrition & Food Research
R Tozzoli, F D'Aurizio, P Metus, A Steffan, C Mazzon, M Bagnasco
PURPOSE: Thyrotropin (TSH) is the most accurate marker of thyroid dysfunction in the absence of pituitary or hypothalamic disease. Studies on TSH reference intervals (RIs) showed wide inter-individual variability and prompted an intense debate about the best estimation of TSH RIs. DESIGN: We performed a population study on TSH RIs, using current data stored in the laboratory information system (LIS), at the Hospital Department of Laboratory Medicine, Pordenone (Italy), historically an area of mild-moderate iodine deficiency with a relatively high goiter prevalence...
January 16, 2018: Journal of Endocrinological Investigation
Sima Nazarpour, Fahimeh Ramezani Tehrani, Masoumeh Simbar, Sonia Minooee, Maryam Rahmati, Mohammad Ali Mansournia, Fereidoun Azizi
OBJECTIVE: Physiological gestational changes are associated with alterations in thyroid function which require different biochemical interpretation from that of non-pregnant women and necessitate established pregnancy-specific reference ranges. We aimed to identify the trimester-specific ranges of thyroid markers in a healthy population of pregnant Iranian women. METHODS: In this self-sequential study, data were extracted from The Tehran Thyroid and Pregnancy Study; a total of 314 women were tested during the 1st, 2nd and 3rd trimesters for serum levels of thyrotropin (TSH), thyroxine (T4), free thyroxine index (FT4I) and thyroid peroxidase antibody (TPOAb)...
March 2018: Clinical Biochemistry
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