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https://www.readbyqxmd.com/read/28336316/effects-of-age-and-soybean-isoflavones-on-hepatic-cholesterol-metabolism-and-thyroid-hormone-availability-in-acyclic-female-rats
#1
Branka Šošić-Jurjević, Dieter Lütjohann, Ivana Jarić, Marko Miler, Danijela Vojnović Milutinović, Branko Filipović, Vladimir Ajdžanović, Kostja Renko, Eva Katrin Wirth, Snežana Janković, Josef Kӧhrle, Verica Milošević
Soy-food and its isoflavones, genistein (G) and daidzein (D), were reported to exert mild cholesterol-lowering effect, but the underlying mechanism is still unclear. In this research, first we studied age-related alterations in hepatic cholesterol metabolism of acyclic middle-aged (MA) female rats. Then we tested if purified isoflavones may prevent or reverse these changes, and whether putative changes in hepatic thyroid hormone availability may be associated with this effect. Serum and hepatic total cholesterol (TChol), bile acid and cholesterol precursors, as well as serum TSH and T4 concentrations, hepatic deiodinase (Dio) 1 enzyme activity and MCT8 protein expression were determined by comparing data obtained for MA with young adult (YA) intact (IC) females...
March 20, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28333968/a-genome-wide-association-study-of-thyroid-stimulating-hormone-and-free-thyroxine-in-danish-children-and-adolescents
#2
Tenna Ruest Haarmark Nielsen, Emil Vincent Rosenbaum Appel, Mathilde Svendstrup, Johanne Dam Ohrt, Maria Dahl, Cilius Esmann Fonvig, Mette Hollensted, Christian Theil Have, Haja N Kadarmideen, Oluf Pedersen, Torben Hansen, Jens-Christian Holm, Niels Grarup
BACKGROUND: Hypothyroidism is associated with obesity, and thyroid hormones are involved in the regulation of body composition, including fat mass. Genome-wide association studies (GWAS) in adults have identified 19 and 6 loci associated with plasma concentrations of thyroid stimulating hormone (TSH) and free thyroxine (fT4), respectively. OBJECTIVE: This study aimed to identify and characterize genetic variants associated with circulating TSH and fT4 in Danish children and adolescents and to examine whether these variants associate with obesity...
2017: PloS One
https://www.readbyqxmd.com/read/28333900/-the-influence-of-hypothyroidism-on-the-conversion-and-binding-of-thyroid-hormones-in-patients-with-end-stage-renal-disease
#3
Iwanna Dubczak, Longin Niemczyk, Zbigniew Bartoszewicz, Katarzyna Szamotulska, Marek Saracyn, Stanisław Niemczyk
Hypothyroidism in patients with renal failure (RF) causes many metabolic and clinical problems, and both these diseases can mutually exacerbate their disturbances. AIM: The aim of this study was to evaluate the effect of hypothyroidism, and end-stage renal disease (ESRD) on conversion of thyroid hormones (TH) in patients with ESRD treated with chronic hemodialysis (HD). MATERIALS AND METHODS: The study was performed in 74 patients, including 41 women (K) and 33 men (M) aged 28-83 y...
March 21, 2017: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28333653/association-of-transient-hyperthyroidism-and-severity-of-hyperemesis-gravidarum
#4
Nor Zila Hassan Malek, Aida Kalok, Zainal Abidin Hanafiah, Shamsul Azhar Shah, Nor Azlin Mohamed Ismail
Background Transient non-immune hyperthyroidism in early pregnancy is hyperthyroidism diagnosed for the first time in early pregnancy, without evidence of thyroid autoimmunity or clinical findings of Grave's disease and resolved spontaneously as the pregnancy progressed. Hyperemesis gravidarum (HG) is the commonest cause with 66%-73% of women with severe HG were found to have elevated thyroid function. Materials and methods We conducted a cross sectional study to determine the prevalence of transient hyperthyroidism in patients with hyperemesis gravidarum and its relation to the severity of nausea and vomiting...
March 23, 2017: Hormone Molecular Biology and Clinical Investigation
https://www.readbyqxmd.com/read/28333271/impact-of-thyroid-autoimmunity-in-euthyroid-women-on-live-birth-rate-after-iui
#5
D Unuane, B Velkeniers, B Bravenboer, P Drakopoulos, H Tournaye, J Parra, M De Brucker
STUDY QUESTION: Does thyroid autoimmunity (TAI) predict live birth rate in euthyroid women after one treatment cycle in IUI patients? SUMMARY ANSWER: TAI as such does not influence pregnancy outcome after IUI treatment. WHAT IS KNOWN ALREADY: The role of TAI on pregnancy outcome in the case of IVF/ICSI is largely debated in the literature. This is the first study to address this issue in the case of IUI. STUDY DESIGN, SIZE, DURATION: This was a retrospective cohort study...
February 23, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28332275/thyroid-dysfunction-in-patients-with-down-syndrome-results-from-a-multi-institutional-registry-study
#6
Jenifer Lavigne, Christianne Sharr, Ibrahim Elsharkawi, Al Ozonoff, Nicole Baumer, Campbell Brasington, Sheila Cannon, Blythe Crissman, Emily Davidson, Jose C Florez, Priya Kishnani, Angela Lombardo, Jordan Lyerly, Mary Ellen McDonough, Alison Schwartz, Kathryn Berrier, Susan Sparks, Kara Stock-Guild, Tomi L Toler, Kishore Vellody, Lauren Voelz, Brian G Skotko
The goals of this undertaking were to assess the outcomes of thyroid screening tests and adherence to thyroid screening guidelines across five Down syndrome (DS) specialty clinics in various states. Data related to thyroid screening were collected for 663 individuals across five clinics specializing in the comprehensive care of individuals with DS for a period of 1 year. Of the 663 participants, 47.7% of participants had a TSH and free T4 ordered at their DS specialty clinic visit. Approximately 19.0% (60/316) had a new thyroid disorder diagnosis made...
March 23, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28329380/subclinical-thyroid-dysfunction-and-cardiovascular-diseases-2016-update
#7
Carmen Floriani, Baris Gencer, Tinh-Hai Collet, Nicolas Rodondi
Subclinical thyroid dysfunction comprises subclinical hypothyroidism (SHypo), defined as elevated thyroid-stimulating hormone (TSH) by normal free thyroxine (FT4), and subclinical hyperthyroidism (SHyper) with decreased or undetectable TSH and normal FT4. Up to 10% of the elderly have SHypo, which is usually asymptomatic. Individual participant data (IPD) analyses of prospective cohort studies from the international Thyroid Studies Collaboration show that SHypo is associated with increased coronary heart disease (CHD) mortality [hazard ratio (HR) 1,58 for TSH ≥ 10 mIU/L, 95% CI 1...
February 27, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28327686/thyroid-hormone-profile-in-patients-with-chronic-kidney-disease-a-single-centre-study
#8
S Singh, A Verma, G Aryal, S Thapa, S Khakurel, K Shrestha
BACKGROUND: Chronic kidney disease (CKD) is a global burden and now recognized as a major public health problem worldwide. Patients with CKD have alteration in thyroid hormone metabolism. This study aims to evaluate the status of thyroid hormone profile in different stages of CKD. METHODS: The cross-sectional study included 103 CKD patients attending Nephrology and Dialysis unit of KIST Medical College Teaching Hospital, Lalitpur, Nepal. Serum creatinine, free triiodothyronine (fT3), free thyroxine (fT4), and thyroid stimulating hormone (TSH) were measured...
September 2016: Journal of Nepal Health Research Council
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
#9
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/28325735/rescue-preoperative-treatment-with-lugol-s-solution-in-uncontrolled-graves-disease
#10
Jan Calissendorff, Henrik Falhammar
BACKGROUND: Graves' disease is a common cause of hyperthyroidism. Three therapies have been used for decades: pharmacologic therapy, surgery and radioiodine. In case of adverse events, especially agranulocytosis or hepatotoxicity, pre-treatment with Lugol's solution containing iodine/potassium-iodide to induce euthyroidism before surgery could be advocated but has rarely been reported. METHOD: All patients hospitalised due to uncontrolled hyperthyroidism at the Karolinska University Hospital 2005-2015 and treated with Lugol's solution were included...
March 21, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/28325623/impact-of-body-mass-index-on-survival-outcome-in-patients-with-differentiated-thyroid-cancer
#11
Yousif Al-Ammar, Bader Al-Mansour, Omar Al-Rashood, Mutahir A Tunio, Tahera Islam, Mushabbab Al-Asiri, Khalid Hussain Al-Qahtani
INTRODUCTION: Increased body mass index (BMI) is known to be associated with the high prevalence of Differentiated Thyroid Cancers (DTC); however data on its impact on survival outcome after thyroidectomy and adjuvant therapy is scanty. OBJECTIVE: We aimed to evaluate the impact of BMI on overall survival (OS) and disease free survival (DFS) rates in patients with DTC. METHODS: Between 2000 and 2011, 209 patients with DTC (papillary, follicular, hurthle cell) were treated with thyroidectomy followed by adjuvant radioactive iodine-131 (RAI) therapy and thyroid-stimulating hormone (TSH) suppression...
February 28, 2017: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/28324131/case-report-fast-reversal-of-severe-osteoporosis-after-correction-of-excessive-levothyroxine-treatment-and-long-term-follow-up
#12
C M Laine, K Landin-Wilhelmsen
This case report describes a 38-year-old woman, who presented with bilateral femoral stress fractures and osteoporosis after years of excessive levothyroxine treatment. Her bone health was restored rapidly and long-lasting with the reduction of levothyroxine dosage. No bone-active treatment was warranted. INTRODUCTION: Hyperthyroidism is a known risk factor for osteoporosis and fractures. Recent studies on patients with serum thyrotropin-suppressive therapy have not, however, indicated adverse effects on bone during long-term follow-up...
March 21, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28324106/clinical-features-of-early-and-late-postoperative-hypothyroidism-after-lobectomy
#13
Suyeon Park, Min Ji Jeon, Eyun Song, Hye-Seon Oh, Mijin Kim, Hyemi Kwon, Tae Yong Kim, Suck Joon Hong, Young Kee Shong, Won Bae Kim, Tae-Yon Sung, Won Gu Kim
Context: Lobectomy is preferred in thyroid cancer to decrease surgical complications and avoid lifelong thyroid-hormone replacement. However, postoperative hypothyroidism, requiring thyroid-hormone replacement, may occur. Objective: We aimed to identify the incidence and risk factors of postoperative hypothyroidism to develop a surveillance strategy after lobectomy for papillary thyroid microcarcinoma (PTMC). Methods: This historical cohort study involved 335 PTMC patients treated by lobectomy...
January 11, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28324063/dio2-thr92ala-reduces-deiodinase-2-activity-and-serum-t3-levels-in-thyroid-deficient-patients
#14
M G Castagna, M Dentice, S Cantara, R Ambrosio, F Maino, T Porcelli, C Marzocchi, C Garbi, F Pacini, D Salvatore
Context: A significant proportion of athyreotic LT4-treated patients experience hypothyroid-like symptoms. During LT4 replacement, levels of the active hormone triiodothyronine (T3) strictly depend on type-2-deiodinase (D2)-mediated activation of LT4. The Thr92Ala polymorphism and the 258 G/A in the DIO2 gene have been associated with various clinical conditions. Objectives: To investigate the effects of DIO2 polymorphisms in thyroid hormone homeostasis. Design: We compared the pre-surgical hormonal status of thyroidectomized LT4-treated patients who had a similar TSH level, to their post-surgery status, and analyzed their DIO2 genotype in a subgroup of 102/140 (72...
February 2, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28324018/thyroid-status-and-mortality-in-a-prospective-hemodialysis-cohort
#15
Connie M Rhee, Amy S You, Danh V Nguyen, Steven M Brunelli, Matthew J Budoff, Elani Streja, Tracy Nakata, Csaba P Kovesdy, Gregory A Brent, Kamyar Kalantar-Zadeh
Context and Objective: Compared to the general population, hemodialysis patients have a substantially higher risk of hypothyroidism, as defined by an elevated serum thyrotropin (TSH) level, and cardiovascular mortality. Whereas an elevated serum TSH is associated with cardiovascular disease and death in the general population, these associations among dialysis patients have been inconsistent. Design, Setting, Participants, and Main Outcome: We examined 541 hemodialysis patients from 17 Southern California dialysis centers in the prospective Hypothyroidism, Cardiovascular Health, and Survival (HyCARDS) study who underwent protocolized measurement of repeated serum TSH levels every six months from May 2013 to August 2015...
January 27, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28324000/trh-action-is-impaired-in-pituitaries-of-male-igsf1-deficient-mice
#16
Marc-Olivier Turgeon, Tanya L Silander, Denica Doycheva, Xiao-Hui Liao, Marc Rigden, Luisina Ongaro, Xiang Zhou, Sjoerd D Joustra, Jan M Wit, Mike G Wade, Heike Heuer, Samuel Refetoff, Daniel J Bernard
Loss-of-function mutations in the X-linked immunoglobulin superfamily, member 1 (IGSF1) gene cause central hypothyroidism. IGSF1 is a transmembrane glycoprotein of unknown function expressed in TSH-producing thyrotrope cells of the anterior pituitary gland. The protein is co-translationally cleaved, with only its C-terminal domain (CTD) being trafficked to the plasma membrane. Most intragenic IGSF1 mutations in humans map to the CTD. Here, we used CRISPR-Cas9 to introduce a loss-of-function mutation into the IGSF1-CTD in mice...
January 13, 2017: Endocrinology
https://www.readbyqxmd.com/read/28323940/thyroid-signaling-insulin-resistance-and-type-2-diabetes-mellitus-a-mendelian-randomization-study
#17
Maxime M Bos, Roelof Aj Smit, Stella Trompet, Diana van Heemst, Raymond Noordam
CONTEXT: Increasing evidence suggests an association between thyroid stimulating hormone (TSH), free thyroxine (fT4) and deiodinases with insulin resistance and type 2 diabetes mellitus (T2D). OBJECTIVE: We examined whether TSH and fT4 levels and deiodinases are causally associated with insulin resistance and T2D using Mendelian randomization (MR). METHODS: We selected twenty genetic variants for TSH level and four for fT4 level (identified in a GWAS meta-analysis of European-ancestry cohorts) as instrumental variables for TSH and fT4 level, respectively...
March 9, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28323910/progressive-development-of-pth-resistance-in-patients-with-inactivating-mutations-on-the-maternal-allele-of-gnas
#18
Alessia Usardi, Asmaa Mamoune, Elodie Nattes, Jean-Claude Carel, Anya Rothenbuhler, Agnès Linglart
Background: PTH resistance is characterized by hypocalcaemia, hyperphosphatemia and elevated PTH in absence of vitamin D deficiency. Pseudohypoparathyroidism (PHP) type 1A (or iPPSD2, inactivating Signaling PTH/PTHrp Disorder 2 according to the new classification) is caused by mutations in the maternal GNAS allele. Objective: To assess PTH resistance over time in 20 patients affected by iPPSD2 (PHP1A), diagnosed because of family history, ectopic ossification or short stature and carrying a GNAS mutation...
February 21, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28322754/evaluation-of-the-clsi-ep26-a-protocol-for-detection-of-reagent-lot-to-lot-differences
#19
Brooke M Katzman, Karl M Ness, Alicia Algeciras-Schimnich
BACKGROUND: Verification of new reagent lots is a required laboratory task. The Clinical and Laboratory Standards Institute (CLSI) EP26-A guideline provides a lot-to-lot verification protocol to detect significant changes in test performance. The aim of this study was to compare the performance of EP26-A with our laboratory reagent lot verification protocol. METHODS: Prospective evaluations for two reagent lots each for thyroid stimulating hormone (TSH), thyroglobulin (Tg), thyroxine (T4), triiodothyronine (T3), free triiodothyronine (fT3), and thyroid peroxidase antibody (TPOAb) were performed...
March 17, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28322461/iodinated-tg-in-thyroid-follicular-lumen-regulates-ttf-1-and-pax8-expression-via-tsh-tshr-signaling-pathway
#20
Huibin Huang, Yaxiong Shi, Bo Liang, Huiyao Cai, Qingyan Cai
Our previous study showed that highly iodinated thyroglobulin (TG) inhibited thyroid transcription factor-1 (TTF-1) and paired box gene 8 (PAX8) expression, but the potential mechanism remains unclear. In this study, we constructed a thyroid follicle model in vitro to mimic its natural physiological structure and explored how iodinated TG in the follicular lumen tuned TTF-1 and PAX8 expression. Our data showed that lowly iodinated TG enhanced PKA activity while upregulation of both TTF-1 and PAX8 expression; and that highly iodinated TG triggered PKC activity while suppression of TTF-1 and PAX8 expression...
March 21, 2017: Journal of Cellular Biochemistry
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