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TSH AND Iodine

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https://www.readbyqxmd.com/read/28741453/no-effect-of-levothyroxine-and-levothyroxine-induced-subclinical-thyrotoxicosis-on-the-pharmacokinetics-of-sorafenib-in-healthy-male-subjects
#1
Funan Huang, Antoinette Ajavon-Hartmann, Erya Huang, John Lettieri, Rong Liu, Carol Pena, Matthias Berse
<b>Background</b>: Patients receiving the multikinase inhibitor sorafenib for locally recurrent or metastatic, progressive, differentiated thyroid carcinoma (DTC) refractory to radioactive iodine often receive concomitant levothyroxine for thyroid-stimulating hormone (TSH) suppression. In the phase 3 DTC trial (DECISION), sorafenib exposure was ~2-fold higher than that observed in other cancers. We assessed sorafenib pharmacokinetics without and with concomitant levothyroxine to examine whether a levothyroxine interaction or levothyroxine-induced subclinical thyrotoxicosis results in increased sorafenib exposure in DTC patients...
July 25, 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/28729772/serial-stimulated-thyroglobulin-measurements-are-more-specific-for-detecting-distant-metastatic-differentiated-thyroid-cancer-before-radioiodine-therapy
#2
Teng Zhao, Jun Liang, Tianjun Li, Wen Gao, Yansong Lin
OBJECTIVE: Preablative stimulated thyroglobulin (ps-Tg) has the potential to be used in identifying distant metastatic differentiated thyroid carcinoma (DM-DTC), but its single level can be affected by remnant thyroid tissue and thyrotropin (TSH). The objective of this retrospective study was to evaluate the value of serial ps-Tg measurements in identifying DM-DTC specifically. METHODS: A total of 317 DTC patients with serial measurements of ps-Tg, TSH and anti-Tg antibody were divided into M1 (n=72) and M0 (n=245) according to the presence of distant metastasis (DM) or not...
June 2017: Chinese Journal of Cancer Research, Chung-kuo Yen Cheng Yen Chiu
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/28670190/newborn-screening-for-thyroid-stimulating-hormone-as-an-indicator-for-assessment-of-iodine-status-in-the-republic-of-macedonia
#4
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/28648507/resistance-to-thyrotropin
#5
REVIEW
Helmut Grasberger, Samuel Refetoff
Resistance to thyrotropin (RTSH) is broadly defined as reduced sensitivity of thyroid follicle cells to stimulation by biologically active TSH due to genetic defects. Affected individuals have elevated serum TSH in the absence of goiter, with the severity ranging from nongoitrous isolated hyperthyrotropinemia to severe congenital hypothyroidism with thyroid hypoplasia. Conceptually, defects leading to RTSH impair both aspects of TSH-mediated action, namely thyroid hormone synthesis and gland growth. These include inactivating mutations in the genes encoding the TSH receptor and the PAX8 transcription factor...
March 2017: Best Practice & Research. Clinical Endocrinology & Metabolism
https://www.readbyqxmd.com/read/28637498/incidence-of-thyroid-dysfunction-in-an-iranian-adult-population-the-predictor-role-of-thyroid-autoantibodies-results-from-a-prospective-population-based-cohort-study
#6
Ashraf Aminorroaya, Rokhsareh Meamar, Massoud Amini, Awat Feizi, Azamosadat Tabatabae, Elham Faghih Imani
BACKGROUND: The prevalence of thyroid dysfunction is high in Isfahan, an area of iodine sufficient in Iran. The aim of this study is to investigate the incidence of thyroid dysfunctions in adults of metropolitan Isfahan and to determine the role of thyroid autoantibodies. METHODS: In a population-based cohort study in 2006-2011, we measured TSH, T4, T3, thyroid peroxidase antibody (TPOAb), and thyroglobulin antibody (TgAb) in 618 out of 2254 people who were euthyroid in 2006...
June 21, 2017: European Journal of Medical Research
https://www.readbyqxmd.com/read/28633507/digenic-duox1-and-duox2-mutations-in-cases-with-congenital-hypothyroidism
#7
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/28627204/iodine-levels-are-associated-with-oxidative-stress-and-antioxidant-status-in-pregnant-women-with-hypertensive-disease
#8
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/28620714/the-outcome-of-i-131-ablation-therapy-for-intermediate-and-high-risk-differentiated-thyroid-cancer-using-a-strict-definition-of-successful-ablation
#9
Ken Watanabe, Mayuki Uchiyama, Kunihiko Fukuda
PURPOSE: This article examines the outcome of radioactive iodine ablation therapy for thyroid cancer in high-risk patients and investigates background factors influencing ablation failure. MATERIALS AND METHODS: We included 91 patients in this retrospective analysis and evaluated the ablation success rate. Successful ablation was defined as the absence of visible iodine-131 (I-131) accumulation in the thyroid bed after whole-body scans and thyroglobulin levels <2 ng/ml in a TSH-stimulated state after ablation...
June 15, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28620500/lugol-s-solution-induced-painless-thyroiditis
#10
Ji Wei Yang, Jacques How
Lugol's solution is usually employed for a limited period for thyroidectomy preparation in patients with Graves' disease and for the control of severe thyrotoxicosis and thyroid storm. We describe a rare case of Lugol's solution-induced painless thyroiditis. In November 2014, a 59-year-old woman was prescribed Lugol's solution four drops per day for the alleviation of menopausal symptoms. She was referred to our clinic in June 2015 for fatigue, hair loss, and a 20-lb weight loss without thyroid pain or discomfort...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28620496/growth-hormone-and-insulin-like-growth-factor-1-affect-the-severity-of-graves-disease
#11
Alfredo Di Cerbo, Federica Pezzuto, Alessandro Di Cerbo
Graves' disease, the most common form of hyperthyroidism in iodine-replete countries, is associated with the presence of immunoglobulins G (IgGs) that are responsible for thyroid growth and hyperfunction. In this article, we report the unusual case of a patient with acromegaly and a severe form of Graves' disease. Here, we address the issue concerning the role of growth hormone (GH) and insulin-like growth factor 1 (IGF1) in influencing thyroid function. Severity of Graves' disease is exacerbated by coexistent acromegaly and both activity indexes and symptoms and signs of Graves' disease improve after the surgical remission of acromegaly...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28611576/maternal-different-degrees-of-iodine-deficiency-during-pregnant-and-lactation-impair-the-development-of-cerebellar-pinceau-in-offspring
#12
Jing Dong, Heling Song, Yuan Wang, Min Li, Ye Yu, Yi Wang, Jie Chen
Aims: Iodine is critical for synthesis of thyroid hormones (TH). And iodine deficiency (ID) is one of the most significant reasons of intellectual disability and motor memory impairment, although the potential mechanisms are still under investigation. Presently, mild ID and marginal ID are largely ignored problems for women of child bearing age. Mild ID is a subtle form of TH deficiency, which shows low levels of free thyroxine (FT4) and relatively normal free triiodothyronine (FT3) or thyroid stimulation hormone (TSH)...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28604338/intra-individual-variability-in-tsh-levels-of-healthy-women-during-the-first-half-of-pregnancy
#13
Mayte Murillo-Llorente, Carmen Fajardo-Montañana, Marcelino Pérez-Bermejo, Rafael Vila-Candel, José Gómez-Vela, Inés Velasco
OBJECTIVE: TSH is the parameter most widely accepted to assess thyroid function, especially in pregnant women. The aim of this current study was to analyze intra-individual changes in TSH during the first half of pregnancy in women with TSH levels higher than 2.5mIU/L in early pregnancy. METHODS: An observational, prospective study was conducted on 243 healthy pregnant women in the first trimester of pregnancy. Thyroid function was assessed by testing TSH and free T4 levels...
June 2017: Endocrinología, diabetes y nutrición
https://www.readbyqxmd.com/read/28599610/re-thyroglobulin-as-a-functional-biomarker-of-iodine-status-in-a-cohort-study-of-pregnant-women-in-the-united-kingdom-by-bath-et-al-thyroid-2017-27-426-433
#14
Eftychia G Koukkou, Kostas B Markou
No abstract text is available yet for this article.
July 17, 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/28589089/reference-values-for-tsh-and-free-thyroid-hormones-in-healthy-pregnant-women-in-poland-a-prospective-multicenter-study
#15
Marta Kostecka-Matyja, Anna Fedorowicz, Ewa Bar-Andziak, Tomasz Bednarczuk, Monika Buziak-Bereza, Paulina Dumnicka, Maria Górska, Małgorzata Krasnodębska, Beata Niedźwiedzka, Dorota Pach, Marek Ruchała, Katarzyna Siewko, Bogdan Solnica, Jerzy Sowiński, Małgorzata Szelachowska, Małgorzata Trofimiuk-Müldner, Katarzyna Wachowiak-Ochmańska, Alicja Hubalewska-Dydejczyk
OBJECTIVES: The diagnosis and treatment of thyroid diseases in pregnant women remains a challenge. Various medical associations recommend establishing the reference intervals for thyroid hormones by a local laboratory. Considering differences within geophysical, socioeconomic conditions, and iodine prophylaxis in various populations, it is advisable to assess reference intervals for thyroid hormones specific to a region of residence. The objective was to assess trimester-specific reference intervals for TSH, fT3, and fT4 for pregnant women in the Polish population...
April 2017: European Thyroid Journal
https://www.readbyqxmd.com/read/28572231/thyrotoxicosis-investigation-and-management%C3%A2
#16
REVIEW
Jackie Gilbert
Graves' disease (GD) and toxic nodular (TN) goitre account for most cases of thyrotoxicosis associated with hyperthyroidism. Hyperthyroidism is confirmed with measurement of a suppressed serum thyrotropin concentration (TSH) and elevated free thyroid hormones. The three therapeutic options are antithyroid drugs, radioactive iodine and surgery. Thionamides achieve long-term remission in 35% of cases. Many centres administer fixed doses of iodine-131; larger doses result in improved rates of cure at the cost of hypothyroidism...
June 2017: Clinical Medicine: Journal of the Royal College of Physicians of London
https://www.readbyqxmd.com/read/28567292/euthyroid-athyroxinemia-a-novel-endocrine-syndrome
#17
Nicholas Woodhouse, Fatima Bahowairath, Omayma Elshafie
A 55-year-old female was referred with abnormal thyroid function tests (TFTs); the free thyroxine level (FT4) was undetectable <3.3 pmol/L (normal: 7.9-14.4), while her FT3, TSH and urinary iodine levels were normal. She was clinically euthyroid with a large soft lobulated goitre that had been present for more than thirty years. She received an injection of recombinant human TSH (rhTSH) following which there was a progressive rise of the FT3 and TSH levels to 23 pmol/L and >100 mIU/L respectively at 24 h, The FT4 however remained undetectable throughout...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28550398/association-of-tumor-size-and-focality-with-recurrence-persistence-in-papillary-thyroid-cancer-patients-treated-with-total-thyroidectomy-along-with-radioactive-iodine-ablation-and-tsh-suppression
#18
Misbah Khan, Aamir Ali Syed, Amina Iqbal Khan, Syed Raza Hussain, Namra Urooj
Locoregional recurrence is common in papillary thyroid cancer PTC and an optimal surgical treatment with respect to the multifocal nature of the disease stays controversial. It is a retrospective analytical study design. 209 diagnosed PTCs managed at our institute were grouped into macro-PTC with a size of dominant focus >1 cm (unifocal n = 106 and multifocal n = 64) and micro-PTMC if size of all foci was <1 cm; (unifocal n = 16 and multifocal PTMC n = 23). The primary endpoint is recurrence and tumor free survival in each of the four groups...
May 26, 2017: Updates in Surgery
https://www.readbyqxmd.com/read/28549315/associations-between-the-levels-of-thyroid-hormones-and-lipid-lipoprotein-levels-data-from-national-health-and-nutrition-examination-survey-2007-2012
#19
Ram B Jain
Data from National Health and Nutrition Examination Survey for the years 2007-2012 were used to investigate associations between thyroid hormones and lipid/lipoprotein levels for a representative sample of general US population aged ≥20 years. There were no statistically significant differences for adjusted high density lipoprotein levels among thyroid function groups, namely, subclinical hyperthyroid (SCHPR), clinical hyperthyroid (CHPR), euthyroid (EU), clinical hypothyroid (CHYP), and subclinical hypothyroid (SCHYP)...
July 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28545679/selective-use-of-radioactive-iodine-rai-in-thyroid-cancer-no-longer-one-size-fits-all
#20
REVIEW
J L Marti, L G T Morris, A S Ho
A remarkable, evidence-based trend toward de-escalation has reformed the practice of radioactive iodine (RAI) administration for thyroid cancer patients. Updated guidelines have supported both decreased RAI doses for select populations, as well as expanded definitions of low-risk and intermediate-risk patients that may not require RAI. Correspondingly, there is now increased flexibility for hemithyroidectomy without need for RAI, and relaxed TSH suppression targets for low-risk thyroidectomy patients. Clinical judgment remains indispensable where multiple risk factors co-exist that individually are not indications for RAI...
May 3, 2017: European Journal of Surgical Oncology
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