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https://www.readbyqxmd.com/read/28932413/a-clinician-s-guide-to-understanding-resistance-to-thyroid-hormone-due-to-receptor-mutations-in-the-tr%C3%AE-and-tr%C3%AE-isoforms
#1
Brijesh K Singh, Paul M Yen
There are two genes that express the major thyroid hormone receptor isoforms. Mutations in both these genes have given rise to Resistance to Thyroid Hormone (RTH) syndromes (RTHβ, RTHα) that can have variable phenotypes for mutations of the same receptor isoform as well as between the two receptor isoforms. In general, the relative tissue-specific distribution of TRβ and TRα determine RTH in different tissues for each form of RTH. These differences highlight some of the isoform-specific roles of each TR isoform...
2017: Clinical Diabetes and Endocrinology
https://www.readbyqxmd.com/read/28931318/thyroid-function-testing-in-neonates-with-maternal-history-of-disease
#2
Lisa Underland, Lisa Kenigsberg, Kristina Derrick, Rebecca Crespi, Tara Kaushal, Leslie Lam
Maternal history of thyroid disease can cause congenital hypothyroidism due to thyroid-stimulatng hormone (TSH) blocking antibodies. No guidelines exist regarding testing beyond the newborn screen. TSH and T4 levels exhibit significant fluctuations after birth which complicates testing. A total of 561 newborns with thyroid function testing done for maternal history of thyroid disease in the newborn nursery were identified retrospectively via chart review, and thyroid disease status was assessed in 352. Newborn screening data were also obtained...
September 1, 2017: Clinical Pediatrics
https://www.readbyqxmd.com/read/28915538/long-term-t3-and-t4-treatment-as-an-alternative-to-aerobic-exercise-training-in-improving-cardiac-function-post-myocardial-infarction
#3
Rayane Brinck Teixeira, Alexsandra Zimmer, Alexandre Luz de Castro, Bruna Gazzi de Lima-Seolin, Patrick Türck, Rafaela Siqueira, Adriane Belló-Klein, Pawan K Singal, Alex Sander da Rosa Araujo
Here we aimed to compare the beneficial effects of T3 and T4 hormone treatment to those provided by aerobic exercise training in Wistar rats post-myocardial infarction (MI). Rats in one group were SHAM-operated and in the other group were subjected to MI surgery. One week after surgery, the MI group animals either received T3 and T4 hormones by gavage or underwent a low intensity aerobic exercise training protocol on a treadmill, and both treatments lasted until 10 weeks after MI. Untreated SHAM-operated and MI groups were also followed for the same duration...
September 11, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28913003/corrigendum-to-the-relationship-between-population-t4-tsh-set-point-data-and-t4-tsh-physiology
#4
Stephen Paul Fitzgerald, Nigel Geoffrey Bean
[This corrects the article DOI: 10.1155/2016/6351473.].
2017: Journal of Thyroid Research
https://www.readbyqxmd.com/read/28910808/detecting-congenital-central-hypothyroidism-by-newborn-screening-difficulty-in-distinguishing-from-congenital-thyroxine-binding-globulin-deficiency
#5
Kara J Connelly, Melinda J Pierce, Cheryl Hanna, Stephen H LaFranchi
BACKGROUND/AIMS: Congenital central hypothyroidism (CH-C) can be detected on newborn screening (NBS) by programs using thyroxine (T4)-reflex thyroid-stimulating hormone (TSH) test approach. CH-C must be distinguished from T4-binding globulin (TBG) deficiency. We sought to determine whether thyroid function tests reliably separate CH-C from TBG deficiency. METHODS: We analyzed NBS and serum free and total T4, T3 resin uptake (T3RU) or TBG, and TSH for infants in the Northwest Regional NBS Program (NWRSP) between the years 2008 and 2015 with either CH-C or TBG deficiency...
September 14, 2017: Hormone Research in Pædiatrics
https://www.readbyqxmd.com/read/28898885/pilot-neonatal-screening-program-for-central-congenital-hypothyroidism-evidence-of-significant-detection
#6
Débora Braslavsky, Maria Virginia Méndez, Laura Prieto, Ana Keselman, Rosa Enacan, Laura Gruñeiro-Papendieck, Nicolas Jullien, Alexandru Savenau, Rachel Reynaud, Thierry Brue, Ignacio Bergadá, Ana Chiesa
BACKGROUND/AIM: Congenital hypothyroidism (CH) is a heterogeneous entity. Neonatal screening programs based on thyrotropin (TSH) determination allow primary CH diagnosis but miss central CH (CCH). CCH causes morbidity, alerts to other pituitary deficiencies, and is more prevalent than previously thought. We aimed at developing a pilot neonatal screening program for CCH detection. PATIENTS AND METHODS: A prospective 2-year pilot neonatal screening study based on simultaneous dried blood specimen TSH and thyroxine (T4) measurements was implemented in term newborns aged 2-7 days...
September 12, 2017: Hormone Research in Pædiatrics
https://www.readbyqxmd.com/read/28895537/definition-of-reference-ranges-for-free-t4-tsh-and-thyroglobulin-levels-in-healthy-subjects-of-the-ja%C3%A3-n-health-district
#7
Pablo Olmedo Carrillo, Piedad Santiago Fernández, Eduardo García Fuentes, Tomás Ureña Fernández, Carmen Gutiérrez Alcántara, Carolina Sánchez-Malo, Manuela Gassó Campos, María José Martínez Ramírez
BACKGROUND AND OBJECTIVES: The treatment guidelines for thyroid dysfunction recommend defining reference ranges for thyroid hormones in each area through assessment of local population data considering the iodine nutritional status. The aim of this study was to define the reference ranges of free thyroxine (FT4), TSH, and thyroglobulin levels in a general population from Jaen, an area of southern Spain with an adequate iodine nutritional status, and whether they were associated with urinary iodine levels...
October 2017: Endocrinología, diabetes y nutrición
https://www.readbyqxmd.com/read/28893262/effect-of-launaea-procumbens-on-thyroid-glands-lipid-peroxidation-and-hormonal-dysfunction-a-randomized-control-trial
#8
Rahmat Ali Khan
BACKGROUND: Launaea procumbens (Roxb.) Amin is traditionally used in Pakistan for the treatment of hormonal disorders and oxidative stress. The present study was aimed to evaluate the efficacy of Launaea procumbens methanol extract (LPME) against KBrO3-induced oxidative stress and hormonal dysfunction in thyroid. METHODS: To examine the effects of LPME against the oxidative stress of KBrO3 in thyroid tissue, 36 male albino rats were used. Protective effects of LPME were observed on thyroid hormonal levels, activities of antioxidant enzymes, lipid peroxidation (TBARS) and DNA damage...
September 11, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28892881/thyroid-hormone-levels-in-chronic-alcoholic-liver-disease-patients-before-and-after-treatment
#9
Jaswanth Kumar Papineni, Venkata Bharat Kumar Pinnelli, Raghavendra Davanum
INTRODUCTION: Alcoholic liver disease affects almost all aspects of the thyroid gland including the thyroid hormone levels and the thyroid gland size. The altered thyroid hormone levels in alcoholic liver disease may affect alcohol abstinence in withdrawal period by changing hormone milieu in brain, increasing withdrawal dysphoria and increasing craving. AIM: The aim of the present study was to assess and compare the levels of thyroid hormones- free T3, free T4, Thyroid Stimulating Hormone (TSH) and Gamma Glutamyl Transferase (GGT) in chronic alcoholic liver disease patients before and after treatment...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28886330/cornelia-de-lange-syndrome-with-thyroid-agenesis-of-an-indonesian-patient
#10
A M Maskoen, B Laksono, R Hajjah, A Zada, L P Suciati, P N Fauziah, H M Nataprawira
Cornelia de Lange syndrome (CdLs), which is also called Brachmann de Lange syndrome, is a congenital disorder characterized by distinctive facial features, prenatal and postnatal growth deficiency, feeding difficulties, psychomotor delay, behavioral problems, and associated malformations that mainly involve the upper extremities. The prevalence ranges from 1:100,000 to as high as 1:10,000. Most cases (50-60%) were carried mutation in NIPBL gene. To our knowledge this is the first CdLs Indonesian case that reported with molecular analysis study...
August 30, 2017: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/28883920/exogenous-t3-toxicosis-following-consumption-of-a-contaminated-weight-loss-supplement
#11
R D'Arcy, M McDonnell, K Spence, C H Courtney
A 42-year-old male presented with a one-week history of palpitations and sweating episodes. The only significant history was of longstanding idiopathic dilated cardiomyopathy. Initial ECG demonstrated a sinus tachycardia. Thyroid function testing, undertaken as part of the diagnostic workup, revealed an un-measureable thyroid-stimulating hormone (TSH) and free thyroxine (T4). Upon questioning the patient reported classical thyrotoxic symptoms over the preceding weeks. Given the persistence of symptoms free tri-iodothyronine (T3) was measured and found to be markedly elevated at 48...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28882111/tsh-cut-off-point-based-on-depression-in-hypothyroid-patients
#12
A Talaei, N Rafee, F Rafei, A Chehrei
BACKGROUND: The prevalence of depressive symptoms in hypothyroidism is high. Considering that hypothyroidism and depression share some clinical features, some researchers use the "brain hypothyroidism" hypothesis to explain the pathogenesis of depression. We aimed to detect a new TSH cut-off value in hypothyroidism based on depression symptoms. METHODS: A cross-sectional study was conducted on hypothyroid patients referred to endocrine clinics. Individuals who had developed euthyroid state under treatment with levothyroxine with TSH levels of 0...
September 7, 2017: BMC Psychiatry
https://www.readbyqxmd.com/read/28870408/thyroid-storm-and-warm-autoimmune-hemolytic-anemia
#13
Joseph A Moore, Louise Gliga, Srikanth Nagalla
Graves' disease is often associated with other autoimmune disorders, including rare associations with autoimmune hemolytic anemia (AIHA). We describe a unique presentation of thyroid storm and warm AIHA diagnosed concurrently in a young female with hyperthyroidism. The patient presented with nausea, vomiting, diarrhea and altered mental status. Laboratory studies revealed hemoglobin 3.9g/dL, platelets 171×10(9)L(-1), haptoglobin <5mg/dL, reticulocytosis, and positive direct antiglobulin test (IgG, C3d, warm)...
August 18, 2017: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28869870/the-hematological-and-biochemical-changes-in-rats-exposed-to-britholite-mineral
#14
Ahmet Sasmaz, Suheyla Ozkan, Mehmet Ferit Gursu, Merve Sasmaz
The present study was to investigate the alteration of biochemical and hematological parameters on the rats exposed to natural radiation caused by britholite mineral (REE, Ca, Na)5 [(Si,P)O4]3(OH,F) within 15 days. Britholite was collected from Kuluncak mining area, Malatya, bearing radioactive (232)Th isotope (average 2.68% ThO2), which is nadir earth elements found high amounts. Britholite is toxic for the living animal and human and emits the radiation to natural surroundings about 0.8R/h due to its radioactive (232)Th properties...
July 31, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28867693/mild-thyroid-peroxidase-deficiency-caused-by-tpo-mutations-with-residual-activity-correlation-between-clinical-phenotypes-and-enzymatic-activity
#15
Satoshi Narumi, Larry A Fox, Keisuke Fukudome, Zenichi Sakaguchi, Chiho Sugisawa, Kiyomi Abe, Kaori Kameyama, Tomonobu Hasegawa
Thyroid peroxidase (TPO) deficiency, caused by biallelic TPO mutations, is a well-established genetic form of congenital hypothyroidism (CH). More than 100 patients have been published, and the patients have been diagnosed mostly in the frame of newborn screening (NBS) programs. Correlation between clinical phenotypes and TPO activity remains unclear. Here, we report clinical and molecular findings of two unrelated TPO mutation-carrying mildly hypothyroid patients. The two patients were born at term after an uneventful pregnancy and delivery, and were NBS negative...
September 1, 2017: Endocrine Journal
https://www.readbyqxmd.com/read/28855267/therapy-of-endocrine-disease-t4-t3-combination-therapy-is-there-a-true-effect
#16
Wilmar M Wiersinga
5-10% of hypothyroid patients on T4 replacement have persistent symptoms, despite normal TSH levels. T4+T3 combination therapy provided no better outcomes according to a meta-analysis of 11 randomized clinical trials comparing T4 monotherapy with T4+T3 combination therapy. This review evaluates recent developments in the field of T4+T3 therapy . T4 monotherapy is associated with higher serum FT4 and lower serum FT3 and FT3/FT4 ratio's than in healthy subjects. T4+T3 combination therapy may mimic more closely thyroid function tests of healthy subjects, but it has not been demonstrated that relatively low serum FT3 or FT3/FT4 ratio's are linked to persistent symptoms...
August 30, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28846851/the-regulation-of-pituitary-thyroid-abnormalities-by-peripheral-administration-of-levothyroxine-increased-bdnf-and-reelin-proteins-expression-in-an-animal-model-of-alzheimer-s-disease
#17
Sahreh Shabani, Yaghoub Farbood, Seyyed Ali Mard, Alireza Sarkaki, Akram Ahangarpour, Layasadat Khorsandi
Alzheimer's disease (AD) is associated with decreased serum levels of thyroid hormones (THs), increased levels of thyroid-stimulating hormone (TSH) and decreased in protein expression of brain-derived neurotrophic factor (BDNF) and reelin in the hippocampus. In this study, we have evaluated the effect of subcutaneously (SC) administration of levothyroxine (L-T4) on levels of THs and TSH as well as protein expression of BDNF and reelin in AD rats. To make an animal model of AD, Beta-amyloid (Aβ) plus ibotenic acid were infused intrahippocampally (IH), and rats were treated with L-T4 and/or saline for 10 days...
August 28, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28836155/statistical-evaluation-of-trace-metals-tsh-and-t4-in-blood-serum-of-thyroid-disease-patients-in-comparison-with-controls
#18
Sidra Hanif, Asim Ilyas, Munir H Shah
The present study is based on the measurement of concentrations of selected trace metals (Fe, Zn, Cu, Co, Mn, Ni, Cr, Cd and Pb) and thyroid hormones (TSH and T4) in blood serum of hypothyroid and hyperthyroid patients in comparison with healthy donors/controls in order to establish the imbalances of the trace metals in diseased subjects. The serum samples were digested in HNO3-HClO4 mixture and quantification of the metals was performed by flame atomic absorption spectrometry. Average levels of Fe, Ni, Cu, Cr, Pb and TSH were found to be significantly higher (p < 0...
August 23, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28829155/efficacy-and-safety-of-ashwagandha-root-extract-in-subclinical-hypothyroid-patients-a-double-blind-randomized-placebo-controlled-trial
#19
Ashok Kumar Sharma, Indraneel Basu, Siddarth Singh
BACKGROUND: Subclinical hypothyroidism, a thyroid disorder without obvious symptoms of thyroid deficiency, occurs in 3%-8% of the global population. Ashwagandha [Withania somnifera (L.) Dunal], a traditional medicine in Ayurveda, is often prescribed for thyroid dysfunctions. OBJECTIVE: This pilot study was designed to evaluate the efficacy and safety of ashwagandha root extract in subclinical hypothyroid patients. DESIGN, SETTING, AND PARTICIPANTS: A prospective, randomized, double-blind, single-center placebo-controlled study was performed at Sudbhawana Hospital, Varanasi, India between May 2016 and September 2016...
August 22, 2017: Journal of Alternative and Complementary Medicine: Research on Paradigm, Practice, and Policy
https://www.readbyqxmd.com/read/28816534/seven-familial-dysalbuminemic-hyperthyroxinemia-cases-in-three-unrelated-japanese-families-and-high-performance-liquid-chromatography-analysis-of-the-thyroxine-binding-profile
#20
Hidekazu Nagano, Yoshinori Nakagawa, Naofumi Ishikawa, Yuya Watanabe, Yui Miyabayashi, Akitoshi Nakayama, Masanori Fujimoto, Eri Komai, Akina Shiga, Ai Tamura, Takashi Kono, Tomoko Takiguchi, Seiichiro Higuchi, Ikki Sakuma, Naoko Hashimoto, Sawako Suzuki, Hisashi Koide, Kotaro Yokote, Tomoaki Tanaka
OBJECTIVE: Familial dysalbuminemic hyperthyroxinemia (FDH) is caused by abnormal human serum albumin (HSA) with an increased thyroxine (T4) affinity leading to euthyroid hyperthyroxinemia. One- and two-step immunoassay of serum samples from FDH patients (e.g., Japanese patients) with the HSA R218P mutation can yield false-positive free thyroxine (FT4) results. Therefore, it is difficult to distinguish FDH from syndrome of inappropriate secretion of thyroid-stimulating hormone (e.g., syndrome of resistance to thyroid hormone, thyroid-stimulating hormone [TSH]-producing pituitary adenoma), even when multiple assays are used...
August 17, 2017: Endocrine Practice
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