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https://www.readbyqxmd.com/read/29139142/safety-of-orally-administered-usp-compliant-levothyroxine-sodium-tablets-in-dogs
#1
J E Hare, C M K Morrow, J Caldwell, W E Lloyd
The safety of synthetic levothyroxine sodium tablets (Thyro-Tabs® Canine; LLOYD, Inc.) in dogs was evaluated in a randomized, sham-dose controlled, parallel-group study. Young, healthy, euthyroid Beagle dogs were randomized into four groups (four females and four males per group) and received single daily doses of 0×, 2× (0.044 mg/kg), 6× (0.132 mg/kg), or 10× (0.22 mg/kg) the labeled starting dose of 0.022 mg kg(-1)  day(-1) for 182 days. Every 2 weeks, physical examinations, electrocardiology examinations, and sample collections for thyroid panel, hematology, serum biochemistry, coagulation panel, and urinalysis were performed...
November 15, 2017: Journal of Veterinary Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/29120652/-hypothyroidism-in-patients-with-heart-disease
#2
Jan Jiskra
Hypothyroidism is frequently found in patients with heart disease. It is a risk factor for atherosclerosis and ischemic heart disease and has a direct negative effect on both the left and right ventricular functions (hypothyroidism-induced cardiomyopathy). The confirmed manifest hypothyroidism is always a reason for replacement therapy with levothyroxine; regarding patients with heart disease, we always begin treatment with a small dose and increase it gradually. The treatment of subclinical hypothyroidism in patients with heart disease is disputable and its benefits probably depend on age...
2017: Vnitr̆ní Lékar̆ství
https://www.readbyqxmd.com/read/29095280/primary-hypothyroidism-and-isolated-acth-deficiency-induced-by-nivolumab-therapy-case-report-and-review
#3
REVIEW
Mei Fang Zeng, Li Chen, Hong Ying Ye, Wei Gong, Li Nuo Zhou, Yi Ming Li, Xiao Long Zhao
RATIONALE: Nivolumab is a monoclonal IgG antibody blocking programmed death receptor-1 (PD1), leading to restoration of the natural T-cell-mediated immune response against the cancer cells. However, it also causes plenty of autoimmune-related adverse events, which often involves endocrine system. PATIENT CONCERNS: A 54-year-old male with renal clear cell carcinoma was treated with nivolumab intravenously. Routine monitoring showed elevated thyroid-stimulating hormone and low free thyroxine after the 6th administration of nivolumab...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29071237/the-effect-of-daily-versus-weekly-levothyroxine-replacement-on-thyroid-function-test-in-hypothyroid-patients-at-a-tertiary-care-centre-in-haryana
#4
Rajesh Rajput, Vaibhav Pathak
OBJECTIVE: We compare the effect of daily versus weekly levothyroxine (LT4) replacement on thyroid function test (TFT) in hypothyroid patients at a tertiary care centre in Haryana. MATERIALS AND METHODS: This was a randomised crossover study in which 100 hypothyroid patients on a stable LT4 dose were divided into 2 groups of 50 each. In group I, patients were given daily therapy for 6 weeks and then shifted to weekly therapy for the next 6 weeks. In group II, patients were given LT4 once a week for 6 weeks and then switched to daily therapy for the next 6 weeks...
September 2017: European Thyroid Journal
https://www.readbyqxmd.com/read/29062583/the-end-diastolic-velocity-of-thyroid-arteries-is-strongly-correlated-with-the-peak-systolic-velocity-and-gland-volume-in-patients-with-autoimmune-thyroiditis
#5
Danilo Bianchini Höfling, Suemi Marui, Carlos Alberto Buchpiguel, Giovanni Guido Cerri, Maria Cristina Chammas
BACKGROUND: The end-diastolic velocity (EDV) of thyroid arteries reflects peripheral blood flow resistance. OBJECTIVE: The aim was to evaluate EDV correlations with other Doppler sonography parameters and with clinical and biochemical variables in a sample of patients with hypothyroidism caused by chronic autoimmune thyroiditis (CAT). METHODS: A sample of 48 CAT hypothyroid patients receiving treatment with stable doses of levothyroxine was selected...
2017: Journal of Thyroid Research
https://www.readbyqxmd.com/read/29026577/split-high-dose-oral-levothyroxine-treatment-as-a-successful-therapy-option-in-myxedema-coma
#6
Suranut Charoensri, Chutintorn Sriphrapradang, Hataikarn Nimitphong
High-dose intravenous thyroxine (T4) is the preferable treatment for myxedema coma. We describe the clinical course of a 69-year-old man who presented with myxedema coma and received oral levothyroxine (LT4) therapy (1 mg) in a split dose. This suggests split high-dose oral LT4 as a therapeutic option in myxedema coma.
October 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/28989911/the-effect-of-levothyroxine-on-serum-levels-of-interleukin-10-and-interferon-gamma-in-rat-model-of-multiple-sclerosis
#7
Cobra Payghani, Fatemeh Khani, Aryan Rafiee Zadeh, Parham Reisi, Hojjatallah Alaei, Bahman Rashidi
BACKGROUND: There is an increase in inflammatory and a reduction in anti-inflammatory cytokines in multiple sclerosis (MS). Considering the role of thyroid hormones in the development and regulation of both neural and immune systems, the aim of this study was to evaluate the effects of levothyroxine on serum concentrations of interleukin-10 (IL-10) and interferon gamma (IFN-γ) in animal models of MS. MATERIALS AND METHODS: To induce demyelination in male Wistar rats, lysolecithin was injected into the optic chiasm...
2017: Advanced Biomedical Research
https://www.readbyqxmd.com/read/28960781/whole-lung-irradiation-in-stage-iv-wilms-tumor-patients-thyroid-dosimetry-and-outcomes
#8
Tiffany M Morgan, Hasan Danish, Ronica H Nanda, Natia Esiashvili, Lillian R Meacham
PURPOSE: To report the thyroid dosimetry and long-term follow-up of childhood cancer survivors treated with whole lung irradiation (WLI) for Wilms tumor. METHODS: Twenty-eight patients with pulmonary metastases from Wilms tumor who underwent WLI from 2000 TO 2012 at a single institution were reviewed. Radiation dose to the thyroid gland in each case was calculated. Postradiation thyroid function test (TFT) results and management of thyroid function abnormalities were extracted from the medical records...
September 27, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28955301/out-of-reference-range-thyroid-stimulating-hormone-levels-in-levothyroxine-treated-primary-hypothyroid-patients-a-multicenter-observational-study
#9
Dilek Gogas Yavuz, Dilek Yazıcı, Lezzan Keskin, Ayşegül Atmaca, Seda Sancak, Fulden Saraç, İbrahim Şahin, Oğuz Dikbaş, Zeliha Hekimsoy, Serap Yalın, Melin Uygur, Murat Yılmaz, Sibel Yirmibeşcik, Özlem Asmaz
OBJECTIVE: Although levothyroxine (LT4) replacement therapy for hypothyroidism has been established as safe, inexpensive and effective, many studies from different countries reported out-of-reference range thyroid-stimulating hormone (TSH) values for the hypothyroid patients under LT4 treatment. The aim of this study was to determine TSH levels of primary hypothyroid patients under LT4 treatment and to assess self-reported compliance with daily LT4 intake in tertiary care centers in Turkey...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28944001/recurrent-graves-hyperthyroidism-after-prolonged-radioiodine-induced-hypothyroidism
#10
REVIEW
Fariha Salman, Hooman Oktaei, Solomon Solomon, Ebenezer Nyenwe
BACKGROUND: Radioactive iodine (RAI) is the most cost effective therapy for Graves' disease (GD). Patients with GD who have become hypothyroid after therapeutic RAI, rarely develop recurrence of disease. Herein we describe a case of recurrence of thyrotoxicosis after 2 years of hypothyroidism. METHODS: We present the clinical features, laboratory findings, imaging and management of an unusual case of recurrent hyperthyroidism. RESULTS: A 48-year-old male presented to the emergency room with a 2-day history of palpitation, chest discomfort and 30 pounds of weight loss...
July 2017: Therapeutic Advances in Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28911144/randomized-trial-comparing-two-algorithms-for-levothyroxine-dose-adjustment-in-pregnant-women-with-primary-hypothyroidism
#11
RANDOMIZED CONTROLLED TRIAL
Shannon D Sullivan, Erin Downs, Geanina Popoveniuc, Alexander Zeymo, Jacqueline Jonklaas, Kenneth D Burman
Context: Regulation of maternal thyroid hormones during pregnancy is crucial for optimal maternal and fetal outcomes. There are no specific guidelines addressing maternal levothyroxine (LT4) dose adjustments throughout pregnancy. Objective: To compare two LT4 dose-adjustment algorithms in hypothyroid pregnant women. Design: Thirty-three women on stable LT4 doses were recruited at <10 weeks gestation during 38 pregnancies and randomized to one of two dose-adjustment groups...
September 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28904805/high-dose-levothyroxine-for-the-management-of-bipolar-affective-disorder-two-case-reports
#12
Andy Zamar, Gurvinder Warrya, Christos Kouimtsidis
In this article, we report two cases from our centre: case A has the longest recovery period and case B is one of the most complex from a diagnostic and management perspective, highlighting how treatment resistance can be overcome depending on patient response and needs.
September 2017: JRSM Open
https://www.readbyqxmd.com/read/28894436/serum-thyroid-hormone-antibodies-are-frequent-in-patients-with-polyglandular-autoimmune-syndrome-type-3-particularly-in-those-who-require-thyroxine-treatment
#13
Roberto Vita, Maria Giulia Santaguida, Camilla Virili, Maria Segni, Marina Galletti, Mattia Mandolfino, Flavia Di Bari, Marco Centanni, Salvatore Benvenga
Polyglandular autoimmune syndrome (PAS) type 3 consists of autoimmune thyroid disease (AITD) coexisting with ≥1 non-thyroidal autoimmune disease (NTAID) other than Addison's disease and hypoparathyroidism. We evaluated the prevalence and repertoire of thyroid hormones antibodies (THAb) in PAS-3 patients. Using a radioimmunoprecipation technique, we measured THAb (T3IgM, T3IgG, T4IgM, and T4IgG) in 107 PAS-3 patients and 88 controls (patients with AITD without any NTAID). Based on the selective coexistence of AITD with one NTAID (chronic autoimmune gastritis, non-segmental vitiligo or celiac disease), patients were divided into group 1 (chronic autoimmune gastritis positive, n = 64), group 2 (non-segmental vitiligo positive, n = 24), and group 3 (celiac disease positive, n = 15)...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28884595/risk-of-osteoporosis-in-thyroid-cancer-patients-using-levothyroxine-a-population-based-study
#14
Shih-Yi Lin, Cheng-Li Lin, Hsien-Te Chen, Chia-Hung Kao
BACKGROUND: The outcomes of thyroid cancer patients using levothyroxine are largely undetermined. METHODS: The study population consisted of 9,398 patients newly diagnosed with thyroid cancer; their data was retrieved from a subset of the National Health Insurance Research Database of Taiwan during the period of 1999-2011. In this nationwide retrospective cohort study, we compared the risk of osteoporosis among thyroid cancer patients with levothyroxine use, those without levothyroxine use, and propensity score-matched nonthyroid controls...
September 8, 2017: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/28828345/evaluation-of-bone-density-serum-total-and-ionized-calcium-alkaline-phosphatase-and-25-hydroxy-vitamin-d-in-papillary-thyroid-carcinoma-and-their-relationship-with-tsh-suppression-by-levothyroxine
#15
Ali Kachui, Seyed Mashaallah Tabatabaizadeh, Bijan Iraj, Hasan Rezvanian, Awat Feizi
BACKGROUND: This study aimed to evaluate the situation of Bone Mineral Density (BMD), Z score, T score, serum level of corrected and ionized calcium, alkaline phosphatase and 25-hydroxy vitamin D in percutaneous transhepatic cholangiography (PTC) patients and correlation of these variants with thyroid stimulating hormone (TSH) suppression level by levothyroxine. MATERIALS AND METHODS: Among the patients referred to Esfahan's endocrinology research center, 34 PTC patients (aged 20-50 years) with a history of thyroidectomy and conceived radioactive iodine and suppressive dose of levothyroxine were evaluated in this case-control study, and 38 healthy persons participated as the control group (matched by age and sex, body mass index)...
2017: Advanced Biomedical Research
https://www.readbyqxmd.com/read/28804208/benign-course-after-acute-high-dose-levothyroxine-intoxication-in-a-3-year-old-boy
#16
Stan Hartman, Kees Noordam, Machiel Maseland, Petra van Setten
Acute ingestion of thyroid hormone preparations is a common intoxication, with 181 cases in children <12 yr in 2009 in the Netherlands, but generally has a mild course. However, some reports show that even low dosages may cause serious events such as seizures, thyroid storm and coma. We report a 3 yr old boy case with an acute intoxication with high dose levothyroxine (0.5 mg/kg). We describe the proper management of levothyroxine intoxication in children. A 3-year-old boy with no notable medical history ingested sixty tablets of levothyroxine 150 µg...
2017: Clinical Pediatric Endocrinology: Case Reports and Clinical Investigations: Official Journal of the Japanese Society for Pediatric Endocrinology
https://www.readbyqxmd.com/read/28794850/dual-control-of-pituitary-thyroid-stimulating-hormone-secretion-by-thyroxine-and-triiodothyronine-in-athyreotic-patients
#17
Rudolf Hoermann, John E M Midgley, Johannes W Dietrich, Rolf Larisch
BACKGROUND: Patient responses to levothyroxine (LT4) monotherapy vary considerably. We sought to differentiate contributions of FT4 and FT3 in controlling pituitary thyroid stimulating hormone (TSH) secretion. METHODS: We retrospectively assessed the relationships between TSH and thyroid hormones in 319 patients with thyroid carcinoma through 2914 visits on various LT4 doses during follow-up for 5.5 years (median, IQR 4.2, 6.9). We also associated patient complaints with the relationships...
June 2017: Therapeutic Advances in Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28741453/no-effect-of-levothyroxine-and-levothyroxine-induced-subclinical-thyrotoxicosis-on-the-pharmacokinetics-of-sorafenib-in-healthy-male-subjects
#18
Funan Huang, Antoinette Ajavon, Erya Huang, John Lettieri, Rong Liu, Carol Peña, Matthias Berse
BACKGROUND: 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 thyrotropin (TSH) suppression. In the Phase 3 DTC trial (DECISION), sorafenib exposure was approximately twofold higher than that observed in other cancers. This study 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 patients with DTC...
September 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/28697824/-analysis-of-treatment-efficacy-for-congenital-hypothyroidism-in-some-regions-of-yunnan-province-china
#19
Jing-Hui Yang, Jing-Hui Zhang, Yin-Hong Zhang, Xiao-Zhi Xu, Hong Chen, Yuan Li, Yan Jiang, Zheng Wang, Bao-Sheng Zhu, Li Li
OBJECTIVE: To observe the effects of initial doses and treatment timing of levothyroxine (L-T4) on the clinical efficacy in children with congenital hypothyroidism (CH). METHODS: This study included 98 children who had an abnormal level of thyroid stimulating hormone (TSH) in neonatal screening in four regions of Yunnan Province and who finally had a confirmed diagnosis of CH. They received treatment with L-T4 and were divided into standard dose group (10-15 μg/kg per day) and low dose group (<10 μg/kg per day) by the therapeutic dose of L-T4...
July 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28695483/diagnosis-and-management-of-treatment-refractory-hypothyroidism-an-expert-consensus-report
#20
REVIEW
M Centanni, S Benvenga, I Sachmechi
There is a frequently encountered subset of hypothyroid patients who are refractory to standard thyroid hormone replacement treatment and require unexpectedly high doses of levothyroxine. In addition to clinical situations where hypothyroid patients are non-compliant, or where there is the possibility of excipient-induced disease exacerbation (gluten/celiac disease), therapeutic failure may be due to impaired absorption of the administered drug. The common approach to managing patients with unusual thyroxine needs is to escalate the dose of levothyroxine until targeted TSH levels are achieved...
July 10, 2017: Journal of Endocrinological Investigation
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