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Paula Viviani, Adrian Lifschitz, Jorge García, María Laura Maté, Miguel Angel Quiroga, Carlos Lanusse, Guillermo Virkel
1. Precision-cut liver slices (PCLS) from food-producing animals have not been extensively used to study xenobiotic metabolism, and thus information on this field of research is sparse. 2. The aims of the present work were to further validate the technique of production and culture of bovine PCLS and to characterize the metabolic interaction between the anthelmintic albendazole (ABZ) and the flavin-monooxygenase (FMO) inhibitor methimazole (MTZ). 3. Nine (9) steers were used as donors. PCLS were produced and incubated under two methods, a dynamic organ culture (DOC) incubator and a well-plate (WP) system...
October 21, 2016: Xenobiotica; the Fate of Foreign Compounds in Biological Systems
Kenzo J Koike, Jeffrey P Blice, Jan A Kylstra, Jonathan S Ralston, Sally E Self, Natasha M Ruth, Lucian V Del Priore
PURPOSE: To describe an unusual case of frosted branch angiitis that developed in a patient with acute onset systemic vasculitis possibly triggered by the antithyroid medication methimazole. METHODS: We conducted a thorough review of the medical records of a 16-year-old female patient who presented with frosted branch angiitis. During the initial hospital admission, the patient underwent an extensive systemic workup to determine the etiology of her disease and ophthalmologic testing including fundus photographs and fluorescein angiography...
October 5, 2016: Retinal Cases & Brief Reports
Sudipa Sarkar, Lindsay A Bischoff
Hyperthyroidism can occur during pregnancy and the postpartum period, and the treatment of hyperthyroidism should be considered in the preconception phase. Pregnancy has multiple normal physiologic effects on thyroid hormone, which is a separate process distinct from syndromes such as transient hyperthyroidism of hyperemesis gravidarum. The rationale regarding antithyroid drug use during different stages of pregnancy is reviewed, including the literature regarding adverse neonatal outcomes such as aplasia cutis and methimazole embryopathy in the setting of first trimester maternal methimazole use...
October 14, 2016: Seminars in Reproductive Medicine
Zdeňka Límanová, Jan Jiskra
Cardiovascular system is essentially affected by thyroid hormones by way of their genomic and non-genomic effects. Untreated overt thyroid dysfunction is associated with higher cardiovascular risk. Although it has been studied more than 3 decades, in subclinical thyroid dysfunction the negative effect on cardiovascular system is much more controversial. Large meta-analyses within last 10 years have shown that subclinical hyperthyroidism is associated with higher cardiovascular risk than subclinical hypothyroidism...
2016: Vnitr̆ní Lékar̆ství
M Leo, L Bartalena, G Rotondo Dottore, E Piantanida, P Premoli, I Ionni, M Di Cera, E Masiello, L Sassi, M L Tanda, F Latrofa, P Vitti, C Marcocci, M Marinò
OBJECTIVE: In spite of previous conflicting results, an adjuvant role of selenium in the treatment of Graves' disease (GD) hyperthyroidism has been proposed. To address this issue, a randomized clinical trial was carried out aimed at investigating whether selenium is beneficial on the short-term control of GD hyperthyroidism treated with methimazole (MMI). METHODS: Thirty newly diagnosed hyperthyroid GD patients were randomly assigned to treatment with: (i) MMI or (ii) MMI plus selenium...
October 12, 2016: Journal of Endocrinological Investigation
Marenza Leo, Teresa Mautone, Ilaria Ionni, Maria Antonietta Profilo, Elena Sabini, Francesca Menconi, Barbara Mazzi, Roberto Rocchi, Francesco Latrofa, Marco Nardi, Paolo Vitti, Claudio Marcocci, Michele Marinò
OBJECTIVE: Intravenous (iv) glucocorticoids (GC) (ivGC) are used for active Graves orbitopathy (GO), but factors affecting GO outcome are poorly understood. We performed a retrospective study to investigate the variables affecting GO after ivGC. METHODS: We evaluated 83 consecutive GO patients treated with ivGC but not orbital radiotherapy (ORT) and re-examined them after a median of 47 months. The endpoints were the relationships between GO outcome or additional treatments with age, sex, smoking habits, thyroid volume, thyroid treatment, time since thyroid treatment, antithyroid-stimulating hormone receptor antibodies (TRAb), GO duration, GO features, and follow-up time...
October 2016: Endocrine Practice
Tianyi He, Ruxing Zhao, Yiran Lu, Wenjuan Li, Xinguo Hou, Yu Sun, Ming Dong, Li Chen
Purpose. To investigate the effects of Corbrin Capsule (CS-C-Q80), a drug derived from Cordyceps sinensis (Berk.) Sacc., on autoimmune thyroid diseases (AITD). Methods. 44 Patients with Graves's disease (GD) and 56 patients with Hashimoto's thyroiditis (HT) were randomly assigned to treatment group (GD-Tx and HT-Tx) or control group (GD-Ct and HT-Ct). The control groups were given methimazole or levothyroxine only while the treatment groups were given Corbrin Capsule (2.0 g tid) besides the same conventional prescriptions as control groups...
2016: Evidence-based Complementary and Alternative Medicine: ECAM
Christopher K Thompson, Hollis T Cline
: Thyroid hormone (TH) regulates many cellular events underlying perinatal brain development in vertebrates. Whether and how TH regulates brain development when neural circuits are first forming is less clear. Furthermore, although the molecular mechanisms that impose spatiotemporal constraints on TH action in the brain have been described, the effects of local TH signaling are poorly understood. We determined the effects of manipulating TH signaling on development of the optic tectum in stage 46-49 Xenopus laevis tadpoles...
October 5, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
J Rodríguez-Castelán, A Corona-Pérez, L Nicolás-Toledo, M Martínez-Gómez, F Castelán, E Cuevas-Romero
Hypothyroidism is associated with the development of non-alcoholic steatohepatitis, but cellular mechanisms have been scarcely analyzed. Thyroid hormones regulate the synthesis and secretion of bile acids that are endogenous ligands of the farnesoid receptor (FXRα), which have been involved in the development of non-alcoholic steatohepatitis. However, the relationship between thyroid hormones and FXRα expression in the liver is yet unknown. Control (n=6) and methimazole-induced hypothyroid (n=6) female rabbits were used to evaluate the amount of lipids and glycogen, vascularization, hepatocytes proliferation, immune cells infiltration, and expression of FXRα...
October 4, 2016: Experimental and Clinical Endocrinology & Diabetes
B Szeiffová Bačová, T Egan Beňová, C Viczenczová, T Soukup, H Rauchová, S Pavelka, V Knezl, M Barančík, N Tribulová
Thyroid hormones are powerful modulators of heart function and susceptibility to arrhythmias via both genomic and non-genomic actions. We aimed to explore expression of electrical coupling protein connexin-43 (Cx43) in the heart of rats with altered thyroid status and impact of omega-3 polyunsaturated fatty acids (omega-3) supplementation. Adult male Lewis rats were divided into following six groups: euthyroid controls, hyperthyroid (treated with T(3)) and hypothyroid (treated with methimazol) with or without six-weeks lasting supplementation with omega-3 (20 mg/100 g/day)...
September 19, 2016: Physiological Research
Onyebuchi E Okosieme, John H Lazarus
INTRODUCTION: Graves' hyperthyroidism is associated with significant morbidity and mortality risk. The thionamides, methimazole, its pro-drug derivative carbimazole, and propylthiouracil, remain a cornerstone of management. Yet despite decades of use, optimal strategies for maximising treatment response and curtailing adverse effect risk remains uncertain. AREAS COVERED: We reviewed the current literature on the evidence based medical management of Graves' disease...
October 2016: Expert Opinion on Pharmacotherapy
Erdoğan Özgür, Börte Gürbüz Özgür, Hatice Aksu, Gökhan Cesur
OBJECTIVE: The aim of this study was to investigate the depression-like behaviors of juvenile rats with congenital and postnatal hypothyroidism. METHODS: Twenty seven newborn rat pups were used. First, 6-month old Wistar Albino female rats were impregnated. Methimazole (0.025% wt/vol) was given to dam rats from the first day of pregnancy until postnatal 21 days (P21) to generate pups with congenital hypothyroidism (n=8), whereas in the postnatal hypothyroidism group (n=10) methimazole was given from P0 to P21...
September 9, 2016: Journal of Clinical Research in Pediatric Endocrinology
Vinuta Mohan, Robert Lind
Graves' disease is the most common cause of hyperthyroidism. If left untreated, patients may have multiple systemic complications such as cardiac, reproductive, and skeletal disease. Thionamides, such as methimazole and propylthiouracil, and I(131) iodine ablation are the most commonly prescribed treatment for Graves' disease. Total thyroidectomy is often overlooked for treatment and is usually only offered if the other options have failed. In our case, we discuss a patient who was admitted to our medical center with symptomatic hyperthyroidism secondary to long-standing Graves' disease...
2016: Journal of Community Hospital Internal Medicine Perspectives
Jayant Gite, Rohit Shrivastav, Nikhil Bhasin, Puneet Mashru, Manish Itolikar, Milind Y Nadkar
Hirata disease is a rare disease characterised by recurrent episodes of hypoglycaemia due to anti-insulin antibody. In most of these cases causative agents were sulfhydryl containing compounds like Penicillamine, Glutathione, and Methimazole. The presentation of disease closely mimics insulinoma. We report 52 years female patient presenting with recurrent episodes of hypoglycaemia due to anti-insulin antibody. On evaluation, underlying cause of antibody was found to be monoclonal gammopathy of unknown significance (MGUS)...
October 2015: Journal of the Association of Physicians of India
Vidya Puthenpura, Kinjal Desai, Andrew Bauer, Ian Marshall
BACKGROUND: Agranulocytosis is regarded as a rare side effect of methimazole (MMI) therapy that occurs in a dose dependent manner and that usually develops within the first 3-6 months of treatment. Although delayed development beyond this timeline has been documented in adults, very few children have been reported with this presentation. CASE PRESENTATION: We present a 6-year old patient who developed agranulocytosis 18 months after the start of MMI therapy. CONCLUSIONS: This is an unusual case of a 6-year old patient who developed this serious side effect on stable MMI therapy well beyond the typical timeline...
2016: International Journal of Pediatric Endocrinology
Barbara Szeiffová Bačová, Csilla Vinczenzová, Jitka Žurmanová, Dita Kašparová, Vladimír Knezl, Tamara Egan Beňová, Stanislav Pavelka, Tomáš Soukup, Narcisa Tribulová
We aimed to study the impact of altered thyroid status on myocardial expression of electrical coupling protein connexin-43 (Cx43), the susceptibility of rats to ventricular fibrillation (VF) and the effects of antioxidant-rich red palm oil (RPO). Adult male and female euthyroid, hyperthyroid (treated with T3/T4), hypothyroid (treated with methimazole) Wistar rats supplemented or not with RPO for 6 weeks were used. Function of isolated perfused heart and VF threshold were determined. Left ventricular tissue was used for assessment of mRNA and protein levels of Cx43, its phosphorylated forms and topology...
September 6, 2016: Histochemistry and Cell Biology
Klaus Mann, Gerhard Hintze
Endocrine disorders may have an important influence on fertility, the course of a pregnancy and fetal development. For example, fertility is decreased and the risk of miscarriage is increased in women with autoimmune disorders, such as Addison's disease or autoimmune thyroiditis. Treatment of endocrine diseases in many cases has to be adapted during the course of a pregnancy. In patients with Addison's disease the dosage of hydrocortisone necessarily has to be increased. This is also valid for the time of delivery...
September 2016: Deutsche Medizinische Wochenschrift
Tawfik A Saleh, Mutasem M Al-Shalalfeh, Abdulaziz A Al-Saadi
Graphene functionalized with polyamidoamine dendrimer, decorated with silver nanoparticles (G-D-Ag), was synthesized and evaluated as a substrate with surface-enhanced Raman scattering (SERS) for methimazole (MTZ) detection. Sodium borohydride was used as a reducing agent to cultivate silver nanoparticles on the dendrimer. The obtained G-D-Ag was characterized by using UV-vis spectroscopy, scanning electron microscope (SEM), high-resolution transmission electron microscope (TEM), Fourier-transformed infrared (FT-IR) and Raman spectroscopy...
2016: Scientific Reports
Elena García Lobato, Claudia García Lobato, Daniel Briegas Morera, Juan Francisco Rangel Mayoral
No abstract text is available yet for this article.
September 2016: Farmacia Hospitalaria
Sepideh Safayee, Narges Karbalaei, Ali Noorafshan, Elham Nadimi
Thyroid hormones have important role in metabolism and impairment of glucose metabolism and insulin secretion has been shown in hypothyroid rats but the exact mechanisms for this defect are poorly understood. The aim of this study was to investigate the effect of hypothyroidism on oxidative stress parameters, insulin secretory pathway and histomorphometric changes of pancreas. In the isolated islets of the control and methimazole -treated hypothyroid insulin secretion and content, ATP production, Glucokinase, and hexokinase specific activity and kATP and L-type channels sensitivity were assayed...
August 26, 2016: European Journal of Pharmacology
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