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https://www.readbyqxmd.com/read/29624097/positive-thyrotropin-receptor-antibodies-in-patients-with-transient-thyrotoxicosis
#1
Trevor E Angell, Olivia Van Benschoten, David A Cohen, Andrea V Haas, Erik K Alexander, Ellen Marqusee
OBJECTIVE: Thyrotropin (TSH) receptor antibody (TRAb) testing is considered accurate for the diagnosis of Graves' disease (GD), and had been identified rarely in thyrotoxic patients without GD. We describe four patients with transient thyrotoxicosis and positive TRAb to highlight this clinical possibility. METHODS: Patient demographics, symptoms, laboratory findings, and time to resolution of thyrotoxicosis are summarized. TRAb testing was performed by either a third-generation thyrotropin binding inhibitory immunoglobulin competitive binding assay (TBII) or a thyroid stimulating antibody bioassay (TSI) from either Mayo Clinic Laboratory or Quest Diagnostics...
April 6, 2018: Endocrine Practice
https://www.readbyqxmd.com/read/29615904/canonical-tsh-regulation-of-cathepsin-mediated-thyroglobulin-processing-in-the-thyroid-gland-of-male-mice-requires-taar1-expression
#2
Maria Qatato, Joanna Szumska, Vladislav Skripnik, Eddy Rijntjes, Josef Köhrle, Klaudia Brix
Trace amine-associated receptor 1 (Taar1) has been suggested as putative receptor of thyronamines. These are aminergic messengers with potential metabolic and neurological effects countering their contingent precursors, the thyroid hormones (THs). Recently, we found Taar1 to be localized at the primary cilia of rodent thyroid epithelial cells in vitro and in situ . Thus, Taar1 is present in a location of thyroid follicles where it might be involved in regulation of cathepsin-mediated proteolytic processing of thyroglobulin, and consequently TH synthesis...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29615476/neuronostatin-exerts-actions-on-pituitary-that-are-unique-from-its-sibling-peptide-somatostatin
#3
Raul M Luque, Rhonda D Kineman
Neuronostatin, a somatostatin gene-encoded peptide, exerts important physiological and metabolic actions in diverse tissues. However, the direct biological effects of neuronostatin on pituitary function of humans and primates are still unknown. This study used baboon (Papio anubis) primary pituitary cell cultures, a species that closely models human physiology, to demonstrate that neuronostatin inhibits basal, but not ghrelin-/GnRH-stimulated, GH and LH secretion in a dose- and time-dependent fashion, without affecting the secretion of other pituitary hormones (prolactin, ACTH, FSH, TSH) or changing mRNA levels...
April 3, 2018: Journal of Endocrinology
https://www.readbyqxmd.com/read/29605392/prediction-of-neonatal-hyperthyroidism
#4
Maïa Banigé, Michel Polak, Dominique Luton
OBJECTIVES: To assess whether it is possible to identify the neonatal predictors of neonatal hyperthyroidism at the presymptomatic stage of the disease. STUDY DESIGN: This retrospective multicenter study in 10 maternity units was based on the medical records of all patients monitored for a pregnancy between January 1, 2007, and January 1, 2014. Among 280 000 births, 2288 medical records of women with thyroid dysfunction were selected and screened. Of these, 415 women had Graves disease and were positive for thyrotropin receptor antibody during pregnancy, and were included...
March 28, 2018: Journal of Pediatrics
https://www.readbyqxmd.com/read/29604363/in-vitro-fertilization-intracytoplasmic-insemination-and-thyroid-function-reviewing-the-evidence
#5
Gesthimani Mintziori, Dimitrios G Goulis
Recent findings, that specific G protein-coupled TSH receptors (TSHR) and the nuclear thyroid hormone receptors (THRs) are widely expressed in reproductive tissues, reveal the close links between hypothalamus - pituitary-thyroid and hypothalamus - pituitary-gonadal axes. It has been suggested that thyroid function as well as thyroid autoimmunity (TAI) have an impact on Assisted Reproduction Technology (ART) reproductive outcome. Lately, it became evident that ovarian stimulation (OS) may also have an impact on thyroid function...
March 28, 2018: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/29594059/severe-inflammatory-ophthalmopathy-in-a-euthyroid-patient-during-nivolumab-treatment
#6
Pauline Campredon, Philippe Imbert, Céline Mouly, Solange Grunenwald, Julien Mazières, Philippe Caron
Introduction: Nivolumab is a promising treatment in patients with advanced malignancies. Among immune-related adverse events, autoimmune thyroid disorders are frequently reported. Patient: A 61-year-old male patient had no history of familial or personal thyroid disease. In 2012, this patient, a heavy smoker, presented with non-small-cell lung cancer that was treated with radiotherapy and chemotherapy. In 2015, the cancer progressed with cervical compressive symptoms, and the patient was treated with nivolumab...
March 2018: European Thyroid Journal
https://www.readbyqxmd.com/read/29594055/occurrence-of-graves-orbitopathy-and-graves-hyperthyroidism-after-a-trauma-to-the-eye
#7
Elena Sabini, Ilaria Ionni, Roberto Rocchi, Paolo Vitti, Claudio Marcocci, Michele Marinò
Background: Graves' orbitopathy (GO) is believed to be the consequence of autoimmunity against antigens that are present both in the thyroid and orbital tissues. Massive release of thyroid antigens causes the appearance or deterioration of GO in patients with Graves' hyperthyroidism (GH), as it occurs following radioiodine treatment. In theory, a similar release of autoantigens may occur at the eye level, for example due to an orbital trauma or surgical manipulation. To our knowledge, this is the first report of a case of de novo appearance of GO and then GH after an eye trauma, possibly reflecting spreading of autoantigens and activation of the immune system against shared orbital and thyroid antigens...
January 2018: European Thyroid Journal
https://www.readbyqxmd.com/read/29556396/longer-trinucleotide-repeats-of-androgen-receptor-are-associated-with-higher-testosterone-and-low-oxytocin-levels-in-diabetic-premature-ejaculatory-dysfunction-patients
#8
Haroon Latif Khan, Shahzad Bhatti, Sana Abbas, Yousaf Latif Khan, Rosa Maria Marquez Gonzalez, Muhammad Aslamkhan, Gerardo Rodriguez Gonzalez, Hikmet Hakan Aydin
Background: Despite its worldwide high occurrence, the obscurity regarding the description, epidemiology and management of premature ejaculation remains provocative. It is well established that male premature ejaculatory dysfunction is an increasing problem due to spontaneous ejaculation across a variety of general and clinical subjects. The main goal of this study was to determine the relationships between trinucleotide repeats of the androgen receptor (AR), sex steroids, and pituitary hormones with sexual function in men with type 2 diabetes mellitus (DM) and reported with acquired premature ejaculation (PE)...
2018: Basic and Clinical Andrology
https://www.readbyqxmd.com/read/29544020/thyroid-stimulating-hormone-and-bone-mineral-density-evidence-from-a-two-sample-mendelian-randomization-study-and-a-candidate-gene-association-study
#9
Nicolien A Van Vliet, Raymond Noordam, Jan B Van Klinken, Rudi G J Westendorp, J H Duncan Bassett, Graham R Williams, Diana Van Heemst
With population aging, prevalence of low bone mineral density (BMD) and associated fracture risk are increased. To determine whether low circulating thyroid stimulating hormone (TSH) levels within the normal range are causally related to BMD, we conducted a two-sample Mendelian randomization (MR) study. Furthermore, we tested whether common genetic variants in the TSH receptor (TSHR) gene and genetic variants influencing expression of TSHR (eQTLs) are associated with BMD. For both analyses, we used summary-level data of genome-wide association studies (GWAS) investigating BMD of the femoral neck (N = 32,735) and the lumbar spine (N = 28,498) in cohorts of European ancestry from the Genetic Factors of Osteoporosis (GEFOS) Consortium...
March 15, 2018: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29531156/clinical-diagnosis-of-graves-or-non-graves-hyperthyroidism-compared-to-tsh-receptor-antibody-test
#10
Lauren Bell, Ann Louise Hunter, Angelos Kyriacou, Annice Mukherjee, Akheel A Syed
BACKGROUND: TSH receptor antibody (TRAb) is considered the gold standard diagnostic test for the autoimmunity of Graves' disease (GD), which is commonly diagnosed clinically. AIM: To evaluate the true positive (sensitivity) and true negative (specificity) rates of clinical diagnosis of GD or non-GD hyperthyroidism compared to the TRAb test. SETTING: University teaching hospital in North West England Participants: Patients in the Endocrinology service who had a TRAb measurement between December 2009 and October 2015 Methods: Electronic patient records were studied retrospectively for a pre-TRAb clinical diagnosis of GD or non-GD hyperthyroidism...
March 12, 2018: Endocrine Connections
https://www.readbyqxmd.com/read/29526990/false-positive-tsh-receptor-antibody-a-pitfall-of-third-generation-tsh-receptor-antibody-measurements-in-neonates
#11
Michiko Wada, Makoto Kita, Kaoru Kawasaki, Toru Kusakabe, Tetsuya Tagami, Noriko Satoh-Asahara, Akira Shimatsu, Koshi Hashimoto
Maternal Graves' disease (GD) during pregnancy may influence thyroid function in fetuses. Neonates born to mothers with high serum TSH receptor antibody (TRAb) levels have been reported to develop 'neonatal GD'. Therefore, evaluations of serum thyroid hormone and TRAb levels in neonates upon birth are crucial for a prompt diagnosis. At delivery, we measured TRAb with third-generation TRAb test using an M22 human monoclonal antibody in neonates by collecting umbilical cord blood in a blood collection tube with lithium-heparin, which provides a whole blood/plasma sample...
March 10, 2018: Endocrine Journal
https://www.readbyqxmd.com/read/29507327/generation-and-characterization-of-a-hypothyroidism-rat-model-with-truncated-thyroid-stimulating-hormone-receptor
#12
Jianqiang Yang, Ning Yi, Junhui Zhang, Wen He, Di He, Wanwan Wu, Shuyang Xu, Feng Li, Guoping Fan, Xianmin Zhu, Zhigang Xue, Wensheng Zhou
Thyroid stimulating hormone receptor (TSHR), a G-protein-coupled receptor, is important for thyroid development and growth. In several cases, frameshift and/or nonsense mutations in TSHR were found in the patients with congenital hypothyroidism (CH), however they have not been functionally studied in an animal model. In the present work, we generated a unique TshrDf/Df rat model that recapitulates the phenotypes in TSHR Y444X patient by CRISPR/Cas genome editing technology. In this rat model, TSHR is truncated at the second transmembrane domain, leading to CH phenotypes as what was observed in the patients, including dwarf, thyroid aplasia, infertility, TSH resistant as well as low serum thyroid hormone levels...
March 5, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29506625/vdbp-vdr-mutations-and-other-factors-related-with-vitamin-d-metabolism-may-be-associated-with-type-1-diabetes-mellitus
#13
Deniz Kirac, Ceyda Dincer Yazan, Hazal Gezmis, Ali Yaman, Goncagul Haklar, Onder Sirikci, Elif Cigdem Altunok, Oguzhan Deyneli
Type 1 diabetes mellitus (T1DM) is an insulin dependent autoimmune disorder resulting the progressive destruction of pancreatic beta cells. Another possible factor considered to be related with T1DM is vitamin D deficiency. Therefore in this study it was aimed to investigate the associations between T1DM, vitamin D binding protein (VDBP) and vitamin D receptor (VDR) gene mutations which are related with vitamin D metabolism. Fifty five T1DM paitents and 40 healthy volunteers were recruited to the study. FokI (rs2228570), BsmI (rs1544410) mutations in VDR; rs4588 and rs7041 polymorphisms in VDBP were investigated with real-time polymerase chain reaction (RT-PCR)...
February 28, 2018: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/29498934/leptin-neuropeptide-y-npy-melatonin-and-zinc-levels-in-experimental-hypothyroidism-and-hyperthyroidism-relation-with-melatonin-and-the-pineal-gland
#14
Abdulkerim Kasım Baltaci, Rasim Mogulkoc
Background Melatonin, an important neurohormone released from the pineal gland, is generally accepted to exercise an inhibitor effect on the thyroid gland. Zinc mediates the effects of many hormones and is found in the structure of numerous hormone receptors. Aim The present study aims to examine the effect of melatonin supplementation and pinealectomy on leptin, neuropeptide Y (NPY), melatonin and zinc levels in rats with hypothyroidism and hyperthyroidism. Methods This study was performed on the 70 male rats...
March 2, 2018: Hormone Molecular Biology and Clinical Investigation
https://www.readbyqxmd.com/read/29498920/update-on-the-clinicopathology-of-pituitary-adenomas
#15
Chung Thong Lim, Márta Korbonits
Pituitary adenomas are the third most common central nervous system tumours and arise from the anterior pituitary within the pituitary fossa. The signs and symptoms of patients with pituitary adenomas vary from 'mass effects' caused by a large adenoma to features secondary to excess pituitary hormones produced by the functioning pituitary adenoma. Detailed histopathological assessment, based on novel classifications and the latest WHO guidelines, helps to categorise pituitary adenomas into different subtypes and identify features that, in some cases, help to predict their behaviour...
March 2, 2018: Endocrine Practice
https://www.readbyqxmd.com/read/29494342/hyperthyroidism-in-an-infant-of-a-mother-with-autoimmune-hypothyroidism-with-positive-tsh-receptor-antibodies
#16
Kriti Joshi, Margaret Zacharin
BACKGROUND: Neonatal hyperthyroidism is rare, seen in infants of mothers with Graves' disease (GD), with transplacental transfer of thyroid-stimulating hormone receptor (TSHR) antibodies (TRAbs). We describe a neonate with severe hyperthyroidism due to TRAbs, born to a mother with autoimmune hypothyroidism. CASE PRESENTATION: A baby boy born preterm at 35 weeks had irritability, tachycardia and proptosis after birth. The mother had autoimmune hypothyroidism, from age 10, with thyroxine replacement and normal thyroid function throughout her pregnancy...
March 1, 2018: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/29484896/three-cases-of-transient-hyperthyroidism-after-triptorelin-treatment-case-report-and-literature-review
#17
Junjun Miao, Qianhua Yan, Lijuan Wang, Xin Wang
The impacts of gonadtropin-releasing hormone (GnRH) agonists on thyroid function have long been observed and the conclusions were controversial. We here reported three cases of transient hyperthyroidisms after triptorelin therapy. The three patients showed decreased thyroid-stimulating hormone (TSH), with or without elevated free triiodothyronine (FT3) and free thyroxine (FT4) 2 weeks after injection of triptorelin. Thyroid-specific autoantibody assays showed antithyroid microsome autoantibody (TMAb) and (or) antithyroglobulin autoantibody (TgAb) were positive in two patients while and antithyrotropin receptor autoantibody (TRAb) were negative in all three cases...
February 27, 2018: Gynecological Endocrinology
https://www.readbyqxmd.com/read/29468987/antithyroid-drugs-inactivate-tsh-binding-to-the-tsh-receptor-by-their-reducing-action
#18
Yukio Ochi, Takashi Hachiya, Yukiko Koyama, Nobutoshi Fukuhori, Noriyuki Ashida
The effect of antithyroid drugs(ATDs)[methylmercaptoimidazole (MMI) and propylthiouracil (PTU)] and reducing agents (mercaptoethanol, dithiothreitol and cysteine) on bovine (b) TSH binding to human (h) and porcine (p) TSH receptor (R) was examined. (1) ATDs was pre-incubated with hTSHR coated tube for 1- 4 h, washed free of ATDs, and then 125I-bTSH binding to hTSHR after 1 h incubation was examined. MMI (10-40 mM) decreased 125I-bTSH binding in a dose-dependent manner and binding decreased proportionally as pre-incubation time increased from 1 to 4 h...
February 19, 2018: Endocrine, Metabolic & Immune Disorders Drug Targets
https://www.readbyqxmd.com/read/29452583/does-rituximab-improve-clinical-outcomes-of-patients-with-thyroid-associated-ophthalmopathy-a-systematic-review-and-meta-analysis
#19
Changjun Wang, Qingyao Ning, Kai Jin, Jiajun Xie, Juan Ye
BACKGROUND: The current therapies of thyroid-associated ophthalmopathy (TAO) were still a challenging matter. In this study, we aimed to contrast the impact of before- after rituximab (RTX) therapy in the patients with TAO. METHODS: We searched the PubMed, EMBASE, and SCOPUS databases for articles published up to July 3, 2017. Fixed- or random-effects meta-analysis was used to provide pooled estimates of standard mean difference (SMD) both the primary outcome from clinical activity score (CAS), and secondary outcomes from thyrotropin receptor antibody (TRAb), proptosis, thyroid stimulating hormone (TSH), and interleukin-6 (IL-6) levels...
February 17, 2018: BMC Ophthalmology
https://www.readbyqxmd.com/read/29435670/diagnostic-accuracy-of-a-new-fluoroenzyme-immunoassay-for-the-detection-of-tsh-receptor-autoantibodies-in-graves-disease
#20
Danilo Villalta, Federica D'Aurizio, Mirella Da Re, Debora Ricci, Francesco Latrofa, Renato Tozzoli
PURPOSE: Thyrotropin receptor (TSHR) autoantibodies (TRAbs) are a hallmark of Graves' disease (GD). The aim of this study was to evaluate the diagnostic accuracy of a new third generation automatic fluorescence enzyme immunoassay for TRAb measurement in GD, in comparison with two current IMAs. METHODS: Sera of 439 subjects (57 patients with untreated GD, 34 with treated GD, 15 with GD and Graves' orbitopathy, 52 with multinodular non-toxic goiter, 86 with Hashimoto's thyroiditis, 20 with toxic adenoma or toxic multinodular goiter, 55 with non-thyroid autoimmune diseases and 120 normal controls) were tested for TRAbs with the ELiA ™ anti-TSH-R assay (ThermoFischer Scientific, Uppsala, Sweden), the TRAK ™ RIA, Brahms (Thermo Scientific, Hennigsdorf, Germany) and the Immulite ™ TSI assay (Siemens Healthcare, Llanberis, UK)...
February 12, 2018: Auto- Immunity Highlights
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