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Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam, The Netherlands
Amsterdam Reproduction & Development Research Institute, Amsterdam, The Netherlands
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Department of Pediatric Endocrinology, Emma Children’s Hospital, Amsterdam UMC, location University of Amsterdam, Amsterdam, The Netherlands
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Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam, The Netherlands
Amsterdam Reproduction & Development Research Institute, Amsterdam, The Netherlands
Endocrine Laboratory, Department of Laboratory Medicine, Amsterdam UMC, location Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
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Department of Pediatric Endocrinology, Emma Children’s Hospital, Amsterdam UMC, location University of Amsterdam, Amsterdam, The Netherlands
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predicted value (currently 21%) while maintaining the current sensitivity of central CH detection ( 12 ). Primary congenital hypothyroidism Primary CH is caused by a defect at the level of the thyroid and is the most common form of CH, with a
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Endocrine Laboratory, Department of Clinical Chemistry, Amsterdam Gastroenterology, Endocrinology & Metabolism, Amsterdam UMC, Vrije Universiteit, Amsterdam, The Netherlands
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). CH-C, central congenital hypothyroidism; FP, false-positive; NBS, newborn screening; RI, reference interval; T4, thyroxine; TBG, thyroxine-binding globulin. All CH-C patients had a TBG concentration within or above the TBG RI, except for one
Laboratorio 6, Departamento de Farmacobiología, Centro de Investigación y de Estudios Avanzados-Instituto Politécnico Nacional, Delegación Tlalpan, Ciudad de México, México
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bodyweight with a mild reduction in their energy intake. Meanwhile, the congenital hypothyroid animals with the hypercaloric diet had a marked increase in their bodyweight since week 34 of treatment with an increase in their energy intake, presenting central
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Department of Pharmacology and Therapeutics, McGill University, Montreal, Quebec, Canada
Integrated Program in Neuroscience, McGill University, Montreal, Quebec, Canada
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Introduction Congenital central hypothyroidism (CCH) may affect as many as one in 13,000 people ( 1 ). In CCH, thyroid hormone levels are low to low-normal without the expected increases in thyrotropin (TSH), implicating defects in the brain
Amsterdam Gastroenterology, Endocrinology and Metabolism, Amsterdam, The Netherlands
Department of Laboratory Medicine, Endocrine Laboratory, Amsterdam UMC location University of Amsterdam, Meibergdreef, Amsterdam, The Netherlands
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Department of Computer Science, Vrije Universiteit, Boelelaan, Amsterdam, The Netherlands
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Amsterdam Public Health, Amsterdam, The Netherlands
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Department of Endocrinology and Metabolism, Amsterdam UMC location University of Amsterdam, Meibergdreef, Amsterdam, The Netherlands
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Department of Paediatric Endocrinology, Emma Children’s Hospital, Amsterdam UMC, University of Amsterdam, Meibergdreef, Amsterdam, The Netherlands
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Department of Paediatric Endocrinology, Emma Children’s Hospital, Amsterdam UMC, University of Amsterdam, Meibergdreef, Amsterdam, The Netherlands
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Amsterdam Gastroenterology, Endocrinology and Metabolism, Amsterdam, The Netherlands
Department of Laboratory Medicine, Endocrine Laboratory, Amsterdam UMC location University of Amsterdam, Meibergdreef, Amsterdam, The Netherlands
Amsterdam Reproduction & Development Research Institute, Amsterdam, The Netherlands
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Department of Pediatrics, Division of Metabolic Disorders, Emma Children’s Hospital, Amsterdam UMC, University of Amsterdam, Meibergdreef, Amsterdam, The Netherlands
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Department of Laboratory Medicine, Amsterdam UMC, Vrije Universiteit, Boelelaan, Amsterdam, The Netherlands
Department of Laboratory Medicine, Amsterdam UMC, University of Amsterdam, Meibergdreef, Amsterdam, The Netherlands
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Department of Laboratory Medicine, Endocrine Laboratory, Amsterdam UMC location University of Amsterdam, Meibergdreef, Amsterdam, The Netherlands
Amsterdam Reproduction & Development Research Institute, Amsterdam, The Netherlands
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Introduction Congenital hypothyroidism (CH), an inborn thyroid hormone (TH) deficiency, can be divided into primary (or thyroidal) CH and central (or secondary) CH. Primary CH is most prevalent and results from an un(der)developed thyroid
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Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
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Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
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Brown RS Wassner AJ . Liothyronine improves biochemical control of congenital hypothyroidism in patients with central resistance to thyroid hormone . Journal of Pediatrics 2016 175 167 .e1 – 172.e1 . ( https://doi.org/10.1016/j.jpeds.2016.04.022 )
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Background:
Mutations in TBL1X, part of the NCoR1/SMRT corepressor complex, were identified in patients with hereditary X-linked central congenital hypothyroidism and associated hearing loss. The role of TBL1X in thyroid hormone (TH) action, however, is incompletely understood. The aim of the present study was to investigate the role of TBL1X on T3 regulated gene expression in two human liver cell models.
Methods:
A human hepatoma cell line (HepG2) wherein TBL1X was down regulated using siRNAs, and human-induced pluripotent stem cell-derived hepatocytes (iHeps) generated from individuals with a TBL1X N365Y mutation. Both cell types were treated with increasing concentrations of T3. The expression of T3 regulated genes was measured by qPCR.
Results:
KLF9, CPT1A and PCK1 mRNA expression was higher upon T3 stimulation in the HepG2 cells with decreased TBL1X expression compared to controls, while DIO1 mRNA expression was lower. Hemizygous TBL1X N365Y iHeps exhibited decreased expression of CPT1A, G6PC1, PCK1, FBP1 and ELOVL2 compared to cells with the heterozygous TBL1X N365Y, but KLF9 and HMGCS2 expression was unaltered.
Conclusion:
Downregulation of TBL1X in HepG2 cells and the TBL1X N365Y variant in iHeps have differential effects on T3 regulated gene expression. This suggests that TBL1X may play a gene context role in thyroid hormone TH action.
Division of Endocrine and Metabolic Diseases, IRCCS Istituto Auxologico Italiano, Milan, Italy
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Division of Endocrine and Metabolic Diseases, IRCCS Istituto Auxologico Italiano, Milan, Italy
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University Hospital Heidelberg, Heidelberg, Germany
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–568. 3 Zwaveling-Soonawala N, van Trotsenburg AS, Verkerk PH: The severity of congenital hypothyroidism of central origin should not be underestimated. J Clin Endocrinol Metab<italic></italic> 2015; 100:E297–E300. 4 Price A, Weetman AP
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The Rappaport Faculty of Medicine, Technion, Institute of Technology, Haifa, Israel
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primary congenital hypothyroidism (CH) ( 17 , 18 ). The potential effects of maternal thyroid disease on offspring have led to the clinical practice of recommending serum thyroid function tests (TFT), including free T4 (FT4) and TSH, in infants born to
Pediatric Department B, Ha’Emek Medical Center, Afula, Israel
Rappaport Faculty of Medicine, Technion – Israel Institute of Technology, Haifa, Israel
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Rappaport Faculty of Medicine, Technion – Israel Institute of Technology, Haifa, Israel
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Rappaport Faculty of Medicine, Technion – Israel Institute of Technology, Haifa, Israel
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GGA – Galil Genetic Analysis Laboratory Ltd., Kazerin, Israel
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Rappaport Faculty of Medicine, Technion – Israel Institute of Technology, Haifa, Israel
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result in hearing impairment (HI) [ 1 - 3 ]. Deaf-mutism and HI are common in areas of iodine deficiency [ 4 ] and were reported in patients with congenital hypothyroidism (CH) prior to the implementation of thyroid neonatal screening in the 1980s [ 5