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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
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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affected to some degree. Central congenital hypothyroidism Central CH results from insufficient hypothalamic and/or pituitary stimulation of an otherwise normal thyroid gland resulting in low serum TH concentrations. The majority of central
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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.
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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central congenital hypothyroidism by using 95% reference intervals for thyroxine-binding globulin . European Thyroid Journal 2021 10 222 – 229 . ( https://doi.org/10.1159/000513516 ) 4 Boelen A Zwaveling-Soonawala N Heijboer AC & van Trotsenburg
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range treated with low-dosage ATDs. The undertreatment of maternal hyperthyroidism has been reported to result in central congenital hypothyroidism [ 20 ]. Accordingly, we propose to replace the present statement in the guidelines with the following
Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, International Centre for Life, Central Parkway, Newcastle upon Tyne, UK
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Wellcome Trust-MRC Institute of Metabolic Sciences, University of Cambridge, Cambridge, UK
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Department of Endocrinology, Royal Victoria Infirmary, Newcastle-upon-Tyne, UK
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Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, International Centre for Life, Central Parkway, Newcastle upon Tyne, UK
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Wiedijk BM Endert E de Vijlder JJ Vulsma T . Disturbance of the fetal thyroid hormone state has long-term consequences for treatment of thyroidal and central congenital hypothyroidism . Journal of Clinical Endocrinology and Metabolism 2005 90
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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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congenital hypothyroidism . Journal of Clinical Endocrinology and Metabolism 2005 90 4094 – 4100 . ( https://doi.org/10.1210/jc.2005-0197 ) 3 Bagattini B Cosmo CD Montanelli L Piaggi P Ciampi M Agretti P Marco GD Vitti P Tonacchera M
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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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authors reviewed the manuscript and approved it for submission. References 1 Lauffer P Zwaveling-Soonawala N Naafs JC Boelen A & van Trotsenburg ASP . Diagnosis and management of central congenital hypothyroidism . Frontiers in
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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–1565. 29 Koulouri O, Nicholas AK, Schoenmakers E, Mokrosinski J, Lane F, Cole T, Kirk J, Farooqi IS, Chatterjee VK, Gurnell M, Schoenmakers N: A novel thyrotropin-releasing hormone receptor missense mutation (P81R) in central congenital hypothyroidism. J
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Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
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fetal thyroid hormone state has long-term consequences for treatment of thyroidal and central congenital hypothyroidism . Journal of Clinical Endocrinology and Metabolism 2005 90 4094 – 4100 . ( https://doi.org/10.1210/jc.2005-0197 ) 58 Radetti G