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Research Article Free access | 10.1172/JCI115981

Identification of a mutation in the coding sequence of the human thyroid peroxidase gene causing congenital goiter.

M J Abramowicz, H M Targovnik, V Varela, P Cochaux, L Krawiec, M A Pisarev, F V Propato, G Juvenal, H A Chester, and G Vassart

Institut de Recherche Interdisciplinaire en Biologie Humaine et Nucléaire, Free University of Brussels, Belgium.

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Institut de Recherche Interdisciplinaire en Biologie Humaine et Nucléaire, Free University of Brussels, Belgium.

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Institut de Recherche Interdisciplinaire en Biologie Humaine et Nucléaire, Free University of Brussels, Belgium.

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Institut de Recherche Interdisciplinaire en Biologie Humaine et Nucléaire, Free University of Brussels, Belgium.

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Institut de Recherche Interdisciplinaire en Biologie Humaine et Nucléaire, Free University of Brussels, Belgium.

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Institut de Recherche Interdisciplinaire en Biologie Humaine et Nucléaire, Free University of Brussels, Belgium.

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Institut de Recherche Interdisciplinaire en Biologie Humaine et Nucléaire, Free University of Brussels, Belgium.

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Institut de Recherche Interdisciplinaire en Biologie Humaine et Nucléaire, Free University of Brussels, Belgium.

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Institut de Recherche Interdisciplinaire en Biologie Humaine et Nucléaire, Free University of Brussels, Belgium.

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Institut de Recherche Interdisciplinaire en Biologie Humaine et Nucléaire, Free University of Brussels, Belgium.

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Published October 1, 1992 - More info

Published in Volume 90, Issue 4 on October 1, 1992
J Clin Invest. 1992;90(4):1200–1204. https://doi.org/10.1172/JCI115981.
© 1992 The American Society for Clinical Investigation
Published October 1, 1992 - Version history
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Abstract

Thyroid peroxidase (TPO) is the key enzyme in the synthesis of thyroid hormones, and the TPO defects are believed to be the most prevalent causes of the inborn errors of thyroid metabolism. We investigated an adopted boy with iodide organification defect, who presented with florid hypothyroidism at the age of 4 mo, poorly complied with thyroxine treatment, and developed a compressive goiter necessitating partial resection at the age of 12 yr. Biochemical studies revealed the absence of TPO activity in the resected tissue. Genomic DNA studies identified a 4 base-pair insertion in the eighth exon of the TPO gene, and showed that the patient was homozygous for this frameshift mutation. The direct genetic diagnosis of this mutation can be made by digestion of polymerase chain reaction products with NaeI restriction enzyme. This will help assessing its prevalence among the heterogenous genetic group of TPO defects.

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