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. 1992 Oct;90(4):1200–1204. doi: 10.1172/JCI115981

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

M J Abramowicz 1, H M Targovnik 1, V Varela 1, P Cochaux 1, L Krawiec 1, M A Pisarev 1, F V Propato 1, G Juvenal 1, H A Chester 1, G Vassart 1
PMCID: PMC443160  PMID: 1401057

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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Selected References

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