Genetic Analysis in Children with Transient Thyroid Dysfunction or Subclinical Hypothyroidism
Detected on Neonatal Screening |
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| Authors: | Mari Satoh Keiko Aso Sayaka Ogikubo Atsuko Ogasawara Tsutomu Saji |
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| Institution: | 1.Department of Pediatrics, Toho University Omori Medical Center, Tokyo, Japan;2.Department of Endocrinology, Ibaraki Children’s Hospital, Ibaraki, Japan;3.Okinaka Memorial Institute for Medical Research, Tokyo, Japan |
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| Abstract: | About 30% of children with elevated TSH levels during neonatal screening have a transient form of disorder.
On the other hand, it has been reported that subclinical hypothyroidism persists in late childhood in about
30% of children found to be false-positive during neonatal screening. The aim of this study was to determine
whether transient thyroid dysfunction and subclinical hypothyroidism detected during neonatal screening are
influenced by genetic background. The TSH receptor (TSHR), thyroid peroxidase (TPO) and dual oxidase 2 (DUOX2)
genes, for which it has been reported that heterozygous defects cause neonatal transient thyroid dysfunction,
were analyzed. Nine children with transient thyroid dysfunction or subclinical hypothyroidism detected during
neonatal screening were studied. One child was heterozygous for a TSHR gene mutation (R450H), and another
child was heterozygous for a TPO gene mutation (P883S). No children with mutation of the DUOX2 gene were
identified. Genetic background may contribute to development of transient thyroid dysfunction and subclinical
hypothyroidism detected during neonatal screening. |
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| Keywords: | neonatal screening transient hyperthyrotropinemia subclinical hypothyroidism TSH receptor thyroid peroxidase |
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