Active clinical trials for "Congenital Hypothyroidism"

The purpose of this study is to assess the agreement of clinical performance between the proposed NeoPlex 4 assay and NeoPlex System and the comparator devices in clinical use in newborn screening programs for detection of T4, TSH, 17-OHP and IRT.

The aim of this study was to identify mutations in the thyroglobulin gene that might be present in patients with fetal goiter and congenital goiter hypothyroidism.

The aim of this study is to evaluate longitudinal growth and final height in patients with Congenital Hypothyroidism detected by neonatal screening and factors affecting it.

Iodine is an essential component of thyroid hormone, which is necessary for many metabolic processes as well as the maturation of the CNS. Deficiencies of iodine have deleterious effects on both pregnant women and infants. The iodine status of the population after implementation of the universal salt iodization program in Zhejiang province has not been known. This study was to determine whether pregnant women show evidence of iodine deficiency, and to examine the correlation between maternal urine iodine concentration and newborn thyroid function.

Congenital hypothyroidism (CH) occurs in 1:4000 live births. Neurological disturbances like speech delay, motor delay and lower IQ were reported in children with CH. Evidence from animal experiments indicate that CH is associated with high frequency of deafness. Morphological changes of the external and internal cholera hairs were reported in mutagenic mice with CH. Anatomical changes of the internal ear and low hearing threshold were reported in mice bearing Dual oxidase 2 (Duox2) gene mutations, which is responsible of oxidation of iodide. Knockout of Pax8 gene in mice resulted in both agenesis of thyroid gland and deafness. Early L-thyroxin therapy prevented the development of deafness in those mice. The expression of thyroid receptor α (TRα) in the external and internal cholera hairs in mice indicates that the thyroid hormones have an important role in the development of the internal ear. The etiology of deafness in human is both genetic and environmental. The prevalence of deafness in live births is 1:1000 and among them 60% is genetic. Connexin 26 gene mutations are the most common cause of inherited deafness and account for about 40% of the genetic cases. In two conditions in human the coexistence of hypothyroidism and deafness were reported; Pendred syndrome and thyroid hormone resistance syndrome. The prevalence of hearing loss in human with CH was explored in only few studies and the results are contrary. The aim of the current study is to study the prevalence of hearing loss among children with CH and to compare the clinical, biochemical and genetic characteristics between subjects with hearing loss to those without hearing loss.

In France, the incidence of congenital hypothyroidism has increased significantly since the newborn screening program was introduced in 1978. The largest increase is seen in children with eutopic thyroid gland. More than one-third of children with eutopic gland have transient hypothyroidism. Clinical practice guidelines recommend to re-evaluate thyroid function in children with eutopic gland around the age of 3 years to determine whether hypothyroidism is transient or permanent. Up until today it is still difficult to determine early on whether hypothyroidism is transient or permanent in children with eutopic gland. Our aim is to identify one or more predictive factors for transient congenital hypothyroidism in children with eutopic gland or thyroid hemiagenesis.