OBJECTIVE The aim of this study was to determine if pregnancy outcome for women undergoing in vitro fertilization is correlated with pre-conception thyroid-stimulating hormone level. STUDY DESIGN We performed a retrospective cohort study of in vitro fertilization cycles in our private practice with an initial positive serum human chorionic gonadotropin level and thyroid-stimulating hormone le...

Amphibian metamorphosis affords a useful experimental system in which to study thyroid hormone regulation of gene expression during postembryonic vertebrate development. In order to isolate gene-specific cDNA probes which correspond to thyroid hormone-responsive mRNAs, we employed differential colony hybridization of a cDNA library constructed from poly(A)+ RNA of thyroxine-treated premetamorph...

Despite clinical evidence that thyroid hormone is essential for brain development before birth, effects of thyroid hormone on the fetal brain have been largely unexplored. One mechanism of thyroid hormone action is regulation of gene expression, because thyroid hormone receptors (TRs) are ligand-activated transcription factors. We used differential display to identify genes affected by acute T(...

Thyroid-stimulating hormone alpha and beta subunit genes are negatively regulated by thyroid hormone at the transcriptional level. Transient gene expression studies were used to demonstrate that the erbA beta form of the thyroid hormone receptor mediates negative regulation of the alpha-subunit promoter in a hormone-dependent manner. In JEG-3 choriocarcinoma cells, which are deficient in thyroi...

Thyroid hormone is essential for normal development, differentiation, and metabolic balance. Thyroid hormone action is mediated by multiple thyroid hormone receptor isoforms derived from two distinct genes. The thyroid hormone receptors belong to a nuclear receptor superfamily that also includes receptors for other small lipophilic hormones. Thyroid hormone receptors function by binding to spec...

Thyroid hormone exhibits profound effects on neural progenitor turnover, survival, maturation, and differentiation during perinatal development. Studies over the past decade have revealed that thyroid hormone continues to retain an important influence on progenitors within the neurogenic niches of the adult mammalian brain. The focus of the current review is to critically examine and summarize ...

Thyroid hormone, acting through thyroid hormone receptors is a key regulator of metabolic homeostasis. Repression of transcription is critical component of thyroid hormone signaling and is mediated through the association of corepressor proteins with thyroid hormone receptors. In this review we will discuss recent results elucidating multiple roles for corepressors in mediating thyroid hormones...

The thyroid hormone is responsible for regulating the metabolic rate of every cell in the body. The action of thyroid hormone is very important in many developmental processes such as body growth and central nervous system maturation. When the thyroid gland is malfunctioning, it can affect anysystem of the body including auditory system [1]. Thyroid disorder is a general term representing sever...

there are numerous, often contradictory reports on the effect of growth hormone (gh) therapy on thyroid function. these reports prompted us to evaluate the impact of gh therapy on thyroid function in previously euthyroid children with gh deficiency. twenty five clinically and biochemically euthyroid children with gh deficiency were studied. a thyroid profile (t4, free t4, t3 and tsh) was perfor...