Normal values for circulating thyroid hormones (T4, T3, reverse T3), T3 Uptake and Thyrotropin ( before and after TRH ) of Austrian children

Thyroid Hormones, T3 and T4, in the Brain

Thyroid hormones (THs) are essential for fetal and post-natal nervous system development and also play an important role in the maintenance of adult brain function. Of the two major THs, T4 (3,5,3',5'-tetraiodo-l-thyronine) is classically viewed as an pro-hormone that must be converted to T3 (3,5,3'-tri-iodo-l-thyronine) via tissue-level deiodinases for biological activity. THs primarily mediat...

Characterization of an automated radioimmunoassay for T4, T3, T3 U, and FTI.

The performance characteristics of assays is reported for thyroxine (T4), triiodothyronine (T3), and T3-uptake (T3U) using the GAMMAFLOTM Automated Assay System. A comparison of calculated free thyroxine index (FTI) values is also presented. This automated radioimmunoassay (RIA) system utilizes a combination of continuous-flow methodology and chromatographic separation techniques. The T4 assay ...

Thyroid hormones T3 and T4 and their relationship with fibrinolysis variables

Unequal concentrations of free T3 and free T4 after ultrafiltration.

To the Editor: Ultrafiltration is a standard method for separating free T3 and free T4 from serum proteins and proteinbound hormone (1, 2 ). It is expected that free T3 and free T4 in aqueous solutions will accompany water as water moves across semipermeable membranes, a process that results in equal concentrations of free T3 and free T4 in the aqueous solutions on opposite sides of semipermeab...

A Study of Thyroid Hormones (t3, T4 & Tsh) in Patients of Depression

In this study, 32 unmedicated patients of unipolar depression were included and blood samples were analysed for T(3), T(4) and TSH. These were compared with age and sex matched controls. Subnormal T(3) and T(4) levels in 90.6% and 9.3% respectively and an increase of TSH levels in 18.7% of the total patients was observed in this study. The patients were classified into mild, moderate and severe...