Peripheral metabolism of thyroid hormones is a critical component of the impact these hormones have on intracellular function. Thyroid hormones can be metabolized in peripheral tissue by deiodination, conjugation, deamination, and decarboxylation enzyme reactions. Therefore, alterations in these metabolic pathways might significantly impact the quantity of specific thyroid hormone metabolites i...

BACKGROUND Much research has widely been conducted into thyroid hormones levels following radiotherapy for breast cancer. Consequently, in this study, we evaluated to relate the rate of thyroid hormones levels with the dose distribution among breast cancer patients. MATERIAL AND METHODS Thirty patients were treated with 4-field breast cancer radiotherapy. The dose volume histograms, the volum...

Objective: The association between thyroid hormones, thyroid autoantibodies, and thyroid nodules are still not clear. The cross-sectional study, conducted in Hangzhou, China in 2010, aimed to identify the relationship of thyroid hormones and autoantibodies with thyroid nodules. Methods: Information regarding social demography was collected by a questionnaire. Thyroid hormones (triiodothyronine,...

Ghrelin is an orexigenic peptide synthesized mainly by stomach and hypothalamus. Ghrelin decreases secretion of thyroid hormones. Testosterone is an esteroidogenic hormone that exerts stimulatory effects on Hypothalamus-Pituitary-Thyroid (HPT) axis activity. The aim of the present study was to investigate the effect of interactions between the central injection of ghrelin and testosterone on me...

In teleosts, the thyroid gland is mostly found in the subpharyngeal region. However, in several species thyroid follicles are found in, for example, heart, head kidney and kidney. Such heterotopic thyroid follicles are active, and considered to work in concert with the subpharyngeal thyroid. In Mozambique tilapia (Oreochromis mossambicus) thyroid activity is, indeed, restricted to the subpharyn...

background and objective: thyroid function problems are often present with prematurity disorders. thyroid hormones regulate growth and distinguish body organs; especially they affect central nervous system and metabolism of carbohydrates, lipids, and vitamins. thus, these hormones should be evaluated. the present study aims to determine the mean level of thyroid hormones among premature infants...

The thyroid hormones, thyroxine (T4) and triiodothyronine (T3), are essential for normal growth and development of the fetus. Their bioavailability in utero depends on development of the fetal hypothalamic-pituitary-thyroid gland axis and the abundance of thyroid hormone transporters and deiodinases that influence tissue levels of bioactive hormone. Fetal T4 and T3 concentrations are also affec...

to evaluate the concentrations of serum lipids and lipoproteins and their correlations together and withthyroid hormones in gray necked ostrich (struthio camelus), the serum levels of cholesterol, triglyceride,total lipids, very low density lipoproteins (vldl-cholesterol), low density lipoproteins (ldl-cholesterol)and high density lipoproteins (hdl-cholesterol) and their correlations with tri-i...