Endocrine Abstracts

It has been claimed that an increased level of thyroid autoantibodies in serum is associated with a higher risk for coronary heart disease (CHD). We explored whether this risk was mediated by subclinical hypothyroidism and hypercholesterolemia. We evaluated 945 consecutive hospital patients (mean age 59 years) according to strict electrocardiographic and clinical criteria for the presence of CHD. Serum cholesterol, LDL and HDL cholesterol and sensitive TSH were measured in all...

The effects of thyroid hormone deprivation and restitution on growth rate and pituitary and plasma GH levels have been studied in control and streptozotocin (STZ) – diabetic rats. GH was measured by a specific RIA using the NIAMOD rat-GH kit. Male Wistar rats which had been surgically thyroidectomized for 30 days and which had been stopped growing were injected i.p. with either saline or STZ (4 mg/100 g b.wt). Eight days after saline or STZ, groups of thyroidectomized con...

The purpose of this work was to investigate the effect of thyrotropin (TSH) on the thyroglobulin and on the polypeptides distribution in primary cultures of human thyroid cells.Thyroid cells isolated from cold nodules (follicular adenoma) were cultured for 5 to 8 days in the presence of 0.05 to 25 mU/ml of TSH (TSH cells) or in the absence of the hormone (control cells). After homogenization of the cells, thyroglobulin radioimmunoassay was performed. The...

Although the physico-chemical properties of colloid are not usually considered among the factors regulating thyroid function, it is conceivable that decreasing the viscosity of the intrafollicular colloid may facilitate diffusion of thyroglobulin (Tg) molecules within the lumina. The resulting increase in the number of contacts between Tg molecules and peroxidase at the apical membrane may promote the coupling reaction. Rats on a hormonal diet were given 0.5 μg T4</s...