Human serum can be depleted of insulin and growth hormone by treatment with dextran-coated charcoal or by dialysis, or both. Inclusion of such hormone-depleted serum in the standard curve of a double-antibody radioimmunoassay for immunoreactive insulin more nearly mimics the conditions under which an unknown human serum sample is assayed. Compared to the usual standard curve in which serum albu...

To a great extent, animal growth is regulated by the pituitary gland and its secretions of growth hormone (somatotropin). Implants work by increasing (via the pituitary gland) growth hormone and insulin at the cellular level, which results in increased synthesis of muscle tissue and, frequently, reduced deposition of body fat. This causes a measurable increase in growth rate and improved feed e...

Short stature is a characteristic feature of pycnodysostosis. We report defective growth hormone secretion in response to provocation and low insulin-like growth factor-I (IGF-I) concentration in five out of six patients with pycnodysostosis. Physiological replacement with growth hormone increased IGF-I concentration and improved linear growth in these children.

Short stature is a common complication of inflammatory bowel disease. Recently McCaffery, Nasr, Lawrence, and Kirsner (1970) concluded, from blood growth hormone (GH) levels obtained during insulin-hypoglycaemic provocation, that GH deficiency contributed to the retardation in growth observed in subjects with inflammatory bowel disease. Although it was not possible to eliminate the possibility ...

This study was conducted in male Sprague Dawley rats, maintained chronically on drinking water and on nicotine water at nicotine concentrations of 0.31 and 1.23 mM, to determine the effect of nicotine on body weight regulation and circulating growth hormone levels. The study was repeated to determine the effect of nicotine withdrawal on the same parameters after exposing the animals to high dos...

insulin-like growth factor-i (igf-1) is a peptide hormone which is similar in molecular structure to insulin and it is located on chromosome 5 in cattle. since the igf-1 plays an important role in the growth and development of multiple tissues, the purpose of current study was to identify the igf-1 gene polymorphism in sistani beef cattle. a total of 53 sistani beef cattle (one year) were rando...

Somatostatin (cyclic growth-hormone release-inhibiting hormone--GH-RIH) was infused into dogs with gastric fistulae. Somatostatin inhibited gastric acid response to four gastric stimulants--insulin, food, histamine, and pentagastrin. Histamine- and pentagastrin-stimulated pepsins were inhibited similarly to inhibition of acid. Somatostatin inhibited the gastrin response to insulin and food.