Title: Hypothalamic hormones that release growth hormone stimulate hepatic 5'-monodeiodination activity in the chick embryo
Authors: Kühn, Eduard ×
Vanderpooten, Anita
Huybrechts, Leo
Decuypere, Eddy
Darras, Veerle
Sharp, Pj #
Issue Date: Aug-1988
Publisher: J endocrinology ltd
Series Title: Journal of Endocrinology vol:118 issue:2 pages:233-236
Abstract: Plasma GH, tri-iodothyronine (T3), thyroxine (T4) and liver 5'-monodeiodination (5'-D) activity were measured in 18-day-old chick embryos injected with thyrotrophin-releasing hormone (TRH) and human pancreatic growth hormone releasing factor (hpGRF). Injections of 0.1 and 1 microgram TRH and 1.5 micrograms hpGRF increased the concentration of plasma GH while injection of 15 micrograms hpGRF had no effect. Concentrations of plasma T3 were raised after injection of TRH or hpGRF. Injections of TRH but not of hpGRF raised the concentration of plasma T4. The increases in concentration of plasma T3 after injection of TRH or hpGRF were parallelled by increases in liver 5'-D activity. An injection of 0.25 micrograms T4 significantly raised the concentration of T4 in plasma but had no effect on plasma T3 or liver 5'-D activity. It is concluded that the release of chicken GH by TRH or hpGRF is responsible for the observed increase in plasma concentration of T3 and liver 5'-D activity.
ISSN: 0022-0795
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Division of Livestock-Nutrition-Quality (-)
Animal Physiology and Neurobiology Section - miscellaneous
× corresponding author
# (joint) last author

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