RESUMEN
The authors studied growth hormone (GH) secretion in a group of adult controls and another group of hyperthyroid patients after stimulation with intravenous insulin-induced (0,1 IU/kg) hypoglycemia, aiming to clear out the problem of discrepancies in literature concerning GH secretion in hyperthyroidism. They concluded that in this syndrome, GH levels are significantly higher than those of controls. The GH releasing response is normal, though it could be expected to be decreased due to decreased pituitary GH contents as a result of permanent somatotrophic cell stimulation.
Asunto(s)
Hormona del Crecimiento/metabolismo , Hipertiroidismo/metabolismo , Insulina/farmacología , Hipófisis/metabolismo , Glándula Tiroides/metabolismo , Adolescente , Adulto , Femenino , Humanos , Masculino , Persona de Mediana Edad , Tasa de Secreción/efectos de los fármacos , Estimulación QuímicaRESUMEN
Synthetic beta-(pyrazolyl-1)-alanine-2-TRH, an analog of thyrotropin releasing hormone (TRH) was administered intravenously in doses of 50, 100 and 200 micrograms to four normal men in order to establish the range of responses of TSH and prolactin. Every subject showed a clear elevation in TSH and prolactin levels with all three doses. These results were compared with the increments in TSH and prolactin after the administration of the same doses of synthetic TRH. The computations of potency for absolute levels and/or increments in TSH and prolactin at 20 and 40 min showed that the analog was at least twice as active as TRH in releasing TSH and prolactin.