Title : TSH secretory responses to prolonged infusion of TRH in hypothyroid rats.

Pub. Date : 1993 Jun

PMID : 7920881






6 Functional Relationships(s)
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1 TSH secretory responses to prolonged infusion of TRH in hypothyroid rats. Thyrotropin thyrotropin releasing hormone Rattus norvegicus
2 Infusion of a constant concentration of TRH induced a peak in the plasma TSH concentration within 5-15 min which declined to the baseline within 1 h. The refractory period lasted 20-40 min after stopping the continuous TRH infusion. Thyrotropin thyrotropin releasing hormone Rattus norvegicus
3 A second burst of TSH secretion was induced by increasing the TRH concentration during the refractory period while TRH was being continuously infused. Thyrotropin thyrotropin releasing hormone Rattus norvegicus
4 A second burst of TSH secretion was induced by increasing the TRH concentration during the refractory period while TRH was being continuously infused. Thyrotropin thyrotropin releasing hormone Rattus norvegicus
5 These data indicate that in hypothyroid rats TSH secretion rapidly becomes refractory to continuous exposure to the same concentration of TRH but is stimulated by a higher TRH concentration. Thyrotropin thyrotropin releasing hormone Rattus norvegicus
6 These data indicate that in hypothyroid rats TSH secretion rapidly becomes refractory to continuous exposure to the same concentration of TRH but is stimulated by a higher TRH concentration. Thyrotropin thyrotropin releasing hormone Rattus norvegicus