title: Dose-response of prolactin and thyrotropin to N3im-methyl-thyrotropin releasing hormone in euthyroid men.
abstract: The synthetic N3im-methyl analogue of thyrotropin releasing hormone (methyl-TRH) was administered intravenously to 15 euthyroid men, ages 36-62, in graded doses from 6.25 mug to 500 mug in order to establish the range of response of prolactin (PRL), TSH, T3 and T4 to various doses of methyl-TRH. There was a dose-related rise in serum TSH, PRL, T3, and T4 which gave a nearly linear relationship when the integrated area of response was used as an index of response to the various doses of methyl-TRH. All 15 men had a clear elevation in TSH, PRL, T3 and T4 following the lowest dose of methyl-TRH TESTED (6.25 mug). There was considerable variability in the response to methyl-TRH among the individuals. One hundred mug of methyl-TRH gave a maximum TSH response; a 25 mug dose elicited a maximum PRL response.
mesh_terms: D000328:Adult; D004305:Dose-Response Relationship, Drug; D006801:Humans; D007700:Kinetics; D008297:Male; D008875:Middle Aged; D011388:Prolactin / Q000097:blood*; D013961:Thyroid Gland / Q000187:drug effects / Q000502:physiology*; D013972:Thyrotropin / Q000031:analogs & derivatives* / Q000097:blood*; D013974:Thyroxine / Q000097:blood; D014284:Triiodothyronine / Q000097:blood
chemical_list: D014284:Triiodothyronine; D011388:Prolactin; D013972:Thyrotropin; D013974:Thyroxine