Pituitary stimulation by combined administration of four hypothalamic releasing hormones in normal men and patients.
Ten normal young men (22-28 yr of age), within 10% of their ideal body weight, were given the four releasing hormones (TRH, 200 micrograms; GnRH, 100 micrograms; ovine corticotropin-releasing hormone, 50 micrograms; GH-releasing hormone, 80 micrograms) iv on separate days and then in combination on the same day. Plasma TSH, PRL, FSH, LH, cortisol, ACTH, and GH were measured by RIA in samples collected from 20 min before to 120 min after injection. There were no significant differences in responses to the separate and combined tests for FSH, LH, cortisol, ACTH, and GH. The plasma TSH (0.001 less than P less than 0.01) and PRL (P less than 0.001) responses were significantly higher after the combined test. The tolerance was identical to that of TRH alone. In eight patients studied after pituitary surgery, combined administration provided results comparable to those obtained after separate administration of TRH, GnRH, and insulin.
D000236:Adenoma / Q000097:blood / Q000601:surgery; D000324:Adrenocorticotropic Hormone / Q000097:blood; D000328:Adult; D000368:Aged; D003346:Corticotropin-Releasing Hormone / Q000494:pharmacology; D004359:Drug Therapy, Combination; D005260:Female; D005640:Follicle Stimulating Hormone / Q000097:blood; D007987:Gonadotropin-Releasing Hormone / Q000494:pharmacology; D013006:Growth Hormone / Q000097:blood; D013007:Growth Hormone-Releasing Hormone / Q000494:pharmacology; D006801:Humans; D006854:Hydrocortisone / Q000097:blood; D007328:Insulin / Q000494:pharmacology; D007986:Luteinizing Hormone / Q000097:blood; D008297:Male; D008875:Middle Aged; D010902:Pituitary Gland / Q000187:drug effects*; D010906:Pituitary Hormone-Releasing Hormones / Q000008:administration & dosage / Q000009:adverse effects / Q000494:pharmacology*; D010911:Pituitary Neoplasms / Q000097:blood* / Q000601:surgery; D011388:Prolactin / Q000097:blood; D013972:Thyrotropin / Q000097:blood; D013973:Thyrotropin-Releasing Hormone / Q000494:pharmacology
D007328:Insulin; D010906:Pituitary Hormone-Releasing Hormones; D007987:Gonadotropin-Releasing Hormone; D013973:Thyrotropin-Releasing Hormone; D000324:Adrenocorticotropic Hormone; D011388:Prolactin; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone; D013972:Thyrotropin; D013006:Growth Hormone; D003346:Corticotropin-Releasing Hormone; D013007:Growth Hormone-Releasing Hormone; D006854:Hydrocortisone