TRH-Gly, a precursor of TRH, alters GH secretion in acromegaly.
We explored effects of a precursor of thyrotropin (TSH)-releasing hormone (TRH), TRH-Gly, on growth hormone (GH) secretion in acromegaly. Intravenous injection of TRH-Gly produced a profound increase in GH secretion in eight, decrease in two, and no response in five out of a total fifteen patients. The magnitude of GH responsiveness to TRH-Gly was significantly correlated with that induced by TRH (r = 0.824, P less than 0.01). In contrast, TRH-Gly did not induce secretion of TSH or prolactin. The present data suggest that TRH-Gly may participate in regulating GH secretion in some patients with acromegaly and that TRH-Gly-induced GH secretion may be due at least in part to TRH-associated mechanisms underlying GH secretion.
Mori
M
M
First Department of Internal Medicine, Gunma University, School of Medicine, Maebashi, Japan.
Satoh
T
T
Miyashita
K
K
Yamada
M
M
Murakami
M
M
Iriuchijima
T
T
Ohshima
K
K
Kobayashi
I
I
Kobayashi
S
S
D000172:Acromegaly / Q000378:metabolism*; D000328:Adult; D000368:Aged; D005260:Female; D013006:Growth Hormone / Q000378:metabolism*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011388:Prolactin / Q000378:metabolism; D011761:Pyrrolidonecarboxylic Acid / Q000031:analogs & derivatives; D013972:Thyrotropin / Q000378:metabolism; D013973:Thyrotropin-Releasing Hormone / Q000031:analogs & derivatives* / Q000494:pharmacology
D013973:Thyrotropin-Releasing Hormone; C040476:thyrotropin-releasing hormone, Gly; D011388:Prolactin; D013972:Thyrotropin; D013006:Growth Hormone; D011761:Pyrrolidonecarboxylic Acid