| Corticotropin-releasing factor
(CRF or CRH) |
protein of 41 amino acids |
acts on corticotrope to release ACTH and b-endorphin (lipotropin) |
| Gonadotropin-releasing factor
(GnRF or GnRH) |
polypeptide of 10 amino acids |
acts on gonadotrope to release LH and FSH |
| Prolactin-releasing factor
(PRF) |
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|
acts on lactotrope to release prolactin |
| Prolactin-release inhibiting
factor (PIF) |
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|
acts on lactotrope to inhibit prolactin release |
| Growth hormone-releasing factor
(GRF or GRH) |
protein of 40 and 44 amino acids |
stimulates GH secretion |
| Somatostatin |
polypeptide of 14 and 28 amino acids |
inhibits GH and TSH secretion |
| Thyrotropin-releasing factor
(TRH or TRF) |
polypeptide of 3 amino acids |
stimulates TSH |
