Description : Thyrotropin-releasing hormone (TRH; 613879), a small neuropeptide, is widely distributed
throughout the central and peripheral nervous system as well as in extraneural tissues.
The peptide is synthesized in the hypothalamus and transported by the portal vascular
system to the anterior pituitary where it acts on thyrotropic and lactotropic cells
to promote secretion of TSH and prolactin, respectively. Thyrotropin-releasing hormone
receptor is a G protein-coupled receptor that activates the inositol phospholipid-calcium-protein
kinase C transduction pathway upon the binding of TRH. The TRHR gene is expressed
in the thyrotrope cells of the anterior pituitary.;