Innervation of thyrotropin-releasing hormone-containing neurons in the bullfrog pars intermedia.
We studied immunocytochemical localization of thyrotropin-releasing (TRH) in the bullfrog pats intermedia. Many TRH-like immunoreactive terminals containing immunoreactive granular vesicles 80-150 nm in diameter (116 nm mean diameter) were found in the pars intermedia. Some TRH-like immunoreactive terminals were in synaptic contact with the intermedia cells. These findings support the hypothesis that TRH directly activates the intermedia cells via synapses to secrete alpha-melanocyte-stimulating hormone.
D000818:Animals; D005260:Female; D007150:Immunohistochemistry; D008297:Male; D009474:Neurons / Q000648:ultrastructure*; D010903:Pituitary Gland, Anterior / Q000648:ultrastructure*; D011892:Rana catesbeiana; D013973:Thyrotropin-Releasing Hormone / Q000032:analysis* / Q000276:immunology
D013973:Thyrotropin-Releasing Hormone