Co-distribution of neuropeptide Y and its C-terminal flanking peptide in the brain and pituitary of the frog Rana ridibunda.
By means of the peroxidase-anti-peroxidase technique, the distribution of neuropeptide tyrosine (NPY) and its C-terminal flanking peptide (C-PON) has been studied on serial sections of the brain and pituitary of the frog Rana ridibunda. Throughout the brain, NPY and C-PON-immunoreactive perikarya exhibited a remarkable co-distribution. These two peptides were found to be co-located within the same cell bodies in various brain regions including the dorsal and ventral pallium, the dorsal and ventral infundibular nuclei and the preoptic nucleus. The distribution of NPY- and C-PON-containing fibers in the brain and pituitary was similar. Sequential double immunohistochemical staining using the indirect immunofluorescence method, showed that NPY and C-PON were actually located within the same nerve processes throughout the frog brain and in the intermediate lobe of the pituitary. These studies indicate that the deduced C-PON sequence is present within the frog precursor to NPY and is formed in vivo in the frog brain. Like NPY, C-PON is transported distally in nerve terminals and is likely released with NPY in various regions of the brain and in the intermediate lobe of the pituitary.
D000818:Animals; D001921:Brain / Q000378:metabolism*; D005455:Fluorescent Antibody Technique; D007124:Immunoenzyme Techniques; D008297:Male; D009478:Neuropeptide Y / Q000378:metabolism*; D010446:Peptide Fragments / Q000378:metabolism; D010902:Pituitary Gland / Q000378:metabolism*; D011895:Rana ridibunda
D009478:Neuropeptide Y; D010446:Peptide Fragments; C048612:neuropeptide Y C-terminal flanking peptide