title: Endorphin-related peptides in rat cerebrospinal fluid.
abstract: Cerebrospinal fluid (CSF) samples were taken from rats implanted with chronic cisternal cannulae and assayed for methionine-enkephalin, beta-endorphin and corticotropin (ACTH). Immobilization stress had little apparent effect on immunoreactive levels of the peptides in the CSF. Gel chromatographic analysis of the beta-endorphin- and ACTH-immunoreactive profiles in rat CSF revealed several peaks. beta-Endorphin-immunoreactive peaks were present at the expected positions of pro-opiocortin, beta-lipotropin and beta-endorphin. ACTH-immunoreactive peaks eluted at positions corresponding to pro-opiocortin, the 20-23K ACTH biosynthetic intermediate, 14K ACTH, and 4.5K ACTH. These results suggest that rat CSF contains peptides of the pro-opiocortin family similar to those previously described in rat pituitary.
mesh_terms: D000324:Adrenocorticotropic Hormone / Q000134:cerebrospinal fluid; D000818:Animals; D004723:Endorphins / Q000134:cerebrospinal fluid*; D004744:Enkephalin, Methionine / Q000134:cerebrospinal fluid; D006801:Humans; D051381:Rats; D013315:Stress, Psychological / Q000134:cerebrospinal fluid; D001615:beta-Endorphin
chemical_list: D004723:Endorphins; D004744:Enkephalin, Methionine; D001615:beta-Endorphin; D000324:Adrenocorticotropic Hormone