title: Coexistence of neuropeptides in hydra.
abstract: Using a technique for simultaneous visualisation of two antigens in one section, oxytocin-like immunoreactivity has been found to coexist with bombesin-like immunoreactivity in neurons of the basal disk, gastric region and tentacles of hydra. Neurons with oxytocin-like immunoreactivity in peduncle and hypostome, on the other hand, have little or no bombesin-like material. Oxytocin-like immunoreactivity never coexists with FMRFamide-immunoreactivity. The neurons with oxytocin- and FMRFamide-like immunoreactivity, however, are often found to be closely intermingled. The results show that coexistence, as well as non-coexistence, of neuropeptides is a phylogenetically old principle.
mesh_terms: D000818:Animals; D001839:Bombesin / Q000378:metabolism*; D019835:FMRFamide; D005455:Fluorescent Antibody Technique; D006829:Hydra / Q000166:cytology / Q000378:metabolism*; D009474:Neurons / Q000378:metabolism*; D009842:Oligopeptides / Q000378:metabolism*; D010121:Oxytocin / Q000378:metabolism*; D010455:Peptides / Q000378:metabolism*
chemical_list: D009842:Oligopeptides; D010455:Peptides; D010121:Oxytocin; D019835:FMRFamide; D001839:Bombesin