title: NPY- and C-PON-immunoreactive substances in the central nervous system of Helix pomatia.
abstract: The distribution of neuropeptide-tyrosin (NPY)- and C-flanking peptide of neuropeptide-tyrosine (C-PON)-immunoreactivities in the central nervous system of the pulmonate gastropod, Helix pomatia, was investigated. NPY- and C-PON-like substances were localized in neuronal somata and neuntes, but were not co-localized within the same cells. NPY-immunoreactive substances were also found in endocrine/paracrine like cells located in the epineurium. C-PON and NPY, both reduced serotonin activated isometric contractions of Helix aorta, suggesting that they may act as modulators in the control of the vascular system.
authors.affiliation: University of Salzburg, Institute of Zoology, Department of Animal Physiology, Hellbrunnerstr. 34, 5020 Salzburg, Austria.
authors.forename: H H
authors.initials: HH
authors.lastname: Kerschbaum
authors.forename: U
authors.initials: U
authors.lastname: Sonnleitner-Wittauer
authors.forename: G W
authors.initials: GW
authors.lastname: Hacker
authors.forename: A
authors.initials: A
authors.lastname: Hermann