title: Distinct localization and target specificity of galanin-immunoreactive sympathetic preganglionic neurons of a teleost, the filefish Stephanolepis cirrhifer.
abstract: Immunoreactivity for galanin was examined in the sympathetic preganglionic neurons in the spinal cord, adrenal glands, sympathetic ganglia, and some sensory ganglia of the filefish Stephanolepis cirrhifer. Galanin-immunoreactive neurons were found only in the rostral part, but not in the caudal part of the central autonomic nucleus (a column of sympathetic preganglionic neurons of teleosts). Many galanin-immunoreactive nerve terminals were found in contact with neurons in the celiac ganglia and the cranial sympathetic ganglia on both sides of the body. Most neurons encircled by galanin-immunoreactive nerve fibers were negative for tyrosine hydroxylase. Galanin-immunoreactive nerve fibers were very sparse in the spinal sympathetic paravertebral ganglia. No galanin-immunoreactive nerve fibers were found in the adrenal glands. No sensory neurons of the trigeminal, vagal, or spinal dorsal root ganglia were positive for galanin-immunoreactivity. These results suggest that galanin-immunoreactive sympathetic preganglionic neurons have distinct segmental localization and might project specifically to a population of non-adrenergic sympathetic postganglionic neurons in the celiac and cranial sympathetic ganglia.
authors.affiliation: Department of Anatomy, Yokohama City University School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Japan. funako@med.yokohama-cu.ac.jp
authors.forename: K
authors.initials: K
authors.lastname: Funakoshi
authors.forename: T
authors.initials: T
authors.lastname: Kadota
authors.forename: Y
authors.initials: Y
authors.lastname: Atobe
authors.forename: M
authors.initials: M
authors.lastname: Nakano
authors.forename: K
authors.initials: K
authors.lastname: Hibiya
authors.forename: R C
authors.initials: RC
authors.lastname: Goris
authors.forename: R
authors.initials: R
authors.lastname: Kishida
mesh_terms: D000818:Animals; D001339:Autonomic Fibers, Preganglionic / Q000166:cytology / Q000378:metabolism*; D005399:Fishes / Q000378:metabolism*; D019004:Galanin / Q000378:metabolism*; D007150:Immunohistochemistry; D009412:Nerve Fibers / Q000378:metabolism; D009474:Neurons / Q000378:metabolism*; D013126:Spinal Nerve Roots / Q000166:cytology / Q000378:metabolism; D014018:Tissue Distribution
chemical_list: D019004:Galanin