Distribution of glutamic acid decarboxylase, neurotensin, enkephalin, neuropeptide Y, and cholecystokinin neurons in the septo-preoptic region of male rats

Shinji Tsukahara, Korehito Yamanouchi

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Neurons in the lateral septum (LS) and preoptic area (POA) are known to play an inhibitory role in feminine sexual behavior regulation in male rats. In this study, the distribution of neurons containing glutamic acid decarboxylase (GAD) and of the peptidergic neurotransmitters neurotensin (NT), enkephalin (ENK), neuropeptide Y (NPY), and cholecystokinin (CCK), was examined immunohistochemically in the LS and POA of castrated male rats subcutaneously implanted with estrogen-containing Silastic tubes. Colchicine was injected into the lateral ventricle of the animals. The forebrain sections were immunostained for each substance. A large number of GAD-immunoreactive (ir) cells were found in the LS. Many NT-ir cells were seen in the intermediate and ventral parts of the LS at the rostral and middle levels. A considerable number of ENK-ir cells were scattered over the LS at the rostral and middle levels and were observed in the ventral part of the caudal LS. There were only a few NPY-ir cells in the LS. No CCK-ir cells were observed in the LS. In the POA, GAD-ir cells were observed in abundance. Many NT-ir cells were seen, especially in the medial preoptic nucleus. Some ENK-ir cells and a few NPY-ir cells were found in the medial POA. CCK-ir cells of the POA were restricted to the periventricular and paraventricular hypothalamic nuclei.

Original languageEnglish
Pages (from-to)67-77
Number of pages11
JournalJournal of Reproduction and Development
Volume49
Issue number1
Publication statusPublished - 2003

Keywords

  • Glutamic acid decarboxylase
  • Lateral septum
  • Male rat
  • Peptidergic neurotransmitter
  • Preoptic area

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Reproductive Medicine

Fingerprint Dive into the research topics of 'Distribution of glutamic acid decarboxylase, neurotensin, enkephalin, neuropeptide Y, and cholecystokinin neurons in the septo-preoptic region of male rats'. Together they form a unique fingerprint.

  • Cite this