Photostimulation affects gonadotropin-releasing hormone immunoreactivity and activates a distinct neuron population in the hypothalamus of the mallard

Péter Péczely, K. Kovács

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

To reveal central mechanisms that transduce photic stimuli to sexually related neuroendocrine changes, Fra-2-ir, an inducible immediate-early gene marker of neuronal activation has been consecutively localized with that of GnRH-I in the brain of mallards that were triggered by artificial light at the photosensitive phase of the reproductive cycle. Strong neuronal activation was found in the POM and PVN in response to 1x or 4x 20 h light exposure that was accompanied with an increase of GnRH-ir in the hypothalamus and a dramatic depletion of GnRH-ir from terminals in the median eminence. The Fra-2 and GnRH-ir profiles, however, were not co-localized in any region at any phase of photostimulation. These results demonstrate profound changes of GnRH-ir in the hypothalamus and reveal a distinct, photoresponsive cell population in the anterior hypothalamic area of the mallard. (C) 2000 Elsevier Science Ireland Ltd.

Original languageEnglish
Pages (from-to)205-208
Number of pages4
JournalNeuroscience Letters
Volume290
Issue number3
DOIs
Publication statusPublished - Sep 1 2000

Fingerprint

Gonadotropin-Releasing Hormone
Hypothalamus
Neurons
Population
Anterior Hypothalamic Nucleus
Light
Median Eminence
Immediate-Early Genes
Brain

Keywords

  • Fos-related antigen
  • GnRH
  • Immediate-early gene
  • Mallard
  • Photostimulation
  • Preoptic area

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

@article{3173e9680da54d579a7df05f44997d9d,
title = "Photostimulation affects gonadotropin-releasing hormone immunoreactivity and activates a distinct neuron population in the hypothalamus of the mallard",
abstract = "To reveal central mechanisms that transduce photic stimuli to sexually related neuroendocrine changes, Fra-2-ir, an inducible immediate-early gene marker of neuronal activation has been consecutively localized with that of GnRH-I in the brain of mallards that were triggered by artificial light at the photosensitive phase of the reproductive cycle. Strong neuronal activation was found in the POM and PVN in response to 1x or 4x 20 h light exposure that was accompanied with an increase of GnRH-ir in the hypothalamus and a dramatic depletion of GnRH-ir from terminals in the median eminence. The Fra-2 and GnRH-ir profiles, however, were not co-localized in any region at any phase of photostimulation. These results demonstrate profound changes of GnRH-ir in the hypothalamus and reveal a distinct, photoresponsive cell population in the anterior hypothalamic area of the mallard. (C) 2000 Elsevier Science Ireland Ltd.",
keywords = "Fos-related antigen, GnRH, Immediate-early gene, Mallard, Photostimulation, Preoptic area",
author = "P{\'e}ter P{\'e}czely and K. Kov{\'a}cs",
year = "2000",
month = "9",
day = "1",
doi = "10.1016/S0304-3940(00)01360-4",
language = "English",
volume = "290",
pages = "205--208",
journal = "Neuroscience Letters",
issn = "0304-3940",
publisher = "Elsevier Ireland Ltd",
number = "3",

}

TY - JOUR

T1 - Photostimulation affects gonadotropin-releasing hormone immunoreactivity and activates a distinct neuron population in the hypothalamus of the mallard

AU - Péczely, Péter

AU - Kovács, K.

PY - 2000/9/1

Y1 - 2000/9/1

N2 - To reveal central mechanisms that transduce photic stimuli to sexually related neuroendocrine changes, Fra-2-ir, an inducible immediate-early gene marker of neuronal activation has been consecutively localized with that of GnRH-I in the brain of mallards that were triggered by artificial light at the photosensitive phase of the reproductive cycle. Strong neuronal activation was found in the POM and PVN in response to 1x or 4x 20 h light exposure that was accompanied with an increase of GnRH-ir in the hypothalamus and a dramatic depletion of GnRH-ir from terminals in the median eminence. The Fra-2 and GnRH-ir profiles, however, were not co-localized in any region at any phase of photostimulation. These results demonstrate profound changes of GnRH-ir in the hypothalamus and reveal a distinct, photoresponsive cell population in the anterior hypothalamic area of the mallard. (C) 2000 Elsevier Science Ireland Ltd.

AB - To reveal central mechanisms that transduce photic stimuli to sexually related neuroendocrine changes, Fra-2-ir, an inducible immediate-early gene marker of neuronal activation has been consecutively localized with that of GnRH-I in the brain of mallards that were triggered by artificial light at the photosensitive phase of the reproductive cycle. Strong neuronal activation was found in the POM and PVN in response to 1x or 4x 20 h light exposure that was accompanied with an increase of GnRH-ir in the hypothalamus and a dramatic depletion of GnRH-ir from terminals in the median eminence. The Fra-2 and GnRH-ir profiles, however, were not co-localized in any region at any phase of photostimulation. These results demonstrate profound changes of GnRH-ir in the hypothalamus and reveal a distinct, photoresponsive cell population in the anterior hypothalamic area of the mallard. (C) 2000 Elsevier Science Ireland Ltd.

KW - Fos-related antigen

KW - GnRH

KW - Immediate-early gene

KW - Mallard

KW - Photostimulation

KW - Preoptic area

UR - http://www.scopus.com/inward/record.url?scp=0343878839&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0343878839&partnerID=8YFLogxK

U2 - 10.1016/S0304-3940(00)01360-4

DO - 10.1016/S0304-3940(00)01360-4

M3 - Article

VL - 290

SP - 205

EP - 208

JO - Neuroscience Letters

JF - Neuroscience Letters

SN - 0304-3940

IS - 3

ER -