Please use this identifier to cite or link to this item:
Title: Reproductive phase‐related variations in cocaine‐ and amphetamine‐regulated transcript (CART) in the olfactory system, forebrain, and pituitary of the female catfish, Clarias batrachus (Linn.)
Authors: Barsagade, Vikas G.
Mazumdar, Minakshi
Singru, Praful S.
Thim, Lars
Clausen, Jes Thorn
Dept. of Biology
Keywords: Amphetamine-regulated transcript
Olfactory system
Female catfish
Issue Date: Apr-2010
Publisher: Wiley
Citation: Journal of Comparative Neurology, 518(13).
Abstract: The annual sexual cycle of Clarias batrachus is divisible into resting (December–January), preparatory (February–April), prespawning (May–June), spawning (July– August), and postspawning (September–November) phases. The gonosomatic indices rose steadily through the preparatory and prespawning phases, peaked in the spawning phase, and were greatly reduced during the postspawning and resting phases. A clear pattern of change was also identified in the immunocytochemical profile of the luteinizing hormone (LH) cells in the pituitary. These changes were correlated with the cocaine‐ and amphetamine‐regulated transcript (CART)‐immunoreactive system in the forebrain and pituitary. In the olfactory bulb, CART immunoreactivity in the terminal fields of the mitral cell layer, granule cells, and medial olfactory tracts gradually decreased during the resting through prespawning phases. However, it was considerably augmented during spawning (P < 0.001) and showed highest activity in the postspawning phase (P < 0.001). A different pattern was noticed in the fibers and/or neurons of the lateral part of ventral telencephalic area, the entopeduncular nucleus, and the dorsal part of the nucleus preopticus periventricularis. In these areas, intense immunoreactivity seen in preparatory phase, declined during prespawning (P < 0.01) then through spawning, and was partially augmented during the postspawning and resting phases (P < 0.05). A similar pattern was also seen in the nucleus preglomerulosus lateralis and medialis, nucleus dorsalis posterioris of thalamus, lobobulbar nucleus, and the nucleus of posterior recess. CART was transiently expressed in LH cells in the pituitary during the preparatory period. We suggest that the CART system may play a role in triggering the brain–pituitary–ovary axis at the onset of the preparatory phase. J. Comp. Neurol. 518:2503–2524, 2010.
ISSN: 0021-9967
Appears in Collections:JOURNAL ARTICLES

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.