The existence of gonadotropin-releasing hormone-like peptides in the neural ganglia and ovary of the abalone, Haliotis asinina L.

P Nuurai; J Poljaroen; Y Tinikul; Scott F Cummins; P Sretarugsa; P J Hanna; C Wanichanon; P Sobhon

doi:10.1016/j.acthis.2009.06.002

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The existence of gonadotropin-releasing hormone-like peptides in the neural ganglia and ovary of the abalone, Haliotis asinina L.

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The existence of gonadotropin-releasing hormone-like peptides in the neural ganglia and ovary of the abalone, Haliotis asinina L.

P Nuurai, J Poljaroen, Y Tinikul, Scott F Cummins, P Sretarugsa, P J Hanna, C Wanichanon and P Sobhon

Acta Histochemica, Vol.112(6), pp.557-566

2010

DOI: https://doi.org/10.1016/j.acthis.2009.06.002

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Abstract

gonadotropin-releasing hormone

Gnrh

immunohistochemistry

neural ganglia

ovary

haliotis asinina

abalone

Gonadotropin-releasing hormone (GnRH) is a neuropeptide that is conserved in both vertebrate and invertebrate species. In this study, we have demonstrated the presence and distribution of two isoforms of GnRH-like peptides in neural ganglia and ovary of reproductively mature female abalone, Haliotis asinina, using immunohistochemistry. We found significant immunoreactivities (ir) of anti-lamprey(l) GnRH-III and anti-tunicate(t) GnRH, but with variation of labeling intensity by each anti-GnRH type. lGnRH-III-ir was detected in numerous type 1 neurosecretory cells (NS1) throughout the cerebral and pleuropedal ganglia, whereas tGnRH-I-ir was detected in only a few NS1 cells in the dorsal region of cerebral and pleuropedal ganglia. In addition, a small number of type 2 neurosecretory cells (NS2) in cerebral ganglion showed lGnRH-III-ir. Long nerve fibers in the neuropil of ventral regions of the cerebral and pluropedal ganglia showed strong tGnRH-I-ir. In the ovary, lGnRH-III-ir was found primarily in oogonia and stage I oocytes, whereas tGnRH-ir was observed in stage I oocytes and some stage II oocytes. These results indicate that GnRH produced in neural ganglia may act in neural signaling. Alternatively, GnRH may also be synthesized locally in the ovary where it could induce oocyte development.

Details

Title: The existence of gonadotropin-releasing hormone-like peptides in the neural ganglia and ovary of the abalone, Haliotis asinina L.
Authors: P Nuurai (Author) - Mahidol University, Thailand
J Poljaroen (Author) - Mahidol University, Thailand
Y Tinikul (Author) - Mahidol University, Thailand
Scott F Cummins (Author) - University of Queensland
P Sretarugsa (Author) - Mahidol University, Thailand
P J Hanna (Author) - Deakin University, Thailand
C Wanichanon (Author) - Mahidol University, Thailand
P Sobhon (Author) - Mahidol University, Thailand
Publication details: Acta Histochemica, Vol.112(6), pp.557-566
Publisher: Urban & Fischer Verlag
Date published: 2010
DOI: 10.1016/j.acthis.2009.06.002
ISSN: 0065-1281
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering; Centre for Bioinnovation
Language: English
Record Identifier: 99449677902621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Cell Biology

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