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

Nuurai, Parinyaporn, Poljaroen, Jaruwan, Tinikul, Yotsawan, Cummins, Scott, Sretarugsa, Prapee, Hanna, Peter, Wanichanon, Chaitip and Sobhon, Prasert 2010, The existence of gonadotropin-releasing hormone-like peptides in the neural ganglia and ovary of the abalone, Haliotis asinina L., Acta histochemica, vol. 112, no. 6, pp. 557-566.

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Title The existence of gonadotropin-releasing hormone-like peptides in the neural ganglia and ovary of the abalone, Haliotis asinina L.
Formatted title The existence of gonadotropin-releasing hormone-like peptides in the neural ganglia and ovary of the abalone, Haliotis asinina L.
Author(s) Nuurai, Parinyaporn
Poljaroen, Jaruwan
Tinikul, Yotsawan
Cummins, Scott
Sretarugsa, Prapee
Hanna, Peter
Wanichanon, Chaitip
Sobhon, Prasert
Journal name Acta histochemica
Volume number 112
Issue number 6
Start page 557
End page 566
Publisher Urban und Fischer Verlag
Place of publication [Berlin, Germany]
Publication date 2010-11
ISSN 0065-1281
1618-0372
Keyword(s) gonadotropin releasing hormone
gnrh
immunohisto chemistry
neural ganglia
ovary
haliotis asinina
abalone
Summary 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(I) GnRH-III and anti-tunicate(t) GnRH, but with variation of labeling intensity by each anti-GnRH type. IGnRH-III-ir was detected in numerous type1 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 type2 neurosecretory cells (NS2) in cerebral ganglion showed lGnRH-III-ir. Long nerve fibers in the neuropil of ventral regions of the cerebral and pleuropedal 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 oocytes development.
Language eng
Field of Research 060805 Animal Neurobiology
Socio Economic Objective 830103 Aquaculture Molluscs (excl. Oysters)
HERDC Research category C1 Refereed article in a scholarly journal
HERDC collection year 2010
Copyright notice ©2009, Elsevier GmbH
Persistent URL http://hdl.handle.net/10536/DRO/DU:30030940

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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