Publication: Existence and distribution of gonadotropin-releasing hormone-like peptides in the central nervous system and ovary of the Pacific white shrimp, Litopenaeus vannamei
Issued Date
2011-03-01
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ISSN
0302766X
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2-s2.0-79953827885
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Mahidol University
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SCOPUS
Bibliographic Citation
Cell and Tissue Research. Vol.343, No.3 (2011), 579-593
Suggested Citation
Yotsawan Tinikul, Jaruwan Poljaroen, Parinyaporn Nuurai, Panat Anuracpreeda, Charoonroj Chotwiwatthanakun, Ittipon Phoungpetchara, Napamanee Kornthong, Tanes Poomtong, Peter J. Hanna, Prasert Sobhon Existence and distribution of gonadotropin-releasing hormone-like peptides in the central nervous system and ovary of the Pacific white shrimp, Litopenaeus vannamei. Cell and Tissue Research. Vol.343, No.3 (2011), 579-593. doi:10.1007/s00441-010-1112-3 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/11584
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Title
Existence and distribution of gonadotropin-releasing hormone-like peptides in the central nervous system and ovary of the Pacific white shrimp, Litopenaeus vannamei
Abstract
We used antibodies against octopus gonadotropin-releasing hormone (octGnRH) and tunicate GnRH (tGnRH-I) in order to investigate the existence and distribution of GnRH-like peptides in the central nervous system (CNS) and in the ovary during various stages of the ovarian cycle of the white shrimp, Litopenaeus vannamei. OctGnRH-immunoreactive and tGnRH-I-immunoreactive neurons and fibers were present in several regions of the supraesophageal ganglion (brain), subesophageal ganglion (SEG), thoracic ganglia, and abdominal ganglia. In the brain, both octGnRH immunoreactivity (ir) and tGnRH-I-ir were detected in neurons of clusters 6, 11, 17, and associated fibers, and the anterior medial protocerebral, posterior medial protocerebral, olfactory, and tegumentary neuropils. In the SEG and thoracic ganglia, octGnRH-immunoreactive and tGnRH-I-immunoreactive neurons and fibers were present in dorsolateral and ventromedial cell clusters and in surrounding fibers. Only immunoreactive fibers were detected in the abdominal ganglia. In the ovary, both octGnRH and tGnRH-I were detected at medium intensity in the cytoplasm of early step oocytes (Oc2) and, at high intensity, in Oc3. Furthermore, octGnRH-ir and tGnRH-I-ir were intense in follicular cells surrounding Oc2 and Oc3. The presence of GnRH-ir in the CNS and ovary indicates that GnRH-like peptides occur in the white shrimp, and that GnRHs are involved in the reproductive process, especially ovarian maturation and the differentiation of oocytes, as reported in other species. © 2011 Springer-Verlag.