The presence and distribution of gonadotropin-releasing hormone-liked factor in the central nervous system of the black tiger shrimp, Penaeus monodon

Ngernsoungnern, Piyada; Ngernsoungnern, Apichart; Kavanaugh, Scott I.; Sobhon, Prasert; Sower, Stacia A.; Sretarugsa, Prapee

doi:10.1016/j.ygcen.2007.08.012

Cited by 46 publications

(30 citation statements)

References 36 publications

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“…Similarly, in our earlier studies, lamprey (I) GnRH-ir and octGnRH-ir have not been detected in the eyestalk of P. monodon (Ngernsoungnern et al 2008c) or in M. rosenbergii (Ngernsoungnern et al 2008a). This is in contrast to the report by Amano et al (2009) who have shown GnRH-ir in the neurons of the medulla interna and immunoreactive fibers in the medulla interna, medulla externa, and lamina ganglionalis in the Kuruma prawn, Marsupenaeus japonicus.…”

Section: Discussionsupporting

confidence: 50%

“…Furthermore, no octGnRH-ir has been detected in neurons or in any neuropils in the abdominal ganglia of M. rosenbergii (Ngernsoungnern et al 2008a), although some positive fibers have been seen in P. monodon (Ngernsoungnern et al 2008c). Since the intensity of GnRH-ir is low, and since positive fibers are sparse, we suggest that GnRH in the abdominal ganglia might not be a significant factor in the regulation of ovarian maturation in the white shrimp.…”

Section: Discussionmentioning

confidence: 72%

“…Recently, our group has reported, for the first time, the existence of GnRH-like peptides in the brain of decapod crustaceans. In the black tiger shrimp, P. monodon, octGnRH-ir has been detected in medium-sized neurons in cluster 6, with some fibers of the median protocerebrum, deutocerebrum, and tritocerebrum being octGnRH-positive (Ngernsoungnern et al 2008c). In the freshwater prawn, M. rosenbergii, lGnRH-III-ir has been detected in medium-sized neurons in cluster 11 of the deutocerebrum, but no octGnRH-ir neurons and fibers have been found in the median protocerebrum, deutocerebrum, and tritocerebrum (Ngernsoungnern et al 2008a).…”

Section: Discussionmentioning

confidence: 97%

“…Octopus GnRH, lamprey GnRH-I, and lamprey GnRH-III can also induce ovarian maturation in the freshwater prawn (M. rosenbergii; Ngernsoungnern et al 2009). In addition, the existence and distribution of GnRH-like peptides in the central nervous system (CNS) and in reproductive tissues have been revealed by using immunohistochemistry in a number of invertebrates, including mollusks (A. californica; Pazos and Mathieu 1999;Tsai et al 2003; Haliotis asinina; Nuurai et al 2010b), tunicates (Ciona intestinalis; Tsutsui et al 1998;Di Fiore et al 2000), the black tiger shrimp (P. monodon; Ngernsoungnern et al 2008c;Ngernsoungnern et al 2008b), and the freshwater prawn (M. rosenbergii; Ngernsoungnern et al 2008a), and might be present in other crustaceans, including L. vannamei.…”

Section: Introductionmentioning

confidence: 99%

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Existence and distribution of gonadotropin-releasing hormone-like peptides in the central nervous system and ovary of the Pacific white shrimp, Litopenaeus vannamei

et al. 2011

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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.

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Section: Discussionsupporting

confidence: 50%

Section: Discussionmentioning

confidence: 72%

Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Existence and distribution of gonadotropin-releasing hormone-like peptides in the central nervous system and ovary of the Pacific white shrimp, Litopenaeus vannamei

et al. 2011

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“…The intensities of 5-HT-ir and DA-ir in neurons and fibers in various CNS areas and at each ovarian stage were quantified by using ImageJ computer image analysis software (http://rsb.info.nih.gov/ij/) as described previously (Ngernsoungnern et al 2008;Swayne et al 2010). In brief, digital images of the whole-mounts and sections at magnifications of 20× and 40× from five randomized sections of each area to be analyzed were obtained.…”

Section: Confocal Laser Scanning Microscopy and Image Analysismentioning

confidence: 99%

Distribution and changes of serotonin and dopamine levels in the central nervous system and ovary of the Pacific white shrimp, Litopenaeus vannamei, during ovarian maturation cycle

et al. 2011

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We investigated changes in serotonin (5-HT) and dopamine (DA) levels and in their distribution patterns in the central nervous system (CNS) and ovary during the ovarian maturation cycle in the Pacific white shrimp, Litopenaeus vannamei. The concentrations of these two neurotransmitters were determined by using high performance liquid chromatography with electrochemical detection. The 5-HT concentration exhibited a gradual increase in the brain and thoracic ganglia during early ovarian stages I, II, and III, reaching a maximum at the mature ovarian stage IV, whereas DA showed its highest concentration at ovarian stage II in the brain and thoracic ganglia and then declined to its lowest concentration at ovarian stage IV. In the ovaries, 5-HT was lowest at ovarian stage I and gradually increased to a peak at ovarian stage IV. Conversely, the concentration of DA was highest at ovarian stages I and II and lowest at ovarian stage IV. In the brain, 5-HT immunoreactivity (-ir) from stage IV and DA-ir from stage II were distributed extensively in neurons of clusters 6, 11, and 17, in fibers, and in the anterior and posterior medial protocerebral, olfactory, antenna II, and tegumentary neuropils. In the circumesophageal, subesophageal, thoracic, and abdominal ganglia, both 5-HT-ir and DA-ir were detected in neuropils and surrounding neurons and fibers. 5-HT-ir and DA-ir were more intense in the thoracic ganglia than in other parts of the CNS. In the ovary, 5-HT-ir exhibited high intensity in late oocytes, whereas DA-ir was more intense in early oocytes. Thus, opposing changes occur in the levels of these two neurotransmitters and in their specific localizations in the CNS and ovary during ovarian maturation, indicating their important involvement in female reproduction.

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Immunohistochemical detection of GnRH-like peptides in the neural ganglia and testis of Haliotis asinina

Nuurai

Primphon

Seangcharoen

et al. 2014

Microsc. Res. Tech.

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Gonadotropin releasing hormone (GnRH) is a peptide that is conserved in both vertebrate and invertebrate species. In this study, we have demonstrated the distribution pattern of two isoforms of GnRH-like peptides in the neural ganglia and testis of reproductively mature male abalone, H. asinina, by immunohistochemistry and whole mount immunofluorescence. We found octopus (oct) GnRH and tunicate-I (t) GnRH-I immunoreactivities (ir) in type 1 neurosecretory cells (NS1) and they were expressed mostly within the ventral horn of the cerebral ganglion, whereas in pleuropedal ganglia they were localized primarily in the dorsal horn. Furthermore, tGnRH-I-ir were strongly detected in fibers at the caudal part of the cerebral ganglia and both ventral and dorsal horns of the pleuropedal ganglia. In the testis, only octGnRH-ir was found primarily in the granulated cell and central capillaries within the trabeculae. These results suggest that multiple GnRH-like peptides are present in the neural ganglia which could be the principal source of their production, whereas GnRH may also be synthesized locally in the testis and act as the paracrine control of testicular maturation.

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The presence and distribution of gonadotropin-releasing hormone-liked factor in the central nervous system of the black tiger shrimp, Penaeus monodon

Cited by 46 publications

References 36 publications

Existence and distribution of gonadotropin-releasing hormone-like peptides in the central nervous system and ovary of the Pacific white shrimp, Litopenaeus vannamei

Existence and distribution of gonadotropin-releasing hormone-like peptides in the central nervous system and ovary of the Pacific white shrimp, Litopenaeus vannamei

Distribution and changes of serotonin and dopamine levels in the central nervous system and ovary of the Pacific white shrimp, Litopenaeus vannamei, during ovarian maturation cycle

Immunohistochemical detection of GnRH-like peptides in the neural ganglia and testis of Haliotis asinina

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