Cloning and characterization of the N-methyl-D-aspartate receptor subunit NR1 gene from chum salmon, Oncorhynchus keta (Walbaum, 1792)

Yu, Jeong-Nam; Ham, Seung Hyub; Lee, Seung Il; Jin, Hyung‐Joo; Ueda, Hiroshi; Jin, Dae Ho

doi:10.1186/2193-1801-3-9

Cited by 11 publications

(8 citation statements)

References 29 publications

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“…in the T showed similar expression changes to previously reported NMDA-type glutamate receptor nr1 as imprinting-related genes during seaward migration (Yu et al, 2014;Ueda et al, 2016). It was suggested that SNARE components and NMDA receptors function cooperatively in vesicle trafficking to the postsynaptic plasma membrane and facilitate synaptic plasticity in rat hippocampal post-synaptic spines (Hussain et al, 2016).…”

Section: Discussionsupporting

confidence: 80%

“…However, little is known about the functional molecules associated with neurotransmission that are important for olfactory imprinting and memory retrieval in the salmon brain. There are a few known examples, such as N-methyl-D-aspartic acid (NMDA)-type glutamate receptor NR1 subunit mRNA expression in chum salmon brain increased during seaward (Yu et al, 2014) and upriver migration (Kim et al, 2015). Generally, the NMDA receptor and glutamatergic synapses are associated with long-term potentiation of synapses (e.g., Siegelbaum and Kandel, 1991), thus increasing nr1 expression levels in the juvenile brain, which suggested an association with long-term potentiation and subsequent imprinting (Kim et al, 2015;Ueda et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Molecular characterization and gene expression of synaptosome-associated protein-25 (SNAP-25) in the brain during both seaward and homeward migrations of chum salmon Oncorhynchus keta

Abe

Minowa

Kudo

2018

Comparative Biochemistry and Physiology Part A: Molecular &

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It is generally accepted that information about some of the odorants in the natal streams of anadromous Pacific salmon (Genus Oncorhynchus) is imprinted during their seaward migration, and that anadromous Pacific salmon use olfaction to identify their natal streams during the homeward migration. However, little is known about the molecular mechanisms of the various pre-synaptic functions that are important for olfactory imprinting and memory retrieval in the salmon brain. Synaptosome-associated protein-25 (SNAP-25) mediates pre-synaptic vesicle exocytosis and regulates synaptic transmission and neuronal plasticity. Despite the importance of synaptic plasticity for memorization, the expression of SNAP-25 in the salmon brain is not well understood. In this study, snap25 expression was detected in chum salmon (O. keta) brains using molecular biological techniques. Two cDNAs encoding salmon SNAP-25 were isolated and sequenced (SNAP-25a and SNAP-25b). These cDNAs encoded proteins with 204 amino acid residues, which showed marked homology with each other (97%). The protein and nucleotide sequences demonstrated a high level of homology between salmon SNAP-25s and those of other teleost species. By quantitative PCR, the expression of snap25a and snap25b was detected in all regions of the salmon brain, especially in the telencephalon. The expression levels of snap25a in the olfactory blub were higher during seaward migration than in upriver and post-upriver migrations, reflecting synaptogenesis in the olfactory nervous system, and snap25b in the telencephalon was increased during upriver period. Our results indicated that snap25s gene is involved in synaptic plasticity for olfactory imprinting and/or olfactory memory retrieval in Pacific salmon.

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Section: Discussionsupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Molecular characterization and gene expression of synaptosome-associated protein-25 (SNAP-25) in the brain during both seaward and homeward migrations of chum salmon Oncorhynchus keta

Abe

Minowa

Kudo

2018

Comparative Biochemistry and Physiology Part A: Molecular &

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“…Furthermore, the NMDAR is composed of two subunits: the essential NR1 subunit and the differentially expressed NR2A‐D subunit (Shipton & Paulsen, ). The nr1 gene of O. keta has been cloned and characterised (Yu et al ., ) and the effects of changes in salinity on nr1 expression have been reported (Kim et al ., ). However, there have been no reports addressing how nr1 might be involved in olfactory memory formation and retrieval in Oncorhynchus spp.…”

Section: Neuroendocrinological Studies On Hormones and Memoriesmentioning

confidence: 90%

“…Furthermore, the NMDAR is composed of two subunits: the essential NR1 subunit and the differentially expressed NR2A-D subunit (Shipton & Paulsen, 2013). The nr1 gene of O. keta has been cloned and characterised (Yu et al, 2014) and the effects of changes in salinity on nr1 expression have been reported (Kim et al, 2015).…”

Section: Neuroendocrinological Studies On Hormones and Memoriesmentioning

confidence: 99%

Sensory mechanisms of natal stream imprinting and homing in Oncorhynchus spp.

Ueda

2018

Journal of Fish Biology

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Juvenile Oncorhynchus spp. can memorise their natal stream during downstream migration; juveniles migrate to feed during their growth phase and then they migrate long distances from their feeding habitat to their natal stream to reproduce as adults. Two different sensory mechanisms, olfaction and navigation, are involved in the imprinting and homing processes during short-distance migration within the natal stream and long-distance migration in open water, respectively. Here, olfactory functions are reviewed from both neurophysiological studies on the olfactory discrimination ability of natal stream odours and neuroendocrinological studies on the hormonal controlling mechanisms of olfactory memory formation and retrieval in the brain. These studies revealed that the long-term stability of dissolved free amino-acid composition in the natal stream is crucial for olfactory imprinting and homing. Additionally, the brain-pituitary-thyroid and brain-pituitary-gonadal hormones play important roles in olfactory memory formation and retrieval, respectively. Navigation functions were reviewed from physiological biotelemetry techniques with sensory interference experiments during the homing migration of anadromous and lacustrine Oncorhynchus spp. The experiments demonstrated that Oncorhynchus spp. used compass navigation mechanisms in the open water. These findings are discussed in relation to the sensory mechanisms involved in natal stream imprinting and homing in Oncorhynchus spp.

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“…NMDAR is comprised of two subunits: the essential NR1 subunit and the differentially expressed NR2A-D subunit (Shipton and Paulsen 2013). The NR1 gene of chum salmon has recently been cloned and characterized (Yu et al 2014), and the effects of changing salinity on NR1 gene expression have been reported (Kim et al 2015). However, there have been no reports addressing how NR1 might be involved in olfactory memory formation and retrieval in salmon.…”

Section: Endocrinology Studies On Imprinting and Homing Migrationmentioning

confidence: 99%