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Related Experiment Videos

Developmental changes in NMDA receptor expression in the platyfish brain

K M Flynn1, M P Schreibman, L Magliulo-Cepriano

  • 1The Graduate School and University Center of the City University of New York, NY, USA.

Brain Research
|February 12, 1998
PubMed
Summary

Researchers studied the N-methyl-D-aspartate (NMDA) receptor in fish brains. NMDA receptor presence in the nucleus olfactoretinalis increased with animal maturity, suggesting a link to reproductive development.

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Preface.

Fish physiology and biochemistry·2013
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Genetic influences on reproductive system development and function: A review.

Fish physiology and biochemistry·2013

Area of Science:

  • Neuroscience
  • Fish Biology
  • Endocrinology

Background:

  • The N-methyl-D-aspartate (NMDA) receptor is a key player in synaptic plasticity and neuronal function.
  • Gonadotropin-releasing hormone (GnRH) systems regulate reproductive processes in vertebrates.
  • Understanding receptor distribution in non-mammalian vertebrates provides comparative insights into neuroendocrine regulation.

Purpose of the Study:

  • To investigate the distribution of the NMDA receptor R1 subunit (NMDAR1) in the brain of a freshwater teleost.
  • To determine the localization of NMDAR1 within specific brain nuclei, particularly those involved in neuroendocrine function.
  • To examine potential correlations between NMDAR1 expression and the developmental or reproductive stage of the animals.

Main Methods:

Keywords:
NASA Discipline Developmental BiologyNon-NASA Center

Related Experiment Videos

  • Immunohistochemistry was employed using an antibody specific to the NMDAR1 subunit.
  • Brain tissue from freshwater teleosts at various developmental stages (immature, pubescent, mature, senescent) was analyzed.
  • NMDAR1-positive cells were quantified in specific brain regions, with a focus on the nucleus olfactoretinalis (NOR).

    • Main Results:

    • The primary localization of NMDAR1 was identified in the nucleus olfactoretinalis (NOR).
    • The NOR is a significant brain nucleus containing gonadotropin-releasing hormone (GnRH).
    • NMDAR1-expressing cell counts in the NOR were significantly higher in pubescent and mature animals compared to immature and senescent ones.

    Conclusions:

    • This study reveals a distinct distribution pattern for the NMDA receptor in the teleost brain, with enrichment in the NOR.
    • The observed increase in NMDAR1 expression in the NOR during sexual maturation suggests a functional role in GnRH regulation and reproductive development.
    • This is the first report linking NMDA receptor expression in GnRH-containing brain areas to age and maturity in teleosts.